CN113629698A - Alternating current-direct current micro-grid system based on multi-power-supply electric power fusion - Google Patents

Alternating current-direct current micro-grid system based on multi-power-supply electric power fusion Download PDF

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CN113629698A
CN113629698A CN202010379708.8A CN202010379708A CN113629698A CN 113629698 A CN113629698 A CN 113629698A CN 202010379708 A CN202010379708 A CN 202010379708A CN 113629698 A CN113629698 A CN 113629698A
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power
current
medium
low
alternating current
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周锡卫
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention belongs to the technical field of micro-grids, and particularly relates to an alternating current-direct current micro-grid system based on multi-power-supply power fusion. The system has the advantages that the innovative dynamic flexible system reconstruction technology is utilized to realize multi-path power guarantee of multi-voltage level, multi-power path, multi-power supply power fusion operation and power load, real-time dynamic regulation and control are carried out on a plurality of independent and controlled interconnected double-voltage level alternating current and direct current micro-grids of multi-power supply power fusion, effective guarantee of a system framework is provided for effectively stabilizing fluctuation of new energy power, completing multi-power supply planning and non-planning switching and realizing seamless switching of multi-power supply, stability and safety of system power supply are greatly improved, and the problem that in a certain power utilization area, power grids, new energy distributed power, self-contained power plants, emergency power supplies and other power need to be reasonably and effectively fused and operated, and stable and reliable power is provided for alternating current and direct current loads of different voltage levels is effectively solved.

Description

Alternating current-direct current micro-grid system based on multi-power-supply electric power fusion
Technical Field
The invention belongs to the technical field of micro-grids, and particularly relates to an alternating current-direct current micro-grid system based on multi-power-supply power fusion.
Background
Under the dual background of energy shortage and increasing environmental problems, the development of micro-grids based on new energy and renewable energy is currently an important technology and application. The micro-grid is a flexible, efficient, safe and economical power supply solution and is one of the important ways to vigorously develop new energy power applications. In a certain power utilization area, power of a power grid, new energy distributed power, a self-contained power plant, an emergency power supply and the like needs to be reasonably and effectively integrated and provide stable and reliable power for alternating current and direct current loads with different voltage levels. Modern power requirements tend to the requirements of alternating current and direct current hybrid power more and more, a large amount of information equipment needs low-voltage direct current power, electric vehicles need medium-voltage direct current power for quick charging piles, alternating current power is widely used traditionally, and new energy distributed power application is expanded increasingly, an alternating current and direct current hybrid micro-grid system with new energy distributed power and an existing power grid fused needs to be constructed, and safe, stable, economical and reliable alternating current and direct current power supply is the technical trend that new energy power is fused by the power grid and rotor power.
The invention discloses an alternating current-direct current micro-grid system based on multi-power-supply power fusion, which utilizes innovative system architecture design to ensure multi-power-supply power fusion operation, realizes multi-voltage grade, multi-power path, multi-power-supply power fusion operation and multi-path power guarantee of power loads through a dynamic flexible system reconstruction technology, effectively restrains the fluctuation of new energy power, completes multi-power-supply planned and unplanned switching and realizes seamless switching of multiple power supplies through real-time operation control of the multi-power-supply power fusion alternating current-direct current micro-grid system, and greatly improves the stability and safety of power supply.
Disclosure of Invention
In order to realize a safe, stable, economic and reliable power supply and a multi-power-supply power fusion running alternating-direct-current hybrid micro-grid system, the invention particularly discloses a multi-power-supply power fusion-based alternating-current and direct-current micro-grid system, wherein a 1 st power supply and a 2 nd power supply which are supplied by two paths of power supplies form two independent and controlled interconnected double-voltage-level alternating-current micro-grids through a 1 st middle-high voltage alternating-current power bus and a 2 nd middle-high voltage alternating-current power bus two-section middle-high voltage alternating-current power bus respectively, the two double-voltage-level alternating-current micro-grids are connected with a double-voltage-level direct-current micro-grid through an inverter connected with the middle-high voltage alternating-current bus and an inverter connected with a low-voltage alternating-current bus through the middle-high voltage alternating-current bus and the low-voltage direct-current bus respectively, and a micro-grid EMS main control system dynamically connects and controls each power device, load device and an electric control switch through a communication network, the AC/DC micro-grid control system with multi-power supply power integration is formed, a micro-grid EMS master control system dynamically optimizes and constructs AC and DC multi-power paths, important loads and medium-voltage DC power loads for supplying power to a DC double circuit, low-voltage DC loads and micro-grid protection and measurement and control electric equipment provide hierarchical power conservation and uninterrupted power supply according to set priority, and quick charging power can be provided for an electric automobile through a medium-voltage DC charging pile.
An alternating current-direct current micro-grid system based on multi-power supply electric power fusion, wherein two independent and controlled interconnected double-voltage-level alternating current micro-grids are characterized in that: the 1 st power supply is connected with the 1 st medium-high voltage alternating current power bus through the 1 st power supply line electric control switch, the 1 st medium-high voltage alternating current power bus is respectively connected with a medium-high voltage alternating current new energy power generation grid-connected system and a medium-high voltage alternating current electric load, and is connected with a low-voltage level alternating current and direct current micro-grid which is formed by connecting low-voltage alternating current power buses through a 2 nd transformer and has the double characteristics of power supply and load, so that two independent double-level alternating current and direct current micro-grids with different voltage levels based on the medium-high voltage alternating current bus are formed; meanwhile, a 2 nd power supply is connected with a 2 nd medium-high voltage alternating current power bus through a 2 nd power supply line electric control switch, a 2 nd medium-high voltage alternating current power bus is respectively connected with a medium-high voltage rotor power generation system connected with the medium-high voltage alternating current power bus through a rotor power generation system and a medium-high voltage alternating current energy storage battery pack string connected in sequence through a 1 st transformer, and an inverter connected with the medium-high voltage direct current bus through a 3 rd transformer and a medium-high voltage alternating current bus is connected with a medium-high voltage direct current bus to form a double-voltage level direct current micro-grid with double characteristics of a power supply and a load, so as to form another independent double-layer alternating current-direct current micro-grid with two different voltage levels based on the medium-high voltage alternating current bus, and the medium-high voltage alternating current power bus is connected with the 1 st medium-high voltage alternating current power bus and the 2 nd medium-high voltage alternating current power bus through a connection electric control switch between the medium-high voltage alternating current power buses, two independent and controlled interconnected alternating current micro-grids of two dual voltage levels are formed.
An alternating current-direct current micro-grid system based on multi-power supply electric power fusion is characterized in that: the micro-grid EMS master control system is respectively connected with a 1 st power supply line electric control switch, a 2 nd power supply line electric control switch, a middle and high voltage AC power bus connecting electric control switch through a communication network, a rotor power generation system is connected with a middle and high voltage AC power bus connecting electric control switch, a rotor power generation system is connected with a low voltage AC power bus connecting electric control switch, a middle and high voltage DC bus is connected with a charging pile, a middle and high voltage energy storage system inverter, a middle and high voltage AC bus and middle voltage DC bus connected inverter, a new energy source power generation is connected with a low voltage AC bus inverter, a low voltage AC bus connected energy storage inverter, a low voltage DC bus and low voltage AC bus connected inverter, a middle and high voltage AC energy storage battery string, a low voltage AC energy storage battery string, a middle voltage DC energy storage battery string, a low voltage DC two-way power supply energy storage battery string, A low-voltage direct-current energy storage battery pack string, a low-voltage energy storage DC/DC of a direct-current double-path power supply load, a medium-voltage direct-current energy storage DC/DC, a DC/DC connecting a medium-voltage bus and a low-voltage direct-current bus, a medium-voltage direct-current new energy power generation DC/DC, a low-voltage direct-current energy storage DC/DC, a medium-voltage alternating-current power utilization load, a low-voltage alternating-current power utilization load, a direct-current double-path power supply important load, a medium-voltage direct-current power utilization load, a medium-voltage direct-current charging pile, a low-voltage direct-current load, a micro-grid protection and measurement and control power utilization device, a medium-voltage alternating-current new energy power generation grid-connected system, a low-voltage alternating-current new energy power generation system, a medium-voltage direct-current new energy power generation system, a medium-voltage alternating-current rotor power generation system and a low-voltage alternating-current rotor power generation system, an energy management and control and operation measurement and control system of a multi-power-supply electric power fusion AC/DC micro-grid system forming an AC/DC multi-micro-grid architecture.
An alternating current-direct current micro-grid system based on multi-power-supply electric power fusion is characterized in that: the medium-voltage direct-current micro-grid is formed by connecting a medium-voltage direct-current power bus with a medium-voltage direct-current electric load, respectively connecting a corresponding direct-current two-way power supply important load through a medium-voltage DC/DC, a medium-voltage direct-current energy storage DC/DC, a medium-voltage direct-current new energy power generation DC/DC, a medium-voltage direct-current bus and an electric control switch connected with a charging pile to form a medium-voltage direct-current micro-grid, and simultaneously, the low-voltage direct-current power bus is respectively connected with a low-voltage direct-current load, micro-grid protection and measurement and control electric equipment, low-voltage energy storage DC/DC of the direct-current two-way power supply load is connected with a low-voltage two-way direct-current power supply energy storage battery pack string, low-voltage direct-current new energy power generation DC/DC is connected with a low-voltage direct-current new energy power generation system, and low-voltage direct-current energy storage DC/DC is connected with a low-voltage direct-current energy storage battery pack string, forming a low-voltage direct-current micro-grid; and the DC/DC connected with the medium-voltage direct-current bus and the low-voltage direct-current bus is connected with the medium-voltage direct-current bus and the low-voltage direct-current bus to form a double-voltage-level direct-current micro-grid.
An alternating current-direct current micro-grid system based on multi-power-supply power fusion is characterized in that the alternating current and direct current multi-power path is as follows: the 1 st power supply is connected with the 1 st medium-high voltage alternating current power bus through the 1 st power supply line electric control switch, and the 1 st medium-high voltage alternating current power bus is connected with the medium-high voltage alternating current electric load to form a power path for supplying power to the medium-high voltage alternating current electric load by the 1 st power supply;
the 1 st power supply is connected with the 1 st medium-high voltage alternating current power bus through the 1 st power supply line electric control switch, the 1 st medium-high voltage alternating current power bus is connected with the low-voltage alternating current power bus through the 2 nd transformer, the low-voltage alternating current power bus is connected with the low-voltage alternating current power load, and a power path for supplying power to the low-voltage alternating current power load by the 1 st power supply is formed;
the 1 st power supply is connected with the 1 st medium-high voltage alternating current power bus through the 1 st power supply line electric control switch, the 1 st medium-high voltage alternating current power bus is connected with the low-voltage alternating current power bus through the 2 nd transformer, an inverter connected with the low-voltage alternating current bus through the low-voltage direct current bus and the low-voltage direct current power bus is connected with the low-voltage direct current power bus, the low-voltage direct current power bus is connected with the direct current double-path power supply important load, the low-voltage direct current load and the microgrid protection and measurement and control electric equipment, and an electric power path for supplying power to the direct current double-path power supply important load, the low-voltage direct current load and the microgrid protection and measurement and control electric equipment by the 1 st power supply is formed;
the 1 st power supply is connected with the 1 st medium-high voltage alternating current power bus through the 1 st power supply line electric control switch, the 1 st medium-high voltage alternating current power bus is connected with the 2 nd medium-high voltage alternating current power bus through the connection electric control switch between the medium-high voltage alternating current power buses, the 2 nd medium-high voltage alternating current power bus is connected with the medium-high voltage direct current power bus through the 3 rd transformer and the inverter connected with the medium-high voltage alternating current bus in sequence, and a power path for supplying power to the 1 st power supply for a direct current two-way power supply important load, a medium-voltage direct current power load and a medium-voltage direct current charging pile is formed;
the medium-high voltage alternating current new energy power generation grid-connected system is connected with a 1 st medium-high voltage alternating current power bus, and the 1 st medium-high voltage alternating current power bus is connected with a medium-high voltage alternating current power load to form a power path for supplying power to the medium-high voltage alternating current power load by the medium-high voltage alternating current new energy power generation grid-connected system;
the medium-high voltage alternating current new energy power generation grid-connected system is connected with a 1 st medium-high voltage alternating current power bus, the 1 st medium-high voltage alternating current power bus is connected with a low-voltage alternating current power bus through a 2 nd transformer, and the low-voltage alternating current power bus is connected with a low-voltage alternating current power load, so that a power path for supplying power to the low-voltage alternating current power load by the medium-high voltage alternating current new energy power generation grid-connected system is formed;
the medium-high voltage alternating current new energy power generation grid-connected system is connected with a 1 st medium-high voltage alternating current power bus, the 1 st medium-high voltage alternating current power bus is connected with a low-voltage alternating current power bus through a 2 nd transformer, an inverter connected with the low-voltage alternating current bus through a low-voltage direct current bus by a low-voltage alternating current power bus is connected with a low-voltage direct current power bus and connected with a direct current double-path power supply important load, a low-voltage direct current load and microgrid protection and measurement and control electric equipment, and a power path for supplying power to the direct current double-path power supply important load, the low-voltage direct current load and the microgrid protection and measurement and control electric equipment by the medium-high voltage alternating current new energy power generation grid-connected system is formed;
the medium-high voltage AC new energy power generation grid-connected system is connected with a 1 st medium-high voltage AC power bus, the 1 st medium-high voltage AC power bus is connected with a 2 nd medium-high voltage AC power bus through a connection electric control switch between the medium-high voltage AC power buses, the 2 nd medium-high voltage AC power bus is connected with a medium-voltage DC power bus through a 3 rd transformer and an inverter connected with the medium-high voltage AC bus and the medium-voltage DC bus in sequence, the medium-voltage DC power bus is connected with a medium-voltage DC power load, the medium-voltage DC power load is connected with a medium-voltage DC charging pile through the electric control switch connected with the charging pile through the medium-voltage DC bus, and a DC dual-path power supply important load corresponding to the medium-voltage DC/DC connection of the DC dual-path power supply load is connected, so that the medium-high voltage AC new energy power generation grid-connected system is an important load for DC dual-path power supply, a power path for supplying power to the medium-voltage direct-current power load and the medium-voltage direct-current charging pile;
a 2 nd power supply is connected with a 2 nd medium-high voltage alternating current power bus through a 2 nd power supply line electric control switch, the 2 nd medium-high voltage alternating current power bus is connected with a medium-voltage direct current power bus through a 3 rd transformer and an inverter connected with the medium-high voltage alternating current bus and the medium-voltage direct current bus in sequence, the medium-voltage direct current power bus is connected with a medium-voltage direct current power load, the medium-voltage direct current power load is connected with the electric control switch connected with a charging pile through the medium-voltage direct current bus, and the medium-voltage DC/DC of the direct current double-path power supply load is connected with a corresponding direct current double-path power supply important load, so that a power path for supplying power to the 2 nd power supply to the direct current double-path power supply important load, the medium-voltage direct current power load and the medium-voltage direct current charging pile is formed;
the 2 nd power supply is connected with the 2 nd middle-high voltage alternating current power bus through the 2 nd power supply line electric control switch, the 2 nd middle-high voltage alternating current power bus is connected with the 1 st middle-high voltage alternating current power bus through the connection electric control switch between the middle-high voltage alternating current power buses, and the 1 st middle-high voltage alternating current power bus is connected with the middle-high voltage alternating current power load to form a power path for supplying power to the middle-high voltage alternating current power load by the 2 nd power supply;
the 2 nd power supply is connected with the 2 nd middle-high voltage alternating current power bus through the 2 nd power supply line electric control switch, the 2 nd middle-high voltage alternating current power bus is connected with the 1 st middle-high voltage alternating current power bus through the connection electric control switch between the middle-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus is connected with the low voltage alternating current power bus through the 2 nd transformer, the low voltage alternating current power bus is connected with the low voltage alternating current power load, and a power path for supplying power to the low voltage alternating current power load by the 2 nd power supply line is formed;
a 2 nd power supply is connected with a 2 nd medium-high voltage alternating current power bus through a 2 nd power supply line electric control switch, the 2 nd medium-high voltage alternating current power bus is connected with a 1 st medium-high voltage alternating current power bus through a connection electric control switch between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus is connected with a low-voltage alternating current power bus through a 2 nd transformer, an inverter connected with the low-voltage alternating current bus through a low-voltage direct current bus and connected with a direct current two-way power supply important load, a low-voltage direct current load and microgrid protection and measurement and control electric equipment through the low-voltage direct current power bus, and a power path for supplying power to the direct current two-way power supply important load, the low-voltage direct current load and the microgrid protection and measurement and control electric equipment by the 2 nd power supply is formed;
the middle-high voltage alternating current rotor power generation system is connected with a middle-high voltage alternating current power bus through a connection electric control switch of a rotor power generation system access middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus 2 is connected with a middle-high voltage direct current power bus through a 3 rd transformer and an inverter connected with the middle-high voltage alternating current bus and the middle-high voltage direct current bus in sequence, the middle-high voltage direct current power bus is connected with a middle-high voltage direct current power utilization load, the middle-high voltage direct current charging pile is connected with the electric control switch connected with the charging pile through the middle-high voltage direct current bus, and the middle-voltage DC/DC of the direct current double-path power supply load is connected with a corresponding direct current double-path power supply important load, so that a power path for supplying power to the direct current double-path power supply important load, the middle-voltage direct current power utilization load and the middle-high voltage direct current charging pile is formed by the middle-high voltage alternating current rotor power generation system;
the middle-high voltage alternating current rotor power generation system is connected with a middle-high voltage alternating current power bus through a connection electric control switch of the rotor power generation system connected to the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus in the 2 nd is connected with a middle-high voltage alternating current power bus in the 1 st through a connection electric control switch between the middle-high voltage alternating current power buses, and the middle-high voltage alternating current power bus in the 1 st is connected with a middle-high voltage alternating current electric load to form an electric power path of the middle-high voltage alternating current rotor power generation system for supplying power to the middle-high voltage alternating current electric load;
the middle-high voltage alternating current rotor power generation system is connected with a middle-high voltage alternating current power bus through a connection electric control switch of the rotor power generation system connected to the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus 2 is connected with a middle-high voltage alternating current power bus 1 through a connection electric control switch between the middle-high voltage alternating current power buses, the middle-high voltage alternating current power bus 1 is connected with a low-voltage alternating current power bus through a 2 nd transformer, the low-voltage alternating current power bus is connected with a low-voltage alternating current electric load, and a power path for supplying power to the low-voltage alternating current electric load by the middle-high voltage alternating current rotor power generation system is formed;
the middle-high voltage AC rotor power generation system is connected with a middle-high voltage AC power bus through a connection electric control switch of a rotor power generation system connected with the middle-high voltage AC power bus, the middle-high voltage AC power bus 2 is connected with a middle-high voltage AC power bus through the connection electric control switch between the middle-high voltage AC power buses, the middle-high voltage AC power bus 1 is connected with a low-voltage AC power bus through a 2 nd transformer, an inverter of the low-voltage AC power bus connected with the low-voltage AC power bus through a low-voltage DC bus is connected with a low-voltage DC power bus, the low-voltage DC power bus is connected with a DC double-circuit power supply important load, a low-voltage DC load and a micro-grid protection and measurement and control electrical device, so that the middle-high voltage AC rotor power generation system is an important load for DC double-circuit power supply, a power path for supplying power to low-voltage direct-current load, microgrid protection and measurement and control electric equipment;
the medium-high voltage energy storage system inverter is connected with a medium-high voltage alternating current energy storage battery pack string and is connected with a 2 nd medium-high voltage alternating current power bus through a 1 st transformer, the 2 nd medium-high voltage alternating current power bus is connected with a medium-high voltage direct current power bus through a 3 rd transformer and an inverter connected with the medium-high voltage alternating current bus in sequence, the medium-voltage direct current power bus is connected with a medium-voltage direct current power load, the medium-voltage direct current power load is connected with an electric control switch connected with a charging pile through the medium-voltage direct current bus, and the medium-voltage DC/DC of the direct current double-path power supply load is connected with a corresponding direct current double-path power supply important load, so that a power path for supplying power to the direct current double-path power important load, the medium-voltage direct current power load and the medium-voltage direct current power supply load by the medium-high voltage energy storage system inverter is formed;
the medium-high voltage energy storage system inverter is connected with a medium-high voltage alternating current energy storage battery pack string and is connected with a 2 nd medium-high voltage alternating current power bus through a 1 st transformer, the 2 nd medium-high voltage alternating current power bus is connected with a 1 st medium-high voltage alternating current power bus through a connecting electric control switch between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus is connected with a medium-high voltage alternating current power load, and a power path for supplying power to the medium-high voltage alternating current power load by the medium-high voltage energy storage system inverter is formed;
the medium-high voltage energy storage system inverter is connected with a medium-high voltage alternating current energy storage battery pack string and is connected with a 2 nd medium-high voltage alternating current power bus through a 1 st transformer, the 2 nd medium-high voltage alternating current power bus is connected with a 1 st medium-high voltage alternating current power bus through a connection electric control switch between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus is connected with a low-voltage alternating current power bus through a 2 nd transformer, the low-voltage alternating current power bus is connected with a low-voltage alternating current electric load, and a power path for supplying power to the low-voltage alternating current electric load by the medium-high voltage energy storage system inverter is formed;
the middle-high voltage energy storage system inverter is connected with a middle-high voltage alternating current energy storage battery pack string and is connected with a 2 nd middle-high voltage alternating current power bus through a 1 st transformer, the 2 nd middle-high voltage alternating current power bus is connected with a 1 st middle-high voltage alternating current power bus through a connection electric control switch between the middle-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus is connected with a low-voltage alternating current power bus through a 2 nd transformer, the inverter connected with the low-voltage alternating current bus through the low-voltage direct current bus and connected with a direct current two-way power supply important load, a low-voltage direct current load and microgrid protection and measurement and control electric equipment, and a power path for supplying power to the direct current two-way power supply important load, the low-voltage direct current load and the microgrid protection and measurement and control electric equipment by the low-voltage direct current power bus is formed;
the inverter of the new energy power generation access low-voltage AC bus is connected with the low-voltage AC new energy power generation system and is accessed into the low-voltage AC power bus, and the low-voltage AC power bus is connected with the low-voltage AC power load to form a power path for supplying power to the low-voltage AC power load by the low-voltage AC new energy power generation system;
the inverter of the new energy power generation access low-voltage AC bus is connected with a low-voltage AC new energy power generation system and is accessed into a low-voltage AC power bus, the inverter of the low-voltage AC power bus connected with the low-voltage AC bus through the low-voltage DC bus is connected with a low-voltage DC power bus and connected with a DC double-path power supply important load, a low-voltage DC load and microgrid protection and measurement and control electric equipment through the low-voltage DC power bus, and an electric power path for supplying power to the DC double-path power supply important load, the low-voltage DC load and the microgrid protection and measurement and control electric equipment by the low-voltage AC new energy power generation system is formed;
the energy storage inverter accessed by the low-voltage AC bus is connected with the low-voltage AC energy storage battery pack string and is accessed into the low-voltage AC power bus, and the low-voltage AC power bus is connected with the low-voltage AC power load to form a power path for supplying power to the low-voltage AC power load by the energy storage inverter accessed by the low-voltage AC bus;
the energy storage inverter accessed by the low-voltage alternating-current bus is connected with the low-voltage alternating-current energy storage battery pack string and accessed into the low-voltage alternating-current power bus, the inverter connected with the low-voltage alternating-current bus through the low-voltage direct-current bus is connected with the low-voltage direct-current power bus and connected with the direct-current two-way power supply important load, the low-voltage direct-current load and the microgrid protection and measurement and control electric equipment through the low-voltage direct-current power bus, and the energy storage inverter accessed by the low-voltage alternating-current bus forms an electric power path for supplying power to the direct-current two-way power supply important load, the low-voltage direct-current load and the microgrid protection and measurement and control electric equipment;
the low-voltage alternating-current rotor power generation system is connected with a low-voltage alternating-current power bus through a connecting electric control switch of the rotor power generation system, and the low-voltage alternating-current power bus is connected with a low-voltage alternating-current power load to form a power path for supplying power to the low-voltage alternating-current power load by the low-voltage alternating-current rotor power generation system;
the low-voltage alternating-current rotor power generation system is connected with a low-voltage alternating-current power bus through a connecting electric control switch of the rotor power generation system, the low-voltage alternating-current power bus is connected with an inverter connected with the low-voltage alternating-current power bus through a low-voltage direct-current bus, the low-voltage direct-current power bus is connected with a direct-current two-way power supply important load, a low-voltage direct-current load and microgrid protection and measurement and control electric equipment through the low-voltage direct-current power bus, and an electric power path for supplying power to the direct-current two-way power supply important load, the low-voltage direct-current load and the microgrid protection and measurement and control electric equipment by the low-voltage alternating-current rotor power generation system is formed;
the medium-voltage direct-current new energy power generation system is connected with a medium-voltage direct-current power bus through medium-voltage direct-current new energy power generation DC/DC, the medium-voltage direct-current power bus is connected with a medium-voltage direct-current power load, an electric control switch connected with a charging pile through the medium-voltage direct-current bus is connected with a medium-voltage direct-current charging pile and a direct-current double-path power supply important load corresponding to the medium-voltage DC/DC connection of the direct-current double-path power supply load, the DC/DC connected with a low-voltage direct-current power bus through the medium-voltage direct-current bus and the low-voltage direct-current power bus is connected with the direct-current double-path power supply important load, the low-voltage direct-current load and microgrid protection and measurement and control electric equipment, forming a power path for supplying power to important loads, medium-voltage direct-current power loads, medium-voltage direct-current charging piles, low-voltage direct-current loads, micro-grid protection and measurement and control power equipment by the medium-voltage direct-current new energy power generation system;
the medium-voltage direct-current energy storage DC/DC is connected with a medium-voltage direct-current energy storage battery pack and is serially connected into a medium-voltage direct-current power bus, the medium-voltage direct-current power bus is connected with a medium-voltage direct-current electricity utilization load, an electric control switch connected with a charging pile through the medium-voltage direct-current bus is connected with a medium-voltage direct-current charging pile and a direct-current double-path electricity supply important load corresponding to the medium-voltage DC/DC connection of the direct-current double-path electricity supply load, the DC/DC connected with a low-voltage direct-current bus through the medium-voltage direct-current bus and the low-voltage direct-current bus is connected with a direct-current double-path electricity supply important load, a low-voltage direct-current load and a micro-grid protection and measurement and control electricity utilization device, forming a power path for supplying power to important loads, medium-voltage direct-current power loads, medium-voltage direct-current charging piles, low-voltage direct-current loads, micro-grid protection and measurement and control power equipment by the medium-voltage direct-current new energy power generation system;
the low-voltage energy storage DC/DC of the direct-current double-path power supply load is connected with a low-voltage direct-current double-path power supply energy storage battery pack string and is simultaneously connected with a direct-current double-path power supply important load and a low-voltage direct-current power bus, the low-voltage direct-current power bus is connected with the low-voltage direct-current load and microgrid protection and measurement and control electric equipment, and a power path for supplying power to the direct-current double-path power supply important load, the low-voltage direct-current load and the microgrid protection and measurement and control electric equipment is formed by the low-voltage energy storage DC/DC of the direct-current double-path power supply load;
the low-voltage direct-current new energy power generation system is connected with a low-voltage direct-current power bus through low-voltage direct-current new energy power generation DC/DC, and the low-voltage direct-current power bus is connected with a direct-current double-path power supply important load, a low-voltage direct-current load and microgrid protection and measurement and control power utilization equipment to form a power path for supplying power to the direct-current double-path power supply important load, the low-voltage direct-current load and the microgrid protection and measurement and control power utilization equipment by the low-voltage direct-current new energy power generation system;
the low-voltage direct-current energy storage battery pack string is connected with a low-voltage direct-current power bus through a low-voltage direct-current energy storage DC/DC, and the low-voltage direct-current power bus is connected with a direct-current double-path power supply important load, a low-voltage direct-current load and microgrid protection and measurement and control electric equipment to form an electric power path for supplying power to the direct-current double-path power supply important load, the low-voltage direct-current load, the microgrid protection and measurement and control electric equipment by the low-voltage direct-current energy storage DC/DC.
An alternating current-direct current micro-grid system based on multi-power-supply electric fusion is characterized in that the alternating current and direct current multi-power path is characterized in that: the 1 st and the 2 nd high-voltage alternating-current power buses are connected with the 2 nd and the middle-high-voltage alternating-current power buses through the connection electric control switch between the middle and the high-voltage alternating-current power buses, and are connected with the middle-high-voltage direct-current power buses through the 3 rd transformer and an inverter connected with the middle-high-voltage alternating-current power buses to form a power path between the 1 st and the 2 nd and the middle-high-voltage alternating-current power buses;
meanwhile, the 1 st and middle high voltage AC power bus is connected with the 2 nd and middle high voltage AC power bus through a connection electric control switch between the middle and high voltage AC power buses, and is connected with the low voltage AC power bus through a 2 nd transformer to form a power path between the 1 st and middle high voltage AC power bus and the 2 nd and middle and high voltage AC power bus;
the low-voltage AC power bus is connected with the low-voltage DC power bus through an inverter connected with the low-voltage AC bus through the low-voltage DC bus to form a power path between the low-voltage AC power bus and the low-voltage DC power bus;
the medium voltage direct current power bus is connected with the low voltage direct current power bus through the DC/DC which is connected with the medium voltage direct current bus and the low voltage direct current bus to form a power path between the medium voltage direct current power bus and the low voltage direct current power bus.
The invention relates to an alternating current-direct current micro-grid system based on multi-power-supply power fusion, which realizes multi-voltage-level multi-power-path multi-power-supply power fusion operation and multi-path power guarantee of power loads by utilizing an innovative dynamic flexible system reconstruction technology, by dynamically adjusting and controlling a plurality of independent and controlled interconnected double-voltage-level alternating-current and direct-current micro-grids fused with multi-power supply in real time, the system provides effective guarantee for effectively stabilizing the fluctuation of new energy power, completing planned and unplanned switching of the multi-power supply and realizing seamless switching of the multi-power supply, greatly improves the stability and safety of system power supply, effectively solves the problem that in a certain power utilization area, the method needs to reasonably and effectively fuse and operate power of a power grid, new energy distributed power, a self-contained power plant, an emergency power supply and the like and provide stable and reliable power for alternating current and direct current loads with different voltage levels; the method provides a solution for constructing the fusion of new energy distributed power, a rotor power supply and the existing power grid for increasingly expanded new energy distributed power application, and the AC/DC hybrid micro-grid system realizes safe, stable, economic and reliable AC/DC power supply, and is a technical trend of the fusion of new energy power, the power grid and the rotor power.
Drawings
Fig. 1 is a schematic block diagram of an alternating current-direct current micro-grid system based on multi-power supply power fusion and a composition thereof.
Detailed Description
An ac/dc micro-grid system based on multi-power supply power fusion is described as an embodiment example with reference to the drawings, but the described embodiment is a part of, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The techniques and schemes of the present invention are not limited to those given in this example.
As shown in figure 1, an alternating current-direct current micro-grid system based on multi-power supply power fusion is characterized in that a 1 st power supply (1) and a 2 nd power supply (2) which are powered by two paths of power supplies respectively form two independent and controlled interconnected double-voltage-level alternating current micro-grids through a 1 st middle-high voltage alternating current power bus (3) and a 2 nd middle-high voltage alternating current power bus (4), the two double-voltage-level alternating current micro-grids are respectively connected with a double-voltage-level direct current micro-grid through an inverter (202) which is connected with the middle-high voltage direct current bus and a low-voltage direct current bus and an inverter (205) which is connected with the low-voltage alternating current bus through the middle-high voltage alternating current bus, the 1 st power supply (1) and the 2 nd power supply (2) supply are powered simultaneously and independently run, the double-voltage-level direct current micro-grids are respectively used as units with power supply and load characteristics to comprehensively regulate and balance power and energy of respective systems, when one power supply of a 1 st power supply (1) and a 2 nd power supply (2) supplies power and the other power supply does not supply power, a 1 st middle-high voltage alternating current power bus (3) and a 2 nd middle-high voltage alternating current power bus (4) are communicated through a connection electric control switch (9) between the middle-high voltage alternating current power buses to serve as a double-voltage-level alternating current micro-grid, and the 1 st power supply (1) and the 2 nd power supply (2) and other power generation systems and energy storage systems are controlled to be switched and complementarily replaced; and the micro-grid EMS master control system (15) dynamically connects and controls each power device, load device and electric control switch in real time through the communication network (8) to form a multi-power-supply power-fused AC/DC micro-grid control system, the micro-grid EMS master control system (15) dynamically optimizes and constructs AC and DC multi-power paths, provides hierarchical power conservation and uninterrupted power supply for a DC double-path power supply important load (601), a medium-voltage DC power load (602), a low-voltage DC load (701) and micro-grid protection and measurement and control electric equipment (702) according to set priorities, and provides quick charging power for the electric automobile through a medium-voltage DC charging pile (603), thereby realizing the intelligent management, optimization and regulation of grid source and power storage.
An alternating current-direct current micro-grid system based on multi-power supply electric power fusion, wherein two independent and controlled interconnected double-voltage-level alternating current micro-grids are characterized in that: the 1 st power supply (1) is connected with a 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is respectively connected with a medium-high voltage alternating current new energy power generation grid-connected system (801) and a medium-high voltage alternating current electric load (501), and a 2 nd transformer (102) is connected with a low-voltage level alternating current-direct current micro-grid which is formed by connecting low-voltage alternating current power buses (7) and has the double characteristics of power supply and load, so that two independent double-level alternating current-direct current micro-grids with different voltage levels based on the medium-high voltage alternating current buses are formed; meanwhile, a 2 nd power supply (2) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd medium-high voltage alternating current power bus (4) is respectively connected with a medium-high voltage alternating current rotor power generation system (901) accessed through a connection electric control switch (10) accessed to the medium-high voltage alternating current power bus by a rotor power generation system, a medium-high voltage energy storage system inverter (201) and a medium-high voltage alternating current energy storage battery pack string (301) are sequentially connected through a 1 st transformer (101), and an inverter (202) connected with the medium-high voltage direct current bus by a 3 rd transformer (103) and the medium-high voltage alternating current bus is connected by a medium-high voltage direct current power bus (12) to form a double-voltage level direct current micro-grid with the dual characteristics of power supply and load, so as to form another independent double-level alternating current and direct current micro-direct current grid based on two different voltage levels of the medium-high voltage alternating current bus, and a connection electric control switch (9) between the medium-high voltage alternating current power buses is connected with the 1 st medium-high voltage alternating current power bus (3) and the 2 nd medium-high voltage alternating current power bus (4) to form two independent and controlled interconnected double-voltage-level alternating current micro-grids.
An alternating current-direct current micro-grid system based on multi-power supply electric power fusion is characterized in that: the micro-grid EMS master control system (15) is respectively connected with a 1 st power supply line electric control switch (5), a 2 nd power supply line electric control switch (6) and a middle-high voltage alternating current power bus connection electric control switch (9) through a communication network (8), a rotor power generation system is connected with a middle-high voltage alternating current power bus connection electric control switch (10), a rotor power generation system is connected with a low voltage alternating current power bus connection electric control switch (11), a middle voltage direct current bus and charging pile connection electric control switch (14), a middle-high voltage energy storage system inverter (201), a middle-high voltage alternating current bus and middle-high voltage direct current bus connection inverter (202), a new energy generation and low voltage alternating current bus connection inverter (203), a low voltage alternating current bus connection energy storage inverter (204), a low voltage direct current bus and low voltage alternating current bus connection inverter (205), a middle-high voltage alternating current energy storage battery string (301), The system comprises a low-voltage alternating-current energy storage battery pack string (302), a medium-voltage direct-current energy storage battery pack string (303), a low-voltage direct-current double-way power supply energy storage battery pack string (304), a low-voltage direct-current energy storage battery pack string (305), a low-voltage energy storage DC/DC (401) of a direct-current double-way power supply load, a medium-voltage DC/DC (402) of a direct-current double-way power supply load, a medium-voltage direct-current energy storage DC/DC (403), a DC/DC (404) connecting a medium-voltage bus and a low-voltage direct-current bus, a medium-voltage direct-current new energy power generation DC/DC (405), a low-voltage direct-current new energy power generation DC/DC (406), a low-voltage direct-current energy storage DC/DC (407), a medium-voltage alternating-current electric load (501), a low-voltage alternating-current electric load (502), a direct-current double-way power supply important load (601), a medium-voltage direct-current electric load (602), a medium-voltage direct-current direct current load (603), a low-voltage direct-current load (701), The system comprises a microgrid protection and measurement and control electric equipment (702), a medium-high voltage alternating current new energy power generation grid-connected system (801), a low-voltage alternating current new energy power generation system (802), a medium-voltage direct current new energy power generation system (803), a low-voltage direct current new energy power generation system (804), a medium-high voltage alternating current rotor power generation system (901) and a low-voltage alternating current rotor power generation system (902), and forms an energy management and control and operation measurement and control system of a multi-power-source power fusion alternating current and direct current microgrid system of an alternating current and direct current multi-microgrid framework.
An alternating current-direct current micro-grid system based on multi-power-supply electric power fusion is characterized in that: the medium-voltage direct-current micro-grid is formed by connecting a medium-voltage direct-current power bus (12) with a medium-voltage direct-current power load (602) and connecting a medium-voltage DC/DC (402), a medium-voltage direct-current energy storage DC/DC (403), a medium-voltage direct-current new energy power generation DC/DC (405) of the direct-current double-path power supply load respectively through a medium-voltage DC/DC (402), a medium-voltage direct-current energy storage DC/DC (405), connecting a medium-voltage direct-current bus with a corresponding direct-current double-path power supply important load (601), a medium-voltage direct-current energy storage battery pack string (303), a medium-voltage direct-current new energy power generation system (803) and a direct-current charging pile (604) through an electric control switch (14) connected with the medium-voltage direct-current bus, and simultaneously connecting a low-voltage direct-current load (701), a micro-grid protection and measurement and control electrical equipment (702) and connecting a low-voltage direct-current double-path power supply energy storage battery pack string (304) through a low-voltage energy storage DC/DC (401) of the direct-current double-path power supply load respectively, The low-voltage direct-current micro-grid is formed by connecting a low-voltage direct-current new energy power generation system (804) through a low-voltage direct-current new energy power generation DC/DC (406) and connecting a low-voltage direct-current energy storage battery pack string (305) through a low-voltage direct-current energy storage DC/DC (407); and a DC/DC (404) for connecting the medium-voltage and low-voltage direct-current buses is connected with the medium-voltage direct-current power bus (12) and the low-voltage direct-current power bus (13) to form a double-voltage-level direct-current microgrid.
An alternating current-direct current micro-grid system based on multi-power-supply power fusion is characterized in that the alternating current and direct current multi-power path is as follows: the 1 st power supply (1) is connected with the 1 st medium-high voltage alternating current power bus (3) through the 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with the medium-high voltage alternating current electric load (501), and a power path for supplying power to the medium-high voltage alternating current electric load (501) by the 1 st power supply (1) is formed;
the 1 st power supply (1) is connected with the 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with the low-voltage alternating current power bus (7) through a 2 nd transformer (102), and the low-voltage alternating current power bus (7) is connected with the low-voltage alternating current power load (502), so that a power path for supplying power to the low-voltage alternating current power load (502) by the 1 st power supply (1) is formed;
the 1 st power supply (1) is connected with a 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), an inverter (205) connected with the low-voltage alternating current bus through a low-voltage direct current bus and a low-voltage direct current bus (7) is connected with a low-voltage direct current power bus (13), the low-voltage direct current power bus (13) is connected with a direct current two-way power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the direct current two-way power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) by the 1 st power supply (1) is formed;
a 1 st power supply (1) is connected with a 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-high voltage direct current power bus (12) through a 3 rd transformer (103) and an inverter (202) connected with the medium-high voltage alternating current bus and the medium-high voltage direct current bus in sequence, and an electric power path for supplying power to an important load (601), a medium-voltage direct current power load charging pile (602) and a medium-voltage direct current bus (603) by the 1 st power supply (1) is formed;
the middle-high voltage alternating current new energy power generation grid-connected system (801) is connected with a 1 st middle-high voltage alternating current power bus (3), the 1 st middle-high voltage alternating current power bus (3) is connected with a middle-high voltage alternating current electric load (501), and a power path for supplying power to the middle-high voltage alternating current electric load (501) by the middle-high voltage alternating current new energy power generation grid-connected system (801) is formed;
the middle-high voltage alternating current new energy power generation grid-connected system (801) is connected with a 1 st middle-high voltage alternating current power bus (3), the 1 st middle-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), and a power path for supplying power to the low-voltage alternating current power load (502) by the middle-high voltage alternating current new energy power generation grid-connected system (801) is formed;
the middle-high voltage alternating current new energy power generation grid-connected system (801) is connected with a 1 st middle-high voltage alternating current power bus (3), the 1 st middle-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), an inverter (205) connected with the low-voltage alternating current bus through a low-voltage direct current bus and a low-voltage alternating current power bus (7) is connected with a low-voltage direct current power bus (13), and the low-voltage direct current power bus (13) is connected with a direct current two-way power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), so that a power path for supplying power to the direct current two-way power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the middle-high voltage alternating current new energy power generation grid-connected system (801);
the medium-high voltage AC new energy power generation grid-connected system (801) is connected with a 1 st medium-high voltage AC power bus (3), the 1 st medium-high voltage AC power bus (3) is connected with a 2 nd medium-high voltage AC power bus (4) through a connection electric control switch (9) between the medium-high voltage AC power buses, the 2 nd medium-high voltage AC power bus (4) is connected with a medium-voltage DC power bus (12) through a 3 rd transformer (103) and an inverter (202) with the medium-high voltage AC bus connected with the medium-high voltage DC bus in sequence, the medium-voltage DC power bus (12) is connected with a medium-voltage DC electric load (602), and meanwhile, the medium-voltage DC charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage DC bus, and a corresponding DC double-way power supply important load (601) is connected through a medium-voltage DC/DC (402) of the DC double-way power supply load, so that the medium-high voltage AC new energy power generation grid-high energy power system (801) is formed as the DC double-way power supply important load (601) A power path for supplying power to the medium-voltage direct-current electric load (602) and the medium-voltage direct-current charging pile (603);
a 2 nd power supply (2) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-voltage direct current power bus (12) through a 3 rd transformer (103) and an inverter (202) connected with the medium-high voltage alternating current bus and the medium-voltage direct current bus in sequence, the medium-voltage direct current power bus (12) is connected with a medium-voltage direct current power load (602), and simultaneously, the medium-voltage direct current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct current bus and is connected with a corresponding direct current double-way power supply important load (601) through a medium-voltage DC/DC (402) of the direct current double-way power supply load, a 2 nd power supply source (2) forms a power path for supplying power to a direct current double-path power supply important load (601), a medium-voltage direct current power load (602) and a medium-voltage direct current charging pile (603);
the 2 nd power supply (2) is connected with the 2 nd middle-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd middle-high voltage alternating current power bus (4) is connected with the 1 st middle-high voltage alternating current power bus (3) through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus (3) is connected with a middle-high voltage alternating current electric load (501), and a power path for supplying power to the middle-high voltage alternating current electric load (501) by the 2 nd power supply (2) is formed;
a 2 nd power supply (2) is connected with a 2 nd middle-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd middle-high voltage alternating current power bus (4) is connected with a 1 st middle-high voltage alternating current power bus (3) through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus (3) is connected with a low voltage alternating current power bus (7) through a 2 nd transformer (102), the low voltage alternating current power bus (7) is connected with a low voltage alternating current power load (502), and a power path for supplying power to the low voltage alternating current power load (502) by the 2 nd power supply (2) is formed;
the 2 nd power supply (2) is connected with the 2 nd middle-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd middle-high voltage alternating current power bus (4) is connected with the 1 st middle-high voltage alternating current power bus (3) through a middle-high voltage alternating current power bus connection electric control switch (9), the 1 st middle-high voltage alternating current power bus (3) is connected with the low voltage alternating current power bus (7) through a 2 nd transformer (102), the low voltage alternating current power bus (7) is connected with an inverter (205) connected with the low voltage alternating current bus through the low voltage direct current bus, the low voltage direct current power bus (13) is connected with a direct current double-way power supply important load (601), a low voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and the 2 nd power supply (2) is formed by connecting the direct current double-way power supply important load (601), A power path for supplying power to a low-voltage direct-current load (701) and a microgrid protection and measurement and control electric device (702);
the medium-high voltage alternating current rotor power generation system (901) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a connection electric control switch (10) of the rotor power generation system connected with the medium-high voltage alternating current power bus, the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-voltage direct current power bus (12) through a 3 rd transformer (103) and an inverter (202) of the medium-high voltage alternating current bus connected with the medium-voltage direct current bus in sequence, the medium-voltage direct current power bus (12) is connected with a medium-voltage direct current power load (602), meanwhile, the medium-voltage direct current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct current bus, and a corresponding direct current two-way power supply important load (601) is connected through a medium-voltage DC/DC (402) of the direct current two-way power supply load, so that the medium-high voltage alternating current rotor power generation system (901) is formed as a direct current two-way power supply important load (601), A power path for supplying power to the medium-voltage direct-current electric load (602) and the medium-voltage direct-current charging pile (603);
the middle-high voltage alternating current rotor power generation system (901) is connected with a middle-high voltage alternating current power bus (4) through a connection electric control switch (10) of the rotor power generation system connected to the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus (4) in the 2 nd is connected with a middle-high voltage alternating current power bus (3) in the 1 st through a connection electric control switch (9) between the middle-high voltage alternating current power buses, and the middle-high voltage alternating current power bus (3) in the 1 st is connected with a middle-high voltage alternating current electric load (501), so that an electric power path for supplying power to the middle-high voltage alternating current electric load (501) by the middle-high voltage alternating current rotor power generation system (901) is formed;
the middle-high voltage alternating current rotor power generation system (901) is connected with a middle-high voltage alternating current power bus (4) in a 2 nd through a connection electric control switch (10) of the rotor power generation system connected to the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus (4) in the 2 nd is connected with a middle-high voltage alternating current power bus (3) in a 1 st through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the middle-high voltage alternating current power bus (3) in the 1 st is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), and the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), so that a power path for supplying power to the low-voltage alternating current power load (502) by the middle-high voltage alternating current rotor power generation system (901) is formed;
the middle-high voltage alternating current rotor power generation system (901) is connected with a middle-high voltage alternating current power bus (4) through a connection electric control switch (10) of a rotor power generation system connected with the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus (4) in the 2 nd is connected with a middle-high voltage alternating current power bus (3) in the 1 st through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the middle-high voltage alternating current power bus (3) in the 1 st is connected with a low voltage alternating current power bus (7) through a 2 nd transformer (102), an inverter (205) connected with the low voltage alternating current bus (7) through the low voltage direct current bus is connected with a low voltage direct current power bus (13), and the low voltage direct current power bus (13) is connected with a direct current double-way power supply important load (601), a low voltage direct current load (701) and a microgrid protection and measurement and control electric equipment (702), a power path for supplying power to a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and microgrid protection and measurement and control electric equipment (702) is formed by the medium-high voltage alternating-current rotor power generation system (901);
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-high voltage direct current bus through a 3 rd transformer (103) and an inverter (202) connected with the medium-high voltage alternating current bus and the medium-high voltage direct current bus in sequence, the medium-high voltage direct current power bus (12) is connected with a medium-voltage direct current power load (602), the medium-voltage direct current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct current bus, and the corresponding direct current two-way power supply important load (601) is connected through a medium-voltage direct current/Direct Current (DC) of the direct current two-way power supply load, so that the medium-high voltage energy storage system inverter (201) is formed into the direct current two-way power supply important load (601), the medium-high voltage direct current two-way power supply load (602), A power path for supplying power to the medium-voltage direct-current charging pile (603);
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 nd medium-high voltage alternating current power bus (4) is connected with a 1 st medium-high voltage alternating current power bus (3) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus (3) is connected with a medium-high voltage alternating current electric load (501), and an electric power path for supplying power to the medium-high voltage alternating current electric load (501) by the medium-high voltage energy storage system inverter (201) is formed;
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 nd medium-high voltage alternating current power bus (4) is connected with a 1 st medium-high voltage alternating current power bus (3) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through the 2 nd transformer (102), and the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), so that a power path for supplying power to the low-voltage alternating current power load (502) by the medium-high voltage energy storage system inverter (201) is formed;
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 middle-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 middle-high voltage alternating current power bus (4) is connected with a 1 st middle-high voltage alternating current power bus (3) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), the low-voltage direct current power bus (13) is connected with an inverter (205) connected with the low-voltage alternating current bus through the low-voltage direct current bus (7), the low-voltage direct current power bus (13) is connected with a direct current two-way power supply important load (601), a low-voltage direct current load (701) and a microgrid protection and measurement and control electric device (702), and the medium-high voltage energy storage system inverter (201) is formed to supply the direct current two-way power supply important load (601), high voltage alternating current load (601), A power path for supplying power to a low-voltage direct-current load (701) and a microgrid protection and measurement and control electric device (702);
an inverter (203) of the new energy power generation access low-voltage alternating current bus is connected with a low-voltage alternating current new energy power generation system (802) and connected into a low-voltage alternating current power bus (7), the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), and a power path for supplying power to the low-voltage alternating current power load (502) by the low-voltage alternating current new energy power generation system (802) is formed;
an inverter (203) of a new energy power generation access low-voltage alternating current bus is connected with a low-voltage alternating current new energy power generation system (802) and is connected with a low-voltage alternating current power bus (7), the inverter (205) connected with the low-voltage alternating current bus through the low-voltage alternating current power bus (7) is connected with a low-voltage direct current power bus (13), the low-voltage direct current power bus (13) is connected with a direct current double-path power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the low-voltage alternating current new energy power generation system (802) through the direct current double-path power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed;
the energy storage inverter (204) accessed by the low-voltage alternating current bus is connected with the low-voltage alternating current energy storage battery pack string (302) and is accessed into the low-voltage alternating current power bus (7), the low-voltage alternating current power bus (7) is connected with the low-voltage alternating current electric load (502), and an electric power path for supplying power to the low-voltage alternating current electric load (502) is formed by the energy storage inverter (204) accessed by the low-voltage alternating current bus;
an energy storage inverter (204) accessed by a low-voltage alternating current bus is connected with a low-voltage alternating current energy storage battery pack string (302) and is accessed into a low-voltage alternating current power bus (7), the low-voltage alternating current power bus (7) is connected with an inverter (205) connected with the low-voltage alternating current bus through the low-voltage direct current bus, the inverter (13) is connected with a low-voltage direct current power bus (13), the low-voltage direct current power bus (7) is connected with a direct current double-path power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and an electric power path for supplying power to the direct current double-path power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the energy storage inverter (204) accessed by the low-voltage alternating current bus;
the low-voltage alternating-current rotor power generation system (902) is connected with a low-voltage alternating-current power bus (7) through a connecting electric control switch (11) of the rotor power generation system connected with the low-voltage alternating-current power bus, and the low-voltage alternating-current power bus (7) is connected with a low-voltage alternating-current power load (502) to form a power path for supplying power to the low-voltage alternating-current power load (502) by the low-voltage alternating-current rotor power generation system (902);
the low-voltage alternating-current rotor power generation system (902) is connected with a low-voltage alternating-current power bus (7) through a connection electric control switch (11) of the rotor power generation system connected with the low-voltage alternating-current power bus, an inverter (205) connected with the low-voltage alternating-current bus through the low-voltage direct-current bus (7) is connected with a low-voltage direct-current power bus (13), the low-voltage direct-current power bus (13) is connected with a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and microgrid protection and measurement and control electric equipment (702), and an electric power path for supplying power to the low-voltage alternating-current rotor power generation system (902) for the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed;
the medium-voltage direct-current new energy power generation system (803) is connected to a medium-voltage direct-current power bus (12) through a medium-voltage direct-current new energy power generation DC/DC (405), the medium-voltage direct-current power bus (12) is connected with a medium-voltage direct-current power load (602), meanwhile, the medium-voltage direct-current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct-current bus, the medium-voltage DC/DC (402) connected with a direct-current double-path power supply load is connected with a corresponding direct-current double-path power supply important load (601), the medium-voltage direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control power utilization equipment (702) through the medium-voltage direct-current DC (404) connected with the low-voltage direct-current bus, and the medium-voltage direct-current new energy power generation system (803) is formed by connecting the direct-current double-path power supply important load (601), the low-voltage direct-current load (701), the low-voltage direct-current power supply important load and the measurement and control power utilization equipment (702), The system comprises a medium-voltage direct-current electric load (602), a medium-voltage direct-current charging pile (603), a low-voltage direct-current load (701), and an electric power path for protecting and measuring and controlling the micro-grid and supplying power to electric equipment (702);
the medium-voltage direct-current energy storage DC/DC (403) is connected with a medium-voltage direct-current energy storage battery pack string (303) and is connected with a medium-voltage direct-current power bus (12), the medium-voltage direct-current power bus (12) is connected with a medium-voltage direct-current power load (602), meanwhile, the medium-voltage direct-current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct-current bus, the medium-voltage DC/DC (402) connected with a direct-current double-path power supply load is connected with a corresponding direct-current double-path power supply important load (601), the medium-voltage DC/DC (404) connected with the medium-voltage and low-voltage direct-current buses is connected with a low-voltage direct-current power bus (13), the low-voltage direct-current load (601), the micro-grid protection and double-path power equipment (702) are connected through the low-voltage direct-current and low-voltage direct-current buses, and a medium-voltage direct-current new-energy power generation system (803) is formed and can supply the direct-current important load (601), The system comprises a medium-voltage direct-current electric load (602), a medium-voltage direct-current charging pile (603), a low-voltage direct-current load (701), and an electric power path for protecting and measuring and controlling the micro-grid and supplying power to electric equipment (702);
the low-voltage energy storage DC/DC (401) of the direct-current double-path power supply load is connected with a low-voltage direct-current double-path power supply energy storage battery pack string (304) and is simultaneously connected with a direct-current double-path power supply important load (601) and a low-voltage direct-current power bus (13), the low-voltage direct-current power bus (13) is connected with a low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the low-voltage energy storage DC/DC (401) of the direct-current double-path power supply load;
the low-voltage direct-current new energy power generation system (804) is connected with a low-voltage direct-current power bus (13) through a low-voltage direct-current new energy power generation DC/DC (406), the low-voltage direct-current power bus (13) is connected with a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the low-voltage direct-current new energy power generation system (804);
the low-voltage direct-current energy storage battery pack string (305) is connected with a low-voltage direct-current power bus (13) through a low-voltage direct-current energy storage DC/DC (407), the low-voltage direct-current power bus (13) is connected with a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702), and an electric power path for supplying power to the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed.
An alternating current-direct current micro-grid system based on multi-power-supply electric fusion is characterized in that the alternating current and direct current multi-power path is characterized in that: the 1 st and middle high voltage AC power bus (3) is connected with the 2 nd and middle high voltage AC power bus (4) through a connecting electric control switch (9) between the middle and high voltage AC power buses, and is connected with the middle high voltage DC power bus (12) through a 3 rd transformer (103) and an inverter (202) connected with the middle and high voltage AC power bus and the middle high voltage DC power bus to form a power path between the 1 st and middle high voltage AC power bus (3) and the 2 nd and middle and high voltage AC power bus (4) and the middle high voltage DC power bus (12);
meanwhile, a 1 st middle and high voltage alternating current power bus (3) is connected with a 2 nd middle and high voltage alternating current power bus (4) through a connecting electric control switch (9) between the middle and high voltage alternating current power buses, and is connected with a low voltage alternating current power bus (7) through a 2 nd transformer (102), so that a power path between the 1 st middle and high voltage alternating current power bus (3) and the 2 nd middle and high voltage alternating current power bus (4) and the low voltage alternating current power bus (7) is formed;
the low-voltage alternating-current power bus (7) is connected with the low-voltage direct-current power bus (13) through an inverter (205) connected with the low-voltage alternating-current bus through the low-voltage direct-current bus to form a power path between the low-voltage alternating-current power bus (7) and the low-voltage direct-current power bus (13);
the medium-voltage direct-current power bus (12) is connected with the low-voltage direct-current power bus (13) through a DC/DC (404) which is used for connecting the medium-voltage direct-current bus with the low-voltage direct-current bus, and a power path between the medium-voltage direct-current power bus (12) and the low-voltage direct-current power bus (13) is formed.
The invention relates to an alternating current-direct current micro-grid system based on multi-power-supply power fusion, which realizes multi-voltage-level multi-power-path multi-power-supply power fusion operation and multi-path power guarantee of power loads by utilizing an innovative dynamic flexible system reconstruction technology, by dynamically adjusting and controlling a plurality of independent and controlled interconnected double-voltage-level alternating-current and direct-current micro-grids fused with multi-power supply in real time, the system provides effective guarantee for effectively stabilizing the fluctuation of new energy power, completing planned and unplanned switching of the multi-power supply and realizing seamless switching of the multi-power supply, greatly improves the stability and safety of system power supply, effectively solves the problem that in a certain power utilization area, the method is characterized in that power of a power grid, new energy distributed power, a self-contained power plant, an emergency power supply and the like needs to be fused with existing efficiency to operate and provide stable and reliable power for alternating current and direct current loads with different voltage levels; the method provides a solution for constructing the fusion of new energy distributed power, a rotor power supply and the existing power grid for increasingly expanded new energy distributed power application, and the AC/DC hybrid micro-grid system realizes safe, stable, economic and reliable AC/DC power supply, and is a technical trend of the fusion of new energy power, the power grid and the rotor power.

Claims (6)

1. An alternating current-direct current micro-grid system based on multi-power supply power fusion is characterized in that a 1 st power supply (1) and a 2 nd power supply (2) powered by two paths of power supplies form two independent and controlled interconnected double-voltage-level alternating current micro-grids through two sections of middle-high voltage alternating current power buses (3) and 2 nd-high voltage alternating current power buses (4), the two double-voltage-level alternating current micro-grids are connected with a double-voltage-level direct current micro-grid through an inverter (202) connected with the middle-high voltage direct current buses and an inverter (205) connected with the low-voltage alternating current buses and a low-voltage direct current bus respectively, and a micro-grid EMS main control system (15) is dynamically connected and controls each power device, load device and electric control switch through a communication network (8) to form a multi-power supply power fusion alternating current-direct current micro-direct current network control system, an AC and DC multi-power path is dynamically optimized and constructed by a micro-grid EMS master control system (15), and hierarchical power conservation and uninterrupted power supply are provided for a medium-high voltage AC power load (501), a low-voltage AC power load (502), a DC two-way power supply important load (601), a medium-voltage DC power load (602), a low-voltage DC load (701) and micro-grid protection and measurement and control electric equipment (702) according to set priorities, and quick charging power can be provided for an electric automobile through a medium-voltage DC charging pile (603).
2. The alternating current-direct current micro-grid system based on multi-power supply electric power fusion according to claim 1, wherein the two independent and controlled interconnected double-voltage-level alternating current micro-grids are characterized in that: the 1 st power supply (1) is connected with a 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is respectively connected with a medium-high voltage alternating current new energy power generation grid-connected system (801) and a medium-high voltage alternating current electric load (501), and a 2 nd transformer (102) is connected with a low-voltage level alternating current-direct current micro-grid which is formed by connecting low-voltage alternating current power buses (7) and has the double characteristics of power supply and load, so that two independent double-level alternating current-direct current micro-grids with different voltage levels based on the medium-high voltage alternating current buses are formed; meanwhile, a 2 nd power supply (2) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd medium-high voltage alternating current power bus (4) is respectively connected with a medium-high voltage alternating current rotor power generation system (901) accessed through a connection electric control switch (10) accessed to the medium-high voltage alternating current power bus by a rotor power generation system, a medium-high voltage energy storage system inverter (201) and a medium-high voltage alternating current energy storage battery pack string (301) are sequentially connected through a 1 st transformer (101), and an inverter (202) connected with the medium-high voltage direct current bus by a 3 rd transformer (103) and the medium-high voltage alternating current bus is connected by a medium-high voltage direct current power bus (12) to form a double-voltage level direct current micro-grid with the dual characteristics of power supply and load, so as to form another independent double-level alternating current and direct current micro-direct current grid based on two different voltage levels of the medium-high voltage alternating current bus, and a connection electric control switch (9) between the medium-high voltage alternating current power buses is connected with the 1 st medium-high voltage alternating current power bus (3) and the 2 nd medium-high voltage alternating current power bus (4) to form two independent and controlled interconnected double-voltage-level alternating current micro-grids.
3. The alternating current-direct current micro-grid system based on multi-power supply electric power fusion according to claim 1, wherein the alternating current-direct current micro-grid system is characterized in that: the micro-grid EMS master control system (15) is respectively connected with a 1 st power supply line electric control switch (5), a 2 nd power supply line electric control switch (6), a connection electric control switch (9) between medium and high voltage alternating current power buses, a connection electric control switch (10) of a rotor power generation system connected with a medium and high voltage alternating current power bus, a connection electric control switch (11) of a rotor power generation system connected with a low voltage alternating current power bus, an electric control switch (14) of a medium voltage direct current bus connected with a charging pile, a medium and high voltage energy storage system inverter (201), an inverter (202) of a medium and high voltage alternating current bus connected with a medium voltage direct current bus, an inverter (203) of a new energy generation connected with a low voltage alternating current bus, an energy storage inverter (204) of a low voltage alternating current bus, an inverter (205) of a low voltage direct current bus connected with a low voltage alternating current bus, a medium and high voltage alternating current energy storage battery string (301), The system comprises a low-voltage alternating-current energy storage battery pack string (302), a medium-voltage direct-current energy storage battery pack string (303), a low-voltage direct-current double-way power supply energy storage battery pack string (304), a low-voltage direct-current energy storage battery pack string (305), a low-voltage energy storage DC/DC (401) of a direct-current double-way power supply load, a medium-voltage DC/DC (402) of a direct-current double-way power supply load, a medium-voltage direct-current energy storage DC/DC (403), a DC/DC (404) connecting a medium-voltage bus and a low-voltage direct-current bus, a medium-voltage direct-current new energy power generation DC/DC (405), a low-voltage direct-current new energy power generation DC/DC (406), a low-voltage direct-current energy storage DC/DC (407), a medium-voltage alternating-current electric load (501), a low-voltage alternating-current electric load (502), a direct-current double-way power supply important load (601), a medium-voltage direct-current electric load (602), a medium-voltage direct-current direct current load (603), a low-voltage direct-current load (701), The system comprises a microgrid protection and measurement and control electric equipment (702), a medium-high voltage alternating current new energy power generation grid-connected system (801), a low-voltage alternating current new energy power generation system (802), a medium-voltage direct current new energy power generation system (803), a low-voltage direct current new energy power generation system (804), a medium-high voltage alternating current rotor power generation system (901) and a low-voltage alternating current rotor power generation system (902), and forms an energy management and control and operation measurement and control system of a multi-power-source power fusion alternating current and direct current microgrid system of an alternating current and direct current multi-microgrid framework.
4. The alternating current-direct current micro-grid system based on multi-power supply electric power fusion according to claim 1, wherein the double-voltage-level direct current micro-grid is characterized in that: the medium-voltage direct-current micro-grid is formed by connecting a medium-voltage direct-current power bus (12) with a medium-voltage direct-current power load (602) and connecting a medium-voltage DC/DC (402), a medium-voltage direct-current energy storage DC/DC (403), a medium-voltage direct-current new energy power generation DC/DC (405) of the direct-current double-path power supply load respectively through a medium-voltage DC/DC (402), a medium-voltage direct-current energy storage DC/DC (405), connecting a medium-voltage direct-current bus with a corresponding direct-current double-path power supply important load (601), a medium-voltage direct-current energy storage battery pack string (303), a medium-voltage direct-current new energy power generation system (803) and a direct-current charging pile (604) through an electric control switch (14) connected with the medium-voltage direct-current bus, and simultaneously connecting a low-voltage direct-current load (701), a micro-grid protection and measurement and control electrical equipment (702) and connecting a low-voltage direct-current double-path power supply energy storage battery pack string (304) through a low-voltage energy storage DC/DC (401) of the direct-current double-path power supply load respectively, The low-voltage direct-current micro-grid is formed by connecting a low-voltage direct-current new energy power generation system (804) through a low-voltage direct-current new energy power generation DC/DC (406) and connecting a low-voltage direct-current energy storage battery pack string (305) through a low-voltage direct-current energy storage DC/DC (407); and a DC/DC (404) for connecting the medium-voltage and low-voltage direct-current buses is connected with the medium-voltage direct-current power bus (12) and the low-voltage direct-current power bus (13) to form a double-voltage-level direct-current microgrid.
5. The alternating current-direct current micro-grid system based on multi-power supply power fusion according to claim 1, wherein the alternating current and direct current multi-power path is characterized in that: the 1 st power supply (1) is connected with the 1 st medium-high voltage alternating current power bus (3) through the 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with the medium-high voltage alternating current electric load (501), and a power path for supplying power to the medium-high voltage alternating current electric load (501) by the 1 st power supply (1) is formed;
the 1 st power supply (1) is connected with the 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with the low-voltage alternating current power bus (7) through a 2 nd transformer (102), and the low-voltage alternating current power bus (7) is connected with the low-voltage alternating current power load (502), so that a power path for supplying power to the low-voltage alternating current power load (502) by the 1 st power supply (1) is formed;
the 1 st power supply (1) is connected with a 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), an inverter (205) connected with the low-voltage alternating current bus through a low-voltage direct current bus and a low-voltage direct current bus (7) is connected with a low-voltage direct current power bus (13), the low-voltage direct current power bus (13) is connected with a direct current two-way power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the direct current two-way power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) by the 1 st power supply (1) is formed;
a 1 st power supply (1) is connected with a 1 st medium-high voltage alternating current power bus (3) through a 1 st power supply line electric control switch (5), the 1 st medium-high voltage alternating current power bus (3) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-high voltage direct current power bus (12) through a 3 rd transformer (103) and an inverter (202) connected with the medium-high voltage alternating current bus and the medium-high voltage direct current bus in sequence, and an electric power path for supplying power to an important load (601), a medium-voltage direct current power load charging pile (602) and a medium-voltage direct current bus (603) by the 1 st power supply (1) is formed;
the middle-high voltage alternating current new energy power generation grid-connected system (801) is connected with a 1 st middle-high voltage alternating current power bus (3), the 1 st middle-high voltage alternating current power bus (3) is connected with a middle-high voltage alternating current electric load (501), and a power path for supplying power to the middle-high voltage alternating current electric load (501) by the middle-high voltage alternating current new energy power generation grid-connected system (801) is formed;
the middle-high voltage alternating current new energy power generation grid-connected system (801) is connected with a 1 st middle-high voltage alternating current power bus (3), the 1 st middle-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), and a power path for supplying power to the low-voltage alternating current power load (502) by the middle-high voltage alternating current new energy power generation grid-connected system (801) is formed;
the middle-high voltage alternating current new energy power generation grid-connected system (801) is connected with a 1 st middle-high voltage alternating current power bus (3), the 1 st middle-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), an inverter (205) connected with the low-voltage alternating current bus through a low-voltage direct current bus and a low-voltage alternating current power bus (7) is connected with a low-voltage direct current power bus (13), and the low-voltage direct current power bus (13) is connected with a direct current two-way power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), so that a power path for supplying power to the direct current two-way power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the middle-high voltage alternating current new energy power generation grid-connected system (801);
the medium-high voltage AC new energy power generation grid-connected system (801) is connected with a 1 st medium-high voltage AC power bus (3), the 1 st medium-high voltage AC power bus (3) is connected with a 2 nd medium-high voltage AC power bus (4) through a connection electric control switch (9) between the medium-high voltage AC power buses, the 2 nd medium-high voltage AC power bus (4) is connected with a medium-voltage DC power bus (12) through a 3 rd transformer (103) and an inverter (202) with the medium-high voltage AC bus connected with the medium-high voltage DC bus in sequence, the medium-voltage DC power bus (12) is connected with a medium-voltage DC electric load (602), and meanwhile, the medium-voltage DC charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage DC bus, and a corresponding DC double-way power supply important load (601) is connected through a medium-voltage DC/DC (402) of the DC double-way power supply load, so that the medium-high voltage AC new energy power generation grid-high energy power system (801) is formed as the DC double-way power supply important load (601) A power path for supplying power to the medium-voltage direct-current electric load (602) and the medium-voltage direct-current charging pile (603);
a 2 nd power supply (2) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-voltage direct current power bus (12) through a 3 rd transformer (103) and an inverter (202) connected with the medium-high voltage alternating current bus and the medium-voltage direct current bus in sequence, the medium-voltage direct current power bus (12) is connected with a medium-voltage direct current electric load (602), a medium-voltage direct current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct current bus, and a corresponding direct current double-way power supply important load (601) is connected through a medium-voltage DC/DC (402) of the direct current double-way power supply load, a 2 nd power supply source (2) forms a power path for supplying power to a direct current double-path power supply important load (601), a medium-voltage direct current power load (602) and a medium-voltage direct current charging pile (603);
the 2 nd power supply (2) is connected with the 2 nd middle-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd middle-high voltage alternating current power bus (4) is connected with the 1 st middle-high voltage alternating current power bus (3) through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus (3) is connected with a middle-high voltage alternating current electric load (501), and a power path for supplying power to the middle-high voltage alternating current electric load (501) by the 2 nd power supply (2) is formed;
a 2 nd power supply (2) is connected with a 2 nd middle-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd middle-high voltage alternating current power bus (4) is connected with a 1 st middle-high voltage alternating current power bus (3) through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus (3) is connected with a low voltage alternating current power bus (7) through a 2 nd transformer (102), the low voltage alternating current power bus (7) is connected with a low voltage alternating current power load (502), and a power path for supplying power to the low voltage alternating current power load (502) by the 2 nd power supply (2) is formed;
the 2 nd power supply (2) is connected with the 2 nd middle-high voltage alternating current power bus (4) through a 2 nd power supply line electric control switch (6), the 2 nd middle-high voltage alternating current power bus (4) is connected with the 1 st middle-high voltage alternating current power bus (3) through a middle-high voltage alternating current power bus connection electric control switch (9), the 1 st middle-high voltage alternating current power bus (3) is connected with the low voltage alternating current power bus (7) through a 2 nd transformer (102), the low voltage alternating current power bus (7) is connected with an inverter (205) connected with the low voltage alternating current bus through the low voltage direct current bus, the low voltage direct current power bus (13) is connected with a direct current double-way power supply important load (601), a low voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and the 2 nd power supply (2) is formed by connecting the direct current double-way power supply important load (601), A power path for supplying power to a low-voltage direct-current load (701) and a microgrid protection and measurement and control electric device (702);
the medium-high voltage alternating current rotor power generation system (901) is connected with a 2 nd medium-high voltage alternating current power bus (4) through a connection electric control switch (10) of the rotor power generation system connected with the medium-high voltage alternating current power bus, the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-voltage direct current power bus (12) through a 3 rd transformer (103) and an inverter (202) of the medium-high voltage alternating current bus connected with the medium-voltage direct current bus in sequence, the medium-voltage direct current power bus (12) is connected with a medium-voltage direct current power load (602), meanwhile, the medium-voltage direct current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct current bus, and a corresponding direct current two-way power supply important load (601) is connected through a medium-voltage DC/DC (402) of the direct current two-way power supply load, so that the medium-high voltage alternating current rotor power generation system (901) is formed as a direct current two-way power supply important load (601), A power path for supplying power to the medium-voltage direct-current electric load (602) and the medium-voltage direct-current charging pile (603);
the middle-high voltage alternating current rotor power generation system (901) is connected with a middle-high voltage alternating current power bus (4) through a connection electric control switch (10) of the rotor power generation system connected to the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus (4) in the 2 nd is connected with a middle-high voltage alternating current power bus (3) in the 1 st through a connection electric control switch (9) between the middle-high voltage alternating current power buses, and the middle-high voltage alternating current power bus (3) in the 1 st is connected with a middle-high voltage alternating current electric load (501), so that an electric power path for supplying power to the middle-high voltage alternating current electric load (501) by the middle-high voltage alternating current rotor power generation system (901) is formed;
the middle-high voltage alternating current rotor power generation system (901) is connected with a middle-high voltage alternating current power bus (4) in a 2 nd through a connection electric control switch (10) of the rotor power generation system connected to the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus (4) in the 2 nd is connected with a middle-high voltage alternating current power bus (3) in a 1 st through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the middle-high voltage alternating current power bus (3) in the 1 st is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), and the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), so that a power path for supplying power to the low-voltage alternating current power load (502) by the middle-high voltage alternating current rotor power generation system (901) is formed;
the middle-high voltage alternating current rotor power generation system (901) is connected with a middle-high voltage alternating current power bus (4) through a connection electric control switch (10) of a rotor power generation system connected with the middle-high voltage alternating current power bus, the middle-high voltage alternating current power bus (4) in the 2 nd is connected with a middle-high voltage alternating current power bus (3) in the 1 st through a connection electric control switch (9) between the middle-high voltage alternating current power buses, the middle-high voltage alternating current power bus (3) in the 1 st is connected with a low voltage alternating current power bus (7) through a 2 nd transformer (102), an inverter (205) connected with the low voltage alternating current bus (7) through the low voltage direct current bus is connected with a low voltage direct current power bus (13), and the low voltage direct current power bus (13) is connected with a direct current double-way power supply important load (601), a low voltage direct current load (701) and a microgrid protection and measurement and control electric equipment (702), a power path for supplying power to a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and microgrid protection and measurement and control electric equipment (702) is formed by the medium-high voltage alternating-current rotor power generation system (901);
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 nd medium-high voltage alternating current power bus (4) is connected with a medium-high voltage direct current bus through a 3 rd transformer (103) and an inverter (202) connected with the medium-high voltage alternating current bus and the medium-high voltage direct current bus in sequence, the medium-high voltage direct current power bus (12) is connected with a medium-voltage direct current power load (602), the medium-voltage direct current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct current bus, and the corresponding direct current two-way power supply important load (601) is connected through a medium-voltage direct current/Direct Current (DC) of the direct current two-way power supply load, so that the medium-high voltage energy storage system inverter (201) is formed into the direct current two-way power supply important load (601), the medium-high voltage direct current two-way power supply load (602), A power path for supplying power to the medium-voltage direct-current charging pile (603);
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 nd medium-high voltage alternating current power bus (4) is connected with a 1 st medium-high voltage alternating current power bus (3) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus (3) is connected with a medium-high voltage alternating current electric load (501), and an electric power path for supplying power to the medium-high voltage alternating current electric load (501) by the medium-high voltage energy storage system inverter (201) is formed;
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 nd medium-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 nd medium-high voltage alternating current power bus (4) is connected with a 1 st medium-high voltage alternating current power bus (3) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 1 st medium-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through the 2 nd transformer (102), and the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), so that a power path for supplying power to the low-voltage alternating current power load (502) by the medium-high voltage energy storage system inverter (201) is formed;
the medium-high voltage energy storage system inverter (201) is connected with a medium-high voltage alternating current energy storage battery pack string (301) and is connected with a 2 middle-high voltage alternating current power bus (4) through a 1 st transformer (101), the 2 middle-high voltage alternating current power bus (4) is connected with a 1 st middle-high voltage alternating current power bus (3) through a connection electric control switch (9) between the medium-high voltage alternating current power buses, the 1 st middle-high voltage alternating current power bus (3) is connected with a low-voltage alternating current power bus (7) through a 2 nd transformer (102), the low-voltage direct current power bus (13) is connected with an inverter (205) connected with the low-voltage alternating current bus through the low-voltage direct current bus (7), the low-voltage direct current power bus (13) is connected with a direct current two-way power supply important load (601), a low-voltage direct current load (701) and a microgrid protection and measurement and control electric device (702), and the medium-high voltage energy storage system inverter (201) is formed to supply the direct current two-way power supply important load (601), high voltage alternating current load (601), A power path for supplying power to a low-voltage direct-current load (701) and a microgrid protection and measurement and control electric device (702);
an inverter (203) of the new energy power generation access low-voltage alternating current bus is connected with a low-voltage alternating current new energy power generation system (802) and connected into a low-voltage alternating current power bus (7), the low-voltage alternating current power bus (7) is connected with a low-voltage alternating current power load (502), and a power path for supplying power to the low-voltage alternating current power load (502) by the low-voltage alternating current new energy power generation system (802) is formed;
an inverter (203) of a new energy power generation access low-voltage alternating current bus is connected with a low-voltage alternating current new energy power generation system (802) and is connected with a low-voltage alternating current power bus (7), the inverter (205) connected with the low-voltage alternating current bus through the low-voltage alternating current power bus (7) is connected with a low-voltage direct current power bus (13), the low-voltage direct current power bus (13) is connected with a direct current double-path power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the low-voltage alternating current new energy power generation system (802) through the direct current double-path power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed;
the energy storage inverter (204) accessed by the low-voltage alternating current bus is connected with the low-voltage alternating current energy storage battery pack string (302) and is accessed into the low-voltage alternating current power bus (7), the low-voltage alternating current power bus (7) is connected with the low-voltage alternating current electric load (502), and an electric power path for supplying power to the low-voltage alternating current electric load (502) is formed by the energy storage inverter (204) accessed by the low-voltage alternating current bus;
an energy storage inverter (204) accessed by a low-voltage alternating current bus is connected with a low-voltage alternating current energy storage battery pack string (302) and is accessed into a low-voltage alternating current power bus (7), the low-voltage alternating current power bus (7) is connected with an inverter (205) connected with the low-voltage alternating current bus through the low-voltage direct current bus, the inverter (13) is connected with a low-voltage direct current power bus (13), the low-voltage direct current power bus (7) is connected with a direct current double-path power supply important load (601), a low-voltage direct current load (701) and microgrid protection and measurement and control electric equipment (702), and an electric power path for supplying power to the direct current double-path power supply important load (601), the low-voltage direct current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the energy storage inverter (204) accessed by the low-voltage alternating current bus;
the low-voltage alternating-current rotor power generation system (902) is connected with a low-voltage alternating-current power bus (7) through a connecting electric control switch (11) of the rotor power generation system connected with the low-voltage alternating-current power bus, and the low-voltage alternating-current power bus (7) is connected with a low-voltage alternating-current power load (502) to form a power path for supplying power to the low-voltage alternating-current power load (502) by the low-voltage alternating-current rotor power generation system (902);
the low-voltage alternating-current rotor power generation system (902) is connected with a low-voltage alternating-current power bus (7) through a connection electric control switch (11) of the rotor power generation system connected with the low-voltage alternating-current power bus, an inverter (205) connected with the low-voltage alternating-current bus through the low-voltage direct-current bus (7) is connected with a low-voltage direct-current power bus (13), the low-voltage direct-current power bus (13) is connected with a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and microgrid protection and measurement and control electric equipment (702), and an electric power path for supplying power to the low-voltage alternating-current rotor power generation system (902) for the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed;
the medium-voltage direct-current new energy power generation system (803) is connected to a medium-voltage direct-current power bus (12) through a medium-voltage direct-current new energy power generation DC/DC (405), the medium-voltage direct-current power bus (12) is connected with a medium-voltage direct-current power load (602), meanwhile, the medium-voltage direct-current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct-current bus, the medium-voltage DC/DC (402) connected with a direct-current double-path power supply load is connected with a corresponding direct-current double-path power supply important load (601), the medium-voltage direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control power utilization equipment (702) through the medium-voltage direct-current DC (404) connected with the low-voltage direct-current bus, and the medium-voltage direct-current new energy power generation system (803) is formed by connecting the direct-current double-path power supply important load (601), the low-voltage direct-current load (701), the low-voltage direct-current power supply important load and the measurement and control power utilization equipment (702), The system comprises a medium-voltage direct-current electric load (602), a medium-voltage direct-current charging pile (603), a low-voltage direct-current load (701), and an electric power path for protecting and measuring and controlling the micro-grid and supplying power to electric equipment (702);
the medium-voltage direct-current energy storage DC/DC (403) is connected with a medium-voltage direct-current energy storage battery pack string (303) and is connected with a medium-voltage direct-current power bus (12), the medium-voltage direct-current power bus (12) is connected with a medium-voltage direct-current power load (602), meanwhile, the medium-voltage direct-current charging pile (603) is connected with an electric control switch (14) connected with the charging pile through the medium-voltage direct-current bus, the medium-voltage DC/DC (402) connected with a direct-current double-path power supply load is connected with a corresponding direct-current double-path power supply important load (601), the medium-voltage DC/DC (404) connected with the medium-voltage and low-voltage direct-current buses is connected with a low-voltage direct-current power bus (13), the low-voltage direct-current load (601), the micro-grid protection and double-path power equipment (702) are connected through the low-voltage direct-current and low-voltage direct-current buses, and a medium-voltage direct-current new-energy power generation system (803) is formed and can supply the direct-current important load (601), The system comprises a medium-voltage direct-current electric load (602), a medium-voltage direct-current charging pile (603), a low-voltage direct-current load (701), and an electric power path for protecting and measuring and controlling the micro-grid and supplying power to electric equipment (702);
the low-voltage energy storage DC/DC (401) of the direct-current double-path power supply load is connected with a low-voltage direct-current double-path power supply energy storage battery pack string (304) and is simultaneously connected with a direct-current double-path power supply important load (601) and a low-voltage direct-current power bus (13), the low-voltage direct-current power bus (13) is connected with a low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the low-voltage energy storage DC/DC (401) of the direct-current double-path power supply load;
the low-voltage direct-current new energy power generation system (804) is connected with a low-voltage direct-current power bus (13) through a low-voltage direct-current new energy power generation DC/DC (406), the low-voltage direct-current power bus (13) is connected with a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and microgrid protection and measurement and control electric equipment (702), and a power path for supplying power to the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed by the low-voltage direct-current new energy power generation system (804);
the low-voltage direct-current energy storage battery pack string (305) is connected with a low-voltage direct-current power bus (13) through a low-voltage direct-current energy storage DC/DC (407), the low-voltage direct-current power bus (13) is connected with a direct-current double-path power supply important load (601), a low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702), and an electric power path for supplying power to the direct-current double-path power supply important load (601), the low-voltage direct-current load (701) and the microgrid protection and measurement and control electric equipment (702) is formed.
6. The alternating current-direct current micro-grid system based on multi-power supply power fusion according to claim 1, wherein the alternating current and direct current multi-power path is further characterized in that: the 1 st and middle high voltage AC power bus (3) is connected with the 2 nd and middle high voltage AC power bus (4) through a connecting electric control switch (9) between the middle and high voltage AC power buses, and is connected with the middle high voltage DC power bus (12) through a 3 rd transformer (103) and an inverter (202) connected with the middle and high voltage AC power bus and the middle high voltage DC power bus to form a power path between the 1 st and middle high voltage AC power bus (3) and the 2 nd and middle and high voltage AC power bus (4) and the middle high voltage DC power bus (12);
meanwhile, a 1 st middle and high voltage alternating current power bus (3) is connected with a 2 nd middle and high voltage alternating current power bus (4) through a connecting electric control switch (9) between the middle and high voltage alternating current power buses, and is connected with a low voltage alternating current power bus (7) through a 2 nd transformer (102), so that a power path between the 1 st middle and high voltage alternating current power bus (3) and the 2 nd middle and high voltage alternating current power bus (4) and the low voltage alternating current power bus (7) is formed;
the low-voltage alternating-current power bus (7) is connected with the low-voltage direct-current power bus (13) through an inverter (205) connected with the low-voltage alternating-current bus through the low-voltage direct-current bus to form a power path between the low-voltage alternating-current power bus (7) and the low-voltage direct-current power bus (13);
the medium-voltage direct-current power bus (12) is connected with the low-voltage direct-current power bus (13) through a DC/DC (404) which is used for connecting the medium-voltage direct-current bus with the low-voltage direct-current bus, and a power path between the medium-voltage direct-current power bus (12) and the low-voltage direct-current power bus (13) is formed.
CN202010379708.8A 2020-05-06 2020-05-06 Alternating current-direct current micro-grid system based on multi-power-supply electric power fusion Pending CN113629698A (en)

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