CN111799840A - Off-grid and grid-connected integrated power supply control method and system - Google Patents
Off-grid and grid-connected integrated power supply control method and system Download PDFInfo
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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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
- H02J3/28—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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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
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- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
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- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention belongs to the technical field of power control, and discloses a method and a system for controlling an off-grid and grid-connected integrated power supply, wherein the system for controlling the off-grid and grid-connected integrated power supply comprises the following steps: the system comprises an electric energy acquisition module, a diesel power generation acquisition module, a wind power generation acquisition module, a photovoltaic power generation acquisition module, an electromagnetic switch control module, a central processing module, a wireless communication module, a remote terminal, a power generation module, a signal conversion module, an energy management module and an electric quantity data analysis module. The invention can realize the integrated operation of the internal power supply and the load, and meet the requirements of users on the access of the distributed power supply, the power quality, the power supply reliability and the safety. The invention can not only carry out high-efficiency conversion on each input energy source on the premise of keeping the stability of the power grid, but also ensure the preferential and high-efficiency use of renewable energy sources by the intelligent distributed control management system, reduce the consumption of fuel to the maximum extent and ensure the stable, safe and reliable operation and energy supply of the whole system.
Description
Technical Field
The invention belongs to the technical field of power control, and particularly relates to a method and a system for controlling an off-grid and grid-connected integrated power supply.
Background
At present, electricity used by residents is basically supplied by a mains supply power grid, and in remote areas, such as mountain areas, once the damage of the power grid system or natural disasters damage the power grid system, the electricity consumption of the residents is interfered, the electricity can be recovered the next day if the situation is lighter, the electricity can be cut off for multiple days if the situation is serious, and great inconvenience is caused to the lives of the residents.
Market research and analysis show that most of power supply systems used by the communication base station are mains supply provided by a power grid, and power is supplied to the communication module after rectification and DC/DC conversion. However, such a power supply system has a problem in the long term. Firstly, for a communication base station in a remote area, the instability of mains supply means that the load cannot be continuously supplied due to frequent power failure, so that the communication faces a discontinuous situation and good communication service cannot be provided; secondly, if the commercial power is cut off for a long time, maintenance personnel are required to carry the battery or the generator to a remote area for rush repair, and communication is recovered, so that the labor cost is greatly consumed; and thirdly, along with the gradual increase of the energy conservation and emission reduction strength, the energy conservation and emission reduction of the communication base station is more and more emphasized, and the photovoltaic power supply system can play an important role. Therefore, a photovoltaic off-grid and grid-connected power supply system for a communication base station becomes a common solution.
In a photovoltaic off-grid and grid-connected power supply system for a current communication base station, two sets of equipment are generally used for off-grid and grid-connected respectively. When in grid connection, a grid-connected inverter is used and connected with commercial power, and a power supply is switched on and off to supply loads; and when the grid is disconnected, the grid-connected inverter and the commercial power are disconnected by using the off-grid inverter, and the photovoltaic and the switching power supply are connected by using the off-grid inverter only. The power supply system in the mode has higher requirement on equipment cost, and meanwhile, because the service time difference between the off-grid inverter and the grid-connected inverter is quite different, the service lives of the two inverters are also quite different, the replacement periods are different, and the inconvenience of maintenance is caused.
Through the above analysis, the problems and defects of the prior art are as follows: the existing power supply system cannot realize the integrated operation of an internal power supply and a load, and the existing energy supply can only be singly relied on, cannot realize the diversified supply of energy, is unstable and is not easy to maintain.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method and a system for controlling an off-grid and grid-connected integrated power supply.
The invention is realized in such a way, and provides a control method and a system for an off-grid and grid-connected integrated power supply, wherein the control method for the off-grid and grid-connected integrated power supply comprises the following steps:
the method comprises the following steps that firstly, an electric energy acquisition module is used for detecting voltage and current data in a power supply by utilizing voltage and current sensors; the diesel power generation acquisition module detects the running state of diesel power generation by using a speed sensor in the process of diesel power generation by using a diesel generator;
step two, the wind power generation acquisition module utilizes a wind power generator to generate wind power and utilizes a wind speed sensor to detect the state of wind power; the photovoltaic power generation acquisition module performs photovoltaic power generation by using a solar array and detects the illumination intensity of solar energy by using an illumination sensor;
step three, according to the data detected in the step one and the step two, the central processing module respectively controls the normal operation of each module of the electric energy acquisition module, the diesel power generation acquisition module, the wind power generation acquisition module, the photovoltaic power generation acquisition module, the electromagnetic switch control module, the wireless communication module, the power generation module, the signal conversion module, the energy management module and the electric quantity data analysis module;
step four, when the signal conversion module detects the state of each power generation module, the detected data is converted into data information which is easy to identify by a system; the energy management module is used for managing electric energy load and electric energy quality and carrying out coordination control on the energy management module and a main power grid; the electric quantity data analysis module provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module;
fifthly, according to the judgment result, the central processing module controls the power generation module to control the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system; the energy management module is used for managing the electric energy load and the electric energy quality and carrying out coordination control on the energy management module and the main power grid;
step six, the electromagnetic switch control module realizes the connection between the power supply and each power generation module through the electromagnetic switch according to the generated energy condition of each module and the state of the power supply;
step seven, the wireless communication module realizes the communication monitoring of the micro-grid by being provided with a wireless signal transmitting device; the remote terminal is connected with the wireless signal transmitting device through the remote terminal and used for remote monitoring and control;
the method for fusing the data collected in the electric energy collection module, the diesel power generation collection module, the wind power generation collection module and the photovoltaic power generation collection module by the central processing module comprises the following steps:
establishing data fusion and training samples according to data detected by sensors in an electric energy acquisition module, a diesel power generation acquisition module, a wind power generation acquisition module and a photovoltaic power generation acquisition module;
extracting and changing feature values according to data in the data fusion training sample, and establishing corresponding feature vectors;
identifying the characteristic vector through a self-adaptive neural network, carrying out target description and establishing relevance;
and synthesizing the data of each sensor of each target through a fusion algorithm to obtain the consistency explanation and description of the target.
Further, the method for managing the electric energy load and the electric energy quality in the energy management module comprises the following steps:
(1) acquiring related electric energy information, load information and required power utilization conditions stored in an energy storage battery pack and a quick switch cabinet; carrying out load analysis and load data subdivision on the acquired information;
(2) summarizing and analyzing the time series historical data of each aggregation object according to the subdivision result, constructing different prediction models, and predicting future power load data based on the historical power consumption data, the real-time power load data and the influence factors;
(3) and after a load prediction result is obtained, comparing the load data of the load management regulation and control scheme with the real-time data by combining the production plan and the power load use condition, and finishing feedback correction.
Further, the performing of the power load and power quality management by using the central controller further includes: and preferentially allocating the wind power electric energy and the photovoltaic electric energy stored in the energy storage battery pack, and distributing the diesel electric energy when the wind power electric energy and the photovoltaic electric energy are insufficient.
Further, a method for controlling microgrid communication through a microgrid communication manager in the wireless communication module includes:
1) receiving corresponding communication data, and repackaging and protocol converting the received data; caching the converted communication data;
2) carrying out format conversion on the cached data; carrying out forwarding control and detection on the data protocol; controlling data and managing the power supply of the core peripheral circuit of each circuit board card;
3) and sending the data after storage, format conversion, protocol forwarding and detection to each device.
Further, the detecting includes: detecting whether the protocol forwarding control CPU and each circuit board card have conditions for communication; and detecting the state of the data.
Further, the method for clustering data by the central processing module includes:
establishing a data clustering center for the collected data and the operating data of each module in the whole system;
determining N classification centers as clustering centers in the data clustering centers;
calculating the clustering of the classified data and the clustering centers according to a distance formula, and dividing the data to the nearest clustering centers;
and repeating the steps continuously until the position of the centroid is not changed or the set iteration number is reached.
Another object of the present invention is to provide an off-grid and grid-connected integrated power control system for implementing the off-grid and grid-connected integrated power control method, including:
the electric energy acquisition module is connected with the central processing module and is used for detecting voltage and current data in the power supply by utilizing the voltage and current sensors;
the diesel power generation acquisition module is connected with the central processing module, and detects the running state of diesel power generation by using the speed sensor in the diesel power generation process by using the diesel generator;
the wind power generation acquisition module is connected with the central processing module, generates power by utilizing wind power generated by a wind power generator, and detects the state of wind power by utilizing a wind speed sensor;
the photovoltaic power generation acquisition module is connected with the central processing module, performs photovoltaic power generation by using a solar array, and detects the illumination intensity of solar energy by using an illumination sensor;
the electromagnetic switch control module is connected with the central processing module and realizes the connection between the power supply and each power generation module through an electromagnetic switch according to the generated energy condition of each module and the state of the power supply;
the central processing module is respectively connected with the electric energy acquisition module, the diesel power generation acquisition module, the wind power generation acquisition module, the photovoltaic power generation acquisition module, the electromagnetic switch control module, the wireless communication module, the power generation module, the signal conversion module, the energy management module and the electric quantity data analysis module, and coordinates normal operation of each module; establishing a data clustering center for the collected data and the operating data of each module in the whole system; determining N classification centers as clustering centers in the data clustering centers; calculating the clustering of the classified data and the clustering centers according to a distance formula, and dividing the data to the nearest clustering centers; continuously repeating the steps until the position of the mass center is not changed or the set iteration times are reached;
the wireless communication module is connected with the central processing module and is provided with a wireless signal transmitting device to realize micro-grid communication monitoring; receiving corresponding communication data, and repackaging and protocol converting the received data; caching the converted communication data; carrying out format conversion on the cached data; carrying out forwarding control and detection on the data protocol; controlling data and managing the power supply of the core peripheral circuit of each circuit board card; transmitting the data after storage, format conversion, protocol forwarding and detection to each device;
and the remote terminal is connected with the wireless communication module, is connected with the wireless signal transmitting device through the remote terminal and is used for remote monitoring and control.
Further, the off-grid and grid-connected integrated power control system further comprises:
the power generation module is connected with the central processing module and controls the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system;
the signal conversion module is connected with the central processing module and converts the detected data into data information which is easily recognized by a system when the state of each power generation module is detected;
the energy management module is connected with the central processing module, is used for carrying out electric energy load and electric energy quality management and is coordinated with the main power grid for control; acquiring related electric energy information, load information and required power utilization conditions stored in an energy storage battery pack and a quick switch cabinet; carrying out load analysis and load data subdivision on the acquired information; summarizing and analyzing the time series historical data of each aggregation object according to the subdivision result, constructing different prediction models, and predicting future power load data based on the historical power consumption data, the real-time power load data and the influence factors; after a load prediction result is obtained, comparing load data of a load management regulation and control scheme with real-time data by combining a production plan and the use condition of an electric load, and finishing feedback correction;
and the electric quantity data analysis module is connected with the central processing module and provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module.
Further, the off-grid and grid-connected integrated power control system comprises: the system comprises a diesel generator, a solar array, a wind driven generator, a quick switch cabinet, a photovoltaic converter, a wind power converter, a transformer, an energy storage converter, a direct current converter, an energy storage battery pack, a power distribution cabinet, a central controller, a micro-grid communication manager and a monitoring workstation;
the diesel generator is connected with the quick switch cabinet and used for generating diesel power;
the solar energy square matrix is connected with the photovoltaic converter and used for photovoltaic power generation;
and the wind power generator is connected with the wind power converter and is used for generating wind power.
Furthermore, the fast switch cabinet, the photovoltaic converter and the wind power converter are connected with an energy storage converter, and the energy storage converter is connected with a direct current converter, a power distribution cabinet and a central controller; the central controller is connected with the quick switch cabinet and the micro-grid communication management machine, and the micro-grid communication management machine is connected with the monitoring workstation.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention uses the voltage and current sensors to detect the voltage and current data in the power supply through the electric energy acquisition module. The diesel power generation acquisition module detects the running state of diesel power generation by using the speed sensor in the process of diesel power generation by using the diesel generator. The wind power generation acquisition module utilizes a wind power generator to generate power by wind energy and utilizes a wind speed sensor to detect the state of the wind energy. The photovoltaic power generation acquisition module performs photovoltaic power generation by using a solar array, and the illumination sensor is used for detecting the illumination intensity of solar energy. And the electromagnetic switch control module realizes the connection between the power supply and each power generation module through the electromagnetic switch according to the generated energy condition of each module and the state of the power supply. The wireless communication module realizes micro-grid communication monitoring by being provided with a wireless signal transmitting device. The remote terminal is connected with the wireless signal transmitting device through the remote terminal and used for remote monitoring and control. The power generation module controls the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system. And when the signal conversion module detects the state of each power generation module, the detected data is converted into data information which is easy to identify by a system. The energy management module is used for managing electric energy load and electric energy quality and carrying out coordination control on the energy management module and a main power grid; and the electric quantity data analysis module provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module. In addition, the wind, light and diesel storage system is adopted for independent power supply; the modularized double backup design is high in reliability, easy to maintain and expand; intelligent load grading management, wisdom, controllable, energy-conservation. The invention is based on the distributed power generation technology, realizes a small-sized modularized and distributed functional network for managing the power load and the power quality at the user side, can realize the integrated operation of an internal power supply and the load, can be smoothly connected into a main network or independently and autonomously operated through the coordination control with a main power network, and meets the requirements of users on the access of the distributed power supply, the power quality, the power supply reliability and the safety. The invention can not only carry out high-efficiency conversion on each input energy on the premise of keeping the stability of the power grid, but also ensure the preferential and high-efficiency use of renewable energy by the intelligent distributed control management system, reduce the consumption of fuel to the maximum extent (particularly suitable for remote/off-grid areas), and ensure the stable, safe and reliable operation and energy supply of the whole system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an off-grid and grid-connected integrated power management system according to an embodiment of the present invention;
in the figure: 1. an electric energy acquisition module; 2. a diesel generation collection module; 3. a wind power generation collection module; 4. a photovoltaic power generation collection module; 5. an electromagnetic switch control module; 6. a central processing module; 7. a wireless communication module; 8. a remote terminal; 9. a power generation module; 10. a signal conversion module; 11. an energy management module; 12. electric quantity data analysis module.
Fig. 2 is a flowchart of a method for controlling an off-grid and grid-connected integrated power supply according to an embodiment of the present invention.
Fig. 3 is a flowchart of a method for managing power load and power quality in an energy management module according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for controlling microgrid communication through a microgrid communication manager in a wireless communication module according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method for clustering data by a central processing module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a method and a system for controlling an off-grid and grid-connected integrated power supply, and the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the off-grid and grid-connected integrated power control system provided in the embodiment of the present invention includes:
and the electric energy acquisition module 1 is connected with the central processing module 6 and is used for detecting voltage and current data in the power supply by utilizing voltage and current sensors.
The diesel power generation acquisition module 2 is connected with the central processing module 6, and detects the running state of diesel power generation by using a speed sensor in the process of diesel power generation by using a diesel generator.
The wind power generation acquisition module 3 is connected with the central processing module 6, and is used for generating power by utilizing wind power generated by a wind power generator and detecting the state of wind power by utilizing a wind speed sensor.
And the photovoltaic power generation acquisition module 4 is connected with the central processing module 6, performs photovoltaic power generation by using a solar array, and detects the illumination intensity of solar energy by using an illumination sensor.
And the electromagnetic switch control module 5 is connected with the central processing module 6, and realizes the connection between the power supply and each power generation module through an electromagnetic switch according to the generated energy condition of each module and the state of the power supply.
And the central processing module 6 is respectively connected with the electric energy acquisition module 1, the diesel power generation acquisition module 2, the wind power generation acquisition module 3, the photovoltaic power generation acquisition module 4, the electromagnetic switch control module 5, the wireless communication module 7, the power generation module 9, the signal conversion module 10, the energy management module 11 and the electric quantity data analysis module 12, and coordinates normal operation of the modules.
And the wireless communication module 7 is connected with the central processing module 6 and is provided with a wireless signal transmitting device to realize micro-grid communication monitoring.
And the remote terminal 8 is connected with the wireless communication module 7, is connected with the wireless signal transmitting device through the remote terminal and is used for remote monitoring and control.
And the power generation module 9 is connected with the central processing module 6 and controls the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system.
And the signal conversion module 10 is connected with the central processing module 6 and converts the detected data into data information which is easy to identify by a system when the state of each power generation module is detected.
The energy management module 11 is connected with the central processing module 6, is used for carrying out electric energy load and electric energy quality management, and is coordinated with the main power grid for control;
and the electric quantity data analysis module 12 is connected with the central processing module 6 and provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module.
As shown in fig. 2, the off-grid and grid-connected integrated power supply control method provided in the embodiment of the present invention includes:
s101: the electric energy acquisition module is used for detecting voltage and current data in the power supply by utilizing the voltage and current sensors; the diesel power generation acquisition module detects the running state of diesel power generation by using the speed sensor in the process of diesel power generation by using the diesel generator.
S102: the wind power generation acquisition module is used for generating power by utilizing wind power generated by a wind driven generator and detecting the state of wind energy by utilizing a wind speed sensor; the photovoltaic power generation acquisition module performs photovoltaic power generation by using a solar array, and the illumination sensor is used for detecting the illumination intensity of solar energy.
S103: according to the data detected in S101 and S102, the central processing module respectively controls the normal operation of each module of the electric energy acquisition module, the diesel power generation acquisition module, the wind power generation acquisition module, the photovoltaic power generation acquisition module, the electromagnetic switch control module, the wireless communication module, the power generation module, the signal conversion module, the energy management module and the electric quantity data analysis module.
S104: when the signal conversion module detects the state of each power generation module, the detected data is converted into data information which is easy to identify by a system; the energy management module is used for managing electric energy load and electric energy quality and carrying out coordination control on the energy management module and a main power grid; and the electric quantity data analysis module provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module.
S105: according to the judgment result, the central processing module controls the power generation module to control the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system; the energy management module is used for managing the electric energy load and the electric energy quality and carrying out coordination control on the energy management module and the main power grid.
S106: and the electromagnetic switch control module realizes the connection between the power supply and each power generation module through the electromagnetic switch according to the generated energy condition of each module and the state of the power supply.
S107: the wireless communication module is provided with a wireless signal transmitting device to realize micro-grid communication monitoring; the remote terminal is connected with the wireless signal transmitting device through the remote terminal and used for remote monitoring and control.
The method for managing the electric energy load and the electric energy quality in the energy management module provided by the embodiment of the invention comprises the following steps:
s201: acquiring related electric energy information, load information and required power utilization conditions stored in an energy storage battery pack and a quick switch cabinet; carrying out load analysis and load data subdivision on the acquired information;
s202: summarizing and analyzing the time series historical data of each aggregation object according to the subdivision result, constructing different prediction models, and predicting future power load data based on the historical power consumption data, the real-time power load data and the influence factors;
s203: and after a load prediction result is obtained, comparing the load data of the load management regulation and control scheme with the real-time data by combining the production plan and the power load use condition, and finishing feedback correction.
The method for managing the electric energy load and the electric energy quality by using the central controller provided by the embodiment of the invention further comprises the following steps: and preferentially allocating the wind power electric energy and the photovoltaic electric energy stored in the energy storage battery pack, and distributing the diesel electric energy when the wind power electric energy and the photovoltaic electric energy are insufficient.
The method for controlling microgrid communication through a microgrid communication manager in the wireless communication module provided by the embodiment of the invention comprises the following steps:
s301: receiving corresponding communication data, and repackaging and protocol converting the received data; caching the converted communication data;
s302: carrying out format conversion on the cached data; carrying out forwarding control and detection on the data protocol; controlling data and managing the power supply of the core peripheral circuit of each circuit board card;
s303: and sending the data after storage, format conversion, protocol forwarding and detection to each device.
The detection comprises the following steps: detecting whether the protocol forwarding control CPU and each circuit board card have conditions for communication; and detecting the state of the data.
The method for clustering data by using the central processing module provided by the embodiment of the invention comprises the following steps:
s401: establishing a data clustering center for the collected data and the operating data of each module in the whole system;
s402: determining N classification centers as clustering centers in the data clustering centers;
s403: calculating the clustering of the classified data and the clustering centers according to a distance formula, and dividing the data to the nearest clustering centers;
s404: and repeating the steps continuously until the position of the centroid is not changed or the set iteration number is reached.
The method for fusing the data collected by the electric energy collection module, the diesel power generation collection module, the wind power generation collection module and the photovoltaic power generation collection module by the central processing module provided by the embodiment of the invention comprises the following steps:
establishing data fusion and training samples according to data detected by sensors in an electric energy acquisition module, a diesel power generation acquisition module, a wind power generation acquisition module and a photovoltaic power generation acquisition module;
extracting and changing feature values according to data in the data fusion training sample, and establishing corresponding feature vectors;
identifying the characteristic vector through a self-adaptive neural network, carrying out target description and establishing relevance;
and synthesizing the data of each sensor of each target through a fusion algorithm to obtain the consistency explanation and description of the target.
The off-grid and grid-connected integrated power supply control system hardware device provided by the embodiment of the invention comprises the following hardware devices:
the system comprises a diesel generator, a solar array, a wind driven generator, a quick switch cabinet, a photovoltaic converter, a wind power converter, a transformer, an energy storage converter, a direct current converter, an energy storage battery pack, a power distribution cabinet, a central controller, a micro-grid communication manager and a monitoring workstation;
the diesel generator is connected with the quick switch cabinet and used for generating diesel power;
the solar energy square matrix is connected with the photovoltaic converter and used for photovoltaic power generation;
the wind power generator is connected with the wind power converter and used for generating wind power;
the rapid switch cabinet, the photovoltaic converter and the wind power converter are connected with an energy storage converter, and the energy storage converter is connected with a direct current converter, a power distribution cabinet and a central controller; the central controller is connected with the quick switch cabinet and the micro-grid communication management machine, and the micro-grid communication management machine is connected with the monitoring workstation.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. A grid-off and grid-connected integrated power supply control method is characterized by comprising the following steps:
the method comprises the following steps that firstly, an electric energy acquisition module is used for detecting voltage and current data in a power supply by utilizing voltage and current sensors; the diesel power generation acquisition module detects the running state of diesel power generation by using a speed sensor in the process of diesel power generation by using a diesel generator;
step two, the wind power generation acquisition module utilizes a wind power generator to generate wind power and utilizes a wind speed sensor to detect the state of wind power; the photovoltaic power generation acquisition module performs photovoltaic power generation by using a solar array and detects the illumination intensity of solar energy by using an illumination sensor;
step three, according to the data detected in the step one and the step two, the central processing module respectively controls the normal operation of each module of the electric energy acquisition module, the diesel power generation acquisition module, the wind power generation acquisition module, the photovoltaic power generation acquisition module, the electromagnetic switch control module, the wireless communication module, the power generation module, the signal conversion module, the energy management module and the electric quantity data analysis module;
step four, when the signal conversion module detects the state of each power generation module, the detected data is converted into data information which is easy to identify by a system; the energy management module is used for managing electric energy load and electric energy quality and carrying out coordination control on the energy management module and a main power grid; the electric quantity data analysis module provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module;
fifthly, according to the judgment result, the central processing module controls the power generation module to control the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system; the energy management module is used for managing the electric energy load and the electric energy quality and carrying out coordination control on the energy management module and the main power grid;
step six, the electromagnetic switch control module realizes the connection between the power supply and each power generation module through the electromagnetic switch according to the generated energy condition of each module and the state of the power supply;
step seven, the wireless communication module realizes the communication monitoring of the micro-grid by being provided with a wireless signal transmitting device; the remote terminal is connected with the wireless signal transmitting device through the remote terminal and used for remote monitoring and control;
the method for fusing the data collected in the electric energy collection module, the diesel power generation collection module, the wind power generation collection module and the photovoltaic power generation collection module by the central processing module comprises the following steps:
establishing data fusion and training samples according to data detected by sensors in an electric energy acquisition module, a diesel power generation acquisition module, a wind power generation acquisition module and a photovoltaic power generation acquisition module;
extracting and changing feature values according to data in the data fusion training sample, and establishing corresponding feature vectors;
identifying the characteristic vector through a self-adaptive neural network, carrying out target description and establishing relevance;
and synthesizing the data of each sensor of each target through a fusion algorithm to obtain the consistency explanation and description of the target.
2. The off-grid and grid-connected integrated power supply control method according to claim 1, wherein the method for managing the electric energy load and the electric energy quality of the power supply in the energy management module comprises the following steps:
(1) acquiring related electric energy information, load information and required power utilization conditions stored in an energy storage battery pack and a quick switch cabinet; carrying out load analysis and load data subdivision on the acquired information;
(2) summarizing and analyzing the time series historical data of each aggregation object according to the subdivision result, constructing different prediction models, and predicting future power load data based on the historical power consumption data, the real-time power load data and the influence factors;
(3) and after a load prediction result is obtained, comparing the load data of the load management regulation and control scheme with the real-time data by combining the production plan and the power load use condition, and finishing feedback correction.
3. The grid-disconnected and integrated power control method according to claim 2, wherein the performing of power load and power quality management by using the central controller further comprises: and preferentially allocating the wind power electric energy and the photovoltaic electric energy stored in the energy storage battery pack, and distributing the diesel electric energy when the wind power electric energy and the photovoltaic electric energy are insufficient.
4. The off-grid and grid-connected integrated power control method of claim 1, wherein the method for performing microgrid communication control in the wireless communication module through a microgrid communication manager comprises the following steps:
1) receiving corresponding communication data, and repackaging and protocol converting the received data; caching the converted communication data;
2) carrying out format conversion on the cached data; carrying out forwarding control and detection on the data protocol; controlling data and managing the power supply of the core peripheral circuit of each circuit board card;
3) and sending the data after storage, format conversion, protocol forwarding and detection to each device.
5. The grid-disconnection-and-connection integrated power supply control method according to claim 4, wherein the detection comprises: detecting whether the protocol forwarding control CPU and each circuit board card have conditions for communication; and detecting the state of the data.
6. The off-grid and grid-connected integrated power control method of claim 1, wherein the method for clustering data by the central processing module comprises the following steps:
establishing a data clustering center for the collected data and the operating data of each module in the whole system;
determining N classification centers as clustering centers in the data clustering centers;
calculating the clustering of the classified data and the clustering centers according to a distance formula, and dividing the data to the nearest clustering centers;
and repeating the steps continuously until the position of the centroid is not changed or the set iteration number is reached.
7. An off-grid and grid-connected integrated power supply control system for implementing the off-grid and grid-connected integrated power supply control method according to any one of claims 1 to 6, wherein the off-grid and grid-connected integrated power supply control system comprises:
the electric energy acquisition module is connected with the central processing module and is used for detecting voltage and current data in the power supply by utilizing the voltage and current sensors;
the diesel power generation acquisition module is connected with the central processing module, and detects the running state of diesel power generation by using the speed sensor in the diesel power generation process by using the diesel generator;
the wind power generation acquisition module is connected with the central processing module, generates power by utilizing wind power generated by a wind power generator, and detects the state of wind power by utilizing a wind speed sensor;
the photovoltaic power generation acquisition module is connected with the central processing module, performs photovoltaic power generation by using a solar array, and detects the illumination intensity of solar energy by using an illumination sensor;
the electromagnetic switch control module is connected with the central processing module and realizes the connection between the power supply and each power generation module through an electromagnetic switch according to the generated energy condition of each module and the state of the power supply;
the central processing module is respectively connected with the electric energy acquisition module, the diesel power generation acquisition module, the wind power generation acquisition module, the photovoltaic power generation acquisition module, the electromagnetic switch control module, the wireless communication module, the power generation module, the signal conversion module, the energy management module and the electric quantity data analysis module, and coordinates normal operation of each module; establishing a data clustering center for the collected data and the operating data of each module in the whole system; determining N classification centers as clustering centers in the data clustering centers; calculating the clustering of the classified data and the clustering centers according to a distance formula, and dividing the data to the nearest clustering centers; continuously repeating the steps until the position of the mass center is not changed or the set iteration times are reached;
the wireless communication module is connected with the central processing module and is provided with a wireless signal transmitting device to realize micro-grid communication monitoring; receiving corresponding communication data, and repackaging and protocol converting the received data; caching the converted communication data; carrying out format conversion on the cached data; carrying out forwarding control and detection on the data protocol; controlling data and managing the power supply of the core peripheral circuit of each circuit board card; transmitting the data after storage, format conversion, protocol forwarding and detection to each device;
and the remote terminal is connected with the wireless communication module, is connected with the wireless signal transmitting device through the remote terminal and is used for remote monitoring and control.
8. The grid-disconnection-and-connection-integrated power control system according to claim 7, further comprising:
the power generation module is connected with the central processing module and controls the power generation states of the diesel power generation module, the wind power generation module and the photovoltaic power generation module according to the data of the system;
the signal conversion module is connected with the central processing module and converts the detected data into data information which is easily recognized by a system when the state of each power generation module is detected;
the energy management module is connected with the central processing module, is used for carrying out electric energy load and electric energy quality management and is coordinated with the main power grid for control; acquiring related electric energy information, load information and required power utilization conditions stored in an energy storage battery pack and a quick switch cabinet; carrying out load analysis and load data subdivision on the acquired information; summarizing and analyzing the time series historical data of each aggregation object according to the subdivision result, constructing different prediction models, and predicting future power load data based on the historical power consumption data, the real-time power load data and the influence factors; after a load prediction result is obtained, comparing load data of a load management regulation and control scheme with real-time data by combining a production plan and the use condition of an electric load, and finishing feedback correction;
and the electric quantity data analysis module is connected with the central processing module and provides a corresponding judgment result for the coordination control with the main power grid according to the electric quantity condition in the power supply and the generated energy in the power generation module.
9. The grid-disconnection-and-connection-integrated power control system according to claim 7, comprising: the system comprises a diesel generator, a solar array, a wind driven generator, a quick switch cabinet, a photovoltaic converter, a wind power converter, a transformer, an energy storage converter, a direct current converter, an energy storage battery pack, a power distribution cabinet, a central controller, a micro-grid communication manager and a monitoring workstation;
the diesel generator is connected with the quick switch cabinet and used for generating diesel power;
the solar energy square matrix is connected with the photovoltaic converter and used for photovoltaic power generation;
and the wind power generator is connected with the wind power converter and is used for generating wind power.
10. The off-grid and grid-connected integrated power control system according to claim 9, wherein the fast switch cabinet, the photovoltaic converter and the wind power converter are connected with an energy storage converter, and the energy storage converter is connected with a direct current converter, a power distribution cabinet and a central controller; the central controller is connected with the quick switch cabinet and the micro-grid communication management machine, and the micro-grid communication management machine is connected with the monitoring workstation.
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