CN116264416A - Novel intelligent platform area and operation control method thereof - Google Patents
Novel intelligent platform area and operation control method thereof Download PDFInfo
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- CN116264416A CN116264416A CN202211253923.9A CN202211253923A CN116264416A CN 116264416 A CN116264416 A CN 116264416A CN 202211253923 A CN202211253923 A CN 202211253923A CN 116264416 A CN116264416 A CN 116264416A
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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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00007—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 the power network as support for the 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
- 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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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
- H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution 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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/58—The condition being electrical
- H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
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Abstract
The invention discloses a novel intelligent transformer area, which comprises a transformer area transformer, wherein the output end of the transformer area transformer is connected with an intelligent distribution transformer terminal TTU and then is connected with an alternating current bus, the output end of an alternating current distributed power supply is connected with a remote sampling unit RTU and then is connected with the alternating current bus, a direct current load, a direct current charging pile and a direct current distributed power supply are connected in parallel through the direct current bus and then are connected with a flexible interconnection device SOP, the alternating current side of the flexible interconnection device SOP is connected with the remote sampling unit RTU and then is connected with the alternating current bus, and the node load is sequentially connected with an intelligent switch and the remote sampling unit RTU and then is connected with the alternating current bus. The intelligent transformer substation is characterized in that the intelligent transformer substation is connected with a power supply, and the power supply is connected with a power supply through a power supply, wherein the power supply is connected with a power supply through a power supply, and the power supply is connected with a power supply through a power supply; the open loop control mode is adopted, so that the cost is low and the implementation is easy.
Description
Technical Field
The invention relates to the technical field of power distribution areas, in particular to a novel intelligent area and an operation control method thereof.
Background
In recent years, a large number of distributed power sources such as distributed wind power, distributed photoelectricity and the like are directly connected into a power distribution network, and the permeability of the distributed power sources in a platform area is higher and higher. However, the output of the new energy power generation system has larger randomness, the fluctuation of the power in the platform area is more and more affected by the output of the distributed power supply, meanwhile, the novel power utilization load such as the electric vehicle charging pile is more and more affected by personal life habit, the power utilization load has large uncertainty in time space, and the factors further cause the problems of unbalanced supply and demand and reduced power supply quality of the power distribution network, so that the safety and reliability of the power distribution network are challenged little. The main problems faced by the distribution network area side are as follows: 1) The living standard of residents is improved, the load diversity is improved, the load demand is continuously increased, the load borne by the transformer in the transformer area is heavier and heavier, and the condition of short-time overload exists; 2) Although distributed power grid-connection is an effective energy supplement, it does not provide adequate support during transformer overload in the bay due to randomness of the output; 3) In a low valley period of certain load demands, the distributed power supply has a large output, cannot be consumed in situ, and causes reverse power flow in a transformer area, so that the characteristic of unidirectional flow of the traditional power flow is changed, and potential safety hazards are brought to reliable power supply of a power distribution network; 4) Aiming at the short-term overload transformer area, if the transformer area capacity is transformed, the cost is huge and the efficiency is low, if the transformer area capacity is not transformed, the transformer area is small, the transformer area is large, and potential safety hazards are buried in a power grid.
In order to solve the above problems, at present, expert students propose to adopt a fixed or mobile energy storage system to perform coordinated management of source network charge storage, charge and absorb electric energy by using the energy storage system to consume distributed power supply power in the load low-peak period, and discharge electric energy by using the energy storage system to relieve the load pressure of transformer in a transformer area in the load peak period, so as to improve the safety and stability of the power grid. However, complex algorithms are required for comprehensive control of these source network charges, the requirement on the processor is high, and most importantly, as the distributed energy sources are continuously increased and the permeability thereof in low-voltage areas is continuously increased, the deployment of energy storage systems with a considerable capacity in each area is not realistic, and the cost is not acceptable.
Therefore, how to economically and efficiently consume distributed energy widely connected to a power distribution network and quickly balance unbalanced power in a system is a big problem in the development process of the power distribution network.
Disclosure of Invention
The invention mainly aims to solve the problems that in the prior art, a distributed energy source widely connected to a power distribution network is lacked economically and efficiently, and unbalanced power in a system can be quickly balanced, and provides a novel intelligent platform and an operation control method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a novel wisdom district, includes the district transformer, after the output of district transformer is connected intelligent distribution transformer terminal TTU and is incorporated into the power networks with the alternating current busbar, after the remote sampling unit RTU is connected to alternating current distributed power supply output, direct current load, direct current fills electric pile and direct current distributed power supply and is connected with flexible interconnection device SOP after passing through the direct current busbar is parallelly connected, flexible interconnection device SOP exchanges the side and is incorporated into the power networks with the alternating current busbar after connecting remote sampling unit RTU, node load connects gradually intelligent switch and remote sampling unit RTU back and is incorporated into the power networks with the alternating current busbar. The intelligent transformer substation is characterized in that the intelligent transformer substation is connected with a power supply, and the power supply is connected with a power supply through a power supply; the distributed power supply widely connected to the power distribution network is economically and efficiently consumed, and unbalanced power in a system is rapidly balanced.
Preferably, the node load includes a controllable load, a resident base load and an important load, and the controllable load is divided into a controllable energy storage type load and a controllable pump type load. The various loads in the platform area can be put into operation at any time by a user, the controllable loads can be put into operation by the user at any time, the remote sampling unit RTU can send out instructions to put into operation, the remote sampling unit RTU instruction operation has higher priority, and the controllable loads enter a locking state during the remote sampling unit RTU instruction operation, so that the user cannot operate.
Preferably, the remote sampling unit RTU and the controllable load are both provided with a power carrier communication module. The remote sampling unit RTU collects the electrical parameter data of the branch, such as voltage, current, power, electric energy, grid-connected state of the branch and the like, and through the power carrier communication module, not only can the internal parameters of the controllable load be set through instructions and the controllable load be started to operate, but also the parameters of the controllable load, such as rated load power, set temperature, energy storage medium temperature, capacity and the like, can be read, and the collected information is sent to the intelligent distribution transformer terminal TTU. The controllable load is provided with a power carrier communication module, has a power carrier communication function, can be directly controlled by a user to operate, and can also be operated by receiving a control instruction of the remote sampling unit RTU. The intelligent switch receives the instruction of the remote sampling unit RTU and can cut off or close the connection path of the controllable load.
Preferably, the intelligent distribution transformer terminal TTU has communication contact, device sensing, edge calculation and local control functions. In communication, the intelligent distribution transformer terminal TTU communicates with a remote sampling unit RTU in the platform region, acquires electric parameters of each node, grid-connected distributed power supply data and the like, stores the data in a corresponding storage region, and meanwhile has communication capacity based on an Internet network, and the intelligent distribution transformer terminal TTU sends information such as the running state of a transformer in the platform region to an upper management platform at regular intervals (for example, 15 minutes); on the equipment perception, an intelligent distribution transformer terminal TTU collects transformer output parameters of a transformer area, receives data of remote sampling units RTU of each node, and perceives the running state of equipment in the transformer area; the node data is counted by the intelligent distribution transformer terminal TTU through strong computing power, the latest platform node topology is constructed, and the prediction of node load and power supply output is carried out; the intelligent distribution transformer terminal TTU makes a decision through edge calculation, and can send a command to the remote sampling unit RTU, and the remote sampling unit RTU controls the intelligent switch to cut off corresponding controllable loads.
Preferably, the flexible interconnection device SOP comprises a controller, a seamless transfer switch and a bidirectional energy router, and the direct current bus is connected with the alternating current bus through the bidirectional energy router and the seamless transfer switch.
The operation control method of the novel intelligent platform area is suitable for the novel intelligent platform area, and comprises the following steps: step S1: the intelligent distribution transformer terminal TTU predicts the load of the next day district and the output of the distributed power supply according to the historical data, marks the peak load period of the district and the peak output period of the distributed power supply;
step S2: the TTU of the intelligent distribution transformer terminal receives controllable load information of each node at regular time and processes the controllable load;
step S3: the intelligent distribution transformer terminal TTU collects output parameters of the transformer in the transformer area in real time, analyzes the working state of the transformer in the transformer area, and controls the controllable load and the operation of the flexible interconnection device SOP according to the working state of the transformer in the transformer area;
the intelligent household power supply system is based on the current continuously developed intelligent household technology, classifies and controls loads, achieves maximum consumption of distributed power supplies in the transformer area, keeps unidirectional of power flow of the transformer area, and avoids overload state of the transformer in the transformer area. The invention avoids complex mathematical calculation, adopts an open loop control mode, has low cost and is easy to realize.
Preferably, when the direct current load demand is greater than the direct current distributed power supply energy supply, a controller in the flexible interconnection device SOP controls the bidirectional energy router to enable energy to flow from AC to DC, and the alternating current side to the direct current side is used for providing electric energy; when the direct current load demand is smaller than the direct current distributed power supply energy supply, a controller in the flexible interconnection device SOP controls the bidirectional energy router to enable energy to flow from DC to AC, and the direct current side provides electric energy to the alternating current side to consume surplus distributed power supply electric energy so as to prevent the reverse trend of the transformer area.
Preferably, in the step S1, the intelligent distribution transformer terminal TTU predicts the load of the next day station and the output of the distributed power source at a fixed time (such as a zero time) every day according to the historical data, and marks the peak time of the output of the distributed power source and the peak time of the load of the station. The intelligent distribution transformer terminal TTU takes 50% of the maximum output of the distributed power supply as a node based on a distributed power supply output prediction curve, and marks the period between two nodes as the peak period of the distributed power supply output; the intelligent distribution transformer terminal TTU takes 80% of the capacity of a transformer as a node based on a platform load prediction curve, a predicted maximum power value is contained between the two nodes, and the period between the two nodes is marked as the peak period of the platform load (demand).
Preferably, in the step S2, the intelligent distribution transformer terminal TTU receives and processes the controllable load information of each node at regular time, the timing duration is 15 minutes, for the controllable load which is not currently operated, the duration t of the controllable load operated with the power P is calculated, the intelligent distribution transformer terminal TTU counts the controllable load information which is not currently operated, and ranks according to the duration, and the longer the duration is, the more the longer the duration is ranked in front; for the controllable load currently running, the intelligent distribution transformer terminal TTU counts the running parameters of the controllable load currently running, and ranks according to the running power, and the larger the running power is, the more front the running power is. For the controllable energy storage type load which is not operated at present, according to the temperature of the current energy storage medium and the allowable highest temperature of the controllable energy storage type load, according to a formula eta, P is t=C, m is delta T, wherein P is the rated power of the controllable energy storage type load, eta is 0.9, C is the specific heat capacity of water, delta T is the difference between the highest temperature and the lowest temperature of the energy storage medium, and m is calculated according to the volume of the controllable energy storage type load, so that the time T for the controllable energy storage type load to operate at the power P can be calculated.
In the step S3, the intelligent distribution transformer terminal TTU collects output parameters of the transformer in the transformer area in real time, such as voltage, current, power, electric energy, etc., analyzes the working state of the transformer in the transformer area, when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is less than 10% of the capacity of the transformer and the current moment is in the peak period of the distributed power supply output, the intelligent distribution transformer terminal TTU sequentially starts the controllable load to put into operation according to the controllable load record counted in the step S2, and the method is that the intelligent distribution transformer terminal TTU sends an instruction to the remote sampling unit RTU of the node to start the corresponding controllable load, the controllable load is in a locking operation state until the intelligent distribution transformer terminal TTU monitors that the output power of the transformer in the transformer area is recovered to more than 20%, and the intelligent distribution transformer terminal TTU sends an instruction to the remote sampling unit RTU again to unlock the controllable load locking state, and gives the load control right to the user; when the intelligent distribution transformer terminal TTU detects that the output power of a transformer in a transformer area is greater than 90% of the capacity of the transformer and the current moment is in the peak period of the load of the transformer area, the intelligent distribution transformer terminal TTU controls the operation of the controllable load according to the current running controllable load record counted in the step S2, the method is that the intelligent distribution transformer terminal TTU firstly sends an instruction to a remote sampling unit RTU of a corresponding node to control an intelligent switch, the operation of the controllable energy storage type load is cut off, then the intelligent distribution transformer terminal TTU sends the instruction to the remote sampling unit RTU of the corresponding node, the parameter of the controllable pump type load of the node is modified, the controllable pump type load is in a light load operation state, so that the power supply pressure of a power grid is reduced, until the intelligent distribution transformer terminal TTU monitors that the output power of the transformer in the transformer area is recovered to be less than 75%, the intelligent distribution transformer terminal TTU sends the instruction to the remote sampling unit TTU again, the intelligent switch of the node is closed, the controllable load locking state of the corresponding node is unlocked, and the load control right is given to a user;
after the intelligent distribution transformer terminal TTU operates for a period of time, when detecting that the output power of the transformer in the transformer area is less than 5% of the capacity of the transformer and the current moment is in the peak period of the distributed power supply output, in order to avoid the counter flow of the power flow in the transformer area, the intelligent distribution transformer terminal TTU sends a control instruction to the flexible interconnection device SOP to disconnect the bidirectional energy router and stop the direct current side to provide electric energy to the alternating current side; when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is 100% greater than the capacity of the transformer and the current moment is in the peak period of the load of the transformer area, the intelligent distribution transformer terminal TTU sends a command to the remote sampling unit RTU of the corresponding node according to the current running controllable load counted in the step S2, so that the remote sampling unit RTU controls the intelligent switch, the controllable pump load of the corresponding node is disconnected until the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is recovered to below 90%, the intelligent distribution transformer terminal TTU sends a command to the remote sampling unit RTU again, the intelligent switch of the corresponding node is closed, the controllable load locking state of the corresponding node is unlocked, and the load control right is given to a user.
Therefore, the invention has the advantages that:
(1) The distributed power supply energy in the transformer area is maximally absorbed, so that the reverse tide of the transformer area is prevented, and the transformer in the transformer area is prevented from short-term overload;
(2) The distributed power supply widely connected to the power distribution network is economically and efficiently consumed, and unbalanced power in the system is rapidly balanced; (3) Complex mathematical calculation is avoided, an open loop control mode is adopted, the cost is low, the system setting is simple and convenient, and the implementation is easy.
Drawings
Fig. 1 is a schematic diagram of a novel intelligent platform according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a controllable-load access station in an embodiment of the present invention.
FIG. 3 is a graph of predictions in an embodiment of the present invention.
Fig. 4 is a flowchart of a novel intelligent domain operation control method according to an embodiment of the present invention.
1. The intelligent distribution transformer comprises a transformer area 2, an intelligent distribution transformer terminal TTU 3, an alternating current bus 4, an alternating current distributed power supply 5, a remote sampling unit RTU 6, a direct current load 7, a direct current charging pile 8, a direct current distributed power supply 9, a direct current bus 10, a flexible interconnection device SOP 11, a controller 12, a seamless change-over switch 13, a bidirectional energy router 14, a controllable load 15, a resident base load 16, an important load 17, a power carrier communication module 18, a controllable energy storage type load 19, a controllable pump type load 20 and an intelligent switch.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
The utility model provides a novel wisdom platform district, as shown in fig. 1, including platform district transformer 1, be incorporated into the power networks with exchanging busbar 3 after platform district transformer 1's output connects intelligent distribution transformer terminal TTU2, be incorporated into the power networks with exchanging busbar 3 after exchanging distributed power supply 4 output connects remote sampling unit RTU5, direct current load 6, direct current fills electric pile 7 and direct current distributed power supply 8 and is connected with flexible interconnection device SOP10 after parallelly connected through direct current busbar 9, flexible interconnection device SOP10 exchanges the side and is incorporated into the power networks with exchanging busbar 3 after connecting remote sampling unit RTU5, node load connects gradually intelligent switch 20 and remote sampling unit RTU5 back and is incorporated into the power networks with exchanging busbar 3. The embodiment provides a novel intelligent transformer area, which comprises a transformer area transformer 1, wherein the transformer area transformer 1 is 10KV in input and 400V in output, and various distributed power supplies and power loads are contained in the transformer area. There are two distributed power supply grid connection modes, one is directly connected through a low-voltage alternating current bus 3, the other is connected in parallel in a concentrated mode through a direct current bus 9, and then grid connection is controlled through a flexible interconnection device SOP 10. The arrows in fig. 1 represent node loads, which are divided into interruptible controllable loads 14, residential base loads 15, and critical loads 16. Important loads 16, such as data servers, elevators, etc., which must be constantly powered, but not powered off; the resident base load 15 such as lighting, living, kitchen, etc., which ensures the supply of electricity as much as possible. The interruptible controllable load 14 continues to be divided into two categories, one category being a controllable energy storage load 18, such as a heat storage type electric water heater, an electric car battery, a residential small swimming pool heating system, etc., and the other category being a controllable pump load 19, such as an air conditioner, etc. With the rise of current smart home, controllable intelligent devices are more and more, the intelligent area mentioned in this embodiment controls for such controllable intelligent devices in the future, and there are many current modes of smart home communication, such as wifi, bluetooth, 485 serial port and 4G, etc., and the power line carrier communication is a mode based on the power line communication, and has the characteristics of low price in the area, and this embodiment adopts the power line carrier communication to carry out the communication between the appliances. As shown in fig. 2, the controllable load 14 is provided with a power carrier communication module 17, the controllable load 14 is in data communication with a remote sampling unit RTU5 which is also provided with the power carrier communication module 17, information such as temperature, medium capacity, power and the like of the controllable load 14 can be sent to the remote sampling unit RTU5, the intelligent power distribution terminal TTU2 can set parameters of the controllable load 14, such as a load target temperature, through the remote sampling unit RTU5, and the different types of controllable loads 14 are connected into a power grid through the intelligent switch 20 according to a power combination.
The intelligent distribution transformer terminal TTU2 has the functions of communication connection, equipment sensing, edge calculation and local control. In terms of communication, the intelligent distribution transformer terminal TTU2 communicates with a remote sampling unit RTU5 in the platform region, acquires electric parameters of each node, grid-connected distributed power supply data and the like, stores the data in a corresponding storage region, and meanwhile has communication capacity based on an Internet network, and the intelligent distribution transformer terminal TTU2 sends information such as the running state of a transformer in the platform region to an upper management platform at regular intervals (for example, 15 minutes); on the equipment perception, an intelligent distribution transformer terminal TTU2 collects output parameters of a transformer 1 in a transformer area, receives data of remote sampling units RTU5 of each node, and perceives the running state of equipment in the transformer area; the intelligent distribution transformer terminal TTU2 counts node data through strong computing power, and builds the latest node topology of the platform area to predict node load and power output; the intelligent distribution transformer terminal TTU2 makes a decision through edge calculation, and can send a command to the remote sampling unit RTU5, and the remote sampling unit RTU5 controls the intelligent switch 20 to cut off the corresponding controllable load 14. The remote sampling unit RTU5 collects the electrical parameter data of the present branch, such as voltage, current, power, electric energy, and the grid-connected state of the present branch, on the one hand, and through the power carrier communication module 17, not only can set the internal parameters of the controllable load 14 by instructions and start the controllable load 14 to operate, but also can read the parameters of the controllable load 14, such as the rated load power, the set temperature, the temperature and capacity of the energy storage medium, and sends the collected information to the intelligent distribution transformer terminal TTU2. The intelligent switch 20 receives an instruction from the remote sampling unit RTU5, and can cut off or close the connection path of the controllable load 14. The flexible interconnection device SOP10 comprises a controller 11, a seamless changeover switch 12 and a bidirectional energy router 13, and the direct current bus 9 is connected with the alternating current bus 3 through the bidirectional energy router 13 and the seamless changeover switch 12.
The operation control method of the novel intelligent platform area is suitable for the novel intelligent platform area, as shown in fig. 4, and comprises the following steps:
step S1: the intelligent distribution transformer terminal TTU predicts the load of the next day district and the output of the distributed power supply according to the historical data, marks the peak load period of the district and the peak output period of the distributed power supply;
step S2: the TTU of the intelligent distribution transformer terminal receives controllable load information of each node at regular time and processes the controllable load;
step S3: the intelligent distribution transformer terminal TTU collects output parameters of the transformer in the transformer area in real time, analyzes the working state of the transformer in the transformer area, and controls the controllable load and the operation of the flexible interconnection device SOP according to the working state of the transformer in the transformer area;
the embodiment classifies and controls the load based on the intelligent home technology which is continuously developed at present, and realizes the maximum consumption of distributed power supplies in a platform area.
And the alternating current type direct grid-connected distributed power supplies, such as a wind power supply and a photovoltaic power supply, are directly grid-connected to generate power by the maximum power output.
The various loads in the platform area can be put into operation at any time by a user, the controllable loads can be put into operation by the user at any time, the remote sampling unit RTU can send out instructions to put into operation, the remote sampling unit RTU instruction operation has higher priority, and the controllable loads enter a locking state during the remote sampling unit RTU instruction operation, so that the user cannot operate.
The flexible interconnection device SOP connects the equipment such as the district direct current photovoltaic power supply, the electric automobile charging pile, the direct current load and the like together through the form of a direct current bus, and the direct current bus is connected with the district alternating current bus through a bidirectional energy router and a seamless change-over switch in the flexible interconnection device. When the direct current load demand is greater than the direct current distributed power supply energy supply, a controller in the flexible interconnection device SOP controls the bidirectional energy router to enable energy to flow from AC to DC, and the alternating current side provides electric energy to the direct current side; when the direct current load demand is smaller than the direct current distributed power supply energy supply, a controller in the flexible interconnection device SOP controls the bidirectional energy router to enable energy to flow from DC to AC, and the direct current side provides electric energy to the alternating current side to consume surplus distributed power supply electric energy so as to prevent the reverse trend of the transformer area.
In step S1, the intelligent distribution transformer terminal TTU predicts the load of the next day station and the output of the distributed power source at a fixed time (such as a zero time) every day according to the historical data, and marks the peak time of the output of the distributed power source and the peak time of the load of the station. Assuming that the rated capacity of a transformer in a certain area is 1MVA, fig. 3 (a), (b) and (c) respectively show a 24-hour load demand curve, a distributed power supply (distributed photovoltaic) output curve and an area load demand curve after the distributed power supply is absorbed in an area predicted by a TTU of an intelligent distribution transformer terminal, and as can be seen from fig. 3, the distributed power supply has the greatest output in daytime, the load fluctuation of the area is larger, and the demand has multiple peak periods and also has valley periods. As can be seen from fig. 3 (c), when the power is fully output from the distributed power supply, the transformer in the transformer area is in a light load state between 4-23 time points and 43-53 time points, and even between 46-50 time points, a reverse trend occurs, that is, the power output of the distributed power supply in the transformer area is greater than the load demand of the transformer area; and between points 76-79 the load demand of the transformer area exceeds the specific capacity of the transformer in the transformer area, and the transformer is in a short-term overload state. Obviously, the running control of the transformer area is not performed, so that the transformer in the transformer area is in an overload and reverse tide danger, and the transformer is in a light load state for a long time, so that the power supply efficiency is low;
the intelligent distribution transformer terminal TTU takes 50% of the maximum output of the distributed power supply as a node based on a distributed power supply output prediction curve, as shown in A, B of fig. 3 (b), and the period between the two points marked A, B is the peak period of the output of the distributed power supply; based on the load prediction curve of the platform region, the intelligent distribution transformer terminal TTU takes 80% of the capacity of the transformer as a node, as shown in two points C, D and C, D of fig. 3 (a), a predicted maximum power value is contained between the two points, and the period between the two points C, D is marked as the peak period of the load demand of the platform region.
In step S2, the TTU receives and processes the controllable load information of each node at regular time, the time duration is 15 minutes, for the controllable load which is not operated currently, the time duration t of the controllable load operated by the power P is calculated, the TTU counts the controllable load information which is not operated currently, and the TTU orders the controllable load information according to the time duration, and the longer the time duration is, the more the controllable load information is arranged in front; for the controllable load currently running, the intelligent distribution transformer terminal TTU counts the running parameters of the controllable load currently running, and ranks according to the running power, and the larger the running power is, the more front the running power is. For the controllable energy storage type load which is not operated at present, according to the temperature of the current energy storage medium and the allowable highest temperature of the controllable energy storage type load, according to a formula eta, P is t=C, m is delta T, wherein P is the rated power of the controllable energy storage type load, eta is 0.9, C is the specific heat capacity of water, delta T is the difference between the highest temperature and the lowest temperature of the energy storage medium, and m is calculated according to the volume of the controllable energy storage type load, so that the time T for the controllable energy storage type load to operate at the power P can be calculated.
In the step S3, the intelligent distribution transformer terminal TTU collects output parameters of the transformer in the transformer area in real time, such as voltage, current, power, electric energy and the like, analyzes the working state of the transformer in the transformer area, and when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is smaller than 10% of the capacity of the transformer and the current moment is in the peak period of distributed power output, the intelligent distribution transformer terminal TTU sequentially starts controllable load to put into operation according to the current non-running controllable load record counted in the step S2; when the intelligent distribution transformer terminal TTU detects that the output power of a transformer in a transformer area is greater than 90% of the capacity of the transformer and the current moment is in the peak period of the load of the transformer area, the intelligent distribution transformer terminal TTU controls the operation of the controllable load according to the current running controllable load record counted in the step S2, the method is that the intelligent distribution transformer terminal TTU firstly sends an instruction to a remote sampling unit RTU of a corresponding node to control an intelligent switch, the operation of the controllable energy storage type load is cut off, then the intelligent distribution transformer terminal TTU sends the instruction to the remote sampling unit RTU of the corresponding node, the parameter of the controllable pump type load of the node is modified, the controllable pump type load is in a light load operation state, so that the power supply pressure of a power grid is reduced, until the intelligent distribution transformer terminal TTU monitors that the output power of the transformer in the transformer area is recovered to be less than 75%, the intelligent distribution transformer terminal TTU sends the instruction to the remote sampling unit TTU again, the intelligent switch of the node is closed, the controllable load locking state of the corresponding node is unlocked, and the load control right is given to a user;
after the intelligent distribution transformer terminal TTU operates for a period of time, when detecting that the output power of the transformer in the transformer area is less than 5% of the capacity of the transformer and the current moment is in the peak period of the distributed power supply output, in order to avoid the counter flow of the power flow in the transformer area, the intelligent distribution transformer terminal TTU sends a control instruction to the flexible interconnection device SOP to disconnect the bidirectional energy router and stop the direct current side to provide electric energy to the alternating current side; when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is 100% greater than the capacity of the transformer and the current moment is in the peak period of the load of the transformer area, the intelligent distribution transformer terminal TTU sends a command to the remote sampling unit RTU of the corresponding node according to the current running controllable load counted in the step S2, so that the remote sampling unit RTU controls the intelligent switch, the controllable pump load of the corresponding node is disconnected until the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is recovered to below 90%, the intelligent distribution transformer terminal TTU sends a command to the remote sampling unit RTU again, the intelligent switch of the corresponding node is closed, the controllable load locking state of the corresponding node is unlocked, and the load control right is given to a user.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a novel wisdom district, includes the district transformer, its characterized in that, after the district transformer's output is connected intelligent distribution transformer terminal TTU with exchange the busbar and be incorporated into the power networks, exchange behind the distributed power output connection remote sampling unit RTU with exchange the busbar and be incorporated into the power networks, direct current load, direct current fills electric pile and direct current distributed power supply and is connected with flexible interconnection device SOP after passing through the direct current busbar parallelly connected, flexible interconnection device SOP exchanges the side and is connected behind remote sampling unit RTU with exchange the busbar and be incorporated into the power networks, node load connects gradually behind intelligent switch and the remote sampling unit RTU with exchange the busbar and be incorporated into the power networks.
2. The novel intelligent block of claim 1, wherein the node loads include controllable loads, residential base loads and critical loads, the controllable loads being divided into controllable energy storage loads and controllable pump loads.
3. The novel intelligent substation of claim 2, wherein the remote sampling unit RTU and the controllable load are provided with power carrier communication modules.
4. The intelligent transformer area of claim 1, wherein the intelligent transformer terminal TTU has communication connection, device sensing, edge calculation and local control functions.
5. The novel intelligent block according to claim 1, 2, 3 or 4, wherein the flexible interconnection device SOP comprises a controller, a seamless switch and a bidirectional energy router, and the direct current bus is connected with the alternating current bus through the bidirectional energy router and the seamless switch.
6. A novel intelligent block operation control method, which is applicable to a novel intelligent block as claimed in any one of claims 1 to 5, and is characterized by comprising the following steps:
step S1: the intelligent distribution transformer terminal TTU predicts the load of the next day district and the output of the distributed power supply according to the historical data, marks the peak load period of the district and the peak output period of the distributed power supply;
step S2: the TTU of the intelligent distribution transformer terminal receives controllable load information of each node at regular time and processes the controllable load;
step S3: the intelligent distribution transformer terminal TTU collects output parameters of the transformer in the transformer area in real time, analyzes the working state of the transformer in the transformer area, and controls the controllable load and the operation of the flexible interconnection device SOP according to the working state of the transformer in the transformer area.
7. The operation control method of a novel intelligent substation according to claim 6, wherein when the direct current load demand is greater than the direct current distributed power supply energy supply, a controller in the flexible interconnection device SOP controls the bidirectional energy router to enable energy to flow from AC to DC, and the alternating current side provides electric energy to the direct current side; when the direct current load demand is smaller than the direct current distributed power supply energy supply, a controller in the flexible interconnection device SOP controls the bidirectional energy router to enable energy to flow from DC to AC, and the direct current side provides electric energy to the alternating current side.
8. The method for controlling operation of a novel intelligent transformer area according to claim 6 or 7, wherein in the step S1, the intelligent distribution transformer terminal TTU takes 50% of the maximum output of the distributed power supply as a node based on the output prediction curve of the distributed power supply, and marks the period between two nodes as the peak period of the output of the distributed power supply; based on a platform load prediction curve, the intelligent distribution transformer terminal TTU takes 80% of the capacity of the transformer as a node, and marks the period between the two nodes as the peak period of the platform load.
9. The operation control method of a novel intelligent transformer area according to claim 8, wherein in the step S2, for the controllable load that is not currently operated, a time period t for which the controllable load operates with power P is calculated, the intelligent distribution transformer terminal TTU counts the controllable load information that is not currently operated, and ranks according to the time period, and the longer the time period is, the more front the row is; for the controllable load currently running, the intelligent distribution transformer terminal TTU counts the running parameters of the controllable load currently running, and ranks according to the running power, and the larger the running power is, the more front the running power is.
10. The method for controlling operation of a novel intelligent transformer area according to claim 9, wherein in the step S3, when the intelligent distribution transformer terminal TTU detects that the transformer output power of the transformer area is less than 10% of the transformer capacity and the current moment is in the peak period of distributed power output, the intelligent distribution transformer terminal TTU sequentially starts the controllable load to put into operation according to the controllable load record counted in the step S2 and not operated currently; when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is greater than 90% of the capacity of the transformer and the current moment is in the peak period of the load of the transformer area, the intelligent distribution transformer terminal TTU cuts off the operation of the controllable energy storage type load according to the controllable load record which is counted in the step S2 and adjusts the controllable pump type load to be in a light load operation state; after the intelligent distribution transformer terminal TTU runs and controls for a period of time, when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is less than 5% of the capacity of the transformer and the current moment is in the peak period of distributed power output, the intelligent distribution transformer terminal TTU sends a control instruction to the flexible interconnection device SOP to disconnect the bidirectional energy router, and the direct current side is stopped to provide electric energy to the alternating current side; when the intelligent distribution transformer terminal TTU detects that the output power of the transformer in the transformer area is 100% greater than the capacity of the transformer and the current moment is in the peak period of the load of the transformer area, the intelligent distribution transformer terminal TTU cuts off the operation of the controllable pump type load according to the controllable load which is counted in the step S2 and is currently running.
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