CN-122000985-A - Comprehensive treatment method, system, equipment and medium for distributed resource distribution network

CN122000985ACN 122000985 ACN122000985 ACN 122000985ACN-122000985-A

Abstract

The invention belongs to the technical field of power grid optimization operation, and discloses a comprehensive treatment method, a system, equipment and a medium for a distributed resource power distribution network, wherein the method comprises the steps of constructing an interaction mode of distributed resources of the power distribution network and a virtual power plant based on an active and reactive cooperative regulation mechanism of the power distribution network of the virtual power plant technology; the method comprises the steps of aggregating multi-target distributed resources, constructing a heterogeneous resource aggregation model, converting the heterogeneous resource aggregation model into standardized feasible region representation and cost function representation by utilizing an equivalent external characteristic approximation algorithm, constructing a collaborative regulation model based on the interaction mode of the distributed resources of the power distribution network and the virtual power plants and the standardized feasible region representation and cost function representation, comprehensively regulating the multi-target distributed resources by utilizing the collaborative regulation model, and outputting an optimal scheduling instruction to realize multi-target comprehensive treatment of the power distribution network. The invention effectively embodies the adjustment willingness of the distributed resource main body and realizes the high-reliability implementation of the adjustment and control instruction.

Inventors

HUANG MIN
ZHANG LINLI
SU GUOQIANG
LIU HEJIN
YOU XINHONG
ZHANG PENGPING
HE JIAHUI
SUN JIYUAN
HE BANGWEI
YUAN TONG
WEN XIANGYU
LIU YANG
WANG FENG
YU HAIDONG
LIU WENBIN
LI LISHENG
WU YING
ZHOU CHENGHAN
YIN ZIYANG

Assignees

国网山东省电力公司电力科学研究院
国家电网有限公司

Dates

Publication Date: 20260508
Application Date: 20251204

Claims (16)

1. The comprehensive treatment method for the distributed resource distribution network is characterized by comprising the following steps of: An active and reactive cooperative regulation mechanism of a power distribution network based on a virtual power plant technology is used for constructing an interaction mode of distributed resources of the power distribution network and the virtual power plant; aggregating the multi-target distributed resources, constructing a heterogeneous resource aggregation model, and converting the heterogeneous resource aggregation model into standardized feasible domain characterization and cost function characterization by utilizing an equivalent external characteristic approximation algorithm; Based on the interaction mode of the distributed resources of the power distribution network and the virtual power plants, the standardized feasible region representation and the standardized cost function representation, a cooperative regulation model is constructed, the cooperative regulation model is utilized to comprehensively regulate and control the multi-target distributed resources, and an optimal scheduling instruction is output, so that the multi-target comprehensive treatment of the power distribution network is realized.
2. The comprehensive treatment method for the distributed resource power distribution network according to claim 1, wherein the construction of the interaction mode of the distributed resource of the power distribution network and the virtual power plant based on the active and reactive cooperative regulation mechanism of the power distribution network by the virtual power plant technology comprises the following steps: A virtual power plant is utilized to build a bidirectional information interaction mechanism with a power distribution network operator by aggregating distributed resources; The virtual power plant is used as a basic unit participating in the operation of the power distribution network and is responsible for providing the power distribution network operators with the regulation capability and the regulation cost so as to realize the efficient aggregation and regulation of the distributed resources.
3. The comprehensive treatment method for a distributed resource power distribution network according to claim 2, wherein the taking the virtual power plant as a basic unit participating in the operation of the power distribution network is responsible for providing the power distribution network operator with the adjustment capability and the adjustment cost, so as to realize efficient aggregation and adjustment of the distributed resources, and the method comprises the following steps: In terms of regulating capacity, the virtual power plant is required to provide four types of core descriptive quantities for a power distribution network operator to comprehensively represent the regulating capacity of the virtual power plant, wherein the four types of core descriptive quantities comprise an upper limit and a lower limit for representing active power and reactive power of a power regulating range which can be provided by the virtual power plant at the current moment, an active and reactive combined power constraint for reflecting a coupling relation between active and reactive outputs caused by physical limits of a power electronic converter, an upper limit and a lower limit for representing energy state of continuous regulating capacity of the virtual power plant containing energy storage on a longer time scale, and an upper limit and a lower limit for describing a change capacity limit climbing rate of the power output of the virtual power plant in unit time; In terms of regulation cost, the regulation cost of the virtual power plant is defined as a binary function related to both active power and reactive power, so that the influence of reactive power regulation on the loss of the converter and the economy of active output can be accurately described; through standardized interaction of adjustment capability and adjustment cost, efficient aggregation and adjustment of distributed resources are achieved.
4. The comprehensive treatment method for a distributed resource power distribution network according to claim 1, wherein the steps of aggregating multi-objective distributed resources based on the interaction mode of the distributed resources of the power distribution network and the virtual power plants, constructing a heterogeneous resource aggregation model, and converting the heterogeneous resource aggregation model into standardized feasible region representation and cost function representation by using an equivalent external characteristic approximation algorithm include: based on an interaction mode of distributed resources of a power distribution network and a virtual power plant, aggregating distributed photovoltaics, an energy storage system, an electric vehicle charging station and flexible loads to construct an heterogeneous resource aggregation model; The complexity of the heterogeneous resource aggregation model is reduced by utilizing an equivalent external characteristic approximation algorithm, and the unified and standardized canonical representation requirements of the interaction mode on the heterogeneous resource aggregation model are met based on a mathematical method of a keno polyhedron; Sampling the heterogeneous resource aggregation model in a preset range of active power and reactive power, fitting a nonlinear relation between the active power, the reactive power and the running cost of the virtual power plant by adopting a back propagation neural network, and acquiring a discretized corresponding relation between the power and the cost so as to simplify the model and improve the calculation efficiency; Through geometric approximation and artificial intelligence technology, the heterogeneous resource model is converted into standardized feasible region representation and cost function representation according to the corresponding relation between the standard representation requirement and the discretized power and cost.
5. The comprehensive treatment method for a distributed resource power distribution network according to claim 1, wherein the constructing a collaborative regulation model based on the interaction mode of the distributed resource and the virtual power plant of the power distribution network and the standardized feasible region representation and the standardized cost function representation, and comprehensively regulating and controlling the multi-target distributed resource by using the collaborative regulation model, and outputting an optimal scheduling instruction to realize the multi-target comprehensive treatment for the power distribution network comprises: Taking the interaction mode of the distributed resources of the power distribution network and the virtual power plant as a guide, comprehensively considering multiple optimization targets, and constructing a collaborative regulation and control model by combining the virtual power plant operation constraint, standardized feasible region representation and cost function representation; and solving the cooperative regulation model by using a heuristic algorithm, processing the operation constraint of the virtual power plant, searching a global or near global optimal solution, and finally outputting an optimal scheduling instruction for the active power and the reactive power of each virtual power plant.
6. The comprehensive treatment method for a distributed resource power distribution network according to claim 5, wherein the multiple optimization objectives include: the overall operation cost of all the access virtual power plants is minimized, so that the system economy is improved; The energy utilization efficiency is improved by minimizing the total network loss of the system; The power supply quality and the safe and stable operation of the system are ensured by minimizing the sum of voltage deviations of all nodes; And each sub-target is coordinated and optimized through a configurable weight coefficient so as to adapt to scheduling requirements under different operation scenes, and a complete comprehensive treatment target system of the power distribution network is formed.
7. The method of comprehensive abatement of distributed resource power distribution networks according to claim 5, wherein the virtual power plant operating constraints include: Adopting accurate network constraint based on alternating current power flow to completely describe the balance relation between active power and reactive power in the power distribution network, the node voltage safety range and the line current transmission limit value so as to ensure that an optimization scheme accords with the physical rule and the safety standard of the power grid; And introducing a virtual power plant standardized representation constraint of the Qinon polyhedral algorithm, and aggregating a plurality of virtual power plant individual feasibility domains into a unified operation boundary through geometric operation.
8. A distributed resource distribution network comprehensive treatment system, the system comprising: the interaction management module is used for constructing an interaction mode of distributed resources of the power distribution network and the virtual power plant based on an active and reactive cooperative regulation mechanism of the power distribution network of the virtual power plant technology; the aggregation and standardization module is used for aggregating the multi-target distributed resources, constructing a heterogeneous resource aggregation model, and converting the heterogeneous resource aggregation model into standardized feasible domain representation and cost function representation by utilizing an equivalent external characteristic approximation algorithm; The resource regulation and control module is used for constructing a cooperative regulation and control model based on the interaction mode of the distributed resources of the power distribution network and the virtual power plant, the standardized feasible region representation and the standardized cost function representation, comprehensively regulating and controlling the multi-target distributed resources by utilizing the cooperative regulation and control model, and outputting an optimal scheduling instruction so as to realize multi-target comprehensive treatment of the power distribution network.
9. The comprehensive treatment system for a distributed resource power distribution network according to claim 8, wherein the power distribution network active and reactive cooperative regulation mechanism based on the virtual power plant technology, the construction of the interaction mode of the distributed resource of the power distribution network and the virtual power plant comprises: A virtual power plant is utilized to build a bidirectional information interaction mechanism with a power distribution network operator by aggregating distributed resources; The virtual power plant is used as a basic unit participating in the operation of the power distribution network and is responsible for providing the power distribution network operators with the regulation capability and the regulation cost so as to realize the efficient aggregation and regulation of the distributed resources.
10. The comprehensive treatment system for a distributed resource distribution network according to claim 9, wherein the taking the virtual power plant as a basic unit participating in the operation of the distribution network is responsible for providing the distribution network operator with the adjustment capability and the adjustment cost, so as to realize efficient aggregation and adjustment of the distributed resource comprises: In terms of regulating capacity, the virtual power plant is required to provide four types of core descriptive quantities for a power distribution network operator to comprehensively represent the regulating capacity of the virtual power plant, wherein the four types of core descriptive quantities comprise an upper limit and a lower limit for representing active power and reactive power of a power regulating range which can be provided by the virtual power plant at the current moment, an active and reactive combined power constraint for reflecting a coupling relation between active and reactive outputs caused by physical limits of a power electronic converter, an upper limit and a lower limit for representing energy state of continuous regulating capacity of the virtual power plant containing energy storage on a longer time scale, and an upper limit and a lower limit for describing a change capacity limit climbing rate of the power output of the virtual power plant in unit time; In terms of regulation cost, the regulation cost of the virtual power plant is defined as a binary function related to both active power and reactive power, so that the influence of reactive power regulation on the loss of the converter and the economy of active output can be accurately described; through standardized interaction of adjustment capability and adjustment cost, efficient aggregation and adjustment of distributed resources are achieved.
11. The comprehensive treatment system of a distributed resource distribution network according to claim 8, wherein the aggregation of the multi-objective distributed resources based on the interaction pattern of the distributed resources of the distribution network and the virtual power plants, the construction of the heterogeneous resource aggregation model, and the conversion of the heterogeneous resource aggregation model into the standardized feasible region representation and the cost function representation by using the equivalent external characteristic approximation algorithm comprise: based on an interaction mode of distributed resources of a power distribution network and a virtual power plant, aggregating distributed photovoltaics, an energy storage system, an electric vehicle charging station and flexible loads to construct an heterogeneous resource aggregation model; The complexity of the heterogeneous resource aggregation model is reduced by utilizing an equivalent external characteristic approximation algorithm, and the unified and standardized canonical representation requirements of the interaction mode on the heterogeneous resource aggregation model are met based on a mathematical method of a keno polyhedron; Sampling the heterogeneous resource aggregation model in a preset range of active power and reactive power, fitting a nonlinear relation between the active power, the reactive power and the running cost of the virtual power plant by adopting a back propagation neural network, and acquiring a discretized corresponding relation between the power and the cost so as to simplify the model and improve the calculation efficiency; Through geometric approximation and artificial intelligence technology, the heterogeneous resource model is converted into standardized feasible region representation and cost function representation according to the corresponding relation between the standard representation requirement and the discretized power and cost.
12. The comprehensive treatment system of a distributed resource power distribution network according to claim 8, wherein the constructing a collaborative regulation model based on the interaction mode of the distributed resource of the power distribution network and the virtual power plant and the standardized feasible region representation and the standardized cost function representation, and performing comprehensive regulation on the multi-objective distributed resource by using the collaborative regulation model, and outputting an optimal scheduling instruction to realize multi-objective comprehensive treatment of the power distribution network comprises: Taking the interaction mode of the distributed resources of the power distribution network and the virtual power plant as a guide, comprehensively considering multiple optimization targets, and constructing a collaborative regulation and control model by combining the virtual power plant operation constraint, standardized feasible region representation and cost function representation; and solving the cooperative regulation model by using a heuristic algorithm, processing the operation constraint of the virtual power plant, searching a global or near global optimal solution, and finally outputting an optimal scheduling instruction for the active power and the reactive power of each virtual power plant.
13. The distributed resource power distribution network comprehensive abatement system of claim 12, wherein the multiple optimization objectives comprise: the overall operation cost of all the access virtual power plants is minimized, so that the system economy is improved; The energy utilization efficiency is improved by minimizing the total network loss of the system; The power supply quality and the safe and stable operation of the system are ensured by minimizing the sum of voltage deviations of all nodes; And each sub-target is coordinated and optimized through a configurable weight coefficient so as to adapt to scheduling requirements under different operation scenes, and a complete comprehensive treatment target system of the power distribution network is formed.
14. The distributed resource power distribution network integrated abatement system of claim 12, wherein the virtual power plant operating constraints comprise: Adopting accurate network constraint based on alternating current power flow to completely describe the balance relation between active power and reactive power in the power distribution network, the node voltage safety range and the line current transmission limit value so as to ensure that an optimization scheme accords with the physical rule and the safety standard of the power grid; And introducing a virtual power plant standardized representation constraint of the Qinon polyhedral algorithm, and aggregating a plurality of virtual power plant individual feasibility domains into a unified operation boundary through geometric operation.
15. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
16. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.

Description

Comprehensive treatment method, system, equipment and medium for distributed resource distribution network Technical Field The invention relates to the technical field of power grid optimization operation, in particular to a comprehensive treatment method, a system, equipment and a medium for a distributed resource power distribution network. Background The distributed new energy can generate electricity nearby, reduce transmission loss, and effectively utilize idle space such as roof, thereby improving energy utilization efficiency, guaranteeing power supply reliability, and promoting the digestion and development of renewable energy. Therefore, in recent years, development is rapid, the installed amount is rapidly increased, and the local area exceeds the centralized new energy installation. Meanwhile, distributed resources such as distributed energy storage, micro-combustion engines and electric automobiles are also connected into the power distribution network in a large quantity, so that the power distribution network is more prone to the problems of voltage out-of-limit, power flow out-of-limit, heavy overload of equipment and the like. In this regard, the conventional regulation and control means cannot completely meet the requirements of construction and development of a novel power system, and further development of novel regulation and control means in the system is needed. By actively guiding and efficiently managing distributed resources in the power distribution network, voltage management of the power distribution network can be realized under the condition that no physical equipment is newly added, and investment cost of the power distribution network is reduced. At present, research on comprehensive treatment of a power distribution network containing large-scale distributed resources is mainly focused on centralized or distributed optimal scheduling of the distributed resources, distributed resource modeling and scheduling in an uncertain environment, aggregation optimization of the distributed resources, interactive iterative optimization of the distributed resources and the power distribution network, and the like. However, the above research does not consider the participation intention of the distributed resource and the coupling relation of the active power and the reactive power. The distributed resources are used as the resources which can be directly scheduled by the power distribution network by default, and the active and reactive power are respectively optimally scheduled, so that the defects that the actual scheduling effect is not consistent with the actual scheduling effect, the scheduling capability of the distributed resources cannot be fully and accurately exerted and the like are overcome. Therefore, how to provide a comprehensive treatment method, system, equipment and medium for a distributed resource power distribution network is a problem to be solved at present. Disclosure of Invention The embodiment of the invention provides a comprehensive treatment method, a system, equipment and a medium for a distributed resource distribution network, which are used for solving the problems of the prior art. According to a first aspect of an embodiment of the invention, a comprehensive treatment method for a distributed resource power distribution network is provided. In one embodiment, the comprehensive treatment method of the distributed resource power distribution network comprises the steps of constructing an interaction mode of distributed resources of the power distribution network and a virtual power plant based on an active and reactive cooperative regulation mechanism of the power distribution network based on a virtual power plant technology, aggregating multi-target distributed resources, constructing an heterogeneous resource aggregation model, converting the heterogeneous resource aggregation model into standardized feasible region representation and cost function representation by using an equivalent external characteristic approximation algorithm, constructing a cooperative regulation model based on the interaction mode of the distributed resources of the power distribution network and the virtual power plant and the standardized feasible region representation and cost function representation, comprehensively regulating the multi-target distributed resources by using the cooperative regulation model, and outputting optimal scheduling instructions to realize multi-target comprehensive treatment of the power distribution network. In one embodiment, the virtual power plant technology-based active and reactive power cooperative regulation mechanism of the power distribution network is used for constructing an interaction mode of distributed resources of the power distribution network and virtual power plants, wherein the virtual power plants are utilized to aggregate the distributed resources and establish a bidirectional information interaction mechanism with a power