CN-121981581-A - Flexible power distribution network interconnection device site selection and volume determination method and system

CN121981581ACN 121981581 ACN121981581 ACN 121981581ACN-121981581-A

Abstract

The invention provides a flexible power distribution network interconnection device site selection and volume determination method and system, and belongs to the technical field of flexible power distribution networks. The method comprises the steps of obtaining inter-regional power mutual-aid potential and electrical distances among power distribution network nodes to generate a power distribution network node association matrix, carrying out association enhancement on a preliminary SOP (self-service provider) site selection scheme based on the power distribution network node association matrix, adopting a binary particle swarm optimization algorithm, determining an optimal SOP site selection scheme and a final power distribution network node association matrix through the enhanced SOP site selection scheme, calculating minimum mutual-aid capacity which each SOP must meet, constructing and solving a capacity optimization model aiming at minimizing full life cycle cost by taking the minimum mutual-aid capacity as constraint, and outputting an optimal SOP constant-volume scheme. The invention improves the long-term load balancing capability and the cross-region flexible resource mutual efficiency of the power distribution network, and improves the intelligent level and the calculation efficiency of the optimization process.

Inventors

ZHENG ZHEN
Tian Zeqing
GU HUA
ZHU YILIN
LI JINYU
XING HAIJUN
ZHANG WEN
HUANG CHENHONG
SHEN XIAOFENG
MA XIAOLI
YAN HUAMIN
ZHANG YING
MA TAOTAO
LU JINGJING

Assignees

国网上海市电力公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. The flexible power distribution network interconnection device site selection and volume determination method is characterized by comprising the following steps of: acquiring cross-platform power mutual potential and electrical distances among power distribution network nodes to generate a power distribution network node association matrix; the method comprises the steps of generating comprehensive selection probability of power distribution network nodes based on a power distribution network node incidence matrix, taking nodes with the comprehensive selection probability larger than a preset probability threshold as a preliminary SOP (self-service provider) addressing scheme, carrying out incidence enhancement on the preliminary SOP addressing scheme based on the power distribution network node incidence matrix, and generating an enhanced SOP addressing scheme; And constructing and solving a capacity optimization model aiming at minimizing the total life cycle cost by taking the minimum mutual capacity as a constraint, and outputting an optimal SOP constant volume scheme.
2. The flexible power distribution network interconnection device location and volume determining method according to claim 1, wherein the method comprises the following steps: Generating a node association matrix of a power distribution network , Representing the number of nodes of the distribution network, The distribution network node association degree between the distribution network node a and the distribution network node b is represented by the following formula: In the formula, , Represents the cross-site association weight coefficient, Representing the electrical proximity between distribution network node a and distribution network node b, expressed by the following formula: In the formula, Indicating the minimum electrical distance of the whole network, Indicating that the divide-by-zero constant is prevented, Representing the electrical distance between distribution network node a and distribution network node b, The power mutual potential of the cross-platform region between the power distribution network node a and the power distribution network node b is represented by the following formula: In the formula, Representing the load active power of the distribution network node a, Representing the load active power of the distribution network node b, Representing the maximum load active power of all distribution network nodes, Representing the minimum load active power of all distribution network nodes.
3. The flexible power distribution network interconnection device location and volume determining method according to claim 1, wherein the method comprises the following steps: generating the comprehensive selection probability of the power distribution network node comprises: According to the power distribution network node incidence matrix, simulating probability amplitude density of the power distribution network nodes by adopting a quantum walking mechanism, calculating selection probability increment of the power distribution network nodes by adopting quantum interference superposition according to the probability amplitude density, and generating comprehensive selection probability of the power distribution network nodes according to the basic selection probability and the selection probability increment.
4. A flexible distribution network interconnection device location and volume determining method as claimed in claim 3, wherein: calculating the selection probability increment of the power distribution network node comprises: Constructing a quantum transition operator according to a node incidence matrix of the power distribution network, carrying out quantum state evolution on an initial state of quantum walking through the quantum transition operator to obtain a quantum state vector, calculating probability amplitude density of the power distribution network nodes according to the quantum state vector, calculating an original graph propagation probability increment by adopting quantum interference superposition according to the probability amplitude density, and expressing the probability increment by the following formula: In the formula, Represent the first The original graph propagation probability increment of the d power distribution network node of the ith SOP site selection scheme, Algebraic indexes representing iterative processes of the binary particle swarm optimization algorithm, , Represents the maximum iteration number of the binary particle swarm optimization algorithm, Represent the first Probability amplitude density of the d power distribution network node of the i-th SOP addressing scheme in the walking of the step amount, Representation of The number of previous quantum history steps, , The indication function is represented by a representation of the indication function, Representing the units of an imaginary number, Indicating the first time of quantum walking after r steps The path of the d-th power distribution network node of the step is associated with a phase angle; normalizing the propagation probability increment of the original graph to obtain the selection probability increment of the power distribution network node.
5. The flexible power distribution network interconnection device location and volume determining method according to claim 1, wherein the method comprises the following steps: generating an enhanced SOP addressing scheme expressed by the following formula: In the formula, Represent the first Enhancement SOP addressing scheme for ith SOP The installation decisions of the nodes of the individual distribution network, Represent the first Generation of the ith preliminary SOP site selection scheme The installation decisions of the nodes of the individual distribution network, Is shown in the first The individual distribution network nodes are equipped with SOP ports, Indicating not to be at the first The individual distribution network nodes are equipped with SOP ports, Is shown in the first Any one distribution network node exists in the ith generation of preliminary SOP (system on demand) site selection scheme Is set to 1 in the installation decision of (a), Represent the first Generation 1 Individual distribution network nodes and the th The degree of association of distribution network nodes among the individual distribution network nodes, Representing the association threshold.
6. The flexible power distribution network interconnection device location and volume determining method according to claim 1, wherein the method comprises the following steps: The determining of the optimal SOP addressing scheme and the final distribution network node association matrix comprises the following steps: Setting the enhanced SOP addressing scheme as a current-generation SOP addressing scheme, calculating a cross-platform mutual potential score of the current-generation SOP addressing scheme, and calculating the comprehensive fitness of the current-generation SOP addressing scheme by combining the investment cost of the current-generation SOP addressing scheme; Determining the individual historical optimal address and the group historical optimal address of the current generation according to the comprehensive adaptability of the SOP address scheme of the current generation; Setting the top K site selection schemes with highest comprehensive adaptability ranking of the current generation SOP site selection scheme as elite scheme sets, and taking SOP connection node pair sets in each elite scheme to calculate dynamic mutual potential; Repeating the process of updating the group history optimal address until the maximum iteration number is reached, taking the group history optimal address with the maximum iteration number as an optimal SOP (self-service provider) address selection scheme, and taking the distribution network node association matrix with the maximum iteration number as a final distribution network node association matrix.
7. The flexible power distribution network interconnection device location and volume determining method according to claim 6, wherein the method comprises the following steps: the calculating of the cross-region mutual potential score of the current generation SOP site selection scheme comprises the following steps: Analyzing the SOP addressing scheme of the current generation into a power distribution network node pair set connected with SOP, calculating a cross-platform mutual potential score of the SOP addressing scheme of the current generation according to the power distribution network node pair set, and expressing the cross-platform mutual potential score according to the following formula: In the formula, Represent the first A cross-site mutual potential score of the ith SOP site selection scheme, Indicating the preset total number of SOP installations, Representing a cross-site indication function, Belonging to different power supply areas =1, Belonging to the same power supply station area =0, Represent the first Node of power generation network And distribution network node Is used for the node association degree of the distribution network, Representing power distribution network nodes Is used for controlling the load active power of the (a), Representing power distribution network nodes Is used for the load active power of the (a).
8. The flexible power distribution network interconnection device location and volume determining method as claimed in claim 7, wherein the method comprises the following steps: Resolving the SOP addressing scheme of the current generation into a power distribution network node pair set connected with SOP comprises the following steps: Extracting all power distribution network nodes provided with SOP ports from the SOP site selection scheme of the current generation, and generating a selected power distribution network node set; In the selected power distribution network node set, iteratively selecting a pair of power distribution network nodes with the highest association strength between every two power distribution network nodes in the selected power distribution network node set Will be Determining a connection pair of an SOP; Removing distribution network nodes from a selected distribution network node set And distribution network node Repeating the process until the selected distribution network node set is empty, and obtaining an SOP connected distribution network node pair set formed by all the selected distribution network node pairs; Wherein, the Indicating that kth SOP is connected to node of power distribution network And distribution network node Between them.
9. The flexible power distribution network interconnection device location and volume determining method according to claim 1, wherein the method comprises the following steps: the minimum mutual capacity is expressed by the following formula: In the formula, Represents the minimum mutual capacity that the mth SOP must meet in the optimal SOP addressing scheme, Representing the safety factor of the capacity, , Representing node pairs Final distribution network node association degree, final distribution network node association matrix , Representing the number of nodes of the distribution network, Representing nodes Sum node Is a load active power difference of (a).
10. A flexible power distribution network interconnection device location and volume determining system for operating the flexible power distribution network interconnection device location and volume determining method as claimed in any one of claims 1-9, comprising: the incidence matrix module is used for acquiring the inter-power potential of the cross-region power and the electrical distance between the nodes of the power distribution network so as to generate an incidence matrix of the nodes of the power distribution network; The system comprises a power distribution network node incidence matrix, an address selection scheme generation module, a binary particle swarm optimization algorithm, a power distribution network node incidence matrix generation module and a power distribution network node incidence matrix generation module, wherein the power distribution network node incidence matrix is used for generating comprehensive selection probability of power distribution network nodes; the capacity-fixing scheme generation module is used for calculating the minimum mutual-aid capacity which each SOP must meet based on the optimal SOP site selection scheme and the final distribution network node association matrix, constructing and solving a capacity optimization model aiming at minimizing the total life cycle cost by taking the minimum mutual-aid capacity as a constraint, and outputting the optimal SOP capacity-fixing scheme.

Description

Flexible power distribution network interconnection device site selection and volume determination method and system Technical Field The invention belongs to the technical field of flexible power distribution networks, and particularly relates to a flexible power distribution network interconnection device site selection and volume determination method and system. Background The conventional flexible interconnection device planning method mostly takes the minimum comprehensive cost and the reduction of network loss as a single target in the site selection and volume determination stage, and ignores the influence of SOP access positions and capacities on the long-term load balancing capacity of the power distribution system. This results in a planning scheme that lacks the ability to support the distribution system load balancing from the physical topology level in the face of non-sourced load mismatch, which in turn results in transformers and feeders being exposed to long-term heavy overload risks, reducing the service life of critical equipment. The conventional planning research is mainly aimed at planning flexible interconnection devices among internal feed lines of a single station, and the value of establishing a cross-station flexible resource mutual-aid path among different stations by SOP is not considered. The method has the advantages that when SOP capacity is planned, the local adjusting effect of spare flexible resources of adjacent areas is ignored, the overall cost of power distribution network transformation is obviously improved, and the economic requirement is difficult to meet. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a flexible power distribution network interconnection device site selection and volume determination method and system, which solve the technical problem that the prior art lacks of local adjustment by neglecting surplus flexible resources of adjacent areas when supporting power distribution system load balance from a physical topology layer and planning SOP capacity. According to the invention, a node association matrix of the power distribution network is constructed through mutual aid of electric distance and cross-platform load, a Binary PARTICLE SWARM Optimization (BPSO) algorithm is cooperatively improved by adopting a quantum walking mechanism to conduct intelligent site selection, an optimal SOP site selection scheme is generated, the minimum mutual aid capacity which each SOP must meet is calculated based on the optimal SOP site selection scheme, a DE (DIFFERENTIAL EVOLUTION) algorithm is driven to provide an improvement direction which accords with an actual flexible interconnection scene, a capacity Optimization model is solved, and an optimal SOP site selection scheme and an optimal capacity fixing scheme based on the optimal SOP site selection scheme are generated. The invention adopts the following technical scheme. The invention provides a flexible power distribution network interconnection device location and volume-fixing method, which comprises the following steps: acquiring cross-platform power mutual potential and electrical distances among power distribution network nodes to generate a power distribution network node association matrix; the method comprises the steps of generating comprehensive selection probability of power distribution network nodes based on a power distribution network node incidence matrix, taking nodes with the comprehensive selection probability larger than a preset probability threshold as a preliminary SOP (self-service provider) addressing scheme, carrying out incidence enhancement on the preliminary SOP addressing scheme based on the power distribution network node incidence matrix, and generating an enhanced SOP addressing scheme; And constructing and solving a capacity optimization model aiming at minimizing the total life cycle cost by taking the minimum mutual capacity as a constraint, and outputting an optimal SOP constant volume scheme. Preferably, generating a node association matrix of the power distribution network,Representing the number of nodes of the distribution network,The distribution network node association degree between the distribution network node a and the distribution network node b is represented by the following formula: In the formula, ,Represents the cross-site association weight coefficient,Representing the electrical proximity between distribution network node a and distribution network node b, expressed by the following formula: In the formula, Indicating the minimum electrical distance of the whole network,Indicating that the divide-by-zero constant is prevented,Representing the electrical distance between distribution network node a and distribution network node b,The power mutual potential of the cross-platform region between the power distribution network node a and the power distribution network node b is represented by the following formu