CN-121984014-A - Configuration optimization method, device, terminal and medium for flexible interconnection device of power distribution network

CN121984014ACN 121984014 ACN121984014 ACN 121984014ACN-121984014-A

Abstract

The application discloses a configuration optimization method, a device, a terminal and a medium for a flexible interconnection device of a power distribution network. And constructing a load moment association model of the association relation between the load moment parameters and the power distribution network operation parameters based on the load moment parameters, constructing a multi-objective optimization model based on load moment parameter weighting based on the load moment association model, and obtaining an SOP configuration optimization scheme by solving the model. According to the scheme, the load moment parameters are introduced, the load moment association model and the multi-objective optimization model based on the load moment parameter weighting are constructed, and the space distribution characteristics of the load in the power distribution network and the influence of the space distribution characteristics on the system operation are fully considered, so that in an active power distribution network containing a high-proportion distributed power supply, the situation that an optimization result falls into local optimum can be avoided, and the configuration of the flexible interconnection device of the power distribution network is more accurately optimized.

Inventors

WANG CHAO
MIAO CHENYU
ZHANG YONG
LUO ZHILING
HOU ZUFENG
LIN GUIHUI
YANG RUIXIONG
LIU XINGJIAN
YAN JIADONG
FENG MINGQIAN

Assignees

广东电网有限责任公司珠海供电局

Dates

Publication Date: 20260505
Application Date: 20260129

Claims (10)

1. The configuration optimization method for the flexible interconnection device of the power distribution network is characterized by comprising the following steps of: acquiring topological structure information of a power distribution network, and acquiring power distribution network data based on the topological structure information, wherein the power distribution network data comprises line impedance and node load power; calculating load moment parameters of all nodes in the power distribution network according to the power distribution network data; Based on the load moment parameters, constructing a load moment association model, wherein the load moment association model comprises an association relation between the load moment parameters and power distribution network operation parameters, and the power distribution network operation parameters comprise node voltage deviation, load moment weighted operation cost and SOP injection power; And constructing a multi-objective optimization model based on load moment parameter weighting based on the load moment correlation model so as to obtain an SOP configuration optimization scheme through solving the multi-objective optimization model.
2. The power distribution network flexible interconnection device configuration optimization method according to claim 1, wherein the calculation formula of the load moment parameter is as follows: In the formula, Is a node Is used for the load moment parameters of the (a), Is a node Is provided with a set of associated branches, Is a node To the point of Is used for the electrical distance of (a), Is a node Active load power of (a); Is a node Is used for the reactive load power of the (a).
3. The power distribution network flexible interconnection device configuration optimization method according to claim 1, wherein the load moment association model is specifically: In the formula, Is a node Is used for the load moment parameters of the (a), Is a node Is set to be equal to or less than the threshold voltage variation, As a factor of the dependence of the load moment parameter on the voltage sensitivity, The running costs are weighted for the load moment, Is a node The active loss of the associated branch is such that, As a total number of nodes, As the weight coefficient of the network loss, As the weight coefficient of the voltage deviation, The load moment parameters are corrected after SOP access, At node for SOP The active power of the injection is such that, For SOP access point to node Is used for the electrical distance of (a), Is a correction coefficient.
4. A method for optimizing the configuration of a flexible interconnection device for a power distribution network according to claim 3, further comprising: Calculating an error index by using the node voltage deviation obtained by the load moment correlation model and the reference node voltage deviation obtained by the power flow simulation, wherein the calculation formula of the error index is as follows: In the formula, As an index of the error there is provided, For the voltage deviation of the node in question, A voltage deviation for the reference node; and when the error index does not meet a preset convergence condition, performing coefficient optimization on the load moment association model according to the error index until the error index of the load moment association model meets the convergence condition, so as to obtain an optimized load moment association model.
5. The method for optimizing configuration of flexible interconnection devices of a power distribution network according to claim 1, wherein the multi-objective optimization model is specifically an optimization model of a double-layer optimization structure, wherein an upper-layer optimization sub-model is configured with an objective function aiming at minimizing comprehensive cost of the power distribution network, a lower-layer optimization sub-model is configured with an objective function aiming at minimizing weighted running cost of load moment, and constraint conditions of the lower-layer optimization sub-model configuration include power flow constraint, node voltage constraint, branch current constraint, SOP capacity constraint and power balance constraint.
6. The power distribution network flexible interconnection device configuration optimization method according to claim 5, wherein the objective function of the multi-objective optimization model is specifically: In the formula, For the comprehensive cost of the power distribution network, Investment and maintenance costs for the SOP equipment; For the total operating cost of the distribution network, The running cost is weighted for the load moment of the period T, T being the total number of periods, Is a node Is used for the load moment parameters of the (a), For a period of time Electricity price of (2); Penalty coefficients for voltage deviation; For a period of time Node Is associated with the branch active loss; For a period of time Node Voltage deviation of (2).
7. The method for optimizing configuration of a flexible interconnection device of a power distribution network according to claim 1, wherein the obtaining an SOP configuration optimization scheme by solving the multi-objective optimization model includes: Converting the multi-objective optimization model into a mixed integer second order cone planning model; And solving the mixed integer second-order cone planning model by using a simulated annealing optimization algorithm embedded with a second-order cone planning solver so as to obtain an SOP configuration optimization scheme according to a solving result.
8. A power distribution network flexible interconnect device configuration optimizing device, comprising: The power distribution network data acquisition unit is used for acquiring topological structure information of a power distribution network and acquiring power distribution network data based on the topological structure information, wherein the power distribution network data comprises line impedance and node load power; The load moment parameter calculation unit is used for calculating load moment parameters of all nodes in the power distribution network according to the power distribution network data; The load moment association model construction unit is used for constructing a load moment association model based on the load moment parameters, wherein the load moment association model comprises an association relation between the load moment parameters and power distribution network operation parameters, and the power distribution network operation parameters comprise node voltage deviation, load moment weighted operation cost and SOP injection power; And the optimization model solving unit is used for constructing a multi-objective optimization model based on the load moment parameter weighting based on the load moment association model so as to obtain an SOP configuration optimization scheme through solving the multi-objective optimization model.
9. The configuration optimization terminal of the flexible interconnection device of the power distribution network is characterized by comprising a memory and a processor; the memory is used for storing program codes, and the program codes correspond to the configuration optimizing method of the flexible interconnection device of the power distribution network according to any one of claims 1 to 7; The processor is used for reading and executing the program codes to realize the configuration optimization method of the flexible interconnection device of the power distribution network.
10. A computer readable storage medium, wherein the computer readable storage medium stores program code for being read and executed by a processor to implement the power distribution network flexible interconnect arrangement configuration optimization method of any of claims 1 to 7.

Description

Configuration optimization method, device, terminal and medium for flexible interconnection device of power distribution network Technical Field The application relates to the technical field of power distribution networks, in particular to a power distribution network flexible interconnection device configuration optimization method, device, terminal and medium. Background SOP (Soft Open Point) is used as a typical flexible interconnection device, and voltage distribution and operation economy of a power distribution network can be effectively improved through active and accurate tide regulation and control. However, existing SOP configuration optimization methods still face significant challenges in active distribution networks that contain a high proportion of distributed power sources. The traditional planning model is usually optimized by taking a single index (such as minimum system network loss) as a target, and cannot fully consider the uneven distribution of the load in space and the differential influence of the uneven distribution on the configuration effect of the device, and particularly, the quantitative modeling and analysis of the key physical quantity of the load moment are lacking, so that the optimization result is easily caused to be in local optimum in the actual application process, and the overall economic operation and the voltage quality improvement of the power distribution network are difficult to realize. Disclosure of Invention The application provides a configuration optimization method, device, terminal and medium for a flexible interconnection device of a power distribution network, which are used for achieving the purposes of optimizing the configuration of the flexible interconnection device of the power distribution network, coordinating economic operation cost and improving voltage quality, and improving adaptability and accuracy of an optimization scheme. In order to achieve the above object, a first aspect of the present application provides a configuration optimization method for a flexible interconnection device of a power distribution network, including: acquiring topological structure information of a power distribution network, and acquiring power distribution network data based on the topological structure information, wherein the power distribution network data comprises line impedance and node load power; calculating load moment parameters of all nodes in the power distribution network according to the power distribution network data; Based on the load moment parameters, constructing a load moment association model, wherein the load moment association model comprises an association relation between the load moment parameters and power distribution network operation parameters, and the power distribution network operation parameters comprise node voltage deviation, load moment weighted operation cost and SOP injection power; And constructing a multi-objective optimization model based on load moment parameter weighting based on the load moment correlation model so as to obtain an SOP configuration optimization scheme through solving the multi-objective optimization model. Preferably, the calculation formula of the load moment parameter is: In the formula, Is a nodeIs used for the load moment parameters of the (a),Is a nodeIs provided with a set of associated branches,Is a nodeTo the point ofIs used for the electrical distance of (a),Is a nodeActive load power of (a); Is a node Is used for the reactive load power of the (a). Preferably, the load moment association model is specifically: In the formula, Is a nodeIs used for the load moment parameters of the (a),Is a nodeNode voltage deviations of (a); as a factor of the dependence of the load moment parameter on the voltage sensitivity, The running costs are weighted for the load moment,Is a nodeThe active loss of the associated branch is such that,As a total number of nodes,As the weight coefficient of the network loss,As the weight coefficient of the voltage deviation,The load moment parameters are corrected after SOP access,At node for SOPThe active power of the injection is such that,For SOP access point to nodeIs used for the electrical distance of (a),Is a correction coefficient. Preferably, the method further comprises: Calculating an error index by using the node voltage deviation obtained by the load moment correlation model and the reference node voltage deviation obtained by the power flow simulation, wherein the calculation formula of the error index is as follows: In the formula, As an index of the error there is provided,For the voltage deviation of the node in question,A voltage deviation for the reference node; and when the error index does not meet a preset convergence condition, performing coefficient optimization on the load moment association model according to the error index until the error index of the load moment association model meets the convergence condition, so as to obtain an optimized