CN-122026523-A - Power distribution network power instruction tracking method and system

CN122026523ACN 122026523 ACN122026523 ACN 122026523ACN-122026523-A

Abstract

The invention relates to the technical field of power distribution network operation optimization, and discloses a power distribution network power instruction tracking method and system. The method comprises the steps of receiving first power instructions of all polymers issued by a distribution network layer, obtaining the first power instructions of all the polymers by solving an objective function comprising a power instruction decomposition error and a total polymer adjustment cost, decomposing each first power instruction according to the weight of a distributed resource to which the corresponding polymer belongs to obtain a second power instruction distributed to the distributed resource to which the corresponding polymer belongs, wherein the weight changes along with the change of the current state quantity of the distributed resource to which the corresponding polymer belongs, receiving and integrating the power boundary of the distributed resource to which the corresponding polymer belongs after executing the corresponding second power instruction to obtain the power feasible region of each polymer, and uploading each power feasible region to the distribution network layer. The invention provides reliable support for safe and stable operation of the power distribution network in a high-proportion distributed resource access scene.

Inventors

XU YONGHAI
YOU ZILONG
XIA TONG
ZHAN ZIYI
LIU FANGZHOU
HU XINWEI
CHENG XIANG
LI ZIYI
DU QIANYUN
LI YIHUI
ZHOU YANG
LIU LINPING
WANG YIFAN
HUANG HUI
ZHANG HANBING
WU XINHUA
ZHU XIAOMING
YE JICHAO
HUANG JIAN
LU WU

Assignees

国网浙江省电力有限公司丽水供电公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The utility model provides a distribution network power instruction tracking method which is characterized in that is applied to the distribution network that is constructed by joining in marriage net layer, polymer layer and resource layer cooperation, the polymer layer is as linking join in marriage net layer with the intermediate level of resource layer, the polymer layer contains a plurality of independent polymers, each the polymer is internal to integrate corresponding distributed resource, the method includes: Receiving a first power instruction of each polymer issued by the distribution network layer, wherein the first power instruction of each polymer is obtained by solving an objective function comprising a power instruction decomposition error and a total polymer adjustment cost; decomposing each first power instruction according to the weight of the distributed resource to which the corresponding polymer belongs to obtain a second power instruction distributed to the distributed resource to which the corresponding polymer belongs, wherein the weight changes along with the change of the current state quantity of the distributed resource to which the corresponding polymer belongs; And receiving and integrating the power boundary of each distributed resource to which each polymer belongs after executing the corresponding second power instruction to obtain a power feasible domain of each polymer, and uploading each power feasible domain to the distribution network layer.
2. The power distribution network power instruction tracking method according to claim 1, wherein the process of acquiring the first power instruction of each of the polymers includes: Constructing an objective function with the aim of minimizing a power instruction decomposition error and an aggregate adjustment total cost, wherein the power instruction decomposition error is quantified by a difference value of a sum of a distribution network objective power and an actual power of each aggregate, and the aggregate adjustment total cost comprises an up-regulation cost and a down-regulation cost of each aggregate; And solving the objective function by adopting a source-dual decomposition algorithm according to a pre-defined distribution network power flow constraint condition and a node voltage safety constraint condition to obtain the first power instruction of each polymer.
3. The method of claim 1, wherein the decomposing each of the first power instructions according to the weight of the distributed resource to which the aggregate belongs to obtain a second power instruction allocated to the distributed resource to which the aggregate belongs, includes: Based on the step of n times of instruction decomposition, obtaining a second power instruction distributed to the distributed resource to which each polymer belongs, wherein n is the number of the polymers; each instruction decomposition step includes: determining a plurality of callable distributed resources in the current aggregate based on the power demand of the power distribution network; and decomposing the first power instruction of the current aggregate according to the weight of each callable distributed resource to obtain a second power instruction distributed to the corresponding callable distributed resource.
4. A power distribution network power instruction tracking method according to claim 3, wherein said determining a number of callable distributed resources within the aggregate currently based on the power demand of the power distribution network comprises: when the power demand of the power distribution network is increased power, determining a plurality of resources which can provide positive power regulation capability in the current aggregation body as callable distributed resources; When the power demand of the power distribution network is reduced power, determining the resource which can provide negative power regulation capability in the aggregate as a callable distributed resource.
5. A power distribution network power instruction tracking method according to claim 3, wherein the decomposing the first power instruction of the current aggregate according to the weight of each callable distributed resource to obtain a second power instruction allocated to the corresponding callable distributed resource includes: Calculating a power interval and a weight of each callable distributed resource based on the real-time running state and the inherent running constraint of each callable distributed resource; Decomposing the first power instruction of the current aggregate according to the weight of each callable distributed resource to obtain an intermediate power instruction distributed to the corresponding callable distributed resource; And iteratively correcting each intermediate power instruction based on the power interval of each callable distributed resource to obtain a second power instruction distributed to the corresponding callable distributed resource.
6. The method of claim 5, wherein calculating the power interval and the weight for each of the callable distributed resources based on the real-time operating state and the inherent operating constraints of the callable distributed resources comprises: calculating the weight corresponding to the callable energy storage resource at least based on the current moment state of charge of the callable energy storage resource; calculating a weight corresponding to a callable photovoltaic resource based at least on available power of the callable photovoltaic resource; And calculating the weight of the callable load resource based on the maximum cutting machine and overload coefficient of the callable load resource and the available power.
7. The method of claim 1, wherein the process of obtaining the power feasible region of each polymer comprises: And performing algebraic superposition on the power boundary of each distributed resource to which the aggregate belongs after the second power instruction is executed to form a power feasible domain corresponding to the aggregate.
8. The utility model provides a distribution network power instruction tracking system, its characterized in that is applied to the distribution network that is cooperateed by joining in marriage net layer, polymer layer and resource layer, the polymer layer is as linking join in marriage net layer with the intermediate level of resource layer, the polymer layer contains a plurality of independent polymers, every in the polymer body all integrate corresponding distributed resource, the system includes: The instruction receiving module is used for receiving first power instructions of all the polymers issued by the distribution network layer, wherein the first power instructions of all the polymers are obtained by solving an objective function comprising a power instruction decomposition error and a total polymer adjustment cost; The instruction decomposition module is used for decomposing each first power instruction according to the weight of the distributed resource to which the corresponding polymer belongs to obtain a second power instruction which is distributed to the distributed resource to which the corresponding polymer belongs, wherein the weight changes along with the change of the current state quantity of the distributed resource to which the corresponding polymer belongs; And the feasible domain forming feedback module is used for receiving and integrating the power boundary of each distributed resource to which each polymer belongs after the power boundary corresponding to the second power instruction is executed to obtain the power feasible domain of each polymer, and uploading each power feasible domain to the distribution network layer.
9. The power distribution network power instruction tracking system of claim 8, wherein the instruction decomposition module comprises: the power instruction determining unit is used for obtaining a second power instruction distributed to the distributed resource to which each polymer belongs based on the step of decomposing n times of instructions, wherein n is the number of the polymers; each instruction decomposition step includes: determining a plurality of callable distributed resources in the current aggregate based on the power demand of the power distribution network; and decomposing the first power instruction of the current aggregate according to the weight of each callable distributed resource to obtain a second power instruction distributed to the corresponding callable distributed resource.
10. The power distribution network power instruction tracking system according to claim 9, wherein the decomposing the first power instruction of the current aggregate according to the weight of each callable distributed resource to obtain a second power instruction allocated to the corresponding callable distributed resource includes: Calculating a power interval and a weight of each callable distributed resource based on the real-time running state and the inherent running constraint of each callable distributed resource; Decomposing the first power instruction of the current aggregate according to the weight of each callable distributed resource to obtain an intermediate power instruction distributed to the corresponding callable distributed resource; And iteratively correcting each intermediate power instruction based on the power interval of each callable distributed resource to obtain a second power instruction distributed to the corresponding callable distributed resource.

Description

Power distribution network power instruction tracking method and system Technical Field The invention relates to the technical field of power distribution network operation optimization, in particular to a power distribution network power instruction tracking method and system. Background Along with the continuous improvement of the permeability of multiple distributed resources such as distributed photovoltaics, energy storage, adjustable loads and the like in a power distribution network, how to effectively coordinate the distributed resources to form resultant force, and accurately respond to the regulation and control demands of a system become an important challenge in the current power distribution network operation optimization field. The traditional power distribution network scheduling method is mainly divided into two types of centralized optimization and hierarchical independent control, wherein the two types of centralized optimization and hierarchical independent control have obvious defects that the centralized optimization needs to collect detailed operation data of a whole system, the centralized optimization is faced with huge communication transmission burden, decision delay is caused by huge calculation scale, rapid fluctuation of distributed resource output is difficult to adapt, and the hierarchical independent control is frequently caused by the fact that effective information interaction and model cooperation are lacked among layers, so that the problem that the actual execution capacity of an upper-layer optimization instruction and a lower-layer resource is not matched often occurs, the tracking deviation of a power instruction is large, and the adjustment potential of the distributed resource cannot be fully exerted. Disclosure of Invention In order to solve the problems of insufficient resource coordination, poor instruction feasibility, low tracking precision and the like in the prior art, the adjustment potential of the multi-element distributed resources is fully released, and the safe and efficient operation of the power distribution network under the high-proportion distributed resource access background is ensured, the invention provides a power instruction tracking method and system of the power distribution network. In a first aspect, an embodiment of the present invention provides a power instruction tracking method for a power distribution network, where the power instruction tracking method is applied to a power distribution network cooperatively constructed by a power distribution network layer, a polymer layer and a resource layer, where the polymer layer is used as an intermediate layer connecting the power distribution network layer and the resource layer, and includes a plurality of independent polymers, and each of the polymers is integrated with a corresponding distributed resource, and the method includes: Receiving a first power instruction of each polymer issued by the distribution network layer, wherein the first power instruction of each polymer is obtained by solving an objective function comprising a power instruction decomposition error and a total polymer adjustment cost; decomposing each first power instruction according to the weight of the distributed resource to which the corresponding polymer belongs to obtain a second power instruction distributed to the distributed resource to which the corresponding polymer belongs, wherein the weight changes along with the change of the current state quantity of the distributed resource to which the corresponding polymer belongs; And receiving and integrating the power boundary of each distributed resource to which each polymer belongs after executing the corresponding second power instruction to obtain a power feasible domain of each polymer, and uploading each power feasible domain to the distribution network layer. Preferably, the process of acquiring the first power instruction of each polymer includes: Constructing an objective function with the aim of minimizing a power instruction decomposition error and an aggregate adjustment total cost, wherein the power instruction decomposition error is quantified by a difference value of a sum of a distribution network objective power and an actual power of each aggregate, and the aggregate adjustment total cost comprises an up-regulation cost and a down-regulation cost of each aggregate; And solving the objective function by adopting a source-dual decomposition algorithm according to a pre-defined distribution network power flow constraint condition and a node voltage safety constraint condition to obtain the first power instruction of each polymer. Preferably, the decomposing each first power instruction according to the weight of the distributed resource to which the aggregate belongs to obtain a second power instruction allocated to the distributed resource to which the aggregate belongs, including: Based on the step of n times of instruction decomposition, obta