CN-121984115-A - User flexible load resource scheduling method for improving utilization rate of distribution network equipment and electronic equipment

CN121984115ACN 121984115 ACN121984115 ACN 121984115ACN-121984115-A

Abstract

The invention relates to a user side flexible load resource scheduling method for improving the utilization rate of distribution network equipment and electronic equipment, wherein the method comprises the steps of obtaining distribution network architecture parameters and distribution network utilization rate indexes; and solving the adjustable load resource optimal scheduling model by adopting a hunger game search algorithm to obtain a user side flexible load resource optimal adjustment strategy guided by the time-sharing electricity price, wherein the user side flexible load resource optimal adjustment strategy is guided by the time-sharing electricity price and can meet the normal operation of the distribution network and improve the utilization rate of the distribution network equipment. Compared with the prior art, the method aims at improving the utilization rate of the power distribution network equipment, stimulates the flexible load of the user side to consume distributed electric energy nearby by price means, reduces the reverse transmission condition of the distribution network line, and improves the utilization rate of the comprehensive distribution network equipment while fully utilizing the adjustable load resource of the user side.

Inventors

ZHU CHAO
YING QI
HUANG JINGJING
LIANG RONGHUA
CHEN XILIN
LIN LING
Wu Longdong
JIANG XUEBIN
ZHANG BO
LIU FUYAN
DAI PAN
MENG JIAN
HU ZHECHENG
YANG XIAOYONG
Ge Yuda

Assignees

国网浙江省电力有限公司经济技术研究院
国网浙江省电力有限公司

Dates

Publication Date: 20260505
Application Date: 20251230

Claims (10)

1. A flexible load resource scheduling method of a user side for improving the utilization rate of distribution network equipment is characterized by comprising the following steps: Acquiring power distribution network architecture parameters and power distribution network utilization indexes; Based on the power distribution network architecture parameters and the power distribution network utilization index, constructing an adjustable load resource optimization scheduling model, wherein the adjustable load resource optimization scheduling model comprises an upper model considering time-of-use electricity price and a lower model considering power distribution network operation; and solving the adjustable load resource optimization scheduling model by adopting a hunger game searching algorithm to obtain a user side flexible load resource optimal adjustment strategy which is guided by the time-sharing electricity price and meets the normal operation of the distribution network and improves the utilization rate of the distribution network equipment.
2. The flexible load resource scheduling method for a user side for improving the utilization rate of distribution network equipment according to claim 1, wherein the evaluation indexes of the utilization rate of the distribution network equipment comprise a transformer utilization efficiency index, a line utilization efficiency index and a distributed access influence rate index, wherein the transformer utilization efficiency index comprises a variable capacitance load ratio, a transformer load ratio and a transformer light/heavy/overload ratio, the line utilization efficiency index comprises a line load ratio, a line reverse transmission ratio and a line light/heavy/overload ratio, and the distributed access influence rate index comprises a distributed power capacity ratio and a distributed power spontaneous utilization rate.
3. The flexible load resource scheduling method for improving the utilization rate of the distribution network equipment according to claim 1, wherein the upper model considering the time-of-use electricity price aims at increasing the utilization rate of the distribution network equipment, and the objective function expression is as follows: Wherein, the Is the weight coefficient of each distribution network utilization index, Is the value of the utilization index of each distribution network, 、 And Is a weight coefficient of the multi-objective optimization, The original time-sharing electricity price is obtained, The time-sharing electricity price is adjusted, The total load power of the power distribution network at the moment t; The constraint condition of the upper model considering the time-of-use electricity price comprises time-of-use electricity price adjustment range constraint, and the expression is as follows: Wherein, the Is the minimum value of the time-of-use electricity price, Is the maximum value of the time-of-use electricity price, The time-sharing electricity price.
4. The method for scheduling flexible load resources on a user side for improving utilization rate of a distribution network device according to claim 1, wherein the lower model considering distribution network operation targets at minimum network loss, comprises a flexible load adjustment policy optimization sub-model and a distribution network operation optimization sub-model, wherein, The objective function of the flexible load adjustment strategy optimization sub-model is as follows: Wherein, the Is the active power consumed by the matched energy storage user at the time t, Is the dynamic adjustment of the power of the load at time t, The time-sharing electricity price at the moment t; constraint conditions of the flexible load adjustment strategy optimization sub-model are as follows: Wherein, the Is the flexible load power with adjustable t moment, Is the maximum load power which can be increased at the moment t; The objective function of the distribution network operation optimization sub-model is as follows: Wherein, the Is the square of the current flowing on the t-th period line ij, Is the resistance of the line ij, Is a set of distribution network lines ij, and T is a time period of a distribution network reconstruction interval; Constraint conditions of the distribution network operation optimization sub-model comprise node power balance constraint, node voltage constraint, node current constraint and maximum transmission power constraint.
5. The flexible load resource scheduling method of the user side for improving the utilization rate of the distribution network equipment according to claim 1, wherein the solving the adjustable load resource optimization scheduling model by adopting a hunger game search algorithm specifically comprises: the adjusted time-sharing electricity value is used as a living thing in a hunger game search algorithm, an adaptability value of the living thing is built based on the utilization rate of distribution network equipment and the difference value of investment recovery of power transmission and distribution assets before and after time-sharing electricity price adjustment, the hunger game search algorithm is adopted to iteratively solve the adjustable load resource optimization scheduling model, and a flexible load resource optimal adjustment strategy at a user side is obtained; The calculation of the difference value of the investment recovery of the power transmission and distribution assets before and after the utilization rate of the distribution network equipment and the time-sharing electricity price adjustment is specifically as follows: Obtaining a user side flexible load resource optimal adjustment strategy and a distribution network operation optimization result according to the current time-sharing electricity value after adjustment and the lower model; And calculating and obtaining the utilization rate of distribution network equipment and the difference value of the investment recovery of the power transmission and distribution assets before and after the time-sharing electricity price adjustment according to the distribution network operation optimization result.
6. The flexible load resource scheduling method for improving the utilization rate of a distribution network device according to claim 5, wherein in the hunger game search algorithm, the update formula of living things is expressed as: Wherein, the 、 Is a random number uniformly distributed in the interval of [0,1], To obey a standard normal distribution of random numbers, For the optimal location of the individual, For the individual position at the nth iteration, l is a super parameter, E is a variation control of all positions, R is a biological search range, And Is starvation weight.
7. The flexible load resource scheduling method for improving utilization rate of distribution network equipment on user side according to claim 6, wherein the starvation weight is And The calculation formula of (2) is as follows: Wherein N is the size of the population, 、 Is a random number uniformly distributed in the interval of [0,1 ]; Wherein, the Is a random number uniformly distributed in the interval of [0,1], Is an intermediate parameter.
8. The flexible load resource scheduling method for improving utilization rate of distribution network equipment on user side according to claim 7, wherein the intermediate parameter is The determined formula of (2) is: wherein TH and LH are the upper limit and the lower limit of the starvation value, Is a random number uniformly distributed in the interval of [0,1], Is the fitness of the ith organism, Is the optimal fitness.
9. The flexible load resource scheduling method of the user side for improving the utilization rate of the distribution network equipment according to claim 8, wherein the determining formula of the upper limit TH of the starvation value is: Where UB and LB are the upper and lower limits of the weight search space, WF is the worst fitness, Is a random number uniformly distributed in the [0,1] interval.
10. An electronic device comprising one or more processors, memory, and one or more programs stored in the memory, the one or more programs comprising instructions for performing the user-side flexible load resource scheduling method for distribution network device utilization enhancement of any of claims 1-9.

Description

User flexible load resource scheduling method for improving utilization rate of distribution network equipment and electronic equipment Technical Field The invention relates to the technical field of operation and control of power systems, in particular to a user side flexible load resource scheduling method and electronic equipment for improving the utilization rate of distribution network equipment. Background The novel power distribution system has the characteristic of high permeability of the distributed power supply, can meet the low carbonization target of the future power system development, but the distributed power supply development is too rapid, and the distributed photovoltaic bearing capacity of the current distribution network is insufficient. From historical data, current power distribution network equipment has low utilization rate, such as a proportion of 10 kilovolt transformer and line maximum load rate below 20% is about 20%. Meanwhile, due to the characteristics of strong randomness and volatility of the distributed photovoltaic, the power distribution network equipment cannot be in a working condition with high utilization rate for a long time, and after the power distribution network is widely connected, the peak-valley difference of network supply load can be increased, so that the equipment utilization rate of the power distribution network can be further reduced. And the capacity value of the distributed power supply is not easy to determine, and more spare capacity is reserved when the system is planned and built, so that part of equipment is idle for a certain time. The increase of load peak-valley difference and reserve increase are unfavorable for fully utilizing the power distribution network equipment. The existing source network load storage integrated technology can fully excavate and release load side adjustment potential, enrich power grid adjustment resources, improve system balance capacity and improve the utilization rate of distribution network equipment. For example, the literature 'evaluation index and lifting measure of the full life cycle utilization rate of power distribution network equipment' (Zhang Bei, zhang Xueying, what is done with the electromechanical engineering technology, 2016,45 (02): 75-80.) systematically researches an index system of the utilization rate of the power distribution network equipment, wherein the index system comprises indexes of different side surfaces such as load rate, capacity ratio, capacity factor and full cycle utilization rate, and the index system provides guidance for planning and operation management of a power grid. The literature (Yang Lei, zhao Ping, zhong Hao, and the like; energy engineering, 2024,44 (01): 108-116.) establishes a set of source-to-charge matching evaluation method considering the utilization rate of the power distribution network equipment, establishes a source-to-charge matching evaluation model comprising fluctuation matching degree, electricity matching degree, absorption matching degree and load deviation degree, and judges the influence degree of the distributed photovoltaic grid connection on the utilization rate of the equipment. The literature 'influence analysis of source load storage access on the utilization rate of power distribution network equipment' (Lu Kaibin. Popular power utilization, 2024,39 (12): 32-33.) is mainly used for analyzing the influence of grid connection on the utilization rate of equipment aiming at three source load storage objects of a distributed power supply, a charging load and energy storage. The literature "evaluation index and improvement measure for the utilization rate of the power distribution network equipment with photovoltaic access" (Yang Yang. University of North China electric power (Beijing), 2018.) is aimed at influencing factors and evaluation indexes of the utilization rate of the power distribution network equipment, and the improvement measure for the utilization rate of the power distribution network equipment is summarized from three layers of power distribution network operation management, planning construction, equipment purchase and operation maintenance, and the improvement measure for the utilization rate of the power distribution network equipment with photovoltaic access is provided. The literature 'method for improving the utilization rate of power distribution network equipment by considering flexible load' (Jiang Shi rhyme. Hunan university, 2019) provides a method for improving the utilization rate of a circuit by considering the flexible load aiming at the problem that the interaction of the flexible load and a power grid can affect the utilization rate of the circuit. Literature "Indices system and improvement measures of distribution network equipment utilization rate considering PV connection"（Zhang W.//IOP Conference Series: Materials Science and Engineering. IOP Publishing, 2018, 452(3): 032001.） summarizes the factors affectin