Study on Reactive Power Optimization Method with Large Scale Access Condition of Cables in Urban Distribution Network

XING Jie; CAO Ruilin

doi:10.14044/j.1674-1757.pcrpc.2021.01.006

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Study on Reactive Power Optimization Method with Large Scale Access Condition of Cables in Urban Distribution Network

更新时间：2024-09-14

- Study on Reactive Power Optimization Method with Large Scale Access Condition of Cables in Urban Distribution Network
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 1, Pages: 32-38(2021)
- 作者机构：
  
  东华大学信息科学与技术学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.01.006
  CLC： TM714.3
- Published：2021，
- 稿件说明：
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[1]邢洁,曹瑞琳.城市配电网中电缆大规模接入条件下的无功优化方法研究[J].电力电容器与无功补偿,2021,42(01):32-38.

XING JIE, CAO RUILIN. Study on Reactive Power Optimization Method with Large Scale Access Condition of Cables in Urban Distribution Network. [J]. Power capacitor & reactive power compensation, 2021, 42(1): 32-38.
[1]邢洁,曹瑞琳.城市配电网中电缆大规模接入条件下的无功优化方法研究[J].电力电容器与无功补偿,2021,42(01):32-38. DOI： 10.14044/j.1674-1757.pcrpc.2021.01.006.

XING JIE, CAO RUILIN. Study on Reactive Power Optimization Method with Large Scale Access Condition of Cables in Urban Distribution Network. [J]. Power capacitor & reactive power compensation, 2021, 42(1): 32-38. DOI： 10.14044/j.1674-1757.pcrpc.2021.01.006.

摘要

目前大型城市电网负荷低谷时段容性无功倒送现象日益凸显

危及电网安全稳定运行。基于此背景

研究了城市配电网中电缆大规模接入条件下的无功优化方法。首先

分析无功倒送对节点功率因数的影响

建立了考虑功率因数约束的含电抗器和电容器的综合无功优化模型

模型以有功网损最小为目标函数

在传统无功优化约束基础上增加了节点功率因数约束和电抗器投切容量约束;然后

利用基于网损无功灵敏度的改进遗传算法求解所建模型

求得的优化方案通过协调配电网感性和容性无功补偿设备投切以解决电缆大规模接入时的无功倒送和功率因数越限问题;最后

以典型的高压配电网作为算例验证模型和算法的有效性。

Abstract

At present

capacitive reactive power reversal is becoming increasingly prominent in the period of light load in large urban network

which endangers the safe and stable operation of power grid. Based on this background

the reactive power optimization method of distribution network with access of large-scale cables is studied. The influence of reactive power reversal on nodal power factor is analyzed and an integrated reactive power optimization model with consideration of power factor constraints（containing reactor and capacitor）is established. The minimization of the real power loss is the objective function of the model. The constrains of node power factor and switching capacity of reactor are added based on traditional reactive power constraints. Then

an improved genetic algorithm with loss sensitivity is used to solve the model. By coordinating the switching of reactors and capacitors in distribution network

the optimized scheme can avoid reactive power reversal and power factor exceeding the limit with large-scale cables access. Finally

a typical high-voltage distribution network is used as an example to verify the effectiveness of the model and algorithm.

关键词

无功优化功率因数改进遗传算法高压配电网

Keywords

reactive power optimizationpower factorimproved genetic algorithmhigh voltage distribution network

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