计及分布式电源接入的配电网静态电压稳定性评估方法

ZHANG Qian

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计及分布式电源接入的配电网静态电压稳定性评估方法

更新时间：2025-08-13

- 计及分布式电源接入的配电网静态电压稳定性评估方法
- Automation of Electric Power Systems Vol. 39, Issue 15, Pages: 42-48(2015)
- 作者机构：
  
  武汉大学电气工程学院,湖北省,武汉市,430072
- 作者简介：
- 基金信息：
- DOI：
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- Published：2015
- 稿件说明：
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ZHANG Qian. [J]. Automation of electric power systems, 2015, 39(15): 42-48.
DOI：

ZHANG Qian. [J]. Automation of electric power systems, 2015, 39(15): 42-48. DOI：

摘要

为研究分布式电源(DG)接入对配电网静态电压稳定的影响问题

推导了能反映配电网各负荷节点电压稳定程度的电压稳定指标

提出了一种针对配电网的负荷增长策略

对DG接入前后全网最薄弱节点以及整个系统的静态电压稳定性进行了定量分析

结合PV曲线探讨了配电网电压崩溃事故的发生机理

对比分析了DG出力波动性较大时

集中接入和分散接入方式对静态电压稳定性的改善效果。所提的基于系统各节点电压稳定指标计算的静态电压稳定性分析方法可对负荷节点电压稳定裕度进行快速排序

并可实现全网薄弱节点的准确定位。DG接入前后的仿真实验结果表明

合理位置的DG接入可有效改善全网的静态电压稳定性。

Abstract

In order to study the impact of inter-connection of distributed generators (DGs) on steady state voltage stability of distribution network

the voltage stability index (VSI) capable of reflecting the degree of voltage stability of all load buses in distribution network is derived. A new load increase strategy for distribution network is proposed to quantitatively analyze the voltage stability of the weakest bus and the whole system. Causes of distribution network voltage collapse are discussed using PV curves

and the effects on steady state voltage stability in centralized and distributed inter-connection mode are compared when DG output varies dramatically. Furthermore

a voltage stability analysis method based on the calculation of VSI value of all buses is proposed to rapidly rank the voltage stability margin of load buses as well as accurately locate the weakest bus. Simulation results prove that rational location of DG inter-connection is expected to improve voltage stability of the entire network. This work is supported by Post-doctoral Science Foundation of China (No. 2014M552080) and State Grid Corporation of China (No. 5211011400BT).

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