适用于含分布式电源配电网的纵联保护方案

XU Sixuan

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适用于含分布式电源配电网的纵联保护方案

更新时间：2025-08-13

- 适用于含分布式电源配电网的纵联保护方案
- Automation of Electric Power Systems Vol. 39, Issue 9, Pages: 113-118(2015)
- 作者机构：
  
  东南大学电气工程学院,江苏省,南京市,210096
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2015
- 稿件说明：
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XU Sixuan. [J]. Automation of electric power systems, 2015, 39(9): 113-118.
DOI：

XU Sixuan. [J]. Automation of electric power systems, 2015, 39(9): 113-118. DOI：

摘要

针对含分布式电源（DG）配电网，在对线路相间短路故障分析的基础上，得出在规定的DG渗透率及逆变器输出电流限制下，故障线路两侧电流幅值不相等的结论。基于故障线路两侧电流幅值差异提出适用于含DG配电网的新型纵联保护方案。保护判断所需电气量为线路两侧故障电流幅值以及保护线路外侧的等效测量阻抗。判据的实现不依靠采样值同步环节，与传统纵联差动保护相比对通信系统要求较低。同时，算法对逆变型DG等值模型不确定性也进行了一定的考虑，以保证新方案的实用性和正确性。

Abstract

A new pilot protection algorithm for distribution network with distributed generators （DGs） is proposed. By analyzing fault current amplitude characteristic of distribution network with DGs

a conclusion is confirmed that current amplitudes are significantly different under ordinary DG penetration. And the conclusion supports the new idea that current amplitude difference can be used to distinguish fault condition in distribution network with DGs. The only needed information is the measured impedance of equivalent source and current amplitude of the other end

and no compulsory phase synchronization is needed. The new method tolerates the calculating error caused by inverter-based distributed generator and is practical. This work is supported by National Natural Science Foundation of China (No. 51377022

No. 50977012).

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