含逆变型分布式电源的配电网自适应正序电流速断保护

CHEN Xiaolong

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含逆变型分布式电源的配电网自适应正序电流速断保护

更新时间：2025-08-13

- 含逆变型分布式电源的配电网自适应正序电流速断保护
- Automation of Electric Power Systems Vol. 39, Issue 9, Pages: 107-112(2015)
- 作者机构：
  
  天津大学智能电网教育部重点实验室,天津市,300072
- 作者简介：
- 基金信息：
- DOI：
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- Published：2015
- 稿件说明：
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CHEN Xiaolong. [J]. Automation of electric power systems, 2015, 39(9): 107-112.
DOI：

CHEN Xiaolong. [J]. Automation of electric power systems, 2015, 39(9): 107-112. DOI：

摘要

在故障情况下，光伏发电系统等逆变型分布式电源(IBDG)的输出电流与IBDG的容量或出力、故障类型以及故障位置等均有关，这将导致传统配电网电流保护的定值较难整定。自适应电流保护可有效解决这一问题。根据含IBDG的配电网故障特性，分析了原有自适应电流保护存在的问题。此外，考虑到IBDG仅存在于正序网络中，通过分析不同位置处发生两相相间短路故障和三相短路故障时保护安装处的正序电压和流过保护的正序电流之间的关系，提出了适用于含IBDG配电网的自适应正序电流速断保护，改善了保护的性能。最后，通过对一个含IBDG的10 kV配电网的仿真分析，验证了该保护的有效性。

Abstract

Under fault conditions

inverter-based distributed generator (IBDG)

such as photovoltaic power generation system

generates different amount of current

and its value depends on IBDG’s capacity or output power

fault types

fault location and so on. This makes it hard to achieve its setting for a traditional current relaying. In order to solve the problem

adaptive instantaneous trip protection is an effective way. According to the fault characteristics of the distribution network with IBDG

the possible problems of the traditional adaptive current instantaneous protection are analyzed. Considering that the IBDG only exists in the positive-sequence network

an adaptive instantaneous trip protection scheme based on positive-sequence current is proposed to improve its performance by analyzing the relationship between the positive-sequence voltage and positive-sequence current with different fault locations for line-to-line fault and three-phase fault. Finally

the effectiveness of the proposed protection strategy is verified by simulation results of a10 kV distribution network with IBDG. This work is supported by National Basic Research Program of China (973 Program) (No. 2009CB219704)

National Natural Science Foundation of China (No. 51177108) and China Southern Power Grid (No. K-KY2013-116).

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