Fault Location and Protection Method for DC Power Grid Based on BP Neural Network

JIANG Yuan; LI Qing; FENG Qian; GUO Lin; CUI Jiarui; SHA Guanglin

doi:10.13296/j.1001-1609.hva.2020.08.005

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Fault Location and Protection Method for DC Power Grid Based on BP Neural Network

更新时间：2025-04-26

- Fault Location and Protection Method for DC Power Grid Based on BP Neural Network
- High VoltageApparatus Vol. 56, Issue 8, Pages: 23-28(2020)
- 作者机构：
  
  1. 北京科技大学自动化学院工业过程知识自动化教育部重点实验室
  2. 中国电力科学研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.08.005
  CLC： TP183;TM721.1
- Published：2020
- 稿件说明：
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[1]蒋原,李擎,冯茜,郭琳,崔家瑞,沙广林.基于BP神经网络的直流电网故障定位与保护方法[J].高压电器,2020,56(08):23-28.

JIANG Yuan, LI Qing, FENG Qian, et al. Fault Location and Protection Method for DC Power Grid Based on BP Neural Network[J]. High voltageapparatus, 2020, 56(8): 23-28.
[1]蒋原,李擎,冯茜,郭琳,崔家瑞,沙广林.基于BP神经网络的直流电网故障定位与保护方法[J].高压电器,2020,56(08):23-28. DOI： 10.13296/j.1001-1609.hva.2020.08.005.

JIANG Yuan, LI Qing, FENG Qian, et al. Fault Location and Protection Method for DC Power Grid Based on BP Neural Network[J]. High voltageapparatus, 2020, 56(8): 23-28. DOI： 10.13296/j.1001-1609.hva.2020.08.005.

摘要

灵活的交直流混合电网将成为未来电网中的重要环节

其故障定位方法和保护方法是保障电网安全、稳定、可靠运行的基础。但是

目前直流电网的故障辨识方法不易判断故障发生时间、位置

导致难以形成稳健的保护策略。文中首先分析了直流电网中广泛存在的多类故障影响

提出了基于电流、电流变化率等特征的神经网络模型的实时故障诊断方法;然后

在混合式双极性直流断路器上利用反时限过流保护策略

隔离故障区域;最后

通过MATLAB/Simulink仿真

验证了该保护方案可以有效、准确、快速地定位、隔离故障区域

有利于提高直流电网运行的可靠性。

Abstract

Flexible AC/DC hybrid grid will become an important link in the future power grid. The fault location method and protection method are the basis to ensure safe

stable and reliable operation of power grid. However

the fault identification methods of DC power grid are not easy to determine the time and location of a fault

which makes it difficult to form a robust protection strategy. This paper analyses the influences of many kinds of faults widely existing in DC power grid

and proposes a real-time fault diagnosis method based on BP neural network model with current and current change rate characteristics. Then

the fault area is isolated by using inverse-time overcurrent protection strategy on hybrid bipolar DC circuit breaker. MATLAB/Simulink simulation verifies that the protection scheme can locate and isolate the fault area effectively

accurately and quickly

and is conducive to improving the reliability of DCpowergridoperation.

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