New Solution for Photovoltaic Station Collector Line Protection Based on Comprehensive Harmonic Drive

doi:10.11930/j.issn.1004-9649.202404055

Abstract

Abstract:

A new protection scheme for the collection line of photovoltaic power station based on comprehensive harmonic drive is proposed. Firstly, the harmonic sources and characteristics of the collection line fault in photovoltaic power station are analyzed, and the current harmonics are obtained by fiber optical current transformer (FOCT), and the harmonic characteristic weight is calculated based on the nondominated sorting genetic algorithm Ⅱ (NSGA-Ⅱ) to improve the comprehensive harmonic characteristic of fault current. At the time, the high-order harmonic start-up criterion and the comprehensive harmonic action criterion are constructed. The simulation study is carried out for different fault conditions, and the effectiveness of proposed method is verified.

Key words: photovoltaic power station, collector line, transient characteristics, harmonic protection

Jiandong WO, Wulue PAN, Yuehui LI, Jiayi WU. New Solution for Photovoltaic Station Collector Line Protection Based on Comprehensive Harmonic Drive[J]. Electric Power, 2025, 58(2): 133-139.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202404055

https://www.electricpower.com.cn/EN/Y2025/V58/I2/133

Figures/Tables 11

References 18

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故障类型	故障发生/s	保护启动/s	保护动作/s
ABC	0.5000	0.5020	0.5036
AB	0.5000	0.5018	0.5150
AB-G	0.5000	0.5023	0.5150
AC	0.5000	0.5012	0.5110
AC-G	0.5000	0.5018	0.5150

故障类型	故障发生/s	保护启动/s	保护动作/s
ABC	0.5000	0.5020	0.5036
AB	0.5000	0.5018	0.5150
AB-G	0.5000	0.5023	0.5150
AC	0.5000	0.5012	0.5110
AC-G	0.5000	0.5018	0.5150

故障合闸角/(°)	故障发生/s	保护启动/s	保护动作/s
0	0.5010	0.5037	0.5100
30	0.5027	0.5042	0.5145
60	0.5043	0.5055	0.5160
90	0.5060	0.5075	0.5210

故障合闸角/(°)	故障发生/s	保护启动/s	保护动作/s
0	0.5010	0.5037	0.5100
30	0.5027	0.5042	0.5145
60	0.5043	0.5055	0.5160
90	0.5060	0.5075	0.5210

故障位置	故障发生/s	保护启动/s	保护动作/s
F1	0.5000	0.5018	0.5065
F2	0.5000	0.5018	0.5073
F3	0.5000	0.5018	0.5075
F4	0.5000	0.5018	0.5075
F5	0.5000	0.5018	0.5078