基于电流极性分布的光伏直流送出线快速保护方法

马健; 刘源; 张鑫宇; 南东亮; 董雪涛; 赵启

doi:10.19912/j.0254-0096.tynxb.2021-1495

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (4) : 439-447. DOI: 10.19912/j.0254-0096.tynxb.2021-1495

基于电流极性分布的光伏直流送出线快速保护方法

马健^1,2, 刘源^3,4, 张鑫宇^1,4, 南东亮¹, 董雪涛¹, 赵启¹

作者信息 +

PHOTOVOLTAIC DC TRANSMISSION LINE FAST PROTECTION METHOD BASED ON CURRENT POLARITY DISTRIBUTION

Ma Jian^1,2, Liu Yuan^3,4, Zhang Xinyu^1,4, Nan Dongliang¹, Dong Xuetao¹, Zhao Qi¹

Author information +

文章历史 +

摘要

为保障大型光伏电站通过直流升压汇集接入系统的方式安全稳定运行,保护装置需对直流送出线的极间短路故障准确判别。通过分析光伏直流送出线的故障特征,提出一种基于线路两端故障电流极性变化特点的快速保护方法。该方法利用二维映射原理,将线路两端换流器闭锁前的极性特征分布在二维坐标系中,并以概率描述的形式构造保护判据,从而避免极间短路故障存在极性穿越过程时依据瞬时值引起的误判。通过PSIM仿真平台搭建1 MW/±30 kV光伏直流升压外送仿真模型进行验证,结果表明,该方法可快速准确判别故障区段,且具有耐受较高过渡电阻、分布电容、噪声干扰及通信时延的能力。

Abstract

In order to ensure the safe and stable operation of large-scale photovoltaic power stations through DC boost convergence access system, the protection device needs to accurately distinguish the short-circuit fault between the DC transmission lines. By analyzing the fault characteristics of the photovoltaic DC transmission line, a fast protection scheme based on the characteristics of the polarity change of the fault current at both ends of the line is proposed. The method uses the principle of two-dimensional mapping to distribute the polarity characteristics of the converters at both ends of the line before being blocked in the two-dimensional coordinate system, and construct the protection criterion in the form of probability description, so as to avoid the misjudgment caused by the instantaneous value when there is a polarity ride-through process in the short circuit fault between the poles. The 1 MW/±30 kV photovoltaic DC boost output simulation model is built through the PSIM simulation platform for verification. The results show that this method can quickly and accurately identify the fault section, and has the ability to withstand higher transition resistance, distributed capacitance, noise interference and communication delay.

导出引用

马健, 刘源, 张鑫宇, 南东亮, 董雪涛, 赵启. 基于电流极性分布的光伏直流送出线快速保护方法[J]. 太阳能学报. 2023, 44(4): 439-447 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1495

Ma Jian, Liu Yuan, Zhang Xinyu, Nan Dongliang, Dong Xuetao, Zhao Qi. PHOTOVOLTAIC DC TRANSMISSION LINE FAST PROTECTION METHOD BASED ON CURRENT POLARITY DISTRIBUTION[J]. Acta Energiae Solaris Sinica. 2023, 44(4): 439-447 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1495

中图分类号： TM773

参考文献

[1] 鞠昌斌, 王环, 孟姗姗, 等. 大功率、高变比光伏高压直流并网变换器[J]. 太阳能学报, 2018, 39(2): 572-582.
JU C B, WANG H, MENG S S, et al.High power and high ratio of PV high voltage DC grid connected converter[J]. Acta energiae solaris sinica, 2018, 39(2): 572-582.
[2] WANG Y B, JU C B, WANG H, et al.Design and control of DC-DC grid-connected converter for photovoltaic power[C]//31st European Photovoltaic Solar Energy Conference and Exhibition, INSPEC, Hamburg, Germany, 2015: 2353-2357.
[3] 刘源, 樊艳芳, 马健, 等. 基于电流相角分布的光伏直流送出线保护方案[J]. 科学技术与工程, 2021, 21(21): 8932-8938.
LIU Y, FAN Y F, MA J, et al.Photovoltaic direct current transmission line protection scheme based on current phase angle distribution[J]. Science technology and engineering, 2021, 21(21): 8932-8938.
[4] 戴志辉, 刘雪燕, 刘自强, 等. 基于电流故障分量的柔直配电线路纵联保护原理[J]. 高电压技术, 2021, 47(5): 1684-1695.
DAI Z H, LIU X Y, LIU Z Q, et al.Pilot protection scheme for flexible DC distribution grids based on superimposed current[J]. High voltage engineering, 2021, 47(5): 1684-1695.
[5] 吕家乐, 杨景刚, 陈庆, 等. 基于电流微分状态量的直流配电网分布式区域保护[J]. 电力系统自动化, 2020, 44(18): 139-146.
LYU J L, YANG J G, CHEN Q, et al.Distributed area protection for DC distribution network based on current differential state variable[J]. Automation of electric power systems, 2020, 44(18): 139-146.
[6] 时伯年, 李岩, 孙刚, 等. 基于全过程故障电流的多端柔直配电网直流故障保护策略[J]. 高电压技术, 2019, 45(10): 3076-3083.
SHI B N, LI Y, SUN G, et al.DC fault protection strategy for multi-terminal flexible DC distribution network based on full fault current information[J]. High voltage engineering, 2019, 45(10): 3076-3083.
[7] 王圣辉, 范春菊, 姜山. 基于暂态电压比原理的直流配电网故障保护方案[J]. 电力自动化设备, 2020, 40(7): 196-205.
WANG S H, FAN C J, JIANG S.Fault protection scheme for DC distribution network based on ratio of transient voltage principle[J]. Electric power automation equipment, 2020, 40(7): 196-205.
[8] 戴志辉, 刘雪燕, 刘自强, 等. 基于限流电抗电压积分值的环状柔性直流配电网保护方案[J]. 电力自动化设备, 2020, 40(12): 104-116.
DAI Z H, LIU X Y, LIU Z Q, et al.Protection scheme for ring flexible DC distribution grids based on integration of current-limiting reactance voltage[J]. Electric power automation equipment, 2020, 40(12): 104-116.
[9] JIA K, FENG T, ZHAO Q J, et al.High frequency transient sparse measurement-based fault location for complex DC distribution networks[J]. IEEE transactions on smart grid, 2020, 11(1): 312-322.
[10] 李斌, 何佳伟, 李晔, 等. 基于边界特性的多端柔性直流配电系统单端量保护方案[J]. 中国电机工程学报, 2016, 36(21): 5741-5749,6016.
LI B, HE J W, LI Y, et al.Single-ended protection scheme based on boundary characteristic for the multi-terminal VSC-based DC distribution system[J]. Proceedings of the CSEE, 2016, 36(21): 5741-5749,6016.
[11] 陈少宇, 黄文焘, 邰能灵, 等. 多端柔性直流配电网高频功率相关性纵联保护方法[J]. 电力系统自动化, 2020, 44(19): 150-159.
CHEN S Y, HUANG W T, TAI N L, et al.Pilot protection method for multi-terminal flexible DC distribution network based on correlation of high-frequency power[J]. Automation of electric power systems, 2020, 44(19): 150-159.
[12] 朱瑞, 贾科, 赵其娟, 等. 光伏直流并网系统控保协同故障区段辨识方法[J]. 电网技术, 2019, 43(8): 2825-2835.
ZHU R, JIA K, ZHAO Q J, et al.Fault section identification of flexible DC collection system based on collaborated control-protection method[J]. Power system technology, 2019, 43(8): 2825-2835.
[13] 马健, 樊艳芳, 王一波, 等. 适用于集中型光伏直流升压变换器的MPPT策略[J]. 太阳能学报, 2022, 43(5): 137-145.
MA J, FAN Y F, WANG Y B, et al.Maximum power point tracking strategy for centralized photovoltaic DC-DC converter[J]. Acta energiae solaris sinica, 2022, 43(5): 137-145.
[14] 李广林, 樊艳芳, 王一波, 等. IPOS型光伏直流升压外送系统控制策略研究[J]. 太阳能学报, 2021, 42(8): 166-176.
LI G L, FAN Y F, WANG Y B, et al.Research on control strategy of IPOS type photovoltaic DC boost delivery system[J]. Acta energiae solaris sinica, 2021, 42(8): 166-176.
[15] 张鑫宇, 樊艳芳, 马健, 等. 基于拟合电流斜率特性的柔性直流配电线路纵联保护方法[J]. 电力系统保护与控制, 2021, 49(18): 128-136.
ZHANG X Y, FAN Y F, MA J, et al.Pilot protection method for flexible DC distribution lines based on fitted current slope characteristics[J]. Power system protection and control, 2021, 49(18): 128-136.
[16] 李猛, 贾科, 张秋芳, 等. 基于全电流方向特征的柔性直流配电网纵联保护[J]. 电力系统自动化, 2019, 43(23): 116-122, 130.
LI M, JIA K, ZHANG Q F, et al.Directional pilot protection for flexible DC distribution network based on directional characteristics of instantaneous current[J]. Automation of electric power systems, 2019, 43(23): 116-122, 130.
[17] 李爱民, 徐敏, 蔡泽祥, 等. 小步长采样的新型直流输电线路行波保护[J]. 电网技术, 2015, 39(1): 90-96.
LI A M, XU M, CAI Z X, et al.A small sampling interval based new traveling wave protection scheme for HVDC transmission lines[J]. Power system technology, 2015, 39(1): 90-96.