新能源低电压穿越无功电流对暂态电压安全约束的影响

doi:10.11930/j.issn.1004-9649.202111041

中国电力 ›› 2022, Vol. 55 ›› Issue (2): 152-158.DOI: 10.11930/j.issn.1004-9649.202111041

新能源低电压穿越无功电流对暂态电压安全约束的影响

刘辉¹, 王阔²

1. 国网冀北电力有限公司电力科学研究院，北京 100045;
2. 北京大学，北京 100191

收稿日期:2021-11-09 修回日期:2022-01-22 出版日期:2022-02-28 发布日期:2022-02-23
作者简介:刘辉（1975—），男，博士，高级工程师（教授级），从事新能源电力系统安全稳定运行与控制研究，E-mail：liuhtj@163.com;王阔（2000—），男，学士，从事能源及大数据应用研究，E-mail：wangkuo2019@pku.edu.cn
基金资助:
国家电网有限公司科技项目（52018K21N00H）

LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage

LIU Hui¹, WANG Kuo²

1. State Grid Jibei Electric Power Research Institute, Beijing 100045, China;
2. Peking University, Beijing 100191, China

Received:2021-11-09 Revised:2022-01-22 Online:2022-02-28 Published:2022-02-23
Supported by:
This work is supported by Science and Technology Project of SGCC (No.52018K21N00H).

摘要/Abstract

摘要： 新能源汇集系统常呈现弱电网特征，在故障过程中电压波动较大，新能源机组由于低电压和暂态过电压脱网的问题凸显。首先建立新能源汇集系统中新能源机端的电压电流关系，考虑低电压和暂态过电压安全约束，通过理论推导，给出新能源在低/高电压过程中输出无功电流应满足的约束条件。然后将新能源汇集系统按照短路比分类，针对不同短路比（short circuit ratio, SCR）的系统，给出了差异化的新能源低/高电压过程无功电流响应指标要求。

关键词: 新能源汇集系统, 低电压穿越, 暂态过电压, 短路比

Abstract: The renewable power gathering system often presents the characteristics of a weak AC grid. And the voltage fluctuates greatly during the failure process. The problem of renewable units being turned-off due to low voltage and transient overvoltage is prominent. This paper establishes the voltage-current relationship of the renewable power gathering system. Considering the safety constraints of low voltage and transient overvoltage, we gives the LVRT reactive current index requirements for the renewable units through theoretical derivation. Then, the renewable power gathering system is classified according to the short circuit ratio (SCR), and for systems with different SCRs, differentiated LVRT reactive current index requirements are given.

Key words: renewable power gathering system, low voltage ride through, transient overvoltage, short-circuit ratio

刘辉, 王阔. 新能源低电压穿越无功电流对暂态电压安全约束的影响[J]. 中国电力, 2022, 55(2): 152-158.

LIU Hui, WANG Kuo. LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage[J]. Electric Power, 2022, 55(2): 152-158.

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新能源低电压穿越无功电流对暂态电压安全约束的影响

LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage

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新能源低电压穿越无功电流对暂态电压安全约束的影响

LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage

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