一种抑制后续换相失败的变斜率电流偏差控制方法

doi:10.12204/j.issn.1000-7229.2023.01.009

电力建设 ›› 2023, Vol. 44 ›› Issue (1): 73-81.doi: 10.12204/j.issn.1000-7229.2023.01.009

一种抑制后续换相失败的变斜率电流偏差控制方法

晁武杰¹^,³(), 邓超平¹^,³(), 黄均纬¹^,³(), 李元琦²(), 王渝红²(), 陈立维²()

1.国网福建省电力有限公司电力科学研究院,福州市 350007
2.四川大学电气工程学院,成都市 610065
3.福建省智能电网保护与运行控制重点实验室,福州市 350007

收稿日期:2022-03-23 出版日期:2023-01-01 发布日期:2022-12-26
通讯作者: 李元琦 E-mail:zlwng2016@163.com;619524260@qq.com;21810021@zju.edu.cn;948373739@qq.com;yuhongwang@scu.edu.cn;1184486695@qq.com
作者简介:晁武杰(1983),男,博士,高级工程师,主要研究方向为柔性直流输电技术、电力系统继电保护技术,E-mail:zlwng2016@163.com
邓超平(1971),男,博士,高级工程师,主要研究方向为直流输电技术,E-mail:619524260@qq.com。
黄均纬(1996),男,硕士,工程师,主要研究方向为直流输电技术,E-mail:21810021@zju.edu.cn。
王渝红(1971),女,博士,教授,博士生导师,主要研究方向为高压直流输电、电力系统稳定与控制、新能源并网等,E-mail:yuhongwang@scu.edu.cn。
陈立维(1996),男,硕士研究生,主要研究方向为高压直流输电,E-mail: 1184486695@qq.com。
基金资助:
国家电网公司科技项目“闽粤背靠背直流输电工程协同控制与调试技术研究”(52130420001S)

A Variable-Slope Current Deviation Control Method to Suppress Subsequent Commutation Failure

CHAO Wujie¹^,³(), DENG Chaoping¹^,³(), HUANG Junwei¹^,³(), LI Yuanqi²(), WANG Yuhong²(), CHEN Liwei²()

1. Fujian Power Co.,Ltd.Electric Power Research Institute,Fuzhou 350007,China
2. College of Electrical Engineering, Sichuan University, Chengdu 610065, China
3. Fujian Key Laboratory of Smart Grid Protection and Operation Control,Fuzhou 350007,China

Received:2022-03-23 Online:2023-01-01 Published:2022-12-26
Contact: LI Yuanqi E-mail:zlwng2016@163.com;619524260@qq.com;21810021@zju.edu.cn;948373739@qq.com;yuhongwang@scu.edu.cn;1184486695@qq.com

摘要/Abstract

摘要：

为降低高压直流输电系统发生后续换相失败的风险,分析了换相失败机理,并结合对称与不对称故障检测器提出了一种可根据故障严重程度调整电流偏差控制(current error control,CEC)的改进方案。分析了电流偏差控制的斜率大小对换相失败的抑制效果,发现电流偏差控制中斜坡函数的斜率越大则对输入电流偏差越敏感且换相裕度增量越大,越有利于抑制后续换相失败。最后,在PSCAD/EMTDC 仿真软件中基于 CIGRE HVDC标准测试系统实现了所提控制方案。仿真结果表明,所提的电流偏差控制方法能有效降低高压直流输电系统发生后续换相失败的风险,提高直流输电系统的运行特性。

关键词: 高压直流输电, 后续换相失败, 电流偏差控制, 换相裕度

Abstract:

In order to reduce the risk of subsequent commutation failure in HVDC transmission system, the commutation failure mechanism is analyzed, and combined with symmetrical and asymmetric fault detectors, an improved scheme of current deviation control which can be adjusted according to the severity of fault is proposed. The suppression effect of the slope of current deviation control on commutation failure is analyzed. It is found that the larger the slope of slope function in current deviation control is, the more sensitive it is to input current deviation, and the larger the commutation margin increment is, the more conducive it is to suppress subsequent commutation failure. Finally, the proposed control scheme is realized on the basis of CIGRE HVDC Standard Test System in PSCAD / EMTDC simulation software. The simulation results show that the current deviation control method proposed in this paper can effectively reduce the risk of subsequent commutation failure of HVDC system and improve the operation characteristics of HVDC system.

This work is supported by State Grid Corporation of China Research Program (No.52130420001S).

Key words: high voltage DC transmission, subsequent commutation failure, current deviation control, commutation margin

中图分类号:

TM72

晁武杰, 邓超平, 黄均纬, 李元琦, 王渝红, 陈立维. 一种抑制后续换相失败的变斜率电流偏差控制方法[J]. 电力建设, 2023, 44(1): 73-81.

CHAO Wujie, DENG Chaoping, HUANG Junwei, LI Yuanqi, WANG Yuhong, CHEN Liwei. A Variable-Slope Current Deviation Control Method to Suppress Subsequent Commutation Failure[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(1): 73-81.

图/表 10

图1 CIGRE HVDC标准测试系统控制结构

Fig.1 Control structure of CIGRE HVDC standard test system

图2 全套控制系统的静态伏安特性

Fig.2 Static volt-ampere characteristics of the complete control system

图3 电流偏差控制静态特性曲线

Fig.3 Static characteristic curve of current deviation control

图4 变斜率电流偏差控制结构

Fig.4 Structure diagram of variable-slope current deviation control

图5 方式一CEC特性曲线

Fig.5 CEC characteristic curve of Scheme 1

图6 方式二CEC特性曲线

Fig.6 CEC characteristic curve of Scheme 2

图7 方式三CEC特性曲线

Fig.7 CEC characteristic curve of Scheme 3

图8 三相故障Lf=0.6 H时系统的运行特性

Fig.8 System operation performance under three-phase fault with Lf= 0.6 H

图9 单相故障Lf=0.4 H时系统的运行特性

Fig.9 System operation performance under single-phase fault with Lf= 0.4 H

表1 五种控制方案下直流系统连续换相失败次数

Table 1 Number of continuous commutation failures in HVDC under four control methods

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一种抑制后续换相失败的变斜率电流偏差控制方法

A Variable-Slope Current Deviation Control Method to Suppress Subsequent Commutation Failure

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