Research on Optimization of Operation Mode in Jinguan-Guizhong HVDC Sending-end System

被引：0
|
作者：
Huang Z. [1 ]
Mei Y. [2 ]
Zhu L. [1 ]
Xie H. [2 ]
机构：
[1] School of Electric Power, South China University of Technology, Guangzhou
[2] Power Dispatching and Control Center of China Southern Power Grid, Guangzhou
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 01期
关键词：
AC overvoltage; Active blocking strategy; Dry season operation mode; Island operation; Jinguan-Guizhong HVDC; Low-order resonance;
D O I：
10.13336/j.1003-6520.hve.20190321014
中图分类号：
学科分类号：
摘要：
The power supply for Jinguan-Guizhong HVDC sending-end system is provided by two run-off-river hydropower plants. In the dry season, due to insufficient water, power can not meet the requirements of short-circuit capacity for HVDC safe operation. The long-term low-load operation of power plants leads to serious safety hazards in the power plant and plant infrastructure, threatening the safe operation of the power plant and HVDC. According to the design requirements and simulation, we analyzed the effects of short-circuit capacity shortage on the system stability, AC over-voltage, and low-order resonance characteristics, and optimized the safe operating boundary conditions and HVDC transmission power setting of Jinguan-Guizhong HVDC. In order to ensure the stable operation of the system after the HVDC project jumped into island operation, we proposed a technical scheme of active blocking strategy as follows: to first cut off all the AC filters in the converter station, and then block the bipolar HVDC emergency. The optimization scheme reduces the start-up requirements of DC system power plants. The minimum total number of power plants has been reduced from 4 to 2. The power of HVDC is set to 600 MW in dry season. Therefore, not only the requirements of safe and stable operation mode of Jinguan-Guizhong HVDC in interconnection and island can be met, but also the flexibility of operation mode arrangement of HVDC and sending-end system power plants can be enhanced. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：161 / 169
页数：8
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