| 引用本文: | 江叶峰,鲍颜红,张金龙,等.应对直流连续换相失败的动态无功备用评估[J].电力系统保护与控制,2021,49(19):173-180.[点击复制] |
| JIANG Yefeng,BAO Yanhong,ZHANG Jinlong,et al.Dynamic reactive power reserve evaluation for DC continuous commutation failure[J].Power System Protection and Control,2021,49(19):173-180[点击复制] |
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| 摘要: |
| 实时评估基于晶闸管的相控换流式直流输电系统(LCC-HVDC)连续换相失败风险，及时采取预防控制措施对保障大电网安全稳定运行意义重大。提出一种应对直流连续换相失败的发电机有效动态无功备用评估方法。将对应于换流母线电压二次跌落的发电机最大无功出力增量定义为有效动态无功备用，临界点处的有效动态无功备用称之为最大有效动态无功备用。当系统动态无功备用小于备用容量门槛值时，采取两阶段的预防控制措施搜索方法。首先采用提升发电机机端电压和增加静态无功补偿的方式，如仍然不能满足要求，在此基础上增加开机。某实际电网的算例验证了该方法的有效性。 |
| 关键词: 高压直流 连续换相失败 动态无功 备用评估 预防控制 |
| DOI：DOI: 10.19783/j.cnki.pspc.201635 |
| 投稿时间：2020-12-29修订日期：2021-03-12 |
| 基金项目:国家电网公司总部科技项目资助(5100- 201940013A-0-0-00) |
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| Dynamic reactive power reserve evaluation for DC continuous commutation failure |
| JIANG Yefeng1,BAO Yanhong2,ZHANG Jinlong2,CUI Zhanfei1,XU Wei2,REN Xiancheng2,CHEN Yingjie2 |
| (1. Dispatch and Communication Center of Jiangsu Electric Power Company Ltd., Nanjing 210024, China;
2. NARI Group Corporation (State Grid Electric Power Research Institute Co., Ltd.,), Nanjing 211106, China) |
| Abstract: |
| Real-time assessment of the risk of continuous commutation failure of a thyristor-based Line-Commuted Converter High Voltage Direct Current System (LCC-HVDC) and timely preventive control measures are of great significance in ensuring safe and stable operation of a large power grid. This paper proposes a method for evaluating effective dynamic reactive power reserve of generators to deal with DC continuous commutation failure. The maximum reactive power increment of the generator corresponding to the secondary drop of the converter bus voltage is defined as the effective dynamic reactive power reserve, at the critical point this is called the maximum effective dynamic reactive power reserve. When the system dynamic reactive power reserve is less than the reserve capacity threshold, a two-stage preventive control measure search method is adopted. First, the method of increasing the generator terminal voltage and increasing the static reactive power compensation is adopted. If the requirements are still not met, the start-up units are increased. An example for an actual power grid verifies the effectiveness of the method.
This work is supported by the Science and Technology Project of the Headquarters of the State Grid Corporation of China (No. 5100-201940013A-0-0-00). |
| Key words: HVDC continuous commutation failure dynamic reactive power reserve evaluation preventive control |
