| 引用本文: | 印月,刘天琪,艾青,李保宏,江琴.预防多馈入直流输电系统换相失败的直流功率控制方法[J].电力自动化设备,2019,39(11): |
| YIN Yue,LIU Tianqi,AI Qing,LI Baohong,JIANG Qin.DC power control method for preventing commutation failure in multi-DC transmission system[J].Electric Power Automation Equipment,2019,39(11): |
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| 摘要: |
| 为了预防多馈入直流输电系统换相失败及同时换相失败的问题，提出了一种直流功率控制方法。在定量分析直流功率对逆变侧换流母线电压影响的基础上，利用回降故障直流功率、增大系统电压稳定裕度的方法防止换相失败。该方法根据逆变器之间的相互作用关系，将多馈入直流输电系统换相失败分为2种不同场景，针对不同场景设计了相应的直流功率控制策略，并给出了对应的直流功率控制启动判据，计算了直流功率调节量及其调节速率。在PSCAD仿真平台搭建多馈入直流输电系统模型，所提出的直流功率控制方法能够有效避免多馈入直流输电系统换相失败及同时换相失败。 |
| 关键词: 高压直流输电 换相失败 同时换相失败 直流功率控制 交互作用因子 |
| DOI：10.16081/j.epae.201910010 |
| 分类号:TM721.1 |
| 基金项目:国家电网公司科技项目(SGNXDKOOBGJS160021) |
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| DC power control method for preventing commutation failure in multi-DC transmission system |
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YIN Yue, LIU Tianqi, AI Qing, LI Baohong, JIANG Qin
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College of Electrical Engineering, Sichuan University, Chengdu 610065, China
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| Abstract: |
| In order to prevent commutation failure and concurrent commutation failure in multi-DC transmission system, DC power control method is proposed. Based on the quantitative analysis of the impact of DC power on the bus voltage of inverter side converter, the commutation failure is prevented by reducing the DC power of the fault and increasing the voltage stability margin of system. According to the interaction between the inverters, this method divides the commutation failure of multi-DC transmission system into two different scenarios. The corresponding DC power control strategies are designed for different scenarios, and the starting criterion of DC power control, DC power regulation quantity and rate are given. A multi-infeed DC power transmission system model is built on the PSCAD simulation platform. The proposed DC power control method can effectively prevent commutation failure and concurrent commutation failure in multi-DC transmission system. |
| Key words: HVDC power transmission commutation failure concurrent commutation failure direct current power control interaction factor |
