| 引用本文: | 赵静波,钟文梁,安海云,等.光伏接入下高压直流输电系统后续换相失败抑制策略研究[J].电力系统保护与控制,2025,53(9):38-48.[点击复制] |
| ZHAO Jingbo,ZHONG Wenliang,AN Haiyun,et al.Study on suppression strategy for subsequent commutation failure in HVDC transmission systems with photovoltaic integration[J].Power System Protection and Control,2025,53(9):38-48[点击复制] |
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| 摘要: |
| 大量新能源发电系统接入高压直流输电系统受端电网势在必行，然而鲜有研究涉及该场景下的高压直流后续换相失败抑制。首先，针对光伏接入电网换相换流器型高压直流输电系统受端交流电网的场景，分析了交流故障后光伏诱发电网换相换流器型高压直流输电系统后续换相失败的相关机理，发现电网换相换流器型高压直流输电系统在首次换相失败恢复后易因光伏出力波动而出现超前触发角指令波动的问题。在此基础上，提出了一种基于逆变侧控制指令波动平抑的后续换相失败抑制策略，该策略在定电流、定关断角控制的基础上引入附加电流、关断角偏差，可缓解超前触发角指令波动。最后，结合PSCAD/EMTDC仿真软件在不同光伏装机容量、接入距离、故障位置下验证了所提抑制策略的有效性。 |
| 关键词: 高压直流输电系统 后续换相失败 新能源 抑制策略 |
| DOI：10.19783/j.cnki.pspc.240992 |
| 投稿时间：2024-07-28修订日期：2025-02-17 |
| 基金项目:国家自然科学基金面上项目资助(52477127)；江苏省自然科学基金项目资助(BK20221197) |
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| Study on suppression strategy for subsequent commutation failure in HVDC transmission systems with photovoltaic integration |
| ZHAO Jingbo1,ZHONG Wenliang2,AN Haiyun1,LIU Jian2,LIN Sheng2 |
| (1. Jiangsu Electric Power Research Institute Corporation Limited, Nanjing 211103, China; 2. School of Electrical
Engineering, Southwest Jiaotong University, Chengdu 611756, China) |
| Abstract: |
| It has become a trend that large scale renewable energy power generation systems are connected to the receiving end grid of HVDC transmission systems. However, there is limited research on suppressing subsequent commutation failure in HVDC systems under such scenarios. First, in view of the scenario of PV connecting to the receiving end of LCC AC grid, the relevant mechanisms of subsequent commutation failure induced by PV after an AC fault are analyzed. It is found that after the initial commutation failure recovery, LCC experiences oscillations in the firing angle command due to PV output fluctuations. To address this, a subsequent commutation failure suppression strategy based on the suppression of inverter control command oscillations is proposed. By introducing additional current and extinction angle deviations into the constant current control and constant extinction angle control, the proposed method alleviates oscillations in the firing angle command. Finally, PSCAD/EMTDC simulations under different PV installation capacities, connection distances, and fault locations validate the effectiveness of the proposed suppression strategy. |
| Key words: HVDC subsequent commutation failure renewable energy suppression strategy |
