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| 引用本文: | 曹 虹,夏 秋,俞 斌,等.特高压直流近区交流输电线路智能重合闸策略[J].电力系统保护与控制,2022,50(3):156-163.[点击复制] |
| CAO Hong,XIA Qiu,YU Bin WANG,et al.Intelligent reclosing strategy for near area AC transmission lines connected with UHVDC[J].Power System Protection and Control,2022,50(3):156-163[点击复制] |
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| 特高压直流近区交流输电线路智能重合闸策略 |
| 曹虹,夏秋,俞斌,王同文,邵庆祝,王兴国 |
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| (1.中国电力科学研究院有限公司, 北京 100192;2.国网安徽省电力有限公司，安徽 合肥 230061) |
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| 摘要: |
| 提出了一种特高压直流近区交流输电线路智能重合闸策略，避免重合于永久性故障带来的二次冲击，从而避免直流连续换相失败和直流闭锁事故，提高特高压交直流混联系统的安全稳定性。分析了现有基于电压特征的永久性故障判别算法的不足，提出了基于故障测距结果的双参数故障判别算法。而后在计算交流侧安全裕度指标和直流侧安全裕度指标的基础上，建立重合闸投切与系统安全关联度指标以预判系统安全性。结合预判结果综合判别永久性故障和瞬时性故障，构建智能重合闸策略。RTDS仿真结果验证了智能重合闸策略的有效性和可行性。智能重合闸策略为特高压直流近区交流输电线路重合闸提供了新的思路。 |
| 关键词: 特高压直流近区 智能重合闸 安全裕度指标 永久性故障 瞬时性故障 |
| DOI：DOI: 10.19783/j.cnki.pspc.210326 |
| 投稿时间：2021-03-26修订日期：2021-08-24 |
| 基金项目:国家电网有限公司科技项目资助“特高压交直流近区输电线路高阻故障快速识别及智能重合闸技术研究”(SGAH0000TKJS1900055) |
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| Intelligent reclosing strategy for near area AC transmission lines connected with UHVDC |
| CAO Hong,XIA Qiu,YU Bin WANG,Tongwen,SHAO Qingzhu,WANG Xingguo |
| (1. China Electric Power Research Institute Co., Ltd., Beijing 100192, China;
2. State Grid Anhui Electric Power Co., Ltd., Hefei 230061, China) |
| Abstract: |
| An intelligent reclosing strategy for the near area AC side of the UHV AC/DC hybrid system is proposed. It avoids secondary impact caused by reclosing in permanent fault which leads to DC blocking accident caused by DC continuous commutation failure, and improves the safety and stability of UHV AC/DC hybrid system. This paper analyzes the shortcomings of the existing permanent fault discrimination algorithm based on voltage characteristics, and puts forward a two-parameter fault discrimination algorithm based on fault location results. Then, based on the calculation of AC side safety margin index and DC side safety margin index, the correlation index between reclosing switching and system safety is established to predict system safety. Combined with the prediction results, the permanent fault and transient fault are comprehensively distinguished, and the intelligent reclosing cooperation strategy is constructed. RTDS simulation results verify the effectiveness and feasibility of intelligent reclosing strategy. Intelligent reclosing strategy provides a new idea for reclosing of UHVDC near area AC transmission line.
This work is supported by the Science and Technology Project of State Grid Corporation of China (No. SGAH0000TKJS1900055). |
| Key words: UHVDC near area intelligent reclosing safety margin index permanent failure transient fault |
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