| 引用本文: | 赵 东,何 山,韩 璐,等.离网型制氢系统典型短路故障分析及协同保护[J].电力系统保护与控制,2024,52(21):60-70. |
| ZHAO Dong,HE Shan,HAN Lu,et al.Typical short-circuit fault analysis and cooperative protection of an off-grid hydrogen production system[J].Power System Protection and Control,2024,52(21):60-70 |
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| 摘要: |
| 离网型新能源发电制氢系统输电线路很可能因故障而造成系统崩溃，故障的快速检测与切除是保证其正常运行的关键。为实现离网型制氢系统线路全范围故障检测，同时实现后备保护与主保护的协调配合，提出一种以故障瞬时功率差分变化率为主保护、本地功率变化率构成后备保护的协同保护方法。首先，确立离网型制氢系统拓扑结构，建立离网制氢电网模型。其次，利用回路分析法推导短路故障电流、电压，计算故障瞬时功率差分变化率。最后，分析不同故障类型下正负极瞬时功率差分变化率特征。当系统通信正常时，利用其故障瞬时功率差分变化率与阈值进行比较以启动主保护，再利用故障后功率差分变化率构造选极坐标系，实现故障选极。当通信故障时，后备保护快速切除故障，避免故障范围进一步扩大。该协同保护方法具有良好的速动性、选择性和可靠性，且能应对通信故障的情况。 |
| 关键词: 离网制氢 故障检测 协同保护 通信故障 |
| DOI：10.19783/j.cnki.pspc.240057 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(52266018)；新疆维吾尔自治区重点研发计划项目资助(2022B01003-3)；新疆维吾尔自治区重点实验室开放课题资助(2023D04029)；国家科技部第三次新疆综合科学考察课题资助(2021xjkk1102) |
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| Typical short-circuit fault analysis and cooperative protection of an off-grid hydrogen production system |
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ZHAO Dong1, HE Shan1, 2, HAN Lu1, YUAN Zhi1, XU Lijun3, FAN Xiaochao3
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1. Renewable Energy Power Generation and Grid-connected Technology in the Autonomous Region, Xinjiang University,
Urumqi 830017, China; 2. Engineering Research Center of Renewable Energy Power Generation and
Grid-connected Control, Ministry of Education, Xinjiang University, Urumqi 830017, China;
3. Xinjiang Institute of Engineering, Urumqi 830023, China
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| Abstract: |
| The transmission line of off-grid new energy generation hydrogen production systems is likely to cause system collapse due to faults, and the rapid detection and removal of faults is key to ensuring normal operation. To realize the full-range fault detection of off-grid hydrogen production system lines, and at the same time realize the coordination between the backup protection and the main protection, a cooperative protection method based on the fault instantaneous power differential rate of change as the main protection and the local power rate of change constituting the backup protection is proposed. First, the topology of off-grid hydrogen production system is established, and the hydrogen production grid is modeled. Secondly, the short-circuit fault currents and voltages are derived using loop analysis, and the instantaneous power differential rate of change of the fault is calculated. Finally, the positive and negative instantaneous power differential rate of change characteristics are analyzed with different types of faults. When the system communication is normal, the main protection is activated by comparing its fault instantaneous power differential rate of change with the threshold value, and then the post-fault power differential rate of change is used to construct the pole selection coordinate system to realize the fault pole selection. In the case of communication failure, the backup protection quickly removes the fault to avoid further expansion of the fault scope. This synergistic protection method has good speed, selectivity, reliability, and can cope with communication failure. |
| Key words: off-grid hydrogen production fault detection synergistic protection communications failure |
