| 引用本文: | 王同文,徐靖东,邵庆祝,等.光伏发电系统非计划孤岛问题的研究[J].电力系统保护与控制,2020,48(5):173-180.[点击复制] |
| WANG Tongwen,XU Jingdong,SHAO Qingzhu,et al.Research on non-scheduled islanding supplied by photovoltaic power generations[J].Power System Protection and Control,2020,48(5):173-180[点击复制] |
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| 摘要: |
| 被动式反孤岛保护在现场应用广泛，但存在较大的动作死区，无法完全区分孤岛效应与暂态电压跌落，因此反孤岛保护无法与光伏的低电压穿越控制形成有效的配合。针对一起配电网孤岛案例，分析了孤岛产生的机理，对基于电压和频率检测的被动式反孤岛保护的适用性进行了评估。通过建立基于PSCAD的光伏孤岛仿真模型，分析了从故障发生到孤岛产生的过程中电压和频率的暂态特性，揭示了现场保护动作特性与孤岛效应的关系，给出了基于传统配电网的保护应对建议。 |
| 关键词: 分布式光伏 反孤岛保护 暂态特征 保护适应性 |
| DOI：10.19783/j.cnki.pspc.190433 |
| 投稿时间：2019-04-18修订日期：2019-06-13 |
| 基金项目:国家重点研发计划资助(2017YFB0902900);国网安徽省电力有限公司科技项目资助(52120017001G) |
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| Research on non-scheduled islanding supplied by photovoltaic power generations |
| WANG Tongwen,XU Jingdong,SHAO Qingzhu,XIE Min,YU Bin,LI Xuedong,YANG Chang |
| (State Grid Anhui Electric Power Co., Ltd., Hefei 230061, China;State Key Laboratory of Electrical Insulation for Power Equipment Xi’an Jiaotong University, Xi’an 710049, China;Beijing Join Bright Digital Power Technology CO., LTD., Beijing 100085, China;School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China) |
| Abstract: |
| Passive anti-islanding protections have been widely used in field, but all of them have dead zone of protection operation. On this account, islanding effect cannot completely be distinguished from transient voltage sags. Therefore, the anti-islanding protection cannot effectively cooperate with the low voltage traversing control of photovoltaics. In this paper, the mechanism of islanding is analyzed, and the applicability of passive anti-islanding protections based on voltage and frequency detection is evaluated. The transient characteristics of voltage and frequency during the process from fault to islanding are analyzed by establishing a PSCAD-based photovoltaic islanding simulation model. The relationship between the operation characteristics of field protection and islanding effect is revealed, and the protection countermeasures based on traditional distribution network are proposed. This work is supported by National Key Research and Development Program of China (No. 2017YFB0902900) and Science and Technology Project of State Grid Anhui Electric Power Co., Ltd. (No. 52120017001G). |
| Key words: distributed photovoltaic power generation anti-islanding protection transient characteristics adaption of relay protection |
