| 计及分布式光伏发电低电压穿越能力的主动配电网保护方法 |
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| 引用本文： | 孙玲玲,王宁,贾清泉,张弓.计及分布式光伏发电低电压穿越能力的主动配电网保护方法[J].电力自动化设备,2018,38(6). |
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| 作者姓名： | 孙玲玲 王宁 贾清泉 张弓 |
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| 作者单位： | 燕山大学电气工程学院;国网冀北电力有限公司秦皇岛供电公司 |
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| 基金项目： | 国家自然科学基金资助项目(51607153) |
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| 摘 要： | 针对高渗透率分布式光伏发电并网造成主动配电网原有保护无法适应的问题,提出计及分布式光伏发电低电压穿越能力的主动配电网保护方法。根据分布式光伏发电低电压穿越控制策略对其故障特性的影响,定性分析了光伏发电故障电流与并网点电压的相位关系,推导主动配电网各馈线电流正序故障分量特征,结合电压信息,提出基于母线故障前电压正序分量与各馈线正序电流故障分量相位比较的保护方法。最后利用PSCAD建立主动配电网系统模型,对所提方法进行仿真算例分析,结果表明该方法正确、有效。
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| 关 键 词： | 光伏电源 主动配电网 低电压穿越 继电保护 正序电流故障分量 相位比较 |
Protection method of active distribution network considering low voltage ride through of distributed PV generation |
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| SUN Lingling,WANG Ning,JIA Qingquan and ZHANG Gong.Protection method of active distribution network considering low voltage ride through of distributed PV generation[J].Electric Power Automation Equipment,2018,38(6). |
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| Authors: | SUN Lingling WANG Ning JIA Qingquan and ZHANG Gong |
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| Affiliation: | College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China,College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China,College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China and Qinhuangdao Power Supply Company, State Grid Jibei Electric Power Company Limited, Qinhuangdao 066000, China |
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| Abstract: | Aiming at the protection failure issues caused by distributed PV(PhotoVoltaic) generation with high permeability connecting to AND(Active Distribution Network),an ADN protection scheme considering PV low voltage ride-through capacity is proposed. According to the influence of PV low voltage ride-through control strategy on fault characteristics, the phase relationship between PV fault current and voltage of PCC(Point of Common Coupling) is qualitatively analyzed, and the positive-sequence fault component characteristics of feeders are deduced. Combined with the voltage information, a protection scheme based on phase comparison between pre-fault positive-sequence bus voltage and fault components of positive-sequence currents of feeders is proposed. An ADN simulation model is established by PSCAD to verify the correctness and effectiveness of the proposed protection scheme. |
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| Keywords: | photovoltaic generator active distribution network low voltage ride-through relay protection positive-sequence current fault components phase comparison |
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