基于频率差的风电配电网线路保护新方法  

New Method for Line Protection of Wind Power Distribution Network Based on Frequency Difference

作　　者：林全 LIN Quan(Luzhou Yuyu Electric Power Co.,Ltd.,Luzhou,Sichuan 646200,China)

机构地区：[1]泸州玉宇电力有限责任公司,四川泸州646200

出　　处：《自动化应用》2024年第9期81-83,共3页Automation Application

摘　　要：风力是自然界清洁可再生能源,利用风力发电能够有效解决煤炭等化石能源发电污染的问题。但由于风速波动等原因,风力发电具有随机性、突发性、不确定性的特点,这影响了配电网中三段式保护动作的可靠性。对此,提出了一种基于线路两端电流频率差的方法以确保线路保护可靠动作,并在PSCAD仿真软件中建立模型分析验证了该方法的有效性和可行性。结果表明,在不同风速线路故障及不同线路故障类型下,该保护方法均能够有效可靠动作,并且可以根据保护动作情况判别故障大致发生位置,具有较强的适应性。Wind power is a clean and renewable energy in nature.The use of wind power can effectively solve the problem of coal and other fossil energy power generation pollution.However,due to wind speed fluctuations and other reasons,wind power generation has the characteristics of randomness,suddenness and uncertainty,which affects the reliability of threestage protection action in distribution network.To this end,this paper proposes a method based on the current frequency difference at both ends of the line to ensure reliable operation of line protection,and establishes a model in PSCAD simulation software to analyze and verify the effectiveness and feasibility of the method.Results show that the protection method can operate effectively and reliably under different wind speed line faults and different types of line faults.And the fault location can be identified according to the protection action situation,with strong adaptability.

关 键 词：风电 配电网 线路保护 

分 类 号：TM773[电气工程—电力系统及自动化]