风电无人值守变电所主变过负荷运行状态监测研究

Research on monitoring of overload operation state of main transformer in unattended substation of wind power

由于当前监测方法不能实现主变过负荷特征量的精准提取,导致监测结果不理想以及低运行能耗偏高,为此提出风电无人值守变电所主变过负荷运行状态监测系统设计方法。系统硬件由电能计量模块、数据处理模块、监控终端模块构成,在此基础上设计系统软件,即通过阻性、容性以及感性对风电无人值守变电所负荷进行分类,通过Matlab小波分析对主变过负荷进行精准定位,以此提取负荷状态特征量。采用综合模糊评判对不同负荷特征量进行综合考量,设定不同参数的权重比获取量化的变电所主变过负荷运行状态监测结果。仿真实验结果表明,所提方法能够有效减少低运行能耗,获取更准确的监测结果,实际应用效果更好。

Because the current monitoring method can not accurately extract the overload characteristics of the main transformer,the monitoring results are not ideal and the low operation energy consumption is high.Therefore,the design method of the overload operation status monitoring system of the main transformer in the unattended wind power substation is proposed.The system hardware is composed of electric energy metering module,data processing module and monitoring terminal module.On this basis,the system software is designed,that is,the load of wind power unattended substation is classified through resistance,capacitance and sensibility,and the overload of main transformer is accurately located through Matlab wavelet analysis,so as to extract the characteristic quantity of load state.Comprehensive fuzzy evaluation is used to comprehensively consider different load characteristic quantities,and the weight ratio of different parameters is set to obtain the quantitative monitoring results of overload operation status of main transformer of substation.The simulation results show that the proposed method can effectively reduce the low operation energy consumption,obtain more accurate monitoring results,and the practical application effect is better.