在线式介损监测系统研究

Study on Online Monitoring System of Dielectric Loss

针对变电站高压容性设备介质损耗在线监测系统的电压、电流异地采集,将导致采集同步性难以保证且数据传输量大的问题,巧妙借用交流220 V电压作为参考相位,电流、电压监测终端分别计算出容性设备的电流、电压与参考相位的相位关系,作为中间结果上送主站,由主站计算出容性设备的介质损耗,形成需求报表等。避免了电流、电压采集难以同步的问题,可大幅降低系统成本和传输数据量,由于各终端分散计算,从而提高了监测系统的实时性。

The voltage and current remote collection of online monitoring system of substation HV capacitive equipment dielectric loss is difficult to ensure the collection synchronization and has higher data transmission quantity. Aiming at this problem, the current and voltage monitoring terminals calculate the relationship between current, voltage and reference phase by using AC 220 V as reference phase, which is reported as intermediate result to master station. The master station calculates the dielectric loss of capacitive equip-ment and makes the requirement report. This method ensures the current and voltage collection synchronization, significantly reduces the system cost and data transmission quantity and improves the real-time performance of monitoring system.