On-Line Monitoring of Shunt Capacitor Bank Based on Relay Protection Device

In modern power systems, the installation of a shunt capacitor bank is one cheapest and most widely used methods for improving voltage profile. One composed mass units have ground, ungrounded, delta, wye connections that make configuration banks various. case long-term operation, failure single unit likely to cause uneven voltage, which will lead breakdown burning whole group, resulting in huge losses. The relay protection device can detect simultaneous current capacitor. By utilizing these data from relay, abnormal state at initial stage fault be found through monitoring slight change capacitance. Timely early maintenance repair would avoid faults potentially greater economic Capacitor different connection modes. For ungrounded wye-connected with an unknown neutral point capacitance parameters each branch cannot calculated. A parameter symmetry based on calculation method proposed. observation value, are identified statistical methods. simulation established by PSCAD verified realized effective bank.