Typical Fault Analysis and Treatment Measures for Series Compensation Device

In view of the faults occurred during the operation of 500kV Xinshi II series compensation capacitor compensator, such as the three-phase inconsistent protection action of circuit breaker and the by-pass circuit breaker closed by the MOV protection action of metal oxide limiter and so on. According to the principle and structural particularity of Xinshi II line series compensation, combined with Xinshi II line series compensation protection action and recorded wave data, the causes of fault are analyzed. By replacing fault components, optimizing protection program, modifying protection logic, strengthening equipment manufacturing technology and equipment maintenance, the anti-interference ability and operation stability of series compensation are improved. Field operation shows that the improved measures will eliminate the hidden danger of Xinshi II series compensation, and prove the correctness and effectiveness of the preventive measures.