On the condition that Suizhong power plant is connected to the North China side AC network from the Northeast side AC network in Gaoling converter station, theoretically, the northeast side of reactive power disposition and AC filter design are checked by reactive power balance analysis and flow calculation, which has been unable to meet the requirement of the operation of the converter station. This paper proposes a new reactive control strategy for the special design of the new two SC capacitors controlled by one circuit breaker. Subsequently, the feasibility of the new reactive power control strategy is verified by field test. The new filter can meet the needs of large load operation Gaoling converter station.