Most of the large capacity synchronous condensers are centrally located in converter stations, which have limited effect on voltage stabilization in the vicinity of the field stations. But the small capacity distributed condenser is configured in the new energy field station, which can stabilize the voltage of the interconnection point and effectively solve the problem of new energy chain off-grid. In order to maximize the dynamic reactive power of the condenser, the influence of excitation parameters on dynamic characteristics are mainly studied. Firstly, after analyzing the relationship between the reactive current and output reactive power, an effective reactive current gain is determined as an evaluation index to measure the dynamic characteristics of the condenser. Through the frequency domain sensitivity analysis of the index, the dominant excitation parameters affecting the dynamic characteristics and their optimization laws are revealed. The dynamic reactive power output of the condenser before and after the optimization are compared by simulation. The results show that the dynamic characteristics of the condenser can be improved by optimizing the excitation parameters using frequency domain sensitivity.

distributed synchronous condenser，excitation parameters， dynamic characteristics， frequency domain sensitivity， effective reactive current gain