A large amount of instantaneous energy for the distribution transformer is needed during the short-circuitimpulse test. In case of needing dedicated circuit

the impulse mode of generating unit needs synchronous switch

ad-justable impedance

generator and dedicated circuit

the site operation at site is not only low

but also has the risk ofaffecting the system stability. For solving the problem existed in the short circuit impulse of above distribution trans-former

in this paper

the storage short-circuit impulse test method for distribution transformer is proposed based ontransformer

energy storage capacitor and power electronic converter and

on this basis

a set of storage energy shortcircuit impulse test system for distribution transformer is designed

the fast adjustment of short circuit test impulsetest state is achieved and the capacity improvement is completed by the series and parallel connection of the sametype of energy storage impulse device. It is shown by the simulation and site test that the short circuit impulse test sys-tem of the distribution transformer proposed in this paper reduces greatly the requirement of short circuit impulse ofdistribution transformer to the capacity of power side and has good operational performance in the site test.