Taking the reconstruction project of Yumenkou Pump Station as an example,this paper analyzes the problems existing in reactive automatic power compensation of pump station at present,expounds the necessity of carrying out reactive automatic power compensation,and expounds the concrete implementation scheme.

In this paper,a new auto compensating system,with full functions,for hydropneumatic equili- brator is put forward,its composition and working principle is introduced.

A novel hybrid var and harmonic dynamic compensator (HVHC) is proposed in this paper, it is suitable to single-phase traction load which is varied in random and fluctuant resulting in high amount of harmonics, reactive power demand and negative sequence current.