The measurement of partial discharge（PD）is an effective method to monitor the insulation condition of stator windings. In this paper

an algorithm for partial discharge signal acquisition based on quasi-integration is proposed to overcome the defect in partial discharge time domain signal processing method

and to improve the accuracy and resolution of the partial discharge monitoring system. The influences of the quasi-integration parameters on pulse resolution and calculation are analyzed

the suited parameters are selected for generator PD monitoring and the algorithm is implemented through FPGA. A typical fault PD model and a on-line generator PD monitoring system are established in laboratory

and the rationality of the captured fault PD spectrum is analyzed. Simulations and experiments verify the feasibility and reliability of the proposed method for monitoring generator PD based on quasi-integration.