Research on Leading Power Factor Depth Limit of Non-salient Synchronous Generator with Constraint in Leading Power Factor Test

Based on the leading power factor test guidelines of synchronous generator, the calculation method of leading power factor depth limit constrained by generator power angle is presented, and the impact of system reactance on system static stability with power angle limited is studied. Meanwhile, the values of terminal voltage and stator current are checked and the modification of leading power factor depth limit is given if these values are over-limit. Taking #1 generator unit of Ruijin thermal power plant for example, the PQ curves of leading power factor depth limit changing with active power are showed under different system voltage conditions. The results considering constraints of leading power factor test can provide references for experimenters to control leading power factor depth so as to ensure the safety and stability of generator in the tests.