Coordinated Optimization of Generator Control System to Improve Transmission Capacity of Power System with Environment Friendly Effects

Guanhong Wang, Taorong Gong, Ying Li, Yuting Liu, Liming Jin, Wenfeng Li, Yong Tang

Ekoloji, 2019, Issue 107, Pages: 1123-1129, Article No: e107132

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Abstract

Because the dynamic stability is limited by the large disturbance in power grid, and the system damping is insufficient after the N-1 fault, which leads to the reduction of transmission and transmission capacity. In order to improve the level of dynamic stability and the limited of generating capacity of the unit, the paper studies the coordinated optimization strategy of the generator excitation control system in disturbance. The results show that the excitation system and PSS have important influence on the dynamic characteristics of the power grid. Research shows that, the parameter configuration of the existing generators control system does not meet units full power generation requirements, which has not adapted to the development of power grid. At first, according to the strategy of optimization, we carried out on-site testing. The generator without compensation phase frequency characteristic hysteresis decreases about 10 degrees brought the compensation characteristics close to -90 degrees, in addition AC gain provided by PSS is increased about 50%. Then the phase compensation is carried out for the PSS parameters. The stability level in small disturbance and large disturbance has greatly improved. Research on Optimization and implementation strategy, ability can be safe, efficient, economy improving centralized power delivery.

Keywords

coordinated optimization, dynamic stability, excitation control, power deliveryability

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