Impacts of Protection Cooperation on Voltage Sag Frequency and Sensitive Equipment Trips
When faults happen to the power system components, the duration of voltage sags is determined by the cooperation of protection system. Many literatures have been done in analyzing the factors which influence the magnitude of voltage sags, but the impact of protection cooperation on sag duration is not considered by existing studies. In order to estimate the duration of voltage sags more precisely, the novelty of the proposed approach is in probabilistic modeling of the cooperation of the protection system using the concept of Markov state space, then voltage sag frequency and sensitive equipment trips considering protection cooperation can be estimated by utilizing the configuration and setting value of the protection system. The proposed method was applied to the IEEE 57-bus test system, and the simulation results show that the proposed method is practical, simple and adaptive.
Pengcheng Wang, Xiangdong Liu and Yongquan Han
L. P. Chen et al., "Impacts of Protection Cooperation on Voltage Sag Frequency and Sensitive Equipment Trips", Advanced Materials Research, Vols. 605-607, pp. 819-823, 2013