A State Predictive Approach to Mitigate Communication Latency and Data Loss for Wide Area Control of Power System

Communication latency and data loss in wide area control (WAC) raise serious concern in power system stability. In this regard, the predictive control techniques provide effective solution. In this paper, a state predictive control (SPC) approach is proposed to compensate communication latency and data loss. Unlike earlier techniques, the proposed method predicts the state variables of close loop WAC in sequence to provide control inputs. The prediction is performed using available data frame and associated weights. The variable weights are the function of state space matrices of WAC. Due to latency or data loss, the frame misses single or multiple data. In such situations, SPC fills the gaps with predicted data before computing further prediction. The effective performance of proposed SPC is tested in New England 39-bus system. The results are compared with network predictive control (NPC) and wide area predictive control (WAPC) techniques and found to be more effective.