An Improved Under-Voltage Load-Shedding Control Scheme for Power Network Based on Mean Spectral Radius Method

Under-voltage load-shedding (UVLS), which executes load shedding round by round, is one of the most effective ways to solve the under-voltage problem. However, the traditional UVLS has the problems of large load shedding and slow voltage recovery. To tackle these problems, this paper proposes an improved UVLS based on the mean spectral radius method (MSR). Firstly, the MSR of the power network is constructed by building a high-dimensional random matrix. Secondly, the voltage vulnerability of the power system is identified by building the voltage weak evaluation index based on MSR. And then, an improved UVLS control scheme is proposed based on the voltage vulnerability. Finally, the effectiveness of the proposed UVLS is validated in the IEEE 10-generator 39-node power system. The proposed UVLS has the advantages of less load shedding, better economy, and fast voltage recovery.