Network-integrated stability enhancement strategy for power system with distributed generations

This paper proposes a new computer network-integrated stability enhancement strategy for electricity power system connected with renewable-energy distributed generations. The proposed strategy aims to save a distribution system from imminent voltage collapse due to contingencies occurring in the subtransmission network, distribution network, or distributed generation circuit, by executing appropriate operations. The operations include coordinated generator controls, load tap changing, load shedding, etc. This paper shows the use of state-of-the-art digital signal processing technology for determination of correct stability controls, and the application of modern computer networking technology for monitoring of distribution system operating states and transmitting of data and stability control commands. This paper presents the design of a new two-layer architecture for network monitoring, data transmitting, and control delivering. This architecture is fault tolerant and is specially designed for monitoring distribution systems with multiple (over hundred) feeder nodes. Typical adaptive stability enhancement is illustrated.