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The following topics are dealt with : distribution system; dispersed generation; risk assessment; power system reliability analysis; power system stability; power system control; energy access and power electronic device; power system protection; power system automation; power system economics; and critical infrastructure analysis.
The value setting of the traditional distance protection has become very difficult for the distribution system with distributed generators (DGs) owing to the randomness of the DG output power. This paper proposes a new adaptive distance protection scheme to solve this problem. Firstly, on the basis of the connected point of DGs, the protected feeders are divided into different zones, with adaptive...
With the development of State Strong Smart Grid, optical current transducer based on Faraday magneto-optical effect will become an ideal transducer to service the grid. However, due to the impact of temperature drift in practice, it can not work in the long-term stable situation. To solve the problem, the double closed-loop self-tuning method is proposed in this paper for the first time. This system...
For digital distance relays, in order to get the correct measuring impedance, phase selector is widely used to identify the fault phases first. However, when a fault occurs at the line during power system swings, the traditional sequence component based phase selector might not identify the fault phase correctly, which leads to mal-operation of distance relays. Therefore, how to improve the existing...
To avoid undesired operation of backup protection caused by load encroachment under cascading failures, the methodology for vulnerability assessment of backup protection is studied. In this paper, the vulnerability assessment of backup protections is formulated as a mixed integer nonlinear programming problem, which is solved by the binary particle swarm optimization approach. The measurement index...
This paper presents a simple and effective approach based on two dynamic matrixes of node-relay matrix (NRM) and relay-incidence matrix (RIM) to determine minimum break point set (MBPS) for coordination of the directional relays. Firstly, the NRM and RIM are defined and their calculation methods are developed. Then, some optimization operations for network reduction and special structure are presented...
Wide Area Measurements using Phasor Measurement Units have become an important component of modern power system monitoring. Several applications of this technology have been reported in the literature. What is lacking at this time is an assessment of communication requirements of those applications. This paper summarizes the various applications of Wide Area Measurements that have been proposed, and...
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