The Search And Development Of Power Relay Protection Setting System Based On Wu Hai Electric Network

Relay setting Coordination is the basis of secure operation of modern power system, and is of great importance to the reliable function of relays. Sensitivity, selectivity and speed of the protection devices could be guaranteed by the appropriate settings. In this paper, choose regional power grid relay coordination software development as the main direction of attack, the first paper to identify coordination software design, function, system architecture and development environment; and then studied graphic database based on the platform, and the network topology mix operation , Accompanied by a detailed discussion of topology and impedance changes in the parameters of the complex calculation of fault; fault on the calculation of the three important concepts: the equivalent impedance bus, the branch of the slip coefficient and the current value of a detailed analysis; to examples Help in the form of current and voltage transformer protection and the protection of the automatic and manual tuning process; the final design of the entire set of software database management system.