Critical Systems Design Of 500KV Power Grid Running Centralized Control Center

On the base of summarizing manage status of Hunan 500kV substations, this paper analyzes the feasibility and necessity of 500kv unmanned integrated automation substation and plans the realization of integrated automation system of UHV centralized control center, then the critical systems of 500 kV power grid running centralized control center are designed, the main works done in the paper include:(1) This paper adopts the design scheme of independent computer monitoring system and distributed open LAN switching technology based redundant dual-network in the design of centralized control center. The paper researches in depth design requirements, system structures and functions of computer monitoring system, remote video monitoring system and UPS system.(2) The design scheme of communication system can meet the requrements of the real-time data communication between the centralized control center and 500kV substations, between the centralized control center and power network dispatch control center, province power dispatch control center and EHV MIS. The paper studys in depth the communication channels configuration, the communication scheme and the dispatching program-controlled switch configuration of system.(3) The designs of lightning protection and surge protection of system mainly include the protection of power system and signal system, according to the characteristics of centralized control center, a set of novel, simple and reliable lightning protection scheme is designed.(4) Telecontrol system is an important part of centralized control center of 500KV power grid and dispatching automation system, for network transmission of telecontrol system of 500KV power grid, telecontrol communication protocols based on network and the choice of networking technology, the paper carrys on in-depth analysis, research and design. A perfect network access of IED is designed in the paper, through researching into IP2022 chip, the network interconnect interface based on IP2022 for meeting the interconnection between IED and telecontrol transmission network is designed, and its hardware and software respectively are achieved.(5) The paper researches in depth the design schemes and functional requirements of the main subsystems of the centralized control center, and proposes a set of comprehensive and feasible configuration scheme according to the actual condition. The main subsystems of the centralized control center include FES subsystem, SCADA subsystem and DTS subsystem.