特高压同步电网构建方案论证及安全性分析

目前,我国电网基本实现了全国互联,全国形成了东北-华北-华中、华东、西北、南方 4个主要同步电网。未来我国同步电网的构想中将东北-华北-华中电网调整为华北-华中-华东同步电网,以特高压为骨干网架,全国形成华北-华中-华东、西北、东北、南方 4个主要的同步电网。特高压同步联网可实现长距离、大容量输电,促进跨大区、跨流域水火电互济和更大范围资源优化配置提供网架支持,避免出现通过 500kV交流线路联接大区电网存在的动态稳定问题,同时可解决 500kV电网短路电流超标问题。

Scheme Study and Safety Analysis of UHV Synchronous Power Grid Composition

Currently, most of our nation's power grids are interconnected. There are four major nationwide synchronous grids, which are northeast-north china-center China, east China, northwest, and south grids. In the planned future synchronous power grid, the northeast-north china-center China grid will be adjusted to north china-center China-east China grid, and using UHV grid as backbone, four major synchronous grids, which are north china-center China-east China, northwest, northeast and north grids, will be formed. Interconnected UHV synchronous grids have such benefits as long-distance and large capacity power transmission; facilitating hydro and thermo power supplementation among large areas and drainage areas; provide grid support for optimum resource allocation; avoiding dynamic stability problems that exists in 500 kV AC lines when connecting large grids; solving the 500 kV grid short-circuit current over limit problem.