摘要
随着国家对风资源的大力开发利用,大规模风力发电基地逐渐形成,但是我国能源资源与能源消费呈逆向分布,大量风电需要通过跨区高压输电线路外送。由于风电本身具有随机性、间歇性和不可控等特性,风电需要与常规能源水电、火电组合外送。风水火打捆外送,在带来巨大经济效益的同时也引起电网安全稳定性发生变化。系统发生故障后仅切除常规水电机组、火电机组难以保证系统稳定运行或代价过大。本文分析了风电机组、水电机组和火电机组各自对稳控切机的影响,指出了优先切风电机组、水电机组和火电机组各自的优缺点,提出了风水火打捆外送系统发生故障后风电机组、水电机组和火电机组的优化切机方案。运用PSASP程序对某实际电网仿真,验证了优化切机方案在保证故障后系统安全稳定运行的基础上,能显著降低系统稳定恢复所需切机量,改善故障后系统恢复特性,大大提高系统运行的安全性和经济性。
As the state＇s vigorous development and utilization of wind resources, large-scale wind power bases have been gradually formed, but in our country the energy resources and energy consumption show a reverse distribution, and large amount of wind power requires transmitting through high-voltage transmission lines. Due to the random, in- termittent and uncontrollable characteristics of wind power, so wind power needs to be combined with conventional hy- dropower and thermal power in transmission. Thermal/hydro/wind bundled power transmission can bring huge eco- nomic benefits, but also cause changes in grid security and stability. In the event of system failures, the removal of the conventional hydropower and thermal power unit is not enough to guarantee the stable system operation or costs too much. This paper analyzes the influence of wind power, hydropower and thermal power unit on stability control gener- ator tripping respectively, points out their advantages and disadvantages as preferred tripped generator, then puts for- ward the optimization of generator tripping program in the event of bundled power transmission failures. The actual power grid simulation using PSASP program verifies that this optimization scheme can guarantee the safe and stable system operation after faults, significantly reduce the amout of generator tripping required for the system stable recov- ery, improve the system recovery features after faults, and greatly enhance the safety and economy of system opera- tion.
出处
《华东电力》
北大核心
2014年第2期269-274,共6页
East China Electric Power
基金
国家自然科学基金项目(51267017)~~
关键词
安全稳定控制装置
风水火打捆
暂态稳定
切机
电压稳定
security and stability control device
thermal/hydro/wind bundled power
transient stability
generatortripping
voltage stability
