网源稳态调压对暂态无功支撑能力的影响研究

发布时间：2018-06-15 09:01

本文选题：发电机组 + 静止电容器　；参考：《中国电机工程学报》2014年01期

【摘要】：发电机与静止补偿电容器是电网稳态电压调控的重要无功源。特高压直流送端大型水、火电机组以及受端电网电压支撑机组与主网电气联系紧密,可参与系统稳态调压。针对电力调度与运行系统中,关于稳态运行时降低机组无功出力可以增大暂态无功备用这一观点的不足之处,通过理论解析,揭示了发电机组稳态运行工况对暂态无功出力特性的影响;针对发电机与静止补偿电容器组合的网源调压系统,提出物理意义明确的暂态无功支撑能力定义以及提升该能力的稳态优化调压方案。小电网测试系统和特高压直流送、受端大电网仿真计算结果表明,增加机组稳态无功出力,可改善交流电网受扰后暂态电压恢复特性。
[Abstract]:Generators and static compensation capacitors are important reactive power sources for steady-state voltage regulation. UHV DC power supply large scale water, thermal power unit and the receiving end of the grid voltage support unit and the main network electrical connection is close, can participate in the system steady state voltage regulation. In view of the deficiency of the viewpoint that reducing the reactive power output of generating units during steady operation can increase the transient reactive power reserve in power dispatching and operation system, the theoretical analysis is made. The influence of steady operation condition of generator on transient reactive power output characteristics is revealed, and the voltage regulation system of grid source combined with generator and static compensation capacitor is discussed. The definition of transient reactive power support capacity with clear physical meaning and the steady-state optimal voltage regulation scheme to enhance the capacity are proposed. The simulation results of small grid test system and UHV DC transmission and large receiving power network show that the transient voltage recovery characteristics can be improved by increasing the steady-state reactive power output of the unit.
【作者单位】：中国电力科学研究院;国网四川省电力公司;
【基金】：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012)~~
【分类号】：TM712

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