无功补偿对新能源汇集送出区域静态电压稳定极限的影响

Influence of Reactive Power on Static Voltage Stability Limit of Renewable Energy in Convergence and Transmission Area

为研究无功补偿对新能源汇集送出静态电压及稳定极限的影响,结合实际网架结构和运行特性,基于电压损耗公式,分析汇集站是整个区域电压最薄弱点,针对汇集站相对于枢纽站的电压损耗进行理论推导分析,表明静态电压主要影响因素为网架结构参数、有功功率、无功补偿,静态电压稳定极限主要影响因素只有网架结构参数,但是通过增加无功补偿可以提高电压水平,因此实际上无功补偿对静态电压稳定极限也有一定提升作用,在实际电网模型上进行仿真,观察不同容量可调无功补偿设备对母线电压、线路两侧无功功率、静态电压稳定极限影响,结果表明汇集站配置可调无功补偿设备可以提高新能源汇集送出静态电压稳定性,对静态电压稳定极限虽也有一定提升作用,但是作用有限。

In order to research the influence of reactive power on the static voltage and the stability limit of renewable energy in convergence and transmission,the actual grid structure and operation characteristics are combined in this paper,based on the voltage loss formula,firstly analyzes that the convergence station is the weakest point of voltage in the whole area,then the voltage loss between the convergence station and the hub station is analyzed,and the results show that the static voltage is mainly influenced by the grid structure parameters,active power and reactive power,the static voltage stability limit is mainly influenced by the grid structure parameters,but considering the effect of reactive power compensation on voltage,reactive power also has some effect on static voltage stability limit,the results of the simulation test on the actual grid model are consistent with the theory analysis,that is,the static voltage stability of the renewable energy in convergence and transmission can be improved by using the adjustable reactive power compensation equipment in the convergence station,it can also improve the static voltage stability limit,but the effect is limited.