面向大型新能源基地小干扰稳定性提升的调相机选址方法  

Siting Method of Synchronous Condenser for Small-signal Stability Improvement of Large-scale Renewable Energy Base

作　　者：王康 李子恒 杨超然 李琦 刘晨曦 辛焕海[3] WANG Kang;LI Ziheng;YANG Chaoran;LI Qi;LIU Chenxi;XIN Huanhai(State Grid Shaanxi Electric Power Co.,Ltd.,Xian 710048,China;State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430072,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]国网陕西省电力有限公司,陕西省西安市710048 [2]国网湖北省电力有限公司,湖北省武汉市430072 [3]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2022年第4期66-74,共9页Automation of Electric Power Systems

基　　金：国家电网公司科技项目(SGSN0000TKJS2001713)。

摘　　要：随着电力电子设备的并网规模增加,电力系统电网强度相对降低,小干扰失稳风险增加。调相机可为大规模电力电子设备馈入的电力系统提供电压支撑,降低系统失稳风险,但量化调相机对系统稳定性提升效果的研究尚不成熟,选址规划方法缺乏。为此,文中首先建立了含调相机的多馈入系统动态模型;其次,揭示了调相机提升系统电网强度和提高系统稳定裕度的机理;最后,从提升系统稳定裕度的角度研究了调相机优化选址的方法。通过改进的2区4机系统和39节点系统的仿真算例验证了所提方法的有效性。With the increasing integration of power electronic devices into the power system, the strength of the power grid is relatively weakened, and the system faces higher risk of small-signal instability. Synchronous condensers can provide voltage support for the power system fed by large-scale power electronic devices, which reduces the risk of the system instability.However, the quantitative research on the effect of synchronous condensers on system stability improvement is not mature, and the siting planning method is inadequate. To this end, the dynamic model of multi-infeed system integrated with synchronous condensers is first established. Then, the mechanism that synchronous condensers improve the strength and the stability margin of the system is theoretically deduced. Finally, the optimal siting method of synchronous condensers is studied from the perspective of improving the stability margin of the system. The effectiveness of the proposed method is verified through simulations on a 2-area 4-machine system and a 39-bus system.

关 键 词：“双高”电力系统 小干扰稳定 选址规划 短路比 同步调相机 

分 类 号：TM712[电气工程—电力系统及自动化]