静态电压稳定机理分析  

Mechanism Analysis of Static Voltage Stability

作　　者：张衍 张文杰 李华龙 ZHANG Yan;ZHANG Wen-jie;LI Hua-long(State Grid Hefei Power Supply Company,Hefei 230001,China)

机构地区：[1]国网合肥供电公司,合肥230001

出　　处：《价值工程》2024年第34期20-23,共4页Value Engineering

摘　　要：本文从解的存在性、P-V曲线两个角度计算分析了静态电压失稳的机理,认为功率极限可以作为静态电压稳定极限。通过比较不同负荷特性下的功率极限性质,说明此极限值不依赖负荷模型,方便应用于静态电压稳定判别。此外,还从功率极限的角度,说明发电机无功输出限制是降低了系统功率极限值导致降低电压稳定性,而有载调压变压器则是恢复负荷功率导致系统运行状态进一步接近临界,并通过系统仿真验证了结论。This article analyzes the mechanism of static voltage instability from the existence of solutions and P-V curve calculates.The power limit can be used as the static voltage stability limit.By comparing the power limit properties under different load characteristics,it is demonstrated that this limit value does not depend on the load model and is convenient for application in static voltage stability discrimination.In addition,from the perspective of power limit,it is also explained that the reactive power output limitation of the generator reduces the system power limit value and leads to a decrease in voltage stability,while the on load tap changer transformer restores the load power and further approaches the critical operating state of the system.The conclusion is verified through system simulation.

关 键 词：电压稳定 功率极限 动态特性 

分 类 号：TM721[电气工程—电力系统及自动化]