摘要
在电力系统接入分散电源的情况下,采用P-U曲线、Q-U曲线法研究OLTC变比调整对接入分散电源系统静态电压稳定性的影响.基于含有分散电源和OLTC的系统模型,以负荷节点和OLTC二次侧为研究对象,分析在OLTC变比变化过程中这两点的P-U与Q-U曲线变化特性,得出下述结论:OLTC的变比调整改变了负荷节点的最大功率和临界电压及传输系统的极限传输功率和临界电压,进而影响系统的静态电压稳定性;另外分散电源的调压范围有限,其不能替代OLTC在系统中进行电压调整所发挥的重要作用,可综合利用两者的特性提高系统的静态电压稳定性.
Considering the case of power system connected the distributed generation,the influence of OLTC ratio adjustment on static voltage stability is researched by using the methods of P-U and Q-U curves.Based on the system with OLTC and DG,taking load node and OLTC secondary side as research objects,variation characteristics of P-U and Q-U curves between the pre and post transformer ratio adjustment are studied,and we can get the following conclusion：the maximum power and critical voltage of load node combined with the maximum transmission power and critical voltage of transmission system are changed by OLTC ratio adjusting,so that static voltage stability is affected.Moreover,the operating voltage range of DG is so small that it can not replace the effect of OLTC on the voltage adjustment of power system,but the features of OLTC and DG can be used to improve the level of static voltage stability.
出处
《河南科学》
2013年第6期784-788,共5页
Henan Science
基金
榆林学院高层次人才科研启动基金项目(12GK42)
