|
| 摘要: |
| 电压稳定负荷裕度分析常用的方法主要有连续潮流法和原-对偶内点法。利用IEEE118节点系统和一个实际的电力网络作为算例,对2种主要算法进行了对比分析。在计算精度方面,两者计算结果差别并不是很大,当内点法选取的变量约束与连续潮流相当时,计算结果令人满意;在可靠性方面,内点法作为一种迭代算法,当计算无法达到收敛条件时无法给出最终结果,而建立在潮流计算上的连续潮流一般情况下可以给出满意结果;在计算灵活性方面,连续潮流可以灵活地设定负荷增长方式、调整负荷增量分摊顺序,而且在计算过程中可以考虑输电线路的开断操作,计算结果符合系统实际运行情况,更具有实用价值。另外,连续潮流具有丰富的计算中间信息,因此连续潮流法较内点法有着较大的优势。 |
| 关键词: 电压稳定,连续潮流,内点法,负荷裕度 |
| DOI： |
| 分类号:TM711 |
| 基金项目:国家自然科学基金 |
|
| Comparison between CPF and PDIP for voltage stability margin evaluation |
|
WEN Xuehong YUAN Yue JU Ping
|
| Abstract: |
| CPF(Continuation Power Flow method) and PDIP(Primal-Dual Interior Point method) are normally used in the margin evaluation of voltage stability. They are compared with an IEEE 118-bus system and a real power grid as examples. The computational accuracies of both methods are nearly same and satisfying when their boundary conditions are comparative. As for the reliability, PDIP is an iterative algorithm and there will be no results if the convergence conditions are not satisfied,while CPF is based on power flow computation and the satisfying results are normally reached. In CPF,the load increase modes can be flexibly selected,the power generation sequence adjusted,and the switching operation of transmission line considered,which makes the computational results more realistic. Moreover,there is rich useful intermediate information of CPF. The conclusion is that CPF is superior to PDIP. |
| Key words: voltage stability,continuous power flow,interior point method,load margin |
