摘要
提出了一种基于电压崩溃指数的极限传输容量计算模型和实用化算法。该方法与传统连续性方法相比具有如下四个特点:以原始牛顿法为潮流计算核心,不会出现连续潮流扩展雅可比矩阵奇异的现象;根据雅可比矩阵信息计算相应的电压崩溃指数,该参数可以引导整个状态推演过程,将系统负荷(或发电)状态准确定位至功率极限点;利用雅可比矩阵信息自动选取合适的状态推演步长,确保全网负荷(或发电)变化能够准确地向系统临界点逼近;整个推演过程以雅可比矩阵为计算核心,不需要每步状态推演都有完整的牛顿迭代过程,从而使计算速度大幅提升。对诸多系统的数值分析表明,该方法在保证计算结果准确性的前提下具有较高的计算效率。
A voltage collapse indices based method for practical computation of total transfer capability is proposed. Compared to the traditional continuation power flow method, the proposed method has the following four characteristics: the proposed method is based on the original Newton method for power flow calculation, and won't appear continuation power flow extended Jacobian matrix singular phenomenon; voltage collapse indices would be calculated according to Jacobian matrix, this parameter can lead the whole state dispatched process, the system load(and power generation) state accurate positioning to the turning point; the proposed method would select appropriate inference step size automatically according to Jacobian matrix to ensure the entire network load(and power generation) approaching to the system turning point accurately; the whole state dispatched process is based on the calculation of the Jacobian matrix without every state dispatched step having complete Newton iterative process, So that the computation speed can be improved significantly. Many system numerical analyses indicate that the proposed method has a high computational efficiency in the premise of ensuring the accuracy of the calculations.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第10期213-221,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51377068)
国家电网公司重大专项资助项目课题(SGCC-MPLG001(026)-2012)
国家高技术研究发展计划(863计划)(2011AA05A119)资助项目
关键词
电压崩溃指数
极限传输容量
状态推演
步长控制
Voltage collapse indices,total transfer capability,state dispatched,step size controlling
