精确的电力系统故障计算  

Accurate calculation of power system fault

作　　者：陈朝煜 CHEN Chaoyu(Fujian mechanical and electrical architectural design and Research Institute,Fuzhou 350001)

机构地区：[1]福建省机电建筑设计研究院

出　　处：《福建建筑》2019年第8期85-89,共5页Fujian Architecture & Construction

摘　　要：精确的电力系统故障计算,需要计及发电机直轴次暂态电抗(x d″)与交轴次暂态电抗(x q″)的差别,目前故障计算都未能考虑这个差别。其实,精确的电力系统故障计算,应以修改导纳矩阵法为基础,首先将复数的网络方程转换为实数方程,然后将发电机以dq轴为坐标的回路方程通过转子位置角转换为以系统公共坐标的方程,使发电机的回路方程融入系统正序网络实数方程,最后求解新的三序网络实数方程,求得节点的三序电压。The accuracy of power system fault calculation requires the difference between the direct reactance(x d″)of the generator and the secondary transient reactance(x q″),but the difference is not taken into account at present.Actually,The accuracy of power system fault calculation,Based on the modified admittance matrix method,the network equation of the complex number is converted into a real equation firstly,and then the loop equation of the generator is converted into a common coordinate equation through the rotor position angle by the rotor position angle of the DQ axis,and the generator's loop equation is integrated into the positive sequence network real equation.Finally,the new three order is solved.The three order voltage of the node can be obtained by the network real number equation.

关 键 词：电力系统计算 导纳矩阵 次暂态 

分 类 号：TU855[建筑科学]