超高压同杆双回线三处故障的计算  

Calculation of Three Faults of EHV Double Circuits Transmission Lines

作　　者：林军[1,2] 严利雄 王汇[3] 

机构地区：[1]福建工程学院,福建福州350108 [2]福州大学电气工程学院,福建福州350108 [3]国网湖北省电力公司检修公司,湖北武汉430050

出　　处：《华北电力技术》2016年第2期1-5,共5页North China Electric Power

基　　金：国家电网公司科技项目资助(合同号:NWG-DD-QT[2011]164);福建省自然科学基金资助项目(2008J0011);福建省科技计划重点项目(2009H003)

摘　　要：为解决同杆双回线故障计算复杂的问题,采用相分量直接计算的方法。用0,1,2分量进行超高压同杆双回线故障计算时将遇到零序分量间存在零序互阻抗和零序互电纳的问题。采用特征模量分解方法对同杆多回线间的零序参数解耦,并给出了同杆双回线零序参数特征模量分解矩阵,通过特征模量分解得到同杆双回线路两端之间的零序电量关系。对正序、负序和零序分量进行对称分量反变换,构成转移矩阵,采用相分量对同杆双回线三处故障计算,算法采用分布参数的线路数学模型,与仿真结果比较表明,该方法完全正确。说明复杂的问题可以采用基本的数学方法得到完美的解决。In order to solve the complicated problem of double circuit transmission line on the same pole,the method of direct calculation of phase components is adopted. There are mutual impedance and mutual admittance in zero se- quence network of double circuits that makes it difficult to calculate fault circuits by symmetry component method. This paper introduced an eigen-mode decomposing method to decouple zero sequence parameter in double circuit. The decomposing matrix of eigen-mode component is given. The zero sequence component relationship between volta- ges or currents at two terminals of double circuits was achieved by composing eigen-mode components. Positive, nega- tive and zero sequence components form transfer matrix and the fault calculation of EHV double circuits can be real- ized. Distributed transmission line model was adopted in the algorithm and the algorithm has higher accuracy. The fault calculation method for 3 crossing line faults of double-circuit on the same pole is given. Comparing with simula- tion results proved the method completely correct. This illustrates that some complicated problem can be perfectly re- solved by basic math method.

关 键 词：对称分量 同杆双回线 故障计算 零序 解耦 

分 类 号：TM461[电气工程—电器]