引用本文: | 罗福玲,胡志坚,倪识远,等.三相不对称T型输电线路参数测量方法研究[J].电力系统保护与控制,2018,46(4):41-49.[点击复制] |
LUO Fuling,HU Zhijian,NI Shiyuan,et al.Study on measurement method of parameters of three-phase asymmetrical T-connection transmission lines[J].Power System Protection and Control,2018,46(4):41-49[点击复制] |
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摘要: |
传统的T型输电线路参数测量方法基于线路的三相参数对称,没有考虑线路三相不对称对参数测量的影响,而现有的不对称输电线路参数测量方法不适用于含T型接线的特殊输电线路。提出了三相不对称T型输电线路参数测量方法,应用Levenberg-Marquardt(简称L-M)优化算法求解输电线路非线性参数方程组的参数。通过PSCAD软件对单回不对称线路参数测量方法的仿真,验证了用L-M算法计算非线性方程组参数的可行性。然后对所提出的不对称T型输电线路参数测量方法进行了仿真,验证了所提出的不对称T型输电线路参数测量方法是正确可行的。 |
关键词: 不对称线路 T型线路 线路参数 参数测量方法 L-M算法 |
DOI:10.7667/PSPC170106 |
投稿时间:2017-01-18修订日期:2017-03-24 |
基金项目:高等学校博士学科点专项科研基金项目(2011014 1110032) |
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Study on measurement method of parameters of three-phase asymmetrical T-connection transmission lines |
LUO Fuling,HU Zhijian,NI Shiyuan,FU Chenyu |
(School of Electrical Engineering, Wuhan University, Wuhan 430072, China) |
Abstract: |
The traditional parameter measurement methods of T-connection transmission lines are based on the symmetry of three-phase parameters of the lines, without considering the influence of the asymmetry of three-phase lines on the parameter measurement. The existing parameter measurement methods of asymmetrical transmission lines are not applicable to the T-connection transmission lines. A parameter measurement method of three-phase asymmetrical T-connection transmission lines is proposed. The Levenberg-Marquardt (L-M) optimization algorithm is applied to solve the parameters of the nonlinear parameter equations of the transmission lines. The feasibility of using the L-M algorithm to calculate the parameters of the system of nonlinear equations is verified by the simulation of parameter measurement method of the asymmetrical single-circuit line in PSCAD. Then, the parameter measurement method of the asymmetrical T-connection transmission lines proposed is simulated, which proves that the parameter measurement method of the asymmetrical T-type transmission line is correct and feasible. This work is supported bySpecialized Research Fund for Doctoral Program of Higher Education (No. 20110141110032). |
Key words: asymmetrical lines T-connection transmission lines line parameters parameter measurement method L-M algorithm |