电力系统谐波负载模型分析与研究  

Analysis of power system harmonic load model

作　　者：卢惠辉 苏成悦[1] 张文嘉 周怀杰 刘金涛 刘力斌[1] 

机构地区：[1]广东工业大学,广东广州510006 [2]广州供电局有限公司,广东广州510730

出　　处：《现代电子技术》2013年第15期115-118,共4页Modern Electronics Technique

摘　　要：随着用电非线性负载的不断增加,电力系统中的谐波畸变问题日趋严重。讨论了常见的非线性负载,构造出一个110 kV变压为400 V,经整流变频等电路给异步电机供电的完整的非线性负载仿真模型,仅其三相桥式整流电路模块的谐波畸变率就大于32%,在模型中加入消谐模块后谐波成分大大降低,仿真结果表明其非线性负载的谐波总畸变率不大于1.40%,符合国家有关标准,为企业提供防范和治理谐波的理论依据。As the nonlinear load power increases, the harmonic distortion problem in power systems is serious. The com- mon nonlinear load is discussed in this paper. A complete nonlear load simulation model was constructed to supply power to asynchronous motor by the rectifier frequency circuits and a transformer converting 110 kV to 400 V. Only the harmonic distortion rate of the third phase bridge rectifier circuit module is more than 32%, but harmonic components is greatly reduced by adding a harmonic elimination module in the model. The simulation results show that the total harmonic distortion rate of the nonlinear load is not more than 1.40%, which complies with the relevant state standards, and provides a theoretical base of harmonic pre- vention and control for enterprises.

关 键 词：电力系统 谐波分析 负载模型 整流变频 

分 类 号：TN710.34[电子电信—电路与系统] TM401[电气工程—电器]