电力系统间谐波检测方法现状与发展趋势

间谐波是一种特殊的谐波,存在于电力系统中,严重影响电网的电能质量,精确地检测出间谐波分量具有重要意义。由于间谐波具有非线性、随机性、分布性以及非平稳性等特点,在实时检测过程中具有一定的困难,故选择合适的检测方法非常重要。本文首先介绍了间谐波的来源及其在各个频率范围内的危害;其次总结了间谐波的各种检测方法,并详细论述了各种检测方法的优缺点,以利于在检测过程中选择合适的方法;同时指出了现有间谐波检测方法的不足,并讨论了间谐波检测方法的发展趋势。

Current Status and Development Trend of Power System Harmonic Detection Method

As a special harmonic,inter-harmonics exist in the power system widely,and have impacts on the power quality seriously,so it is very important to measure the inter-harmonic exactly.Inter-harmonics have certain difficulties in the process of real-time detection as a result of its non-linear,randomness,distribution,instability and so on,so it is very important to choose the appropriate detection method.The source and hazards of the inter-harmonics in kinds of different frequency range were introduced firstly in this paper,and various methods of detect inter-harmonics were summarized particularly,meanwhile the advantages and disadvantages of these methods were discussed in detail for selecting appropriate method in testing process.Furthermore,both the deficiency of the existing methods were pointed out and the trend of the development of inter-harmonics was discussed in this paper.