根据电力网的具体情况和运行方式来判断选用什么型号的微机消谐装置.我们不妨先探讨一下电力系统的中性点运行方式.在三相交流电力系统中,作为供电电源的发电机和变压器的中性点,有三种运行方式:一种是电源中性点不接地;一种是电源中性点经微机消谐装置接地;一种是电源中性点直接接地.前两种合称为中性点非有效接地,或小电流接地系统,后一种中性点直接接地称为中性点有效接地,或大电流接地。 According to the specific conditions and operation mode of the power grid to choose what type of computer harmonic elimination device. We try to explore the neutral point of power system operation mode. In a three-phase ac power system, as the power supply of generator and transformer neutral point, there are three operation modes: power is a kind of neutral point grounding; One is the power neutral point via the microcomputer anti-harmonic device grounding; Is a kind of power supply neutral directly grounded. The first two as neutral point is not effective grounding, or the small current grounding system, a kind of neutral point grounding directly after referred to as the neutral point grounding effectively, or large current grounding. 微机消谐装置全称是微机电力消谐振诊断消除装置,它是放在PT的二次消除铁磁谐振的仪器.微机消谐装置与一次消谐器的区别在于微机消谐是一个消谐仪器,具有分析、记录、打印、上传等优势,但也有只有能用于室内、消谐范围窄（只能消除工频、三倍频、二分频、三分频等指定频率谐振）等缺点.市场上的微机消谐型号大都是厂家自己命名,功能大致相同,没有统一的标准,所以消费者比较难以理解,除了参数外还有详细功能上一定要清楚。 Computer harmonic elimination device full name is the microcomputer to eliminate electric power harmonic elimination diagnosis device, it is in front of PT secondary instruments eliminate ferroresonance. Computer harmonic elimination device and the difference between a harmonic elimination device computer harmonic elimination is a harmonic elimination apparatus, with the advantages of the analysis, recording, print, upload, but there are only can be used for indoor, narrow scope of harmonic elimination (three times can eliminate power frequency, frequency, binary or three points frequency specified frequency resonance) shortcomings. Such as the computer harmonic elimination model on the market are mostly factory name, function is roughly same, there is no uniform standard, so consumer is hard to understand, in addition to the parameters and the detailed function must be clear.