一、微机消谐装置

1, microcomputer antiharmonic device

全称：微机电力谐振诊断消除装置是放在放在PT的二次侧（所以也叫二次消谐）消除铁磁谐振的仪器。它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，但也有只能用于室内、消谐范围较广（能消除工频、三倍频、二分频、三分频等指定频率谐振）。

Full name: microcomputer power resonant diagnosis and elimination device is placed on the second side of PT (so also called a quadratic elimination) to eliminate the instrument of ferromagnetic resonance. The difference between it and a harmonic elimination microcomputer harmonic elimination is a harmonic elimination equipment, has the advantage of analysis, record and print and upload, but there are only used in indoor, with wider range of harmonic elimination (three times can eliminate power frequency, frequency, binary or three points frequency specified frequency resonance).

二、何为谐振，以及谐振的危害？

What is the harm of resonance and resonance?

电力系统中有许多铁芯电感元件，例如变压器、电压互感器、消弧和并联补偿电抗器，这些大都为非线性元件，它和系统的电容组成许多复杂的振荡回路，如果满足一定的条件，就可激发起持续时间较长的铁磁谐振过电压。发生铁磁谐振时产生的较高过电压和较大的过电流，极易使电力设备的绝缘损坏，严重情况下危及运行人员的安全。

There are many core inductance components in the power system, such as transformer, voltage transformer, arc suppression and parallel compensation reactor, these mostly for the nonlinear components, it many complex oscillation circuit and system composition of capacitance, if meet the certain conditions, can stimulate the duration longer ferroresonance overvoltage. When the ferromagnetic resonance produced by high overvoltage and overcurrent, easy to make the insulation of the electric power equipment damage, severe cases, endanger the safety of the operators.

电力系统中有大量的储能元件，如电压互感器、变压器、电抗器等电感元件，电容器、线路对地电容、断路器的断口电容等电容元件。这些元件组成了许多串联或并联振荡回路。

There are a lot of energy storage in the power system components, such as voltage transformer, inductance components such as transformer, reactor, capacitor, the circuit of capacitance, capacitance components such as circuit breaker fracture capacitance. These components form many series or parallel oscillating circuits.

在正常的稳定状态下运行时，不可能产生严重的振荡。但当系统发生故障或由于某种原因电网参数发生了变化，就很可能发生谐振。

It is impossible to produce severe oscillations under normal steady state. But when the system fails or the grid parameters change for some reason, the resonance is likely to occur.

电压互感器一类的电感元件在正常工作电压下，通常铁心磁通密度不高，铁心并不饱和，如在过电压下铁心饱和了，电感会迅速降低，从而与电容产生谐振，这时的谐振称作铁磁谐振。铁磁谐振不仅可在基频下发生，也可在高频和低频下发生。

Kind of voltage transformer inductance components under normal working voltage, magnetic flux density is not high, usually core core is not saturated, such as core saturation under overvoltage, inductance will reduce rapidly, thus resonance with the capacitance, then the resonance known as ferroresonance. Ferromagnetic resonance can occur not only in the base frequency, but also in high frequencies and low frequencies.

微机消谐装置，对电压互感器开口三角电压（即零序电压）进行遁环检测，有效消除电压互感器各种频率的铁磁谐振。

Computer harmonic elimination device, open delta voltage to the voltage transformer (that is, the zero sequence voltage) dun detection, effectively eliminate voltage transformer various ferromagnetic resonance frequency.