Noise suppression is classified into two classes: Passive Noise Control and Active Noise Control.
噪声抑制方法可以分为两大类：被动噪声抑制和主动噪声抑制。
The methods of harmonic suppression were introduced, such as adopting passive power filter (PPF), active power filter (APF), hybrid filter and harmonic protective device (HPD).
介绍了谐波治理的方法，即采用无源滤波器、有源滤波器、混合型滤波器及谐波保护器，举例说明了谐波保护器的应用。
Passive DF and crossing location method is an important approach of the interference suppression technology for radar networks.
无源测向交会定位是雷达组网抗干扰的重要途径。
When the passive filter is applied in harmonic suppression, the harmonic current may flow through the circuit breaker and filter branches.
采用无源滤波器治理谐波时，谐波电流会在母联断路器和各支路间流动。
When the passive filter is applied in harmonic suppression, the harmonic current may flow through the circuit breaker and filter branches.
采用无源滤波器治理谐波时，谐波电流会在母联断路器和各支路间流动。
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