Active Power Filter ( APF ) is connected in parallel with the loads.A current generator (power unit) that converts the control signals generated by the filter controller into the filter compensation current. A filter controller that determines the anti-harmonic current to be injected based on the line current measurements and the user’s requirements. The line current measurements are obtained from current transformers (CTs) . The user enters his requirements by means of the user interface.
1）Flexible compensation method：Compensate for harmonics only, compensate for reactive power only, compensate for both harmonics and reactive power，could compensate for 2th-25th harmonics or compensate for specific harmonics;
2）Ability of managing three-phase imbalance;
3）Linear compensation，Response time ≤ 5ms;
4）Humanized human-computer interaction interface, which displays real-time power quality information of the system and the ontology. This interface has the ability to control the device remotely and easy to operate;
5）Adopt imported IGBT which has high power density and high reliability;
6）Using DSP digital control system for high speed detection and calculation;
7）With remote communication interface, real-time monitoring through PC;
8）Standard modular design which reduces lead times and increases reliability and maintainability.
Full response time≤5ms，Instantaneous response time≤100μs
Total harmonic compensation rate
≥ 97%，3th/5th/7th/9th independent compensation rate ≥ 98%
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