product details

1、 Working principle of APF/SVG

By using an external transformer CT, real-time detection of grid current or load current is achieved. The controller extracts the fundamental current and various harmonic currents of the load through fast Fourier transform, and obtains active, reactive, and negative sequence data through dq rotation coordinates. Then, an IGBT power converter generates compensation current that is equal in magnitude and opposite in phase to the compensation target (harmonic, reactive, unbalanced) and injects it into the grid to improve the power quality on the grid side.

1. Modularization

Each module unit operates independently without the need for a central controller. If any module fails, it will automatically exit, while the remaining modules will automatically share the load evenly at rated current, and the entire machine will continue to operate. Convenient for users' daily operation and maintenance.

According to the N+1 redundancy theory, for every level of redundancy in a device, its reliability increases by an order of magnitude. Modular structure is particularly suitable for users with high requirements for power quality.

2. Extremely strong anti pollution ability

All conductive components, except for the fan, are isolated from the outside world and suitable for harsh environments with severe dust, salt, and humidity. The schematic diagram of the internal structure of the module is as follows:

4. Unlimited combinations

APF, SVG, and SPC modules of different specifications can be freely combined to achieve rich functionality. APF/SVG can also be used in conjunction with third-party capacitor compensation, such as 150AAPF+50AAPF+50kvarSVG+100kvarSPC. Moreover, regardless of the form of third-party capacitor compensation or passive filtering, resonance can be avoided to ensure the safe and reliable operation of the entire power grid system. The principles of matching and the functions implemented can be found in the "More Economic Compensation Plan".

6. Extremely low loss

Thanks to a deep understanding of power electronic high-speed switching devices, APF/SVG has an active power loss of<2.5% during full load operation, while the industry's mainstream indicators are<3%~4%. Active power loss is crucial for industries such as State Grid that use SVG on a large scale!