The reactive power compensation controller is the core device for reactive power compensation. It utilizes DSP as the CPU, integrates high-precision AD sampling and dot matrix liquid crystal display, and is equipped with compact button operation. It boasts a user-friendly interface and a wide range of functions. Depending on the actual application, it is categorized into dedicated and general-purpose types. The dedicated type is primarily used in conjunction with intelligent capacitors and harmonic suppression integrated compensation modules. The general-purpose type is suitable for traditional capacitor compensation designs and can also be used for the control of adaptive intelligent capacitors.