Design Method of Active Power Filter active filter design methods, generally can be attributed to two categories cascade method and simulation. Cascade method according to the technical requirements, determine the transfer function may be physically implemented (usually be readily active filter materials and manuals Richard), and breaking it down into low-level functions (mostly second-order function) of the product harmonic control program, these low-level functions are identified by active circuitry then cascaded to achieve the original transfer function. Low order function circuit known as the basic section, there are many typical second-order basic circuit section for designers to use. The number to use at basic amplifier section can be divided into single amplifier circuit, bi-amp circuit, an amplifier circuit three or four amplifier circuits. Cascade method design process is relatively simple, easy to adjust circuit characteristics, circuit implemented more economical, it is a commonly used method. Simulation can be designed to meet the technical requirements of the LC filter as a prototype mine harmonic control, then the active circuit to simulate achieve. This method can be divided into two functional element simulation and simulation, and more with double-end terminating resistor LC ladder filter prototype. Typically, the analog method required more elements than the cascade method. BDKJ-FC I type compensation device With the wide application of power electronics technology, higher harmonics generated by nonlinear loads of modern industrial and mining enterprises enter the system power rectifier harmonic control, causing the supply voltage waveform distortion, reduce power quality, capacitor banks Unable investment, accelerate the damage electrical business equipment, the use of lower electricity rates, a waste of energy. Rectifier Harmonic _ Xi Connaught Electrical and Mechanical (certified) _ Harmonic study by Connaught Mechanical and Electrical Equipment Co., Ltd., Henan. Henan Xi Connaught Electrical Equipment Co. (www.hnxinuo.com) is Zhengzhou, electronics, electrical products processing leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In practice Connaught Electrical and Mechanical leadership with the staff warmly welcome all inquiries negotiations to create learning Connaught Electrical and Mechanical better future.