Hoteam HTAPF active harmonic filter is a new active dynamic reactive power and harmonic compensation device with high cost performance that developed independently by Shandong Hoteam Electric Co.,Ltd. Who are committed to research and development of active power filter and other power electronic products for many years. this device can do real-time tracking compensation to harmonic, reactive power which changes in both size and frequency and three phase unbalance, thus can provide fast dynamic reactive power compensation and harmonic filtering for power grid and electrical loads. It can effectively improve transit stability of power grid voltage, suppress bus voltage flicker, compensate unbalanced loads, filter the harmonic and improve the power factor.