【正文】 rs are implemented by iterative generalized integrators are used, the harmonic attenuation rate is shown in . illustrates that the5th, 11th, 13th, 17th and 19th harmonic current are eliminated effectively by reason of generalized integrators.Steadystate experimental results are shown in (a) shows the experimental waveform of load current。 bottom: its frequency spectrum.. Dynamic simulated current waveforms for hybrid filter pensation. Top: simulate system line current。 bottom: its frequency spectrum. Simulated current waveforms for hybrid filter pensation. Top: simulate system line current。附錄附錄一：英文文獻A 10KV Shunt Hybrid Active Filter for a Power DistributionSystemAbstract—this paper analyzes the pensation performance of a shunt hybrid active power filter. The hybrid active power filter, which bines passive filter and active power filter, has both respective merits, and is an important developing trend of filtering device. The hybrid active power filter can reduce the capacity of active power filter effectively and is more suitable for the engineering application for high voltage nonlinear loads. The pensation performance of hybrid active power filter is analyzed by estimating the effect of different active power filter gain and parameters change. Then, a conclusion has been obtained that the harmonic attenuation rate is insensitive to the variation of passive parameters when the active power filter with an enough feedback gain is bined. Finally, the feasibility and validity of proposed scheme is verified by Simulation using Matlab and a hybrid shunt active power filter prototype. Index Terms:Current harmonics pensation, active power filter, passive filter, generalized integrators. I .INTRODUCTION In the development of power electronics brings convenience to energy conversion and utilization and also causes power quality problems. As one of the key technologies in bating power grid pollution and improving the power quality, active power filter (APF) has bee a new research emphasis in power electronics technology[1][5]. Because of high initial cost, the further application of active power filter is restricted. The HAPF(Hybrid Active Power Filter), bination of APF and passive filter (PF), can reduce the capacity of Affectively and is more suitable for the engineering application of APF for high voltage nonlinear loads.Traditionally, Passive filter has been used to eliminate the harmonic in power system due to his low cost and high efficiency. A passive filter shows the low impedance at tuned frequency to absorb current harmonic and has a good pensation performance. However, passive filter has the disadvantage of depending on the parameters of power system, susceptible to the load and power system resonant and the characteristic change due to aging. In addition, passive filter usually is designed with fixed parameters, which can not be lightly adapted for the variation operation condition.Active power filter has been developed to overe of disadvantages of passive filter and can provide flexible and reliable pensation, but is not a costeffective solution duet the high operation cost.Because of the drawbacks of passive filter and active power filter, the research on hybrid active power filter has bee more attractive [6][9]. Hybrid active power filter posed of passive filter connected in series to an active power filter improves the pensation performance of passive filter remarkably, give more flexibility and reliability to filter device, and redound to the use of active power filter in highpower system avoiding the expensive initial cost.In this paper, the pensation performance of hybrid active power filter in an industrial power distribution system is analyzed by estimating the effect of different active power filter gain and parameters change. Finally, the pensation of hybrid active power filter is verified by simulation and a laboratory prototype. The passive filter of prototype was tuned at the seventh harmonic and the generalized integrators are used to eliminate th