Applied Research On The Key Technologies Of Shunt Active Power Filter (SAPF)

In recent years, with the development of power electronics technology, power electronic devices have become an increasingly widespread application. They generate harmonic and reactive power which leads to variety of hazards of power grid by greater and greater. As a new kind of harmonic and reactive comprehensive compensation system, shunt active power filter (SAPF) is the focus of research in the field of power quality. Now, Product of SAPF is looking forward to come out in our country. It is bound to promote the industrialization development of APF. Therefore, applied research on the key technologies of SAPF has become one of the most cutting-edge issues of the most important research on SAPF.The working principle and developing situation of SAPF are systematic analyzed in this paper. Harmonic current detecting module of SAPF is designed with theory and simulating tools. Base on adaptive harmonic detecting principle, a good detecting effect by the improving three-phase adaptive harmonic detecting method, with simple structure and easy hardware implementation. In response to the problem with speed and accuracy of traditional current tracking control of SAPF can not be better co-ordination, the space vector control method is to draw into. The voltage inverter device is looked as a whole, in order to synthetic and track with space rotating vector of modulating wave with limited Static Vectors in the space of Vector control, So that the synthetic vector with information of modulation wave. The speed of the tracking is increased, also with the accuracy of compensating increased. The DC-side voltage is effectively stabilized control by used of PI control of energy instead of traditional PI control. At the same time, the PI parameters are designed to achieve good control. Meanwhile, SAPF applied to the three-dimensional parking system is the first time. The practical problems with using SAPF in specific load are analyzed, including the choice of Main circuit, parameters designed, and so on. SAPF model and the three-dimensional garage system harmonic model of an enterprise are to build up, in order to test the simulation results to the compensating effect with using SAPF. Simulated on the characteristics load and parking systems respectively, a good compensating effect with the SAPF designed to the current harmonic is showed.In this paper, applied research on the key technologies of SAPF is done, which has laid a theoretical foundation and provided technical support for the future developing with the device of SAPF to promote the further development of domestic industries.