| As the demand is growing for the electric power, the energy storage of the battery is widelyusing in intelligent grid、uninterruptible power supply(UPS) and electric car, etc. Batterycharging、supplying and feeding are the main direction of research for the battery energy storage,to realizing the two-way flow of energy.The paper has designed the bidirectional AC/DC converter for the battery energy storageand owning the function of parallel in feeding, and has given the topological structure of themain circuit, the topological structure is made from three H bridge arm, the three H bridge armare made of two system structure for AC/DC and DC/DC, the topological structure hasindependent control links realized the control system completely decoupling between power gridside and battery side. Base on this structure has analysed the principle for bidirectional converter,The paper has given the system control diagram base on the battery charging mode、supply modeand feeding mode. The simulation results show that current according to the sine changing ofpower grid side, the unit power factor rectification and the unit power factor feeding areachieved, reducing the pollution for the grid. When the battery are supplying, the system exportthe normal sine voltage, and has the great dynamic performance. Testing equipment is set up byusing the DSP2812, the experiment result shows that the theoretical analysis completely correctand the waveform is accordance between the simulation waveform and the experiment waveform,and the system runs reliably. |
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