Design Of 10kW Household-use Inverter Equipment For Energy Save

With the development of global economy and people standard of living improving, it comes to be much more difficult for electric supply day by day. Promoting exploitation and utilization of the new energy, especially, how to high efficient utilization of the existing energy structure system become people attention and research hotspot for this reason, A new development potential energy storage invert system proposed in the paper, which is battery energy storage. This paper is devoted to the study of the main circuit and control circuit of this system.This article discusses the load features of Household electrical Appliances, which is diversity and varied irregularly. The voltage-current instantaneous control technique was used to in this paper. Under varies load conditions, output voltage waveform has good sinusoidal, which are widely used in the engineering. PID control algorithm which has been widely in engineering used for improving both the dynamic performance and the stability of the system, and analyzed by computer simulation which determination of system parameters.This paper presented a comparison study of inverter system with filtering capacitor-current feedback or filtering inductor-current feedback inner loop, output voltage outer loop feedback. The system characteristic with SPWM instantaneous control was obtained. At the same time, building of simulation model and simulation study for two control schemes. The simulation results show, the strategy of SPWM instantaneous control with capacitor-current feedback has the advantages of good sinusoidal output waveform, fast dynamic response, tough external characteristic output voltage, high precision of output voltage and ability to adapt nonlinear load, etc.A novel bias magnetic control scheme for AC power supplies is proposed. The proposed bias magnetic control scheme is based on high pass filter inserted in the forward path and feed forward control. Without detecting bias magnetic of transformer, this scheme can eliminate bias magnetic of transformer caused by dc component in the reference or feedback signal, and the inconsistent of dead time, etc. The proposed method has the following advantages: no sensors are used; it is simple to design and implement, and it is suitable for various power applications. According to out SPWM waveform characteristics of inverter, the discuss on the design method of a DC-AC converter. The point that the transformer of AC power supplies is easy to be in saturation condition is considered when selecting parameters. The output waveform of inerter system must be sine wave. so invert LC filter can reach the goal a parameter design method for LC filter is also proposed, the parameter of LC filter can be calculated precisely to meet the main technical specifications. With this method, not only the THD specification of LC filter can be met, and the no load input current specification of LC filter can be met, ensuring the stability of the inverter when load is changed and perfect harmonious component of output waveform of voltage.Finally, aimed at single-phase 10kW, 220v/50Hz household used storage inverter system, and detailed design of its main circuit and the hardware of control circuit, given the parameter of dc-ac converter and LC filter.