Research And Design On Grid-connected And Stand-alone Hybrid Photovoltaic Application

Because of Grid-connected system and Stand-alone Hybrid system is insufficient. To improveof the utilization rate of solar array on the complex operating conditions. This article system elaborated a hybrid application of solar photovoltaic power generation system, Stand-alone Hybrid blending photovoltaic system. In this paper, the author divided this article Into two parts to the system, Stand-aloneHybrid systemand,Grid-connected system.Especially focusing on their respective operation mode and control technique.The first part of the Stand-alone Hybrid system is actually a DC/DC link step-down circuit. First this chapter introduces the basic knowledge of the BUCK circuit. To the stability of the output voltage of BUCK circuit must control the given signal and restrain disturbance signal.In this paper, the BUCK circuit modeling is analysised, and the control method based on the three compensation network is adopted to control the output voltage. Using MATLAB simulation tools to verify when the BUCK circuit Disturbance when the system can automatically correct voltage output to reach steady state.The second part of the Grid-connected system.First in this chapter we describes the the basic form of inverse alternating circuit and the basic structure of the inverter system and the basic control method of inverter circuit. Because of PWM technology is suitable for analog circuit, incommensurate with today’s high speed development of computer information technology, so we need a new kind of control technology to solve the problem. SVPWM technology was born. Next this article expounds this paper systems introduces the voltage space vector pulse width modulation (SVPWM) technology development situation, the foundation of the theory of SVPWM technology。As a principle. Next the author has carried on the inverter circuit model based on SVPWM control. Through the MATLAB simulation tools for the experiment and simulation results are effect.