Research Network Technology And Power Generation Systems Scenery

Sustainable development of solar and wind energy resources has attractedattention from various countries. States unveiled new energy laws to play a role infueling the solar and wind energy development. Among them, the wind/photovoltaichydrid power grid system has a far-reaching theoretical and practical significance. Inthe past five years, the total installed photovoltaic power plant has reachedthousands of megawatts. The grid-connected inverter connected thewind/photovoltaic hydrid power generation system and the power grid is the core ofthe entire PV grid power generation system. The design of the control system for thegrid-connected inverter directly affects the performance of the entire system.According to the structure of the inverter and the wind/photovoltaic hydridpower grid system characteristics, the paper studies the inverter control strategy. Thearticle controls the output current. According to the disadvantage of the sinusoidalpulse width modulation, the article proposes the space vector pulse widthmodulation method of the inverter control to improve the utilization of DC voltageand reduce harmonics. The paper analyzes and deduces the basic principles of spacevoltage vector pulse width modulation (SVPWM).Based on the control principle ofSVPWM, complete the control system hardware design and software implementation.The hardware consists of mains detection circuit, protection circuit, control circuit,driver circuit, inverter circuit and so on. The results show that the output current andgrid voltage remains the same frequency and phase, thus proving the feasibility ofthe control algorithm. The paper provided a design reference for the similar structureof photovoltaic grid-connected inverter.