Research On Power Transforming System Of Tidal Plant

With the rapid development of economic,increase of population and progress of science and technology,more and more traditional energy will be on demand,under which it is more and more important to speed up the progress of new energy usage.This paper is about of a new energy——tidal energy's exploiture.There is something about research in tidal plant's power transforming and grid-connected controlling in this paper, and has presented idiographic practical scheme.In the paper, research on tidal plant's power transforming system key technology has been done all-around from theory to practice.At the same time, the digital system which has great application foreground has been analyzed at large in theory.Their organic combination has established stability theoretical foundation for the following study.This paper has researched the structure,working principle and control strategy of stand-alone tidal power system.Aiming at the characters of tidal generation electricity,DC to AC control and the battery charge control are accomplished.And Boost DC to DC circuit is simulated.The paper mainly discusses the tidal generation control system with AC to DC to AC as main circuit in detail,which implements the DC to AC control,the battery charge control and the communication with PC.The system may keep constant frequency and voltage. The consumer gets steady voltage no matter how the tide changes.The tidal plant's inverter used digital three-phase SVPWM inverter closed-loop system based on ARM.This design scheme includes the design of inverter main circuit, and the software and hardware design of inverter digital control system.The simulation and experimentation results make it clear that the system is a constant frequency and voltage system that the consumer could get steady voltage when the tide changes as designed.This paper presents SVPWM solution to the tidal generation system.I research the composing of main circuit of the tidal generation electricity system.MATLAB software imitates the scheme. During imitation, I introduce the model of every module.The result which is gained by the model proves the scheme feasible.On the design of the controller, the paper adopts the embedded microprocessor STM32F103ZE and lucubrate its hardware frame. With the need of the system, the STM32F103ZE on the connection with PWM generator may realize the control of DC-AC circuit. The STM32F103ZE has a PWM generator, which achieves the battery charge.Charge device is the core of tidal plant's power transforming system. And it is also the core of the paper. The reasonable management and control of battery is an important means of prolonging their life. At first, in this paper battery charging technology was discussed,I choose this way of the main charging before the floating charging to recharge the battery.And, charging system also has the function that the main and the floating charging convert automatically. This paper designed DC to DC convertor to recharge the battery. The simulation and experimentation results prove that the design is reasonable and feasible.