Msp430 Dynamic Reactive Power Compensation Controller Based Research

With the development of technology, more and more products come into being, people increasingly rely on electric energy. The demand for electrical energy is increasing, but the energy on earth is limited, energy conservation has become a global topic. Power is China's major secondary energy, in the power system, the use of a large number of non-linear load reactive power loads make large-scale fluctuations, it wastes a lot of electrical energy, compensating reactive power and improving the power factor have become the first issue to be resolved of the entire power industry. Through market researching, the existed reactive power compensations have a defect that they are too expensive,their accuracy can not meet the requirements and their useful time is short, what greatly affecting their universal use. In this context, this paper has designed a dynamic reactive power compensation controller based by the concept of low-cost and high-precision, this device will help develop the universal use of the reactive power compensation controller, greatly reducing the power loss.The core component of the dynamic reactive compensation controller is MSP430FG4618, around it various ancillary parts have be designed, including network parameter measurement part, switching part, communication part, etc.. This paper designs detailed circuit diagram and flow chart, and finishes the design and realization of hardware and software. Finally, the paper completes the system on-line debugging and results analysis, the results show that the system is operating well, the measurement accuracy meets the design requirements.For the design goal of low-cost and high-precision, this paper makes improvements to the existed technology. This paper adopts the co-design of software and hardware, reducing focus on software design, especially on the formulation of control strategy and algorithm choice. In the formulation of strategies, this paper adds the setting of△U and△Q on the basis of traditional nine-district. In addition, through harmonic calculation, this paper sets voltage and current distortion threshold, pre-hierarchical switching the capacitors, solving the problem of reducing the equipments useful time by earlier reactive power compensation controllers 'neglect of properties and harmonic peak load.In order to improve the measurement accuracy and ensure the accuracy of control, in the algorithm, this paper uses a real-sequence FFT algorithm, it uses Timer_A to track and capture cycle and calculates and compensates the phase by software design. Through this design, the system can complete data collection, computing, controlling in one cycle, reaction speed,measurement and control accuracy have been greatly enhanced. Through field experiments, the results show that the design of the hardware and software is reasonable, its performance is stable, it meets the expected design requirements.