Research On Control Strategy Of Distributed DC Power Supply System

With the increasingly high demand for power quality and capacity, more and more shortcomings have exposed in centralized power supply system. As follows:1. Inadequate supply of electricity;2. Lack of the ability of load regulation;3. Lack of the ability of anti-jamming and failure. The DC power supply system has been for a long time in some special occasions such as Aircraft, ships and so on. With the continued development of the renewable energy, gradually pay attention to it and the DC distributed power supply system has gradually been paid attention. Distributed DC power supply system has not only overcome the shortcomings of the traditional centralized power that it was difficult to achieve a redundant power supply and uninterruptible power supply, but also it was high reliable to achieve expansion in high degree modular system. However, there were a number of discrete powers in distributed power supply system and all of them must join in cooperation, it was a primary problem to be solved in the research of the control strategy of distributed DC power supply system.Connected directly network between the photovoltaic panel’s module and battery modules in Multi-Agent control system based on problems above in this paper. In the case of power generation information exchange, two local control loop were dynamically linked through the data link functions to coordinate and control in quasi-real-time mode so that the power can be keep balance or match. The main work in this paper based on this is as follows:1. Analyze and compare with the control strategies in distributed DC power supply system.2. Study the characteristic of the input source and mathematic model in the system3. Analyze the operation of distributed DC power supply system and power regulation algorithm of the chain of photovoltaic-based wireless data-battery.4. Complete the design of hardware and software in system and achieve the design of duplex buck circuit and control circuit and the hardware design of Zigbee wireless data transmission module based on CC2430chip.5. Realize the Wireless data link system, the digital control loop of digital signal controller MS320F2812and power adjustment algorithm to prove the control strategy of distributed DC power system in experiement under the reasonable condition.