Integrated Control Of Load Power Tracking And Battery Charging For Stand-alone Small Scale Wind Power Generating Systems

Both wind energy and load power have the properties of randomness and uncertainty. The integrated control of load power tracking and battery charging proposed in the paper is not only helpful for stand-alone small scale wind power generating systems to operate in both optimal and reliable conditions, but also of theoretical importance and practical value in research and application of small scale wind power generating systems.The development situation of wind power generation and its control technology are summarized, and the basic configuration and working principle of small scale wind power generating systems or operation principle of wind turbines, generator and battery etc are discussed in this paper. The architecture of small scale wind power generating systems which is composed of rectifying bridge and buck chopper is put forward by analyzing the existing architecture. It is avail to implement integrated control of load power tracking and battery charging, and has simple structure and high reliability. Based on the state analysis of wind turbines, load power and battery, the working modes of the integrated control systems are extracted. Working modes of the systems are determined by DC voltage and current based measurement, and their transfer diagrams are given. The control strategies in the working modes of integrated control systems, which consist of maximum power, load power tracking or charging and discharging, running protection, are given. The 80C196KC based system hardware circuit is designed, and control software flowcharts are given.