含海水淡化系统的海岛微电网经济运行优化

针对海岛供电供水困难的现状,将海水淡化系统引入到微电网中,解决海岛居民的水电供应问题。针对微电网经济运行优化算法容易陷入局部最优的问题,将遗传算法中的小生境种群策略引入粒子群算法中,提出了一种改进小生境粒子群算法,对学习因子进行异步变化调整,对惯性权重进行指数递减,改善了算法寻优性能。以考虑海水淡化经济收益的孤立微电网系统经济运行成本最低为目标,建立数学优化模型,以改进算法进行优化计算,分别与标准粒子群算法计算结果以及不考虑海水淡化系统的微电网经济运行优化结果进行对比,验证了引入海水淡化系统可提高系统的经济性,所提改进算法具有良好的寻优能力。

Economic operation optimizationof island microgrid with seawater desalination system

Aiming at the difficulty of island power supply and water supply, combining seawater desalination system with micro-grid system, based on the principle of priority utilization of wind power and photovoltaic power generation and participation of battery and diesel engine in dispatching, an optimal economic operation scheme of island micro-grid containing seawater desalination is proposed.To solve the problem that the economic operation optimization algorithm of micro grid is prone to fall into the local optimal and difficult to get the lowest operation cost, an improved niche particle swarm optimization algorithm is proposed, which makes asynchronous change adjustment of learning factor and exponential decline of inertia weight, improving the optimization performance of the algorithm in the optimization process.To consider economic returns of desalination isolated micro power system economic operation cost minimum as the objective, optimization mathematical model is set up, and to improve the niche optimization calculation of particle swarm optimization, and does not consider water desalination system of micro grid economic operation optimization result is compared, the results show that the introduction of the seawater desalination system, improve the economic benefit of the system is also verified the proposed improved niche particle swarm algorithm has good optimization ability.