摘要
海岛和偏远地区远离大电网,但可再生能源丰富,采用含风力、光伏等可再生能源的独立微电网供电是解决其电力紧缺的重要手段。为了充分利用可再生能源及更好地满足海岛和偏远地区电力用户需求,提出独立风/光/储微电网电源容量配置的多目标优化模型,该模型以电源总成本、负荷缺电率、电能浪费率、风/光输出功率波动率4个指标最小为目标函数,并采用具有自适应交叉和变异操作的改进遗传算法进行求解。对某海岛独立微电网,考虑了单峰和多峰2种日负荷特性校验所提出模型和方法的有效性。仿真结果表明:采用该方法可获得多个可行优化方案,便于决策者根据实际规划目标需要进行选择;当负荷缺电率降低时,电源总成本、能量浪费倍率和风/光输出功率波动率均增大;在负荷缺电率相同的情况下,用该方法获得的方案在电能浪费率和风/光输出功率波动率方面均优于HOMER软件配置方案。
Usually, islands and remote areas are far away from the power grid, but are rich in renewable energy. Therefore, it is an important means to adopt isolated microgrids with renewable energy resources including wind power and PV to solve the power shortage problem for these districts. In order to make full use of the renewable energy resources and better meet and demand of power consumers on islands and in remote areas, a multi-objective model that optimizes the capacity of standalone wind/PV/storage hybrid microgrid is presented, which takes the minimums of the equipment investment cost, the loss of power supply probability（LPSP）, the electrical energy waste rate（EEWR） and the wind and photovoltaic power volatility（WPPV） as objective functions. The optimal model is solved by the improved genetic algorithm with self-adaptive crossover and mutation operation. To validate the proposed model and method, an island＇s microgrid is used as an example, considering single peak and multi-peaks daily load characteristic respectively. The simulation results show that multiple feasible schemes can be obtained by the proposed method, and it is convenient for microgrid planner to select the optimal solution according to the practical requirements; when the value of the LPSP decreases, the equipment investment cost, the EEWR and the WPPV increase; and under the same value of the LPSP, the scheme obtained by the proposed method is better than the one obtained by HOMER software.
出处
《智能电网》
2016年第8期802-810,共9页
Smart Grid
关键词
微电网
风光互补
容量优化配置
供电可靠性
独立运行
microgrid
wind and solar complementation
optimal capacity configuration
reliability of power supply
standalone operation
