基于风光互补电力入网的电力系统动态经济调度

摘要

To solve the impact of uncertainty of hybrid wind and solar power connected to grid on power grid scheduling,an economic dispatch is studied in this paper.A penalty cost of environmental pollution is introduced into according to the emission characteristics of thermal power units,a penalty cost of spare capacity caused by intermittent electricity output volatility of hybrid wind and solar power system is introduced into also.Based on constraints such as unit ramp rate and balance between supply and demand of the system,a scheduling policy is given for connecting hybrid wind and solar power to grid,a dynamic economic dispatch model containing hybrid wind and solar power is established and the proposed model is solved by an improved particle swarm algorithm.Finally,IEEE-30 bus test system is taken as an example for simulation analysis,simulation results verify effectiveness and reasonableness of the proposed model and algorithms,the results show that connection to the grid of hybrid wind and solar power can restrain fluctuations of wind power output,and rate of hybrid wind and solar power connection to the grid has been increased on the basis of ensuring system reliability requirement.%为解决风光互补电力入网的不确定性给电网调度带来的影响,文章对其的经济调度问题进行研究.针对火电机组的排污特性引入了环境污染惩罚成本,针对风光电力输出功率的间歇波动性引入了备用容量惩罚成本,在考虑系统供需平衡与机组爬坡率等约束条件的基础上,给出了风光电力互补入网的调度策略,建立了含有风光互补电力的动态经济调度模型;应用一种改进的粒子群算法对所提模型进行求解.最后以IEEE-30节点测试系统为例进行仿真分析,仿真结果验证了所提模型的合理性及算法的有效性,同时也说明了风光互补电力入网能够平抑风电的出力波动,可以在保证系统可靠性的基础上,提高风光电力的并网率.