最优化潮流计算的多小水电地区电网经济运行方案  

Schematic Studies of Grid Economy Operation for Region with Many Small Hydropower Based on Optimal Power Flow Calculation

作　　者：陈思明 Chen Siming(Yunnan Power Grid Co Kunming Power Supply Bureau,Ltd.,Kunming,650000)

机构地区：[1]云南电网有限责任公司昆明供电局

出　　处：《云南电力技术》2019年第5期43-47,共5页Yunnan Electric Power

摘　　要：小水电地区电网潮流变化复杂,电网网损的波动受小水电出力的变化而变化,以某地区电网为例,首先分析了多小水电地区电网的运行特征和小水电出力特征。以网损最小为优化目标,采用遗传算法求解最优潮流问题,提出了针对不同电网结构和运行方式下,调整电网有功潮流、变电站主变投退和小水电无功出力的优化方案。最后,对变压器参数不匹配、35 kV母线电压不平衡、用户侧无功补偿容量不足等异常网损的机理进行了分析,并提出了相应的改善措施,为多小水电地区电网制定以实现网损最优为目的的运行方案提供理论依据。Power grid loss varies with the output fluctuation of small hydropower,because of complexity of power flow in the area with many small hydroelectric generating sets.The article takes a certain region power grid for example,analyzes operating characteristic and small hydropower output feature for region with many small hydroelectric generating sets firstly.With the goal of minimizing power grid loss,using genetic algorithm calculate optimal power flow,the article put forward optimization plan adjusting power grid effective power flow、transformer substation main transformer input and output operation、small hydropower reactive power output operation,for different electric power network compositions and mode of operations.At last,mechanism of abnormal network loss which contain transformer parameters mismatching、35 kV bus voltage unbalance、lack of reactive power compensation in consumer side are analyzed,and improves measures are put forward,assist regional power grid with many small hydropower to provide scientific basis establishing operation scheme to achieve the goal of electric network loss minimize.

关 键 词：小水电 网损 最优潮流 经济运行 运行方式 主变 无功潮流 功率因数 无功补偿 

分 类 号：TM74[电气工程—电力系统及自动化]