摘要
提出改进潮流计算方法,将各分布式电源视为松弛节点,免去系统平衡节点的设定,考虑了孤岛运行的微电网三相对称及不对称潮流的情况。采用牛顿迭代法,以与IEEE-5节点系统相同网络结构的微电网为例,将之与传统潮流计算进行对比。算例分析了含有不同分布式电源的发电系统及其有功/无功调节能力、不同负荷模型等情况。该方法物理意义明确,计算简单,计算潮流的同时反映系统频率的变化,较传统潮流计算方法更适于孤岛运行的微电网潮流计算。
The paper proposes a new power flow calculation method which takes each distributed power as slack node, avoids the set of system balance node, and considers the situation of three-phase symmetric/asymmetric current in islanding micro grid. Based on Newton-Raphson iteration, taking the micro grid which has the same net structure as IEEE-5 node system as an example, the new algorithm is compared with the traditional one through analyzing different DG systems with various distributed powers as well as their active/reactive adjustment capability and different load models. The results show that the new algorithm is easy to use, has clear physical meaning, can reflect the change of system frequency as calculating the power flow, and is more suitable for power flow calculation of islanding micro grid than the traditional one.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第23期16-20,共5页
Power System Protection and Control
关键词
电力系统
潮流计算
微电网
分布式发电
孤岛运行
power system
power flow calculation
micro grid
distributed generation
islanding
