计及系统调频作用的随机潮流模型与算法  

Probabilistic Load Flow Method Considering Function of Frequency Modulation

作　　者：朱星阳 刘文霞 张建华 吴旭[2] 蒋程 邱威 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]安徽省电力公司调度通信中心,安徽省合肥市230061 [3]国家电力调度控制中心,北京市西城区100031

出　　处：《中国电机工程学报》2014年第1期168-178,共11页Proceedings of the CSEE

基　　金：国家863高技术基金项目(2012AA050201);中央高校基本科研业务费专项基金资助项目(13XS04)~~

摘　　要：为提高解析法随机潮流结果与系统实际情况的吻合程度,将动态潮流的思想引入随机潮流分析,研究计及频率调节的动态随机潮流模型与算法。结合实际运行中系统调频响应过程,采用分段函数建立动态不平衡功率分配模型;与常规随机潮流模型联合,推导得出计及调频作用的电力系统随机潮流模型;并根据机组调频能力不足对不平衡功率分配的影响,对上述模型进行修正。为保证模型求解方法的实用性,结合常规解析法和模拟法提出一种随机潮流混合求解法。该求解方法简单、易实现,相对于常规解析法系统随机性处理能力增强,相对于常规模拟法求解速度大大提高且可保证较高计算精度。以IEEE 24节点系统为例,分析验证了所提模型和方法的有效性。To improve the fitting degree between analysis results and actual situation, the idea of dynamic power flow was introduced into probabilistic load flow （PLF） analysis to research the model and algorithm of PLF considering frequency modulation. Based on processes of frequency response in real system, the analytical model of dynamic unbalance power distribution was established by use of piecewise functions. And the model was combined with traditional PLF model to establish the model of PLF considering frequency modulation. The proposed PLF model was modified according to the impact of insufficient frequency modulation on unbalance power distribution. To ensure the practicality of the model solution, a hybrid method was proposed, which is simple and easy to realize. Compared with conventional analytical method, the proposed method has more powerful capacity of random processing. Compared with conventional simulation method, the solving speed can be greatly improved while keeping higher calculation accuracy. The effectiveness of the proposed model and method was verified via IEEE 24 bus system tests.

关 键 词：随机潮流 不平衡功率 调频 解析模型 混合法 

分 类 号：TM74[电气工程—电力系统及自动化]