摘要
在输配网全局潮流计算中,当前的需求是有效减少配网潮流计算量并保证收敛精度。对此,提出一种基于配网功率预估的输配网全局潮流计算方法。首先,建立边界点交互功率预估函数,在此基础上构建主从迭代和预估迭代交替使用的输配网潮流计算模型,通过主从迭代得到配网功率和边界点电压,求解功率预估函数参数进行预估迭代,减少了主从迭代次数。在潮流迭代的过程中不断修正预估函数,使功率预估值不断逼近真实值,保证了潮流的收敛精度。采用修正函数对配网潮流计算初值进行修正,使初值更接近真实值,减少了每次主从迭代中配网子迭代次数。仿真及其分析表明,所提方法在提高计算速度方面效果非常显著,同时计算结果具有很小的误差。
The current demand of global power flow calculation of transmission and distribution network is aiming at reducing the power flow calculation and ensuring the convergence accuracy.Therefore,a method for global power flow calculation for transmission and distribution network based on the power prediction of distribution network is proposed in this paper.Firstly,an interactive power prediction function for boundary points was built,and a power flow calculation model of transmission network which was applying the master-slave iteration and predicting iteration was established.The power of distribution network and boundary point voltage were obtained by using the master-slave iteration processing,and the parameters of power predicting function were got and applied in the predicting iteration,in this way,the master-slave iterations were reduced.The predictor function was modified continuously during the process of power flow iterations to make the estimation values of the power approach the true values,so the convergence accuracy of power flow was guaranteed.The correction function was used to revise the initial values of power flow calculation of distribution network to make it close to the true value,which helped reduce the iterations of distribution network calculation.The simulation example showed that the proposed algorithm can significantly reduce the computing time while coming out with a result of few errors.
作者
史帅彬
汪清
俞龙飞
丘国斌
曾江
Shi Shuaibin;Wang Qing;Yu Longfei;Qiu Guobin;Zeng Jiang(Shenzhen Power Supply Co.,Ltd.,Shenzhen 518001,Guangdong,China;South China University of Technology,Guangzhou 510640,China)
出处
《电测与仪表》
北大核心
2018年第18期44-49,共6页
Electrical Measurement & Instrumentation
基金
中国南方电网有限责任公司科技项目(090000KK52150070)
关键词
输配网潮流
主从分裂法
配网功率预估
配网初值修正
power flow of transmission and distribution network
master-slave splitting method
power prediction of distribution network
initial values correction of distribution network
