考虑等效阻抗关联模型的新能源双环网负荷极限评估  

New energy double loop network load limit assessment considering equivalent impedance correlation model

作　　者：刘继成 崔曦文 张运厚 李岩春 吴昊[3] Liu Jicheng;Cui Xiwen;Zhang Yunhou;Li Yanchun;Wu Hao(Northeast Branch of State Grid Corporation of China,Shenyang 110000,China;Beijing Kedong Electric Power Control System Co.,Ltd.,Beijing 100192,China;Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]国家电网有限公司东北分部,辽宁沈阳110000 [2]北京科东电力控制系统有限责任公司,北京100192 [3]太原理工大学,山西太原030024

出　　处：《可再生能源》2022年第1期116-121,共6页Renewable Energy Resources

基　　金：国家电网有限公司东北分部科技项目(SGDB0000GHJS2000320)。

摘　　要：针对含高比例新能源发电的双环网网络功率不确定性、阻抗参数差异较大,难以准确评估负荷可调节极限的问题,提出考虑等效阻抗关联模型的新能源双环网负荷极限评估模型。首先,基于戴维南等效电路方法,建立含新能源的双环网戴维南等值电势和等效关联阻抗模型;其次,考虑环网之间的阻抗关联关系,引入图论理论建立新能源双环网的有向图模型。为准确评估双环网负荷极限,提出一种分布式路由算法进行负荷极限量化,并考虑新能源出力的不确定性与节点电压稳定性,提出一种改进的分布式路由算法对模型进行求解。最后以某地新能源双环网进行算例仿真,算例结果表明,所提模型可以实现新能源双环网负荷极限优化,进而提高电网调节能力。Aiming at the problem that the power uncertainty of the dual-loop network with a high proportion of new energy generation and the large difference in impedance parameters make it difficult to accurately evaluate the load limit, a new energy dual-loop network load limit evaluation model considering the equivalent impedance correlation model is proposed. First, based on Thevenin equivalent circuit method, the Thevenin equivalent potential and equivalent associated impedance model of the double loop network containing new energy is established.Secondly, considering the impedance correlation between the ring networks, the graph theory is introduced to establish a directed graph model of the new energy double ring network. In order to accurately assess the load limit of the dual-loop network, a distributed routing algorithm is proposed to quantify the load limit, and considering the uncertainty of new energy output, an improved distributed routing algorithm is proposed. Finally, a new energy double-loop network in a certain area is used to simulate a calculation example. The results of the calculation example show that the proposed model can realize the load limit optimization of the new energy double-loop network, thereby improving the power grid regulation ability.

关 键 词：可再生能源 双环网 负荷极限 阻抗关联 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程] TK51