基于模糊区间算法的多能耦合系统电能流潮流计算

Power Flow Calculation of Multi-Energy Coupling System Based on Fuzzy Interval Algorithm

传统的电能流潮流计算方法往往无法有效处理多能量源之间的复杂耦合关系。为此,研究基于模糊区间算法的多能耦合系统电能流潮流计算方法。基于电热耦合理论,构建以电力、热力系统以及电联产机组等耦合单元为主的电热耦合系统电能流潮流模型,合理定义耦合系统各不确定性状态变量区间范围,并利用模糊数理论,梯形模糊化耦合系统各状态变量区间,通过双层抽样法,完成电热耦合系统电能流潮流模型求解工作,获取系统各状态变量模糊区间解。实验结果表明:所提方法可准确获取多能耦合系统各状态变量模糊区间解;当电热负荷扰动较大时,热网管道流量模糊区间上下限波动较为剧烈,会增加热网流量越限的风险。

Traditional power flow calculation methods are often unable to effectively deal with the complex coupling relationship between multiple energy sources.For this reason,the power flow calculation method of multi-energy coupling system based on fuzzy interval algorithm is studied.Based on the electrothermal coupling theory,the electric power flow model of the electrothermal coupling system with coupling units such as electric power,thermal system and electric cogeneration unit is constructed,and the interval range of uncertain state variables of the coupling system is reasonably defined.The interval of each state variable of the coupling system is trapezoidal by using the fuzzy number theory.The power flow model of electrothermically coupled system is solved,and the fuzzy interval solution of each state variable is obtained.The experimental results show that the proposed method can accurately obtain the fuzzy interval solutions of the state variables of the multi-energy coupling system.When the disturbance of electric heating load is large,the upper and lower limits of the fuzzy range of the heat network pipe flow fluctuate violently,which will increase the risk of the heat network flow exceeding the limit.