计及新能源出力不确定性的电气综合能源系统协同优化  

Coordinated Optimization of Integrated Electricity-Gas Energy System Considering Uncertainty of Renewable Energy Output

作　　者：王静[1] 徐箭[1] 廖思阳[1] 司马莉萍[1] 孙元章[1] 魏聪颖[1] WANG Jing;XU Jian;LIAO Siyang;SIMA Liping;SUN Yuanzhang;WEI Congying(School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China)

机构地区：[1]武汉大学电气与自动化学院

出　　处：《电力系统自动化》2019年第15期2-9,共8页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2016YFB0900100);湖北省杰出青年基金资助项目(2018CFA080);国家自然科学基金资助项目(51707136)~~

摘　　要：随着波动性强的新能源大规模接入配电网,主网下网功率波动增强,危及主网运行安全。为了有效降低新能源消纳对配电网的不利影响,建立了考虑新能源出力不确定性的电气综合能源系统协同优化模型。其中,动态场景方法被用来刻画新能源出力的不确定性,优化目标为最小化全系统运行成本和主网下网功率波动量。模型中考虑了温控负荷调节能力及配电网交流潮流和天然气网潮流等约束。利用分段线性化和二阶锥松弛方法,将模型转化为混合整数二阶锥规划问题。最后,在IEEE 33节点配电网和23节点气网构成的电气综合能源系统进行夏季和冬季算例仿真,验证了利用惯性更大的气网平抑主网下网功率波动的有效性。同时,仿真结果表明利用温控负荷调节能力可降低系统成本,且确保系统运行的安全。As the large-scale renewable energy with high volatility accessing to the distribution network,the tie-line power fluctuation of main network increases,which endangers its operation safety.In order to reduce the adverse impact of the renewable energy utilization on the distribution network,a coordinated optimization model is established for the integrated electricity-gas energy system,which takes into account the uncertainty of renewable energy output.In the model,the dynamic scenarios method is adopted to describe the uncertainty of renewable energy output,and the objective is to minimize the whole system operation costs and the tie-line power fluctuation.The model considers the regulation capability of thermostatically controlled load and AC power flow of distribution network and gas flow of gas distribution network.The piecewise linearization and second-order cone relaxation methods are used to transform the model into a mixed-integer second-order cone programming problem.Finally,the summer and winter simulation is conducted on an IEEE 33-node distribution network and a 23-node gas network.It is verified that the gas network with large inertia can be used to smooth the tie-line power fluctuation.Meanwhile,the simulation results show that the thermostatically controlled load can reduce system costs and ensure system operation safety.

关 键 词：新能源 冷热电联产系统 温控负荷 综合能源系统 协同优化 

分 类 号：TM73[电气工程—电力系统及自动化] TK01[动力工程及工程热物理]