直流跨区互联电网发输电计划模型与方法  

Model and Methods of Generation and Transmission Scheduling of Inter-regional Power Grid via HVDC Tie-line

作　　者：王斌[1,2,3] 夏叶[1,2] 夏清[1,2] 张慧玲[4] 韩红卫[4] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京市100084 [2]电力系统及发电设备控制和仿真国家重点实验室,北京市100084 [3]国家电力调度控制中心,北京市100031 [4]国网宁夏电力公司电力调度控制中心,宁夏回族自治区银川市750001

出　　处：《电力系统自动化》2016年第3期8-13,26,共7页Automation of Electric Power Systems

基　　金：国家科技支撑计划资助项目(2013BAA01B02);国家电网公司科技项目(5229NX15002B)~~

摘　　要：直流跨区输电为大范围资源优化配置和清洁能源跨区消纳提供了高效的物理平台。充分利用区域间电源结构互济、负荷特性互补的优势,可以有效挖掘电力资源跨区协调优化潜力、提升电网清洁能源消纳能力。为此,文中在兼顾现有国(分)、省两级调度模式的基础上,提出了以直流联络线功率为协调变量,区内优化、跨区协调的直流跨区互联电网发输电计划模式;建立了考虑直流调整灵活性、直流联络线日交易电量、联络线运行功率曲线阶梯化等实际运行要求的发输电计划模型;提出了以直流功率为引导变量的跨区边际机组识别方法,解决了上述大规模混合整数规划模型的求解效率问题。基于省网实际负荷曲线进行算例分析,验证了所提模式、模型、方法的有效性。A highly efficient physical platform is provided by inter-regional high voltage direct current（HVDC）tie-line for large-range cross-region clean energy accommodation and resources allocation.The cross-regional coordinative optimization potential of power resources can be tapped and the accommodation capability of clean energy improved if complementary characteristics of power supply structure and system load of each region are well utilized.To this end,ageneration and transmission scheduling mode of inter-regional power grid via HVDC tie-line is proposed based on the two-levelstateprovince＂system operation pattern.In this mode,the transmission power of HVDC tie-line is viewed as cross-regional coordinative variable while generator scheduling is optimized inside each region.A mathematical model of generation and transmission scheduling mode of inter-regional power grid via HVDC tie-line is developed with various practical operation constraints taken into account,including the HVDC flexible adjustment constraints,tie-line daily transaction energy limit and tie-line power profile stair-like requirement.An inter-regional marginal-units-identification method guided by HVDC tie-line power is addressed to enhance the solving efficiency of the proposed largescale mixed integer programming model.A case study is conducted using the real world load profile of a provincial power grid to validate the effectiveness of the proposed mode,model and method.

关 键 词：高压直流输电 跨区互联电网 发输电计划 协调优化 可再生能源消纳 

分 类 号：TM73[电气工程—电力系统及自动化]