基于系统灵活性的可再生能源接纳评估  

Assessment of Renewable Energy Accommodation Based on System Flexibility Analysis

作　　者：李则衡[1] 陈磊[2] 路晓敏[2] 张毅威[2] 徐飞[2] 严干贵[1] 齐军[3] 侯佑华[3] 王小海[3] 

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012 [2]清华大学电机工程与应用电子技术系,北京市海淀区100084 [3]内蒙古电力(集团)有限责任公司,内蒙古自治区呼和浩特市010010

出　　处：《电网技术》2017年第7期2187-2194,共8页Power System Technology

基　　金：国家科技支撑计划项目(2015BAA01B03);国家自然科学基金项目(51377002);国家电网公司科技项目(SGTJ0000KXJS1500072)~~

摘　　要：以电力电量平衡为基本条件的传统机组组合方法,通常足以应对系统中负荷功率的不确定,而对于高比例可再生能源的系统中功率的大幅度随机波动性,这种方法难以满足系统消纳可再生能源的需求,这也使得在开机方式制定过程中率先对系统可再生能源消纳能力进行评估变得尤为重要。从系统运行灵活性的视角出发,首先从功率调节范围角度对系统内各类资源所能提供的灵活性进行定量分析;然后提出了基于系统灵活性充裕度的可再生能源消纳能力评估方法;最后通过具体算例分析验证了所提方法的实用性。此外,针对自备电厂参与功率调节以及储能装置投入运行时的系统消纳能力的提升进行了讨论,并对不同可再生能源预测精度下系统的消纳能力进行了分析。Traditional methods of unit commitment based on power balance can satisfactorily deal with small system uncertainty mainly from load variation. However, with high proportion of renewable energy generation, traditional methods are difficult to meet need of renewable energy accommodation because of much severer power variation and large uncertainty in system, and assessing system capability of accommodating renewable energy becomes more and more important. Based on system flexibility analysis, this paper presents a method to assess system capability of renewable energy accommodation. Firstly, flexibility resources in system are analyzed and quantified in power regulation range. Then based on the observation that renewable energy curtailment stems from flexibility unbalance in power system, modeling of system flexibility adequacy is proposed. Finally, the method is illustrated by its application in a provincial power system to guide operators to arrange flexibility resources properly and improve system ability to accommodate renewable energy. In addition, some measures to enhance system＇s renewable energy accommodation are discussed,such as participation of selfowned-generation in power regulation and utilization of storage facilities, to further assess ability to accommodate renewable energy in different forecasting error levels.

关 键 词：高比例可再生能源系统 可再生能源消纳 开机方式 灵活性充裕度 

分 类 号：TM711[电气工程—电力系统及自动化]