考虑动态功率调节裕度的高比例风电系统水-火-荷分布鲁棒优化调度  

Distributionally robust optimal dispatching of hydro-thermal-load resources for high penetration of wind system with dynamic power regulation margin

作　　者：杨洪明 刘俊鹏 梁芮 廖圣桃 YANG Hongming;LIU Junpeng;LIANG Rui;LIAO Shengtao(International Joint Laboratory of Minis try of Education for Operation and Planning of Energy Internet Based on Distributed Pho-tovoltaic Storage Energy,Hunan Provincial Engineering Research Center for Electric Transportation and Smart Distribution Network,School of Elec trical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China;Huizhou Boluo Power Supply Bureau of Guangdong Power Grid Co.,Ltd,Huizhou 516008,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南省“电动交通与智能配网”工程技术研究中心,教育部“基于分布式光储的能源互联网运行与规划”国际合作联合实验室,长沙410114 [2]广东电网有限责任公司惠州博罗供电局,惠州516008

出　　处：《系统工程理论与实践》2021年第9期2327-2337,共11页Systems Engineering-Theory & Practice

基　　金：国家自然科学基金重点资助项目(71931003,72061147004);湖南省科技厅研究项目(2019WK2011,2019GK5015)。

摘　　要：具有随机性、波动性的风电大规模接入给电网安全调度带来严峻挑战.针对风电反调峰性和不确定性,本文提出考虑动态功率调节裕度的水-火-荷分布鲁棒优化调度方法.首先,针对风电和负荷双重不确定的概率分布难以准确估计的特点,提出净负荷(风电与负荷功率之差)波动速率矩不确定集合刻画系统功率变化的随机性,并结合水、火、荷的功率调节特性,建立系统动态功率调节裕度模型.其次,借助分布鲁棒条件风险价值具有描述尾部概率的良好特性,刻画恶劣风况下系统由于功率调节裕度不足所造成的弃风风险.以系统运行成本和弃风风险成本最小、系统总动态功率调节裕度最大为目标,提出高比例风电消纳的分布鲁棒优化调度模型.通过对偶优化理论将模型转化为易求解的半定规划问题进行计算.所提出的模型可有效提高风电消纳量,保证经济运行的同时,提高了应对净负荷不确定波动的能力.The high penetration of wind power generation poses a great challenge to the power system safety dispatching since they’re highly volatile and intermittent.In view of the anti-peak regulation characteristics and uncertainty of wind power,a distributional robust optimal dispatching method of hydro-thermal-load resources for high penetration of wind system with dynamic power regulation margin is proposed in this paper.Firstly,the moment uncertainty set of net load(the difference between wind power and load power) fluctuation rate is proposed to describe the randomness of system power change.Then,the dynamic power regulation margin model of the system is established considering the regulation ability of hydropower,thermal power and load power.Secondly,by means of the distributionally robust conditional value at risk(DR-CVaR) which can describe tail probability well,the risk of wind abandonment caused by the insufficient power regulation margin of the system under severe wind conditions is presented.A distributional robust optimal dispatching model is established to minimize the system operating costs,risk costs of wind abandonment and maximize the total dynamic regulation margin.The model is transformed into a semidefinite programming problem by dual optimization theory.The proposed method can effectively improve the permeation level of wind power,ensure economic operation and improve the ability to response the uncertain fluctuations of net load.

关 键 词：高比例风电系统 动态功率调节裕度 分布鲁棒优化 条件风险价值 

分 类 号：TM732[电气工程—电力系统及自动化]