电力系统惯量安全机组组合优化决策研究  

Security-constrained Unit Commitment in Low Inertia Power Systems for Resilience Enhancement

作　　者：冯俊宗 叶志祥 丁嘉熹 彭文英 吕鹏程 王逸飞 FENG Jun-zong;YE Zhi-xiang;DING Jia-xi;PENG Wen-ying;Lü Peng-cheng;WANG Yi-fei(Baoshan Power Supply Bureau of Yunnan Power Grid Co,Ltd.,Baoshan 678000,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]云南电网有限责任公司保山供电局,云南保山678000 [2]东南大学电气工程学院,南京210096

出　　处：《哈尔滨理工大学学报》2022年第5期122-129,共8页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(52007032);江苏省自然科学基金(BK20200385).

摘　　要：针对“双碳”目标下新能源大量并网,电力系统同步惯量逐步下降,连锁故障风险愈发上升的问题。综合考虑由新能源发电占比增加带来的电力系统惯量下降以及电力系统连锁故障预防,添加了系统运行约束中的受系统惯量影响的频率安全约束,并引入了运行目标中反映连锁故障风险的潮流熵,最终形成面向连锁故障预防的电力系统惯量安全运行决策模型与求解方法。对IEEE-30系统系统仿真结果表明,潮流熵和惯量安全约束的引入可以实现在牺牲一部分经济运行的基础上显著改善系统潮流分布,降低连锁故障风险,保障系统事故后的电网频率安全和负荷需求。Due to the increasing penetration of renewable energy,the power inertia will keep decreasing in the future.To deal with the decreasing of power system inertia and prevent cascading failure,the frequency dynamics constraints are modeled considering frequency nadir and rate of change of frequency.The frequency constraints are added into security-constrained unit commitment(SCUC).The power flow entropy is added into the objective of SCUC.The case studies in IEEE 30-bus system shows that the introduction of power flow entropy and frequency dynamics will improve power flow distribution and lower cascading failure risk at small cost.The frequency security and load demand can be satisfied with the proposed model.

关 键 词：电力系统频率 系统惯量 电力系统弹性 安全约束机组组合 电力系统安全 

分 类 号：TM711[电气工程—电力系统及自动化]