基于交直流混联系统静态安全域安全校正控制后的优化调度  

Optimal dispatch after security correction control based on steady-state security region of AC/DC hybrid system

作　　者：陈中[1,2] 朱政光 严俊 路晨[1,2] CHEN Zhong;ZHU Zhengguang;YAN Jun;LU Chen(School of Electrical Engineering,Southeast University,Nanjing 210096,China;Jiangsu Key Laboratory of Smart Grid Technology and Equipment,Nanjing 210096,China;State Grid Jiangsu Electric Power Engineering Consulting Co.,Ltd.,Nanjing 210024,China)

机构地区：[1]东南大学电气工程学院,江苏南京210096 [2]江苏省智能电网技术与装备重点实验室,江苏南京210096 [3]国网江苏省电力工程咨询有限公司,江苏南京210024

出　　处：《电力自动化设备》2021年第4期139-147,169,共10页Electric Power Automation Equipment

基　　金：国家重点研发计划项目(2016YFB0900602);国家电网公司科技项目(52094017000W)。

摘　　要：大型交直流混联系统安全校正控制往往会使系统处于临界安全状态,故迫切需要研究其安全校正控制后的优化调度策略。对此,基于静态安全域理论,建立了计及重载线路N-1故障约束的静态安全域数学模型,并给出了其优化调度安全子域的刻画方法。综合系统的发电成本、电压偏差及安全裕度表征优化调度模型的经济性与安全性。通过计算安全距离灵敏度,确定对关键断面影响显著的敏感机组和直流线路,并在不同安全裕度约束下刻画各维度的安全子域投影,为优化调度提供更丰富和准确的运行信息与引导策略。算例分析表明优化调度安全子域可有效提升系统运行的经济性与有效性,并合理规避了重载线路N-1故障对系统安全运行的冲击。The security correction control of large-scale AC/DC hybrid system often results in system located in a critical security state.Therefore,it is urgent to study the optimal dispatch strategy of AC/DC hybrid system after security correction control.Based on the steady-state security region theory,a mathematical model of steady-state security region considering N-1 fault constrain is built,and its depicting method of optimal dispatch security sub-region is given.The economics and security of the optimal dispatch model are comprehensively evaluated with the system generation cost,voltage deviation and security margin.By calculating the security distance sensitivity,the sensitive generators and DC lines that have a significant effect on the crucial section are determined,and the security sub-region projections of different dimensions are depicted under the constraints of different security margin,providing richer and more accurate operation information and strategic guidance for optimal dispatch.The analysis of cases shows that the optimal dispatch security sub-region can improve the economics and effectiveness of the system,avoiding the impact of N-1 fault of heavy load line on the secure operation of the system.

关 键 词：交直流混联系统 静态安全域 安全距离灵敏度 重载线路N-1故障 优化调度 

分 类 号：TM734[电气工程—电力系统及自动化]