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

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,...

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

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.