考虑暂态稳定约束的最大输电能力计算

Calculation of Total Transfer Capability Considering Transient Security Constraints

基于最优潮流技术和稳定性量化分析理论的扩展等面积准则(EEAC),提出了在预想故障集下求解互联电力系统暂态稳定约束下的最大输电能力计算方法。基于最优潮流技术建立了最大输电能力的数学模型,采用EEAC量化分析算法获取预想故障集的暂态稳定裕度,针对不安全的预想故障,采用基于安全稳定模式的预防控制技术将非线性的暂态稳定约束转化成临界群机组出力的线性约束,并最终通过内点算法求解。广东电网仿真算例验证了算法的有效性和实用性。

Based on extended equal area criterion （ EEAC ） with optimal power flow and the quantitative analysis theory of pow-er system stability, a new method is presented for implementing transient stability constrained total transfer capability （TTC）. The mathematic model of TTC is established based on optimal power flow （ OPF）. According to stability margins calculated by EEAC, the harmful contingencies are identified. Based the preventive control calculation results, the transient stability con-straints are converted into inequality constraints of control variables which are incorporated into OPF model. TTC is finally solved by modern interior point method. The effectiveness of the new method is verified by the simulation results using the data of Guangdong power system.