基于受控微分—代数系统灵敏度分析的紧急控制

基于时域仿真得到的系统受扰轨迹给出了暂稳紧急控制的非线性规划模型，该模型采用一种启发式的功角积分型指标构成稳定约束。通过引入受控非线性微分-代数系统灵敏度分析求出所定义的功角积分型指标对控制变量的梯度后，给出了所建立的暂稳紧急控制非线性规划模型的2种求解方法：近似规划算法和拟贪婪算法。所提出的暂稳紧急控制模型与时域仿真具有同等的模型适应性。对多机系统切机／切负荷暂稳紧急控制的数值仿真表明，该方法是有效的。

EMERGENCY CONTROL BASED ON SENSITIVITY ANALYSIS OF CONTROLLED DIFFERENTIAL-ALGEBRAIC SYSTEMS

The nonlinear programming model for transient stability emergency control is presented based on disturbed trajectories acquired by time domain transient simulations. The stability constraint of this model is founded by a heuristic kind of power angle integration index (PAII). After the gradient of PAII to control variables is acquired through sensitivity analysis of a controlled nonlinear differential-algebraic system, two methods for solving the transient stability emergency control model, namely approximated programming algorithm and pseudo-greedy algorithm, are presented. The transient stability emergency control model has the same adaptability to power system mathematical models as time domain simulation. Simulation in a multi-machine power system demonstrates that the proposed scheme for transient emergency control is effective.