TCSC与水轮发电机励磁和水门的多指标非线性协调控制

采用多指标非线性控制设计方法，对TCSC与水轮发电机的励磁和水门进行了协调控制设计。设计过程表明：多指标非线性设计方法能较好地解决多输入多输出高阶非线性控制系统的设计问题，并且对于具有非最小相位环节的水轮发电机非线性控制系统也能有效地解决其设计问题。文中所设计的多指标非线性协调控制律能有效地协调系统各状态量的动、静态性能，既提高了系统的稳定运行能力，改善了系统各状态量的动态响应特性，又能很好地保证机端电压、有功输出和TCSC阻抗这些反应系统输出特性状态量的控制精度。仿真结果表明：TCSC与发电机进行协调控制，有利于提高系统的稳定运行能力，因此，在一次系统电气特性允许的情况下，应考虑将TCSC的安装地点尽量选择在靠近发电厂一侧，以便实施TCSC与发电机的协调控制。

MULTI-INDEX NONLINEAR COORDINATED CONTROL FOR TCSC AND HYDROTURBINE GENERATOR EXCITATION AND GOVERNOR

A multi-index nonlinear coordinated control scheme for TCSC and hydroturbine generator excitation and governor is proposed. The design processes show that the multi-index control design method is effective for solving the control problems of high order MIMO nonlinear control systems, and it is also effective for solving the control problems of the nonminimum phase nonlinear control systems such as hydroturbine generator sets. The proposed multi-index nonlinear coordinated controller can effectively coordinate the dynamic and steady-state performances of the controlled system. It can enhance the stability of the system, improve the dynamic characteristics of the state variables, and can improve the control accuracy of output variables such as terminal voltage, active power output of the generator and the impedance of the TCSC. Simulation results show that to control TCSC and generator coordinately has the advantage of enhancing the stability of the system. From this point of view, the location where the TCSC is installed should be selected as close as possible to the power plant according to the environment condition of the installation, so that the coordinated control between the TCSC and the generator can be actually realized.