超临界(或直流炉)机组协调与给水控制系统，其被控对象具有多入多出强耦合、非线性、变参数的特点。研究工作以受控系统能控且可稳为设计目标，以2种类型的实际运行机组为研究实例，设计相应的控制系统。针对直流炉机组给水控制系统的技术难点问题，首先分别给出协调与给水控制系统单独运行时的稳定性条件及证明，再进一步由数学推理给出整个控制系统联合运行的稳定性分析。以2台300 MW亚临界直流炉机组和1台600 MW超临界机组的实际运行效果，验证了该研究方法的有效性和实用性。数学分析还揭示了控制系统中PID调节器的作用，为实际工程应用中参数整定和误差估计提供了理论依据和实用方法。

The characteristics of once-through boiler power coordinated and feed water control system are strong coupling of multiple inputs and multiple outputs, non-linearity, time-varying parameters. Design object of the study work is that controlled systems are controllable and stable. Two type of the practical running power were used as research object, the control system was designed accordingly. At first, the preconditions and proofs of stability of coordinated control system (CCS) and feed water control system (FWCS) were given respectively, then stability analysis for CCS and FWCS were made by mathematical derivation according to the technical problems of FWCS. The application results of 2′300 MW sub critical once-through boiler units and one 600 MW super critical power unit show effectiveness and practicability. Also, function of PID controller for controlled system was elicited by mathematical analysis, and it gives theoretic basis and application method for control parameters tuning and error estimation.

中国电力科学研究院科技创新基金(ZDKJB200712)。