证据融合理论在水机PID模型中的应用

Application of Evidence Fusion Theory in Hydroturbine PID Model

针对水电运行仿真系统中由于水轮机组的动态特性使常规PID控制器难以适应所有的运行工况，从而引起调节过程的超调量过大、调节时间长和系统的转速频率震荡等问题，在信息融合理论的基础上，提出了一种基于证据融合理论的水机PID模型。该模型以分布于机组中的多传感器的局部决策结果为证据，在PID融合中心以证据推理的方法融合多源证据，以改善水轮机的整体调节性能。经在丰满水电运行仿真系统的实验，验证了该模型的有效性和实际应用价值。

In the hydroelectrical simulation system, to solve the problems derived from traditional PID controller couldn't adopt all of the running condition, such as large overshoot and long adjust time of PID controller, vibration of rotate speed and frequency of system, a new hydroturbine PID model based on evidence fusion is proposed in the background of information fusion theory. In this model, to improve the global performance of hydroturbine, evidences are gained from multisensors that are embedded to gather the information of environment, and multi source evidences are fused in the PID fusion center. Validity and value of practical application are validated through the experiment in the Fengman hydroelectric simulation system.