熔盐储能技术是提升火电机组深度调峰能力和调频能力的重要技术手段。本文分析了熔盐储能供热机组的动态性能,给出了其运行方式和解耦协调控制策略。从传递函数的角度提出基于误差的一阶线性自抗扰控制(LADRC)可以看作是PI控制和一阶滤波器串联的结构。将模型参数非线性视作总扰动,采用二阶线性自抗扰控制和基于误差的一阶线性自抗扰控制的PID实现形式,完成了熔盐储能供热机组的一次调频控制。仿真结果表明,线性自抗扰控制的PID实现保持了自抗扰控制突出的扰动抑制能力,控制性能和抗扰性能优于传统的PID控制。基于误差的一阶线性自抗扰的PID形式较二阶线性自抗扰的PID形式系统响应速度更快,扰动抑制能力更强。本文提出的方法意义明确,组态简单,拓宽了线性自抗扰控制的工程应用空间。

Molten salt energy storage technology is an effective way to enhance the deep peak shaving and frequency regulation capabilities of thermal power units. In this paper, the dynamic performance of the molten salt energy storage heating unit has been analyzed, and its the operating mode and decoupling coordination control strategy have been provided. From the perspective of transfer function, it is proposed that the first-order LADRC based on error can be seen as a product structure of PI control and a first-order filters. Under the premise of considering the nonlinearity of the model parameters as the total disturbance, the PID implementation of the second-order LADRC and the first-order LADRC based on error was adopted to complete the primary frequency regulation control of the molten salt energy storage heating unit. The simulation results show that the PID implementation of LADRC maintains the outstanding disturbance rejection ability of ADRC, and the control performance and disturbance rejection performance are better than traditional PID control. The PID form of first-order LADRC based on error has faster response speed and stronger disturbance rejection compared to the PID form of second-order LADRC. The method proposed in this paper has clear significance, simple configuration, and expands the engineering application space of LADRC.

海南省自然科学基金(623RC506)