Study on Coordination Control of Subcritical Circulating Fluidized Bed Units with Win-Win Source Network

CPS评价体系下循环流化床机组协调控制方法研究

¹ North China Electric Power University, Baoding 071003, China
² Harbin Institute of Technology, Harbin 150001, China

Received: 6 May 2018

Abstract

Aiming at the large delay and inertia characteristics of circulating fluidized bed units, a coordinated control method of circulating fluidized bed units under the CPS evaluation system of power grid is proposed. Firstly, starting from the power grid performance evaluation index CPS, the formation characteristics of regional control error ACE in the CPS index are analyzed. Then, according to the operation characteristics of circulating fluidized bed units, the feasibility of realizing the boiler-turbine-grid coordinated control system is revealed. Then, the switch controller based on the energy state of the boiler and the optimal controller based on CPS standard are designed to realize the boiler network. Finally, through simulation experiments, it is verified that the proposed control methods not only meets the requirements of power grid for unit evaluation better, but also takes into account the overall energy state of the boiler to improve the control performance of main steam pressure, and achieves the win-win control effect of circulating fluidized bed units and power grid.

摘要

针对循环流化床机组的大延迟、大惯性特性，提出了在电网CPS评价体系下循环流化床机组的协调控制方法。首先是从电网性能评价指标CPS出发，分析CPS指标中区域控制误差ACE的形成特点；然后根据循环流化床机组的运行特性，揭示循环流化床机组实现源网双赢炉机网协调控制的可行性；接下来设计基于锅炉能量状态的开关控制器和基于CPS标准的最优控制器，实现炉机网的协调控制；最后通过仿真实验，验证了文中提出的控制方法不仅更好地满足了电网对于机组的考核要求，而且兼顾了锅炉整体能量状态改善了主汽压的控制，达到了循环流化床机组和电网双赢的控制效果。