供热机组热电耦合特性分析与解耦协调控制  

Thermal and Electric Load Coupling Analysis and Decoupling Coordinated Control in Heat Supply Units

作　　者：邓拓宇[1] 田亮[1] 刘吉臻[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《系统仿真学报》2017年第10期2593-2599,共7页Journal of System Simulation

基　　金：国家973计划(2012CB215203);中央高校基本科研业务费专项资金(2017MS132)

摘　　要：现有的供热机组协调控制系统难以满足风电规模化并网后的自动发电控制(AGC,automatic generation control)要求,需要深入分析机组热电动态耦合程度。将供热机组动态模型小偏差线性化得到包含供热侧特性的传递函数矩阵模型。结合现有的协调控制配对分析热电耦合特性并设计解耦器。分别通过相对增益矩阵(RGA)法和仿真实验法比较解耦前后供热抽汽蝶阀对发电负荷的耦合程度。仿真实验发现在基本炉跟机方案中加入蝶阀开度对机前压力和发电负荷的静态解耦器,可以有效减小供热扰动对发电负荷的影响,解决机组供热期投AGC的困难。Due to large scale wind power integration, heat supply units hardly meet the AGC （automatic generation control） requirement by the existed coordinated control system. It is necessary to analyze coupling characteristics of thermal and electric load thoroughly. A transfer function matrix including characteristics of heat supply part was gained by small deviation linearization of a dynamic unit＇s model. Coupling characteristics was analyzed based on variable pairings of the existed coordinated control system and decouplers were designed. Relative gain matrix measure and simulation were used to compare the coupling extent before and after decoupling. Simulation experiments show that adding static decouplers to basic boiler-following control scheme can decrease the power load disturbances effectively which are caused by thermal variation.

关 键 词：供热机组 AGC 协调控制 热电耦合 变量配对 解耦 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]