供热机组热电耦合特性分析与解耦协调控制

发布时间：2018-06-06 06:03

  本文选题：供热机组 + AGC　； 参考：《系统仿真学报》2017年10期

【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。
[Abstract]:The existing coordinated control system for heating units is difficult to meet the requirements of automatic generation control (AGCs) control after wind power is connected to the grid on a large scale, so it is necessary to analyze the dynamic coupling degree of heat and power of the units in depth. The small deviation linearization of the dynamic model of the heating unit is used to obtain the transfer function matrix model which includes the characteristics of the heating side. The thermoelectric coupling characteristics are analyzed and decoupling is designed based on the existing coordinated control pairing. The relative gain matrix (RGA) method and simulation experiment method are used to compare the coupling degree of heat supply extraction butterfly valve to generation load before and after decoupling. The simulation results show that adding the static decoupling device of butterfly valve opening to the engine front pressure and generation load can effectively reduce the influence of the heat supply disturbance on the generation load and solve the difficulty of AGC during the heat supply period of the unit.
【作者单位】： 华北电力大学新能源电力系统国家重点实验室;
【基金】：国家973计划(2012CB215203) 中央高校基本科研业务费专项资金(2017MS132)
【分类号】：TM621
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本文编号：1985462