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

doi:10.16182/j.issn1004731x.joss.201710046

Abstract

Abstract: 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.

Key words: heat supply unit, AGC, coordinated control, coupling of thermal and electric load, variable pairing, decoupling

CLC Number:

TP273

Deng Tuoyu, Tian Liang, Liu Jizhen. Thermal and Electric Load Coupling Analysis and Decoupling Coordinated Control in Heat Supply Units[J]. Journal of System Simulation, 2017, 29(10): 2593-2599.

References

[1] 凡鹏飞, 张粒子, 谢国辉. 充裕性资源协同参与系统调节的风电消纳能力分析模型[J]. 电网技术, 2012, 36(5): 51-57.
(Fan Pengfei, Zhang Lizi, Xie Guohui.Analysis Model for Accommodation Capability of Wind Power With Adequacy Resources Involved in System Regulation[J]. Power System Technology, 2012, 36(5): 51-57.)
[2] Ummels B C, Gibescu M, Pelgrum E, et al.Brand. Impacts of Wind Power on Thermal Generation Unit Commitment and Dispatch[J]. IEEE Transactions on Energy Conversion (S0885-8969), 2007, 22(1): 44-51.
[3] 王漪, 薛永锋, 张敏, 等. 基于能量平衡法的供热机组电量分析数学模型[J]. 电力系统自动化, 2014, 38(8): 108-112.
(Wang Yi, Xue Yongfeng, Zhang min, et al. Mathematical Model for Power Quantity Analysis of Heating Unit Based on Energy Balance Method[J]. Automation of Electric Power Systems, 2014, 38(8): 108-112.)
[4] 吴龙, 袁奇, 刘昕. 供热机组热电负荷最佳分配方法分析[J]. 中国电机工程学报, 2012, 32(35): 6-12.
(Wu Long, Yang Qi, Liu Xin.Research on the Scheme of Optimal Load Distribution for Cogeneration Units[J]. Proceedings of the CSEE, 2012, 32(35): 6-12.)
[5] 吕泉, 姜浩, 陈天佑. 等. 基于电锅炉的热电厂消纳风电方案及其国民经济评价[J]. 电力系统自动化, 2014, 38(1): 6-12.
(Lyu Quan, Jiang Hao, Chen Tianyou.Wind power accommodation by combined heat and power plant with electric boiler and its national economic evaluation[J]. Automation of Electric Power Systems, 2014, 38(1): 6-12.)
[6] 龙虹毓, 徐瑞林, 马建伟, 等. 基于采暖需求侧管理的风电机组节能调度[J]. 太阳能学报, 2012, 33(4): 609-613.
(Long Hongyu, Xu Ruilin, Ma Jianwei, et al.Energy conservation regulation of wind turbines based on space heating end use management[J]. ACTA Energiae Solaris Sinica, 2012, 33(4): 609-613.)
[7] 李锋, 朱亚清. 热电联产机组协调控制策略的改进[J].热力发电, 2009, 38(2): 88-91.
(Li Feng, Zhu Yaqing.Improvement of Coordinated Control Strategy for Cogeneration Units[J]. Thermal Power Generation, 2009, 38(2): 88-91.)
[8] 刘吉臻, 王琪, 田亮, 等. 供热机组负荷-压力简化模型及特性分析[J]. 动力工程学报, 2012, 32(3): 192-196, 228.
(Liu Jizhen, Wang Qi, Tian Liang, et al. Simplified model and characteristic analysis of load-pressure object in heat supply units[J]. Journal of Chinese Society of Power Engineering, 2012, 32(3): 192-196, 228.)
[9] 刘鑫屏, 田亮, 王琪, 等. 供热机组发电负荷-机前压力-抽汽压力简化非线性动态模型[J]. 动力工程学报, 2014, 34(2): 115-121.
(Liu Xinping, Tian Liang, Wang Qi, et al.Simplified nonlinear dynamic model of generating load-throttle pressure-extraction pressure for heating units[J]. Journal of Power Engineering, 2014, 34(2): 115-121.)
[10] 孙灵芳, 孙晶淼. 球磨机制粉系统建模及广义预测控制的研究与应用[J]. 系统仿真学报, 2015, 27(6): 1329-1337.
(Sun Lingfang, Sun Jingmiao.Study of Improved Generalized Predictive Control in Ball Mill Application[J]. Journal of System Simulation, 2015, 27(6): 1329-1337.)
[11] 孔繁镍, 吴杰康. 水电站水力系统非线性动态模型仿真[J]. 系统仿真学报, 2012, 24(5): 1072-1076.
(Kong Fannie, Wu Jiekang.Hydraulic System Nonlinear Dynamic Model Simulation for Hydropower Station[J]. Journal of System Simulation, 2012, 24(5): 1072-1076.)
[12] 姜君, 陈庆伟, 郭健, 等. 基于逆系统解耦的动中通系统仿真研究[J]. 系统仿真学报, 2012, 24(10): 2203-2208, 2214.
(Jiang Jun, Chen Qingwei, Guo Jian, et al.Simulation Study on Mobile Satellite Communication System with Inverse System Decoupling Theory[J]. Journal of System Simulation, 2012, 24(10): 2203-2208, 2214.)
[13] Bristol E H.On a New Measure of Interactions for Multivariable Process Control[J]. IEEE Transactions on Automatic Control (S0018-9286), 1966, 11(1): 133-134.
[14] 田亮, 刘芳, 刘鑫屏, 等. 高速率变负荷模式下火电机组协调控制系统参数优化[J]. 系统仿真学报, 2015, 27(7): 1532-1540.
(Tian Liang, Liu Fang, Liu Xinping, et al.Parameter Optimization on Coordinated Control System of Thermal Power Units in High Rate Variable Load Operation Mode[J]. Journal of System Simulation, 2015, 27(7): 1532-1540.)
[15] 刘吉臻, 田亮, 曾德良, 等. 660 MW机组负荷-压力非线性特性的分析[J]. 动力工程, 2005, 25(4): 533-540.
(Liu Jizhen, Tian Liang, Zeng Deliang, et al.Analysis on the Nonlinearity of Load-Pressure Characteristics of a 660 MW Unit[J]. Chinese Journal of Power Engineering, 2005, 25(4): 533-540.)