微型燃气轮机冷热电联供系统集成优化与动态运行规律研究

发布时间：2018-06-25 09:43

  本文选题：MGT-CCHP系统 + 可调回热　； 参考：《东南大学》2015年博士论文

【摘要】：分布式能源系统集节能、环保和高安全等优势于一身,是缓解能源危机,减少环境污染和温室气体排放,实现可持续发展战略的有效途径。作为分布式能源系统的重要发展方向,微型燃气轮机冷热电联供系统(简称MGT-CCHP系统)是提供清洁、可靠、高质量、多用途的小型分布式能源的最佳方式之一。国内外对MGT-CCHP系统集成前后的静态性能已有较为深入的研究,但对部分设备及集成后系统的动态机理、控制规律和优化特性仍缺乏足够认识,以至于在MGT-CCHP系统的规划、设计和运行等方面均遇到一定的困难。本文通过建立MGT-CCHP系统的动态特性模拟、协调控制和集成优化环境,运用数值模拟方法,对MGT-CCHP系统的动态机理、控制规律和优化特性进行了系统深入的研究。论文针对MGT-CCHP系统配置优化中模型精度和求解便捷难以兼顾的问题,提出了基于设备3E变工况模型的MGT-CCHP系统集成特性建模方法,建立了能同时反映系统能耗、经济和污染物排放变工况特性的MGT-CCHP系统配置优化模型,提高了配置优化结果的准确性和精度；将配置优化的求解问题分解为可行方案的筛选和运行策略的优化问题,从结构形式和负荷匹配两个层面提出了适用的预定筛选策略,避免了配置组合量爆炸式增长,同时提高了可行方案质量；提出等微增运行优化法,使得多设备多负荷耦合下的MGT-CCHP系统负荷调度优化问题求解更为便捷。论文提出了模块化、通用化、分区集总和机理为主的建模思路,突破了MGT-CCHP系统设备形式和组合形式的限制,兼顾模型通用性和精度要求,首次建立了反映可调回热式MGT-CCHP单元型和多元型集成系统动态运行规律的数学模型；基于Matlab/Simulink平台,提出了分布参数环节、微分方程左右均含微分项的环节以及微分方程组和代数方程组强耦合环节等复杂模型的预处理和求解思路,实现了MGT-CCHP系统的二次建模；建立了MGT-CCHP各设备及单元型和多元型集成系统的动态数值仿真和调试环境,为MGT-CCHP系统动态特性和机理研究提供了重要平台。论文以80kW可调回热式微型燃气轮机和425kW溴化锂双效吸收式制冷机组成的MGT-CCHP系统为例,进行了静态设计和动态数值模拟研究。通过仿真实验,定量和定性深入分析了各集成设备及单元型和多元型MGT-CCHP系统的动态响应特性,揭示了MGT-CCHP系统主要参数的变化规律及各参数间的动态耦合关系。论文提出了MGT-CCHP系统动态机理模型的简化方法,建立了适用于控制的冷热电联供传递函数模型,为配置结构灵活、设计参数多样的MGT-CCHP系统的控制建模提供了重要参考；研究了单元型和多元结构型可调回热式MGT-CCHP系统的协调控制问题,提出了以微型燃气轮机排烟温度为关键状态量的分解补偿策略,基于多变量频域设计方法实现了MGT-CCHP单元机组的冷热电协调控制；以母管烟气能量输入输出平衡为中心,设计了多元结构型MGT-CCHP系统的闭环控制系统,实现了微型燃气轮机群和溴化锂制冷机群的协调运行。论文创新性地运用混合逻辑建模方法建立了适用于无蓄能并网MGT-CCHP系统运行优化的通用线性矩阵模型,该模型合理反映了多设备集成和多负荷产供的复杂耦合特性,能够在考虑系统运行负荷限和设备间启停逻辑的条件下,研究基于负荷主次策略和指标最优策略组合下的系统运行特性；通过优化算例,分析了该模型的性能及联供机组在经济目标驱动下跟踪负荷需求的运行特性,并研究了经济、能效、环保以及三者综合最优运行策略下MGT-CCHP系统的优化运行规律。
[Abstract]:The distributed energy system has the advantages of energy saving, environmental protection and high safety. It is an effective way to alleviate the energy crisis, reduce the environmental pollution and greenhouse gas emission, and realize the sustainable development strategy. As an important development direction of the distributed energy system, the micro gas turbine cooling and power supply system (MGT-CCHP system) provides cleaning, It is one of the best ways of reliable, high quality and multi-purpose small distributed energy. The static performance of MGT-CCHP system has been deeply studied at home and abroad. However, the dynamic mechanism, control law and optimization characteristics of some equipment and the integrated system are still lacking enough to understand the design and design of the MGT-CCHP system. The dynamic characteristic simulation of the MGT-CCHP system, the coordinated control and the integrated optimization environment are established in this paper. The dynamic mechanism, the control law and the optimization characteristics of the MGT-CCHP system are systematically studied by using the numerical simulation method. The paper aims at the model precision of the configuration optimization of the MGT-CCHP system. In order to solve the problem that is convenient and difficult to solve, a modeling method of MGT-CCHP system integration characteristics based on 3E variable condition model is proposed. A MGT-CCHP system configuration optimization model, which can simultaneously reflect the energy consumption of the system, and the characteristics of the economic and pollutant discharge conditions, is established, which improves the accuracy and accuracy of the configuration optimization results; and the configuration optimization is optimized. The solving problem is decomposed into the selection of the feasible scheme and the optimization of the running strategy. From the two levels of structure form and load matching, a suitable predefined selection strategy is proposed, which avoids the explosive growth of the configuration combination and improves the quality of the feasible scheme, and the same micro increment operation optimization method is proposed, which makes the MGT- of multi load and multi load coupling. The CCHP system is more convenient to solve the problem of load scheduling optimization. This paper puts forward the modeling idea of modularization, generality and the total mechanism of zoning set, which breaks through the restrictions on the form and combination of the MGT-CCHP system, and takes into account the generality and precision requirements of the model. It is the first time to establish a reportable MGT-CCHP unit and a multivariate integration. The mathematical model of the dynamic running law of the system; based on the Matlab/Simulink platform, the pre processing and solving ideas of the complex models, such as distributed parameter links, differential equations with differential equations and differential equations and strong coupling links of algebraic equations, are proposed, and the two modeling of the MGT-CCHP system is realized, and MGT-CCHP is established. The dynamic numerical simulation and debugging environment of the equipment and unit type and multi type integrated system provide an important platform for the study of the dynamic characteristics and mechanism of the MGT-CCHP system. The thesis takes 80kW as an example to adjust the MGT-CCHP system composed of a thermal micro gas turbine and a 425kW LiBr double effect absorption chiller, and carries out static design and dynamic numerical values. Simulation study. Through the simulation experiment, the dynamic response characteristics of the integrated equipment and the unit type and multi type MGT-CCHP system are analyzed quantitatively and qualitatively, and the changes of the main parameters of the MGT-CCHP system and the dynamic coupling relationship between the parameters are revealed. The simplified method of the dynamic mechanism model of the MGT-CCHP system is put forward, and the suitable method is set up. The cold and heat transfer function model used for control is an important reference for the control modeling of MGT-CCHP system with flexible configuration and various design parameters, and the coordination control problem of the unit type and multi structure reportable thermal MGT-CCHP system is studied, and the key state of the exhaust temperature of a micro gas turbine is put forward. The solution compensation strategy is based on the multi variable frequency domain design method to realize the cold and heat coordination control of the MGT-CCHP unit. The closed loop control system of the multi structure MGT-CCHP system is designed with the balance of the input and output of the flue gas energy input and output as the center. The coordinated operation of the micro gas turbine group and the lithium bromide refrigerating machine group is realized. The paper is innovative. The hybrid logic modeling method is used to establish a general linear matrix model suitable for the operation optimization of the MGT-CCHP system without energy storage. The model reflects the complex coupling characteristics of multi device integration and multi load production, and can study the main and secondary policy based on the load limit of the system and the starting and stopping logic between the equipment. The operation characteristics of the system under the combination of the optimal strategy and the optimal strategy are briefly analyzed. The performance of the model and the running characteristics of the tracking load demand driven by the combined supply unit under the economic target are analyzed by the optimization example. The optimal running rules of the MGT-CCHP system under the economy, energy efficiency, environmental protection and the integrated optimal operation strategy of the three parties are studied.
【学位授予单位】：东南大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU83;TM61
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本文编号：2065491