本文選題：冷熱電聯供　切入點：微電網　出處：《山東大學》2017年碩士論文　論文類型：學位論文

【摘要】：冷熱電聯供型微網的發(fā)展是分布式新能源發(fā)電的必然要求,為分布式電源有效利用和大規(guī)模接入的電網,同時提升電網電能質量和滿足用戶多種用能需求提供了解決方案。而壓縮空氣儲能系統(tǒng)具有冷熱電聯供特性,對于接入CCHP微網具有獨特優(yōu)勢。本文搭建含壓縮空氣的復合儲能系統(tǒng),為冷熱電聯供型微網提供一種兼具儲能容量和儲能密度、環(huán)境友好且能實現能量梯級利用的儲能方式。本文首先對蓄電池和超級電容的儲能特性做了簡要分析,在壓縮空氣儲能模塊的結構設計方面,加入換熱模塊,實現多級回熱,既避免了儲能系統(tǒng)對化石燃料的依賴,又提升了系統(tǒng)儲能效率。然后,設計了三種儲能方式結合的復合儲能系統(tǒng)整體結構。復合儲能系統(tǒng)的構建,為CCHP微網提供了一種大容量、快速響應、長壽命、高可靠性且滿足多種能量需求的儲能方式。壓縮空氣儲能系統(tǒng)本身是一個涉及多種能量形式互相轉化且結構復雜的系統(tǒng)。本文在壓縮空氣儲能系統(tǒng)熱力學分析方面,將系統(tǒng)分為壓縮、換熱、膨脹等主要環(huán)節(jié)進行分析,研究多種能量形式的轉換和各個環(huán)節(jié)能效。系統(tǒng)冷、熱、電三種能量形式相互獨立又互相影響,其分配方式會直接影響系統(tǒng)的綜合效率,所以需要在不同工況下,根據用戶對冷熱電的不同需求,對系統(tǒng)能量進行有效管理。復合儲能系統(tǒng)研究的重點是能量管理和控制策略。本文將充分考慮冷熱電梯級利用,提升系統(tǒng)綜合效率。在控制策略上,采用主動儲能形式,首先采用最優(yōu)裁剪學習機法對分布式能源發(fā)電功率進行多時間尺度預測,并根據微網調度功率確定儲能目標功率,然后通過經驗模態(tài)分解(EMD)法,結合風機功率、冷熱電負荷、各儲能單元效率、容量配置成本、SOC等約束,對壓縮空氣儲能、蓄電池、超級電容三種儲能方式目標功率進行分配。在得到壓縮空氣儲能目標功率后,根據微網對冷熱電動負荷情況,對系統(tǒng)進行有效能量管理,以此提升了復合儲能系統(tǒng)綜合效率,且盡可能的滿足了用戶對不同能量形式的需求。最后,在復合儲能實驗平臺的監(jiān)測與控制方面,設計了基于LabVIEW和MATLAB聯合的上位監(jiān)控系統(tǒng)。實現了系統(tǒng)的實時監(jiān)測,并將控制策略轉換為實時控制信號,對復合儲能實驗平臺進行了有效的能量管理。
[Abstract]:The development of cogeneration microgrid is the inevitable requirement of distributed new energy generation. At the same time, it provides a solution to improve the power quality of power grid and meet the multiple energy needs of users. The compressed air energy storage system has the characteristics of combined cooling and heat supply. In this paper, a composite energy storage system with compressed air is set up to provide both energy storage capacity and energy storage density for the combined cooling and heat supply microgrid. In this paper, the energy storage characteristics of storage battery and super capacitor are analyzed briefly. In the structural design of compressed air energy storage module, heat transfer module is added to realize multistage heat recovery. It not only avoids the dependence of the energy storage system on fossil fuels, but also improves the energy storage efficiency of the system. Then, the whole structure of the composite energy storage system is designed, which combines three energy storage methods. The construction of the composite energy storage system provides a large capacity for the CCHP microgrid. Quick response, long life, The compressed air energy storage system itself is a system involving a variety of energy forms and complex structure. In this paper, the thermodynamic analysis of compressed air energy storage system is presented. The system is divided into compression, heat transfer, expansion and other main links to analyze, to study the conversion of various energy forms and energy efficiency of each link. Its distribution mode will directly affect the overall efficiency of the system, so it needs to be in different working conditions, according to the different needs of users for cooling and heating electricity, The research of compound energy storage system is focused on energy management and control strategy. In this paper, the utilization of cold and hot elevators is fully considered to improve the overall efficiency of the system. In the control strategy, active energy storage is adopted. First, the distributed energy generation power is forecasted by multi-time scale with the optimal cutting learning machine method, and the energy storage target power is determined according to the micro-grid dispatching power. Then, by empirical mode decomposition (EMD) method, combined with the fan power, the cooling and thermal power load is obtained. The target power of compressed air energy storage, storage battery and super capacitor is distributed by the constraints of efficiency, capacity configuration cost and SOC of each energy storage unit. After the target power of compressed air energy storage is obtained, According to the situation of microgrid to the electric load of cold and heat, the effective energy management is carried out to improve the comprehensive efficiency of the composite energy storage system, and to meet the needs of the user for different energy forms as much as possible. Finally, In the aspect of monitoring and control of the compound energy storage experiment platform, the upper monitoring system based on LabVIEW and MATLAB is designed. The real-time monitoring of the system is realized, and the control strategy is converted into the real-time control signal. Effective energy management is carried out on the experimental platform of composite energy storage.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TK02;TM727

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