基于蒸汽壓縮制冷技術(shù)的干式整流變壓器溫度控制仿真研究
發(fā)布時間：2020-12-14 20:53
地鐵牽引變電所作為地鐵供電系統(tǒng)的樞紐,對保障地鐵車輛的安全、穩(wěn)定運行具有重要的意義。而整流變壓器是地鐵牽引變電所的重要設(shè)備之一。整流變壓器良好的工作效率是牽引變電所正常工作的重要因素。為此,本文對前蘇聯(lián)地區(qū)地鐵牽引變電所中干式整流變壓器的蒸汽壓縮制冷循環(huán)技術(shù)及其預防過熱的溫度控制方法展開研究具有實際意義。論文首先描述了地鐵牽引變電所中干式整流變壓器溫度控制技術(shù),即蒸汽壓縮制冷循環(huán)（Vapor-Compression Cycle,VCC）技術(shù)的基本原理,研究了VCC系統(tǒng)的基本結(jié)構(gòu)、數(shù)學模型、模塊組成及控制框圖,并分析了制冷劑的作用;其次,闡述了VCC系統(tǒng)的內(nèi)、外環(huán)的模塊結(jié)構(gòu),探討了VCC系統(tǒng)內(nèi)、外環(huán)控制器的控制策略,確定外環(huán)采用比例積分（PI）,內(nèi)環(huán)采用模型預測控制（MPC）的基本結(jié)構(gòu);接著研究了干式整流變壓器溫度控制中預防過熱的概念及實現(xiàn)預防過熱的控制方法,設(shè)計了干式整流變壓器溫度控制中相關(guān)參數(shù);最后,通過仿真研究驗證了VCC模型的合理性和預防過熱控制方法的有效性。論文通過改進VCC內(nèi)、外環(huán)路結(jié)構(gòu)降低了系統(tǒng)控制的復雜度,預防過熱的控制方法有效保證了干式整流變壓器的過熱;同時選擇冷卻劑R...
【文章來源】：蘭州交通大學甘肅省
【文章頁數(shù)】：53 頁
【學位級別】：碩士
【文章目錄】：
摘要
Abstract
1 Introduction
1.1 Background and significance of study
1.2 Research status
1.2.1 Development situation of vapor-compression technology
1.2.2 Present state of dry-type rectifier transformer
1.2.3 Research’s key problems
1.3 Main contents
2 Vapor-compression cycle（VCC）
2.1 Chapter’s outline
2.1.1 Concepts of refrigeration
2.1.2 Production of artificial cold
2.2 Module of VCC
2.3 Pressure and enthalpy process
2.4 Control structure
2.5 Freon for refrigeration
3 Inner loop
3.1 Design of inner loop module
3.1.1 MPC controller
3.1.2 Relation of MPC and VCC
3.2 Control strategy of inner loop
4 Outer loop
4.1 Design of outer loop module
4.1.1 Main component- PI controller
4.1.2 Introduction of Minimal stable superheat（MSS）
4.1.3 Cooling load demand’s function
4.2 Control strategy of outer loop
5 Temperatures control of system
5.1 Concept of temperature control
5.1.1 Temperature control of transformers
5.1.2 Utilized temperature control method
5.1.3 Parameters of the used temperature sensor
5.2 Results through simulation
5.2.1 System temperature variation
5.2.2 Another results of vapor-compression system
Conclusion
Acknowledgements
References
Results of research during Degree Studies
本文編號：2917005
【文章來源】：蘭州交通大學甘肅省
【文章頁數(shù)】：53 頁
【學位級別】：碩士
【文章目錄】：
摘要
Abstract
1 Introduction
1.1 Background and significance of study
1.2 Research status
1.2.1 Development situation of vapor-compression technology
1.2.2 Present state of dry-type rectifier transformer
1.2.3 Research’s key problems
1.3 Main contents
2 Vapor-compression cycle（VCC）
2.1 Chapter’s outline
2.1.1 Concepts of refrigeration
2.1.2 Production of artificial cold
2.2 Module of VCC
2.3 Pressure and enthalpy process
2.4 Control structure
2.5 Freon for refrigeration
3 Inner loop
3.1 Design of inner loop module
3.1.1 MPC controller
3.1.2 Relation of MPC and VCC
3.2 Control strategy of inner loop
4 Outer loop
4.1 Design of outer loop module
4.1.1 Main component- PI controller
4.1.2 Introduction of Minimal stable superheat（MSS）
4.1.3 Cooling load demand’s function
4.2 Control strategy of outer loop
5 Temperatures control of system
5.1 Concept of temperature control
5.1.1 Temperature control of transformers
5.1.2 Utilized temperature control method
5.1.3 Parameters of the used temperature sensor
5.2 Results through simulation
5.2.1 System temperature variation
5.2.2 Another results of vapor-compression system
Conclusion
Acknowledgements
References
Results of research during Degree Studies
本文編號：2917005
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