斯特林发动机异步电机发电系统研究

发布时间：2018-09-19 10:40

【摘要】：新型清洁能源发电技术被认为是解决能源危机、遏制环境污染、满足不断增长的电力需求的重要方法。其中，将范围广、类型多、储量大的热能资源，以分布式发电的方式，进行热电转换或热电联供，应用前景良好。斯特林发动机作为热效率高的外燃机，具有内燃机、燃气轮机等不具备的特点，如燃料适应性强、零污染排放、低噪音等，具有明显的发电应用优势。然而，斯特林机的功率调节缓慢，外特性软，不能自起动与控制转速，将斯特林发动机作为发电系统的原动机，系统的控制策略需要匹配其工作特性。为了解决上述问题，本文针对以笼型异步电机作为发电机的斯特林发电系统，结合发电端斯特林机功率控制特性和异步电机的转差频率控制、储能端蓄电池的充放电特性、用电端逆变器在并网发电/离网发电时不同的控制要求，分析并设计了系统并/离网控制方案，详细阐述了系统的整体控制流程。本文设计并完成了包含主功率电路、双向DC-DC变换器和控制电路的发电系统控制柜一台，完成了软件结构设计和控制程序编程，并根据系统需要，设计并实现了基于MODBUS的组件间485通信。为了验证控制策略的有效性，本文设计了斯特林发电系统各组件的参数并选型，组建了由斯特林外燃机、异步电机等组件组成、以天然气为供应燃料的50kW发电系统，以测试控制方案。通过试验测试，系统能实现拖动斯特林起动、外网充电、发电功率调节等功能，实现了系统的控制目标。论文结果表明，，本文针对斯特林发动机异步电机发电系统的控制策略满足工作要求，斯特林发电系统具有进一步研究和开发的潜力。
[Abstract]:New clean energy power generation technology is considered to be an important method to solve the energy crisis, curb environmental pollution and meet the increasing demand for electricity. Among them, the thermal energy resources with a wide range, many types and large reserves will have a good prospect in the application of thermal power conversion or cogeneration of heat and power in the way of distributed power generation. Stirling engine, as an external gas engine with high thermal efficiency, has many advantages such as strong fuel adaptability, zero pollution emission, low noise and so on, which are not available in internal combustion engines and gas turbines. However, the power regulation of Stirling engine is slow, the external characteristic is soft, and it can not start and control the rotational speed. The Stirling engine is regarded as the prime mover of the power generation system, and the control strategy of the system needs to match its working characteristics. In order to solve the above problems, this paper aims at the Stirling power generation system with cage induction motor as the generator, combining the power control characteristics of the Stirling generator at the generator end and the switching frequency control of the asynchronous motor, and the charging and discharging characteristics of the storage battery. The different control requirements of power terminal inverter in grid-connected generation and off-grid generation are analyzed and designed, and the overall control flow of the system is described in detail. In this paper, a control cabinet of power generation system including main power circuit, bidirectional DC-DC converter and control circuit is designed and completed. The software structure design and control program are completed, and according to the need of the system, The communication between components based on MODBUS is designed and realized. In order to verify the effectiveness of the control strategy, the parameters of each component of Stirling power generation system are designed and selected, and a 50kW power generation system, which is composed of Stirling external gas generator, asynchronous motor and natural gas supply fuel, is constructed. To test the control scheme. The test results show that the system can realize the functions of driving Stirling starting, charging the outer net, and regulating the power of power generation, and realizes the control goal of the system. The results show that the control strategy of Stirling engine asynchronous motor power generation system meets the requirements of the work, and the Stirling power generation system has the potential of further research and development.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM343

【参考文献】