永磁同步发电机用逆变器研究

发布时间：2018-05-11 17:30

  本文选题：军用移动电站 + 永磁同步发电机　； 参考：《西安科技大学》2017年硕士论文

【摘要】：军用移动电站(Military Mobile Power Station,简称MMPS)是野战条件下军队武器装备和后勤保障的主要电能来源,是打赢现代化战争的重要保证。其主要组成包括:发电装置部分、功率主电路部分、控制系统部分、运载部分。目前,大量装备部队的MMPS发电装置是柴油发电机组,由于发动机供油系统存在不可避免的扰动问题,其输出电压幅值和频率不稳难以保证武器系统和后勤保障对电能质量的要求。因此,需要为柴油发电机组中的永磁同步发电机(Permanent Magnet Synchronous Generator,简称PMSG)设计配套的逆变系统,完成电能变换,以达到武器系统和后勤保障对电能质量的严格要求。同时,为使MMPS供电系统的性能、容量、可靠性、安全性和扩展性满足各种现代武器装备和后勤保障的要求,就需要两台或以上电站组网的方式提供电能,组成任意所需容量的冗余供电系统,即构建“战术微电网”,而利用MMPS组建“战术微电网”的核心技术是逆变器并联控制技术。因此,本文主要围绕PMSG用逆变器设计和逆变器并联控制技术两大问题展开分析与研究。首先,为使PMSG输出的三相交流电压和频率能够恒定且满足用电要求,且给单相负载提供电能和提高带不平衡负载的能力,本文为PMSG用逆变器系统设计了三相桥式不控整流电路-双Boost升压电路-三相桥式逆变电路的AC-DC-DC-AC变换器拓扑结构,并推导了其关键组件的数学模型。为了克服负载突变时母线电压波动的情况,提出了基于逆变器输出电感电流的扰动补偿复合控制策略,提高系统响应速度,改善Boost升压电路输出电压波形;且对三相逆变器完成了电压电流解耦双闭环控制策略的设计。在理论研究的基础之上,利用MATLAB/Simulink软件进行了仿真,仿真结果验证了 PMSG用逆变器系统控制策略的正确性。其次,在传统下垂控制方法理论分析的基础上,为实现逆变器并联系统功率均分、环流抑制和提高系统的动态响应,提出了一种改进的逆变器并联下垂控制方法。其改进内容是:针对传统下垂法反馈信号不能准确测到等效线路阻抗后的公共节点电压,基于逆变器输出端电压推导出了改进功率计算公式,提高了 PMSG用逆变器并联系统均流控制器的控制精度;针对PMSG用逆变器并联系统中不同电压等级连接线路阻抗不同引起的无功环流,设计了线路压降补偿环节,改善了逆变器并联系统的均流性能;针对利用低通滤波器计算功率时对并联系统动态响应的影响,在传统下垂法的基础上增加积分环节和微分环节,加快了系统的动态响应,消除了静态误差。仿真结果表明,所提改进下垂控制法可以很好地实现逆变器的功率均分和环流抑制,提高了系统响应速度。最后,本文以TI公司型号为TMS320F28335的DSP作为核心控制芯片,CREE公司型号为C2M0280120D的SiC MOSFET作为功率器件,搭建了 PMSG用逆变器系统硬件平台,在此平台上进行了试验验证。试验结果表明,本文设计的PMSG用逆变器系统满足设计要求,达到了预期目的,进一步验证了设计的合理性和可行性。
[Abstract]:Military Mobile Power Station (abbreviated as MMPS) is the main power source of military equipment and logistic support in the field of field warfare. It is an important guarantee to win the modern war. Its main components include the power generation unit, the power main circuit part, the control system part, the carrier part. At present, a large number of troops are equipped with MMP. The S power generation unit is a diesel generating set. Because of the inevitable disturbance in the engine oil supply system, its output voltage amplitude and frequency instability are difficult to ensure the requirements of the weapon system and the logistic support to the quality of the electric energy. Therefore, the permanent magnet synchronous generator (Permanent Magnet Synchronous Generator) in the diesel generator set is required. For short, PMSG) designed a complete set of inverter systems to complete the electrical energy conversion to achieve strict requirements for the quality of the power system and logistics support. At the same time, for the performance, capacity, reliability, safety and scalability of the MMPS power supply system to meet the requirements of various modern weapons and logistic support, two or more power stations are needed. The type of redundant power supply system of arbitrary required capacity is provided, that is to construct the "tactical micro grid", and the core technology of using MMPS to form "tactical micro grid" is the inverter parallel control technology. Therefore, this paper focuses on the analysis and research of the two problems of PMSG inverter design and inverter parallel control technology. First, In order to make the three-phase AC voltage and frequency of the PMSG output constant and satisfy the demand for electricity, and provide the power of the single phase load and the ability to increase the unbalanced load, this paper designs a AC-DC-DC-AC converter topology for the three-phase bridge type uncontrolled rectifier circuit, the double Boost boost circuit and the three-phase bridge inverter circuit for the inverter system. In order to overcome the voltage fluctuation of the bus, the disturbance compensation complex control strategy based on the output inductance current of the inverter is proposed to improve the response speed of the system and improve the output voltage waveform of the Boost boost circuit, and the three-phase inverter has completed the dual closed loop voltage and current decoupling closed loop. The design of control strategy. On the basis of the theoretical research, the simulation is carried out using MATLAB/Simulink software. The simulation results verify the correctness of the control strategy of PMSG inverter system. Secondly, on the basis of the theoretical analysis of the traditional droop control method, the power equalization of the inverter parallel system, the circulation suppression and the improvement of the system are achieved. In dynamic response, an improved inverter parallel droop control method is proposed. Its improvement is that the feedback signal of the traditional droop method can not accurately measure the common node voltage after the equivalent circuit impedance. Based on the output voltage of the inverter, the improved power calculation formula is derived, and the parallel flow control of the PMSG inverter parallel system is improved. The control precision of the system is designed. In view of the reactive current caused by different voltage levels in the parallel inverter parallel system of PMSG, the circuit pressure drop compensation link is designed to improve the current sharing performance of the inverter parallel system, and the influence on the dynamic response of the parallel system when the power is calculated by using the low pass filter is made in the traditional droop. On the basis of the method, the integral link and the differential link are added, the dynamic response of the system is accelerated and the static error is eliminated. The simulation results show that the proposed improved droop control method can well realize the power sharing and circulation suppression of the inverter and improve the response speed of the system. Finally, this paper takes the DSP of the TI company as TMS320F28335 as the core. The core control chip, the CREE company model of C2M0280120D SiC MOSFET as the power device, set up the hardware platform of the PMSG inverter system, and tested the test on this platform. The test results show that the PMSG inverter system designed in this paper meets the design requirements and achieves the expected purpose, further validates the rationality and feasibility of the design. Sex.

【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM313;TM464

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中国期刊全文数据库 前10条

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本文编号：1874892