【作者】 汪舒生；

【导师】 李良光；

【作者基本信息】 安徽理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 中小企业选择合适的电源保障产品能有效的解决其对现代化办公方式的依赖,而功率在10KVA以下的小功率UPS恰好满足了中小企业在这方面的需求。由此看来UPS电源的应用地位日趋重要和广泛。但传统的小功率在线互动式UPS存在固有的缺陷,本文设计一种改进的小功率在线互动式UPS,它采用带耦合电感的双向DC/DC变换电路作为UPS的蓄电池组充放电电路。具有省去了工频变压器、对铅酸蓄电池组充电进行管理、提高蓄电池组的寿命、稳定直流总线电压、实现能量双向流动等优点。本文详细地分析了变换器的工作原理和主电路参数设计,在占空比为35%～55%之间,匝比N=6时,由蓄电池电压48V升压至直流总线电压360V,另外实现了能量的双向流动,通过仿真与实验验证了该方案的可行性。在蓄电池组检测方面,采用交流法测量蓄电池内阻,实现对蓄电池组运行参数的实时监测。另外,采用重复控制与PI控制相结合的复合数字控制算法应用在UPS主控制系统中,可以提高系统的稳定性和鲁棒性。更多还原

【Abstract】 SMEs choose the right power protection products to be an effective solution to their dependence on modern office methods,and power in the following 10KVA UPS just small power of the SMEs in the meet this demand.So the application of UPS status has become increasingly important and widespread.However,traditional small interactive on-line UPS power inherent shortcomings,design of a small power line interactive UPS is improved in this paper,using inductively coupled with the bi-direetional DC/DC converter circuit as the UPS battery charge and discharge circuit. It has omitted the frequency transformer,the rechargeable lead-acid battery management,increased battery life,stability,DC bus voltage to achieve the advantages of two-way flow of energy.In this paper,working principle of the converter and parameter design of master circuit has been analysed detailed.In the duty cycle of 35%to 55%,and the turns ratio N = 6,battery voltage 48V has been increased to DC bus voltage 360V.In addition, the two-way flow of energy has been achieved,Simulation and experimental confirmed the feasibility of the programme.In the battery detection,measuring battery internal resistance using AC-method,real-time monitoring of the battery operating parameters has been realized.In addition,Synthesized digital control algorithm using the combination of repetitive control and PI control used in the UPS master control system,the stability and robustness of the system has been enhanced.更多还原