【作者】 汪全涛；

【导师】 韩民晓；

【作者基本信息】 华北电力大学（北京） ， 电力电子与电力传动， 2007， 硕士

【摘要】 电力用户对电能质量的要求日益提高,电压暂降对用户造成的巨大经济损失,已经成为电能质量问题中最亟待解决的问题之一;通常而言,为保证重要用户的可靠供电,对供电要求较高的企业、机关、楼宇,均采用相对独立的双路供电系统。本论文提出了一种基于双路供电的电压暂降减缓措施,即双路供电集成电源(IPS)。系统地阐述了装置工作原理和各个组成部分。完成了在线式IPS装置的主电路和控制电路的设计工作。对于电压和电流的检测算法,论文在比较各种算法的优缺点后选用了基于瞬时无功功率理论的d-q分解法和电压有效值法。逆变器采用基于SPWM的调制方式,为了达到提高直流电压利用率的目的,针对三相三线制负载采用了完备PWM调整方式。控制算法中加入的PID调节器使装置的输出一直稳定在额定电压。所有这些控制算法都通过仿真计算进行了验证,并在样机上进行了实验。论文利用研制的工业样机进行了静态电压偏差、短时中断、一路电源发生电压暂降、两路电源同时发生电压暂降等电能质量问题的实验。实验证明,装置可以很好地解决上述电能质量问题,达到了预期的目标。更多还原

【Abstract】 The demand of high power quality for electric consumer is increasing in nowadays IT society. The economy losses caused by the voltage sags have become one of the main culprits in the power quality problems which should be settled. Usually, the relatively independent duplex feeding system is adopted to meet the need of the high power quality standard in the power supply of enterprises, departments and buildings.A measure to reduce voltage sags based on duplex feeding system is put forward in this paper, that is, duplex feeding integrated power system. The operation principle of the equipment and its main sections are systematically stated. The main circuit of on-line IPS equipment and the control circuit have been designed. For the detection method to voltage and current, d-q analyzing method based on instantaneous reactive power-theory and voltage RMS method are selected in this paper after comparing the advantages and disadvantages of every method currently. The modulation mode, SPWM, was introduced in the inverter. In order to improve DC voltage utilization efficiency, compact PWM modulation mode is adopted to three-phase, three-wire load. PID adjustment enables output voltage close to rated voltage stably. All of control arithmatics were validated by simulation and experiment on sample machine.Power quality problems about voltage deviation, dynamic voltage sags, voltage sags occurred on one feeding and voltage sags occurred on duplex feeding simultaneously, etc were experimented on sample machine. It was proved that the equipment, IPS, can efficiently solve above problems and meet expected object.更多还原