【作者】 申淑静；

【导师】 李庆东； 何培祥；

【作者基本信息】 西南大学 ， 农业机械化工程， 2010， 硕士

【摘要】 为工业和国民经济其他部门提供基本能源的电力工业,目前虽然有了很大的发展,例如全国各地不断建立起大中型火力发电厂、水电站及一些核电厂、风力发电站,总装机容量迅猛地增长,到2009年,总装机容量达到8.74亿kW。但当夏季、冬季供电高峰期来临之时,仍然难以满足经济发展的需要,尤其对于边远偏僻地区、临时性工业现场、不允许停电的重要部门,以及供电负荷短缺、经常停电的经营场所,就特别需要能有移动方便、经济适用的备用电源。地震、雪灾、洪水等自然灾害,对电力设施的破坏,对安全供电的影响,都极为严重,此时,自备电源能有效提供备用电源,保证各种设备的正常运行。变频发电机组作为中小功率供电设备,由于它具有体积小,成本低,移动方便等特点,是目前应急供电的理想设备。当需要大功率电源时,考虑到变频发电机的经济性和利用率,选用多台发电机并联发电的方式比采用单台大功率发电机更经济合理。但是多台发电机并联存在功率分配不均的问题,论文针对功率分配不均问题进行设计研究,采用整流并联均流控制系统来达到功率平衡。控制系统主回路采用桥式整流电路对各变频发电机输出的三相交流电进行整流,经功率平衡后得到的直流电压经逆变后对负载供电；以PIC18F2320芯片为整个控制系统的核心,通过霍尔传感器采集支路电流,利用PIC自带的A/D转换模块对电流信号进行A/D采集,并采用模糊PID算法进行运算处理,输出合适的PWM信号来驱动IGBT栅极,完成系统的功率均衡。系统外围模块包括：电源模块部分、模拟量输入部分、主回路、PWM输出部分以及保护电路等辅助部分。软件部分采用模糊PID算法对支路电流进行均流平衡。试验测试表明,本论文研究设计的变频发电机组并联均流控制器能够基本实现两台发电机并联系统的均流控制。带负载情况下均流误差波动范围为1.30%-2.95%,均流性好。更多还原

【Abstract】 Now the power industry has a great development, providing basic power for the industry and other sectors of the national economy. Medium-sized thermal power plants, hydroelectric plants, some nuclear power plants and wind power stations have been building throughout the country, with a total installed capacity to grow rapidly, reaching 874 million kW by 2009. When the summer and winter, however, the electricity is still difficult to meet the needs of economic development, especially for remote and isolated areas, temporary industrial sites, vital sectors of not allowing power failure, as well as supply load of power shortage.These sections need to have back-up power supply with easy to move and economical to use. Natural disasters such as earthquakes, snowstorms, floods, damage power facilities and impact on the safety of power supply seriously. At this time, self-powered electrical energy can provide follow-up to ensure the normal operation of various equipment.Inverter generator sets as a small power supply facilities is the ideal power supply emergency equipment, with its small size, low cost, easy moving and so on. When high power supply is needed, using more electricity generators in parallel way is more economical than using a single high-power generator, taking into account the frequency and efficiency of economic generator. But the problem of multiple generators in parallel is uneven distribution of power, which is researched in the paper, and finally rectifier Parallel flow control system is adopted to achieve power balance.In the main loop, the bridge rectifier circuit is used to commute the three-phase AC of each inverter generator output. We designed the control system based on PIC18F2320 chip, used the Hall sensor to collect branch current and used A/D converter module to transform the current signal. We used the fuzzy PID algorithm processing, with suitable PWM output to drive the IGBT gate signal to complete power balance. Peripherals modules include:power module, the analog input section, the main loop, PWM output protection circuits and other auxiliary components.Experimental tests show that the inverter generators in parallel flow controllers were able to achieve flow control.更多还原