【作者】 杨春稳；

【导师】 李志刚；

【作者基本信息】 河北工业大学 ， 电机与电器， 2011， 博士

【摘要】 煤矿掘进工作面因停电故障造成的停风问题是影响煤矿安全的重大课题,通过提高掘进工作面局部通风的安全可靠性,可有效防止瓦斯积存,避免矿井瓦斯爆炸事故,从而实现煤矿生产的本质安全型。但由于煤矿井下环境恶劣、供电线路易潮湿和设备易受到挤压、砸碰等不利因素的存在,使得风机、供电线路、开关等都有可能出现故障,所以不能完全避免煤矿掘进工作面停电停风现象的发生,致使工作面可能积存瓦斯,发生瓦斯爆炸事故。为了解决煤矿掘进工作面因停电故障造成的停风问题,本课题设计并研发了掘进工作面局部风机应急供电系统,当矿井出现停电停风时能迅速恢复通风,保证工作面连续供风,防止因停电停风而造成瓦斯积存或爆炸事故。其核心部分为矿用隔爆型660V大功率三相应急电源,用于应急备用风机供电,在正常供风系统发生停电停风故障时能自动实现应急供风,以保证生产过程的安全平稳运行。本课题主要研究内容如下:1、研究开发隔爆型高压蓄电池组,并对高压蓄电池组充电控制方式、充电参数优化进行研究。应急电源的控制回路与备用风机起动器作成一体,封装在一个防爆箱中;PLC控制单元检测电网是否正常供电和给EPS供电电池进行充电,通过对控制方法的设计保证高压蓄电池组均衡充电。2、研究矿用短时工作制隔爆型逆变器。为了满足恶劣的井下环境,本课题研究开发矿用短时工作制隔爆型逆变器,电压幅值可达660V。对于逆变电路,采用全控型器件IGBT组成的逆变电路,在DSP控制下进行工作,交流性能大幅度提高,能够达到我国矿用电机需要的电源质量的标准,可在断电的情况下较长时间供电。3、研究应急系统自动切换装置和通风机匹配关系。通风机的状态作为监控装置监测的一个量,在其改变时,会进行开关动作,进行应急电源供电。4、针对煤矿特殊供电要求研究开发整体掘进工作面停电应急供风系统。更多还原

【Abstract】 It is a great subject that the wind stopping problem produced by power failure in the dig working face of coal mine, which will influence the coal mine safety. It could effectively prevent methane accumulation and avoid gas explosion accidents by improving the safety and reliability of local ventilation of the dig working face in coal mine system, then realizing the intrinsically safe of coal mine safety in production. But at the same time, it is impossible that avoiding all the faults for ventilator, line of power supply and switch and so on because the existing of adverse factors such as atrocious conditions, easier to dap of the power supply line, extrusion and drop of the equipments, so it could not avoid completely power fault and wind stopping phenomenon which will cause methane accumulation and gas explosion accidents in dig working face of coal mine.To solve the problem of underground tunneling face failure which is due to the power failure. The project design and develop a local ventilation system for heading face for emergency power outages. This system can ensure rapid recovery ventilation when the mine appears power fault and air cutting phenomenon, and also could ensure the lasting wind offering if the working face to avoid gas accumulation or explosion caused by the stopping of wind and electricity .The core part is flameproof Three-phase Emergency Power Supplied by 660V.It is used for offering electricity to meet the emergency stand-by ventilator. At the same time it could automatically supply emergency air when the normal air supply system stops and offering the electricity to ensue safety and stable operation of production process.The main research contents as follows:1、Study and develop flameproof high-voltage battery, research the control mode、parameters optimization in charging of high-voltage battery, it is a overall that the control circuit of EPS and starter of stand-by fans, which enclosed in a explosion-proof box. The PLC control unit testes the power supply is normal or not and charge for the EPS battery, ensures equilibrium charging of high voltage battery through the control method designed.2、Research the flameproof inverter of mine short-time duty. In order to satisfy the bad environment of coal mine, study and develop the flameproof inverter of mine short-time duty. The Voltage amplitude could reach 660v. As for inverter circuits, the communication performance greatly raised and could reach our power quality standards needed for mine motors if the inverter circuits composed of IGBT which called all-controlling device working under the DSP control and for a long time in the situation when power fault.3、Research the matching relation between automatic switching device and the ventilator state in emergency system. As one variable of monitoring device for the ventilators, when the ventilator state is changing, the switch will carry on action, and then the emergency power supply begin to work.4、Study and develop emergency wind supply system for overall dig working face in coal mine aiming at the special coal mine power supply requirements.更多还原