发电厂凝结水泵变频调速系统设计与应用
发布时间：2018-09-17 20:34
【摘要】：我国现正处于高速发展阶段,能源开发和利用也处于高速增长阶段,高效利用和节约能源已经成为当代中国急需解决的重大问题。随着我国推进经济结构的调整和发展方式的转变,电力体制改革逐步实行竞价上网。这要求电力企业一方面努力降低发电耗能与成本,另一方面加大脱硫、除尘等设备投入,严格降低污染排放。然而为提高上网电价竞争力,厂用电的节能见效快,适应当今环境与能源的需求,具有举足轻重意义。随着高压变频调速技术的发展,发电厂风机、水泵类用电设备也开始使用变频调速,从而有效降低发电耗能与成本。 新疆阿拉尔盛源电厂新建两台350MW超临界空冷火电机组,电厂汽机侧除氧器采用高压凝结水泵上水。本文以阿拉尔盛源电厂的高压凝结水泵的变频调速系统设计为研究背景,通过分析系统节能原理及高压变频器原理,给出了高压凝结水泵变频调速系统设计,并在阿拉尔盛源电厂项目中运行实施。具体如下： 首先,分析了高压电机变频调速方式及高压凝结水泵变频节能的原理,根据凝泵工作原理,其流量和扬程与电机转速之间存在一定的关系,当机组负荷降低时,凝泵流量下降,此时如能通过变频调节电机转速随之下降,则可以有效降低能耗,节约能源。 其次,以凝结水泵变频调速运行为背景,对凝泵变频系统整体结构和主要元器件进行选型比较,得到系统高压变频器实际应用选型,详细介绍了所选北京合康亿盛变频器的主体结构、变频特性和控制运行方式。 再次,针对阿拉尔盛源电厂高压凝结水泵系统的工艺控制要求,设计了一套高压变频器系统实施方案,并且变频电源具有冗余特性,即在变频器出现故障情况时,可自动将变频电源切换成工频电源,从而使机组的正常运转。对变频调速系统进行性能测试,满足工艺运行控制要求,并简要介绍变频器柜的操作方法。 综上所述,为了满足工艺需求和节能减排两个方面,变频节能首当其冲,成为最佳选择。阿拉尔盛源热电厂经过一年多的运行,凝结水泵高压变频系统节能效果显著,该系统降低了经济成本和后续设备维护成本,水泵振动和噪声也得到明显改善,提高了水泵的效率和自动化水平,受到了用户的欢迎。
[Abstract]:Our country is in the high speed development stage, the energy development and utilization is also in the high speed growth stage, the high efficiency utilization and the saving energy already becomes the important question which the contemporary China urgently needs to solve. Along with the adjustment of economic structure and the change of development mode, the electric power system reform has been carried out step by step. This requires electric power enterprises to reduce energy consumption and cost of power generation on the one hand, and increase the input of desulfurization and dust removal equipment on the other, so as to strictly reduce pollution emissions. However, in order to improve the competitiveness of electricity price, it is of great significance to save energy and adapt to the demand of environment and energy. With the development of high voltage frequency conversion speed regulation technology, power plant fans and pump power equipment also began to use frequency conversion speed regulation, thus effectively reducing the energy consumption and cost of power generation. Two 350MW supercritical air-cooled thermal power units have been built in Xinjiang Alar Shengyuan Power Plant. The steam turbine side deaerator of the power plant uses high pressure condensate water pump to feed water. In this paper, based on the design of variable frequency speed regulation system of high pressure condensate pump in Ala'er Shengyuan Power Plant, by analyzing the principle of energy saving and high voltage frequency converter, the design of variable frequency speed regulation system of high pressure condensate pump is given. And in the Alar Shengyuan power plant project operation implementation. The main contents are as follows: firstly, the paper analyzes the frequency conversion speed regulation mode of high voltage motor and the principle of high voltage condensing pump. According to the working principle of condensing pump, there is a certain relationship between the flow rate and the head and the speed of the motor. When the load of the unit is reduced, the flow rate of the condensing pump decreases, and if the motor speed can be adjusted by frequency conversion, the energy consumption can be reduced and energy can be saved. Secondly, based on the background of variable frequency speed regulation of condensate pump, the whole structure and main components of variable frequency system of condensate pump are selected and compared, and the practical application selection of high voltage converter is obtained. The main structure, frequency conversion characteristic and control operation mode of Beijing Hekang Yisheng inverter are introduced in detail. Thirdly, according to the process control requirements of the high voltage condensate pump system in Alar Shengyuan Power Plant, a set of implementation scheme of high voltage inverter system is designed, and the frequency conversion power supply has the redundancy characteristic, that is, when the frequency converter is out of order, Frequency conversion power can be automatically switched to power frequency power supply, so that the normal operation of the unit. The performance test of frequency conversion speed regulating system is carried out to meet the requirements of process operation and the operation method of inverter cabinet is introduced briefly. In conclusion, in order to meet the process demand and energy saving and emission reduction, frequency conversion energy saving is the first choice. After more than a year of operation, the condensate pump high-voltage frequency conversion system has remarkable energy-saving effect, which reduces the economic cost and the maintenance cost of the follow-up equipment, and the pump vibration and noise are obviously improved. It improves the efficiency and automation of the pump, and is welcomed by the users.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM621
本文编号：2247014
[Abstract]:Our country is in the high speed development stage, the energy development and utilization is also in the high speed growth stage, the high efficiency utilization and the saving energy already becomes the important question which the contemporary China urgently needs to solve. Along with the adjustment of economic structure and the change of development mode, the electric power system reform has been carried out step by step. This requires electric power enterprises to reduce energy consumption and cost of power generation on the one hand, and increase the input of desulfurization and dust removal equipment on the other, so as to strictly reduce pollution emissions. However, in order to improve the competitiveness of electricity price, it is of great significance to save energy and adapt to the demand of environment and energy. With the development of high voltage frequency conversion speed regulation technology, power plant fans and pump power equipment also began to use frequency conversion speed regulation, thus effectively reducing the energy consumption and cost of power generation. Two 350MW supercritical air-cooled thermal power units have been built in Xinjiang Alar Shengyuan Power Plant. The steam turbine side deaerator of the power plant uses high pressure condensate water pump to feed water. In this paper, based on the design of variable frequency speed regulation system of high pressure condensate pump in Ala'er Shengyuan Power Plant, by analyzing the principle of energy saving and high voltage frequency converter, the design of variable frequency speed regulation system of high pressure condensate pump is given. And in the Alar Shengyuan power plant project operation implementation. The main contents are as follows: firstly, the paper analyzes the frequency conversion speed regulation mode of high voltage motor and the principle of high voltage condensing pump. According to the working principle of condensing pump, there is a certain relationship between the flow rate and the head and the speed of the motor. When the load of the unit is reduced, the flow rate of the condensing pump decreases, and if the motor speed can be adjusted by frequency conversion, the energy consumption can be reduced and energy can be saved. Secondly, based on the background of variable frequency speed regulation of condensate pump, the whole structure and main components of variable frequency system of condensate pump are selected and compared, and the practical application selection of high voltage converter is obtained. The main structure, frequency conversion characteristic and control operation mode of Beijing Hekang Yisheng inverter are introduced in detail. Thirdly, according to the process control requirements of the high voltage condensate pump system in Alar Shengyuan Power Plant, a set of implementation scheme of high voltage inverter system is designed, and the frequency conversion power supply has the redundancy characteristic, that is, when the frequency converter is out of order, Frequency conversion power can be automatically switched to power frequency power supply, so that the normal operation of the unit. The performance test of frequency conversion speed regulating system is carried out to meet the requirements of process operation and the operation method of inverter cabinet is introduced briefly. In conclusion, in order to meet the process demand and energy saving and emission reduction, frequency conversion energy saving is the first choice. After more than a year of operation, the condensate pump high-voltage frequency conversion system has remarkable energy-saving effect, which reduces the economic cost and the maintenance cost of the follow-up equipment, and the pump vibration and noise are obviously improved. It improves the efficiency and automation of the pump, and is welcomed by the users.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM621
【参考文献】
相关期刊论文 前3条
1 贾贵玺,高跃,贺家李,张臣堂;高压变频调速技术在发电厂节能方面的研究与应用[J];电力系统自动化;2002年14期
2 陈永汉;吴淑娟;郭耀泉;;我国变频技术的发展潜力研究[J];商业时代;2009年31期
3 张猛;;变频调速技术在现代火力发电厂中的应用[J];中国新技术新产品;2009年18期
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