锅炉房供电系统高压电源的选择.doc

锅炉房供电系统高压电源的选择

供热锅炉房工程直接关系到普通百姓的正常生活，它的重要性是显而易见的；另外，由于在系统正常运行时，如果系统停电，直接威胁外网供水管路的安全，所以根据当地的实际情况，该系统采用双回10kv电源，一回运行，一回备用。

Heating boiler room project is directly related to the normal life of the common people, its importance is obvious; In addition, due to the system during normal operation, if the system outage, direct threat to the safety of water supply pipes network, so according to local actual situation, the system USES double 10 kv power supply, one run, one standby. 

　　3 低压供电系统方案的确定

3 the scheme determination of low voltage power supply system 

　　3.1 负荷初步统计

3.1 load  preliminary statistics

　　补偿前各设备组的计算负荷

Before the compensation calculation load of each equipment set

　　一号锅炉的计算负荷为773.2 kw；二号锅炉的计算负荷为773.2 kw；公共部分的计算负荷为330.65 kw。

Computational load of boiler no. 1 to 773.2 kw; No. 2 boiler in the computational load of 773.2 kw; The public part of the calculation load is 330.65 kw. 

　　3.2 初步确定低压供电系统方案

3.2 preliminary determine  low-voltage power supply system

　　由于锅炉房系统运行本身的高可靠性，要求系统在一台炉故障或供电系统部分故障等严重的情况下，应保证不造成大的经济损失，并能维持系统最基本的运行。如在全部或部分锅炉故障的情况下，最基本的要求是要保证水循环系统的正常运行，否则有冻坏管路的危险，造成的损失可能是无法弥补的。反应在供电系统方面，就需要选用两台变压器分列运行的系统，并设置联络开关，这样，在一台变压器故障的情况下，另一台变压器可保证供暖系统最基本的运行。另外考虑到每台锅炉系统运行的可靠性，每台锅炉的负荷应由一台变压器供电。

Due to the high reliability of the boiler system operation for system failure or a power supply system in a furnace parts under severe conditions such as fault, shall ensure that do not cause large economic loss, and can maintain the basic operation system. As in the case of all or part of the boiler failure, the most basic requirement is to guarantee the normal operation of the water cycle system, or are in danger of freezing pipes, the cause of the loss may be irreparable. Response in terms of power supply system, you need to choose two transformers were operating system, and set up the contact switch, so, in the case of a transformer fault, the other a transformer can guarantee the operation of heating system is the most basic. Also considering the per boiler system running reliability, per boiler load should be powered by a transformer. 

　　3.3 负荷统计及变压器的选择并确定低压供电系统

3.3 the load statistics and the choice of transformer and low voltage power supply system were determined. 

　　根据以上的思想及负荷的初步统计结果，按两台变压器进行负荷计算，一台变压器（一号变压器）负责一号锅炉的供电，另一台变压器（二号变压器）负责二号锅炉的供电。公共部分的负荷由原有的一台变压供电。无功补偿采用自动补偿屏。

According to the above thoughts and the preliminary results of load, load calculation according to two transformer, a transformer transformer (1) is responsible for boiler no. 1 power supply, another transformer (transformer 2) is responsible for no. 2 boiler of the power supply. The public part of the load from the original a variable pressure power supply. Reactive power compensation using automatic compensation. 

　　由此可见，选用两台变压器分列同时运行，并互为备用的方案，满足生产过程中对供电系统可靠性的要求。具体见下图“锅炉房供电系统图”。

So, choose two transformers were running at the same time, as spare and solutions, to meet the requirements of the production process of power system reliability. Specific see chart "boiler room power supply system diagram". 

　　4 高压供电系统方案的确定

The scheme determination of 4 high voltage power supply system. 

　　由前述可知，锅炉房高压供电采用双回10kv电源，一用一备，选用两台变压器，变压器同时分列运行。因此，高压供电系统可采用以下系统，见“高压配电系统图”。

By the foregoing, the high voltage power supply adopts double boiler room 10 kv power supply, one with a ready, choose two transformer, transformer were run at the same time. High voltage power supply system can use the following system, therefore, see "high-voltage power distribution system diagram". 

　　5 控制系统供电

5 power supply control system. 

　　本锅炉房控制系统包括手动控制和自动控制。手动控制是指操作人员根据安装在仪表盘上的二次仪表显示数据并经过分析对锅炉系统实施的控制。酱油自动控制是指dcs系统根据安装在现场的一次仪表返回的数据对系统进行分析并实施对设备的控制。因此，控制系统供电包括控制台（仪表盘）供电系统和dcs控制系统的供电。

The boiler control system including manual control and automatic control. Manual control is refers to the operating personnel according to the secondary instrument installed in the dashboard display data and through analysis of the control of the boiler system implementation. Automatic control is refers to the DCS system according to the installation in the field of an instrument data returned by the analysis of the system and implementation of control of the equipment. Therefore, the control system power supply including the console (instrument panel) power supply system and power supply of DCS control system. 

　　为了使锅炉系统运行更合理，维护更方便，并满足锅炉系统运行高可靠性的要求，在设计控制部分的供电系统时，应考虑以下几点：

In order to make the boiler system is more reasonable, more convenient maintenance, and meet the requirements of boiler system runs with high reliability, in the design of control part of the power supply system, consideration should be given to the following: 

　　（1）当任意一台锅炉停止运行时，应保证其它至少一台锅炉系统的正常运行或水循环系统的最基本运行，所以所有锅炉设备电源及其控制电源不应取自同一段母线，见“锅炉房供电系统图”。 

(1) when any stop running boilers, shall ensure that at least one other normal running of boilers or the basic operation of the water circulation system, so all the boiler equipment power supply and its control power supply should not be taken from the same period of bus bar, see "boiler room power supply system diagram". 

　　（2）当任意一台变压器或任意一段母线故障时，不应影响其它母线上设备的正常运行，所以每一台锅炉设备电源与其控制电源应取自同一段母线，且两段母线之间应加装母联柜。

(2) when any a transformer or any period of busbar fault, should not affect the normal operation of the equipment on other bus, so each boiler equipment power supply and its control power supply shall be taken from the same period of bus bar, and between two bus is equipped with the cabinet. 

　　（3）为了增加控制系统的可靠性，同时在某一台锅炉停止运行时，控制系统仍然能对其各种参数进行监视，就需要从其它母线上引第二电源，作为该锅炉控制系统电源的后备电源。

(3) in order to increase the reliability of the control system, at one stop running boilers at the same time, still can monitor various parameters to its control system, you need to lead a second power supply from the other bus, as a backup power supply of the boiler control system power supply. 

　　（4）为了保证dcs系统的正常运行，dcs供电系统应增设ups电源。

(4) in order to guarantee the normal operation of DCS system, DCS should add a ups power supply system power supply. 

　　（5）任何一台锅炉的任意一个参数的一次测量仪表、二次测量仪表应取自同一个电源，且应使用同一个保护元件保护。如某一台锅炉的风门调节系统，手操器、调节器和执行器应由一个电源供电，山东锅炉并采用一个熔断器保护。具体见下图“风门控制系统供电系统图”。

(5) any any parameters of a boiler primary instrument and secondary instrument should be taken from the same power supply, and should use the same protection components. Such as throttle regulating system of a boiler, hand operator, regulator and actuator shall be controlled by a power supply, and use a fuse protection. Specific see chart "throttle control system of power supply system diagram". 

　　（6）电机等动力设备由单独控制电源统一供电，同一系统的设备控制电源应为一个，且取自同一个回路。如锅炉燃烧系统中的鼓风机、引风机和炉排电机的控制电源应为一个，且接自同一个熔断器（或自动开关）。

(6) motor is controlled by a separate power supply, power plants such as device control power source should be a same system, and from the same loop. Such as fan, induced draft fan of boiler combustion system and control power supply should be a grate motor, and the same fuse (or automatic switch). 

　　综上所述，为了保证锅炉系统运行的高可靠性，在设计锅炉房控制部分的供电系统时，应综合考虑在不同条件下的具体情况。在设计实践中,具体设计时应根据不同的锅炉类型、工艺过程具体考虑。

To sum up, in order to guarantee the high reliability of the system operation, in the design of boiler plant control part of the power supply system, should be considered in different conditions. In design practice, the specific design according to the different type of boiler, concrete consideration process. 