CN205783568U - A kind of converter station valve hall air conditioning system switching device - Google Patents

Abstract

The utility model relates to a switching device for an air-conditioning system in a valve hall of a converter station. The air-conditioning system is composed of an air-cooled vortex modular cold/hot water unit, an air handling unit, an air supply pipe and a return air pipe. Two sets of air handling units The power inlet end of the power supply is connected through the first dual-power automatic transfer switch, the power inlet ends of the two sets of circulating water pumps are connected through the second dual-power automatic transfer switch, and the two dual-power automatic transfer switches are connected to the main control system of the air conditioning system. The utility model realizes automatic switching and manual switching of two groups of air handling units and circulating water pumps, which greatly improves the degree of automation of the air-conditioning system in the valve hall of the converter station, ensures the reliable operation of the air-conditioning system, and greatly reduces equipment maintenance and operation Reduce the workload of personnel and eliminate the hidden dangers of equipment failure caused by human error.

Description

A switching device for an air conditioning system in a valve hall of a converter station

technical field

The utility model relates to the technical field of air-conditioning system operation control, in particular to a switching device for an air-conditioning system in a valve hall of a converter station.

Background technique

Usually, the converter station is equipped with multiple valve halls, and each valve hall is equipped with multiple converter valve towers. The valve hall air-conditioning system is an important auxiliary equipment for the safe and stable operation of the DC converter station. The main function of the valve hall air-conditioning system is Have:

1) When the DC system is running normally, the converter valve will generate a lot of heat. Although the valve water cooling system takes away most of the heat, the converter valve will still emit a lot of heat to the valve hall; in order to ensure the normal operation of electrical equipment In operation, the valve hall must be cooled; in winter, when the converter valve is out of operation and the outdoor temperature is very low, it is necessary to increase the indoor temperature to ensure that the electrical equipment will not be damaged by freezing;

2) In order to ensure that no flashover occurs during the operation of the converter valve, the relative humidity in the valve hall needs to be controlled to a certain extent;

3) In order to prevent outdoor dust from entering the valve hall, the valve hall needs to be kept clean, and a slight positive pressure should be maintained in the valve hall.

The air handling unit and circulating water pump in the air conditioning system of the valve hall of the converter station are divided into two systems, A and B, one for work and one for standby. If a single system runs for a long time, faults such as motor bearing overheating and wear, belt breakage, and water leakage from the circulating water pump will occur, which will increase the maintenance workload and reduce the service life of the equipment, which will cause the valve hall air-conditioning system to work unstable.

In order to avoid premature failure of one system due to long-term operation, the two-unit air-conditioning unit must be switched regularly. At present, most of the air-conditioning units in the valve halls of converter stations in China are put into operation relatively early, and the degree of automation of the equipment is not high, and manual switching is required every time. Manual switching operation increases the number of required equipment maintenance and operation personnel and the frequency of personnel inspections, and the operation is cumbersome; as the operating life increases, the operation and maintenance cost will be greatly increased, and equipment damage will also be caused by improper human operation.

Utility model content

The utility model provides a switching device for an air-conditioning system in a valve hall of a converter station. Two groups of air handling units and circulating water pumps can realize automatic switching and manual switching, which greatly improves the degree of automation of the air-conditioning system in a valve hall of a converter station and ensures that the air-conditioning The reliable operation of the system greatly reduces the workload of equipment maintenance and operation personnel, and eliminates the hidden danger of equipment failure caused by human error.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A switching device for an air-conditioning system in a valve hall of a converter station. The air-conditioning system is composed of an air-cooled vortex modular cold/hot water unit, an air handling unit, an air supply pipe, and a return air pipe. The air handling units are divided into groups A and B. , one worker and one standby; the air-cooled vortex modular cold/hot water unit is connected to two groups of air handling units through circulating water pipes, and circulating water pump A and circulating water pump B are installed on the circulating water pipes; the two groups of air handling units are respectively The air-conditioning air supply outlet in the valve hall of the converter station is connected through the air supply pipe, and the air-conditioning return air outlet in the valve hall of the converter station is connected through the return air pipe; the power inlet terminals of the two groups of air handling units are connected through a dual power automatic switching switch , The power inlet terminals of the 2 groups of circulating water pumps are connected through the dual power automatic transfer switch two, and the 2 dual power automatic transfer switches are connected to the main control system of the air conditioning system.

The power supply control terminals of the group A air handling unit, the B group air handling unit, the circulating water pump A, and the circulating water pump B are respectively connected to manual switching buttons, and the manual switching buttons are linked, and the manual switching buttons are set on the operation panel. The corresponding setting display lights below the two manual switching buttons.

The main control system of the air-conditioning system is provided with an alarm module, and the alarm module is respectively connected to a display screen and an alarm.

Compared with the prior art, the beneficial effects of the utility model are:

1) It can realize the automatic switching and manual switching of the main equipment of the air-conditioning system in the valve hall of the converter station, which greatly improves the degree of automation and prolongs the service life of the equipment;

2) When a fault occurs during equipment operation or switching, the operator will be notified of the location and status of the faulty equipment in a timely and accurate manner through an alarm to improve the operating reliability of the air-conditioning system in the valve hall;

3) Eliminate the possibility of human misoperation, avoid equipment loss caused by it, reduce the workload of maintenance and operation personnel, and improve the work efficiency of operation and maintenance personnel.

Description of drawings

Fig. 1 is a structural schematic diagram of a switching device for an air-conditioning system in a valve hall of a converter station according to the present invention.

Fig. 2 is a logic principle block diagram when realizing periodic automatic switching in the utility model.

In the figure: 1. Air-cooled vortex modular cold/hot water unit 2. Group A air handling unit 3. Group B air handling unit 4. Circulating water pump A 5. Circulating water pump B 6. Dual power automatic switching switch 7. Dual Power automatic switching switch 2 8. Valve hall of converter station 9. Main control system of air conditioning system

detailed description

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the utility model is a switching device for the air conditioning system in the valve hall of the converter station. The air handling units are set up in groups A and B, one for work and one for standby; the air-cooled vortex modular cold/hot water unit is connected to the two groups of air handling units respectively through circulating water pipes, and circulating water pumps A and circulating water are set on the circulating water pipes correspondingly. Water pump B; 2 groups of air handling units are respectively connected to the air-conditioning air supply outlet in the valve hall of the converter station through the air supply pipe, and connected to the air-conditioning return air outlet in the valve hall of the converter station through the return air pipe; the power inlet lines of the 2 groups of air handling units The terminals are connected through the first dual power automatic transfer switch, the power inlet terminals of the two sets of circulating water pumps are connected through the second dual power automatic transfer switch, and the two dual power automatic transfer switches are connected to the main control system of the air conditioning system.

The power supply control terminals of the group A air handling unit, the B group air handling unit, the circulating water pump A, and the circulating water pump B are respectively connected to manual switching buttons, and the manual switching buttons are linked, and the manual switching buttons are set on the operation panel. The corresponding setting display lights below the two manual switching buttons.

The main control system of the air-conditioning system is provided with an alarm module, and the alarm module is respectively connected to a display screen and an alarm.

The operation method when using the switching device of the air-conditioning system in the valve hall of the converter station described in the utility model is as follows:

In order to reduce the impact of long-term operation of a single air-handling unit on its service life, the two sets of air-handling units 2 and 3 need to be switched regularly in turn to keep a group of air-handling units 2/3 in working condition, and the corresponding circulating water pump 4 /5 synchronous switching; the specific method is: connect the power inlet terminals of the two groups of air handling units 2 and 3 through the dual power automatic switch-6, and connect the power inlet terminals of the two groups of circulating water pumps 4 and 5 through the dual power supply Automatic transfer switch two 7 are connected, and 2 dual-power automatic transfer switches 6,7 are connected to the main control system 9 of the air-conditioning system; Record the running time of 2/3 of a group of air handling units switched to the working state. The set running time is 100 to 200 hours. When the single running time of 2/3 of the air handling units reaches the set running time, the switch is issued Instructions are given to the dual-power automatic switchover switch 1, 6 pairs of air handling units 2/3 for automatic switching, and at the same time, a switching command is given to the dual-power automatic switchover switch 2, 7 pairs of circulating water pumps 4/5 for synchronous switching;

The power control terminals of group A air handling unit 2, group B air handling unit 3, circulating water pump A4, and circulating water pump B5 are respectively equipped with manual switching buttons, and the manual switching buttons are linked, that is, group A air handling unit 2 switches to work In the state, the air handling unit 3 of group B automatically stops running, and at the same time the circulating water pump A4 starts, and the circulating water pump B5 stops; the corresponding manual switching button indicator of the equipment switched to the working state is on;

The main control system 9 of the air-conditioning system detects the operation status of the air handling unit 2 of group A, the air handling unit 3 of group B, the circulating water pump A4 and the circulating water pump B5 at any time, and immediately switches the standby equipment to the working state when any of them fails , and stop the operation of the faulty device; before the fault is rectified, the current device will continue to run without being limited by the set running time.

The main control system 9 of the air-conditioning system is provided with an alarm function. When any equipment in the group A air handling unit 2, the B group air handling unit 3, the circulating water pump A4 or the circulating water pump B5 breaks down, or cannot be switched normally, the alarm will be displayed on the display screen. The prompt on the pop-up window and the alarm sound give an alarm at the same time, and display the location of the fault.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (3)

1. A switching device for an air-conditioning system in a valve hall of a converter station, the air-conditioning system is composed of an air-cooled vortex modular cold/hot water unit, an air handling unit, an air supply pipe and a return air pipe, and the air handling unit is composed of Group A and Group B, one worker and one standby; the air-cooled vortex modular cold/hot water unit is connected to two groups of air handling units through circulating water pipes, and circulating water pump A and circulating water pump B are installed on the circulating water pipes; 2 groups of air handling units The units are respectively connected to the air-conditioning air supply outlet in the valve hall of the converter station through the air supply pipe, and connected to the air-conditioning return air outlet in the valve hall of the converter station through the return air pipe; The power supply automatic switch one is connected, the power inlet terminals of the 2 sets of circulating water pumps are connected through the dual power supply automatic switch two, and the two dual power supply automatic switch are connected to the main control system of the air conditioning system. 2. The switching device for the air-conditioning system in the valve hall of a converter station according to claim 1, the power supply control terminals of the group A air handling unit, the B group air handling unit, the circulating water pump A, and the circulating water pump B are respectively connected to manual switching button, and the linkage between each manual switching button, the manual switching button is set on the operation panel, and the corresponding display light is set under each manual switching button. 3. The switching device for an air-conditioning system in a valve hall of a converter station according to claim 1, wherein the main control system of the air-conditioning system is provided with an alarm module, and the alarm module is respectively connected to a display screen and an alarm.