A dual power supply replacement system and gas system

Abstract

The present invention provides a dual power supply replacement system and a gas system, which relate to the field of gas technology. The dual power supply replacement system described in the present invention is used for important low-voltage loads in the gas system. The dual power supply replacement system includes a switching panel and a feeder panel. The feeder panel is used to distribute the power supply provided by the switching panel to each of the important low-voltage loads; the switching panel includes a main power switch, a backup power switch and a dual power supply replacement device. The main power switch is connected to the main power supply of the important low-voltage load, and the backup power switch is connected to the backup power supply of the important low-voltage load. The dual power supply replacement device is connected to the main power switch and the backup power switch respectively, and the dual power supply replacement device is used to control the on and off of the main power switch and the backup power switch. The technical solution described in the present invention can meet the needs of continuous production of the gas system and realize the safe and reliable operation of the gas system.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical engineering, and in particular to a dual power supply replacement system and a gas system. Background Art

[0002] The gas system of a metallurgical enterprise is the heart and artery of the enterprise's production system. Important low-pressure loads play a vital role in the gas system and are the key to the safe operation of metallurgical enterprises.

[0003] In actual use, the gas system has the following main problems: (1) Existing gas system substations are designed as unmanned substations, and the low-voltage load does not have the function of automatically switching on after power failure. Once the low-voltage power fails, patrol personnel are required to rush to the site to restore power, and the power outage lasts for a long time. (2) Due to the continuous nature of gas system production, it is not possible to carry out long-term power outages. In addition, after the low-voltage system is transformed into a standby automatic switch, the operating risk is extremely high. If the standby automatic switch fails, it will cause the low-voltage load of the entire gas system to collapse. Therefore, this transformation plan is technically difficult and the transformation cost is high. (3) Important low-voltage load switching devices need to have the characteristics of continuous and reliable operation to meet the maintenance-free and intelligent operation requirements of unmanned substations, but the current gas system cannot meet these requirements.

[0004] The above problems result in the gas system being unable to operate in a safe and reliable environment. When important low-voltage loads lose power, it may cause the PLC control system to be paralyzed, the gas compressor to be damaged, the gas release system to lose control, and the gas tank cabinet adjustment system to lose control, which may seriously threaten the safe operation of the gas system. Summary of the invention

[0005] The problem solved by the present invention is how to realize safe and reliable operation of the gas system.

[0006] In order to solve the above problems, the present invention provides a dual power supply replacement system for important low-voltage loads in a gas system, wherein the dual power supply replacement system comprises a switching panel and a feeder panel, wherein the feeder panel is used to distribute the power supply provided by the switching panel to each of the important low-voltage loads; the switching panel comprises a main power switch, a backup power switch and a dual power supply replacement device, wherein the main power switch is connected to the main power supply of the important low-voltage load, and the backup power switch is connected to the backup power supply of the important low-voltage load, and the dual power supply replacement device is respectively connected to the main power switch and the backup power switch, and the dual power supply replacement device is used to control the on and off of the main power switch and the backup power switch.

[0007] The dual power supply replacement system described in the present invention, by setting up a dual power supply replacement system including a switching panel and a feeder panel, can centrally group the important low-voltage loads of the gas system, and can transform the existing gas system without changing the original low-voltage system. At the same time, the dual power supply replacement device of the switching panel can realize continuous power supply to the important low-voltage loads, which can meet the needs of continuous production of the gas system and realize safe and reliable operation of the gas system.

[0008] Optionally, the dual power supply switching device includes an AC analog quantity acquisition module, a central processing unit module and a signal module. The AC analog quantity acquisition module is used to acquire analog signals and convert the analog signals into digital signals through AD conversion. The central processing unit module is used to analyze and judge based on the digital signals to generate processing signals. The signal module is used to generate control instructions based on the processing signals to control the on and off of the main power switch and the backup power switch according to the control instructions.

[0009] The dual power supply replacement system described in the present invention collects field analog signals through an AC analog quantity acquisition module, generates processing signals through a central processing unit module, and finally generates control instructions through a signal module to control the on and off of a main power switch and a backup power switch, thereby achieving continuous power supply to important low-voltage loads.

[0010] Optionally, the dual power supply replacement device further includes a human-machine interface module, and the human-machine interface module is used to receive the digital signal sent by the AC analog quantity acquisition module and send the digital signal to a remote control room.

[0011] The dual power supply replacement system of the present invention realizes interaction with the remote control room through the human-machine interface module, which is beneficial for the on-duty dispatching personnel to perform real-time monitoring and control, thereby realizing safe and reliable operation of the gas system.

[0012] Optionally, the human-machine interface module communicates with the remote control room using the Modbus communication protocol.

[0013] The dual power supply replacement system of the present invention uses Modbus communication protocol to communicate between the human-machine interface module and the remote control room, which is beneficial for on-duty dispatching personnel to perform real-time monitoring and control, thereby achieving safe and reliable operation of the gas system.

[0014] Optionally, the line where the main power switch is located is provided with a first voltage transformer and a first current transformer, and the line where the backup power switch is located is provided with a second voltage transformer and a second current transformer, the first voltage transformer and the second voltage transformer are respectively used to detect the voltage and frequency of the line, and send the voltage and the frequency to the AC analog quantity acquisition module, the first current transformer and the second current transformer are respectively used to detect the current of the line, and send the current to the AC analog quantity acquisition module.

[0015] The dual power supply replacement system described in the present invention sets a voltage transformer and a current transformer on the line where the main power switch is located and the line where the backup power switch is located, collects current, voltage and frequency signals and sends them to the dual power supply replacement device, so that the dual power supply replacement device controls the on and off of the switch according to the real-time signal, thereby realizing continuous power supply to important low-voltage loads, meeting the needs of continuous production of the gas system and realizing safe and reliable operation of the gas system.

[0016] Optionally, the feeder panel includes an alarm device and an important load feeder drawer circuit, the important load feeder drawer circuit is used to supply power to the important low-voltage load, and the alarm device is used to send an alarm signal when the important load feeder drawer circuit fails.

[0017] The dual power supply replacement system of the present invention provides a feeder panel including an alarm device and an important load feeder drawer circuit. When a failure of the important load feeder drawer circuit occurs, an alarm is sounded through the alarm device, thereby achieving safe and reliable operation of the gas system.

[0018] Optionally, the switching panel and the feeder panel are fully insulated structures.

[0019] The dual power supply replacement system of the present invention realizes safe and reliable operation of the gas system by setting the switching panel and the feeder panel as a fully insulated structure.

[0020] Optionally, the switching panel comprises a cable room, in which a plurality of cables and a heater are arranged, the switching panel is connected to the busbar via the cables, and the heater is used to heat the cable room.

[0021] The dual power supply replacement system of the present invention prevents the low-voltage cabinet from vibrating or the foundation from sinking and affecting its safe operation by arranging stranded cables and heaters in the cable room, and prevents the occurrence of water vapor condensation, thereby achieving safe and reliable operation of the gas system.

[0022] The present invention also provides a gas system, including an important low-pressure load and the above-mentioned dual power supply replacement system.

[0023] Optionally, the important low-pressure loads include the gas tank emergency relief pipe electric valve power supply, the gas tank inlet and outlet valve power supply, the compressor outlet combination valve power supply, the gas relief tower power supply, the UPS power supply and the synthetic gas butterfly valve power supply.

[0024] The advantages of the gas system of the present invention and the dual power supply replacement system described above over the prior art are the same, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a dual power supply switching system according to an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the action logic of the dual power supply switching device according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the screen layout of the dual power supply switching system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a dual power supply replacement system for important low-voltage loads in a gas system, wherein the dual power supply replacement system comprises a switching panel and a feeder panel, wherein the feeder panel is used to distribute the power supply provided by the switching panel to each of the important low-voltage loads; the switching panel comprises a main power switch, a backup power switch and a dual power supply replacement device, wherein the main power switch is connected to the main power supply of the important low-voltage load, and the backup power switch is connected to the backup power supply of the important low-voltage load, and the dual power supply replacement device is respectively connected to the main power switch and the backup power switch, and the dual power supply replacement device is used to control the on and off of the main power switch and the backup power switch.

[0030] Specifically, in this embodiment, the dual power supply relay system includes a switching panel (also called an incoming line cabinet) and a feeder panel (also called a feeder cabinet). The switching panel provides 380V power supply for important loads, and the feeder panel distributes it to each important low-voltage load according to load requirements.

[0031] Combination Figure 2As shown, the main power supply (#1 incoming line) and the backup power supply (2# incoming line) are taken from the busbars of section I and section II of the low-voltage cabinet of the gas station respectively. When the main power fails, the switching panel can automatically detect the fault state and distinguish the fault type. After confirming that the external power fails, the main power supply is automatically disconnected and quickly switched to the backup power supply to ensure the continuity of power supply to important loads; when it is confirmed that it is an internal fault, it is automatically locked to prevent the accident from expanding. The switching panel can automatically detect voltage, current, frequency, and fault signals, and upload them to the control room. 1QF and 2QF are the main power switch and backup power switch of the switching panel, which are backup for each other, and their opening and closing operations are controlled by the microcomputer intelligent dual power supply relay device.

[0032] Combination Figure 3 As shown, the cabinet is a GCS drawer cabinet (GCS type low voltage fixed partition cabinet), cabinet 1 is a dual power switching panel, the first 16E drawer from top to bottom in the panel is the incoming line 1 switch 1QF, the second 16E drawer is the incoming line 2 switch 2QF, the third 16E drawer is a microcomputer intelligent dual power supply replacement device, the fourth 16E drawer is a spare drawer circuit, and the fifth 8E interval is installed with a control pressure plate. Cabinets 2 and 3 are feeder panels, and the panels from top to bottom are the sound and light alarm interval, the important load feeder drawer circuit, and the spare drawer circuit.

[0033] Among them, the normal operation mode of the existing low-voltage load is split operation, that is, the low-voltage one-stage incoming line switch runs with one stage of busbar, the low-voltage two-stage incoming line switch runs with two-stage busbar, and the low-voltage bus tie switch is in the disconnected state. The normal operation mode of the superior power supply system is also split operation mode. When the superior power supply system is still in split operation, it is prohibited to close the low-voltage side, that is, the low-voltage one and two-stage incoming line switches, and the bus tie switches cannot be closed at the same time. When any section of the low-voltage busbar of the low-voltage power supply system of the gas system loses power, it must be manually confirmed that the fault is due to external reasons, and the incoming line switch of the power-lost busbar is disconnected, and then the low-voltage bus tie switch is closed to restore the power supply of the power-lost busbar. Therefore, the low-voltage load bus tie switch does not have the function of automatic input after power failure, and patrol personnel need to rush to the scene to restore power supply. In this embodiment, by setting up a dual power supply replacement system, the backup automatic input function of important low-voltage loads is realized, which can meet the needs of continuous production of the gas system.

[0034] Each capacity level circuit is equipped with a spare circuit. When a fault occurs in the operating circuit drawer, the on-duty personnel can use the spare drawer to replace it online to ensure power supply continuity. Figure 3 As shown, in the dual power switching panel, one spare drawer circuit with specification 16E and capacity of 320A is equipped according to capacity. In the feeder panel, two spare drawer circuits with specification 8E / 2 and capacity of 25A, two spare drawer circuits with specification 8E / 2 and capacity of 12.5A, and one spare drawer circuit with specification 8E and capacity of 100A are equipped according to drawer specifications and capacity.

[0035] In this embodiment, by setting up a dual power supply replacement system including a switching panel and a feeder panel, the important low-voltage loads of the gas system are centralized and grouped together, so that the existing gas system can be modified without changing the original low-voltage system. At the same time, the dual power supply replacement device of the switching panel can realize continuous power supply to the important low-voltage loads, which can meet the needs of continuous production of the gas system and realize safe and reliable operation of the gas system.

[0036] Optionally, the dual power supply switching device includes an AC analog quantity acquisition module, a central processing unit module and a signal module. The AC analog quantity acquisition module is used to acquire analog signals and convert the analog signals into digital signals through AD conversion. The central processing unit module is used to analyze and judge based on the digital signals to generate processing signals. The signal module is used to generate control instructions based on the processing signals to control the on and off of the main power switch and the backup power switch according to the control instructions.

[0037] Specifically, in this embodiment, the dual power supply replacement device includes a power supply module (for power supply), an AC analog quantity acquisition module, a central processing unit (CPU) module and a signal module. The AC analog quantity acquisition module collects analog quantity signals such as voltage, current and frequency on site, performs AD conversion and sends the signals to the central processing unit (CPU) module for analysis and judgment, and then sends the processed signals to the signal module. The signal module then issues a command (control instruction) to cause the circuit breakers of the main power supply and the backup power supply of the switching panel to perform a switching operation, thereby controlling the on and off of the main power switch and the backup power switch to achieve continuous power supply to important low-voltage loads.

[0038] In this embodiment, the field analog signal is collected by the AC analog acquisition module, and then the processing signal is generated by the central processing unit module. Finally, the control instruction is generated by the signal module to control the on and off of the main power switch and the backup power switch to achieve continuous power supply to important low-voltage loads.

[0039] Optionally, the dual power supply replacement device further includes a human-machine interface module, and the human-machine interface module is used to receive the digital signal sent by the AC analog quantity acquisition module and send the digital signal to a remote control room.

[0040] Specifically, in this embodiment, the dual power supply renewal device also includes a human-machine interface module, which implements interaction with the remote control room and uploads the operating status of the dual power supply renewal device (the operating status is reflected by the digital signal sent by the AC analog quantity acquisition module) to the remote control room in real time for real-time monitoring and control by the on-duty dispatching personnel.

[0041] In this embodiment, the interaction with the remote control room is achieved through the human-machine interface module, which is beneficial for the on-duty dispatching personnel to perform real-time monitoring and control, thereby achieving safe and reliable operation of the gas system.

[0042] Optionally, the human-machine interface module communicates with the remote control room using the Modbus communication protocol.

[0043] Specifically, in this embodiment, the human-machine interface module uses two communication modes, network and serial port, to communicate with the host computer using the Modbus communication protocol. The collected telemetry, telesignaling, and fault signals are uploaded to the remote control room for operation monitoring by the on-duty personnel.

[0044] The Modbus protocol is a master / slave protocol. There is one node that is the master node, and the other nodes that participate in the communication using the Modbus protocol are slave nodes. Each slave device has a unique address. In serial and MB+ networks, only the node designated as the master node can initiate a command. Modbus allows multiple (approximately 240) devices to be connected to the same network for communication, so multiple GCS drawers can be monitored in real time in a remote control room.

[0045] In this embodiment, by setting up the Modbus communication protocol for communication between the human-machine interface module and the remote control room, it is beneficial for the on-duty dispatching personnel to perform real-time monitoring and control, thereby achieving safe and reliable operation of the gas system.

[0046] Optionally, the line where the main power switch is located is provided with a first voltage transformer and a first current transformer, and the line where the backup power switch is located is provided with a second voltage transformer and a second current transformer, the first voltage transformer and the second voltage transformer are respectively used to detect the voltage and frequency of the line, and send the voltage and the frequency to the AC analog quantity acquisition module, the first current transformer and the second current transformer are respectively used to detect the current of the line, and send the current to the AC analog quantity acquisition module.

[0047] Specifically, in this embodiment, combined with Figure 2 As shown, UL1 and UL2 are line 1 and line 2 voltage transformers, respectively, for detecting line voltage and frequency; IL1 and IL2 are line 1 and line 2 current transformers, respectively, for detecting line current; Uab, Ubc, and Uca are three-phase bus voltages detected by the 380V bus voltage transformer.

[0048] The voltage transformer and current transformer send the collected current, voltage and frequency signals to the dual power supply replacement device, which performs detection, analysis and judgment. If it is confirmed that the power is lost externally, the dual power supply replacement device automatically switches to the backup power supply quickly and accurately to ensure the continuity of power supply. If it is confirmed that the power is lost due to internal reasons of the dual power supply replacement device, it will be immediately locked to prevent the accident from expanding, and a fault alarm signal will be issued. Specifically: During normal operation, 1QF is in the closed position, and the incoming line 1 supplies power to the 380V bus through 1QF. The 2QF switch of the incoming line 2 is in the open position, and the 1QF and 2QF switches form a backup for each other. After the device is powered on, the line voltage and bus voltage are qualified, and there is no incoming line fault. The device starts charging. After charging for 10 seconds, the charging is completed and the system begins to enter the fault monitoring state. If the incoming line 1 fails, the incoming line 2 and bus voltages are qualified, then the 1QF switch is closed to ensure normal power supply. If the incoming line 2 fails, the incoming line 1 and bus voltages are qualified, then the 2QF switch is closed to ensure normal power supply. If the detection does not satisfy the above logic, the device is locked.

[0049] In this embodiment, voltage transformers and current transformers are arranged on the lines where the main power switch and the backup power switch are located, and current, voltage, and frequency signals are collected and sent to the dual power supply relay device, so that the dual power supply relay device controls the on and off of the switch according to real-time signals, thereby realizing continuous power supply to important low-voltage loads, meeting the needs of continuous production of the gas system, and realizing safe and reliable operation of the gas system.

[0050] Optionally, the feeder panel includes an alarm device and an important load feeder drawer circuit, the important load feeder drawer circuit is used to supply power to the important low-voltage load, and the alarm device is used to send an alarm signal when the important load feeder drawer circuit fails.

[0051] Specifically, in this embodiment, combined with Figure 3 As shown, cabinets 2 and 3 are feeder panels, and from top to bottom in the panel are the sound and light alarm interval (alarm device), important load feeder drawer circuit, and standby drawer circuit. The feeder panel distributes the 380V power supply after the switch panel is switched to each important load according to the load demand. The feeder panel is equipped with a sound and light alarm device. When any feeder load fails, an sound and light alarm is issued and the fault normally open (normally closed) contact signal is uploaded to the switch panel.

[0052] In this embodiment, a feeder panel including an alarm device and an important load feeder drawer circuit is provided, and an alarm is given by the alarm device when a failure occurs in the important load feeder drawer circuit, thereby achieving safe and reliable operation of the gas system.

[0053] Optionally, the switching panel and the feeder panel are fully insulated structures.

[0054] Specifically, in this embodiment, the switch panel and feeder panel are fully insulated structures, and fully consider factors such as load capacity, heat dissipation, moisture, dust, vibration, etc. to ensure that the equipment is not affected by environmental factors. In terms of load capacity, taking into account the later expansion and operation safety, the load capacity of the incoming and feeder switches is increased by 30%. The cabinet protection level is IP4X, the cabinet door is equipped with a heat dissipation grid and a dust filter, the busbar is covered with a flame-retardant insulating heat shrink tubing, and a heat dissipation insulating protective cover is installed.

[0055] In this embodiment, the switching panel and the feeder panel are set to a fully insulated structure, so as to achieve safe and reliable operation of the gas system.

[0056] Optionally, the switching panel comprises a cable room, in which a plurality of cables and a heater are arranged, the switching panel is connected to the busbar via the cables, and the heater is used to heat the cable room.

[0057] Specifically, in this embodiment, the incoming line cabinet uses multi-strand soft copper cables to connect to the busbars of the gas station low-voltage cabinet section I and section II to prevent the low-voltage cabinet from vibrating or the foundation from sinking and affecting its safe operation. A plate-type anti-condensation heater is installed in the cable room to prevent condensation.

[0058] In this embodiment, by arranging strands of cables and heaters in the cable room, the low-voltage cabinet is prevented from vibrating or the foundation sinking to affect its safe operation, and condensation of water vapor is prevented, thereby achieving safe and reliable operation of the gas system.

[0059] Another embodiment of the present invention provides a gas system, including an important low-pressure load and the dual power supply switching system.

[0060] Specifically, in this embodiment, the gas system includes important low-voltage loads and the above-mentioned dual power supply replacement system. Among them, the application scenarios of the gas system include high-coke gas storage and distribution stations, converter gas storage and distribution stations, and coke oven gas storage and distribution stations.

[0061] Optionally, the important low-pressure loads include the gas tank emergency relief pipe electric valve power supply, the gas tank inlet and outlet valve power supply, the compressor outlet combination valve power supply, the gas relief tower power supply, the UPS power supply and the synthetic gas butterfly valve power supply.

[0062] Specifically, in this embodiment, important low-voltage loads include the electric valve power supply of the emergency release pipe of the gas tank, the power supply of the inlet and outlet valves of the gas tank, the power supply of the pressure machine outlet combination valve, the power supply of the gas release tower, the UPS power supply and the power supply of the synthetic gas butterfly valve. The power failure of the above-mentioned important low-voltage loads will cause the PLC control system to be paralyzed, the gas pressure machine to be damaged, the gas release system to be out of control, the gas tank cabinet adjustment system to be out of control, and other dangerous accidents that seriously threaten the safe operation of the gas system. Through the above-mentioned dual power supply replacement system, the safe and reliable operation of the gas system is achieved.

[0063] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A dual power supply replacement system, characterized in that: For important low-voltage loads of the gas system, the dual power supply replacement system includes a switching panel and a feeder panel, and the feeder panel is used to distribute the power supply provided by the switching panel to each of the important low-voltage loads; The switching panel includes a main power switch, a backup power switch and a dual power supply replacement device. The main power switch is connected to the main power supply of the important low-voltage load, the backup power switch is connected to the backup power supply of the important low-voltage load, and the dual power supply replacement device is connected to the main power switch and the backup power switch respectively. The dual power supply replacement device is used to control the on and off of the main power switch and the backup power switch; the switching panel is used to detect the fault state to distinguish the fault type when the main power supply of the important low-voltage load loses power. When the fault type is external power failure, the switching panel is used to cut off the connection with the main power supply of the important low-voltage load through the main power switch, and establish a connection with the backup power supply of the important low-voltage load through the backup power switch. When the fault type is an internal fault, the switching panel is automatically locked.

2. The dual power supply switching system according to claim 1, characterized in that: The dual power supply replacement device includes an AC analog quantity acquisition module, a central processing unit module and a signal module. The AC analog quantity acquisition module is used to collect analog signals and convert the analog signals into digital signals through AD conversion. The central processing unit module is used to analyze and judge based on the digital signals to generate processing signals. The signal module is used to generate control instructions based on the processing signals to control the on and off of the main power switch and the backup power switch according to the control instructions.

3. The dual power supply replacement system according to claim 2, characterized in that: The dual power supply replacement device also includes a human-machine interface module, which is used to receive the digital signal sent by the AC analog quantity acquisition module and send the digital signal to a remote control room.

4. The dual power supply replacement system according to claim 3, characterized in that: The human-machine interface module communicates with the remote control room using the Modbus communication protocol.

5. The dual power supply replacement system according to claim 2, characterized in that: The line where the main power switch is located is provided with a first voltage transformer and a first current transformer, and the line where the backup power switch is located is provided with a second voltage transformer and a second current transformer. The first voltage transformer and the second voltage transformer are respectively used to detect the voltage and frequency of the line, and send the voltage and the frequency to the AC analog quantity acquisition module, and the first current transformer and the second current transformer are respectively used to detect the current of the line, and send the current to the AC analog quantity acquisition module.

6. The dual power supply switching system according to claim 1, characterized in that: The feeder panel includes an alarm device and an important load feeder drawer circuit, wherein the important load feeder drawer circuit is used for supplying power to the important low-voltage load, and the alarm device is used for sending an alarm signal when the important load feeder drawer circuit fails.

7. The dual power supply replacement system according to any one of claims 1 to 6, characterized in that: The switching panel and the feeder panel are fully insulated structures.

8. The dual power supply replacement system according to claim 7, characterized in that: The switching panel comprises a cable room, in which a plurality of cables and a heater are arranged, the switching panel is connected to a busbar via the cables, and the heater is used for heating the cable room.

9. A gas system, characterized in that: It comprises an important low-voltage load and the dual power supply replacement system as described in any one of claims 1 to 8.

10. The gas system according to claim 9, characterized in that: The important low-voltage loads include the power supply for the electric valve of the gas tank emergency release pipe, the power supply for the gas tank inlet and outlet valves, the power supply for the compressor outlet combination valve, the power supply for the gas release tower, the UPS power supply and the power supply for the synthetic gas butterfly valve.

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