CN203119338U - Power equipment for skid-mounted natural gas liquefaction device - Google Patents
Power equipment for skid-mounted natural gas liquefaction device Download PDFInfo
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- CN203119338U CN203119338U CN 201320066737 CN201320066737U CN203119338U CN 203119338 U CN203119338 U CN 203119338U CN 201320066737 CN201320066737 CN 201320066737 CN 201320066737 U CN201320066737 U CN 201320066737U CN 203119338 U CN203119338 U CN 203119338U
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Abstract
The utility model relates to power equipment for a skid-mounted natural gas liquefaction device, which comprises a skid body and a casing connected onto the slid body, wherein four independent sealed spaces, i.e., a high voltage chamber, a transformer chamber, a low voltage chamber and an equipment control chamber, sequentially connected by power cables are arranged in the casing. Two 10kV high-voltage inlet wire switch cabinets, one PT cabinet, two high-voltage outlet wire switch cabinets and one high-voltage metering cabinet are arranged in the high-voltage chamber; a 10kV to 0.4kV transformer is arranged in the transformer chamber, a low-voltage inlet wire switch cabinet, a low-voltage reactive power compensation cabinet and a low-voltage outlet wire switch cabinet are arranged in the low-voltage chamber; and a high-voltage motor control cabinet, a high-voltage reactive compensative cabinet, a frequency conversion control driving cabinet, a pump control cabinet and a distributed controller cabinet are arranged in the equipment control chamber. The power equipment for the skid-mounted natural gas liquefaction device integrates high/low voltage power distribution, metering, protection and motor driving, and is compact in structure, flexible in movement, and convenient for concentrated management and maintenance.
Description
Technical field
The utility model relates to power set, refers in particular to a kind of power-equipment for sledge dress type natural gas liquefaction device.
Background technology
Natural gas is a kind of high-quality, clean resource, has very tempting development prospect in fields such as the energy, traffic.Be storage, the transportation that makes things convenient for natural gas, and reduce equipment cost that improve security of system, people have developed natural gas liquefaction device.Natural gas liquefaction device is divided into three kinds on base load type, peak regulation type and sledge dress type.The base load type refers to produce for local and uses or outer defeated large-scale liquefying plant; The peak regulation type refers to for the peak regulation load or replenishes the medium-sized natural gas liquefaction device of winter fuel supply; Sledge dress type refers to the small-scaled natural gas liquification device into NGV aerating, development and use outlying little gas field, oil well residual gas and biogas.
Because sledge dress type natural gas liquefaction device adopts modularized design, apparatus structure compactness, site operation amount are little, need civil engineering hardly, therefore possess easy accessibility, mobility is good, advantage such as are fit to how to reuse.For saving installing space, maintaining easily and manage, reduce the site operation amount, and feeding makeup puts power-equipment such as refrigerant compressor, air-cooled heat exchanger, lean pump, cold pump etc. reliable and stable electrical source of power is provided, and needs the centralized sledge dress type power set supporting with sledge dress type natural gas liquefaction device badly.
Summary of the invention
The purpose of this utility model is to provide a kind of power-equipment of sledge dress type natural gas liquefaction device, and this power-equipment and sledge dress type natural gas liquefaction device are supporting, and reliable and stable electrical source of power can be provided.
For achieving the above object, the utility model provides a kind of power-equipment for sledge dress type natural gas liquefaction device, this power-equipment comprises: the sledge body, be connected in the casing on the described sledge body, be provided with independently seal cavity of four of hyperbaric chamber, transformer room, low-pressure chamber and PCO plant control offices in the described casing, described hyperbaric chamber, transformer room, low-pressure chamber and PCO plant control office are linked in sequence by power cable;
Be provided with 2 10kV high pressure service entrance switch cabinets, 1 PT cabinet, 2 high-voltage terminal switch cubicles and 1 high-voltage metering cubicle in the described hyperbaric chamber;
Described transformer room is provided with the 10kV high pressure changes the 0.4kV transformer;
Described low-pressure chamber is provided with low pressure service entrance switch cabinet, low voltage reactive power compensation cabinet and low pressure outlet switch cubicle;
Described PCO plant control office is provided with high-voltage motor control cubicle, high-pressure reactive compensation cabinet, variable frequency control driving cabinet, pump control cubicle and distributed director cabinet;
Described 2 10kV high pressure incoming line cabinets connect 2 road 10kV electric power incoming lines respectively, described 2 road 10kV electric power incoming lines accumulate 1 laggard PT cabinet of bus, be divided into two branches from the bus of PT cabinet output, branch is connected with primary side that described 10kV high pressure changes the 0.4kV transformer in a laggard transformer room of high-voltage terminal cabinet, and another branch is through the high-voltage motor control cubicle of another high-voltage terminal cabinet to the PCO plant control office; The secondary side outlet that described 10kV high pressure changes the 0.4kV transformer connects low pressure service entrance switch cabinet, low pressure outlet switch cubicle and low-voltage reactive power power power back-off cabinet successively.
In technique scheme, described 10kV high pressure service entrance switch cabinet is provided with dual power supply automatic switching device and computer integrated protection.
In technique scheme, be provided with the voltage transformer summation current transformer in the described PT cabinet.
In technique scheme, be provided with the metering device of three-phase accumulative total active electrical degree, reactive power compensation electric degree and accumulative total switching frequency, accumulative total interruption duration in the described high-voltage metering cubicle.
In technique scheme, it is hermetically sealed oil-filled transformer that described 10kV changes the 0.4kV transformer, and is provided with pressure protective device.
In technique scheme, described low pressure service entrance switch cabinet is provided with electric energy instrument.
In technique scheme, described low voltage reactive power compensation cabinet is provided with automatic switching and manual switching device.
In technique scheme, described high-voltage motor control cubicle and high-pressure reactive compensation cabinet are provided with the relay that the control refrigerant compressor opened/stop and characterized the refrigeration compressor motor state.
In technique scheme, described PCO plant control office is provided with 2 variable frequency control cabinets, every control cubicle is provided with 3 frequency converters, 1 motor of every Frequency Converter Control, each motor is provided with and starts/stop control and 4～20mA frequency modulation loop, and frequency converter exchanges inlet wire and is connected to described low pressure outlet cabinet, and outlet is connected to on-the-spot explosion-proof wiring case, described startup/stop control loop being connected to on-the-spot explosive operation post, described 4～20mA frequency modulation loop is connected to DCS analog signal output.
In technique scheme, described distributed director cabinet is provided with data acquisition interface and RS485 MODBUS RTU interface, described data acquisition interface is connected to each transducer of dynamical system or relay by the multiple twin shielded type cable, and described RS485 MODBUS RTU interface is connected to the DCS communication interface by multiple twin shielding communication cable.
Compared with prior art, the utility model has the following advantages for the power-equipment of sledge dress type natural gas liquefaction device:
1, integrate high and low voltage electric distribution, metering, protection and motor-driven, compact conformation, flexibly mobile, be convenient to centralized management and maintenance;
2, the equipment cable is default in the sledge, does not rely on field working conditions, significantly reduces the site operation amount;
3, adopt standard sledge assembling structure, convenient transportation is particularly suitable for the sledge dress type liquefying plant of high maneuverability.
Description of drawings
Fig. 1 is used for the outside schematic diagram of the power-equipment of sledge dress type natural gas liquefaction device for the utility model;
Fig. 2 is used for the structural representation of inner each device of power-equipment of sledge dress type natural gas liquefaction device for the utility model;
Among the figure, 1, H shaped steel; 2, plane steel plate; 3, casing; 4, hyperbaric chamber; 5, transformer room; 6, low-pressure chamber; 7, PCO plant control office; 8, high pressure incoming line cabinet; 9, PT cabinet; 10, metering cabinet; 11, high-voltage terminal cabinet; 12, transformer; 13 low pressure service entrance switch cabinets; 14, low pressure outlet switch cubicle; 15, low voltage reactive power compensation cabinet; 16, Frequency Converter Control drives cabinet; 17, pump control cubicle; 18, distributed director cabinet; 19, high-pressure reactive compensation cabinet; 20, high-voltage motor control cubicle.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the power-equipment that is used for sledge dress type natural gas liquefaction device comprises sledge body and casing 3, and casing 3 is made for the rock wool filled board, and casing 3 is connected on the sledge body by bolt.The sledge body is welded by H shaped steel 1 and plane steel plate 2.
As shown in Figure 2, isolate four independently confined spaces by stainless steel materials in the casing 3, respectively as hyperbaric chamber 4, transformer room 5, low-pressure chamber 6 and PCO plant control office 7, each confined space is provided with to be installed and access door.Hyperbaric chamber 4, transformer room 5, low-pressure chamber 6 and PCO plant control office 7 are linked in sequence by power cable.
The hyperbaric chamber 4 of present embodiment is equipped with 2 high pressure incoming line cabinets 8,2 high- voltage terminal cabinets 11,1 PT cabinet 9 and 1 metering cabinet 10.2 high pressure incoming line cabinets 8 connect 2 road 10kV electric power incoming lines respectively, accumulate 1 laggard PT cabinet 9 of bus, the bus that comes out from PT cabinet 9 is divided into two branches, the transformer 12 of branch in a high-voltage terminal cabinet 8 laggard transformer rooms 5, another branch is through the high-voltage motor control cubicle 20 of another high-voltage terminal cabinet 8 to the PCO plant control office 7.PT cabinet 9 is measured voltage and the electric current of 10kV outlet by voltage, current transformer.Metering cabinet 10 is used for metering three-phase accumulative total active electrical degree, reactive power compensation electric degree and accumulative total switching frequency, accumulative total interruption duration.
Transformer 12 in the transformer room 5 changes the 0.4kV transformer for the 10kV high pressure, and 10kV commentaries on classics 0.4kV transformer used in the present embodiment is hermetically sealed oil-filled transformer, and is provided with pressure protective device.1 high-voltage terminal cabinet 11 outlet of a side joint of transformer 12, the secondary side outlet connects low pressure incoming line cabinet 13, low pressure outlet cabinet 14 and low voltage reactive power compensation cabinet 15 successively.
Low-pressure chamber 6 is provided with low pressure service entrance switch cabinet 13, low voltage reactive power compensation cabinet 15 and low pressure outlet switch cubicle 14; Low pressure outlet switch cubicle 14 buses are divided into a plurality of branches, enter PCO plant control office 7 on the one hand, low-tension supply is provided on the other hand other supplement production facility, illuminator, control room, low voltage reactive power compensation cabinet 15 is in parallel with load motor, can obviously improve the bearing power factor, reduce power transmission loss.
PCO plant control office 7 is provided with high-voltage motor control cubicle 20, high-pressure reactive compensation cabinet 19, Frequency Converter Control driving cabinet 15, pump control cubicle 17 and distributed director cabinet 18.
PCO plant control office 7 is provided with 1 high-pressure reactive compensation cabinet 19,2 high-voltage motor control cubicles 20,2 Frequency Converter Control driving 16,1 pump control cubicles 17 of cabinet and 1 distributed director cabinet 18.Because compressor adopts a sledge two-shipper secondary compressibility, therefore need to adopt 2 high-voltage motor control cubicles, 20 control electric motor startings/stop, high-pressure reactive compensation cabinet 19 is used for improving the high-voltage motor power factor (PF).2 frequency converters drive control cubicle 16 3 frequency converters respectively are installed, and every frequency converter comprises that 6 are detected control or drive the loop:
1) 380VAC loop.Inlet wire is from low-pressure chamber low pressure outlet cabinet, and outlet connects on-the-spot motor;
2) frequency converter frequency modulation loop.Frequency converter receives Central Control Room controller 4～20mA current signal, control 380VAC output frequency, and 4mA represents 0Hz, 20mA represents 50Hz, the proportional relation of electric current and frequency;
3) electric motor starting loop.Execute-in-place post start button is coupled with starting the loop, and when start button was pressed, motor started with given frequency;
4) motor stop loop.Execute-in-place post stop button and stop loop coupling, when stop button was pressed, motor was shut down.In addition, the relay normally-closed contact side that is used for power failure machine far away is connected serially to stop loop, and when coil gets when electric, the contact disconnects, and motor is shut down;
5) state-detection loop.The A.C. contactor auxiliary contact insert the Central Control Room controller as status signal and detect the loop, characterize motor operating state;
6) MODBUS order circuit.With fixed protocol form and the communication of Central Control Room controller, the feedback motor frequency signal constitutes the frequency modulation loop to frequency converter, improves the control procedure quality as slave.
Claims (10)
1. power-equipment that is used for sledge dress type natural gas liquefaction device, it is characterized in that, comprise the sledge body, be connected in the casing on the described sledge body, be provided with independently seal cavity of four of hyperbaric chamber, transformer room, low-pressure chamber and PCO plant control offices in the described casing, described hyperbaric chamber, transformer room, low-pressure chamber and PCO plant control office are linked in sequence by power cable;
Be provided with 2 10kV high pressure service entrance switch cabinets, 1 PT cabinet, 2 high-voltage terminal switch cubicles and 1 high-voltage metering cubicle in the described hyperbaric chamber;
Described transformer room is provided with the 10kV high pressure changes the 0.4kV transformer;
Described low-pressure chamber is provided with low pressure service entrance switch cabinet, low voltage reactive power compensation cabinet and low pressure outlet switch cubicle;
Described PCO plant control office is provided with high-voltage motor control cubicle, high-pressure reactive compensation cabinet, variable frequency control driving cabinet, pump control cubicle and distributed director cabinet;
Described 2 10kV high pressure incoming line cabinets connect 2 road 10kV electric power incoming lines respectively, described 2 road 10kV electric power incoming lines accumulate 1 laggard PT cabinet of bus, be divided into two branches from the bus of PT cabinet output, branch is connected with primary side that described 10kV high pressure changes the 0.4kV transformer in a laggard transformer room of high-voltage terminal cabinet, and another branch is through the high-voltage motor control cubicle of another high-voltage terminal cabinet to the PCO plant control office; The secondary side outlet that described 10kV high pressure changes the 0.4kV transformer connects low pressure service entrance switch cabinet, low pressure outlet switch cubicle and low voltage reactive power compensation cabinet successively.
2. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that: described 10kV high pressure service entrance switch cabinet is provided with dual power supply automatic switching device and computer integrated protection.
3. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that: be provided with the voltage transformer summation current transformer in the described PT cabinet.
4. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that: the metering device that is provided with three-phase accumulative total active electrical degree, reactive power compensation electric degree and accumulative total switching frequency, accumulative total interruption duration in the described high-voltage metering cubicle.
5. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that it is hermetically sealed oil-filled transformer that described 10kV changes the 0.4kV transformer, and is provided with pressure protective device.
6. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that: described low pressure service entrance switch cabinet is provided with electric energy instrument.
7. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that: described low voltage reactive power compensation cabinet is provided with automatic switching and manual switching device.
8. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that described high-voltage motor control cubicle and high-pressure reactive compensation cabinet are provided with the relay that the control refrigerant compressor opened/stop and characterized the refrigeration compressor motor state.
9. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that, described PCO plant control office is provided with 2 variable frequency control cabinets, every control cubicle is provided with 3 frequency converters, 1 motor of every Frequency Converter Control, each motor is provided with and starts/stop control and 4～20mA frequency modulation loop, frequency converter exchanges inlet wire and is connected to described low pressure outlet switch cubicle, outlet is connected to on-the-spot explosion-proof wiring case, described startup/stop control loop being connected to on-the-spot explosive operation post, described 4～20mA frequency modulation loop is connected to DCS analog signal output.
10. according to the described power-equipment for sledge dress type natural gas liquefaction device of claim 1, it is characterized in that, described distributed director cabinet is provided with data acquisition interface and RS485 MODBUS RTU interface, described data acquisition interface is connected to each transducer or relay in the power-equipment by the multiple twin shielded type cable, and described RS485 MODBUS RTU interface is connected to the DCS communication interface by multiple twin shielding communication cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066737 CN203119338U (en) | 2013-02-05 | 2013-02-05 | Power equipment for skid-mounted natural gas liquefaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066737 CN203119338U (en) | 2013-02-05 | 2013-02-05 | Power equipment for skid-mounted natural gas liquefaction device |
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| Publication Number | Publication Date |
|---|---|
| CN203119338U true CN203119338U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320066737 Expired - Lifetime CN203119338U (en) | 2013-02-05 | 2013-02-05 | Power equipment for skid-mounted natural gas liquefaction device |
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| Country | Link |
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| CN (1) | CN203119338U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952627A (en) * | 2016-06-16 | 2016-09-21 | 中石化石油工程机械有限公司第四机械厂 | Grid-driven electric control device for skid-mounted pump |
| CN108224898A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | A kind of prying gas reliquefaction installation |
-
2013
- 2013-02-05 CN CN 201320066737 patent/CN203119338U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952627A (en) * | 2016-06-16 | 2016-09-21 | 中石化石油工程机械有限公司第四机械厂 | Grid-driven electric control device for skid-mounted pump |
| CN108224898A (en) * | 2018-01-16 | 2018-06-29 | 中科睿凌江苏低温设备有限公司 | A kind of prying gas reliquefaction installation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |