CN103248061A - Low-voltage reactive power compensation power distribution cabinet - Google Patents

Low-voltage reactive power compensation power distribution cabinet Download PDF

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Publication number
CN103248061A
CN103248061A CN2013101905020A CN201310190502A CN103248061A CN 103248061 A CN103248061 A CN 103248061A CN 2013101905020 A CN2013101905020 A CN 2013101905020A CN 201310190502 A CN201310190502 A CN 201310190502A CN 103248061 A CN103248061 A CN 103248061A
Authority
CN
China
Prior art keywords
reactive power
control
cabinet
compensation
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013101905020A
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Chinese (zh)
Inventor
李振玺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YINCHUAN LIHENG ELECTRIC EQUIPMENT CO Ltd
Original Assignee
YINCHUAN LIHENG ELECTRIC EQUIPMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YINCHUAN LIHENG ELECTRIC EQUIPMENT CO Ltd filed Critical YINCHUAN LIHENG ELECTRIC EQUIPMENT CO Ltd
Priority to CN2013101905020A priority Critical patent/CN103248061A/en
Publication of CN103248061A publication Critical patent/CN103248061A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

Abstract

The invention provides a low-voltage reactive power compensation power distribution cabinet, comprising a primary loop and a secondary control loop which are arranged in a cabinet body, wherein the primary loop comprises an input isolation switch, a first bus bar, a second bus bar, a breaker, an output isolation switch, a reactive power compensation control switch, a reactive power compensation device, a phase loss detecting device and a control device, the lower-port moving contact of the breaker is connected with the upper-port static contact of the output isolation switch and the upper-port static contact of the reactive power compensation control switch respectively through the second bus bar, the reactive power compensation device is connected with the lower-port moving contact of the reactive power compensation control switch, the input end of the phase loss detecting device is connected with a low-voltage incoming line of a power supply, and the control device is connected with the output end of the phase loss detecting device, the reactive power compensation control switch and the reactive power compensation device and is used for automatically controlling the switching work of the reactive power compensation device and controlling the reactive power compensation control switch to be switched between a connected state and a disconnected state according to detection results provided by the phase loss detecting device.

Description

The low-pressure reactive compensation power distribution cabinet
Technical field
The present invention relates to the power supply technique field, particularly a kind of low-pressure reactive compensation power distribution cabinet.
Background technology
Low-voltage distribution cabinet is applicable to transformer station, power plant, industrial and mining enterprises etc., throw light on and usefulness that the electric energy dress of distribution changes and controls as power with the distribution system that exchanges 50Hz, rated voltage 380V.
Be power supply quality, minimizing loss, the raising utilization rate of equipment and installations that improves low-voltage distribution cabinet; in low-voltage distribution cabinet, can adopt capacitor reactive power device to carry out reactive power compensation; yet the compensation effect of existing low-voltage distribution cabinet with no-power compensation function is unsatisfactory, can not adjust reactive power compensation and protection reactive power compensator dynamically at the variation of electric network source and the component variation of low-voltage distribution cabinet self.
Summary of the invention
In view of this, provide a kind of low-pressure reactive compensation power distribution cabinet that can adjust reactive power compensation at the component variation of the variation of electric network source and low-voltage distribution cabinet self dynamically.
A kind of low-pressure reactive compensation power distribution cabinet, comprise cabinet and be installed in cabinet interior primary circuit and secondary control loop, the primary circuit comprises the input isolating switch, first bus row, second bus row, circuit breaker, the output isolating switch, the reactive power compensation control switch, reactive power compensator, phase shortage checkout gear and control device, the low pressure inlet wire of power supply is connected to the fixed contact suitable for reading of input isolating switch, the end opening moving contact of input isolating switch is connected with the fixed contact suitable for reading of circuit breaker by first bus row, the end opening moving contact of circuit breaker is connected with the fixed contact suitable for reading of output isolating switch and the fixed contact suitable for reading of reactive power compensation control switch respectively by second bus row, the end opening moving contact of described output isolating switch is used for being connected with load, described reactive power compensator is connected with the end opening moving contact of reactive power compensation control switch, the input of phase shortage checkout gear is connected with the low pressure inlet wire of power supply, the output of control device and phase shortage checkout gear, reactive power compensation control switch and reactive power compensator connect, control device is used for the switching work of control reactive power compensator, and the testing result control reactive power compensation control switch that also is used for providing according to the phase shortage checkout gear is in closure, disconnect the switching of two kinds of operating states; Described secondary control loop comprises earth leakage protective loop, closing circuit, trip(ping) circuit, short-circuit protector and earth leakage protective device; the input of earth leakage protective loop, closing circuit, trip(ping) circuit and earth leakage protective device is connected with the low pressure inlet wire of power supply by short-circuit protector respectively, and the output of earth leakage protective loop, closing circuit, trip(ping) circuit and earth leakage protective device is connected with the end opening moving contact of circuit breaker respectively.
In the above-mentioned low-pressure reactive compensation power distribution cabinet; the end opening moving contact of circuit breaker is connected with the fixed contact suitable for reading of output isolating switch and the fixed contact suitable for reading of reactive power compensation control switch respectively by second bus row; reactive power compensator is connected with the end opening moving contact of reactive power compensation control switch; the input of phase shortage checkout gear is connected with the low pressure inlet wire of power supply; the output of control device and phase shortage checkout gear; reactive power compensation control switch and reactive power compensator connect; control device is controlled the switching work of reactive power compensator automatically; so when the component variation of the variation of electric network source and low-voltage distribution cabinet self, dynamically adjust reactive power compensation; the testing result that control device also provides according to the phase shortage checkout gear is controlled the reactive power compensation control switch in closure; disconnect the switching of two kinds of operating states to guarantee that reactive power compensator can excise timely when the phase shortage situation takes place, to reach the purpose of protection reactive power compensator.
Description of drawings
Fig. 1 is the functional block diagram of the low-pressure reactive compensation power distribution cabinet of a preferred embodiments.
Fig. 2 is the functional block diagram of reactive power compensator among Fig. 1.
Fig. 3 is the structural representation of the cabinet of Fig. 1 mesolow reactive power compensation power distribution cabinet.
Fig. 4 is cold plate structural representation among Fig. 3.
Among the figure: low-pressure reactive compensation power distribution cabinet 10; cabinet 200; horizontal dividing plate 201; sidewall 202; heat dissipation wind channel 203; cold plate 204; loading plate 2041; thermoelectric semiconductor cooling assembly 2042; primary circuit 300; input isolating switch 301; first bus row 302; second bus row 303; circuit breaker 304; output isolating switch 305; reactive power compensation control switch 306; reactive power compensator 307; switching control switch 3071; three-phase ac contactor 3072; individual event A.C. contactor 3073; three-phase compensation capacitors 3074; single-phase compensation capacitors 3075; phase shortage checkout gear 308; control device 309; current transformer 310; voltage transformer 311; secondary control loop 400; earth leakage protective loop 401; closing circuit 402; trip(ping) circuit 403; short-circuit protector 404; earth leakage protective device 405.
Embodiment
Please be simultaneously referring to Fig. 1 to Fig. 3, low-pressure reactive compensation power distribution cabinet 10 comprises cabinet 200 and the primary circuit 300 and the secondary control loop 400 that are installed in the cabinet 200.
Primary circuit 300 comprises input isolating switch 301, first bus row, 302, second bus row 303, circuit breaker 304, output isolating switch 305, reactive power compensation control switch 306, reactive power compensator 307, phase shortage checkout gear 308 and control device 309; The low pressure inlet wire of power supply is connected to the fixed contact suitable for reading of input isolating switch 301; the end opening moving contact of input isolating switch 301 is connected with the fixed contact suitable for reading of circuit breaker 304 by first bus row 302; the end opening moving contact of circuit breaker 304 is connected with the fixed contact suitable for reading of output isolating switch 305 and the fixed contact suitable for reading of reactive power compensation control switch 306 respectively by second bus row 303; the end opening moving contact of output isolating switch 305 is used for being connected with load; reactive power compensator 307 is connected with the end opening moving contact of reactive power compensation control switch 306; the input of phase shortage checkout gear 308 is connected with the low pressure inlet wire of power supply; the output of control device 309 and phase shortage checkout gear 308; reactive power compensation control switch 306 and reactive power compensator 307 connect; control device 309 is used for the switching work of control reactive power compensator 307; the testing result control reactive power compensation control switch 306 that also is used for providing according to phase shortage checkout gear 308 is in closure; disconnect the switching of two kinds of operating states, to realize reactive power compensator 307 protections.
Further, primary circuit 300 also comprises current transformer 310, voltage transformer 311, current transformer 310 is arranged between circuit breaker 34 and second bus row 33 in the circuit, voltage transformer 311 is connected with the low pressure inlet wire of power supply, reactive power compensator 307 comprises switching control switch 3071, three-phase ac contactor 3072, individual event A.C. contactor 3073, three-phase compensation capacitors 3074 and single-phase compensation capacitors 3075, switching control switch 3,071 one ends are connected with reactive power compensation control switch 306, the other end is connected with an end of three-phase ac contactor 3072 or single phase alternating current (A.C.) contactor 3073, and the other end of described three-phase ac contactor 3072 and single phase alternating current (A.C.) contactor 3073 is connected with single-phase compensation capacitors 3075 with three-phase compensation capacitors 3074 respectively; Control device 309 also is connected with current transformer 310, voltage transformer 311, output isolating switch 305 and switching control switch 3071, and the current value that control device 309 produces according to current transformer 310, voltage transformer 311, magnitude of voltage and default reference current value, reference voltage value are controlled switching control switch 3071 in switching closed, that disconnect two kinds of operating states.
Secondary control loop 400 comprises earth leakage protective loop 401, closing circuit 402, trip(ping) circuit 403, short-circuit protector 404 and earth leakage protective device 405; the input of earth leakage protective loop 401, closing circuit 402, trip(ping) circuit 403 and earth leakage protective device 405 is connected with the low pressure inlet wire of power supply by short-circuit protector 404 respectively, and the output of earth leakage protective loop 401, closing circuit 402, trip(ping) circuit 403 and earth leakage protective device 405 is connected with the end opening moving contact of circuit breaker 304 respectively.Wherein, short-circuit protector 404 is fuse.
Be provided with two horizontal dividing plates 201 in the cabinet 200, horizontal dividing plate 201 is divided into three chambers in upper, middle and lower with cabinet 200, upper chamber is for reserving chamber, middle chamber is in order to install input isolating switch 301 and circuit breaker 304, and lower chambers is used for installing output isolating switch 305, reactive power compensator 307 and earth leakage protective device 405; Each chamber of cabinet 200 is respectively arranged with corresponding cabinet door, what the middle chamber front cabinet door was provided with circuit breaker 304 closes the branch rim brake, and the lower chambers front cabinet door is provided with control switch button and the indicator light of ammeter, voltmeter, control device 309 and secondary control loop 400.
Further, the sidewall 202 of cabinet 200 is provided with heat dissipation wind channel 203, heat dissipation wind channel 203 can form in the following manner: please be simultaneously referring to Fig. 4, sidewall 202 at cabinet 200 is installed cold plate 204, space between the sidewall 202 of cold plate 204 and cabinet 200 forms heat dissipation wind channel 203, wherein cold plate 204 comprises loading plate 2041 and is installed in thermoelectric semiconductor cooling assembly 2042 on the loading plate 2041, and the element of the chill surface of cold plate 204 in the low-pressure reactive compensation power distribution cabinet 10, low-pressure reactive compensation power distribution cabinet 10 also comprises temperature-detecting device 312, temperature-detecting device 312 is for detection of the temperature in the cabinet 200, and the corresponding temperature value of generation; Control device 309 also with temperature-detecting device 312 and thermoelectric semiconductor cooling assembly 2042, the temperature value that control device 309 provides according to temperature-detecting device 312 and 2042 work of the reference temperature value that prestores control thermoelectric semiconductor cooling assembly.
In the above-mentioned low-pressure reactive compensation power distribution cabinet 10; the end opening moving contact of circuit breaker 304 is connected with the fixed contact suitable for reading of output isolating switch 305 and the fixed contact suitable for reading of reactive power compensation control switch 306 respectively by second bus row 303; reactive power compensator 307 is connected with the end opening moving contact of reactive power compensation control switch 306; the input of phase shortage checkout gear 308 is connected with the low pressure inlet wire of power supply; the output of control device 309 and phase shortage checkout gear 308; reactive power compensation control switch 306 and reactive power compensator 307 connect; control device 309 is the switching work of control reactive power compensator 307 automatically; so when the component variation of the variation of electric network source and low-voltage distribution cabinet self, dynamically adjust reactive power compensation; the testing result that control device 309 also provides according to phase shortage checkout gear 308 is controlled reactive power compensation control switch 306 in closure; disconnect the switching of two kinds of operating states to guarantee that reactive power compensator 307 can excise timely when the phase shortage situation takes place, to reach the purpose of protection reactive power compensator 307.

Claims (6)

1. low-pressure reactive compensation power distribution cabinet, comprise cabinet and be installed in cabinet interior primary circuit and secondary control loop, it is characterized in that: the primary circuit comprises the input isolating switch, first bus row, second bus row, circuit breaker, the output isolating switch, the reactive power compensation control switch, reactive power compensator, phase shortage checkout gear and control device, the low pressure inlet wire of power supply is connected to the fixed contact suitable for reading of input isolating switch, the end opening moving contact of input isolating switch is connected with the fixed contact suitable for reading of circuit breaker by first bus row, the end opening moving contact of circuit breaker is connected with the fixed contact suitable for reading of output isolating switch and the fixed contact suitable for reading of reactive power compensation control switch respectively by second bus row, the end opening moving contact of described output isolating switch is used for being connected with load, described reactive power compensator is connected with the end opening moving contact of reactive power compensation control switch, the input of phase shortage checkout gear is connected with the low pressure inlet wire of power supply, the output of control device and phase shortage checkout gear, reactive power compensation control switch and reactive power compensator connect, control device is used for the switching work of control reactive power compensator, and the testing result control reactive power compensation control switch that also is used for providing according to the phase shortage checkout gear is in closure, disconnect the switching of two kinds of operating states; Described secondary control loop comprises earth leakage protective loop, closing circuit, trip(ping) circuit, short-circuit protector and earth leakage protective device; the input of earth leakage protective loop, closing circuit, trip(ping) circuit and earth leakage protective device is connected with the low pressure inlet wire of power supply by short-circuit protector respectively, and the output of earth leakage protective loop, closing circuit, trip(ping) circuit and earth leakage protective device is connected with the end opening moving contact of circuit breaker respectively.
2. low-pressure reactive compensation power distribution cabinet as claimed in claim 1, it is characterized in that: short-circuit protector is fuse.
3. low-pressure reactive compensation power distribution cabinet as claimed in claim 1, it is characterized in that: the primary circuit also comprises current transformer, voltage transformer, current transformer is arranged between circuit breaker and second bus row in the circuit, and voltage transformer is connected with the low pressure inlet wire of power supply; Reactive power compensator comprises switching control switch, three-phase ac contactor, individual event A.C. contactor, three-phase compensation capacitors and single-phase compensation capacitors, switching control switch one end is connected with the reactive power compensation control switch, the other end is connected with an end of three-phase ac contactor or single phase alternating current (A.C.) contactor, and the other end of described three-phase ac contactor and single phase alternating current (A.C.) contactor is connected with single-phase compensation capacitors with the three-phase compensation capacitors respectively; Control device also is connected with current transformer, voltage transformer and switching control switch, and the current value that control device produces according to current transformer, voltage transformer, magnitude of voltage and default reference current value, reference voltage value are controlled the switching control switch in switching closed, that disconnect two kinds of operating states.
4. low-pressure reactive compensation power distribution cabinet as claimed in claim 1, it is characterized in that: the sidewall of cabinet is provided with heat dissipation wind channel.
5. low-pressure reactive compensation power distribution cabinet as claimed in claim 4, it is characterized in that: the low-pressure reactive compensation power distribution cabinet also comprises temperature-detecting device, temperature-detecting device is for detection of the temperature in the cabinet, and produces corresponding temperature value; Heat dissipation wind channel can form in the following manner, sidewall at cabinet is installed cold plate, space between the sidewall of installation cold plate and cabinet forms heat dissipation wind channel, wherein cold plate comprises loading plate and is installed in thermoelectric semiconductor cooling assembly on the loading plate, and the element of the chill surface of cold plate in the low-pressure reactive compensation power distribution cabinet, control device also with temperature-detecting device and thermoelectric semiconductor cooling assembly, the temperature value that control device provides according to temperature-detecting device and the work of the reference temperature value that prestores control thermoelectric semiconductor cooling assembly.
6. as claim 4 or 5 described low-pressure reactive compensation power distribution cabinets, it is characterized in that: be provided with horizontal dividing plate in the cabinet, described horizontal dividing plate is divided into three chambers in upper, middle and lower with cabinet, upper chamber is for reserving chamber, middle chamber is in order to install input isolating switch and circuit breaker, and lower chambers is used for installing output isolating switch, reactive power compensator and earth leakage protective device; Each chamber of cabinet is respectively arranged with corresponding cabinet door, and what the middle chamber front cabinet door was provided with circuit breaker closes the branch rim brake, and the lower chambers front cabinet door is provided with control switch button and the indicator light of ammeter, voltmeter, control device and secondary control loop.
CN2013101905020A 2013-05-22 2013-05-22 Low-voltage reactive power compensation power distribution cabinet Pending CN103248061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013101905020A CN103248061A (en) 2013-05-22 2013-05-22 Low-voltage reactive power compensation power distribution cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013101905020A CN103248061A (en) 2013-05-22 2013-05-22 Low-voltage reactive power compensation power distribution cabinet

Publications (1)

Publication Number Publication Date
CN103248061A true CN103248061A (en) 2013-08-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013101905020A Pending CN103248061A (en) 2013-05-22 2013-05-22 Low-voltage reactive power compensation power distribution cabinet

Country Status (1)

Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201270385Y (en) * 2008-09-22 2009-07-08 福建森达电气有限公司 Intelligent synthetic electric distribution box
CN201466502U (en) * 2009-06-29 2010-05-12 河南省电力公司开封供电公司 Power distribution cabinet capable of automatically reducing temperature
CN102664354A (en) * 2012-05-14 2012-09-12 章丘市供电公司 Multifunctional low voltage distribution cabinet
CN202737350U (en) * 2012-08-16 2013-02-13 银川市立恒电气设备有限公司 Digital monitoring intelligentized power distribution cabinet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201270385Y (en) * 2008-09-22 2009-07-08 福建森达电气有限公司 Intelligent synthetic electric distribution box
CN201466502U (en) * 2009-06-29 2010-05-12 河南省电力公司开封供电公司 Power distribution cabinet capable of automatically reducing temperature
CN102664354A (en) * 2012-05-14 2012-09-12 章丘市供电公司 Multifunctional low voltage distribution cabinet
CN202737350U (en) * 2012-08-16 2013-02-13 银川市立恒电气设备有限公司 Digital monitoring intelligentized power distribution cabinet

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Application publication date: 20130814

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