CN2849736Y - System for detecting large grounding network of power plant and transformer substation - Google Patents

System for detecting large grounding network of power plant and transformer substation Download PDF

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Publication number
CN2849736Y
CN2849736Y CN 200520103168 CN200520103168U CN2849736Y CN 2849736 Y CN2849736 Y CN 2849736Y CN 200520103168 CN200520103168 CN 200520103168 CN 200520103168 U CN200520103168 U CN 200520103168U CN 2849736 Y CN2849736 Y CN 2849736Y
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CN
China
Prior art keywords
module
detection signal
processing unit
central processing
signal acquisition
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Application number
CN 200520103168
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Chinese (zh)
Inventor
高政
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高政
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Priority to CN 200520103168 priority Critical patent/CN2849736Y/en
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Publication of CN2849736Y publication Critical patent/CN2849736Y/en

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Abstract

The utility model relates to a device system for detecting problems existing in large ground networks of power generating plants and transformer stations. The utility model has the technical scheme that the utility model comprises a ground testing source device and a detection signal collecting processing control device which are mutually connected, wherein the ground testing source device is composed of a power supply automatic control device and an isolating transformer which are assembled together; the detection signal collecting processing control device comprises a detection signal collecting processing device and a computer which are mutually connected, wherein the detection signal collecting processing device comprises a host machine module, an outlet module, a sampling module, a communication module and a power module. The utility model has the advantages of fast detecting speed, and accurate and complete data, and can immediately obtain quality information and drawing and detail important data analysis reports of the ground network.

Description

Generating plant, transformer station's large-scale grounding network detection system

Technical field

The utility model relates to a kind of apparatus system that the problem that generating plant, transformer station large-scale grounding network exists is detected of being used for.

Background technology

The grounded screen of generating plant, transformer station is working earthing, protective ground, lightning protected ground connection, the antistatic protection ground connection of current collection power system's high-low-voltage electrical equipment and relay protection aut.eq., and four big functions are in the grid of one.It is one of important electrical equipment that guarantees safe operation of power system.Grounded screen plays crucial effects for the safe operation of electric system.At present; because the ground connection of the grounded screen of domestic generating plant, transformer station, ground lead, electrical equipment existing problems itself; and the initiation high voltage; big electric current is scurried into low-pressure system, burns house-service equipment, the breakdown protection secondary cable; burn the relay protection components and parts; cause the protective relaying device malfunction, electrical equipment is burnt in tripping.Cause system sectionalizing, large area blackout for this reason.For national economy brings about great losses, even cause social influence.Because grounded screen and earthing device belong to concealed work.Also there is not at present advanced checkout equipment.Stipulate in national for this reason up-to-date " pilot project of earthing device, cycle and requirement " standard, for move more than 10 years (comprise rerun after transforming reach this time limit) send out factory, inspection all will be excavated by transformer station.Along with power system development, the single-line to ground fault electric current sharply rises, and the situation of single-line to ground fault electric current greater than the three-phase shortcircuit electric current occurred.Blowing earthing device repeatedly to occur, all caused great equipment burnout accident in the system owing to short trouble for this reason.The North China Power Group just requires to dock earth mat and excavates inspection to change 5 years into 10 years.In recent years because accidents caused the increasing of grounded screen, generating plant in all parts of the country, transformer station all begin to excavate inspection, but the high-low pressure equipment and the framework thereof that because the geographic position that the design drawing of grounded screen and practice of construction are installed differs greatly, factory are arranged again, stand more than the interior ground stand in great numbers.Various passages in factory, the station equipment district, factory building, the switch gear room, building such as pulpit is numerous.The various pipeline grooves of below ground, the high-low pressure cable laying is intricate.Grounded screen and ground lead are countless at the vulnerable area of underground pad.This all gives and excavates the defective of checking grounded screen, brings very big difficulty.Excavation inspection will be expended a large amount of artificial and material resources simultaneously, also can be described as and has no way of searching at all.Grounded screen is through underground corrosion for many years, and generating plant, transformer station are through too much enlarging, increase-volume, the transformation of phase.Make the grounded screen of each phase engineering, the situation that is welded to connect all be difficult to find.If grounded screen is all excavated inspection, will make factory, all high-low pressure equipment of standing lose ground protection, influence normal working earthing.This can be to the normal operation of electric system, and the electrical equipment and the personal safety of generating plant, transformer station caused bigger danger.

The utility model content

It is a kind of scientific and reasonable for structure, simple to operate that the purpose of this utility model just is to provide, and operational analysis is generating plant, transformer station's large-scale grounding network detection system intuitively.

The technical solution of the utility model is: the utility model comprises interconnective earthing test source apparatus, detection signal acquisition process and control device; The earthing test source apparatus is made of the power supply automaton and the isolating transformer that are assembled together; Detection signal acquisition process and control device comprise interconnective detection signal acquisition processing device and computing machine; The detection signal acquisition processing device comprises host module, outlet module, sampling module, communication module and power module, and host module comprises: central processing unit, real-time clock, power down keep data-carrier store, data communication module; Sampling module is the A/D digital to analog converter; Outlet module comprises controlling output circuit and remote signalling sample circuit, and communication module comprises two kinds of interfaces of RS232, RS485 and interface treatment circuit; The input end of A/D digital to analog converter in two output terminals difference joint detection signal acquisition and processing apparatus of earthing test source apparatus device, the output of A/D digital to analog converter insert central processing unit with input end, central processing unit is connected with computing machine by interface in the communication module, another output terminal of earthing test source apparatus connects with detection signal acquisition processing device central processing unit by the remote signalling sample circuit, the logical connection with controlling output circuit of central processing unit outputs a control signal to the earthing test source apparatus, two output terminals in addition of earthing test source apparatus are connected on respectively on the grounded screen, and the A/D digital to analog converter is connected with grounded screen to be measured by voltage transmitter.

It is core devices that central processing unit described in the utility model adopts advanced 80C196KC chip; Adopt 12887 to be clock chip, non-volatile random data storer adopts model HK1235, and programmable logic chip GAL16V8 is a controlling output circuit, and data communication module adopts MAX202, MAX1480 chip to finish interface communication.The frame mode of each module for pegging graft in the signal pickup assembly in the native system.Software adopts modular design on this detection system computing machine, and algorithm adopts the fast Flourier compute mode.

Its beneficial effect was after the utility model adopted said structure: measuring speed is fast, and data are accurately comprehensive, just can obtain the drawing data and the detailed important data analysis report of grounded screen quality at once.

Description of drawings

Fig. 1 is the utility model example structure synoptic diagram

Embodiment

The utility model comprises interconnective earthing test source apparatus, detection signal acquisition process and control device as shown in drawings; The earthing test source apparatus is made of the power supply automaton and the isolating transformer that are assembled together; Detection signal acquisition process and control device comprise interconnective detection signal acquisition processing device and computing machine; The detection signal acquisition processing device comprises host module, outlet module, sampling module, communication module and power module, and host module comprises: central processing unit, real-time clock, power down keep data-carrier store, data communication module; Sampling module is the A/D digital to analog converter; Outlet module comprises controlling output circuit and remote signalling sample circuit, and communication module comprises two kinds of interfaces of RS232, RS485 and interface treatment circuit; The input end of A/D digital to analog converter in two output terminals difference joint detection signal acquisition and processing apparatus of earthing test source apparatus device, the output of A/D digital to analog converter insert central processing unit with input end, central processing unit is connected with computing machine by interface in the communication module, another output terminal of earthing test source apparatus connects with detection signal acquisition processing device central processing unit by the remote signalling sample circuit, the logical connection with controlling output circuit of central processing unit outputs a control signal to the earthing test source apparatus, two output terminals in addition of earthing test source apparatus are connected on respectively on the grounded screen, and the A/D digital to analog converter is connected with grounded screen to be measured by voltage transmitter.It is core devices that central processing unit described in the utility model adopts advanced 80C196KC chip; Adopt 12887 to be clock chip, non-volatile random data storer adopts model HK1235, and programmable logic chip GAL16V8 is a controlling output circuit, and data communication module adopts MAX202, MAX1480 chip to finish interface communication.The frame mode of each module for pegging graft in the signal pickup assembly in the native system.Software adopts modular design on this detection system computing machine, and algorithm adopts the fast Flourier compute mode.

Claims (3)

1, generating plant, transformer station's large-scale grounding network detection system is characterized in that this system comprises interconnective earthing test source apparatus, detection signal acquisition process and control device; The earthing test source apparatus is made of the power supply automaton and the isolating transformer that are assembled together; Detection signal acquisition process and control device comprise interconnective detection signal acquisition processing device and computing machine; The detection signal acquisition processing device comprises host module, outlet module, sampling module, communication module and power module, and host module comprises: central processing unit, real-time clock, power down keep data-carrier store, data communication module; Sampling module is the A/D digital to analog converter; Outlet module comprises controlling output circuit and remote signalling sample circuit, and communication module comprises two kinds of interfaces of RS232, RS485 and interface treatment circuit; The input end of A/D digital to analog converter in two output terminals difference joint detection signal acquisition and processing apparatus of earthing test source apparatus device, the output of A/D digital to analog converter insert central processing unit with input end, central processing unit is connected with computing machine by interface in the communication module, another output terminal of earthing test source apparatus connects with detection signal acquisition processing device central processing unit by the remote signalling sample circuit, the logical connection with controlling output circuit of central processing unit outputs a control signal to the earthing test source apparatus, two output terminals in addition of earthing test source apparatus are connected on respectively on the grounded screen, and the A/D digital to analog converter is connected with grounded screen to be measured by voltage transmitter.
2, generating plant according to claim 1, transformer station's large-scale grounding network detection system, it is characterized in that it is core devices that described central processing unit adopts advanced 80C196KC chip: adopt 12887 to be clock chip, non-volatile random data storer adopts model HK1235, programmable logic chip GAL16V8 is a controlling output circuit, and data communication module adopts MAX202, MAX1480 chip to finish interface communication.
3, generating plant according to claim 1, transformer station's large-scale grounding network detection system is characterized in that the frame mode of each module for pegging graft in the native system signal pickup assembly.
CN 200520103168 2005-08-02 2005-08-02 System for detecting large grounding network of power plant and transformer substation CN2849736Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520103168 CN2849736Y (en) 2005-08-02 2005-08-02 System for detecting large grounding network of power plant and transformer substation

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Application Number Priority Date Filing Date Title
CN 200520103168 CN2849736Y (en) 2005-08-02 2005-08-02 System for detecting large grounding network of power plant and transformer substation

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CN2849736Y true CN2849736Y (en) 2006-12-20

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CN 200520103168 CN2849736Y (en) 2005-08-02 2005-08-02 System for detecting large grounding network of power plant and transformer substation

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101216523B (en) * 2007-12-28 2010-06-16 华北电力大学 Substation grounding net defect diagnostic method and apparatus
CN101315403B (en) * 2007-05-29 2010-12-01 华北电力科学研究院有限责任公司 Ground net corrosion detection method and system
CN102332707A (en) * 2011-06-08 2012-01-25 高政 Earth fault signal measuring method and protective device for ungrounded system
CN102707167A (en) * 2012-05-18 2012-10-03 华中科技大学 State monitoring system for grounding grid based on industrial personal computer
CN103235168A (en) * 2013-03-26 2013-08-07 上海大帆电气设备有限公司 Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101315403B (en) * 2007-05-29 2010-12-01 华北电力科学研究院有限责任公司 Ground net corrosion detection method and system
CN101216523B (en) * 2007-12-28 2010-06-16 华北电力大学 Substation grounding net defect diagnostic method and apparatus
CN102332707A (en) * 2011-06-08 2012-01-25 高政 Earth fault signal measuring method and protective device for ungrounded system
CN102332707B (en) * 2011-06-08 2014-04-16 高政 Earth fault signal measuring method and protective device for ungrounded system
CN102707167A (en) * 2012-05-18 2012-10-03 华中科技大学 State monitoring system for grounding grid based on industrial personal computer
CN102707167B (en) * 2012-05-18 2015-04-15 华中科技大学 State monitoring system for grounding grid based on industrial personal computer
CN103235168A (en) * 2013-03-26 2013-08-07 上海大帆电气设备有限公司 Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission
CN103235168B (en) * 2013-03-26 2015-03-25 上海大帆电气设备有限公司 Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20061220

Termination date: 20130802

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