CN203502499U - Device for online monitoring running states of transformer substation grounding grid - Google Patents
Device for online monitoring running states of transformer substation grounding grid Download PDFInfo
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- CN203502499U CN203502499U CN201320599109.2U CN201320599109U CN203502499U CN 203502499 U CN203502499 U CN 203502499U CN 201320599109 U CN201320599109 U CN 201320599109U CN 203502499 U CN203502499 U CN 203502499U
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- 238000012544 monitoring process Methods 0.000 title abstract description 8
- 230000005611 electricity Effects 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims description 27
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- 230000001939 inductive effect Effects 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000011156 evaluation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
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- 238000007796 conventional method Methods 0.000 description 1
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Abstract
The utility model discloses a device for online monitoring running states of a transformer substation grounding grid. The device comprises a CPU, a power supply module, an oscillator and a power amplifier; an output terminal of the power amplifier is connected with an electricity taking device, the electricity taking device is connected to a grounding down lead, the electricity taking device is connected with the CPU through an A/D (Analog/Digital) converter; a measuring coil is connected between the electricity taking device and the A/D converter; and an output terminal of the CPU is connected with a remote substation server through a communication module. Conducting resistor in a circuit of the grounding down lead can be detected through the measuring coil and the electricity taking device, a measuring result can be transmitted to the remote substation server through the communication module, and safety evaluation of the states of a grounding grid can be obtained. According to the device disclosed by the utility model, online remote monitoring can be carried out on the states of the transformer substation grounding grid through the remote substation server; direct guidance can be provided for the running maintenance of the transformer substation grounding grid according to a monitoring evaluation result; and the device has no negative effects on an original device of an electric power system.
Description
Technical field
The utility model relates to a kind of power monitoring equipment, relates in particular to a kind of grounding net of transformer substation operation conditions on-Line Monitor Device.
Background technology
Understand the variation of substation grounding resistance, best means are periodic measurement stake resistances, stake resistance about transformer station's lightning protection, at < < power equipment preventive trial rules > > DL/T 596-2005, stipulate as being generally greater than 10 ohm, have that a plurality of earthing poles are connected in parallel only to get 10 ohm of total stake resistances be inadequate, so stipulate that again each earthing pole must be below 50 ohm at the stake resistance of the occasion of individualism, the stake resistance of wishing in a word lightning protection can be as far as possible low, reduce thunder-strike current and flow into the electric discharge that causes secondary.
Reducing substation grounding resistance is the major measure that improves lightning protection level.In actual motion, due to burn into manual breakage, the reason such as lack of standardization of constructing, cause substation grounding downlead bad connection, cause that stake resistance sharply rises, thereby lightning protection level is reduced, therefore need not timing down conductor is detected, so that maintenance and repair in time.
Inspection judgement to down conductor fault in order to grasp the variation of grounding resistance, also needs measurement of Grounding Resistance in substation operation process.At present, the way of domestic common employing is that grounded screen is carried out to regular measurement, understand the situation of change of stake resistance in the regular period, according to measurement situation, take measures again, although said method is simple, but exist to measure inaccurate, the problem such as error is large, and up to the present also still do not occur special substation grounding net state monitor to the facility with state estimation.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of grounding net of transformer substation operation conditions on-Line Monitor Device, this device can make operational management personnel just can understand exactly the ground connection situation of transformer station in control center, thereby can formulate in time, targetedly the grounding maintenance scheme of problem shaft tower, improve the safety operation level of electric system.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of grounding net of transformer substation operation conditions on-Line Monitor Device, comprise central processing unit, the input end of described central processing unit is connected with power module, the output terminal of described central processing unit is in series with oscillator and power amplifier, the output terminal of described power amplifier is connected with electricity getting device, and described electricity getting device is connected on down conductor, and described electricity getting device connects described central processing unit by A/D converter; Between described electricity getting device and described A/D converter, be connected with for measuring the measuring coil of described down conductor electric current; The output terminal of described central processing unit is connected with remote branch station server by communication module.
As preferred technical scheme, described electricity getting device comprises the iron core being connected with described down conductor, and described iron core periphery is set with inductive coil, and described inductive coil connects described A/D converter.
As preferred technical scheme, described communication module comprises the RS-485 communication interface being connected on described central processing unit, and described RS-485 communication interface connects described remote branch station server by optical fiber.
As the improvement to technique scheme, described central processing unit is set to ARM11 processor, and described communication module is arranged on described ARM11 processor.
Owing to having adopted technique scheme, a kind of grounding net of transformer substation operation conditions on-Line Monitor Device, comprise central processing unit, the input end of described central processing unit is connected with power module, the output terminal of described central processing unit is in series with oscillator and power amplifier, the output terminal of described power amplifier is connected with electricity getting device, and described electricity getting device is connected on down conductor, and described electricity getting device connects described central processing unit by A/D converter; Between described electricity getting device and described A/D converter, be connected with for measuring the measuring coil of described down conductor electric current; The output terminal of described central processing unit is connected with remote branch station server by communication module; The beneficial effects of the utility model are: by measuring coil and electricity getting device, coordinate the use of A/D converter and central processing unit, the loop conducting resistance of down conductor is detected, and transfer to remote branch station server by communication module, by remote branch station server, use conventional Calculation Method, and comprehensively analyze in conjunction with historical data, draw the safety assessment to grounded screen state, thus the safe operation of Real-Time Monitoring grounded screen.The utility model can carry out online remote monitoring to the grounded screen situation of transformer station by remote branch station server; According to the grounded screen operation maintenance of monitoring and evaluation result Neng Wei transformer station, provide direct guidance; This device can not produce any negative effect to the original device of electric system.
Accompanying drawing explanation
The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 is the structured flowchart of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, further set forth the utility model.In the following detailed description, only by the mode of explanation, some one exemplary embodiment of the present utility model has been described.Undoubtedly, those of ordinary skill in the art can recognize, in the situation that not departing from spirit and scope of the present utility model, can to described embodiment, revise by various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than for limiting the protection domain of claim.
As shown in Figure 1, a kind of grounding net of transformer substation operation conditions on-Line Monitor Device, comprise central processing unit, the input end of described central processing unit is connected with power module, the output terminal of described central processing unit is in series with oscillator and power amplifier, the output terminal of described power amplifier is connected with electricity getting device, and described electricity getting device is connected on down conductor, and described electricity getting device connects described central processing unit by A/D converter; Between described electricity getting device and described A/D converter, be connected with for measuring the measuring coil of described down conductor electric current; The output terminal of described central processing unit is connected with remote branch station server by communication module.
Described electricity getting device comprises the iron core being connected with described down conductor, and described iron core periphery is set with inductive coil, and described inductive coil connects described A/D converter.Described communication module comprises the RS-485 communication interface being connected on described central processing unit, and described RS-485 communication interface connects described remote branch station server by optical fiber.Described central processing unit is set to ARM11 processor, and described communication module is arranged on described ARM11 processor, and described A/D converter is arranged in described ARM11 processor, ARM is the abbreviation of English " Advanced RISC Machines ", Chinese translation is " advanced reduced instruction set computer device ", RISC in English " Advanced RISC Machines " is again the abbreviation of English " Reduced Instruction Set Computer ", and Chinese translation is " Reduced Instruction Set Computer ".
In this embodiment, the power module that power module can adopt Beijing emerging Bo Sida company to produce; ARM11 processor can adopt and fly to insult the OK210 development board that embedded company produces, sort processor development board carries A/D converter, the A/D converter being carried by this processor development board, as the A/D converter being connected with inductive coil, contributes to simplify this device; Oscillator adopts the U.S. product SiT1602 of SiTime company oscillator; Power amplifier employing U.S. WE(west electricity) three grades of electron tube FU-805 of high-power directly-heated type that company produces; The HKCT035 coil that inductive coil and measuring coil all adopt Shandong Province of China Zibo China Tech company to produce; The communication module conduct that the communication module of this embodiment carries for this ARM11 processor development board; 9 System X3500M3I08 servers that adopt IBM Corporation to produce of remote branch station server, cost is low, safe and reliable to operation.
The course of work of the present embodiment is as follows:
During use, this device is arranged on to the down conductor place of shaft tower in transformer station, transformer or terminal box.This device adopts oscillator to produce alien frequencies sine wave signal, so-called alien frequencies sine wave signal is non-power frequency sine wave signal, after carrying out power amplification by power amplifier, injection comprises iron core, by inductive coil, utilizes electromagnetic induction principle generation current in down conductor loop; By a measuring coil, measure the electric current flowing through on down conductor again, in conjunction with the pumping signal in inductive coil, calculate down conductor loop conducting resistance; By communication module, measurement result is sent to remote branch station server, the instruments such as computing machine that pass through this remote branch station server or be connected with this remote branch station server again, use conventional method comprehensively to analyze in conjunction with historical data, draw the safety assessment of down conductor, thus the operation of implement directions shaft tower, transformer, the work of terminal box grounding maintenance.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a grounding net of transformer substation operation conditions on-Line Monitor Device, it is characterized in that: comprise central processing unit, the input end of described central processing unit is connected with power module, the output terminal of described central processing unit is in series with oscillator and power amplifier, the output terminal of described power amplifier is connected with electricity getting device, and described electricity getting device is connected on down conductor, described electricity getting device connects described central processing unit by A/D converter; Between described electricity getting device and described A/D converter, be connected with for measuring the measuring coil of described down conductor electric current; The output terminal of described central processing unit is connected with remote branch station server by communication module.
2. a kind of grounding net of transformer substation operation conditions on-Line Monitor Device as claimed in claim 1, it is characterized in that: described electricity getting device comprises the iron core being connected with described down conductor, described iron core periphery is set with inductive coil, and described inductive coil connects described A/D converter.
3. a kind of grounding net of transformer substation operation conditions on-Line Monitor Device as claimed in claim 1, it is characterized in that: described communication module comprises the RS-485 communication interface being connected on described central processing unit, described RS-485 communication interface connects described remote branch station server by optical fiber.
4. a kind of grounding net of transformer substation operation conditions on-Line Monitor Device as described in claim 1,2 or 3, it is characterized in that: described central processing unit is set to ARM11 processor, and described communication module is arranged on described ARM11 processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599109.2U CN203502499U (en) | 2013-09-25 | 2013-09-25 | Device for online monitoring running states of transformer substation grounding grid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320599109.2U CN203502499U (en) | 2013-09-25 | 2013-09-25 | Device for online monitoring running states of transformer substation grounding grid |
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| CN203502499U true CN203502499U (en) | 2014-03-26 |
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| CN201320599109.2U Expired - Fee Related CN203502499U (en) | 2013-09-25 | 2013-09-25 | Device for online monitoring running states of transformer substation grounding grid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499747A (en) * | 2013-09-25 | 2014-01-08 | 国家电网公司 | Device for online monitoring running state of transformer substation grounding grid |
| CN104569693A (en) * | 2015-01-28 | 2015-04-29 | 贵州电网公司输电运行检修分公司 | Testing system for transmission tower leakage current and earth screen flow leakage channel |
| CN105182168A (en) * | 2015-10-10 | 2015-12-23 | 国网山西省电力公司临汾供电公司 | Defect screening detection apparatus of grounding network upper guide body wire |
| CN113687146A (en) * | 2021-08-13 | 2021-11-23 | 国网河北省电力有限公司检修分公司 | Grounding grid downlead testing arrangement based on wireless transmission |
-
2013
- 2013-09-25 CN CN201320599109.2U patent/CN203502499U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499747A (en) * | 2013-09-25 | 2014-01-08 | 国家电网公司 | Device for online monitoring running state of transformer substation grounding grid |
| CN104569693A (en) * | 2015-01-28 | 2015-04-29 | 贵州电网公司输电运行检修分公司 | Testing system for transmission tower leakage current and earth screen flow leakage channel |
| CN104569693B (en) * | 2015-01-28 | 2015-11-18 | 贵州电网公司输电运行检修分公司 | The test macro of a kind of transmission tower leakage current and earth mat current by pass |
| CN105182168A (en) * | 2015-10-10 | 2015-12-23 | 国网山西省电力公司临汾供电公司 | Defect screening detection apparatus of grounding network upper guide body wire |
| CN113687146A (en) * | 2021-08-13 | 2021-11-23 | 国网河北省电力有限公司检修分公司 | Grounding grid downlead testing arrangement based on wireless transmission |
| CN113687146B (en) * | 2021-08-13 | 2023-11-24 | 国网河北省电力有限公司检修分公司 | Grounding grid down lead testing device based on wireless transmission |
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