CN102707167A - State monitoring system for grounding grid based on industrial personal computer - Google Patents

State monitoring system for grounding grid based on industrial personal computer Download PDF

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Publication number
CN102707167A
CN102707167A CN2012101548298A CN201210154829A CN102707167A CN 102707167 A CN102707167 A CN 102707167A CN 2012101548298 A CN2012101548298 A CN 2012101548298A CN 201210154829 A CN201210154829 A CN 201210154829A CN 102707167 A CN102707167 A CN 102707167A
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current
voltage
test
center processor
connects
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CN2012101548298A
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CN102707167B (en
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张丹丹
胡滨
陈爱文
贺家慧
吴志威
张蓬鹤
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华中科技大学
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Abstract

The invention discloses a state monitoring system for a grounding grid based on an industrial personal computer. The state monitoring system comprises a ground impedance tester which is used for receiving a test command from a central processor and measuring the power frequency alternating-current parameters of the grounding grid, a direct-current on-resistance tester which is used for receiving a test command from the central processor and measuring the direct-current on-resistance among grounding wires, and the central processor which is used for sending test commands to the ground impedance tester and the direct-current on-resistance tester based on the development of the industrial personal computer, statistically analyzing the measured power frequency alternating-current parameters and the direct-current on-resistance in time and location and evaluating the operating condition of the grounding grid. Based on a grounding grid intelligent measurement system developed by the industrial personal computer, the state monitoring system for the grounding grid based on the industrial personal computer, disclosed by the invention, can test the electrical parameters of the grounding grid in standardization and intellectualization manner, and can collect and analyze the electrical parameters and evaluate the operating condition, so as to effectively reduce errors generated during the measurement and improve the efficiency for the field test.

Description

Receive Ground Mat State Monitoring System based on industrial computer

Technical field

The present invention relates to electric system grounded screen safe operation field, more specifically, relate to Receive Ground Mat State Monitoring System based on industrial computer.

Background technology

Grounded screen is one of important measures that guarantee the power system security reliability service.When overcurrent appearred in electric system, good ground connection can make electric current spill into fast in the earth, guaranteed power equipment and staff's safety.But it is underground that grounded screen is embedded in for a long time, receives the influence of earth current, and the soil electrochemistry corrosion be prone to take place, and breaks down or rupture, and influences its diffusing stream ability, the harm power system security.Therefore, the running status of monitoring grounding net is most important.

Disclose a kind of grounded screen wireless detection device among the China utility model patent instructions CN201035712, can utilize radio magnetic wave to be grounded the measurement of impedance; Disclose a kind of Resistance of Grounding Grids alien frequencies test macro among the China utility model patent instructions CN201229381, realized the facilitation operation of test through single-chip microcomputer and touch-screen.

The above-mentioned method and apparatus that is directed against the grounded screen measurement of electric parameter all needs the manual record test data of tester in measuring process, and finishing analysis, and workload is huge, is difficult to guarantee the validity and the standardization of test data; And because different testers writes down the custom difference, the detecting information record possibly not cause error is appearred in test result analysis entirely, reduces the reliability of test.

Summary of the invention

The object of the present invention is to provide a kind of Receive Ground Mat State Monitoring System, the measurement of the earth mat electric parameter that can full automaticly achieve a butt joint, and state analysis and assessment based on industrial computer.

Receive Ground Mat State Monitoring System based on industrial computer comprises:

The earth loop impedance test appearance is connected with center processor, is used for the test command of receiving center processor, measures the voltage and current signal of sign grounded screen industrial frequency AC parameter and it is fed back to center processor;

Direct current continuity test appearance is connected with center processor, is used for the test command of receiving center processor, measures the voltage and current signal of the direct current conducting resistance between the sign down conductor and it is fed back to center processor;

Center processor; Develop based on industrial computer; Be used for sending test command, receive the voltage and current signal of earth loop impedance test appearance and direct current continuity test appearance feedback, according to voltage and current calculated signals industrial frequency AC parameter and direct current conducting resistance to earth loop impedance test appearance and direct current continuity test appearance; And industrial frequency AC parameter and direct current conducting resistance carried out time and geographic statistical study, and the running status of grounded screen is carried out comprehensive assessment.

Further, said center processor comprises that information acquisition and administration module, data analysis module, state estimation module and information derive module;

Information acquisition and administration module; Be used for the user and set test condition; Send corresponding test command according to test condition to earth loop impedance test appearance and direct current continuity test appearance, receive the electric current and the voltage signal of two testers feedback, calculating each electric parameter according to electric current and voltage signal is industrial frequency AC parameter and direct current conducting resistance; With each electric parameter and corresponding test condition association store, and supply the user to do bookkeeping;

Data analysis module; Be used for the electric parameter of data analysis module stores is carried out time and geographic statistical study, so that the user grasps the geographic distribution statistical information of grounded screen each item electric parameter test point that trend and electric parameter are corresponding over time;

The state estimation module is used for according to the electric parameter of data analysis module storage the grounded screen running status being carried out comprehensive assessment;

Information derives module, be used for imposing a condition according to the user optionally reading electric parameter, data analysis result and state estimation result from information acquisition and administration module, data analysis module and state estimation module, and the generation test report is or/and form.

Further, said earth loop impedance test appearance comprises alien frequencies constant-current supply, current sensor, voltage sensor, electric current amplification and filtering circuit, voltage amplification and filtering circuit, an A/D transducer, DSP, first serial communication interface; Current sensor connects electric current and amplifies and filtering circuit; Voltage sensor connects voltage amplification and filtering circuit; The electric current amplification is connected an A/D transducer with filtering circuit respectively with voltage amplification and filtering circuit; The one A/D transducer connects DSP, and DSP connects center processor through first serial communication interface, and DSP also connects the alien frequencies constant-current supply.

Further, said continuity test circuit comprises dc constant flowing power, current sampling circuit, current amplifier, voltage sampling circuit, voltage amplifier, the 2nd A/D transducer, microprocessor, second serial communication interface; Current sampling circuit connects the 2nd A/D transducer through current amplifier, and voltage sampling circuit connects the 2nd A/D transducer through voltage amplifier, and the 2nd A/D transducer connects microprocessor, and microprocessor connects industrial computer through second serial communication interface.

The present invention compares prior art and has following advantage:

1) can accomplish standardization, the intelligent test of grounded screen electric parameter based on the grounded screen intelligent measuring systems of industrial computer platform development; Automatic store test data, and carry out finishing analysis, test result is shown with patterned form, more visual and clear; Can effectively reduce the mistake in the measuring process, the efficient of raising field experiment.Simultaneously, to the standardization collection and the processing of detecting information, perfect production management has been played positive effect to the management and the monitoring of earth mat.

2) can the current running status of grounded screen be carried out intelligentized objective, comprehensive, scientifical, comprehensive evaluation, and provide comments according to the parameter of measuring gained with actual directive significance.

Description of drawings

Fig. 1 is overall technological scheme figure of the present invention.

Fig. 2 is the circuit block diagram of earth loop impedance test appearance among the present invention.

Fig. 3 is the circuit block diagram of continuity test appearance among the present invention.

Fig. 4 is the synoptic diagram that the embodiment graphical data shows.

Embodiment

Below in conjunction with accompanying drawing the present invention is explained further details:

As shown in Figure 1, comprise center processor, earth loop impedance test appearance and direct current continuity test appearance based on the Receive Ground Mat State Monitoring System of industrial computer.Center processor is developed based on industrial computer; Send test command to earth loop impedance test appearance and direct current continuity test appearance; Earth loop impedance test appearance and direct current continuity test appearance are tested the industrial frequency AC parameter and the direct current conducting resistance between the down conductor of grounded screen respectively and are fed back to center processor, and center processor carries out statistical study to two tester feedback data and assesses the running status of grounded screen.

The earth loop impedance test appearance is grounded the measurement of industrial frequency AC parameters such as impedance, soil resistivity, step voltage, touch voltage, place surface potential distribution.As shown in Figure 2, the earth loop impedance test appearance comprises alien frequencies constant-current supply, current sensor, voltage sensor, electric current amplification and filtering circuit, voltage amplification and filtering circuit, A/D transducer, DSP, serial communication interface.Current sensor connects electric current and amplifies and filtering circuit; Voltage sensor connects voltage amplification and filtering circuit; The electric current amplification respectively is connected A/D transducer with voltage amplification with filtering circuit with filtering circuit; The A/D transducer connects DSP, and DSP connects industrial computer through serial communication interface, and DSP also connects the alien frequencies constant-current supply.DSP exports the measuring current of corresponding size and frequency through the test command of serial communication interface reception industrial computer according to test command control alien frequencies constant-current supply.The alien frequencies constant-current supply is an interchange constant-current supply, and output waveform is sinusoidal wave, and output frequency can be set at 45Hz and 55Hz by dsp chip; Also by dsp chip control, maximum can reach 3A to output current; Output exports external measurement loop through isolating the back to through C1-AC and two terminals of C2-AC, for external loop provides power supply.The alien frequencies constant-current supply adopts ripe SPWM switch power technology, and the output waveform distortion is little to reach, the little lightweight advantage of volume.The current sensor of C1-AC and C2-AC end is that the electric current mutual inductor is gathered external measurement current in loop signal; (centre frequency is 45Hz or 55Hz to remove on-the-spot interference through excess current amplification and filtering circuit; High precision and high stability electronic component have been adopted; So centre frequency has very high precision, have very high Q value simultaneously) and amplify after, get into AD converter (12 modulus conversion chips at a high speed).Use the voltage signal of voltage sensor (can adopt sampling resistor) the collecting test point of P1-AC and P2-AC simultaneously, behind amplification, filtering circuit, get into AD converter.AD converter is given dsp chip with the information feedback of gathering, and sends industrial computer to through the serial ports real-time communication.

Direct current continuity test appearance is used to measure the direct current conducting resistance between the down conductor.As shown in Figure 3, the continuity test circuit comprises dc constant flowing power, current sampling circuit, current amplifier, voltage sampling circuit, voltage amplifier, A/D transducer, microprocessor, serial communication interface.Current sampling circuit connects the A/D transducer through current amplifier, and voltage sampling circuit connects the A/D transducer through voltage amplifier, and the A/D transducer connects microprocessor, and microprocessor connects industrial computer through serial communication interface; Microprocessor also can connect peripheral hardware, for example display screen, keyboard or the like.Microprocessor is exported the measuring current of corresponding size through the test command of serial communication interface reception industrial computer according to test command control dc constant flowing power.Dc constant flowing power provides test required D.C. high-current according to user's request, and maximum can reach 10A.Electric current exports external measurement loop through isolating the back to through C1-DC and two terminals of C2-DC, connects measuring resistance sample rate current signal with P1-DC and two terminals of P2-DC.Electric current that current sensor and voltage sensor are gathered and voltage signal get into A/D converter through behind the corresponding amplifying circuit, get into microprocessor at last.Microprocessor can directly be handled data, also can data be delivered to through the serial ports real-time communication and carry out Unified Treatment in the industrial computer.

Center processor is based on the industrial computer platform development, realizes graphical, the facilitation of information acquisition, and the intellectuality of data management and analysis is for the user offers convenience.Center processor comprises four big functional modules: information acquisition and administration module, data analysis module, state estimation module and information derive module.

Information acquisition and administration module are grounded management, the collection of net relevant information, adopt dialog box and form mode comprehensively to realize, metrical information is come into plain view.Information acquisition and administration module confession user set test condition and comprise measuring current size, test frequency, test point position, test environment information such as (temperature, humidity, weather conditions); Send test command according to test condition to the tester of bottom, test command comprises measuring current size and/or test frequency information.Information acquisition and administration module receive the electric current and the voltage signal of bottom two testers; Calculate various electric parameters according to electric current and voltage signal; With each electric parameter and corresponding test condition association store, and supply the user to do to check, edit, bookkeeping such as ordering.

Data analysis module carries out time, geographic statistics, analysis, drawing to information acquisition and administration module stored parameters are electric; Adopt flat distribution map and curve map to show, be convenient to the user and grasp grounded screen each item electric parameter geographic distribution statistical information of the test point of trend and electric parameter correspondence over time more easily.

The state estimation module is that diffusing stream ability, ducting capacity, structural intergrity and the degree that is corroded etc. of grounded screen are carried out comprehensive assessment according to detecting information to the grounded screen running status, provides valuable comments.Its core is a grounded screen level assessment algorithm.Impedance ground, step voltage, touch voltage, conducting resistance quadrinomial parameter that this algorithm utilizes systematic survey to obtain, theoretical in conjunction with the initial designs information of earth mat according to fuzzy level assessment, the running status of earth mat is carried out the overall evaluation.And,, provide comments with actual directive significance in conjunction with the correlation experience of grounding net of transformer substation site test according to evaluation result.Concrete implementation can be referring to " Zhang Penghe etc. adopt the grounded screen state estimation research of Fuzzy AHP, " electrical measurement and instrument " 2011 the 48th the 12nd phases of volume ".

Information derives module and imposes a condition according to the user; Optionally read electric parameter, data analysis result and state estimation result and generate and export test report, testing journal sheet etc. automatically; Make that the grounded screen detecting information can intelligent, normalized management, enhance productivity.Impose a condition for ease of the user, information derives can prestore in the module test report and report form template confession user selection.

Embodiment:

For taking into account the needs of communication of bottom test circuit and data management analysis, industrial computer is selected the PCM-LX main frame, 3.5 cun embedded main boards, and AMD LX800 processor meets the RoHs standard, supports windows XP/CE/XPe system.Software adopts .NETFramework 4.0 to develop based on Winxp operating system.

When measuring grounded screen alternating-current electric parameter, lead-out terminal C1-AC, C2-AC, P1-AC, the P2-AC of the earth loop impedance test appearance among the present invention is connected on the ground stud, in the software systems on being loaded into industrial computer test condition is set, send test command; System's automatic collecting test data of meeting also write down detecting information.

The method of measurement DC electrical parameter and above-mentioned similar only needs to change the earth loop impedance test appearance into direct current continuity test appearance and gets final product.

After test was accomplished, the software in the industrial computer had collected whole detecting informations.The user can inquire about and edit whole data in data management module; Then as required, select analyses such as specific data set is added up, drawing.Fig. 4 is the graphical synoptic diagram that shows of this instance data.When the grounded screen running status is assessed, only need to select the test duration section, evaluation module meeting automatic screening is also handled the total data in this time period, and the operation assessment algorithm carries out the comprehensive assessment of grounded screen running status, and the output comments.Table 1 is the state estimation result of embodiment.

The state estimation result of table 1 embodiment

When the user need generate test report and testing journal sheet, directly entering information derived module, selected corresponding template, and click information derives and gets final product.

Claims (4)

1. based on the Receive Ground Mat State Monitoring System of industrial computer, comprising:
The earth loop impedance test appearance is connected with center processor, is used for the test command of receiving center processor, measures the voltage and current signal of sign grounded screen industrial frequency AC parameter and it is fed back to center processor;
Direct current continuity test appearance is connected with center processor, is used for the test command of receiving center processor, measures the voltage and current signal of the direct current conducting resistance between the sign down conductor and it is fed back to center processor;
Center processor; Develop based on industrial computer; Be used for sending test command, receive the voltage and current signal of earth loop impedance test appearance and direct current continuity test appearance feedback, according to voltage and current calculated signals industrial frequency AC parameter and direct current conducting resistance to earth loop impedance test appearance and direct current continuity test appearance; And industrial frequency AC parameter and direct current conducting resistance carried out time and geographic statistical study, and the running status of grounded screen is carried out comprehensive assessment.
2. the Receive Ground Mat State Monitoring System based on industrial computer according to claim 1 is characterized in that, said center processor comprises that information acquisition and administration module, data analysis module, state estimation module and information derive module;
Information acquisition and administration module; Be used for the user and set test condition; Send corresponding test command according to test condition to earth loop impedance test appearance and direct current continuity test appearance, receive the electric current and the voltage signal of two testers feedback, calculating each electric parameter according to electric current and voltage signal is industrial frequency AC parameter and direct current conducting resistance; With each electric parameter and corresponding test condition association store, and supply the user to do bookkeeping;
Data analysis module; Be used for the electric parameter of data analysis module stores is carried out time and geographic statistical study, so that the user grasps the geographic distribution statistical information of grounded screen each item electric parameter test point that trend and electric parameter are corresponding over time;
The state estimation module is used for according to the electric parameter of data analysis module storage the grounded screen running status being carried out comprehensive assessment;
Information derives module, be used for imposing a condition according to the user optionally reading electric parameter, data analysis result and state estimation result from information acquisition and administration module, data analysis module and state estimation module, and the generation test report is or/and form.
3. the Receive Ground Mat State Monitoring System based on industrial computer according to claim 1; It is characterized in that said earth loop impedance test appearance comprises alien frequencies constant-current supply, current sensor, voltage sensor, electric current amplification and filtering circuit, voltage amplification and filtering circuit, an A/D transducer, DSP, first serial communication interface; Current sensor connects electric current and amplifies and filtering circuit; Voltage sensor connects voltage amplification and filtering circuit; The electric current amplification is connected an A/D transducer with filtering circuit respectively with voltage amplification and filtering circuit; The one A/D transducer connects DSP, and DSP connects center processor through first serial communication interface, and DSP also connects the alien frequencies constant-current supply.
4. the Receive Ground Mat State Monitoring System based on industrial computer according to claim 1; It is characterized in that said continuity test circuit comprises dc constant flowing power, current sampling circuit, current amplifier, voltage sampling circuit, voltage amplifier, the 2nd A/D transducer, microprocessor, second serial communication interface; Current sampling circuit connects the 2nd A/D transducer through current amplifier, and voltage sampling circuit connects the 2nd A/D transducer through voltage amplifier, and the 2nd A/D transducer connects microprocessor, and microprocessor connects industrial computer through second serial communication interface.
CN201210154829.8A 2012-05-18 2012-05-18 State monitoring system for grounding grid based on industrial personal computer CN102707167B (en)

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CN104678246A (en) * 2015-02-03 2015-06-03 国网上海市电力公司 Method and system for evaluating corrosion state of transformer substation grounding grid
CN104820144A (en) * 2015-04-17 2015-08-05 国家电网公司 Resistance reduction analysis and measure system applied to transformer station lightning-proof grounding system
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
CN105842576A (en) * 2016-03-23 2016-08-10 国网山东省电力公司潍坊供电公司 Earth-continuity remote control test device
CN107615086A (en) * 2015-04-15 2018-01-19 库珀技术公司 For system, the method and apparatus of the integrality for diagnosing electric conductor bearing system
CN108711938A (en) * 2018-06-06 2018-10-26 珠海金华辰机电科技有限公司 A kind of intelligent monitor system of traction institute earth mat
CN108767984A (en) * 2018-06-06 2018-11-06 中国铁路设计集团有限公司 A kind of traction institute earth mat intelligent monitoring device

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104678246A (en) * 2015-02-03 2015-06-03 国网上海市电力公司 Method and system for evaluating corrosion state of transformer substation grounding grid
CN104678246B (en) * 2015-02-03 2017-10-27 国网上海市电力公司 A kind of grounding net of transformer substation etch state appraisal procedure and its system
CN107615086A (en) * 2015-04-15 2018-01-19 库珀技术公司 For system, the method and apparatus of the integrality for diagnosing electric conductor bearing system
CN104820144A (en) * 2015-04-17 2015-08-05 国家电网公司 Resistance reduction analysis and measure system applied to transformer station lightning-proof grounding system
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
CN105842576A (en) * 2016-03-23 2016-08-10 国网山东省电力公司潍坊供电公司 Earth-continuity remote control test device
CN105842576B (en) * 2016-03-23 2018-06-15 国网山东省电力公司潍坊供电公司 Earth-continuity remote-controlled test device
CN108711938A (en) * 2018-06-06 2018-10-26 珠海金华辰机电科技有限公司 A kind of intelligent monitor system of traction institute earth mat
CN108767984A (en) * 2018-06-06 2018-11-06 中国铁路设计集团有限公司 A kind of traction institute earth mat intelligent monitoring device

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