CN105203987A - Long-distance detection device and method for electric energy measurement of transformer substation - Google Patents
Long-distance detection device and method for electric energy measurement of transformer substation Download PDFInfo
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- CN105203987A CN105203987A CN201510702537.7A CN201510702537A CN105203987A CN 105203987 A CN105203987 A CN 105203987A CN 201510702537 A CN201510702537 A CN 201510702537A CN 105203987 A CN105203987 A CN 105203987A
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Abstract
The invention relates to long-distance detection equipment for electric energy measurement of a transformer substation, in particular to a long-distance detection device and method for electric energy measurement of the transformer substation. The technical scheme lies in that the long-distance detection device comprises an electric energy meter, a data acquisition module, a microprocessor, an LCD display memory, a communicator and a computer, wherein the electric energy meter is connected with the data acquisition module, the data acquisition module is used for transmitting acquired data to the microprocessor through a transmission line, the microprocessor is connected with the LCD display memory, and the microprocessor is used for connecting processed signals to the computer through the communicator. The invention has benefits that manpower, material resources and time are saved greatly; repeated and frequent operations in field inspection reduce the damage to a connection terminal, and relatively serious potential safety hazards are avoided; live working is provided to a worker; the working safety and the service life of equipment are improved.
Description
Technical field
The present invention relates to the long-range calibration equipment of a kind of transformer station electric energy metrical, particularly the long-range calibration equipment of a kind of transformer station electric energy metrical and method.
Background technology
Electric-power metering management is the important step of electric power enterprise Production&Operations Management and electric power netting safe running, its technology and management level are not only concerning development and the corporate image of electric power enterprise, and the accurate of clearing that affect trade, just, relate to the interests of numerous clients, annual needs carry out regular on-the-spot test work to the electric power meter of each transformer station, the manpower of at substantial, material resources and time, during site inspection repeatedly, processing ease causes pair of wire connection terminals to produce damage frequently, there is larger potential safety hazard, staff's hot line job, certain security risk is existed to equipment and personnel itself.
Electric power meter breaks down, mistake, people is for stealing etc., that all impact is measured is accurate, and the accuracy of field wiring, not only depend on the skill level of the working sense of responsibility of dress table personnel, professional skill and work, and due to individual clients law, regulation consciousness talk thin, have a mind to stealing, deliberately cause measuring apparatus wiring error, directly have influence on the accuracy of metering; Therefore how correctly, search the wiring error of electric power meter fast, being not only an important content of electric energy metrical work, is also the indispensable regulations that power utility check personnel should possess.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, the long-range calibration equipment of a kind of transformer station electric energy metrical and method are provided, save a large amount of human and material resources and time, operate repeatedly, frequently during site inspection and decrease pair of wire connection terminals generation damage.
Its technical scheme is: comprise electric energy meter, data acquisition module, microprocessor, LCD display-memory, communicator, computer, electric energy meter connection data acquisition module, the data of collection are transported to microprocessor by transmission line by data acquisition module, microprocessor connects LCD display-memory, and the signal of process is connected to computer by communicator by microprocessor;
Microprocessor comprises master data processor, integrating metrology chip, master data processor connects integrating metrology chip, integrating metrology chip adopts SA9904B, master data processor connects pulse output signals, master data processor connects power cut-off recording battery and realize power failure operation, by communication interface connecting communication device.
A using method for the long-range calibration equipment of transformer station's electric energy metrical, is characterized in that: comprise following step:
A) measure the error of on-the-spot one group of electric energy meter, once circuit installs, the test of error is without the need to manually showing up, and without the need to wiring again, data pass main website back automatically, provides error overload alarm; Can to one group of electric energy meter loop test, also can to certain only specific electric energy meter test; The parameter such as meter constant, category of test (meritorious, idle or active reactive test) of the interval of loop test, the test number of turns, tested ammeter can by telecommunication means, and the daemon software support of dependence main website realizes; Support that phase three-wire three, three-phase and four-line are measured, the interference of transformer station is the key factor needing to consider, because electric system adopts three-wire type transmission of electricity, the three-dimension type of circuit and equipment is arranged and is made the Distribution of Magnetic Field around power equipment very complicated, estimate on-the-spot interference, the pulse of electric energy meter is introduced and should be chosen shielding line; By arranging, system can be tested an independent table, also can carry out loop test to one group of table, and the storage of data and display are except can except this locality realizes, also data be can pass back main website by means of telecommunication, the download of data, storage, function setting, error overload alarm realized;
B) test of secondary circuit voltage drop
The error caused due to Voltage Transformer Secondary Circuit Voltage Drop is dynamic, therefore it plays leading role to the contribution of Electric Energy Tariff Point Metering Device composition error; Wherein, contact resistance between fuse and deck increases, and being affects the important labile factor that secondary circuit voltage falls, and As time goes on, the resistance of voltage fuse itself also can along with increase; The contact resistance etc. of the contact resistance of the thickness of wire and selection relay contact, terminal block and voltage conductor, all can form impact to the voltage drop of Secondary Circuit of Potential Transformer, thus affect the composition error of electric power meter in addition;
The actual test to PT secondary voltage drop, system directly adopts the method introducing wiring at PT leading-out terminal and electrical energy meter electricity pressure side, two-way voltage signal is sent into microprocessor and carries out testing and voltage difference both calculating and phase angle difference; When pressure drop exceedes the threshold value preset, system reminds back-stage management personnel by remote alarming function automatically;
C) CT and the monitoring of secondary circuit working condition
Because the working condition of CT secondary circuit reflects by secondary impedance, as occurred that impedance is increased when loop, then illustrate that line contacts resistance increases; When impedance loop reduces, then may reflect that turn-to-turn open circuit etc. appears in CT inside, therefore assess the working condition of CT secondary circuit by the method for Impedance measurement or admittance; Native system adopts the method for high-frequency test admittance to realize the detection of secondary circuit state, and whole test process does not affect the normal operation of secondary circuit, when tank admittance occurs abnormal, by pre-setting thresholding admittance to judge and reporting to the police.
The invention has the beneficial effects as follows: save a large amount of human and material resources and time, operate repeatedly, frequently during site inspection and decrease pair of wire connection terminals generation damage, avoid producing larger potential safety hazard, staff's hot line job, improve the serviceable life of security to operation and equipment.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is structural representations of microprocessor;
In upper figure: electric energy meter 1, data acquisition module 2, microprocessor 3, LCD display-memory 4, communicator 5, computer 6.
Embodiment
1-2 by reference to the accompanying drawings, the invention will be further described:
The long-range calibration equipment of a kind of transformer station electric energy metrical that the present invention mentions, comprise electric energy meter 1, data acquisition module 2, microprocessor 3, LCD display-memory 4, communicator 5, computer 6, electric energy meter 1 connection data acquisition module 2, the data of collection are transported to microprocessor 3 by transmission line by data acquisition module 2, microprocessor 3 connects LCD display-memory 4, and the signal of process is connected to computer 6 by communicator 5 by microprocessor 3;
Microprocessor comprises master data processor, integrating metrology chip, master data processor connects integrating metrology chip, integrating metrology chip adopts SA9904B, master data processor connects pulse output signals, master data processor connects power cut-off recording battery and realize power failure operation, by communication interface connecting communication device 5.
The using method of the long-range calibration equipment of a kind of transformer station electric energy metrical that the present invention mentions, comprises following step:
A) measure the error of on-the-spot one group of electric energy meter, once circuit installs, the test of error is without the need to manually showing up, and without the need to wiring again, data pass main website back automatically, provides error overload alarm; Can to one group of electric energy meter loop test, also can to certain only specific electric energy meter test; The parameter such as meter constant, category of test (meritorious, idle or active reactive test) of the interval of loop test, the test number of turns, tested ammeter can by telecommunication means, and the daemon software support of dependence main website realizes; Support that phase three-wire three, three-phase and four-line are measured, the interference of transformer station is the key factor needing to consider, because electric system adopts three-wire type transmission of electricity, the three-dimension type of circuit and equipment is arranged and is made the Distribution of Magnetic Field around power equipment very complicated, estimate on-the-spot interference, the pulse of electric energy meter is introduced and should be chosen shielding line; By arranging, system can be tested an independent table, also can carry out loop test to one group of table, and the storage of data and display are except can except this locality realizes, also data be can pass back main website by means of telecommunication, the download of data, storage, function setting, error overload alarm realized;
B) test of secondary circuit voltage drop
The error caused due to Voltage Transformer Secondary Circuit Voltage Drop is dynamic, therefore it plays leading role to the contribution of Electric Energy Tariff Point Metering Device composition error; Wherein, contact resistance between fuse and deck increases, and being affects the important labile factor that secondary circuit voltage falls, and As time goes on, the resistance of voltage fuse itself also can along with increase; The contact resistance etc. of the contact resistance of the thickness of wire and selection relay contact, terminal block and voltage conductor, all can form impact to the voltage drop of Secondary Circuit of Potential Transformer, thus affect the composition error of electric power meter in addition;
The actual test to PT secondary voltage drop, system directly adopts the method introducing wiring at PT leading-out terminal and electrical energy meter electricity pressure side, two-way voltage signal is sent into microprocessor and carries out testing and voltage difference both calculating and phase angle difference; When pressure drop exceedes the threshold value preset, system reminds back-stage management personnel by remote alarming function automatically;
C) CT and the monitoring of secondary circuit working condition
Because the working condition of CT secondary circuit reflects by secondary impedance, as occurred that impedance is increased when loop, then illustrate that line contacts resistance increases; When impedance loop reduces, then may reflect that turn-to-turn open circuit etc. appears in CT inside, therefore assess the working condition of CT secondary circuit by the method for Impedance measurement or admittance; Native system adopts the method for high-frequency test admittance to realize the detection of secondary circuit state, and whole test process does not affect the normal operation of secondary circuit, when tank admittance occurs abnormal, by pre-setting thresholding admittance to judge and reporting to the police.
The above, be only part preferred embodiment of the present invention, any those of ordinary skill in the art all may utilize the technical scheme correct of above-mentioned elaboration or are revised as equivalent technical scheme.Therefore, any simple modification of carrying out according to technical scheme of the present invention or substitute equivalents, belong to the scope of protection of present invention to the greatest extent.
Claims (2)
1. the long-range calibration equipment of transformer station's electric energy metrical, it is characterized in that: comprise electric energy meter (1), data acquisition module (2), microprocessor (3), LCD display-memory (4), communicator (5), computer (6), electric energy meter (1) connection data acquisition module (2), the data of collection are transported to microprocessor (3) by transmission line by data acquisition module (2), microprocessor (3) connects LCD display-memory (4), and the signal of process is connected to computer (6) by communicator (5) by microprocessor (3);
Microprocessor comprises master data processor, integrating metrology chip, master data processor connects integrating metrology chip, integrating metrology chip adopts SA9904B, master data processor connects pulse output signals, master data processor connects power cut-off recording battery and realize power failure operation, by communication interface connecting communication device (5).
2. the using method of the long-range calibration equipment of a kind of transformer station electric energy metrical as claimed in claim 1, is characterized in that: comprise following step:
A) measure the error of on-the-spot one group of electric energy meter, once circuit installs, the test of error is without the need to manually showing up, and without the need to wiring again, data pass main website back automatically, provides error overload alarm; Can to one group of electric energy meter loop test, also can to certain only specific electric energy meter test; The parameter such as meter constant, category of test of the interval of loop test, the test number of turns, tested ammeter can, by telecommunication means, rely on the daemon software support of main website to realize; Support that phase three-wire three, three-phase and four-line are measured, the interference of transformer station is the key factor needing to consider, because electric system adopts three-wire type transmission of electricity, the three-dimension type of circuit and equipment is arranged and is made the Distribution of Magnetic Field around power equipment very complicated, estimate on-the-spot interference, the pulse of electric energy meter is introduced and should be chosen shielding line; By arranging, system can be tested an independent table, also can carry out loop test to one group of table, and the storage of data and display are except can except this locality realizes, also data be can pass back main website by means of telecommunication, the download of data, storage, function setting, error overload alarm realized;
B) test of secondary circuit voltage drop
The error caused due to Voltage Transformer Secondary Circuit Voltage Drop is dynamic, therefore it plays leading role to the contribution of Electric Energy Tariff Point Metering Device composition error; Wherein, contact resistance between fuse and deck increases, and being affects the important labile factor that secondary circuit voltage falls, and As time goes on, the resistance of voltage fuse itself also can along with increase; The contact resistance etc. of the contact resistance of the thickness of wire and selection relay contact, terminal block and voltage conductor, all can form impact to the voltage drop of Secondary Circuit of Potential Transformer, thus affect the composition error of electric power meter in addition;
The actual test to PT secondary voltage drop, system directly adopts the method introducing wiring at PT leading-out terminal and electrical energy meter electricity pressure side, two-way voltage signal is sent into microprocessor and carries out testing and voltage difference both calculating and phase angle difference; When pressure drop exceedes the threshold value preset, system reminds back-stage management personnel by remote alarming function automatically;
C) CT and the monitoring of secondary circuit working condition
Because the working condition of CT secondary circuit reflects by secondary impedance, as occurred that impedance is increased when loop, then illustrate that line contacts resistance increases; When impedance loop reduces, then may reflect that turn-to-turn open circuit etc. appears in CT inside, therefore assess the working condition of CT secondary circuit by the method for Impedance measurement or admittance; Native system adopts the method for high-frequency test admittance to realize the detection of secondary circuit state, and whole test process does not affect the normal operation of secondary circuit, when tank admittance occurs abnormal, by pre-setting thresholding admittance to judge and reporting to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510702537.7A CN105203987A (en) | 2015-10-27 | 2015-10-27 | Long-distance detection device and method for electric energy measurement of transformer substation |
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| CN201510702537.7A CN105203987A (en) | 2015-10-27 | 2015-10-27 | Long-distance detection device and method for electric energy measurement of transformer substation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436420A (en) * | 2016-05-27 | 2017-12-05 | 山东大学 | A kind of electric energy metrical remote verification monitoring system and its method of work |
| CN109557500A (en) * | 2019-01-15 | 2019-04-02 | 红相股份有限公司 | The online remote verification Intelligent calibration system of electric energy metering device based on data sharing |
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| CN202210151U (en) * | 2011-09-21 | 2012-05-02 | 四川省电力公司广安电业局 | System for remote checking and monitoring for electric energy metering device |
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| CN204269811U (en) * | 2014-12-17 | 2015-04-15 | 浙江涵普电力科技有限公司 | Electric energy meter remote online monitoring system |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201069470Y (en) * | 2007-07-20 | 2008-06-04 | 太原市优特奥科电子科技有限公司 | Real time online monitoring device for integrated error of high-voltage power calculation device |
| CN202210151U (en) * | 2011-09-21 | 2012-05-02 | 四川省电力公司广安电业局 | System for remote checking and monitoring for electric energy metering device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436420A (en) * | 2016-05-27 | 2017-12-05 | 山东大学 | A kind of electric energy metrical remote verification monitoring system and its method of work |
| CN109557500A (en) * | 2019-01-15 | 2019-04-02 | 红相股份有限公司 | The online remote verification Intelligent calibration system of electric energy metering device based on data sharing |
| CN109557500B (en) * | 2019-01-15 | 2024-02-06 | 红相股份有限公司 | Online remote verification intelligent verification system for electric energy metering device based on data sharing |
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