CN112305491A - Multi-loop switching method - Google Patents
Multi-loop switching method Download PDFInfo
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- CN112305491A CN112305491A CN202011188609.8A CN202011188609A CN112305491A CN 112305491 A CN112305491 A CN 112305491A CN 202011188609 A CN202011188609 A CN 202011188609A CN 112305491 A CN112305491 A CN 112305491A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012795 verification Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention provides a multi-loop switching method, which comprises the following steps: adjusting a first switch element and a second switch element in the switching device to enable voltage and current signals of the electric energy meter of the gateway to be detected to be connected into the calibrating instrument in parallel; adjusting a second switch element in the switching device to change the current signal of the electric energy meter of the gateway to be detected from parallel connection to serial connection to the calibrator; adjusting a third switch element in the switching device to enable pulse signals of the gateway electric energy meter to be detected to be connected into the calibrating instrument in parallel; after the detection is finished, the first switch element and the third switch element in the switching device are adjusted to disconnect the pulse signal and voltage signal channels between the gateway electric energy meter to be detected and the verification instrument, the second switch element in the switching device is adjusted according to the fourth instruction signal to enable the current signal of the gateway electric energy meter to be detected to be connected in parallel to the verification instrument, the second switch element in the switching device is continuously adjusted, and finally the current signal channel between the gateway electric energy meter to be detected and the verification instrument is cut off.
Description
Technical Field
The invention relates to the technical field of power verification, in particular to a multi-loop switching method.
Background
At present, when the gateway electric energy meters of a plurality of secondary metering loops are measured and checked, each loop needs to be manually wired and tested one by one, and a certain potential safety hazard exists in the wiring testing process; the regular detection mode is passive, the detection result is normal when the detection loop fails, but the detection result cannot be found in time when the loop fails, and the existing verification mode determines that only a single loop can be detected in unit time.
Disclosure of Invention
The present invention is directed to a multi-loop switching method to solve the above problems in the prior art.
The invention is realized by the following technical scheme: a multi-loop switching method comprises the following steps:
constructing a detection circuit comprising a plurality of gateway electric energy meters, a switching device and a calibration instrument;
adjusting a first switch element and a second switch element in the switching device according to the first instruction signal, so that voltage and current signals of the electric energy meter of the gate to be detected are connected in parallel to the calibrating instrument;
according to the second instruction signal, a second switch element in the switching device is adjusted, so that the current signal of the electric energy meter of the gateway to be detected is changed from parallel connection to serial connection to the calibrating instrument;
adjusting a third switch element in the switching device according to a third instruction signal to enable pulse signals of the gateway electric energy meter to be detected to be connected into the calibrating instrument in parallel, and detecting the gateway electric energy meter to be detected by the calibrating instrument;
after the detection is finished, the first switch element and the third switch element in the switching device are adjusted to disconnect a pulse signal channel and a voltage signal channel between the gateway electric energy meter to be detected and the verification instrument, the second switch element in the switching device is adjusted according to a fourth instruction signal to change a current signal of the gateway electric energy meter to be detected from series connection to parallel connection to the verification instrument, the second switch element in the switching device is continuously adjusted according to a fifth instruction signal, and finally the current signal channel between the gateway electric energy meter to be detected and the verification instrument is cut off.
Preferably, the gateway electric energy meters are respectively coupled with the corresponding secondary metering loops.
Preferably, according to a control instruction from an industrial personal computer or an operator, the switching device sends a connection confirmation signal to the verification instrument, and the verification instrument feeds back a first instruction signal for confirming the connection state to the switching device.
Preferably, when the voltage and current signals of the gateway electric energy meter to be detected are connected in parallel to the calibrating instrument, the calibrating instrument sends a second instruction signal for confirming the successful connection of the voltage and current signals to the switching device through the RS485 port.
Preferably, the third instruction signal is used for confirming that a voltage signal of the gateway electric energy meter to be detected is connected to the verification instrument in parallel and a current signal is connected to the verification instrument in series.
Preferably, the fourth instruction signal is used for confirming that a pulse signal channel and a voltage signal channel between the gateway electric energy meter to be detected and the verification instrument are disconnected.
Preferably, the fifth instruction signal is used for confirming that the current signal of the gateway electric energy meter to be detected is changed from being connected in series to being connected in parallel to the verification instrument.
Preferably, the switching device comprises a controller, the controller is used for controlling the first switch element, the second switch element and the third switch element, and the controller is connected with the industrial personal computer through signals.
Compared with the prior art, the invention has the following beneficial effects:
the multi-loop switching method provided by the invention can realize real-time detection and detection of a set of electric energy meter calibrating instrument on a multi-loop multi-calibrating target, change the field electric energy meter calibrating mode and improve the field calibrating efficiency and safety.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart of a multi-loop switching method according to the present invention.
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.
Referring to fig. 1, a multi-loop switching method includes the following steps:
s1, constructing a detection circuit comprising N gateway electric energy meters, a switching device and a verification instrument, wherein one gateway electric energy meter is respectively coupled with a corresponding secondary metering loop, and the N gateway electric energy meters are all connected to the verification instrument through the switching device.
The calibration instrument is a calibration instrument of a gateway electric energy meter, the switching device comprises a controller, a first switch element, a second switch element and a third switch element, and the controller is in signal connection with the industrial personal computer;
the first switch element is used for connecting a voltage signal end of the gateway electric energy meter to be detected to the calibrating instrument;
the second switch element is a double-control switch element and is used for communicating the gateway electric energy meter to be detected with a corresponding secondary metering loop and simultaneously connecting a current signal end of the gateway electric energy meter to be detected into a calibrating instrument;
and the third switch element is used for connecting the pulse signal end of the gateway electric energy meter to be detected into the calibrating instrument.
The first, second, and third switching elements include relays or other switching elements.
S2, when a certain gateway electric energy meter needs to be checked, the gateway electric energy meter is used for acquiring voltage and current signals in a secondary metering loop, after connection is finished, a control instruction is sent to a controller of a switching device through an industrial personal computer or an operator, the switching device sends a connection confirmation signal to the calibrating instrument, and the calibrating instrument feeds back a first instruction signal for confirming that the switching device and the calibrating instrument are in a normal connection state to the switching device;
and according to the first instruction signal, the controller adjusts the first switch element and the second switch element, so that voltage and current signals of the electric energy meter of the gate to be detected are connected into the calibrating instrument in parallel.
S3, when the voltage and current signals of the gateway electric energy meter to be detected are connected in parallel to the calibrating instrument, the calibrating instrument sends a second instruction signal for confirming the successful connection of the voltage and current signals to the switching device through the RS485 port of the calibrating instrument, and according to the second instruction signal, the controller adjusts the second switch element to disconnect the current signal channel between the gateway electric energy meter to be detected and the secondary metering loop, so that the current signals of the gateway electric energy meter to be detected are connected in series from the parallel connection.
S4, when the controller of the switching device receives a third instruction signal for confirming that the voltage signal of the gateway electric energy meter to be tested is connected in parallel to the calibrating instrument and the current signal is connected in series to the calibrating instrument, the switching device adjusts a third switch element, the pulse signal of the gateway electric energy meter to be tested is connected in parallel to the calibrating instrument, and at the moment, the gateway electric energy meter of the secondary metering loop of the specified line and the calibrating instrument obtain the same metering test signal, so that the gateway electric energy meter can be calibrated on site;
after the detection is finished, the switching device adjusts the first switch element and the third switch element, so that a pulse signal channel and a voltage signal channel between the gateway electric energy meter to be detected and the calibrating instrument are disconnected.
S5, when the controller of the switching device receives a fourth instruction signal for confirming that a pulse signal and a voltage signal channel between the gateway electric energy meter to be detected and the verification instrument are cut off, adjusting a second switch element in the switching device to change the series connection access of the current signal of the gateway electric energy meter to be detected into the parallel connection access of the verification instrument, after the parallel connection access of the current signal of the gateway electric energy meter to be detected to the verification instrument is confirmed, adjusting the second switch element to cut off the current signal channel between the gateway electric energy meter to be detected and the verification instrument, and finally enabling the gateway electric energy meter to be detected and a corresponding secondary metering loop to be recovered to the initial state.
And S6, after the detection of one gateway electric energy meter is finished, detecting another gateway electric energy meter according to the steps S2-S5, and the like to realize the switching detection of N gateway electric energy meters.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A multi-loop switching method is characterized by comprising the following steps:
s1, constructing a detection circuit comprising a plurality of gateway electric energy meters, a switching device and a calibrating instrument;
s2, adjusting a first switch element and a second switch element in the switching device according to the first instruction signal, so that voltage and current signals of an electric energy meter of a gateway to be detected are connected in parallel to the detector;
s3, adjusting a second switch element in the switching device according to the second instruction signal to change the current signal of the electric energy meter of the gate to be detected from parallel connection to serial connection to the calibrating instrument;
s4, adjusting a third switch element in the switching device according to a third instruction signal to enable a pulse signal of the gateway electric energy meter to be detected to be connected into the verification instrument in parallel, detecting the gateway electric energy meter to be detected by the verification instrument, and after the detection is finished, adjusting the first switch element and the third switch element in the switching device to disconnect the pulse signal and voltage signal channels between the gateway electric energy meter to be detected and the verification instrument;
s5, adjusting a second switch element in the switching device according to the fourth instruction signal to change the current signal of the gateway electric energy meter to be detected from series connection to parallel connection to the verification instrument, continuously adjusting the second switch element in the switching device according to the fifth instruction signal, and finally cutting off a current signal channel between the gateway electric energy meter to be detected and the verification instrument;
and S6, after the detection of one gateway electric energy meter is finished, detecting another gateway electric energy meter according to the steps S2-S5, and the like to realize the switching detection of a plurality of gateway electric energy meters.
2. The multi-loop switching method according to claim 1, wherein the gateway electric energy meters are respectively coupled to corresponding secondary metering loops.
3. The multi-loop switching method according to claim 2, wherein the switching device sends a connection confirmation signal to the verification instrument according to a control command from an industrial personal computer or an operator, and the verification instrument feeds back a first command signal for confirming a connection state to the switching device.
4. The multi-loop switching method according to claim 2, wherein when the voltage and current signals of the gateway electric energy meter to be tested are connected in parallel to the calibration instrument, the calibration instrument sends a second command signal for confirming the successful connection of the voltage and current signals to the switching device through the RS485 port.
5. The multi-loop switching method according to claim 1, wherein the third command signal is used to confirm that the voltage signal of the gateway electric energy meter to be tested has been connected to the verification instrument in parallel and the current signal has been connected to the verification instrument in series.
6. The multi-loop switching method as claimed in claim 1, wherein the fourth command signal is used to confirm that the pulse signal and voltage signal paths between the electric energy meter of the gateway to be tested and the calibration instrument are disconnected.
7. The multi-loop switching method as claimed in claim 1, wherein the fifth command signal is used to confirm that the current signal of the gateway electric energy meter to be tested is switched from series connection to parallel connection to the verification instrument.
8. A multi-loop switching method according to claim 3, wherein the switching device comprises a controller for controlling the first switch element, the second switch element and the third switch element, and the controller is in signal connection with the industrial personal computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011188609.8A CN112305491B (en) | 2020-10-30 | 2020-10-30 | Multi-loop switching method |
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| CN202011188609.8A CN112305491B (en) | 2020-10-30 | 2020-10-30 | Multi-loop switching method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236456A (en) * | 2021-11-11 | 2022-03-25 | 云南电网有限责任公司 | Double-loop single-phase electric energy meter calibrating device and method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001337117A (en) * | 2000-05-30 | 2001-12-07 | Toshiba Corp | Electronic watthour meter |
| CN102135608A (en) * | 2011-01-29 | 2011-07-27 | 四川电力科学研究院 | Electric energy metering and monitoring system of intelligent gateway |
| CN202351422U (en) * | 2011-11-18 | 2012-07-25 | 厦门红相电力设备股份有限公司 | Automatic detection device of electric energy metering device |
| CN202710744U (en) * | 2012-08-14 | 2013-01-30 | 河南弘正电气科技有限公司 | Main station structure of station electrical energy metering device monitoring management system |
| CN103630868A (en) * | 2013-09-23 | 2014-03-12 | 中国电子科技集团公司第二十七研究所 | Remote substation electrical energy metering information detection system |
| EP2720063A1 (en) * | 2012-10-12 | 2014-04-16 | ALSTOM Transport SA | Automatic calibration of energy meter central unit |
| CN105319529A (en) * | 2015-12-04 | 2016-02-10 | 国网电力科学研究院武汉南瑞有限责任公司 | System and method for calibrating errors of watt-hour meters |
| CN205157765U (en) * | 2015-12-04 | 2016-04-13 | 国网电力科学研究院武汉南瑞有限责任公司 | Electric energy meter error calibration system |
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| CN206379957U (en) * | 2016-12-21 | 2017-08-04 | 海南电网有限责任公司 | Electric energy meter field service terminal |
| CN111323741A (en) * | 2020-04-13 | 2020-06-23 | 湖南省计量检测研究院 | Indirect access type direct current electric energy meter calibrating device and method |
| US20200309829A1 (en) * | 2019-04-01 | 2020-10-01 | Dake He | On-line monitoring system for the performance of the measurement equipment in the entire power grid based on wide-area synchronous measurement |
-
2020
- 2020-10-30 CN CN202011188609.8A patent/CN112305491B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001337117A (en) * | 2000-05-30 | 2001-12-07 | Toshiba Corp | Electronic watthour meter |
| CN102135608A (en) * | 2011-01-29 | 2011-07-27 | 四川电力科学研究院 | Electric energy metering and monitoring system of intelligent gateway |
| CN202351422U (en) * | 2011-11-18 | 2012-07-25 | 厦门红相电力设备股份有限公司 | Automatic detection device of electric energy metering device |
| CN202710744U (en) * | 2012-08-14 | 2013-01-30 | 河南弘正电气科技有限公司 | Main station structure of station electrical energy metering device monitoring management system |
| EP2720063A1 (en) * | 2012-10-12 | 2014-04-16 | ALSTOM Transport SA | Automatic calibration of energy meter central unit |
| CN103630868A (en) * | 2013-09-23 | 2014-03-12 | 中国电子科技集团公司第二十七研究所 | Remote substation electrical energy metering information detection system |
| CN105319529A (en) * | 2015-12-04 | 2016-02-10 | 国网电力科学研究院武汉南瑞有限责任公司 | System and method for calibrating errors of watt-hour meters |
| CN205157765U (en) * | 2015-12-04 | 2016-04-13 | 国网电力科学研究院武汉南瑞有限责任公司 | Electric energy meter error calibration system |
| CN206379957U (en) * | 2016-12-21 | 2017-08-04 | 海南电网有限责任公司 | Electric energy meter field service terminal |
| CN106918799A (en) * | 2017-04-12 | 2017-07-04 | 华北电力科学研究院有限责任公司 | Electric energy meter remote checking method and system |
| US20200309829A1 (en) * | 2019-04-01 | 2020-10-01 | Dake He | On-line monitoring system for the performance of the measurement equipment in the entire power grid based on wide-area synchronous measurement |
| CN111323741A (en) * | 2020-04-13 | 2020-06-23 | 湖南省计量检测研究院 | Indirect access type direct current electric energy meter calibrating device and method |
Non-Patent Citations (1)
| Title |
|---|
| 谭清: "关口电能表现场校验方法分析", 《内蒙古电力技术》, vol. 31, no. 4, pages 7 - 13 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236456A (en) * | 2021-11-11 | 2022-03-25 | 云南电网有限责任公司 | Double-loop single-phase electric energy meter calibrating device and method |
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