CN112305491B - Multi-loop switching method - Google Patents
Multi-loop switching method Download PDFInfo
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- CN112305491B CN112305491B CN202011188609.8A CN202011188609A CN112305491B CN 112305491 B CN112305491 B CN 112305491B CN 202011188609 A CN202011188609 A CN 202011188609A CN 112305491 B CN112305491 B CN 112305491B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012795 verification Methods 0.000 claims abstract description 65
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
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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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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a multi-loop switching method, which comprises the following steps: the first switching element and the second switching element in the switching device are regulated, so that voltage and current signals of the electric energy meter at the gateway to be tested are connected in parallel to the verification instrument; adjusting a second switching element in the switching device to change the current signal of the electric energy meter at the gateway to be tested from parallel connection into series connection; a third switching element in the switching device is regulated, so that pulse signals of the electric energy meter of the gateway to be detected are connected in parallel to the verification instrument; after the detection is finished, the first switching element and the third switching element in the switching device are adjusted to disconnect pulse signals and voltage signal channels between the electric energy meter of the gateway to be detected and the verification instrument, and the second switching element in the switching device is adjusted according to a fourth command signal to enable current signals of the electric energy meter of the gateway to be detected to be connected in parallel to the verification instrument, the second switching element in the switching device is continuously adjusted, and finally the current signal channels between the electric energy meter of the gateway to be detected and the verification instrument are 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 measuring and checking the gateway electric energy meters of a plurality of secondary metering loops, each loop needs to be manually connected one by one and tested, and certain potential safety hazards exist in the test connection process; the periodic detection mode is passive, the detection result may be normal when the detection loop does not fail, but the detection result may not be found in time when the loop fails, and the existing detection 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, which solves the above-mentioned problems of the prior art.
The invention is realized by the following technical scheme: a multi-loop switching method comprising the steps of:
constructing a detection circuit comprising a plurality of gateway electric energy meters, a switching device and a verification instrument;
according to the first instruction signal, a first switching element and a second switching element in the switching device are regulated, so that voltage and current signals of the electric energy meter of the gateway to be tested are connected in parallel to the verification instrument;
according to the second instruction signal, a second switching element in the switching device is regulated, so that the current signal of the electric energy meter at the gateway to be tested is changed from parallel connection into serial connection and is connected into the verification instrument;
according to a third instruction signal, a third switching element in the switching device is regulated, so that pulse signals of the electric energy meter of the gateway to be detected are connected in parallel to the verification instrument, and the verification instrument detects the electric energy meter of the gateway to be detected;
after the detection is finished, a first switching element and a third switching element in the switching device are adjusted to disconnect pulse signals and voltage signal channels between the electric energy meter of the gateway to be detected and the verification instrument, a second switching element in the switching device is adjusted according to a fourth command signal to change the current signals of the electric energy meter of the gateway to be detected from serial connection into parallel connection into the verification instrument, the second switching element in the switching device is continuously adjusted according to a fifth command signal, and finally the current signal channels between the electric energy meter of the gateway to be detected and the verification instrument are cut off.
Preferably, the gateway electric energy meter is respectively coupled with the corresponding secondary metering loop.
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 electric energy meter at the gateway to be detected are connected in parallel to the verification instrument, the verification instrument sends a second instruction signal for confirming 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 the voltage signal of the electric energy meter at the gateway to be tested is connected in parallel to the verification instrument, and the current signal is connected in series to the verification instrument.
Preferably, the fourth instruction signal is used for confirming that a pulse signal and voltage signal channel between the electric energy meter and the verification instrument at the gateway to be detected is disconnected.
Preferably, the fifth instruction signal is used for confirming that the current signal of the electric energy meter at the gateway to be tested is changed from serial connection to parallel connection to the verification instrument.
Preferably, the switching device comprises a controller, wherein the controller is used for controlling the first switching element, the second switching element and the third switching element, and the controller is in signal connection with the industrial personal computer.
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 verification and detection of a set of electric energy meter verification instrument on multi-loop multi-verification targets, change the verification mode of the electric energy meter on site and improve the verification efficiency and safety on site.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only preferred embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a multi-loop switching method provided by the invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific examples are provided below and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1, a multi-loop switching method includes the following steps:
s1, a detection circuit comprising N gateway electric energy meters, a switching device and a verification instrument is constructed, 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 into the verification instrument through the switching device.
It should be noted that, the verification instrument is a verification instrument of a gateway electric energy meter, and the switching device comprises a controller, a first switching element, a second switching element and a third switching element, and the controller is connected with the industrial personal computer through signals;
the first switching element is used for connecting a voltage signal end of the gateway electric energy meter to be tested into the verification instrument;
the second switching element is a double-control switching element and is used for communicating the electric energy meter of the gateway to be detected with the corresponding secondary metering loop and can also be used for enabling a current signal of the electric energy meter of the gateway to be detected to be accessed into the verification instrument;
the third switching element is used for enabling the pulse signal of the electric energy meter of the gateway to be tested to be accessed into the verification instrument.
The first, second, third switching elements include relays or other switching elements.
S2, when a certain gateway electric energy meter is required to be checked, the gateway electric energy meter is used for acquiring voltage and current signals in a secondary metering loop, after connection is completed, a control command 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 a verification instrument, and the verification instrument feeds back a first command signal for confirming that the switching device and the verification instrument are in a normal connection state to the switching device;
according to the first instruction signal, the controller adjusts the first switching element and the second switching element, so that voltage and current signals of the electric energy meter of the gateway to be detected are connected in parallel to the verification instrument.
And S3, when the voltage and current signals of the electric energy meter at the gateway to be detected are connected in parallel to the verification instrument, the verification instrument sends a second instruction signal for confirming successful connection of the voltage and current signals to the switching device through the RS485 port of the verification instrument, and according to the second instruction signal, the controller adjusts the second switching element to disconnect a current signal channel between the electric energy meter at the gateway to be detected and the secondary metering loop, so that the current signal of the electric energy meter at the gateway to be detected is changed from parallel connection to serial connection to the verification instrument.
S4, when the controller of the switching device receives a third instruction signal for confirming that a voltage signal of the electric energy meter of the gateway to be detected is connected in parallel to the verification instrument and a current signal of the electric energy meter of the gateway to be detected is connected in series to the verification instrument, the switching device adjusts a third switching element, and connects a pulse signal of the electric energy meter of the gateway to be detected in parallel to the verification instrument, at the moment, the electric energy meter of the gateway of the secondary metering loop of the appointed line and the verification instrument acquire the same metering test signal, and then the electric energy meter of the gateway can be verified on site;
after the detection is finished, the switching device adjusts the first switching element and the third switching element, so that pulse signals and voltage signal channels between the electric energy meter and the verification instrument at the gateway to be detected are disconnected.
And 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 electric energy meter of the gateway to be detected and the verification instrument are cut off, adjusting a second switching element in the switching device to change the current signal of the electric energy meter of the gateway to be detected from serial connection into parallel connection into the verification instrument, adjusting the second switching element after determining that the current signal of the electric energy meter of the gateway to be detected is parallel connected into the verification instrument, cutting off a current signal channel between the electric energy meter of the gateway to be detected and the verification instrument, and finally enabling the electric energy meter of the gateway to be detected and a corresponding secondary metering loop to be restored to an initial state.
And S6, after the detection of one gateway electric energy meter is completed, the detection of the other gateway electric energy meter is realized according to the steps of S2-S5, and the switching detection of N gateway electric energy meters is realized by analogy.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (8)
1. A multi-loop switching method, comprising the steps of:
s1, constructing a detection circuit comprising a plurality of gateway electric energy meters, a switching device and a verification instrument;
s2, according to a first instruction signal, a first switching element and a second switching element in a switching device are adjusted, so that a voltage signal and a current signal of an electric energy meter of a gateway to be detected are connected in parallel to the verification instrument;
s3, according to a second instruction signal, a second switching element in the switching device is adjusted, so that a current signal of the electric energy meter at the gateway to be tested is changed from parallel connection into serial connection and is connected into the verification instrument;
s4, adjusting a third switching element in the switching device according to a third instruction signal to enable a pulse signal of the electric energy meter of the gateway to be detected to be connected into the verification instrument in parallel, detecting the electric energy meter of the gateway to be detected by the verification instrument, and adjusting the first switching element and the third switching element in the switching device after the detection is finished to enable a pulse signal and voltage signal channel between the electric energy meter of the gateway to be detected and the verification instrument to be disconnected;
s5, adjusting a second switching element in the switching device according to a fourth command signal to change a current signal of the electric energy meter at the gateway to be tested from serial connection into parallel connection to be connected into the verification instrument, continuously adjusting the second switching element in the switching device according to a fifth command signal, and finally cutting off a current signal channel between the electric energy meter at the gateway to be tested and the verification instrument;
and S6, after the detection of one gateway electric energy meter is completed, the detection of the other gateway electric energy meter is realized according to the steps of S2-S5, and the switching detection of a plurality of gateway electric energy meters is realized by analogy.
2. The multi-loop switching method according to claim 1, wherein the gateway electric energy meters are respectively coupled with corresponding secondary metering loops.
3. The multi-circuit switching method according to claim 2, wherein the switching device transmits a connection confirmation signal to the certification instrument according to a control instruction from an industrial personal computer or an operator, and the certification instrument feeds back a first instruction 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 electric energy meter at the gateway to be tested are connected in parallel to the verification instrument, the verification instrument sends a second instruction signal for confirming 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 for confirming that a voltage signal of an electric energy meter of a gateway to be tested has been connected in parallel to the verification instrument and that a current signal has been connected in series to the verification instrument.
6. The multi-loop switching method according to claim 1, wherein the fourth command signal is used for confirming that a pulse signal and a voltage signal channel between the electric energy meter and the verification instrument of the gateway to be tested are disconnected.
7. The multi-loop switching method according to claim 1, wherein the fifth command signal is used for confirming that a current signal of the electric energy meter of the gateway to be tested is changed from serial 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, the controller is used for controlling the first switching element, the second switching element and the third switching 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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| CN112305491B true CN112305491B (en) | 2023-12-29 |
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| 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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