CN108226848B - Electric energy meter error correction system and method - Google Patents
Electric energy meter error correction system and method Download PDFInfo
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- CN108226848B CN108226848B CN201810025894.8A CN201810025894A CN108226848B CN 108226848 B CN108226848 B CN 108226848B CN 201810025894 A CN201810025894 A CN 201810025894A CN 108226848 B CN108226848 B CN 108226848B
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- electric energy
- energy meter
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- correction method
- bypass
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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
Abstract
The invention discloses an electric energy meter error correction system and method. The system comprises a plurality of bypass devices and a signal generating device, wherein the number of the bypass devices is equal to that of the electric energy meters, and the bypass devices are connected in parallel to two sides of a control switch of the electric energy meters and used for bypassing the control switch and receiving power carrier signals; the signal generating device is arranged at a knife switch of a residential user and used for sending out a specific power carrier signal. The control switch of the electric energy meter is bypassed by the bypass device, so that the normal power supply of a resident user is not influenced during error correction; the bypass device is arranged at the control switch of each electric energy meter, the side wiring of an electric meter box is not required to be changed, and only the signal generating devices are arranged at each household user side one by one, so that the association matching between the electric energy meters and users can be completed, the error correction efficiency is high, and the workload is small.
Description
Technical Field
The invention belongs to the field of power systems, and particularly relates to an electric energy meter error correction system and method.
Background
At present, when a power supply company intensively installs the electric energy meter for residential users in a batch manner, the distribution lines are mostly embedded in the building wall and cannot be observed due to the fact that a certain distance still exists between the low-voltage electric meter box and each household user, and therefore the possibility that the association error between the household number of the electric energy meter and the actually charged user number exists. Once such a problem occurs, disputes between the power consumers and the power supply companies are easily caused, and the good image of the power supply service of the power supply companies is affected. In order to avoid such errors, the power supply company usually needs to check and confirm the user number and the user number of its electric energy meter before the user formally uses the electricity.
Power line carrier communication is a communication method that realizes communication mainly by using a power line as a medium for communication. The existing problems about matching of lines and electric energy meters are all completed by a mode of receiving specific signals, namely, a signal transmitter is arranged at one side needing to be detected, a signal receiver is arranged at the other side, and the signals are transmitted through a power line. The two parts match correctly if the signal receiver accepts a particular signal from the signal transmitter. However, the premise of using the method is that the control switches of all the electric energy meters in the electric meter box must be disconnected, that is, the detection must be carried out in a power failure mode of all users, and the method is not suitable for power supply occasions which operate in a wrong association state for a long time; moreover, the existing detection method usually needs to perform wiring, measurement and comparison for many times on the electric meter box and the user side to realize final matching, so that the error correction efficiency is low, and the workload is huge.
Disclosure of Invention
The invention aims to provide an electric energy meter error correction system and method to improve the intelligent level and efficiency of electric energy meter installation error correction.
The technical solution for realizing the purpose of the invention is as follows: an electric energy meter error correction system comprises a plurality of bypass devices and a signal generating device, wherein the number of the bypass devices is equal to that of the electric energy meters, and the bypass devices are connected in parallel to two sides of a control switch of the electric energy meters and used for bypassing the control switch and receiving power carrier signals; the signal generating device is arranged at a knife switch of a residential user and used for sending out a specific power carrier signal.
An electric energy meter error correction method comprises the following steps:
step 1, respectively connecting a bypass device in parallel on two sides of each electric energy meter control switch, disconnecting all the control switches, closing access switches of all the bypass devices, and connecting the bypass devices in a user power supply loop in series;
step 2, installing a signal generating device on the primary side of a certain user disconnecting link, or installing a signal generating device on the secondary side of the disconnecting link, and closing the corresponding disconnecting link;
step 3, enabling the signal generating device to transmit power carrier signals, monitoring the receiving conditions of the bypass devices on the two sides of each control switch, and obtaining the matching relation between the user and the electric energy meter;
and 4, repeating the steps 2-3 until the installation and error correction of all the user electric energy meters are completed.
Compared with the prior art, the invention has the following remarkable advantages: 1) the control switch of the electric energy meter is bypassed by the bypass device, so that the normal power supply of a resident user is not influenced during error correction; 2) the invention installs a bypass device at the control switch of each electric energy meter, does not need to change the wiring of the electric energy meter box side, only needs to install a signal generating device at each household user side one by one, can complete the association matching of the electric energy meter and the user, and has high error correction efficiency and small workload.
Drawings
FIG. 1 is a general block diagram of the system of the present invention.
Fig. 2 is a flow chart of a specific implementation of the system of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the error correction system for electric energy meters comprises n bypass devices and a signal generating device, wherein the bypass devices are connected in parallel with control switches K of the electric energy meters i (i ═ 1,2, …, n) in the low-voltage electric meter boxiBoth sides for bypass control switch KiAnd a knife switch D for receiving the power carrier signal and installing a signal generating device on a resident user j (j is 1,2, …, n)jFor emitting a specific power carrier signal.
The structure of each apparatus will be described in detail below.
The bypass device comprises an isolation transformer, a Central Processing Unit (CPU), a power line carrier communication (PLC) module, a human-machine interface (HMI), a relay, a power supply module and an access switch ZkComposition, switch Z of bypass deviceKCan pass through the human-computer interaction interfaceWhen the switch is manually switched off, the received power carrier signal can be displayed by the HMIiBypass and switch ZKWhen closed, the isolation transformer loop of the device 1 is connected in series with the consumer supply loop, and if there is a power carrier signal from the consumer side, the signal cannot be transmitted to the primary side (1, 2 side) due to the blocking effect of the transformer, and can be observed only on the secondary side (1, 2 side).
The signal generating device comprises a second central processing unit, a second power carrier communication module, a second human-computer interaction interface and a second power supply module. The wiring scheme shown in figure 1 typically requires closing the user's home switch D before signalingjSo that signals can be transmitted from the subscriber side to the meter box via the distribution line, or a signal generating device is installed in the disconnecting link DjThereby eliminating the need to close the disconnecting link DjThe signal output can be finished; the specific power carrier signal transmitted in fig. 2 includes the user number information, and the device 1 may analyze the received power carrier signal.
At KiAfter n bypass devices are installed on two sides, n electric energy meter channels are supplied with power through the isolation transformer branches, at the moment, on the user side, only one signal generating device is installed at each time, when the signal generating device is operated to send signals, only the electric energy meter branch which uniquely corresponds to the signal generating device can receive power carrier signals due to the blocking effect of the transformer, and the matching relation between the electric energy meter and the user can be obtained through analysis of the bypass devices.
The specific implementation flow of the error correction method for the electric energy meter is shown in fig. 2, and the method comprises the following steps:
step 1, controlling a switch K on each electric energy meteri(i is 1,2, …, n) two sides are respectively connected with a bypass device in parallel, and all control switches K are disconnectediClosing the access switches Z of all bypass deviceskConnecting the bypass device in series into a user power supply loop;
step 2, at a certain user j (j is 1,2, …, n), the knife switch DjWith signal generating means mounted on the primary side, or on the disconnecting link DjA signal generating device is arranged on the secondary side of the knife switch and closes the corresponding knife switch Dj；
Step 3, enabling the signal generating device to transmit power carrier signals and monitoring each control switch KiThe information receiving condition of the bypass devices at the two sides obtains the matching relation between the user and the electric energy meter;
and 4, successively installing the signal generating devices on other subscriber lines, and transmitting, receiving and matching signals until the installation and error correction of all the subscriber electric energy meters are completed.
Example 2
Embodiment 2 the modules of the bypass device and the signal generating device are defined on the basis of embodiment 1. The isolation transformer adopts a transformation ratio of 1: 1, a double-winding transformer; the central processing unit adopts an STM32F103RBT6 type microcontroller; the power carrier communication module adopts a KQ-130485F 485-to-power line carrier module and is connected with the CPU in a 485 bus mode; the man-machine interaction interface adopts a Willon TK6051iP type touch screen; the relay adopts a JQX-62F2Z DC12V type high-power relay; the power module supplies power for a 12V battery, and working voltages of 5V, 3.3V and the like are obtained through the DC-DC module.
Claims (9)
1. The electric energy meter error correction method is characterized in that an electric energy meter error correction system comprises a plurality of bypass devices and a signal generation device, wherein the number of the bypass devices is equal to that of the electric energy meters, and the bypass devices are connected in parallel to two sides of a control switch of the electric energy meters and used for bypassing the control switch and receiving power carrier signals; the signal generating device is arranged at a knife switch of a resident user and used for sending out a power carrier signal;
the error correction method of the electric energy meter comprises the following steps:
step 1, respectively connecting a bypass device in parallel on two sides of each electric energy meter control switch, disconnecting all the control switches, closing access switches of all the bypass devices, and connecting the bypass devices in a user power supply loop in series;
step 2, installing a signal generating device on the primary side of a certain user disconnecting link, or installing a signal generating device on the secondary side of the disconnecting link, and closing the corresponding disconnecting link;
step 3, enabling the signal generating device to transmit power carrier signals, monitoring the receiving conditions of the bypass devices on the two sides of each control switch, and obtaining the matching relation between the user and the electric energy meter;
and 4, repeating the steps 2-3 until the installation and error correction of all the user electric energy meters are completed.
2. The error correction method for the electric energy meter according to claim 1, wherein the bypass device comprises an isolation transformer, a central processing unit, a power carrier communication module, a man-machine interface, a relay and power supply module and an access switch.
3. The electric energy meter error correction method according to claim 1, wherein the signal generation device comprises a central processing unit, a power carrier communication module, a human-computer interaction interface and a power supply module.
4. The electric energy meter error correction method according to claim 2, wherein the isolation transformer adopts a transformer ratio of 1: 1 double winding transformer.
5. The error correction method for the electric energy meter according to claim 2, characterized in that the relay adopts a JQX-62F2ZDC12V type high-power relay.
6. The electric energy meter error correction method according to claim 2 or 3, characterized in that the central processing unit adopts a microcontroller of STM32F103RBT6 type.
7. The electric energy meter error correction method according to claim 2 or 3, characterized in that the electric power carrier communication module adopts a KQ-130485F 485 power line carrier module, and is connected with the CPU in a 485 bus manner.
8. The error correction method for the electric energy meter according to claim 2 or 3, characterized in that the man-machine interaction interface adopts a Willon TK6051iP type touch screen.
9. The error correction method for the electric energy meter according to claim 1, wherein the power carrier signal transmitted by the signal generating device in step 3 includes user number information.
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| CN201810025894.8A CN108226848B (en) | 2018-01-11 | 2018-01-11 | Electric energy meter error correction system and method |
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| CN201810025894.8A CN108226848B (en) | 2018-01-11 | 2018-01-11 | Electric energy meter error correction system and method |
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| CN108226848B true CN108226848B (en) | 2020-06-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110261715B (en) * | 2019-06-24 | 2021-06-29 | 广州华铭电力科技有限公司 | Ammeter alignment method, device and system and storage medium |
| CN110224403B (en) * | 2019-06-24 | 2023-08-01 | 广州华铭电力科技有限公司 | Dual-power household meter alignment method, device and system |
| CN110308363B (en) * | 2019-06-24 | 2021-12-07 | 广州华铭电力科技有限公司 | Strong-current-state household meter alignment method, device and system |
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2018
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| JP2000258484A (en) * | 1999-03-10 | 2000-09-22 | Hioki Ee Corp | Connection state detector in power meter |
| CN200989922Y (en) * | 2006-08-09 | 2007-12-12 | 太原市特普高电子科技有限公司 | Electronic energy meter with power-driven device identification function |
| CN101707018A (en) * | 2009-10-28 | 2010-05-12 | 烟台五洲电力科技有限公司 | Electric energy metering verification simulating system |
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