CN109946494B - Metering loop fault electric quantity additional monitor - Google Patents
Metering loop fault electric quantity additional monitor Download PDFInfo
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- CN109946494B CN109946494B CN201910300708.1A CN201910300708A CN109946494B CN 109946494 B CN109946494 B CN 109946494B CN 201910300708 A CN201910300708 A CN 201910300708A CN 109946494 B CN109946494 B CN 109946494B
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Abstract
The invention discloses a metering loop fault electric quantity compensation monitor which comprises an external current unit, a CT data acquisition unit, a DSP digital signal processor unit, a communication unit, an auxiliary power supply unit, an alarm output unit, a PT data acquisition unit, an external voltage unit and a standby PT data acquisition unit, wherein the output end of the external current unit is electrically connected with the input end of the CT data acquisition unit, the output end of the external voltage unit is electrically connected with the input ends of the PT data acquisition unit and the standby PT data acquisition unit respectively, and the output ends of the CT data acquisition unit, the PT data acquisition unit and the standby PT data acquisition unit are electrically connected with the input end of the DSP digital signal processor unit respectively. The invention is provided with the communication unit, adopts the independent network port and the RS485 port to output, can be connected with the electric quantity acquisition terminal, realizes the functions of remote charging and monitoring, and has the advantages of simple structure, accurate and credible additional electric quantity.
Description
Technical Field
The invention relates to a metering loop fault electric quantity additional monitor, in particular to automatic additional monitor equipment for metering faults of gateway meters of power generation enterprises and power transformation enterprises, and belongs to the technical field of electric energy monitoring.
Background
With the rapid development of economy, the metering accuracy of substations in various areas is also higher and higher, but the detection performance of metering devices is not very perfect. At present, the existing loop state inspection instrument on the market can monitor states of normal connection, disconnection, short circuit, primary short circuit and the like of a secondary loop of a power generation enterprise and a transformer enterprise gateway meter in real time, so that accurate real-time monitoring of the secondary loop state is realized, direct and reliable data support can be provided for electricity inspection, fault diagnosis and the like, but when a current transformer or a voltage transformer used for metering is disconnected due to occurrence of some special conditions, the system cannot accurately supplement electric quantity, and therefore economic benefits of an electric power department are greatly damaged.
Disclosure of Invention
Based on the defects, the application provides a metering loop fault electric quantity compensation monitor, and overcomes the defect that a JSY type voltage loss timer only can estimate electric quantity according to time after a PT fuse is fused and loses voltage. When the PT has the faults, the application adopts another PT sampling voltage to accurately supplement the electric quantity, and when a certain phase CT breaks, the application adopts a sampling value of the unbroken CT and calculates the self-generated current to meet the requirement of metering precision, thereby properly solving some of the problems, and the application has the advantages of simple design structure, high sensitivity and accurate and reliable electric quantity supplement.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
According to the technical scheme that this patent provided: the utility model provides a metering loop trouble electric quantity is followed and is mended monitor, it mainly comprises external current unit, CT data acquisition unit, DSP digital signal processor unit, communication unit, auxiliary power unit, alarm output unit, PT data acquisition unit, external voltage unit and reserve PT data acquisition unit, the output of external current unit and the input electric connection of CT data acquisition unit, the output of external voltage unit respectively with PT data acquisition unit and reserve PT data acquisition unit's input electric connection, CT data acquisition unit, PT data acquisition unit and reserve PT data acquisition unit's output respectively with the input electric connection of DSP digital signal processor unit, the output of DSP digital signal processor unit is connected with communication unit and alarm output unit, two-way electric connection between DSP digital signal processor unit and the communication unit, auxiliary power unit respectively with CT data acquisition unit, DSP digital signal processor unit, communication unit, alarm output unit, PT data acquisition unit and reserve PT data acquisition unit between electric connection.
As a further improvement of the invention, the auxiliary power supply unit is an auxiliary working power supply of the electric quantity additional monitor, and the auxiliary power supply unit adopts 220V direct current voltage.
As a further improvement of the invention, a color-changing lamplight warning module and an intelligent voice prompt module are arranged in the alarm output unit.
Compared with the prior art, the invention has the following advantages:
1) The invention is provided with the CT data acquisition unit, the PT data acquisition unit and the standby PT data acquisition unit, when any unit in the CT data acquisition unit, the PT data acquisition unit and the standby PT data acquisition unit monitors that the current or the voltage of any two phases in the three phases of the circuit deviate from the preset value set in the expected mode, the DSP digital signal processor unit receives the abnormal signal and outputs the abnormal signal to the alarm output unit after processing, so that the alarm output unit outputs corresponding alarm information, an electric quantity compensation monitor is automatically started, the charging compensation is carried out by utilizing the current auxiliary unit of the device, the electric quantity compensation is accurate and reliable, and the electric parameters such as time, electric quantity and electric energy for starting the compensation are automatically recorded.
2) The invention adopts the independent network port and the RS485 port to output and can be connected with the electric quantity acquisition terminal by being provided with the communication unit, thereby realizing the functions of remote charging and monitoring.
3) The invention is different from the JSY voltage-loss current-interruption timer and the secondary circuit monitor existing in the current market, the device overcomes the defect that the system can only estimate the electric quantity according to time after the PT fuse is fused and the voltage is lost, adopts the voltage sampled by another PT to accurately supplement the electric quantity, and when a certain phase CT is broken, the system adopts a CT sampling value without broken line and calculates the self-generated current, thereby meeting the requirement of metering precision.
Drawings
Fig. 1 is a block diagram of a metering loop fault electric quantity additional monitor according to the present invention.
Fig. 2 is a schematic diagram illustrating connection between an auxiliary current unit and other peripheral units according to the present invention.
In the figure: 1. an external current unit; 2. a CT data acquisition unit; 3. a DSP digital signal processor unit; 4. a communication unit; 5. an auxiliary power supply unit; 6. an alarm output unit; 7. PT data acquisition unit; 8. an external voltage unit; 9. and a standby PT data acquisition unit.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1-2, the metering loop fault electric quantity additional monitor mainly comprises an external current unit 1, a CT data acquisition unit 2, a DSP digital signal processor unit 3, a communication unit 4, an auxiliary power supply unit 5, an alarm output unit 6, a PT data acquisition unit 7, an external voltage unit 8 and a standby PT data acquisition unit 9, wherein the output end of the external current unit 1 is electrically connected with the input end of the CT data acquisition unit 2, the output end of the external voltage unit 8 is electrically connected with the input ends of the PT data acquisition unit 7 and the standby PT data acquisition unit 9, the output ends of the CT data acquisition unit 2, the PT data acquisition unit 7 and the standby PT data acquisition unit 9 are electrically connected with the input end of the DSP digital signal processor unit 3, the output end of the DSP digital signal processor unit 3 is connected with the communication unit 4 and the alarm output unit 6, the DSP digital signal processor unit 3 is electrically connected with the communication unit 4 in a bidirectional manner, and the auxiliary power supply unit 5 is electrically connected with the CT data acquisition unit 2, the DSP digital signal processor unit 3, the communication unit 4, the output unit 6 and the standby PT data acquisition unit 7.
As shown in fig. 1 and 2, the auxiliary power supply unit 5 is an auxiliary working power supply of the electric quantity compensation monitor, the auxiliary power supply unit 5 adopts 220V dc voltage, and when the system is disconnected, the auxiliary power supply unit 5 can complete the charging compensation and record the time, electric quantity, electric energy and other electric parameters for starting the compensation.
As shown in fig. 1 and 2, the alarm output unit 6 is provided with a color-changing light warning module and an intelligent voice prompt module, and when the system monitors that abnormal signals exist in the circuit, the color-changing light warning module and the intelligent voice prompt module can provide color and acoustic signal warning for people.
It should be noted that, after the fault electric quantity additional monitor is correctly installed in a circuit, when any unit of the CT data acquisition unit 2, the PT data acquisition unit 7 and the standby PT data acquisition unit 9 in the electric quantity additional monitor monitors that the current or voltage of any one phase or two phases in three phases of the circuit deviates from the preset value set in advance, the DSP digital signal processor unit 3 receives the abnormal signal and outputs the abnormal signal to the alarm output unit 6 after processing, so that the alarm output unit 6 outputs corresponding alarm information, automatically starts the electric quantity additional monitor, performs charging and additional charging by using the auxiliary power unit 5 of the device itself, records the time, the electric quantity, the electric energy and other electric parameters of the starting and the three-phase four-wire electric energy meter, and once the voltage in the three-phase circuit is simultaneously lost, the three-phase four-wire electric energy meter uses six-wire system wiring, acquires the voltage values in different lines or buses and simultaneously starts the electric quantity additional monitor to perform tracking and monitoring.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides a monitor is mended to measurement return circuit trouble electric quantity, includes external current unit (1), CT data acquisition unit (2), DSP digital signal processor unit (3), communication unit (4), auxiliary power unit (5), alarm output unit (6), PT data acquisition unit (7), external voltage unit (8) and reserve PT data acquisition unit (9) constitution, its characterized in that: the output end of the external current unit (1) is electrically connected with the input end of the CT data acquisition unit (2), the output end of the external voltage unit (8) is electrically connected with the input ends of the PT data acquisition unit (7) and the standby PT data acquisition unit (9) respectively, the output ends of the CT data acquisition unit (2), the PT data acquisition unit (7) and the standby PT data acquisition unit (9) are electrically connected with the input end of the DSP digital signal processor unit (3) respectively, the output end of the DSP digital signal processor unit (3) is connected with the communication unit (4) and the alarm output unit (6), the DSP digital signal processor unit (3) is electrically connected with the communication unit (4) in a bidirectional manner, and the auxiliary power supply unit (5) is electrically connected with the CT data acquisition unit (2), the DSP digital signal processor unit (3), the communication unit (4), the alarm output unit (6), the PT data acquisition unit (7) and the standby PT data acquisition unit (9) respectively;
After the fault electric quantity additional monitor is correctly installed in a circuit, when any unit of a CT data acquisition unit (2), a PT data acquisition unit (7) and a standby PT data acquisition unit (9) in the electric quantity additional monitor monitors that the current or voltage of any one phase or two phases in three phases of the circuit deviates from a preset value set in an expected mode, a DSP digital signal processor unit (3) receives an abnormal signal and outputs the abnormal signal to an alarm output unit (6) through processing, so that the alarm output unit (6) outputs corresponding alarm information, the electric quantity additional monitor is automatically started, charging and additional is performed by using an auxiliary power supply unit (5) of the device, the time, the electric quantity and the electric energy parameters for starting and additional are recorded, a current metering unit of the three-phase four-wire electric energy meter adopts six-wire system wiring, and once the voltage in the three-phase circuit is simultaneously lost, the voltage value in the circuit or bus different from the measurement is acquired and the electric quantity additional monitor is simultaneously started for tracking and monitoring;
The auxiliary power supply unit (5) is an auxiliary working power supply of the electric quantity additional monitor, and the auxiliary power supply unit (5) adopts 220V direct current voltage;
And a color-changing lamplight warning module and an intelligent voice prompt module are arranged in the alarm output unit (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910300708.1A CN109946494B (en) | 2019-04-15 | 2019-04-15 | Metering loop fault electric quantity additional monitor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910300708.1A CN109946494B (en) | 2019-04-15 | 2019-04-15 | Metering loop fault electric quantity additional monitor |
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| CN109946494A CN109946494A (en) | 2019-06-28 |
| CN109946494B true CN109946494B (en) | 2024-08-13 |
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| CN114264852A (en) * | 2021-11-16 | 2022-04-01 | 国网河北省电力有限公司营销服务中心 | Full-automatic voltage measuring device, error electric quantity metering system and method |
Citations (3)
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|---|---|---|---|---|
| CN203071579U (en) * | 2012-12-28 | 2013-07-17 | 安徽天沃电气技术有限公司 | SVG (Static Var Generator) control system specially used for low-voltage double-bus double-segment wiring |
| CN107462864A (en) * | 2017-09-20 | 2017-12-12 | 国网湖南省电力公司 | Electric energy metering secondary overall operation situation on-Line Monitor Device and application process |
| CN209927921U (en) * | 2019-04-15 | 2020-01-10 | 福建省水利水电勘测设计研究院 | Monitor for compensating fault electric quantity of metering loop |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200344922Y1 (en) * | 2003-12-30 | 2004-03-19 | 한양전공주식회사 | Composite protective relay device |
| CN201364488Y (en) * | 2008-12-31 | 2009-12-16 | 广东省电力设计研究院 | Electric switching control module for nuclear power station electric power plant |
| CN203479937U (en) * | 2013-09-27 | 2014-03-12 | 云南电网公司曲靖供电局 | Electricity utilization checking management system |
| CN103852744A (en) * | 2014-03-03 | 2014-06-11 | 南方电网科学研究院有限责任公司 | Distributed online monitoring system and method for electric energy metering device |
| CN105675942A (en) * | 2016-03-28 | 2016-06-15 | 国网山东省电力公司济宁供电公司 | High-voltage electric energy metering cabinet and method based on real-time monitoring |
| CN206096216U (en) * | 2016-07-29 | 2017-04-12 | 国家电网公司 | Prevent outside permanent magnetic field interference electric energy meter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203071579U (en) * | 2012-12-28 | 2013-07-17 | 安徽天沃电气技术有限公司 | SVG (Static Var Generator) control system specially used for low-voltage double-bus double-segment wiring |
| CN107462864A (en) * | 2017-09-20 | 2017-12-12 | 国网湖南省电力公司 | Electric energy metering secondary overall operation situation on-Line Monitor Device and application process |
| CN209927921U (en) * | 2019-04-15 | 2020-01-10 | 福建省水利水电勘测设计研究院 | Monitor for compensating fault electric quantity of metering loop |
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