CN112018874A - Dual-power supply monitoring device and system - Google Patents
Dual-power supply monitoring device and system Download PDFInfo
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- CN112018874A CN112018874A CN202010861353.6A CN202010861353A CN112018874A CN 112018874 A CN112018874 A CN 112018874A CN 202010861353 A CN202010861353 A CN 202010861353A CN 112018874 A CN112018874 A CN 112018874A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 46
- 239000003990 capacitor Substances 0.000 claims abstract description 29
- 230000009977 dual effect Effects 0.000 claims description 17
- 238000004128 high performance liquid chromatography Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/56—Special tariff meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a dual-power supply monitoring device and a dual-power supply monitoring system, which comprise a measuring unit, a communication unit and a power supply unit, wherein the measuring unit is used for monitoring load shedding information; the communication unit is connected with the measuring unit and sends the monitored load shedding information to the monitoring terminal; the power supply unit comprises an AC/DC module, a first super capacitor, a power supply monitoring circuit, a first DC/DC module and a second DC/DC module; the AC/DC module is used for being connected with commercial power; the output end of the AC/DC module is connected with the input ends of the first DC/DC module and the second DC/DC module, the output end of the AC/DC module is also connected with the first super capacitor and the power supply monitoring circuit, and the output end of the power supply monitoring circuit is respectively connected with the input ends of the first DC/DC module and the second DC/DC module; the output end of the first DC/DC module is connected with the power supply end of the measuring unit; the output of the second DC/DC module is connected to the power supply terminal of the communication unit. After the load is switched, the load switching information is informed to the marketing and replacement of the charging ammeter in time, so that the method is beneficial to stable operation of the power grid and improvement of the charging accuracy.
Description
Technical Field
The invention belongs to the technical field of power supply monitoring, and particularly relates to a dual-power supply monitoring device and system.
Background
With the continuous progress of science and technology, the requirements of various industries on the power supply reliability are higher and higher. In many occasions, such as hospitals, coal mines, etc., two power supplies must be used to ensure the reliability of power supply. At present, a phenomenon that a double-power-supply line adopts double-ammeter charging exists in a part of power distribution rooms, but only one ammeter can be added in the same power distribution room in a marketing charging system, so that the problem that the charging ammeter of the marketing system is not updated after load shedding exists, and the situation that actual electricity consumption is inconsistent with the paid electricity fee occurs.
Disclosure of Invention
In order to solve the problems, the invention provides a dual-power supply monitoring device and a dual-power supply monitoring system, after the load is switched, the load switching information is informed to marketing and change the charging ammeter in time, so that the device and the system are beneficial to stable operation of a power grid and improvement of charging accuracy.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a dual power supply monitoring device, including:
the measuring unit is used for being connected with a dual-power supply line and monitoring load shedding information;
the communication unit is connected with the measuring unit and used for sending the monitored load shedding information to the monitoring terminal;
the power supply unit comprises an AC/DC module, a first super capacitor, a power supply monitoring circuit, a first DC/DC module and a second DC/DC module; the AC/DC module is used for being connected with commercial power and converting an external 220V alternating current power supply into a 5V direct current power supply; the output end of the AC/DC module is respectively connected with the input ends of the first DC/DC module and the second DC/DC module, the output end of the AC/DC module is also sequentially connected with the first super capacitor and the power supply monitoring circuit, and the output end of the power supply monitoring circuit is respectively connected with the input ends of the first DC/DC module and the second DC/DC module; the output end of the first DC/DC module is connected with the power supply end of the measuring unit; the output terminal of the second DC/DC module is connected to the power supply terminal of the communication unit.
Optionally, when the external 220V ac power supply is lost and the power supply monitoring circuit monitors that the voltage of the first super capacitor is greater than 3.7V, the first super capacitor provides power for continuing operation.
Optionally, the power supply unit further includes a DC/DC boost circuit, an input end and an output end of the DC/DC boost circuit are respectively connected to the power supply monitoring circuit and the first DC/DC module, and when an external 220V alternating-current power supply is lost and the power supply monitoring circuit monitors that the voltage of the first super capacitor is less than 3.7V, the DC/DC boost circuit boosts the voltage output by the first super capacitor to 5V and sends the voltage to the first DC/DC module and the second DC/DC module.
Optionally, the output voltage of the first DC/DC module is 3.3V, and the output voltage of the second DC/DC module is 4.2V.
Optionally, the measurement unit includes a voltage transformer, a current transformer, an analog signal acquisition circuit, and a processor; the input ends of the voltage transformer and the current transformer are respectively used for being connected with a dual-power supply line, the output ends of the voltage transformer and the current transformer are both connected with the analog signal acquisition circuit, and the output end of the analog signal acquisition circuit is connected with the input end of the processor.
Optionally, the communication unit comprises an HPLC communication unit, a second super capacitor, a 4G communication module and a base station; one end of the HPLC communication unit is connected with the measuring unit, and the other end of the HPLC communication unit is connected with the monitoring terminal through a power line; two ends of the second super capacitor are respectively connected with the second DC/DC module and the 4G communication module; and the 4G communication module is connected with the monitoring terminal through the base station.
Optionally, the 4G communication module is connected to the measurement unit by using a UART, and is configured to interact with the measurement unit to communicate a message.
In a second aspect, the present invention provides a monitoring system based on a dual power supply monitoring device, including:
the first electric meter is connected with a main power supply line, and the dual-power supply monitoring device in any one of the first aspect is connected in parallel to the first electric meter;
the second electric meter is connected with a standby power supply line, and the dual-power supply monitoring device in any one of the first aspect is connected in parallel to the second electric meter;
the input end of the double-power-supply change-over switch is respectively connected with the first electric meter and the second electric meter;
and the input end of the transformer is connected with the dual-power transfer switch, and the output end of the transformer is used for being connected with a user.
Optionally, the dual power transfer switch is a 10kV dual power transfer switch.
Optionally, the transformer is a 10kV/0.4kV transformer.
Compared with the prior art, the invention has the beneficial effects that:
the dual-power supply monitoring device can monitor the real-time state of two 10kV power supply lines at the same time, and reports the state to the monitoring terminal through the communication unit, after an external power supply is lost, the dual-power supply monitoring device can continue to work for more than 3 minutes as a backup power supply through the super capacitor, so that the monitoring information is guaranteed to be reported reliably, the running state of the power supply lines is monitored reliably in real time, the load shedding information is informed to market and replace a charging ammeter in time, the dual-power supply monitoring device is beneficial to stable running of a power grid, and the charging accuracy is also improved.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a measurement module in one embodiment of the invention;
FIG. 2 is a schematic diagram of a power module in an embodiment of the invention;
FIG. 3 is a schematic diagram of a communication module in an embodiment of the invention;
fig. 4 is a schematic diagram of an application environment of the dual power supply monitoring apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
The embodiment of the invention provides a dual-power supply monitoring device, which specifically comprises the following components as shown in figures 1-3:
the measuring unit is used for being connected with a dual-power supply line and monitoring load shedding information;
the communication unit is connected with the measuring unit and used for sending the monitored load shedding information to the monitoring terminal;
the power supply unit comprises an AC/DC module, a first super capacitor, a power supply monitoring circuit, a first DC/DC module and a second DC/DC module; the AC/DC module is used for being connected with commercial power and converting an external 220V alternating current power supply into a 5V direct current power supply; the output end of the AC/DC module is respectively connected with the input ends of the first DC/DC module and the second DC/DC module, the output end of the AC/DC module is also sequentially connected with the first super capacitor and the power supply monitoring circuit, the output end of the power supply monitoring circuit is respectively connected with the input ends of the first DC/DC module and the second DC/DC module, and when an external 220V alternating current power supply is lost and the voltage of the first super capacitor monitored by the power supply monitoring circuit is greater than 3.7V, the first super capacitor provides a power supply for continuous operation; the output end of the first DC/DC module is connected with the power supply end of the measuring unit; the output terminal of the second DC/DC module is connected to the power supply terminal of the communication unit.
Therefore, the first super capacitor with large capacity is used as the backup power source in the embodiment of the invention, the normal operation of 3 minutes after power failure can be realized, and the reliable uploading of power failure information can be ensured.
In a specific implementation manner of the embodiment of the present invention, the output voltage of the first DC/DC module is 3.3V, and the output voltage of the second DC/DC module is 4.2V.
As shown in fig. 1, the measuring unit includes a voltage transformer, a current transformer, an analog signal acquisition circuit and a processor; the input ends of the voltage transformer and the current transformer are respectively used for being connected with a dual-power supply line to obtain voltage and current signals within the range of the device, so that PT and CT output values of a 10kV side are collected, and the running state of the line is monitored in real time. The output ends of the voltage transformer and the current transformer are connected with the analog signal acquisition circuit, and the output end of the analog signal acquisition circuit is connected with the input end of the processor. The analog signal acquisition circuit can adopt an ADC conversion chip.
As shown in fig. 3, the communication unit includes an HPLC communication unit, a second super capacitor, a 4G communication module, and a base station; one end of the HPLC communication unit is connected with the measuring unit, and the other end of the HPLC communication unit is connected with the monitoring terminal through a power line; two ends of the second super capacitor are respectively connected with the second DC/DC module and the 4G communication module; the 4G communication module is connected with the monitoring terminal through the base station; the 4G communication module is connected with the measuring unit by adopting a UART and is used for interacting communication messages with the measuring unit. The second super capacitor is used for providing peak power for the 4G communication module, and the situation that the normal work of the 4G communication module is influenced due to the fact that a preceding stage DC/DC cannot provide instant large current under the condition of peak power consumption of the 4G communication module is prevented.
In the actual use process, the line is electrified and adopts HPLC communication, the signal blind area problem of the traditional wireless communication is solved by using an HPLC communication module, and the widely-existing commercial power is used as a communication carrier; meanwhile, when the line is powered off, GPRS communication is adopted, and fault information can be uploaded through the reserved 4G communication module.
Example 2
Based on example 1, the inventive example differs from example 1 in that:
the power supply unit further comprises a DC/DC booster circuit, two ends of the DC/DC booster circuit are respectively connected with the power supply monitoring circuit and the first DC/DC module, when an external 220V alternating current power supply is lost and the power supply monitoring circuit monitors that the voltage of the first super capacitor is smaller than 3.7V, the DC/DC booster circuit boosts the voltage output by the first super capacitor to 5V and sends the voltage to the first DC/DC module and the second DC/DC module.
Example 3
The embodiment of the invention provides a monitoring system based on a dual-power supply monitoring device, as shown in fig. 4, comprising:
the system comprises a first electric meter, a second electric meter and a monitoring device, wherein the first electric meter is connected with a main power supply line, and the dual-power-supply power supply monitoring device in any one of embodiment 1 or embodiment 2 is connected to the first electric meter in parallel;
the second electric meter is connected with a standby power supply line, and the dual-power-supply power supply monitoring device in any one of embodiment 1 or embodiment 2 is connected to the second electric meter in parallel;
the input end of the double-power-supply change-over switch is respectively connected with the first electric meter and the second electric meter;
and the input end of the transformer is connected with the transformer, and the output end of the transformer is used for being connected with a user.
In a specific implementation manner of the embodiment of the present invention, the dual power source switch is a 10kV dual power source switch. The transformer is a 10kV/0.4kV transformer.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A dual power supply monitoring device, comprising:
the measuring unit is used for being connected with a dual-power supply line and monitoring load shedding information;
the communication unit is connected with the measuring unit and used for sending the monitored load shedding information to the monitoring terminal;
the power supply unit comprises an AC/DC module, a first super capacitor, a power supply monitoring circuit, a first DC/DC module and a second DC/DC module; the AC/DC module is used for being connected with commercial power and converting an external 220V alternating current power supply into a 5V direct current power supply; the output end of the AC/DC module is respectively connected with the input ends of the first DC/DC module and the second DC/DC module, the output end of the AC/DC module is also sequentially connected with the first super capacitor and the power supply monitoring circuit, and the output end of the power supply monitoring circuit is respectively connected with the input ends of the first DC/DC module and the second DC/DC module; the output end of the first DC/DC module is connected with the power supply end of the measuring unit; the output terminal of the second DC/DC module is connected to the power supply terminal of the communication unit.
2. The dual power supply monitoring device of claim 1, wherein: when the external 220V alternating current power supply is lost and the power supply monitoring circuit monitors that the voltage of the first super capacitor is greater than 3.7V, the first super capacitor provides power supply for continuous operation.
3. The dual power supply monitoring device of claim 1, wherein: the power supply unit further comprises a DC/DC booster circuit, wherein the input end and the output end of the DC/DC booster circuit are respectively connected with the power supply monitoring circuit and the first DC/DC module, when an external 220V alternating current power supply is lost and the power supply monitoring circuit monitors that the voltage of the first super capacitor is smaller than 3.7V, the DC/DC booster circuit boosts the voltage output by the first super capacitor to 5V and sends the voltage to the first DC/DC module and the second DC/DC module.
4. The dual power supply monitoring device of claim 1, wherein: the output voltage of the first DC/DC module is 3.3V, and the output voltage of the second DC/DC module is 4.2V.
5. The dual power supply monitoring device of claim 1, wherein: the measuring unit comprises a voltage transformer, a current transformer, an analog signal acquisition circuit and a processor; the input ends of the voltage transformer and the current transformer are respectively used for being connected with a dual-power supply line, the output ends of the voltage transformer and the current transformer are both connected with the analog signal acquisition circuit, and the output end of the analog signal acquisition circuit is connected with the input end of the processor.
6. The dual power supply monitoring device of claim 1, wherein: the communication unit comprises an HPLC communication unit, a second super capacitor, a 4G communication module and a base station; one end of the HPLC communication unit is connected with the measuring unit, and the other end of the HPLC communication unit is connected with the monitoring terminal through a power line; two ends of the second super capacitor are respectively connected with the second DC/DC module and the 4G communication module; and the 4G communication module is connected with the monitoring terminal through the base station.
7. The dual power supply monitoring device of claim 7, wherein: the 4G communication module is connected with the measuring unit by adopting a UART and is used for interacting communication messages with the measuring unit.
8. The utility model provides a monitoring system based on dual power supply monitoring devices which characterized in that includes:
a first electric meter connected with a main power supply line, wherein the first electric meter is connected with the dual-power supply monitoring device of any one of claims 1-7 in parallel;
a second electric meter connected with a standby power supply line, wherein the second electric meter is connected with the dual-power supply monitoring device of any one of claims 1-7 in parallel;
the input end of the double-power-supply change-over switch is respectively connected with the first electric meter and the second electric meter;
and the input end of the transformer is connected with the dual-power transfer switch, and the output end of the transformer is used for being connected with a user.
9. The monitoring system based on the dual power supply monitoring device of claim 8, wherein: the dual-power transfer switch is a 10kV dual-power transfer switch.
10. The monitoring system based on the dual power supply monitoring device of claim 8, wherein: the transformer is a 10kV/0.4kV transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010861353.6A CN112018874A (en) | 2020-08-25 | 2020-08-25 | Dual-power supply monitoring device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010861353.6A CN112018874A (en) | 2020-08-25 | 2020-08-25 | Dual-power supply monitoring device and system |
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| CN112018874A true CN112018874A (en) | 2020-12-01 |
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| CN202010861353.6A Pending CN112018874A (en) | 2020-08-25 | 2020-08-25 | Dual-power supply monitoring device and system |
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| CN203617209U (en) * | 2013-11-28 | 2014-05-28 | 国网河南省电力公司鹤壁供电公司 | Double-power-supply switching device |
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| CN110672959A (en) * | 2019-09-29 | 2020-01-10 | 北京科东电力控制系统有限责任公司 | Single-phase multichannel low pressure user side power failure monitoring devices |
| US20200161862A1 (en) * | 2018-11-19 | 2020-05-21 | Briggs & Stratton Corporation | Standby battery-meter socket adapter with battery pack |
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2020
- 2020-08-25 CN CN202010861353.6A patent/CN112018874A/en active Pending
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| US20200161862A1 (en) * | 2018-11-19 | 2020-05-21 | Briggs & Stratton Corporation | Standby battery-meter socket adapter with battery pack |
| CN208955742U (en) * | 2018-11-29 | 2019-06-07 | 国网安徽省电力有限公司滁州供电公司 | Meet the preposition access device of the special transformer terminals of phase three-wire three of dual power supply |
| CN110672959A (en) * | 2019-09-29 | 2020-01-10 | 北京科东电力控制系统有限责任公司 | Single-phase multichannel low pressure user side power failure monitoring devices |
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