CN117110706A - Direct-current electric energy metering device and method - Google Patents
Direct-current electric energy metering device and method Download PDFInfo
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- CN117110706A CN117110706A CN202311384886.XA CN202311384886A CN117110706A CN 117110706 A CN117110706 A CN 117110706A CN 202311384886 A CN202311384886 A CN 202311384886A CN 117110706 A CN117110706 A CN 117110706A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 126
- 230000005540 biological transmission Effects 0.000 claims description 37
- 239000003990 capacitor Substances 0.000 claims description 33
- 230000001052 transient effect Effects 0.000 claims description 17
- 230000001629 suppression Effects 0.000 claims description 16
- 230000008014 freezing Effects 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000015556 catabolic process Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- General Physics & Mathematics (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The application discloses a direct-current electric energy metering device and a direct-current electric energy metering method, and relates to the technical field of electric energy metering. The direct-current electric energy metering device comprises a metering circuit, a voltage and current sampling circuit, a control chip and a relay; the voltage and current sampling circuit is used for collecting the output voltage value and the output current value from the standby power equipment to the load, and the metering circuit is used for metering the electric energy of the collected output voltage value and output current value, so that the accurate metering of the output electric energy of the standby power equipment to the load is realized. The relay is further controlled to be conducted through the control chip, so that the control of the standby power equipment on the output of the load power is realized, and the safety of the equipment is ensured.
Description
Technical Field
The application relates to the technical field of electric energy metering, in particular to a direct current electric energy metering device and method.
Background
Currently, the equipment of the base station operator is powered by direct current. The power supplier provides direct current power through the standby power equipment, and charges the base station operator according to the actual power consumption. Wherein the standby device may provide multiple outputs.
However, although the differentiated standby power equipment applied to the dc power supply of the base station operator can provide multiple outputs, the standby power equipment can only measure the total power of the multiple outputs, but cannot obtain the power consumption of each output, that is, cannot obtain the actual power consumption of each connected operator equipment. If each operator is provided with a piece of standby power equipment, equipment resource waste can be caused.
In view of the above-mentioned problems, how to solve the problem that the existing standby power equipment cannot measure the electric energy of multiple outputs respectively is a urgent problem for those skilled in the art.
Disclosure of Invention
The application aims to provide a direct-current electric energy metering device and a direct-current electric energy metering method, which are used for solving the problem that the existing standby electric equipment cannot meter multiple paths of output electric energy respectively.
In order to solve the above technical problems, the present application provides a dc power metering device, including: the device comprises a metering circuit, a voltage and current sampling circuit, a control chip and a relay; the relay is arranged between equipment electric equipment and a load;
the first input end of the voltage and current sampling circuit is connected with a power supply line of the standby power equipment, the second input end of the voltage and current sampling circuit is connected with a ground line of the standby power equipment, and the output end of the voltage and current sampling circuit is connected with the input end of the metering circuit and is used for collecting the output voltage value and the output current value of the standby power equipment to the load and transmitting the output voltage value and the output current value to the metering circuit;
the output end of the metering circuit is connected with the input end of the control chip and is used for acquiring an output electric energy value of the standby electric equipment to the load according to the output voltage value and the output current value and transmitting the output electric energy value to the control chip;
and the control end of the control chip is connected with the control end of the relay and is used for controlling the conduction of the relay according to the output electric energy value.
Preferably, the voltage and current sampling circuit comprises a voltage sampling circuit and a current sampling circuit;
the first input end of the voltage sampling circuit is connected with a power supply line of the standby power equipment, the second input end of the voltage sampling circuit is connected with a ground line of the standby power equipment, and the output end of the voltage sampling circuit is connected with the voltage input end of the metering circuit and is used for collecting the output voltage value of the standby power equipment to the load and transmitting the output voltage value to the metering circuit;
the first input end and the second input end of the current sampling circuit are both connected with a power supply line of the standby power equipment, and the output end of the current sampling circuit is connected with the current input end of the metering circuit and is used for collecting the output current value of the standby power equipment to the load and transmitting the output current value to the metering circuit;
the first input end of the voltage sampling circuit, the first input end of the current sampling circuit and the second input end of the current sampling circuit are used as the first input end of the voltage current sampling circuit together; a second input end of the voltage sampling circuit is used as a second input end of the voltage and current sampling circuit; the output end of the voltage sampling circuit and the output end of the current sampling circuit are used as the output end of the voltage current sampling circuit together; the voltage input end of the metering circuit and the current input end of the metering circuit are used as the input end of the metering circuit together.
Preferably, the metering circuit comprises: a metering chip and a transmission circuit;
a first pin of the metering chip is used as a voltage input end of the metering circuit; the second pin and the third pin of the metering chip are used as current input ends of the metering chip together; the fourth pin and the fifth pin of the metering chip are respectively connected with the first input end and the second input end of the transmission circuit; the first output end and the second output end of the transmission circuit are used as the output end of the metering circuit together.
Preferably, the voltage sampling circuit includes: the first resistor, the second resistor and the first capacitor;
the first end of the first resistor is connected with the first end of the second resistor and the first end of the first capacitor, and the second end of the second resistor is connected with the second end of the first capacitor;
the second end of the first resistor is used as a first input end of the voltage sampling circuit; a common end formed by the second end of the second resistor and the second end of the first capacitor is used as a second input end of the voltage sampling circuit; the first end of the second resistor is used as the output end of the voltage sampling circuit.
Preferably, the current sampling circuit includes: the third resistor, the fourth resistor, the second capacitor and the third capacitor;
the first end of the third resistor is connected with the first end of the second capacitor, the first end of the fourth resistor is connected with the first end of the third capacitor, and the second end of the second capacitor is connected with the second end of the third capacitor and is grounded;
the second end of the third resistor and the second end of the fourth resistor are respectively used as a first input end and a second input end of the current sampling circuit; the first end of the third resistor and the first end of the fourth resistor are used as output ends of the current sampling circuit together.
Preferably, the transmission circuit includes: a transformer;
the primary side first end and the primary side second end of the transformer are respectively used as a first input end and a second input end of the transmission circuit; the first end of the secondary side and the second end of the secondary side of the transformer are respectively used as a first output end and a second output end of the transmission circuit.
Preferably, the transmission circuit further includes: common mode inductance, first diode, second diode, fifth resistor, sixth resistor and transient voltage suppression diode;
the first end of the common-mode inductor is connected with the primary side first end of the transformer, and the second end of the common-mode inductor is connected with the primary side second end of the transformer;
the first end of the secondary side of the transformer is connected with the first end of the fifth resistor and the first end of the transient voltage suppression diode, the second end of the secondary side of the transformer is connected with the first end of the sixth resistor and the second end of the transient voltage suppression diode, and the third end of the transient voltage suppression diode is grounded;
the second end of the fifth resistor is connected with the cathode of the first diode, the second end of the sixth resistor is connected with the cathode of the second diode, and the anode of the first diode and the anode of the second diode are grounded;
the third end and the fourth end of the common-mode inductor are respectively used as a first input end and a second input end of the transmission circuit; the second end of the fifth resistor and the second end of the sixth resistor are respectively used as a first output end and a second output end of the transmission circuit.
Preferably, a fuse is also included;
the fuse is arranged between the relay and the load and is used for carrying out short-circuit protection on the load.
In order to solve the technical problems, the application also provides a direct-current electric energy metering method which is applied to the direct-current electric energy metering device; the method comprises the following steps:
acquiring an output electric energy value of standby electric equipment transmitted by a metering circuit to a load; the output electric energy value is obtained by the metering circuit according to the output voltage value and the output current value of the standby equipment to the load; the output voltage value and the output current value are collected by a voltage and current sampling circuit;
and controlling the conduction of the relay according to the output electric energy value.
Preferably, the method further comprises:
establishing communication connection with the standby power equipment;
transmitting electricity consumption information to the standby equipment through the communication connection;
the power utilization information at least comprises input and output voltage information, current information, power information, electric energy freezing information, module temperature information, overload state, on-off times, tripping and closing control information and system time information.
The application provides a direct-current electric energy metering device which comprises a metering circuit, a voltage and current sampling circuit, a control chip and a relay, wherein the metering circuit is connected with the voltage and current sampling circuit; wherein the relay is arranged between the equipment electrical equipment and the load; the first input end of the voltage and current sampling circuit is connected with a power supply line of the standby power equipment, the second input end of the voltage and current sampling circuit is connected with a ground wire of the standby power equipment, and the output end of the voltage and current sampling circuit is connected with the input end of the metering circuit and is used for collecting the output voltage value and the output current value of the standby power equipment to the load and transmitting the output voltage value and the output current value to the metering circuit; the output end of the metering circuit is connected with the input end of the control chip, and is used for acquiring the output electric energy value of the standby electric equipment to the load according to the output voltage value and the output current value and transmitting the output electric energy value to the control chip; the control end of the control chip is connected with the control end of the relay and is used for controlling the conduction of the relay according to the output electric energy value. Therefore, the voltage and current sampling circuit is used for collecting the output voltage value and the output current value from the standby power equipment to the load, and the metering circuit is used for metering the electric energy of the collected output voltage value and output current value, so that the accurate metering of the output electric energy of the standby power equipment to the load is realized. The relay is further controlled to be conducted through the control chip, so that the control of the standby power equipment on the output of the load power is realized, and the safety of the equipment is ensured.
In addition, the application also provides a direct-current electric energy metering method, and the effects are the same as the above.
Drawings
For a clearer description of embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic diagram of a dc power metering device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another DC power metering device according to an embodiment of the present application;
FIG. 3 is a circuit diagram of a metering circuit and a voltage-current sampling circuit according to an embodiment of the present application;
fig. 4 is a circuit diagram of a transmission circuit according to an embodiment of the present application;
fig. 5 is a flowchart of a direct current electric energy metering method according to an embodiment of the present application.
Wherein 8 is a standby device, 9 is a load, 10 is a metering circuit, 11 is a voltage and current sampling circuit, 12 is a control chip, 13 is a relay, 14 is a fuse, 111 is a voltage sampling circuit, 112 is a current sampling circuit, 101 is a metering chip, and 102 is a transmission circuit.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.
The application provides a direct-current electric energy metering device and a direct-current electric energy metering method, which aim to solve the problem that the existing standby electric equipment cannot meter multiple paths of output electric energy respectively.
In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description.
At present, equipment of a base station operator adopts direct current power supply, specifically, the power supplier provides direct current power supply through standby power equipment, and fees are charged to the base station operator according to actual power consumption. Wherein the standby device may provide multiple outputs.
However, although the differentiated standby power equipment applied to the dc power supply of the base station operator can provide multiple outputs, the standby power equipment can only measure the total power of the multiple outputs, but cannot obtain the power consumption of each output, that is, cannot obtain the actual power consumption of each connected operator equipment. If each operator is provided with a piece of standby power equipment, equipment resource waste can be caused.
In view of the above problems, the present application provides a direct current electric energy metering device, so as to solve the problem that the existing standby electric equipment cannot meter multiple output electric energy respectively. It should be noted that the device provided by the application is applied to one output of multiple outputs of the standby power equipment; the direct current electric energy metering device can meter electric energy of one output of the standby electric equipment. If the power is to be measured for the multiple outputs of the standby power equipment, a direct current power measuring device is required to be correspondingly arranged for each output.
Fig. 1 is a schematic diagram of a dc power metering device according to an embodiment of the present application. As shown in fig. 1, the apparatus includes: a metering circuit 10, a voltage and current sampling circuit 11, a control chip 12 and a relay 13; wherein the relay 13 is arranged between the equipment electrical device 8 and the load 9;
the first input end of the voltage and current sampling circuit 11 is connected with a power supply line of the standby power equipment 8, the second input end of the voltage and current sampling circuit 11 is connected with a ground line of the standby power equipment 8, and the output end of the voltage and current sampling circuit 11 is connected with the input end of the metering circuit 10 and is used for collecting the output voltage value and the output current value of the standby power equipment 8 to the load 9 and transmitting the output voltage value and the output current value to the metering circuit 10;
the output end of the metering circuit 10 is connected with the input end of the control chip 12, and is used for acquiring the output electric energy value of the standby equipment 8 to the load 9 according to the output voltage value and the output current value, and transmitting the output electric energy value to the control chip 12;
the control end of the control chip 12 is connected with the control end of the relay 13, and is used for controlling the conduction of the relay 13 according to the output electric energy value.
Specifically, the two paths of output of the standby electric equipment are a power supply line and a ground line respectively, and the relay is arranged between the standby electric equipment and the load and can be controlled to be conducted so as to conduct the standby electric equipment and the load. In this embodiment, the power supply line is not limited to the power supply voltage of the load, and depends on the specific implementation. The first input end of the voltage and current sampling circuit is connected with a power supply line of the standby power equipment, the second input end of the voltage and current sampling circuit is connected with a ground wire of the standby power equipment, and the output voltage value and the output current value which are output to the load by the standby power equipment can be collected. Meanwhile, the output end of the voltage and current sampling circuit is connected with the input end of the metering circuit, and the collected output voltage value and output current value can be transmitted to the metering circuit. It should be noted that the specific structure of the voltage and current sampling circuit in this embodiment is not limited, and depends on the specific implementation.
The metering circuit can receive the output voltage value and the output current value transmitted by the voltage and current sampling circuit, obtain the output electric energy value of the standby electric equipment to the load according to the output voltage value and the output current value, and transmit the electric energy value to the control chip through the output end of the standby electric equipment. The specific structure of the metering circuit in this embodiment is not limited, and depends on the specific implementation.
The control chip is a core control device of the direct current electric energy metering device. The control end of the control chip is connected with the control end of the relay, and the relay can be controlled to be conducted according to the output electric energy value, namely, the electric energy output from the standby electric equipment to the load is controlled. For example, when the control chip detects that the output current is greater than the set current, the relay is opened to disconnect the power output of the standby power equipment to the load, so that the equipment is protected. The specific type of the control chip in this embodiment is not limited, and depends on the specific implementation. In addition, in the implementation, a second voltage and current sampling circuit can be further arranged at the output end of the relay (namely the input end of the load) to collect the current and the voltage input to the load; the current and voltage acquired by the first voltage and current sampling circuit are combined to detect the conduction condition of the relay, so that the control chip can better control the relay.
In addition, the control chip can also establish communication connection with the standby power equipment through the communication interface, so that an instruction issued by the standby power equipment is received through the communication connection; and the related information of the direct-current electric energy metering device can be fed back to the standby electric equipment through communication connection.
In this embodiment, the direct current electric energy metering device includes a metering circuit, a voltage and current sampling circuit, a control chip and a relay; wherein the relay is arranged between the equipment electrical equipment and the load; the first input end of the voltage and current sampling circuit is connected with a power supply line of the standby power equipment, the second input end of the voltage and current sampling circuit is connected with a ground wire of the standby power equipment, and the output end of the voltage and current sampling circuit is connected with the input end of the metering circuit and is used for collecting the output voltage value and the output current value of the standby power equipment to the load and transmitting the output voltage value and the output current value to the metering circuit; the output end of the metering circuit is connected with the input end of the control chip, and is used for acquiring the output electric energy value of the standby electric equipment to the load according to the output voltage value and the output current value and transmitting the output electric energy value to the control chip; the control end of the control chip is connected with the control end of the relay and is used for controlling the conduction of the relay according to the output electric energy value. Therefore, the voltage and current sampling circuit is used for collecting the output voltage value and the output current value from the standby power equipment to the load, and the metering circuit is used for metering the electric energy of the collected output voltage value and output current value, so that the accurate metering of the output electric energy of the standby power equipment to the load is realized. The relay is further controlled to be conducted through the control chip, so that the control of the standby power equipment on the output of the load power is realized, and the safety of the equipment is ensured.
Fig. 2 is a schematic diagram of another dc power metering device according to an embodiment of the present application. On the basis of the above-described embodiments, in some embodiments, as shown in fig. 2, the voltage-current sampling circuit 11 includes a voltage sampling circuit 111 and a current sampling circuit 112;
the first input end of the voltage sampling circuit 111 is connected with a power supply line of the standby electric equipment 8, the second input end of the voltage sampling circuit 111 is connected with a ground line of the standby electric equipment 8, and the output end of the voltage sampling circuit 111 is connected with the voltage input end of the metering circuit 10 and is used for collecting the output voltage value of the standby electric equipment 8 to the load 9 and transmitting the output voltage value to the metering circuit 10;
the first input end and the second input end of the current sampling circuit 112 are both connected with a power supply line of the standby power equipment 8, and the output end of the current sampling circuit 112 is connected with the current input end of the metering circuit 10 and is used for collecting the output current value of the standby power equipment 8 to the load 9 and transmitting the output current value to the metering circuit 10;
the first input end of the voltage sampling circuit, the first input end of the current sampling circuit and the second input end of the current sampling circuit are used as the first input end of the voltage current sampling circuit together; the second input end of the voltage sampling circuit is used as the second input end of the voltage and current sampling circuit; the output end of the voltage sampling circuit and the output end of the current sampling circuit are used as the output end of the voltage current sampling circuit together; the voltage input of the metering circuit and the current input of the metering circuit are used together as the input of the metering circuit.
Specifically, the voltage-current sampling circuit is mainly divided into two parts, a voltage sampling circuit and a current sampling circuit. It can be understood that the voltage sampling circuit collects the output voltage value of the load by the standby power equipment, and the current sampling circuit collects the output current value of the load by the standby power equipment, so that the voltage and current collection of the voltage and current sampling circuit is realized respectively. In this embodiment, the specific structures of the voltage sampling circuit and the current sampling circuit are not limited, and depend on the specific implementation.
Based on the above embodiments, in some embodiments, as shown in fig. 2, the metering circuit 10 includes: a metering chip 101 and a transmission circuit 102;
a first pin of the metering chip 101 is used as a voltage input end of the metering circuit 10; the second pin and the third pin of the metering chip 101 are used together as a current input end of the metering chip 10; the fourth pin and the fifth pin of the metering chip 101 are respectively connected with the first input end and the second input end of the transmission circuit 102; the first output and the second output of the transmission circuit 102 together serve as the output of the metering circuit 10.
Specifically, the metering circuit is composed of a metering chip and a transmission circuit. The metering chip is used for calculating the total output electric energy value according to the acquired output voltage value and output current value. In this embodiment, the specific model of the metering chip is not limited, and depends on the specific implementation.
In addition, the transmission circuit is used for transmitting the output electric energy value calculation result obtained by the metering chip to the control chip. The specific structure of the transmission circuit in this embodiment is not limited, and depends on the specific implementation.
Fig. 3 is a circuit diagram of a metering circuit and a voltage-current sampling circuit according to an embodiment of the present application. Based on the above embodiments, in some embodiments, as shown in fig. 3, the voltage sampling circuit 111 includes: the first resistor R1, the second resistor R2 and the first capacitor C1;
the first end of the first resistor R1 is connected with the first end of the second resistor R2 and the first end of the first capacitor C1, and the second end of the second resistor R2 is connected with the second end of the first capacitor C1;
wherein the second end of the first resistor R1 is used as the first input end of the voltage sampling circuit 111; a common terminal formed by the second terminal of the second resistor R2 and the second terminal of the first capacitor C1 is used as a second input terminal of the voltage sampling circuit 111; the first terminal of the second resistor R2 serves as an output terminal of the voltage sampling circuit 111.
Specifically, in the voltage sampling circuit, the second end of the first resistor is used as a first input end to be connected with a power supply line of the standby electric equipment, and the common end formed by the second end of the second resistor and the second end of the first capacitor is used as a second input end to be connected with a ground line of the standby electric equipment. The first end of the second resistor is used as the output end of the voltage sampling circuit and is connected with the voltage input end of the metering circuit.
It should be noted that, in this embodiment, the specific types of the resistors and the capacitors in the voltage sampling circuit are not limited, and depend on the specific implementation.
In addition, on the basis of the embodiment, other electronic elements can be added or replaced in the implementation, so as to achieve better voltage acquisition effect. For example, the first resistor is replaced by two sub-resistors to achieve better voltage dividing effect.
As shown in fig. 3, in some embodiments, the current sampling circuit 112 includes: the third resistor R3, the fourth resistor R4, the second capacitor C2 and the third capacitor C3;
the first end of the third resistor R3 is connected with the first end of the second capacitor C2, the first end of the fourth resistor R4 is connected with the first end of the third capacitor C3, the second end of the second capacitor C2 is connected with the second end of the third capacitor C3, and the signal is grounded;
the second end of the third resistor R3 and the second end of the fourth resistor R4 are respectively used as a first input end and a second input end of the current sampling circuit 112; the first end of the third resistor R3 and the first end of the fourth resistor R4 are commonly used as the output terminal of the current sampling circuit 112.
Specifically, the current sampling circuit is connected in series to the power supply line of the standby power equipment, and specifically, the second end of the third resistor and the second end of the fourth resistor are respectively used as the first input end and the second input end of the current sampling circuit to be connected in series to the power supply line of the standby power equipment, so that current collection is realized.
It should be noted that, in this embodiment, the specific types of the resistors and the capacitors in the current sampling circuit are not limited, and depend on the specific implementation.
As shown in fig. 3, in some embodiments, the transmission circuit 102 includes: a transformer T1;
the primary side first end and the primary side second end of the transformer T1 are respectively used as a first input end and a second input end of the transmission circuit 102; the secondary first end and the secondary second end of the transformer T1 are respectively used as a first output end and a second output end of the transmission circuit 102.
Specifically, the transformer in the transmission circuit mainly plays an isolating role, namely, the metering chip and the control chip are isolated. In this embodiment, the specific model of the transformer is not limited, and depends on the specific implementation. In addition, other devices may be included in the transmission circuit, which is not limited in this embodiment, and depends on the specific implementation.
Fig. 4 is a circuit diagram of a transmission circuit according to an embodiment of the present application. Based on the above embodiments, in some embodiments, as shown in fig. 4, the transmission circuit 102 further includes: common-mode inductance LX1, first diode D1, second diode D2, fifth resistor R5, sixth resistor R6, and transient voltage suppression diode TVS;
the first end of the common-mode inductor LX1 is connected with the first end of the primary side of the transformer T1, and the second end of the common-mode inductor LX1 is connected with the second end of the primary side of the transformer T1;
the first end of the secondary side of the transformer T1 is connected with the first end of the fifth resistor R5 and the first end of the transient voltage suppression diode TVS, the second end of the secondary side of the transformer T1 is connected with the first end of the sixth resistor R6 and the second end of the transient voltage suppression diode TVS, and the third end of the transient voltage suppression diode TVS is grounded;
the second end of the fifth resistor R5 is connected with the cathode of the first diode D1, the second end of the sixth resistor R6 is connected with the cathode of the second diode D2, and the anode of the first diode D1 and the anode of the second diode D2 are grounded;
the third terminal and the fourth terminal of the common-mode inductor LX1 are respectively used as a first input terminal and a second input terminal of the transmission circuit 102; the second terminal of the fifth resistor R5 and the second terminal of the sixth resistor R6 are respectively used as the first output terminal and the second output terminal of the transmission circuit 102.
Specifically, the common mode inductor is arranged between the metering chip and the transformer, so that the anti-interference effect is realized. In this embodiment, the specific model of the common-mode inductor is not limited, and depends on the specific implementation. In addition, in order to further prevent the control chip from being damaged by current-voltage surge, in this embodiment, the transmission circuit further includes a protection circuit composed of a transient voltage suppression diode, a fifth resistor, a sixth resistor, a first diode, and a second diode.
The transient voltage suppressing diode (Transient voltage suppression diode, TVS) is an electronic component for protection, which can protect electrical equipment from voltage spikes introduced by the wires. In this embodiment, the transient voltage suppression diode is connected in parallel in the circuit; when the voltage exceeds the breakdown level, the excessive current is directly shunted. Therefore, the common-mode inductor, the transient voltage suppression diode, the fifth resistor, the sixth resistor, the first diode and the second diode can protect the control chip from being damaged on the premise of realizing the function of the transmission circuit, and the anti-interference capability is improved.
Based on the above embodiments, in some embodiments, as shown in fig. 2, the dc power metering device further includes a fuse 14;
the fuse 14 is provided between the relay 14 and the load 9, and is used for short-circuit protection of the load 9.
Specifically, the fuse plays a short-circuit protection role. When the current of the loop between the standby equipment and the load is too large due to short circuit and the like, the fuse is fused, so that the loop is opened, and the load is protected. It should be noted that the specific type of the fuse in this embodiment is not limited, and depends on the specific implementation.
Fig. 5 is a flowchart of a direct current electric energy metering method according to an embodiment of the present application. The method is applied to the direct-current electric energy metering device; as shown in fig. 5, the method includes:
s10: and obtaining the output electric energy value of the standby electric equipment transmitted by the metering circuit to the load.
The output electric energy value is obtained by the metering circuit according to the output voltage value and the output current value of the standby equipment to the load; the output voltage value and the output current value are collected by a voltage-current sampling circuit.
S11: and controlling the conduction of the relay according to the output electric energy value.
Specifically, the control chip can acquire the output electric energy value of the standby electric equipment transmitted by the metering circuit to the load. The output electric energy value is obtained by the metering circuit according to the output voltage value and the output current value of the standby equipment to the load; and the output voltage value and the output current value are collected by a voltage-current sampling circuit. The control chip is used as a core element of the direct-current electric energy metering device and can control the conduction of the relay according to the obtained output electric energy value. Therefore, not only is output electric energy metering realized, but also the control of the output of the standby electric equipment to the load is realized.
On the basis of the above embodiments, in some embodiments, the method further includes:
s12: a communication connection is established with the standby device.
S13: and transmitting the electricity utilization information to the standby equipment through a communication connection.
The power utilization information at least comprises input and output voltage information, current information, power information, electric energy freezing information, module temperature information, overload state, on-off times, tripping and closing control information and system time information.
In specific implementation, the communication connection between the direct-current electric energy metering device and the standby electric device can be established through the control chip. Specifically, the communication connection can be initiated by the standby power equipment, and after the control chip of the direct-current electric energy metering device responds, the communication connection of the standby power equipment and the control chip is established. Based on the communication connection, the control chip can transmit the power consumption information of the load and the related information of the device to the standby equipment. The power consumption information at least includes input/output voltage information, current information, power information, electric energy freezing information, module temperature information, overload state, on-off times, switching control information and system time information, and may also include other information, which is not limited in this embodiment.
It should be noted that, in this embodiment, the specific type of communication connection between the dc power metering device and the standby power device is not limited, and may be, for example, bluetooth communication, or wireless network communication, depending on the specific implementation.
The direct current electric energy metering device and the method provided by the application are described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A direct current power metering device, comprising: the measuring circuit (10), the voltage and current sampling circuit (11), the control chip (12) and the relay (13); wherein the relay (13) is arranged between the standby equipment (8) and the load (9);
the first input end of the voltage and current sampling circuit (11) is connected with a power supply line of the standby power equipment (8), the second input end of the voltage and current sampling circuit (11) is connected with a ground wire of the standby power equipment (8), and the output end of the voltage and current sampling circuit (11) is connected with the input end of the metering circuit (10) and is used for collecting an output voltage value and an output current value of the standby power equipment (8) to the load (9) and transmitting the output voltage value and the output current value to the metering circuit (10);
the output end of the metering circuit (10) is connected with the input end of the control chip (12) and is used for acquiring the output electric energy value of the standby electric equipment (8) to the load (9) according to the output voltage value and the output current value and transmitting the output electric energy value to the control chip (12);
the control end of the control chip (12) is connected with the control end of the relay (13) and is used for controlling the conduction of the relay (13) according to the output electric energy value.
2. The direct current power metering device according to claim 1, wherein the voltage-current sampling circuit (11) comprises a voltage sampling circuit (111) and a current sampling circuit (112);
the first input end of the voltage sampling circuit (111) is connected with a power supply line of the standby power equipment (8), the second input end of the voltage sampling circuit (111) is connected with a ground wire of the standby power equipment (8), and the output end of the voltage sampling circuit (111) is connected with a voltage input end of the metering circuit (10) and is used for collecting the output voltage value of the standby power equipment (8) to the load (9) and transmitting the output voltage value to the metering circuit (10);
the first input end and the second input end of the current sampling circuit (112) are both connected with a power supply line of the standby power equipment (8), and the output end of the current sampling circuit (112) is connected with the current input end of the metering circuit (10) and is used for collecting the output current value of the standby power equipment (8) to the load (9) and transmitting the output current value to the metering circuit (10);
wherein a first input end of the voltage sampling circuit (111), a first input end and a second input end of the current sampling circuit (112) are used as a first input end of the voltage and current sampling circuit (11) together; a second input terminal of the voltage sampling circuit (111) is used as a second input terminal of the voltage and current sampling circuit (11); the output end of the voltage sampling circuit (111) and the output end of the current sampling circuit (112) are used as the output end of the voltage and current sampling circuit (11) together; the voltage input of the metering circuit (10) and the current input of the metering circuit (10) are used together as inputs of the metering circuit (10).
3. The direct current power metering device according to claim 2, characterized in that the metering circuit (10) comprises: a metering chip (101) and a transmission circuit (102);
a first pin of the metering chip (101) is used as a voltage input end of the metering circuit (10); the second pin and the third pin of the metering chip (101) are used as current input ends of the metering chip (101) together; the fourth pin and the fifth pin of the metering chip (101) are respectively connected with the first input end and the second input end of the transmission circuit (102); the first output and the second output of the transmission circuit (102) together serve as the output of the metering circuit (10).
4. The direct current power metering device according to claim 2, wherein the voltage sampling circuit (111) comprises: the first resistor, the second resistor and the first capacitor;
the first end of the first resistor is connected with the first end of the second resistor and the first end of the first capacitor, and the second end of the second resistor is connected with the second end of the first capacitor;
wherein the second end of the first resistor is used as a first input end of the voltage sampling circuit (111); a common terminal formed by the second end of the second resistor and the second end of the first capacitor is used as a second input terminal of the voltage sampling circuit (111); the first end of the second resistor is used as an output end of the voltage sampling circuit (111).
5. The direct current power metering device of claim 2 wherein the current sampling circuit (112) comprises: the third resistor, the fourth resistor, the second capacitor and the third capacitor;
the first end of the third resistor is connected with the first end of the second capacitor, the first end of the fourth resistor is connected with the first end of the third capacitor, and the second end of the second capacitor is connected with the second end of the third capacitor and is grounded;
wherein the second end of the third resistor and the second end of the fourth resistor are respectively used as a first input end and a second input end of the current sampling circuit (112); the first end of the third resistor and the first end of the fourth resistor are used together as an output end of the current sampling circuit (112).
6. A direct current electric energy metering device according to claim 3, characterized in that the transmission circuit (102) comprises: a transformer;
wherein the primary side first end and the primary side second end of the transformer are respectively used as a first input end and a second input end of the transmission circuit (102); the secondary side first end and the secondary side second end of the transformer are respectively used as a first output end and a second output end of the transmission circuit (102).
7. The direct current power metering device of claim 6 wherein the transmission circuit (102) further comprises: common mode inductance, first diode, second diode, fifth resistor, sixth resistor and transient voltage suppression diode;
the first end of the common-mode inductor is connected with the primary side first end of the transformer, and the second end of the common-mode inductor is connected with the primary side second end of the transformer;
the first end of the secondary side of the transformer is connected with the first end of the fifth resistor and the first end of the transient voltage suppression diode, the second end of the secondary side of the transformer is connected with the first end of the sixth resistor and the second end of the transient voltage suppression diode, and the third end of the transient voltage suppression diode is grounded;
the second end of the fifth resistor is connected with the cathode of the first diode, the second end of the sixth resistor is connected with the cathode of the second diode, and the anode of the first diode and the anode of the second diode are grounded;
wherein the third and fourth terminals of the common-mode inductor are respectively used as a first input terminal and a second input terminal of the transmission circuit (102); the second end of the fifth resistor and the second end of the sixth resistor are respectively used as a first output end and a second output end of the transmission circuit (102).
8. The direct current electric energy metering device according to any of claims 1 to 7, further comprising a fuse (14);
the fuse (14) is arranged between the relay (13) and the load (9) and is used for carrying out short-circuit protection on the load (9).
9. A method of dc power metering, characterized by being applied to the dc power metering device of any one of the above claims 1 to 8; the method comprises the following steps:
acquiring an output electric energy value of standby electric equipment transmitted by a metering circuit to a load; the output electric energy value is obtained by the metering circuit according to the output voltage value and the output current value of the standby equipment to the load; the output voltage value and the output current value are collected by a voltage and current sampling circuit;
and controlling the conduction of the relay according to the output electric energy value.
10. The direct current power metering method of claim 9, further comprising:
establishing communication connection with the standby power equipment;
transmitting electricity consumption information to the standby equipment through the communication connection;
the power utilization information at least comprises input and output voltage information, current information, power information, electric energy freezing information, module temperature information, overload state, on-off times, tripping and closing control information and system time information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311384886.XA CN117110706A (en) | 2023-10-25 | 2023-10-25 | Direct-current electric energy metering device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311384886.XA CN117110706A (en) | 2023-10-25 | 2023-10-25 | Direct-current electric energy metering device and method |
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