CN111537792A - Multi-power-supply electricity metering device and method - Google Patents
Multi-power-supply electricity metering device and method Download PDFInfo
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- CN111537792A CN111537792A CN202010426180.5A CN202010426180A CN111537792A CN 111537792 A CN111537792 A CN 111537792A CN 202010426180 A CN202010426180 A CN 202010426180A CN 111537792 A CN111537792 A CN 111537792A
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- 230000005611 electricity Effects 0.000 title claims description 48
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- 238000004891 communication Methods 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 3
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
Abstract
The embodiment of the invention discloses an electric quantity metering device and an electric quantity metering method with multiple power supplies, wherein the electric quantity metering device comprises: the system comprises at least two signal trigger units and at least one electric energy meter, wherein the at least two signal trigger units are electrically connected with the at least one electric energy meter; the at least two signal trigger units comprise a first signal trigger unit and a second signal trigger unit; the electric energy meter comprises a control unit and an electric quantity metering unit, the control unit is electrically connected with the electric quantity metering unit and is used for receiving trigger signals, the trigger signals comprise a first trigger signal and a second trigger signal, and the electric quantity metering unit is controlled to conduct shunting time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signals. The electric quantity metering device and the electric quantity metering method for multi-power supply provided by the embodiment of the invention can realize shunt time-sharing metering of each power supply electric quantity.
Description
Technical Field
The embodiment of the invention relates to an electric quantity metering technology, in particular to an electric quantity metering device and an electric quantity metering method with multiple power supplies for power supply.
Background
The electric energy metering is a terminal link of an electric power network, and the reliable metering of a metering device such as an electric energy meter powered by multiple power supplies is not only related to the national civilization, but also plays an extremely important role in the aspects of improving the customer service quality, ensuring the accurate reading and verification, reducing customer complaints and the like of an electric power enterprise.
At present, the electric quantity metering device of current many powers supply, the electric quantity of measurement is the total electric quantity of a plurality of powers supplies usually, and when the power supply switches over, electric quantity metering device can't divide the branch and divide the electric quantity that every power cord of timesharing measurement supplied out, and this kind of condition has brought great difficult problem for the line loss analysis, includes that the line loss problem that leads to is difficult to the accurate judgement to the inconsistent signal string platform district that causes of archives.
Disclosure of Invention
The embodiment of the invention provides an electric quantity metering device and an electric quantity metering method with multiple power supplies, which are used for realizing shunt time-sharing metering of each power supply electric quantity.
In a first aspect, an embodiment of the present invention provides a multi-power-supply electricity metering device, including: the system comprises at least two signal trigger units and at least one electric energy meter, wherein the at least two signal trigger units are electrically connected with the at least one electric energy meter;
the at least two signal trigger units comprise a first signal trigger unit and a second signal trigger unit, the electric energy meter and the first signal trigger unit are electrically connected with the output end of the first power supply, and the electric energy meter and the second signal trigger unit are electrically connected with the output end of the second power supply; the first signal trigger unit and the second signal trigger unit are both electrically connected with the electric energy meter; the first power supply and the second power supply are used for supplying power to the electric energy meter in a time-sharing manner;
the first signal trigger unit is used for generating a first trigger signal when the first power supply supplies power and sending the first trigger signal to the electric energy meter; the second signal trigger unit is used for generating a second trigger signal when a second power supply supplies power and sending the second trigger signal to the electric energy meter;
the electric energy meter comprises a control unit and an electric quantity metering unit, the control unit is electrically connected with the electric quantity metering unit and is used for receiving trigger signals, the trigger signals comprise a first trigger signal and a second trigger signal, and the electric quantity metering unit is controlled to conduct shunting time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signals.
Optionally, the control unit is configured to control the electric quantity metering unit to meter the electric quantity of the first power supply when receiving the first trigger signal, and record a time for the electric quantity metering unit to meter the electric quantity of the first power supply; the control unit is used for controlling the electric quantity metering unit to meter the electric quantity of the second power supply and recording the time for metering the electric quantity of the second power supply by the electric quantity metering unit when receiving the second trigger signal.
Optionally, the control unit is further configured to determine that an instantaneous fault occurs in a line where the electricity metering device is located when at least two state transitions exist between the first trigger signal and the second trigger signal received within a preset time period, and generate an alarm signal; the control unit is further used for determining that the first power supply and the second power supply are in a normal switching state when one state jump exists between the first trigger signal and the second trigger signal received within a preset time period, and generating a power supply normal switching signal.
Optionally, the control unit is in communication connection with the master station, and the control unit is further configured to send the alarm signal, the power supply normal switching signal, and the electric quantity measured by the electric quantity measuring unit to the master station.
Optionally, the electric energy meter further includes a calibration pulse unit electrically connected to the control unit and configured to calibrate the trigger signal received by the control unit.
Optionally, the electric energy meter further comprises a liquid crystal display screen electrically connected with the control unit, the control unit is used for receiving the electric quantity measured by the electric quantity measuring unit and sending the received electric quantity to the liquid crystal display screen, and the liquid crystal display screen is used for displaying the electric quantity sent by the control unit.
Optionally, the output end of the first power supply and the output end of the second power supply are both electrically connected with the electric quantity metering unit through a transformer, and the first signal trigger unit and the second signal trigger unit are both electrically connected with the control unit; the first power supply and the output end of the first power supply comprise a first change-over switch, the second power supply and the output end of the second power supply comprise a second change-over switch, the first signal trigger unit is used for detecting the state of the first change-over switch and generating a first trigger signal when detecting that the first change-over switch is closed, and the second signal trigger unit is used for detecting the state of the second change-over switch and generating a second trigger signal when detecting that the second change-over switch is closed.
In a second aspect, an embodiment of the present invention further provides a multi-power-supply electricity metering method, which is performed by the electricity metering device in the first aspect, and the electricity metering method includes:
receiving a trigger signal, wherein the trigger signal comprises a first trigger signal and a second trigger signal;
and controlling the electric quantity metering unit to perform shunt time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signal.
Optionally, according to the received trigger signal, controlling the electric quantity metering unit to perform branch time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply, including:
when a first trigger signal is received, controlling the electric quantity metering unit to meter the electric quantity of the first power supply, and recording the time for metering the electric quantity of the first power supply by the electric quantity metering unit;
and when the second trigger signal is received, controlling the electric quantity metering unit to meter the electric quantity of the second power supply, and recording the time for metering the electric quantity of the second power supply by the electric quantity metering unit.
Optionally, after receiving the trigger signal, the method further includes:
when at least two state jumps exist between a first trigger signal and a second trigger signal received within a preset time period, determining that the line where the electric quantity metering device is located has an instantaneous fault, and generating an alarm signal;
when one state jump exists between the first trigger signal and the second trigger signal received within a preset time period, the first power supply and the second power supply are determined to be in a normal switching state, and a power supply normal switching signal is generated.
The embodiment of the invention provides an electric quantity metering device and an electric quantity metering method with multiple power supplies, the electric quantity metering device comprises at least two signal trigger units and at least one electric energy meter, the at least two signal trigger units are electrically connected with the at least one electric energy meter, the at least two signal trigger units comprise a first signal trigger unit and a second signal trigger unit, the electric energy meter comprises a control unit and an electric quantity metering unit, when the first power supply supplies power, a first trigger signal is generated through the first signal trigger unit and is sent to the electric energy meter, when the second power supply supplies power, a second trigger signal is generated through the second signal trigger unit and is sent to the electric energy meter, the control unit receives the trigger signal, and controls the electric quantity metering unit to perform shunt time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signal, therefore, the shunt time-sharing metering of the power supply electric quantity of each power supply is realized through the electric quantity metering device with multiple power supplies for power supply.
Drawings
Fig. 1 is a block diagram of a multi-power-supply electricity metering device according to an embodiment of the present invention;
fig. 2 is a block diagram of a multi-power-supply electricity metering device according to a second embodiment of the present invention;
fig. 3 is a block diagram of an electric energy meter according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a multi-power-supply electricity metering device according to a second embodiment of the present invention;
FIG. 5 is a flowchart of a method for measuring electricity consumption by multiple power supplies according to a third embodiment of the present invention;
fig. 6 is a flowchart of a fault determination method according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a block diagram of a multi-power-supply electricity metering device according to an embodiment of the present invention, which is applicable to branch-time-sharing metering of power supply amounts of multiple power supply sources, and the like, and the electricity metering device includes: the electric energy meter comprises at least two signal trigger units and at least one electric energy meter 20, wherein the at least two signal trigger units comprise a first signal trigger unit 11 and a second signal trigger unit 12, and the electric energy meter 20 comprises a control unit 21 and an electric quantity metering unit 22.
Wherein, at least two signal trigger units are electrically connected with at least one electric energy meter 20; the electric energy meter 20 and the first signal trigger unit 11 are both electrically connected with an output end A1 of the first power supply 30, and the electric energy meter 20 and the second signal trigger unit 12 are both electrically connected with an output end B1 of the second power supply 40; the first signal trigger unit 11 and the second signal trigger unit 12 are both electrically connected with the electric energy meter 20; the first power supply 30 and the second power supply 40 are used for supplying power to the electric energy meter 20 in a time-sharing manner; the first signal triggering unit 11 is configured to generate a first triggering signal when the first power supply 30 supplies power, and send the first triggering signal to the electric energy meter 20; the second signal triggering unit 12 is configured to generate a second triggering signal when the second power source 40 supplies power, and send the second triggering signal to the electric energy meter 20; the control unit 21 is electrically connected to the electric quantity metering unit 22, and the control unit 21 is configured to receive a trigger signal, where the trigger signal includes a first trigger signal and a second trigger signal, and control the electric quantity metering unit 22 to perform branch time-sharing metering on the electric quantity of the first power supply 30 and the electric quantity of the second power supply 40 according to the received trigger signal.
The first trigger signal trigger unit 11 and the second trigger signal trigger unit 12 may be a pulse signal generator or a digital signal generator, that is, the first trigger signal and the second trigger signal may be a pulse signal or a digital signal, and may be specifically set according to an actual situation, which is not limited herein.
Optionally, the control unit 21 is configured to control the electric quantity metering unit 22 to meter the electric quantity of the first power supply 30 when receiving the first trigger signal, and record a time for the electric quantity metering unit 22 to meter the electric quantity of the first power supply 30; the control unit 21 is configured to control the electricity metering unit 22 to meter the electricity of the second power source 40 when receiving the second trigger signal, and record a time when the electricity metering unit 22 meters the electricity of the second power source 40.
Specifically, when the first power supply supplies power, the first signal triggering unit 11 generates a first triggering signal, the control unit 21 receives the first triggering signal, controls the electric quantity metering unit 22 to meter the electric quantity of the first power supply 30, and records the time when the electric quantity metering unit 22 meters the electric quantity of the first power supply 30, so that the power supply electric quantity of the first power supply and the time corresponding to the power supply electric quantity can be obtained; when the second power supply supplies power, the second signal triggering unit 12 generates a second triggering signal, the control unit 21 receives the second triggering signal, controls the electric quantity metering unit 22 to meter the electric quantity of the second power supply 40, and records the time of the electric quantity metering unit 22 to meter the electric quantity of the second power supply 40, so that the power supply electric quantity of the second power supply and the time corresponding to the power supply electric quantity can be obtained, namely, the shunt time-sharing metering of the power supply electric quantities of the first power supply and the second power supply is realized through the electric quantity metering device.
The electric quantity metering device with multiple power supplies provided by the embodiment generates a first trigger signal through the first signal trigger unit when the first power supply supplies power, and sends the first trigger signal to the electric energy meter, generates a second trigger signal through the second signal trigger unit when the second power supply supplies power, and sends the second trigger signal to the electric energy meter, and receives the trigger signal through the control unit, and controls the electric quantity metering unit to perform shunt time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signal, so that shunt time-sharing metering on the electric quantity supplied by each power supply is realized through the electric quantity metering device with multiple power supplies.
Example two
Fig. 2 is a block diagram of a multi-power-supply electricity metering device according to a second embodiment of the present invention, where this embodiment is based on the first embodiment, and referring to fig. 2, optionally, the control unit 21 is further configured to determine that a line where the electricity metering device is located has an instantaneous fault and generate an alarm signal when there are at least two state transitions between a first trigger signal and a second trigger signal received within a preset time period; the control unit 21 is further configured to determine that the first power supply and the second power supply are in a normal switching state when a state transition exists between the first trigger signal and the second trigger signal received within a preset time period, and generate a power supply normal switching signal.
For example, the first trigger signal and the second trigger signal may be digital signals, for example, the first trigger signal is 0, the second trigger signal is 1, if the trigger signal received by the control unit 21 within a preset time period, for example, 0.2s, is "0-1-0", that is, if there are at least two state transitions between the first trigger signal and the second trigger signal within the preset time period, the control unit 21 determines that the line where the electricity metering device is located has an instantaneous fault, and generates an alarm signal to prompt the instantaneous fault of the line; if the trigger signal received by the control unit 21 within the preset time period, for example, 0.2s, is "0-1-1", that is, a state jump exists between the first trigger signal and the second trigger signal within the preset time period, the control unit 21 determines that the first power supply 30 and the second power supply 40 are in the normal switching state, and generates a power supply normal switching signal to prompt that the state change is a state change of power supply switching, so as to determine whether the instantaneous fault or the power supply normal switching occurs according to the state jump of the trigger signal, thereby solving the problem that the existing electric quantity metering device cannot distinguish the conditions of the instantaneous fault and the power supply switching, and thus the fault false alarm occurs.
Optionally, the control unit 21 is in communication connection with the master station 100, and the control unit 21 is further configured to send the alarm signal, the power supply normal switching signal, and the electric quantity measured by the electric quantity measuring unit 22 to the master station 100.
Specifically, the master station 100 receives and stores the alarm signal, the normal power switching signal and the electric quantity, so that related personnel can check the alarm signal in real time conveniently, and when the master station 100 receives the alarm signal, corresponding prompt information can be sent out to prompt related personnel to take corresponding measures in time.
Optionally, the electric energy meter 20 further includes a verification pulse unit 23 electrically connected to the control unit 21, and configured to verify the trigger signal received by the control unit 21.
The check pulse unit 23 checks the trigger signal received by the control unit 21, so as to improve the reliability of the power supply quantity shunting and time-sharing measurement of the power supply quantity of each power supply by the quantity-of-electricity metering device.
Optionally, the electric energy meter 20 further includes a liquid crystal display 24 electrically connected to the control unit 21, the control unit 21 is configured to receive the electric quantity measured by the electric quantity measuring unit 22, and send the received electric quantity to the liquid crystal display 24, and the liquid crystal display 24 is configured to display the electric quantity sent by the control unit 21.
Wherein, the control unit 21 can receive and store the electric quantity of electric quantity metering unit 22 metering, and the electric quantity of electric quantity metering unit 22 metering still can send liquid crystal display 24 to show the electric quantity through liquid crystal display 24, be convenient for relevant personnel carry out the visual observation to the electric quantity through control unit 21.
Optionally, the output end a1 of the first power supply 30 and the output end B1 of the second power supply 40 are both electrically connected to the electricity metering unit 22 through the transformer 50, and the first signal triggering unit 11 and the second signal triggering unit 12 are both electrically connected to the control unit 21; the first power supply 30 includes a first switch 31 between itself output terminal a1, the second power supply 40 includes a second switch 41 between itself output terminal B1, the first signal trigger unit 11 is configured to detect a state of the first switch 31 and generate a first trigger signal when detecting that the first switch 31 is closed, and the second signal trigger unit 12 is configured to detect a state of the second switch 41 and generate a second trigger signal when detecting that the second switch 41 is closed.
Specifically, the transformer 50 may transform the voltages output by the output terminal a1 of the first power source 30 and the output terminal B1 of the second power source 40 into voltages that can be borne by the electricity metering unit 22. When the first switch 31 is closed, the first power supply 30 supplies power, the first signal trigger unit 11 generates a first trigger signal when detecting that the first switch 31 is closed, and the control unit 21 controls the electric quantity metering unit 22 to meter the electric quantity of the first power supply 30 and records the time for the electric quantity metering unit 22 to meter the electric quantity of the first power supply 30 when receiving the first trigger signal; when the second switch 41 is closed, the second power supply 40 supplies power, the second signal trigger unit 12 generates a second trigger signal when detecting that the second switch 41 is closed, and the control unit 21 controls the electric quantity metering unit 22 to meter the electric quantity of the second power supply 40 and records the time for metering the electric quantity of the second power supply 40 by the electric quantity metering unit 22 when receiving the second trigger signal, so that the shunt time-sharing metering of the electric quantity of each power supply by the electric quantity metering device with multiple power supplies is realized based on the first trigger signal and the second trigger signal respectively generated by the first signal trigger unit 11 and the second signal trigger unit 12.
In an implementation manner, fig. 3 is a structural block diagram of an electric energy meter provided in the second embodiment of the present invention, where the electric energy meter includes a control unit 21 and an electric quantity metering unit 22, the control unit 21 may be a single chip microcomputer control unit, the control unit 21 is externally connected with an RS485 interface 25, which is convenient for connecting to an electric energy collecting terminal, and the electric energy meter further includes a check pulse unit 23, a liquid crystal display 24, an infrared communication port 26, a watchdog circuit 27, a real-time clock circuit 28, a nonvolatile memory 29, an electric quantity metering indication unit 221 and a voltage divider current transformer 222 electrically connected to the electric quantity metering unit 22, and a data holding battery 223, a power management unit 224 and a power supply 225 electrically connected in sequence; the power supply 225 is electrically connected with the voltage divider current transformer 222, the check pulse unit 23 is electrically connected with the control unit 21 through the electric quantity metering unit 22, and a key field of a trigger signal is arranged in the electric energy meter so as to realize multi-power shunt metering; the control unit 21 can receive a trigger signal and an uncovering alarm signal of the electric energy meter, the trigger signal comprises a first trigger signal and a second trigger signal, the control unit 21 can generate a time interval switching signal according to the time interval of the received first trigger signal and the second trigger signal, and an RS485 interface 25 externally connected with the control unit 21 is convenient to be connected to an electric energy acquisition terminal; the diode is conducted in the process that the electric quantity metering unit 22 meters the electric quantity, and the red light flickers, so that operation and maintenance personnel can conveniently know that data reading is carried out at the moment, the electric quantity information metered by the electric quantity metering unit 22 is transmitted to the single chip microcomputer control unit, and the information is timely collected and stored through the nonvolatile memory; mobile device passing redThe external communication port 26 is convenient for collecting information such as electric quantity and power factor of the control unit 21, the watchdog circuit 27 can realize circuit monitoring and prevent the control unit 21 from operation collapse, the real-time clock circuit 28 can realize automatic time synchronization with the electric quantity collecting terminal and can automatically send self-displayed time to the control unit 21, the electric quantity metering indication unit 29 is electrically connected with the electric quantity metering unit 22 and can indicate the state of the electric quantity metering unit 22, and the voltage divider current transformer 222 outputs voltage U of each power supplya、Ub、UcAnd current Ia、Ib、IcThe value of (b) is reduced to a value that can be measured by the electricity amount measuring unit 22, so that the amount of power supplied to each power supply is measured by the electricity amount measuring unit 22.
For example, fig. 4 is a schematic structural diagram of a multi-power-supply electricity metering device according to a second embodiment of the present invention, referring to fig. 4, each electric energy meter 20 is electrically connected to a first power supply 30 and a second power supply 40 through a corresponding transformer 50, the first power supply 30 and the second power supply 40 are respectively in an incoming line cabinet G1 and a G2, one is a main power supply, the other is a standby power supply, G3 to G6 are outgoing line cabinets, an outgoing line transformer 50, the first power supply 30 and the second power supply 40 respectively supply power to an outgoing line load through the control of a first switch 31 and a second switch 41, and only one power supply is switched on in actual operation. When the first power supply 30 supplies power, G3 to G6 use power, and the power supply amount of G1 should be calculated; when the second power source 40 supplies power, which is also used for the power of G3 to G6, the power supply amount of G2 should be calculated, but since the electric energy meters 20 are all installed on the transformer 50 side to which the outgoing cables of G3 to G6 are connected, G3 to G6 correspond to the total amount of power of the outgoing load of the line on which the electric energy meter 20 calculates, and the power supply amounts of the first power source 30 and the second power source 40 on the power source side cannot be distinguished. Therefore, a first signal trigger unit (not shown in the figure) and a second signal trigger unit (not shown in the figure) are respectively arranged at the switchboards G1 and G2, wherein the first signal trigger unit can be arranged at the back of the switchboard G1, and the second signal trigger unit can be arranged at the back of the switchboard G2. When the first switch 31 is closed, corresponding to the power supply of the first power supply 30, the first signal trigger unit generates a first trigger signal when detecting that the first switch 31 is closed, and the control unit controls the electric quantity metering unit to meter the electric quantity of the first power supply 30 and records the time for the electric quantity metering unit to meter the electric quantity of the first power supply 30 when receiving the first trigger signal; when the second switch 41 is closed, the second power supply 40 supplies power, the second signal trigger unit generates a second trigger signal when detecting that the second switch 41 is closed, the control unit controls the electric quantity metering unit to meter the electric quantity of the second power supply 40 when receiving the second trigger signal, and records the time for the electric quantity metering unit to meter the electric quantity of the second power supply 40, so that the shunt time-sharing metering of the electric quantity metering device supplied by multiple power supplies to the electric quantity of each power supply is realized based on the first trigger signal and the second trigger signal respectively generated by the first signal trigger unit and the second signal trigger unit, and more accurate and reliable data support is provided for line loss analysis work.
The electric quantity metering device powered by multiple power supplies provided by this embodiment includes a first switch between a first power supply and a self output end, a second switch between a second power supply and the self output end, and a first signal trigger unit detects a state of the first switch and generates a first trigger signal when detecting that the first switch is turned off, and a second signal trigger unit detects a state of the second switch and generates a second trigger signal when detecting that the second switch is turned on, so that the electric quantity metering device powered by multiple power supplies performs shunt time-sharing metering of the electric quantity of each power supply based on the first trigger signal and the second trigger signal, and a control unit determines whether a state jump corresponds to an instantaneous fault or normal power supply switching according to the number of state jumps between the first trigger signal and the second trigger signal received within a preset time period, and corresponding warning signals or power supply normal switching signals are generated, so that the problem of fault false alarm caused by the fact that the existing electric quantity metering device cannot distinguish the conditions of instantaneous fault and power supply switching is solved while the shunt time-sharing metering of the power supply electric quantity of each power supply is realized.
EXAMPLE III
Fig. 5 is a flowchart of a method for measuring electricity supplied by multiple power supplies according to a third embodiment of the present invention, where the method for measuring electricity is executable by the apparatus for measuring electricity according to any of the embodiments described above, and specifically includes the following steps:
step 110, receiving a trigger signal.
The triggering signal may include a first triggering signal and a second triggering signal, the first triggering signal and the second triggering signal may be generated by a first signal triggering unit and a second signal triggering unit in the electricity metering device, respectively, and a control unit in the electricity metering device may receive the first triggering signal and the second triggering signal through its own input end.
And step 120, controlling the electric quantity metering unit to perform shunt time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signal.
Specifically, when a first trigger signal is received, the electric quantity metering unit is controlled to meter the electric quantity of the first power supply, and the time for the electric quantity metering unit to meter the electric quantity of the first power supply is recorded; and when receiving a second trigger signal, controlling the electric quantity metering unit to meter the electric quantity of the second power supply, and recording the time for metering the electric quantity of the second power supply by the electric quantity metering unit so as to realize the shunt time-sharing metering of the power supply electric quantities of the first power supply and the second power supply.
Illustratively, after receiving the trigger signal, when at least two state transitions exist between the first trigger signal and the second trigger signal received within a preset time period, such as 0.2s, determining that the line where the electricity metering device is located has a transient fault, and generating an alarm signal; when one state jump exists between the first trigger signal and the second trigger signal received within a preset time period, the first power supply and the second power supply are determined to be in a normal switching state, and a power supply normal switching signal is generated, so that corresponding prompt information is sent out through the alarm signal and the power supply normal switching signal.
In an implementation manner, fig. 6 is a flowchart of a fault determination method provided in the third embodiment of the present invention, which specifically includes the following steps:
the method comprises the following steps: a first trigger signal and a second trigger signal are received.
Step two: judging whether state jump exists between the first trigger signal and the second trigger signal; if yes, executing the third step and the fourth step, otherwise, ending.
Whether state transition exists in the received first trigger signal and the second trigger signal within a preset time period such as 0.2s can be judged.
Step three: and when at least two state jumps exist between the first trigger signal and the second trigger signal, determining that the line where the electric quantity metering device is located has an instantaneous fault, and generating an alarm signal.
Illustratively, if there are at least two state transitions, such as "0-1-0" state transitions, between the first trigger signal and the second trigger signal within a predetermined time period, then a transient fault is determined on the line on which the fuel-gauge device is located, and an alarm signal is generated.
Step four: and when one state jump exists between the first trigger signal and the second trigger signal, determining that the first power supply and the second power supply are in a normal switching state, and generating a power supply normal switching signal.
Illustratively, if a state transition, such as "0-1-1", exists between the first trigger signal and the second trigger signal within a preset time period, it is determined that the first power supply and the second power supply are in a normal switching state, and a power supply normal switching signal is generated.
It should be noted that the preset time period may be specifically determined according to actual situations, and is not limited herein.
The electric quantity metering method with multiple power supplies provided by the embodiment has the corresponding beneficial effects of the electric quantity metering device with multiple power supplies.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A multi-power-supply electricity metering device, comprising: the system comprises at least two signal trigger units and at least one electric energy meter, wherein the at least two signal trigger units are electrically connected with the at least one electric energy meter;
the at least two signal trigger units comprise a first signal trigger unit and a second signal trigger unit, the electric energy meter and the first signal trigger unit are electrically connected with the output end of a first power supply, and the electric energy meter and the second signal trigger unit are electrically connected with the output end of a second power supply; the first signal trigger unit and the second signal trigger unit are both electrically connected with the electric energy meter; the first power supply and the second power supply are used for supplying power to the electric energy meter in a time-sharing manner;
the first signal trigger unit is used for generating a first trigger signal when the first power supply supplies power and sending the first trigger signal to the electric energy meter; the second signal trigger unit is used for generating a second trigger signal when the second power supply supplies power and sending the second trigger signal to the electric energy meter;
the electric energy meter comprises a control unit and an electric quantity metering unit, the control unit is electrically connected with the electric quantity metering unit and is used for receiving a trigger signal, the trigger signal comprises a first trigger signal and a second trigger signal and controlling the electric quantity metering unit to conduct shunting time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signal.
2. The electricity metering device of claim 1, wherein the control unit is configured to control the electricity metering unit to meter the electricity of the first power supply and record a time when the electricity metering unit meters the electricity of the first power supply when receiving the first trigger signal; the control unit is used for controlling the electric quantity metering unit to meter the electric quantity of the second power supply and recording the time for the electric quantity metering unit to meter the electric quantity of the second power supply when receiving the second trigger signal.
3. The electricity metering device of claim 1, wherein the control unit is further configured to determine that a transient fault occurs in a line on which the electricity metering device is located and generate an alarm signal when at least two state transitions exist between the first trigger signal and the second trigger signal received within a preset time period; the control unit is further configured to determine that the first power supply and the second power supply are in a normal switching state when a state transition exists between the first trigger signal and the second trigger signal received within a preset time period, and generate a power supply normal switching signal.
4. The electricity metering device of claim 3, wherein the control unit is in communication connection with a master station, and the control unit is further configured to send the alarm signal and the normal power switching signal, and the electricity metered by the electricity metering unit to the master station.
5. The electricity metering device of claim 1, wherein the electric energy meter further comprises a verification pulse unit electrically connected to the control unit for verifying the trigger signal received by the control unit.
6. The electric quantity metering device of claim 1, wherein the electric energy meter further comprises a liquid crystal display screen electrically connected with the control unit, the control unit is configured to receive the electric quantity metered by the electric quantity metering unit and send the received electric quantity to the liquid crystal display screen, and the liquid crystal display screen is configured to display the electric quantity sent by the control unit.
7. The electricity metering device of claim 1, wherein the output terminal of the first power supply and the output terminal of the second power supply are both electrically connected to the electricity metering unit through a transformer, and the first signal triggering unit and the second signal triggering unit are both electrically connected to the control unit; the power supply comprises a first power supply and a self output end, a second power supply and a self output end, wherein the first power supply and the self output end comprise a first change-over switch, the first signal trigger unit is used for detecting the state of the first change-over switch and generating a first trigger signal when detecting that the first change-over switch is closed, and the second signal trigger unit is used for detecting the state of the second change-over switch and generating a second trigger signal when detecting that the second change-over switch is closed.
8. A multi-power-supply electricity metering method, characterized in that the electricity metering method is performed by the electricity metering device of any one of claims 1 to 7, and comprises:
receiving a trigger signal, wherein the trigger signal comprises a first trigger signal and a second trigger signal;
and controlling an electric quantity metering unit to perform shunt time-sharing metering on the electric quantity of the first power supply and the electric quantity of the second power supply according to the received trigger signal.
9. The method of claim 8, wherein controlling the power metering unit to meter the power of the first power source and the power of the second power source in a split manner according to the received trigger signal comprises:
when the first trigger signal is received, controlling an electric quantity metering unit to meter the electric quantity of a first power supply, and recording the time for metering the electric quantity of the first power supply by the electric quantity metering unit;
and when the second trigger signal is received, controlling the electric quantity metering unit to meter the electric quantity of the second power supply, and recording the time for metering the electric quantity of the second power supply by the electric quantity metering unit.
10. The method of claim 8, wherein after receiving the trigger signal, further comprising:
when at least two state jumps exist between the first trigger signal and the second trigger signal received within a preset time period, determining that a line where the electric quantity metering device is located has an instantaneous fault, and generating an alarm signal;
when one state jump exists between the first trigger signal and the second trigger signal received within a preset time period, the first power supply and the second power supply are determined to be in a normal switching state, and a power supply normal switching signal is generated.
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