CN112269037A - Metering verification method for off-board charger - Google Patents
Metering verification method for off-board charger Download PDFInfo
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- CN112269037A CN112269037A CN202011053773.8A CN202011053773A CN112269037A CN 112269037 A CN112269037 A CN 112269037A CN 202011053773 A CN202011053773 A CN 202011053773A CN 112269037 A CN112269037 A CN 112269037A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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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
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses a metering calibration method for an off-board charger, and belongs to the technical field of metering calibration of off-board chargers. The metering point of the existing calibrator is not unified with the metering point of the direct current electric energy meter, so that the final calibration qualification rate is influenced. Through continuous exploration and test, the voltage sampling line connected in parallel with the voltage line at the position of the direct current electric energy meter in the non-vehicle-mounted charger is arranged in the gun head of the charging gun, so that the requirement that the actual metering point of the non-vehicle-mounted charger and the verification point of the on-site calibrator are completely consistent is met, the influence of voltage drop on the gun line in the past is avoided, and the metering point setting requirement is met better. The direct current electric energy meter is an integrated direct current electric energy meter, direct metering of direct current electric energy under direct current large current is achieved, precision influence caused by serious heating of a large current divider due to power effects of large current and large voltage in a verification process is avoided, metering accuracy is improved, and meanwhile sealing management is facilitated.
Description
Technical Field
The invention relates to a metering and calibrating method for an off-board charger, and belongs to the technical field of metering and calibrating of the off-board charger.
Background
At present, the off-board charger in the market mainly uses a built-in electric energy meter as an electric energy metering device, wherein the metering and charging of the off-board charger are based on the combined metering data of an indirect direct current electric energy meter and a corresponding shunt inside the off-board charger. The direct current electric energy meter converts direct current into corresponding small voltage signals through the shunt for electric energy metering calculation, and voltage samples are arranged on two sides of a live wire and a zero line in the off-board charger.
However, when the forced detection is performed, the field calibrator is limited by the existing structural design, the calibration and the measurement can only be performed at the gun head of the charging gun, so that the measurement point of the calibrator and the measurement point of the direct current electric energy meter are not uniform, and the measurement point of the electric energy meter and the measurement point of the gun head of the charging gun have physical phenomena such as large cable voltage drop of the charging gun, contact resistance at a connection position, cable resistance change during long-time charging and the like. The calibration result of the on-site calibrator is inaccurate, large errors exist, and the final calibration qualified rate is influenced.
Further, the requirements for the seal of the off-board charger in the existing verification regulations are difficult to execute. The electric energy meter or the metering module used in the off-board charger is required to be sealed in the verification procedure. The metering accuracy of the whole pile can be affected after the metering accessories and other main components of the charging equipment such as the shunt and the like are replaced or maintained, and the metering result cannot be ensured not to be manually changed in a verification period only by sealing the electric energy meter. However, if the whole charging equipment is sealed, the seal needs to be authorized to be opened and confirmed again each time during field operation upgrading and maintenance and repair work of the charging equipment, so that the demand of the implementing personnel is large, the workload of measuring and confirming the seal again is large, and the working efficiency is seriously influenced; meanwhile, in the verification process, due to the power effect of large current and large voltage, the large current divider is heated seriously, and the accuracy of the current divider and the accuracy of the electric energy meter are influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for setting a voltage sampling line connected in parallel with a voltage line at a direct current electric energy meter in a non-vehicle charger in a gun head of the charging gun, so that the requirement that the actual metering point of the non-vehicle charger and the verification point of a field calibrator are completely consistent is met, the influence of voltage drop on the gun line in the past is avoided, and the setting requirement of the metering point is better met; meanwhile, the direct current electric energy meter is an integrated direct current electric energy meter, a built-in current sensor replaces an original external discrete shunt to carry out current sampling, and the metering functions of the original discrete indirect direct current electric energy meter and the shunt are integrated into a whole, so that the precision influence caused by serious heating of the large current shunt due to the power effect of large current and large voltage in the verification process is avoided; and meanwhile, the metering verification method of the off-board charger is convenient for seal management.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a metering and calibrating method for an off-board charger comprises the following steps:
firstly, setting a voltage sampling line connected in parallel with a voltage line at a direct current electric energy meter in a non-vehicle charger;
secondly, the voltage sampling line is a high-voltage low-resistance temperature-resistant cable, and one end of the voltage sampling line is assembled in a gun head of the charging gun;
thirdly, connecting the field calibrator with the voltage sampling line at the gun head to perform calibration and measurement;
through continuous exploration and test, the voltage sampling line connected in parallel with the voltage line at the position of the direct current electric energy meter in the non-vehicle-mounted charger is arranged in the gun head of the charging gun, so that the requirement that the actual metering point of the non-vehicle-mounted charger and the verification point of the on-site calibrator are completely consistent is met, the influence of voltage drop on the gun line in the past is avoided, and the metering point setting requirement is met better.
The direct current electric energy meter is an integrated direct current electric energy meter, the built-in current sensor replaces an original external discrete shunt to carry out current sampling, the metering functions of the original discrete indirect direct current electric energy meter and the original discrete shunt are integrated into a whole, direct metering of direct current electric energy under direct current large current is realized, the precision influence caused by serious heating of the large current shunt due to the power effect of the large current and the large voltage in the verification process is avoided, the metering accuracy is improved, and meanwhile, sealing management is facilitated.
As a preferable technical measure:
the detection point calculates a basic error by adopting a standard high-frequency pulse number presetting method, and the method specifically comprises the following steps:
firstly, a field calibrator and a detected charger work simultaneously under the same load during detection, the field calibrator adopts a virtual load detection method to carry out detection, namely the field calibrator (a virtual load source) outputs test voltage and test current to a direct current electric energy meter (an integrated built-in electric energy meter) in the off-board charger in real time to enable the detected direct current electric energy meter to rotate;
step two, the field check meter pre-divides the frequency of the reference frequency through a programmable pulse output module, converts the set power value into a standard high-frequency pulse number m and outputs the standard high-frequency pulse number m, meanwhile, the device receives N low-frequency pulses input by the detected direct current electric energy meter, the detected direct current electric energy meter low-frequency pulses and the standard high-frequency pulses are transmitted to an error calculation module, the m is used as the actually-measured high-frequency pulse number, and then the m and the m which is the pulse number m pre-calculated by the device are transmitted to0And comparing to obtain the relative error gamma (%) of the measured direct current electric energy meter.
As a preferable technical measure:
the calculation formula of the relative error of the direct current electric energy meter to be measured is as follows:
in the formula: cH0A standard electric energy meter, namely an on-site calibrator, is preset with a high-frequency pulse constant, imp/kWh;
CL-the low frequency pulse constant, imp/kWh, of the dc power meter being tested;
u, I: the standard source sets full-scale values of output voltage and current during detection.
As can be seen from the formula (3), the determining factor directly influencing the magnitude of the error value of the detected charger is the error between the voltage U and the current I applied by the on-site calibration instrument and the voltage U and the current I fed back by the detected charger. The larger the error between the magnitude of the display voltage and the current on the detected charger and the true value is, the larger the error value of the overall detection is. This requires that, in the whole verification process, the meaningless loss of the voltage and current in the intermediate transmission process must be reduced, so as to avoid the large deviation of the verification result and the low overall verification benefit.
As a preferable technical measure:
the gun head calibration process error calculation formula of the charging gun is as follows:
U＝U1+U1÷Ru*R1………………………………………………(4)
error in voltage
Wherein:
u, I is a detection voltage current value of a gun head verification point of the off-board charger 1;
ru and R1 are resistance values of voltage sampling internal resistance and voltage sampling connection of the built-in electric energy meter in the verification process;
u1 is the voltage value of the on-board charger electric energy meter sampling.
From equation (5), it can be seen that: the smaller the resistance value of the voltage sampling line resistor R1, the lower the sensitivity of the voltage sampling line to temperature and the higher the voltage resistance, the lower the error of voltage detection, and the influence of the error factor can be basically eliminated.
As a preferable technical measure:
the virtual load detection method specifically comprises the following steps:
firstly, assembling a verification gun seat connected with internal voltage and current lines of a direct current electric energy meter in a non-vehicle charger;
the circuit of the calibration gun seat and the internal circuit of the direct current electric energy meter form a power supply loop;
secondly, carrying out verification by a virtual load method;
the method specifically comprises the following steps:
turning off the off-board charger; inserting a test power source into the verification gun base from the outside of the off-board charger, wherein a connector of the test power source is connected with an auxiliary power supply terminal of a verification gun base panel; the test power source supplies power to voltage and current lines of a direct current electric energy meter in the off-board charger through the verification gun seat to form a current loop; forming virtual load verification conditions; and the virtual load verification without pile opening is realized.
As a preferable technical measure:
the circuit of examination gun seat is connected with the internal circuit of direct current electric energy meter:
respectively connecting a pin A + and a pin A-of the calibration gun seat with a positive voltage end and a negative voltage end of a direct current electric energy meter;
and a pin DC + and a pin DC-of the calibration gun seat are respectively connected with a current positive end and a current negative end of the direct current electric energy meter.
As a preferable technical measure:
pins of a positive end and a negative end of an auxiliary power supply on a panel of the verification gun base are respectively connected with a positive end and a negative end of the auxiliary power supply of the direct current electric energy meter;
the pin S + and the pin S-of the verification gun seat are respectively connected with an RS485A end and an RS485B end in the direct current electric energy meter;
the pin CC1 and the pin CC2 of the verification gun seat are respectively connected with the positive end and the negative end of the pulse output of the direct current electric energy meter,
and a pin PE of the verification gun seat is connected with a ground wire of the non-vehicle-mounted charger.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through continuous exploration and test, the voltage sampling line which is randomly set in the past of the non-vehicle-mounted charger is removed, and the special voltage sampling line is connected in parallel with the cable in the gun head and is used for voltage sampling connection of the direct current electric energy meter or the direct current electric energy meter in the non-vehicle-mounted charger, so that the requirement that the actual metering point of the non-vehicle-mounted charger or the direct current non-vehicle-mounted charger and the verification point of the on-site verification instrument are completely consistent is met, the influence of voltage drop on the gun line in the past is avoided, the metering point setting requirement is better met, and the source of additional verification errors is greatly reduced.
The invention innovatively adopts the integrated direct current electric energy meter in the off-board charger to replace a combined metering scheme of the direct current electric energy meter and the shunt, thereby avoiding the precision influence caused by serious heating of the large current shunt due to the power effect of large current and large voltage in the verification process.
The integrated direct current electric energy meter carries out current sampling by replacing the original external discrete shunt with the built-in current sensor, integrates the metering functions of the original discrete indirect direct current electric energy meter and the shunt into a whole, avoids power loss on a line, and realizes direct metering of direct current electric energy under direct current heavy current.
The integrated design structure for metering the electric energy meter is convenient for seal management of a metering device arranged in the charger, meets the seal management requirements of verification regulations on the electric energy meter or a metering module, and solves the problem that the seal requirements of the original metering scheme are difficult to execute.
Drawings
FIG. 1 is a schematic diagram of the circuit connection of the present invention;
fig. 2 is a schematic diagram of a calibration process of the lance tip according to the present invention.
Description of reference numerals:
1. a non-vehicle-mounted charger; 2. a gun head; 3. a voltage sampling line; 4. an integrated direct current electric energy meter; 5. a current sensor; 6. an on-site calibrator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
As shown in fig. 1, a metrological verification method for an off-board charger includes the following steps:
firstly, a voltage sampling line 3 connected in parallel with a voltage line at a direct current electric energy meter in the non-vehicle-mounted charger 1 is arranged,
secondly, the voltage sampling line is a high-voltage low-resistance temperature-resistant cable, and one end of the voltage sampling line is assembled in a gun head 2 of the charging gun;
thirdly, the site calibrator 6 is connected with the voltage sampling line at the gun head for calibration and measurement;
through continuous exploration and test, the voltage sampling line connected in parallel with the voltage line at the position of the direct current electric energy meter in the non-vehicle-mounted charger is arranged in the gun head of the charging gun, so that the requirement that the actual metering point of the non-vehicle-mounted charger and the verification point of the on-site calibrator are completely consistent is met, the influence of voltage drop on the gun line in the past is avoided, and the metering point setting requirement is met better.
The direct current electric energy meter is an integrated direct current electric energy meter 4, the built-in current sensor replaces 5 to replace an original external discrete shunt to carry out current sampling, the metering functions of the original discrete indirect direct current electric energy meter and the shunt are integrated into a whole, direct metering of direct current electric energy under direct current large current is realized, the precision influence caused by serious heating of the large current shunt due to the power effect of the large current and the large voltage in the verification process is avoided, the metering precision is improved, and meanwhile, the seal management is facilitated.
One specific embodiment of the invention for calculating the basic error:
the detection point calculates a basic error by adopting a standard high-frequency pulse number presetting method, and the method specifically comprises the following steps:
firstly, a field calibrator and a detected charger work simultaneously under the same load during detection, the field calibrator adopts a virtual load detection method to carry out detection, namely the field calibrator (a virtual load source) outputs test voltage and test current to a direct current electric energy meter (an integrated built-in electric energy meter) in the off-board charger in real time to enable the detected direct current electric energy meter to rotate;
step two, the field check meter pre-divides the frequency of the reference frequency through a programmable pulse output module, converts the set power value into a standard high-frequency pulse number m and outputs the standard high-frequency pulse number m, meanwhile, the device receives N low-frequency pulses input by the detected direct current electric energy meter, the detected direct current electric energy meter low-frequency pulses and the standard high-frequency pulses are transmitted to an error calculation module, the m is used as the actually-measured high-frequency pulse number, and then the m and the m which is the pulse number m pre-calculated by the device are transmitted to0And comparing to obtain the relative error gamma (%) of the measured direct current electric energy meter.
One specific embodiment of the invention for calculating the relative error:
the calculation formula of the relative error of the direct current electric energy meter to be measured is as follows:
in the formula: cH0The on-site calibration instrument presets a high-frequency pulse constant, imp/kWh;
CL-the low frequency pulse constant, imp/kWh, of the dc power meter being tested;
u, I: the standard source sets full-scale values of output voltage and current during detection.
As can be seen from the formula (3), the determining factor directly influencing the magnitude of the error value of the detected charger is the error between the voltage U and the current I applied by the on-site calibration instrument and the voltage U and the current I fed back by the detected charger. The larger the error between the magnitude of the display voltage and the current on the detected charger and the true value is, the larger the error value of the overall detection is. This requires that, in the whole verification process, the meaningless loss of the voltage and current in the intermediate transmission process must be reduced, so as to avoid the large deviation of the verification result and the low overall verification benefit.
As shown in FIG. 2, one embodiment of the present invention calculates the process error:
the gun head calibration process error calculation formula of the charging gun is as follows:
U＝U1+U1÷Ru*R1………………………………………………(4)
error in voltage
Wherein: u, I is a detection voltage current value of a gun head verification point of the off-board charger 1;
ru and R1 are resistance values of voltage sampling internal resistance and voltage sampling connection of the built-in electric energy meter in the verification process;
u1 is the voltage value of the on-board charger electric energy meter sampling.
The standard voltage and current values output by the on-site calibration instrument are Uo and Io; the internal resistance of the built-in electric energy meter is Ri in the verification process, and the resistance value of the large-current wiring is R2; the load side is RL.
From equation (5), it can be seen that: the smaller the resistance value of the voltage sampling line resistor R1, the lower the sensitivity of the voltage sampling line to temperature and the higher the voltage resistance, the lower the error of voltage detection, and the influence of the error factor can be basically eliminated.
The invention discloses a specific embodiment of a virtual load detection method, which comprises the following steps:
the virtual load detection method specifically comprises the following steps:
firstly, assembling a verification gun seat connected with internal voltage and current lines of a direct current electric energy meter in a non-vehicle charger;
the circuit of the calibration gun seat and the internal circuit of the direct current electric energy meter form a power supply loop;
secondly, carrying out verification by a virtual load method;
the method specifically comprises the following steps:
turning off the off-board charger; inserting a test power source into the verification gun base from the outside of the off-board charger, wherein a connector of the test power source is connected with an auxiliary power supply terminal of a verification gun base panel; the test power source supplies power to voltage and current lines of a direct current electric energy meter in the off-board charger through the verification gun seat to form a current loop; forming virtual load verification conditions; and the virtual load verification without pile opening is realized.
The invention relates to a specific embodiment of line connection, which comprises the following steps:
the circuit of examination gun seat is connected with the internal circuit of direct current electric energy meter:
respectively connecting a pin A + and a pin A-of the calibration gun seat with a positive voltage end and a negative voltage end of a direct current electric energy meter;
and a pin DC + and a pin DC-of the calibration gun seat are respectively connected with a current positive end and a current negative end of the direct current electric energy meter.
Pins of a positive end and a negative end of an auxiliary power supply on a panel of the verification gun base are respectively connected with a positive end and a negative end of the auxiliary power supply of the direct current electric energy meter;
the pin S + and the pin S-of the verification gun seat are respectively connected with an RS485A end and an RS485B end in the direct current electric energy meter;
the pin CC1 and the pin CC2 of the verification gun seat are respectively connected with the positive end and the negative end of the pulse output of the direct current electric energy meter,
and a pin PE of the verification gun seat is connected with a ground wire of the non-vehicle-mounted charger.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A metering and calibrating method for an off-board charger is characterized in that,
the method comprises the following steps:
firstly, setting a voltage sampling line connected in parallel with a voltage line at a direct current electric energy meter in a non-vehicle charger;
secondly, the voltage sampling line is a high-voltage low-resistance temperature-resistant cable, and one end of the voltage sampling line is assembled in a gun head of the charging gun;
thirdly, connecting the field calibrator with the voltage sampling line at the gun head to perform calibration and measurement;
the requirement that the actual metering point of the off-board charger and the verification point of the on-site calibrator are completely consistent is met;
the direct current electric energy meter is an integrated direct current electric energy meter, and the direct current electric energy meter realizes direct metering of direct current electric energy under direct current heavy current by sampling current through the built-in current sensor.
2. The metrological verification method of an off-board charger according to claim 1,
the detection point calculates a basic error by adopting a standard high-frequency pulse number presetting method, and the method specifically comprises the following steps:
firstly, a field calibrator and a detected charger work simultaneously under the same load during detection, the field calibrator is verified by adopting a virtual load verification method, namely the field calibrator outputs test voltage and test current to a direct current electric energy meter in the off-board charger in real time to enable the detected direct current electric energy meter to rotate;
step two, the on-site calibrator pre-divides the reference frequency through the programmable pulse output module and converts the set power value intoThe pulse number is converted into a standard high-frequency pulse number m to be output, the device receives N low-frequency pulses input by the detected direct current electric energy meter, the low-frequency pulses and the standard high-frequency pulses of the detected direct current electric energy meter are transmitted to an error calculation module, the m is used as an actually measured high-frequency pulse number, and the actually measured high-frequency pulse number is compared with the pulse number m pre-calculated by the device0And comparing to obtain the relative error gamma (%) of the measured direct current electric energy meter.
3. The metrological verification method of an off-board charger according to claim 2, characterized in that,
the calculation formula of the relative error of the direct current electric energy meter to be measured is as follows:
in the formula: cH0The on-site calibration instrument presets a high-frequency pulse constant, imp/kWh;
CL-the low frequency pulse constant, imp/kWh, of the dc power meter being tested;
u, I: the standard source sets full-scale values of output voltage and current during detection.
4. The metrological verification method of an off-board charger according to claim 3, characterized in that,
the gun head calibration process error calculation formula of the charging gun is as follows:
U＝U1+U1÷Ru*R1……………(4)
error in voltage
Wherein:
u, I is a voltage current value detected by a detection point of a gun head of the off-board charger;
ru and R1 are resistance values of voltage sampling internal resistance and voltage sampling connection of the built-in electric energy meter in the verification process;
u1 is the voltage value of the on-board charger electric energy meter sampling.
5. The metrological verification method of an off-board charger according to claim 4, characterized in that,
the virtual load detection method specifically comprises the following steps:
firstly, assembling a verification gun seat connected with internal voltage and current lines of a direct current electric energy meter in a non-vehicle charger;
the circuit of the calibration gun seat and the internal circuit of the direct current electric energy meter form a power supply loop;
secondly, carrying out verification by a virtual load method;
the method specifically comprises the following steps:
turning off the off-board charger; inserting a test power source into the verification gun base from the outside of the off-board charger, wherein a connector of the test power source is connected with an auxiliary power supply terminal of a verification gun base panel; the test power source supplies power to voltage and current lines of a direct current electric energy meter in the off-board charger through the verification gun seat to form a current loop; forming virtual load verification conditions; and the virtual load verification without pile opening is realized.
6. The metrological verification method of an off-board charger according to claim 5,
the circuit of examination gun seat is connected with the internal circuit of direct current electric energy meter:
respectively connecting a pin A + and a pin A-of the calibration gun seat with a positive voltage end and a negative voltage end of a direct current electric energy meter;
and a pin DC + and a pin DC-of the calibration gun seat are respectively connected with a current positive end and a current negative end of the direct current electric energy meter.
7. The metrological verification method of an off-board charger according to claim 6,
pins of a positive end and a negative end of an auxiliary power supply on a panel of the verification gun base are respectively connected with a positive end and a negative end of the auxiliary power supply of the direct current electric energy meter;
the pin S + and the pin S-of the verification gun seat are respectively connected with an RS485A end and an RS485B end in the direct current electric energy meter;
the pin CC1 and the pin CC2 of the verification gun seat are respectively connected with the positive end and the negative end of the pulse output of the direct current electric energy meter,
and a pin PE of the verification gun seat is connected with a ground wire of the non-vehicle-mounted charger.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137297A (en) * | 2021-11-29 | 2022-03-04 | 国网北京市电力公司 | Signal processing device |
| CN115856400A (en) * | 2023-02-17 | 2023-03-28 | 中电装备山东电子有限公司 | Current sampling circuit and electric energy meter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288817A (en) * | 2011-05-10 | 2011-12-21 | 深圳市科陆电子科技股份有限公司 | Charging pile power consumption detection system based on virtual load testing and detection method |
| CN202353239U (en) * | 2011-10-21 | 2012-07-25 | 深圳市科陆电子科技股份有限公司 | Converter adopting virtual load to provide charging interfaces for charging pole |
| CN104215931A (en) * | 2014-10-10 | 2014-12-17 | 国家电网公司 | Automatic electric energy meter calibrating device period investigation method |
| CN104808169A (en) * | 2015-04-23 | 2015-07-29 | 国家电网公司 | Three-phase electric energy meter field detection device and detection method |
| CN105607031A (en) * | 2016-03-23 | 2016-05-25 | 国网四川省电力公司电力科学研究院 | High-voltage electric energy meter calibrating device |
| CN105699816A (en) * | 2016-03-08 | 2016-06-22 | 北京群菱能源科技有限公司 | AC charging post calibration device |
| CN110171319A (en) * | 2019-06-03 | 2019-08-27 | 国网四川省电力公司电力科学研究院 | A kind of three-phase standard AC charging pile that can be used for tracing to the source |
-
2020
- 2020-09-29 CN CN202011053773.8A patent/CN112269037A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN202353239U (en) * | 2011-10-21 | 2012-07-25 | 深圳市科陆电子科技股份有限公司 | Converter adopting virtual load to provide charging interfaces for charging pole |
| CN104215931A (en) * | 2014-10-10 | 2014-12-17 | 国家电网公司 | Automatic electric energy meter calibrating device period investigation method |
| CN104808169A (en) * | 2015-04-23 | 2015-07-29 | 国家电网公司 | Three-phase electric energy meter field detection device and detection method |
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| CN105607031A (en) * | 2016-03-23 | 2016-05-25 | 国网四川省电力公司电力科学研究院 | High-voltage electric energy meter calibrating device |
| CN110171319A (en) * | 2019-06-03 | 2019-08-27 | 国网四川省电力公司电力科学研究院 | A kind of three-phase standard AC charging pile that can be used for tracing to the source |
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