CN114217259A - Test method for inserting direct-current even harmonic equipment into alternating-current electric energy meter calibration device - Google Patents
Test method for inserting direct-current even harmonic equipment into alternating-current electric energy meter calibration device Download PDFInfo
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Abstract
The invention discloses a method for testing a device wedged into direct current even harmonic equipment of an alternating current electric energy meter calibration device, which is used for conventional function detection and direct current even harmonic detection of the alternating current electric energy meter and comprises the following steps of S1: and performing conventional function detection on each alternating current electric energy meter positioned on the electric energy meter calibration stand through the conventional function detection state circuit of the alternating current electric energy meter, and performing step S2: and D, performing D.C. even harmonic detection on each A.C. electric energy meter positioned on the electric energy meter calibration stand through the D.C. even harmonic detection state circuit of the A.C. electric energy meter. The invention discloses a testing method for inserting a direct-current even harmonic device into an alternating-current electric energy meter calibration device, which is used for solving the problems of complex detection operation and low testing efficiency of a manual tool and solving the problem of risk of judging errors.
Description
Technical Field
The invention belongs to the technical field of electric energy meter detection, and particularly relates to a method for testing a device for checking an alternating current electric energy meter inserted into direct current even harmonic equipment.
Background
Electric power, one of the most important energy sources in the 21 st century, is becoming an increasingly indispensable part of our daily lives. Meanwhile, with the continuous progress and development of economy and the continuous improvement of the living standard of people, the consumption of people on electric power is gradually increased. In order to effectively save and reasonably manage electricity, most of old mechanical electric meters have been basically replaced in China in recent years, and intelligent electric energy meters with more accurate measurement and more convenient management are adopted. All intelligent electric energy meters need a series of detection before leaving a factory, in the detection of the intelligent electric energy meters, a direct current even harmonic wave test is a very important ring, and within a specified value, whether the accuracy of the electric energy meters is qualified or not under the influence of the direct current even harmonic wave is determined. The intelligent electric energy meter is connected into the direct current even harmonic equipment by manual wiring of a tester in the test process, only one intelligent electric energy meter can be generally detected by wiring at each time, the tester is required to manually judge whether the direct current even harmonic meets the requirements one by one through meter reading software in the test process of the test tool, the tester judges whether the direct current even harmonic test is qualified according to the test result of the test software after the test is finished, and the connecting wire is required to be detached after the test is finished. The labor intensity of the tester is high, the tester is easy to be tired, potential safety hazards of power utilization exist, and the detection efficiency is very low.
Therefore, the above problems are further improved.
Disclosure of Invention
The invention mainly aims to provide a testing method for inserting a direct-current even harmonic device into an alternating-current electric energy meter calibration device, which is used for solving the problems of complex detection operation and low testing efficiency of a manual tool and solving the problem of risk of judging errors.
The invention also aims to provide a test method for inserting the alternating current electric energy meter calibration device into the direct current even harmonic equipment, which can be used for carrying out conventional function detection on the alternating current electric energy meter and carrying out direct current even harmonic detection on the alternating current electric energy meter, and only needs to carry out power-on and power-off switching through a serial port control box, so that the detection efficiency is improved.
In order to achieve the above object, the present invention provides a method for testing a device for verifying an ac electric energy meter inserted into a dc even harmonic device, which is used for conventional function detection and dc even harmonic detection of the ac electric energy meter, and comprises the following steps:
step S1: the method comprises the steps that the conventional function detection state circuit of the alternating current electric energy meter is used for performing conventional function detection on each alternating current electric energy meter positioned on an electric energy meter calibration stand, and a monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the conventional function detection in real time so as to judge whether the conventional function of the electric energy meter is qualified or not;
step S2: after a serial port control box of the direct current even harmonic equipment receives a switching instruction for starting to execute direct current even harmonic detection, the serial port control box outputs direct current voltage (supplies power to the coil of the relay K1-K6), converts the conventional function detection state circuit of the alternating current electric energy meter into a direct current even harmonic detection state circuit of the alternating current electric energy meter, the DC even harmonic detection state circuit of the AC electric energy meter is used for carrying out DC even harmonic detection on each AC electric energy meter positioned on the electric energy meter calibration stand, and the monitoring device electrically connected with each alternating current energy meter monitors the detection state of the alternating current energy meter in the direct current even harmonic detection in real time so as to judge whether the direct current even harmonic of the energy meter is qualified or not (the direct current even harmonic is the detection of the precision, the initial inherent error of the alternating current energy meter is within the specified value, and the precision of the energy meter is qualified or not under the influence of the direct current even harmonic).
As a further preferable embodiment of the above technical means, step S1 is specifically implemented as the following steps:
step S1.1: the high-end current output of the program-controlled power source outputs sine wave alternating current, the sine wave alternating current is input into a first connecting terminal of the direct current even harmonic equipment through a standard meter, and then the sine wave alternating current is output from a third connecting terminal through a normally closed contact of a relay K1;
step S1.2: the alternating current output from the third connecting terminal sequentially passes through the alternating current electric energy meters (connected in series from the first epitope to the last epitope) which are sequentially connected in series and are positioned in the first row of the electric energy meter calibration stand, and the alternating current is input into a fourth connecting terminal of the direct current even harmonic equipment;
step S1.3: the alternating current input from the fourth connecting terminal passes through the normally closed contact of the relay K5 and then is output from the fifth connecting terminal, the alternating current output from the fifth connecting terminal sequentially passes through the alternating current electric energy meters (serially connected from the first epitope to the last epitope) which are sequentially connected in series and are positioned in the second row of the electric energy meter calibration stand, and the alternating current is input to the current input low end of the program-controlled power source to form a conventional function detection loop;
step S1.4: the monitoring device electrically connected with each alternating current energy meter monitors the detection state of the alternating current energy meter in the conventional function detection loop in real time to judge whether the conventional function of the energy meter is qualified or not, so that qualified information or fault information is formed.
As a further preferable embodiment of the above technical means, step S2 is specifically implemented as the following steps:
step S2.1: the high-end output sine wave alternating current of the current output of the program-controlled power source is input into a first connecting terminal of the direct current even harmonic equipment through a standard meter, and then is transmitted to a rectifier bridge consisting of a diode D1 and a diode D2 for rectification through a closed contact converted from a normally open contact of a relay K2 so as to output direct current;
step S2.2: the positive half-wave pulsating direct current output by the diode D1 is used for carrying out direct current even harmonic detection on each alternating current electric energy meter which is positioned in the first row of the electric energy meter calibration stand and is connected in series in sequence;
step S2.3: the negative half-wave pulsating direct current output by the diode D2 is used as a balance load for each alternating current electric energy meter which is positioned in the second row of the electric energy meter calibration stand and is connected in series in sequence;
step S2.4: the monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the direct current even harmonic detection loop in real time so as to judge whether the direct current even harmonic output of the electric energy meter is qualified or not, and qualified information or fault information is formed;
step S2.5: after the direct current even harmonic detection is finished, after a serial port control box of the direct current even harmonic equipment receives a switching instruction for finishing the execution of the direct current even harmonic detection, the serial port control box turns off direct current voltage output (24V), and converts a direct current even harmonic detection state circuit of the alternating current electric energy meter into a conventional function detection state circuit of the alternating current electric energy meter (a corresponding relay K1-K6 is switched back to a conventional function detection state).
As a further preferred embodiment of the above technical solution, the step S2.2 is specifically implemented as the following steps:
step S2.2.1: the positive half-wave pulsating direct current output by the diode D1 passes through a closed contact converted from a normally open contact of the relay K3 and is output from a third connecting terminal;
step S2.2.2: the positive half-wave pulsating direct current output from the third connecting terminal sequentially passes through the alternating current electric energy meters (connected in series from the first epitope to the last epitope) which are positioned in the first row of the electric energy meter calibration stand and are connected in series in sequence, and the positive half-wave pulsating direct current is input into a fourth connecting terminal of the direct current even harmonic equipment;
step S2.2.3: the positive half-wave pulsating direct current input from the fourth connecting terminal passes through a closed contact converted from a normally open contact of the relay K6 and is output to the low end of the current input of the programmable power source, so that a direct current even harmonic detection loop is formed.
As a further preferred embodiment of the above technical solution, step S2.3 is specifically implemented as the following steps:
step S2.3.1: the negative half-wave pulsating direct current output by the diode D2 passes through a closed contact converted from a normally open contact of the relay K4 and is output from a fifth connecting terminal;
step S2.3.2: the negative half-wave pulsating direct current output from the fifth connecting terminal sequentially passes through the alternating current electric energy meters (connected in series from the first epitope to the last epitope) which are sequentially connected in series and are positioned in the second row of the electric energy meter calibration stand, and the negative half-wave pulsating direct current is output to the current input low end of the program-controlled power source, so that a direct current even-order harmonic detection balanced load loop is formed.
As a further preferable technical solution of the above technical solution, in the normal function detection state circuit of the ac electric energy meter, the contact of the relay K1 is closed, the contact of the relay K2 is opened, the contact of the relay K3 is opened, the contact of the relay K4 is opened, the contact of the relay K5 is closed and the contact of the relay K6 is opened;
in the alternating current electric energy meter direct current even harmonic detection state circuit, the contact of the relay K1 is opened, the contact of the relay K2 is closed, the contact of the relay K3 is closed, the contact of the relay K4 is closed, the contact of the relay K5 is opened and the contact of the relay K6 is closed.
The invention has the beneficial effects that:
(1) the equipment can be directly accessed on the basis of not changing the original alternating current electric energy meter detection device;
(2) after the equipment is accessed, the testing function is intelligently controlled, and manual switching of a wiring mode is not needed;
(3) the device is suitable for most current electric energy meter calibration tables and assembly line electric energy meter calibration devices.
Drawings
FIG. 1 is a circuit diagram of a conventional function detection state of an AC electric energy meter according to a method for testing an AC electric energy meter calibration device inserted into a DC even harmonic device.
FIG. 2 is a circuit diagram of a DC even harmonic detection state of an AC electric energy meter according to a testing method of inserting a DC even harmonic device into an AC electric energy meter calibration apparatus of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
In the preferred embodiment of the present invention, those skilled in the art should note that the ac power meter and the programmed power source, etc. related to the present invention can be regarded as the prior art.
Preferred embodiments.
The invention discloses a method for testing a device wedged into direct current even harmonic equipment of an alternating current electric energy meter calibration device, which is used for conventional function detection and direct current even harmonic detection of the alternating current electric energy meter and comprises the following steps:
step S1: the method comprises the steps that the conventional function detection state circuit of the alternating current electric energy meter is used for performing conventional function detection on each alternating current electric energy meter positioned on an electric energy meter calibration stand, and a monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the conventional function detection in real time so as to judge whether the conventional function of the electric energy meter is qualified or not;
step S2: after a serial port control box of the direct current even harmonic equipment receives a switching instruction for starting to execute direct current even harmonic detection (master control computer software sends a direct current even harmonic test switching instruction to a serial port control I/0 box of the direct current even harmonic equipment through a 232 serial port), the serial port control box outputs direct current voltage (supplies power to a coil of a relay K1-K6), a conventional function detection state circuit of the alternating current electric energy meter is converted into a direct current even harmonic detection state circuit of the alternating current electric energy meter, the direct current even harmonic detection state circuit of the alternating current electric energy meter carries out direct current even harmonic detection on each alternating current electric energy meter positioned on an electric energy meter check table, a monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the direct current even harmonic detection in real time to judge whether the direct current even harmonic of the electric energy meter is qualified or not (the direct current even harmonic is detected for precision, and (3) whether the accuracy of the alternating current electric energy meter is qualified or not under the influence of direct current even harmonic within a specified value).
Specifically, step S1 is implemented as the following steps:
step S1.1: the high-end current output of the program-controlled power source outputs sine wave alternating current, the sine wave alternating current is input into a first connecting terminal of the direct current even harmonic equipment through a standard meter, and then the sine wave alternating current is output from a third connecting terminal through a normally closed contact of a relay K1;
step S1.2: the alternating current output from the third connecting terminal sequentially passes through the alternating current electric energy meters (connected in series from the first epitope to the last epitope) which are sequentially connected in series and are positioned in the first row of the electric energy meter calibration stand, and the alternating current is input into a fourth connecting terminal of the direct current even harmonic equipment;
step S1.3: the alternating current input from the fourth connecting terminal passes through the normally closed contact of the relay K5 and then is output from the fifth connecting terminal, the alternating current output from the fifth connecting terminal sequentially passes through the alternating current electric energy meters (serially connected from the first epitope to the last epitope) which are sequentially connected in series and are positioned in the second row of the electric energy meter calibration stand, and the alternating current is input to the current input low end of the program-controlled power source to form a conventional function detection loop;
step S1.4: the monitoring device electrically connected with each alternating current energy meter monitors the detection state of the alternating current energy meter in the conventional function detection loop in real time to judge whether the conventional function of the energy meter is qualified or not, so that qualified information or fault information is formed.
More specifically, step S2 is specifically implemented as the following steps:
step S2.1: the high-voltage direct current power supply comprises a programmable power source (a programmable power source of a cabinet of an electric energy meter checking device controlled by master control computer debugging software), a sine wave alternating current output at a high-end of the programmable power source, a first connecting terminal of direct current even harmonic equipment input through a standard meter, and a rectifier bridge consisting of a diode D1 and a diode D2 and rectifying the sine wave alternating current transmitted through a closed contact converted from a normally open contact of a relay K2 so as to output direct current;
step S2.2: the positive half-wave pulsating direct current output by the diode D1 is used for carrying out direct current even harmonic detection on each alternating current electric energy meter which is positioned in the first row of the electric energy meter calibration stand and is connected in series in sequence;
step S2.3: the negative half-wave pulsating direct current output by the diode D2 is used as a balance load for each alternating current electric energy meter which is positioned in the second row of the electric energy meter calibration stand and is connected in series in sequence;
step S2.4: the monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the direct current even harmonic detection loop in real time so as to judge whether the direct current even harmonic output of the electric energy meter is qualified or not, and qualified information or fault information is formed;
step S2.5: after the direct current even harmonic detection is finished, after a serial port control box of the direct current even harmonic equipment receives a switching instruction for finishing the execution of the direct current even harmonic detection, the serial port control box turns off direct current voltage output (24V), and converts a direct current even harmonic detection state circuit of the alternating current electric energy meter into a conventional function detection state circuit of the alternating current electric energy meter (a corresponding relay K1-K6 is switched back to a conventional function detection state).
Further, step S2.2 is embodied as the following steps:
step S2.2.1: the positive half-wave pulsating direct current output by the diode D1 passes through a closed contact converted from a normally open contact of the relay K3 and is output from a third connecting terminal;
step S2.2.2: the positive half-wave pulsating direct current output from the third connecting terminal sequentially passes through the alternating current electric energy meters (connected in series from the first epitope to the last epitope) which are positioned in the first row of the electric energy meter calibration stand and are connected in series in sequence, and the positive half-wave pulsating direct current is input into a fourth connecting terminal of the direct current even harmonic equipment;
step S2.2.3: the positive half-wave pulsating direct current input from the fourth connecting terminal passes through a closed contact converted from a normally open contact of the relay K6 and is output to the low end of the current input of the programmable power source, so that a direct current even harmonic detection loop is formed.
Further, step S2.3 is embodied as the following steps:
step S2.3.1: the negative half-wave pulsating direct current output by the diode D2 passes through a closed contact converted from a normally open contact of the relay K4 and is output from a fifth connecting terminal;
step S2.3.2: the negative half-wave pulsating direct current output from the fifth connecting terminal sequentially passes through the alternating current electric energy meters (connected in series from the first epitope to the last epitope) which are sequentially connected in series and are positioned in the second row of the electric energy meter calibration stand, and the negative half-wave pulsating direct current is output to the current input low end of the program-controlled power source, so that a direct current even-order harmonic detection balanced load loop is formed.
Preferably, in the normal function detection state circuit of the alternating current electric energy meter, the contact of the relay K1 is closed, the contact of the relay K2 is opened, the contact of the relay K3 is opened, the contact of the relay K4 is opened, the contact of the relay K5 is closed and the contact of the relay K6 is opened;
in the alternating current electric energy meter direct current even harmonic detection state circuit, the contact of the relay K1 is opened, the contact of the relay K2 is closed, the contact of the relay K3 is closed, the contact of the relay K4 is closed, the contact of the relay K5 is opened and the contact of the relay K6 is closed.
Preferably, routine function tests include start-up tests, shunt tests, and daily timing errors, among others.
Preferably, the function of each component is:
(1) a master control computer:
firstly, a communication line is used for connecting a calibration stand cabinet and direct current even harmonic equipment, electric energy meter calibration test software installed on a master control computer sends a command to control a power source of the calibration stand cabinet to output sine wave alternating current voltage and current which need to be loaded on an electric energy meter when a test experiment is carried out;
and controlling the direct current even harmonic equipment to work in a normal meter calibration state or a direct current even harmonic measurement test state through an internal switching circuit.
(2) Checking a cabinet: and receiving an instruction sent by the master control computer, and controlling the power source to output corresponding alternating-current sine wave voltage and current.
(3) Direct current even harmonic equipment: the master control computer works in a normal meter calibration state or a direct current even harmonic state by receiving an instruction sent by the master control computer and switching the connection mode between the wiring terminals through an internal circuit; and in a direct current even harmonic test state, sine wave alternating current input by the first wiring terminal is respectively output positive half-wave direct current and negative half-wave direct current from the third wiring terminal and the fifth wiring terminal through the internal rectifying module.
(4) Checking the alternating current electric energy meter: and placing the detected electric energy meter and measuring and testing the error of the electric energy meter.
Preferably, the principle of the invention is as follows:
(1) checking state of conventional functions of the electric energy meter (as shown in figure 1): the program-controlled power source of the electric energy meter checking device cabinet is controlled by master control computer debugging software, sine wave alternating current is output from the high-end output of power source current, the sine wave alternating current is input from a wiring terminal 1 (namely a first wiring terminal, the same below) of direct current even harmonic equipment through a standard meter, the sine wave alternating current is output from a wiring terminal 3 through a normally closed contact of a relay K1, the 1 epitope in a row on an alternating current electric energy meter checking rack is sequentially connected in series to the last epitope in the first row, the current is output to a wiring terminal 4 of the direct current even harmonic equipment, the sine wave alternating current is output from the wiring terminal 5 through the normally closed contact of the relay K5, and the sine wave alternating current returns to the low-end input of the power source current from the last epitope after the sequence connection of the second row of epitopes of the electric energy meter checking rack.
(2) Dc even harmonic test state (as in fig. 2): the master control computer software sends a direct current even harmonic test starting switching instruction to a serial port control I/0 box of the direct current even harmonic equipment through a 232 serial port, and the serial port control box outputs 24V voltage to supply power to a coil of a K1-K6 relay after receiving the instruction, so that the contact state of the K1-K6 relay enters a direct current even harmonic test state after being switched. After entering from direct current even harmonic equipment wiring terminal 1, the current is respectively rectified through rectifier bridges D1 and D2 in the direct current even harmonic equipment through a K2 relay.
The positive half-wave pulsating direct current output by the D1 is output to a first row of epitopes of the electric energy meter calibration console from the wiring terminal 3 through the K3 relay, then enters the wiring terminal 4, flows out to the low end of the power source current input from the wiring terminal 2 through the K6 relay, and forms a loop.
The negative half-wave pulsating direct current output by the D2 is output to the second row of epitopes of the electric energy meter calibration stand from the wiring terminal 5 through the K4 relay and flows out to the low end of the current input of the power source to form a loop.
After the direct current even harmonic test is finished, the main control software sends a command of switching back to a normal test state to the serial port control box, the serial port control box switches off the 24V direct current voltage output, and the corresponding relay K1-K6 switches back to a normal calibration table test state.
It should be noted that the technical features of the ac electric energy meter, the program-controlled power source, and the like related to the present patent application should be regarded as the prior art, and the specific structure, the operation principle, the control mode and the spatial arrangement mode of the technical features may be conventional in the art, and should not be regarded as the invention point of the present patent, and the present patent is not further specifically described in detail.
It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.
Claims (6)
1. A test method for inserting a direct current even harmonic device into an alternating current electric energy meter calibration device is used for conventional function detection and direct current even harmonic detection of the alternating current electric energy meter, and is characterized by comprising the following steps:
step S1: the method comprises the steps that the conventional function detection state circuit of the alternating current electric energy meter is used for performing conventional function detection on each alternating current electric energy meter positioned on an electric energy meter calibration stand, and a monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the conventional function detection in real time so as to judge whether the conventional function of the electric energy meter is qualified or not;
step S2: after a serial port control box of the direct current even harmonic equipment receives a switching instruction for starting to execute direct current even harmonic detection, the serial port control box outputs direct current voltage, a conventional function detection state circuit of the alternating current electric energy meter is converted into a direct current even harmonic detection state circuit of the alternating current electric energy meter, the direct current even harmonic detection state circuit of the alternating current electric energy meter is used for carrying out direct current even harmonic detection on each alternating current electric energy meter positioned on an electric energy meter calibration stand, and a monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the direct current even harmonic detection in real time so as to judge whether the direct current even harmonic of the electric energy meter is qualified or not.
2. The method for testing the device wedged into the direct current even harmonic equipment of the alternating current electric energy meter calibration device according to claim 1, wherein the step S1 is implemented by the following steps:
step S1.1: the high-end current output of the program-controlled power source outputs sine wave alternating current, the sine wave alternating current is input into a first connecting terminal of the direct current even harmonic equipment through a standard meter, and then the sine wave alternating current is output from a third connecting terminal through a normally closed contact of a relay K1;
step S1.2: alternating current output from the third connecting terminal sequentially passes through the alternating current electric energy meters which are positioned in the first row of the electric energy meter calibration stand and are sequentially connected in series, and the alternating current is input into a fourth connecting terminal of the direct current even harmonic equipment;
step S1.3: the alternating current input from the fourth connecting terminal passes through the normally closed contact of the relay K5 and then is output from the fifth connecting terminal, the alternating current output from the fifth connecting terminal sequentially passes through the alternating current electric energy meters which are positioned in the second row of the electric energy meter calibration stand and are sequentially connected in series, and the alternating current is input to the current input low end of the program-controlled power source to form a conventional function detection loop;
step S1.4: the monitoring device electrically connected with each alternating current energy meter monitors the detection state of the alternating current energy meter in the conventional function detection loop in real time to judge whether the conventional function of the energy meter is qualified or not, so that qualified information or fault information is formed.
3. The method for testing the device wedged into the direct current even harmonic equipment of the alternating current electric energy meter calibration device according to claim 2, wherein the step S2 is implemented by the following steps:
step S2.1: the high-end output sine wave alternating current of the current output of the program-controlled power source is input into a first connecting terminal of the direct current even harmonic equipment through a standard meter, and then is transmitted to a rectifier bridge consisting of a diode D1 and a diode D2 for rectification through a closed contact converted from a normally open contact of a relay K2 so as to output direct current;
step S2.2: the positive half-wave pulsating direct current output by the diode D1 is used for carrying out direct current even harmonic detection on each alternating current electric energy meter which is positioned in the first row of the electric energy meter calibration stand and is connected in series in sequence;
step S2.3: the negative half-wave pulsating direct current output by the diode D2 is used as a balance load for each alternating current electric energy meter which is positioned in the second row of the electric energy meter calibration stand and is connected in series in sequence;
step S2.4: the monitoring device electrically connected with each alternating current electric energy meter monitors the detection state of the alternating current electric energy meter in the direct current even harmonic detection loop in real time so as to judge whether the direct current even harmonic output of the electric energy meter is qualified or not, and qualified information or fault information is formed;
step S2.5: after the direct current even harmonic detection is finished, after a serial port control box of the direct current even harmonic equipment receives a switching instruction for finishing the execution of the direct current even harmonic detection, the serial port control box cuts off direct current voltage output, and a direct current even harmonic detection state circuit of the alternating current electric energy meter is converted into a conventional function detection state circuit of the alternating current electric energy meter.
4. The method for testing the device wedged into the direct current even harmonic equipment of the alternating current electric energy meter calibration device according to claim 3, wherein the step S2.2 is implemented by the following steps:
step S2.2.1: the positive half-wave pulsating direct current output by the diode D1 passes through a closed contact converted from a normally open contact of the relay K3 and is output from a third connecting terminal;
step S2.2.2: the positive half-wave pulsating direct current output from the third connecting terminal sequentially passes through the alternating current electric energy meters which are positioned in the first row of the electric energy meter calibration stand and are sequentially connected in series, and the positive half-wave pulsating direct current is input into a fourth connecting terminal of the direct current even harmonic equipment;
step S2.2.3: the positive half-wave pulsating direct current input from the fourth connecting terminal passes through a closed contact converted from a normally open contact of the relay K6 and is output to the low end of the current input of the programmable power source, so that a direct current even harmonic detection loop is formed.
5. The method for testing the device wedged into the direct current even harmonic equipment of the alternating current electric energy meter calibration device according to claim 4, wherein the step S2.3 is implemented by the following steps:
step S2.3.1: the negative half-wave pulsating direct current output by the diode D2 passes through a closed contact converted from a normally open contact of the relay K4 and is output from a fifth connecting terminal;
step S2.3.2: and the negative half-wave pulsating direct current output from the fifth connecting terminal sequentially passes through the alternating current electric energy meters which are positioned in the second row of the electric energy meter calibration stand and are sequentially connected in series, and the negative half-wave pulsating direct current is output to the current input low end of the program-controlled power source, so that a direct current even-order harmonic detection balanced load loop is formed.
6. The method for testing the wedging of the alternating current electric energy meter calibration device into the direct current even harmonic equipment is characterized in that in the alternating current electric energy meter normal function detection state circuit, the contact of the relay K1 is closed, the contact of the relay K2 is opened, the contact of the relay K3 is opened, the contact of the relay K4 is opened, the contact of the relay K5 is closed and the contact of the relay K6 is opened;
in the alternating current electric energy meter direct current even harmonic detection state circuit, the contact of the relay K1 is opened, the contact of the relay K2 is closed, the contact of the relay K3 is closed, the contact of the relay K4 is closed, the contact of the relay K5 is opened and the contact of the relay K6 is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111383295.1A CN114217259A (en) | 2021-11-22 | 2021-11-22 | Test method for inserting direct-current even harmonic equipment into alternating-current electric energy meter calibration device |
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| CN202111383295.1A CN114217259A (en) | 2021-11-22 | 2021-11-22 | Test method for inserting direct-current even harmonic equipment into alternating-current electric energy meter calibration device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156273A (en) * | 2011-04-20 | 2011-08-17 | 郑州万特电气有限公司 | Electric energy meter verification circuit for error test and direct current and even harmonic test |
| CN104698425A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | Automatic load matching method of DC even harmonic test of electric energy meter |
| CN106054110A (en) * | 2016-05-31 | 2016-10-26 | 国网河北省电力公司电力科学研究院 | Intelligent electric energy meter harmonic influence testing method |
| CN106501754A (en) * | 2016-10-19 | 2017-03-15 | 浙江恩鸿电子有限公司 | The direct current of three-phase electric energy meter and the experimental rig of even-order harmonic influence amount |
| CN216979271U (en) * | 2021-11-22 | 2022-07-15 | 煜邦电力智能装备(嘉兴)有限公司 | Testing device for wedging DC even harmonic equipment into AC electric energy meter calibration device |
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- 2021-11-22 CN CN202111383295.1A patent/CN114217259A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156273A (en) * | 2011-04-20 | 2011-08-17 | 郑州万特电气有限公司 | Electric energy meter verification circuit for error test and direct current and even harmonic test |
| CN104698425A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | Automatic load matching method of DC even harmonic test of electric energy meter |
| CN106054110A (en) * | 2016-05-31 | 2016-10-26 | 国网河北省电力公司电力科学研究院 | Intelligent electric energy meter harmonic influence testing method |
| CN106501754A (en) * | 2016-10-19 | 2017-03-15 | 浙江恩鸿电子有限公司 | The direct current of three-phase electric energy meter and the experimental rig of even-order harmonic influence amount |
| CN216979271U (en) * | 2021-11-22 | 2022-07-15 | 煜邦电力智能装备(嘉兴)有限公司 | Testing device for wedging DC even harmonic equipment into AC electric energy meter calibration device |
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