CN113189438A - Static converter tester - Google Patents
Static converter tester Download PDFInfo
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- CN113189438A CN113189438A CN202110747778.9A CN202110747778A CN113189438A CN 113189438 A CN113189438 A CN 113189438A CN 202110747778 A CN202110747778 A CN 202110747778A CN 113189438 A CN113189438 A CN 113189438A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a static converter tester, which comprises a test cabinet, wherein a panel is arranged on the test cabinet; the test parameter display unit is arranged on the panel and is used for displaying test parameters; the system comprises a measurement and control host and a signal conditioning unit, wherein the signal conditioning unit is connected with a test parameter display unit through the measurement and control host; the device also comprises an input voltage sensor, an output voltage sensor, an input current sensor, an output current sensor and a detection circuit, wherein the detection circuit comprises a pure resistance load and a hysteresis load which are connected in parallel, and the input end of the detection circuit is used for being connected with A, B or C of the current transformer to be detected. The invention is mainly used for realizing the detection and maintenance of the main functions and technical indexes of the static converter, and has the advantages of simple structure, high detection effect and high accuracy.
Description
Technical Field
The invention relates to the technical field of test equipment, in particular to a static current transformer tester.
Background
The static converter is an emergency power supply which inverts direct current into alternating current to supply power to electric equipment under the condition that alternating current power supply fails; generally, before the product leaves the factory, the product is subjected to qualification testing to determine whether the product can work normally. However, the load box operation panel of the test bed for detecting the load box operation panel has the defects of messy layout of operation control elements, unclear division of functional areas and the like, and misoperation is often caused.
Therefore, in practical use, the static current transformer needs to be detected and maintained for main functions and technical indexes. The prior art lacks a special detection device.
Disclosure of Invention
The invention aims to provide a static converter tester which is mainly used for realizing the detection and maintenance of main functions and technical indexes of a static converter and has the advantages of simple structure and convenience in use.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a static current transformer tester comprising:
the testing machine cabinet is provided with a panel;
the test parameter display unit is arranged on the panel and is used for displaying test parameters;
the system comprises a measurement and control host and a signal conditioning unit, wherein the signal conditioning unit is connected with a test parameter display unit through the measurement and control host;
also comprises an input voltage sensor, an output voltage sensor, an input current sensor, an output current sensor and a detection circuit,
the detection circuit comprises a pure resistance load and a hysteresis load which are connected in parallel, the input end of the detection circuit is used for being connected with A, B or C of the converter to be detected, the output end of the detection circuit is connected with the negative electrode of the converter to be detected, the input end and the output end of the detection circuit are connected with the output voltage sensor, and the input end of the detection circuit is provided with an output current sensor;
the power supply DV + is provided with a switch S1, the input end of the output current sensor is provided with a switch S2, and the input ends of the pure resistance load and the hysteresis load are respectively provided with a switch S3 and a switch S4;
the power supply DV + and the power supply DV-are used for being connected with the converter to be tested;
the input current sensor is connected with the power supply DV + in series and used for detecting input current;
the input voltage sensor is connected with DV + and DV-of the power supply in parallel and used for detecting input voltage;
the input voltage sensor, the output voltage sensor, the input current sensor and the output current sensor are connected with the signal conditioning unit,
the converter to be tested, the switches S1, S2, S3 and S4 are connected with the measurement and control host.
The signal conditioning unit comprises a data acquisition unit and a data conditioning unit, the data acquisition unit is used for acquiring signals acquired by the input voltage sensor, the output voltage sensor, the input current sensor and the output current sensor, and the data conditioning unit is used for conditioning the signals acquired by the data acquisition unit and then sending the conditioned signals to the measurement and control host.
Further limiting, the measurement and control host comprises a control unit, a data processing unit and a state input detection unit, wherein the data processing unit is connected with the control unit, the state input detection unit and the data conditioning unit; the control unit is connected with the switches S1, S2, S3 and S4, and the state input detection unit is connected with the converter to be tested and used for detecting the state data of the converter to be tested.
Further and optimally, the test parameter display unit is a touch display screen.
Wherein, the data acquisition unit is a high-speed AD converter plate.
Further optimization, the panel is provided with a no-load test lamp, an inductive load test lamp, a pure resistance load test lamp and a phase sequence indicator lamp.
Compared with the prior art, the invention has the following beneficial effects:
the invention is mainly used for realizing the detection and maintenance of the main functions and technical indexes of the static converter, and has the advantages of simple structure, high detection effect and high accuracy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of the overall principle of the present invention.
FIG. 2 is a schematic view of the overall structure of the section I in FIG. 1 according to the present invention.
Fig. 3 is a schematic view of the overall structure of part ii in fig. 1 according to the present invention.
Fig. 4 is a schematic diagram of the control unit of the present invention.
Reference numerals:
the method comprises the steps of 1-a test parameter display unit, 2-a measurement and control host, 3-a signal conditioning unit, 4-an input voltage sensor, 5-an output voltage sensor, 6-an input current sensor, 7-an output current sensor, 8-a pure resistance load, 9-a hysteresis load, 10-a current transformer to be tested, 11-a control unit, 12-a data processing unit and 13-a state input detection unit.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
To simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 4, the present embodiment discloses a static current transformer tester, including:
the testing machine cabinet is provided with a panel;
a test parameter display unit 1 installed on the panel and used for displaying test parameters;
the system comprises a measurement and control host machine 2 and a signal conditioning unit 3, wherein the signal conditioning unit 3 is connected with a test parameter display unit 1 through the measurement and control host machine 2;
further comprises an input voltage sensor 4, an output voltage sensor 5, an input current sensor 6, an output current sensor 7 and a detection circuit,
the detection circuit comprises a pure resistance load 8 and a hysteresis load 9 which are connected in parallel, the input end of the detection circuit is used for being connected with A, B or C of the converter to be detected 10, the output end of the detection circuit is connected with the negative electrode of the converter to be detected 10, the input end and the output end of the detection circuit are connected with the output voltage sensor 5, and the input end of the detection circuit is provided with an output current sensor 7;
the power supply DV + is provided with a switch S1, the input end of the output current sensor 7 is provided with a switch S2, and the input ends of the pure resistance load 8 and the hysteresis load 9 are respectively provided with a switch S3 and a switch S4;
the power supply DV + and DV-is used for being connected with the converter 10 to be tested;
the input current sensor 6 is connected in series with the power supply DV + and is used for detecting input current;
the input voltage sensor 4 is connected in parallel with DV + and DV-of the power supply and is used for detecting input voltage;
an input voltage sensor 4, an output voltage sensor 5, an input current sensor 6 and an output current sensor 7 are connected with the signal conditioning unit 3,
the converter to be tested 10, the switches S1, S2, S3 and S4 are connected with the measurement and control host 2.
The signal conditioning unit 3 comprises a data acquisition unit and a data conditioning unit, the data acquisition unit is used for acquiring signals acquired by the input voltage sensor 4, the output voltage sensor 5, the input current sensor 6 and the output current sensor 7, and the data conditioning unit is used for conditioning the signals acquired by the data acquisition unit and then sending the conditioned signals to the measurement and control host 2.
Further, the measurement and control host 2 comprises a control unit 11, a data processing unit 12 and a state input detection unit 13, wherein the data processing unit 12 is connected with the control unit 11, the state input detection unit 13 and the data conditioning unit; the control unit 11 is connected with the switches S1, S2, S3 and S4, and the state input detection unit 13 is connected with the converter to be tested 10 and is used for detecting the state data of the converter to be tested 10.
Wherein, it should be noted that the power factor cos Φ =1 connected to the pure resistive load 8; and the power factor cos phi =0.8 of the lag load 9.
Further and optimally, the test parameter display unit 1 is a touch display screen.
Wherein, the data acquisition unit is a high-speed AD converter plate.
Further optimization, the panel is provided with a no-load test lamp, an inductive load test lamp, a pure resistance load test lamp and a phase sequence indicator lamp.
The invention is mainly used for realizing the detection and maintenance of the main functions and technical indexes of the static converter, and has the advantages of simple structure, high detection effect and high accuracy.
In actual use, the aims of detecting the indexes of the input characteristic performance of the converter, detecting the indexes of the output performance under no load and rated load and detecting the correctness of the phase sequence of the converter are mainly fulfilled.
The index detection of the input characteristic performance of the current transformer comprises the following steps:
(1) rated operating input voltage: 28 VDC;
(2) normal operating input voltage: (25-30) VDC;
(3) direct current input consumes current in no-load state: not more than 5A;
(4) direct current input consumption current in full load state: not greater than 51A;
the detection of the output performance indexes under no load and rated load comprises the following steps:
(1) output voltage: AC (115V ± 2.3V);
(2) output frequency: (400 ± 4) HZ;
(3) power factor: cos Φ =0.8 (hysteresis);
(4) power factor: cos Φ =1 (resistive) time;
(5) load characteristics: three-phase star load (with central line)
(5) The crest factor is 1.41 plus or minus 0.1;
(7) total harmonic content (THD) is not more than 2%;
when an empty test is performed:
all loads are disconnected, current and voltage signals are input, the output current is transmitted to the signal conditioning unit 3 for conditioning after the voltage signals are detected by the voltage sensor, the output voltage sensor 5, the input current sensor 6 and the output current sensor 7, the measurement and control host machine 2 collects and tests, and corresponding data are displayed on the test parameter display unit 1; the frequency and waveform of the alternating voltage signal are displayed;
at this point, the empty test light on the panel is on, indicating that an empty test is being performed at this point.
When performing the hysteresis test:
the lag load 9 is inductive, and current and voltage signals are input; outputting voltage and current signals, sending the signals to a conditioning unit by a voltage sensor, an output voltage sensor 5, an input current sensor 6 and an output current sensor 7 for conditioning, and displaying corresponding data on a test parameter display unit 1;
the specific display contents are as follows: inputting a voltage value; inputting a current value; outputting an effective value of the alternating voltage; outputting an alternating voltage waveform; outputting an effective value of the alternating current; outputting an alternating current waveform; outputting the phase difference between the alternating voltage and the alternating current; outputting an alternating current frequency; crest factor; the total harmonic content.
In actual use, the inductive load test lights on the panel are on.
When the pure resistance load 8 is tested, the hysteresis load 9 is disconnected at the moment, the pure resistance load 8 is connected, and the voltage sensor, the output voltage sensor 5, the input current sensor 6 and the output current sensor 7 detect input current and voltage signals; after the output voltage and current signals are sent to a conditioning unit for conditioning, corresponding data are displayed on a test parameter display unit 1;
the specific display contents are as follows: inputting a current value; outputting an effective value of the alternating voltage; outputting an alternating voltage waveform; outputting an effective value of the alternating current; outputting an alternating current waveform; outputting the phase difference between the alternating voltage and the alternating current; outputting an alternating current frequency; crest factor; the total harmonic content;
at this point, the pure resistive load 8 on the panel tests the lamp on.
Wherein, in the actual use, observe and control host computer 2 and choose 4U standard industrial computer for use, its specific configuration is as follows: 4U standard case; a dual core 2.6G CPU; 2G memory; 1T hard disk.
The data acquisition unit adopts a high-speed AD conversion board to acquire signals and analyze data; the high-speed AD conversion board is a high-speed acquisition card PCI8622, and the specific parameters are as follows:
250KS/s 16 bit 8 way analog input;
and (3) AD caching: an 8K word FIFO memory;
AD range: +/-10V, +/-5V, +/-2.5V, 0-10V and O-5V;
program control gain: 1, 2, 4, 8 times (default) or 1, 2, 5, 10 times or l, 10, 100, 1000 times;
AD triggering mode: and a plurality of digital quantity triggering modes.
The control unit 11 is composed of an optical isolation power amplifier switching value output board and a relay board, discrete values are selected, and PCI2390 is selected as input and output; the input/output of discrete signals can be simulated through the switching value control relay, the switching between high resistance/15 VDC and ground/high resistance is realized, and the functional block diagram is shown in figure 2.
The relay board adopts CRS6467, and the technical parameters are as follows:
the number of control paths: 32 paths, and each path is provided with a light emitting diode for on-off indication.
Maximum switching voltage: 110VDC, 250 VAC;
maximum switching current (single contact): 0.3A/125VAC 1A/30 VDC;
coil voltage: +12V or + 5V;
the power supply requirement is as follows: voltage: the 12VDC current is less than or equal to 700 mA;
ambient temperature: 0-60 ℃;
the external dimension is as follows: 210mm X115 mm.
In practical use, the test cabinet is a standard upper rack type cabinet, and the height of the standard upper rack type cabinet is 1.8 meters, and the width of the standard upper rack type cabinet is 0.8 meters.
The invention is mainly used for realizing the detection and maintenance of the main functions and technical indexes of the static converter, and has the advantages of simple structure, high detection effect and high accuracy; the test of multiple indexes of the static converter can be realized.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
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, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A static current transformer tester, comprising:
the testing machine cabinet is provided with a panel;
the test parameter display unit is arranged on the panel and is used for displaying test parameters;
the system comprises a measurement and control host and a signal conditioning unit, wherein the signal conditioning unit is connected with a test parameter display unit through the measurement and control host;
also comprises an input voltage sensor, an output voltage sensor, an input current sensor, an output current sensor and a detection circuit,
the detection circuit comprises a pure resistance load and a hysteresis load which are connected in parallel, the input end of the detection circuit is used for being connected with A, B or C of the converter to be detected, the output end of the detection circuit is connected with the negative electrode of the converter to be detected, the input end and the output end of the detection circuit are connected with the output voltage sensor, and the input end of the detection circuit is provided with an output current sensor;
the power supply DV + is provided with a switch S1, the input end of the output current sensor is provided with a switch S2, and the input ends of the pure resistance load and the hysteresis load are respectively provided with a switch S3 and a switch S4;
the power supply DV + and the power supply DV-are used for being connected with the converter to be tested;
the input current sensor is connected with the power supply DV + in series and used for detecting input current;
the input voltage sensor is connected with DV + and DV-of the power supply in parallel and used for detecting input voltage;
the input voltage sensor, the output voltage sensor, the input current sensor and the output current sensor are connected with the signal conditioning unit,
the converter to be tested, the switches S1, S2, S3 and S4 are connected with the measurement and control host.
2. The static current transformer tester of claim 1, wherein: the signal conditioning unit comprises a data acquisition unit and a data conditioning unit, the data acquisition unit is used for acquiring signals acquired by the input voltage sensor, the output voltage sensor, the input current sensor and the output current sensor, and the data conditioning unit is used for conditioning the signals acquired by the data acquisition unit and then sending the conditioned signals to the measurement and control host.
3. The static current transformer tester of claim 2, wherein: the measurement and control host comprises a control unit, a data processing unit and a state input detection unit, wherein the data processing unit is connected with the control unit, the state input detection unit and the data conditioning unit; the control unit is connected with the switches S1, S2, S3 and S4, and the state input detection unit is connected with the converter to be tested and used for detecting the state data of the converter to be tested.
4. The static current transformer tester of claim 1, wherein: the test parameter display unit is a touch display screen.
5. The static current transformer tester of claim 2, wherein: the data acquisition unit is a high-speed AD conversion board.
6. A static current transformer tester according to any one of claims 1 to 5 wherein: the panel is provided with a no-load test lamp, an inductive load test lamp, a pure resistance load test lamp and a phase sequence indicator lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110747778.9A CN113189438A (en) | 2021-07-02 | 2021-07-02 | Static converter tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110747778.9A CN113189438A (en) | 2021-07-02 | 2021-07-02 | Static converter tester |
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| CN113189438A true CN113189438A (en) | 2021-07-30 |
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| CN202110747778.9A Pending CN113189438A (en) | 2021-07-02 | 2021-07-02 | Static converter tester |
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