CN211603425U - Direct-current high-voltage test device capable of monitoring double-end leakage current in real time - Google Patents
Direct-current high-voltage test device capable of monitoring double-end leakage current in real time Download PDFInfo
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- CN211603425U CN211603425U CN201922306826.1U CN201922306826U CN211603425U CN 211603425 U CN211603425 U CN 211603425U CN 201922306826 U CN201922306826 U CN 201922306826U CN 211603425 U CN211603425 U CN 211603425U
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Abstract
The utility model discloses a direct current high voltage test device capable of monitoring double-end leakage current in real time, which relates to the technical field of lightning arrester test equipment and comprises a direct current high voltage generator and a current detection module, wherein the direct current high voltage generator comprises a control box and a voltage doubling cylinder, and a wireless communication module is arranged in the control box; the current detection module comprises a total current detection module and a branch current detection module; the total current detection module is connected in series between the top end of the voltage doubling cylinder and the connecting end of the series arrester; the branch current detection module is connected with the bottom end of the lightning arrester and then grounded; the total current detection module and the branch current detection module are respectively connected with the wireless communication module in a wireless mode, and the wireless communication module can read current data detected by the total current detection module and the branch current detection module. The device does not need manual reading and recording, and reduces the field test data error. Especially the respective reading of the double-end microammeter can be synchronously displayed on the display screen of the control box in real time.
Description
Technical Field
The utility model relates to a lightning arrester test equipment technical field, in particular to can be to bi-polar leakage current real-time supervision's direct current high voltage test device.
Background
Circuit more than 220kV voltage class, if carry out the arrester experiment to the arrester, then need to have a power failure to overhaul, then unpack apart the arrester connecting wire, the arrester often is two sets of or establish ties more than two sets of, often meet the condition of arrester top ground connection, because the restriction of site conditions can't unpack apart the primary line, or the primary line is unpacked apart and is installed once more after the experiment, the process is more troublesome and waste time, the direct current leakage test of arrester is carried out in the segmentation, need a lot of loaded down with trivial details work like this, extravagant manpower and material resources. The test site has some limitations on test equipment, and the test of the test article is relatively troublesome. And common withstand voltage test equipment can not detect multi-path current, and test progress can be seriously influenced by respectively testing a single path.
Disclosure of Invention
In order to solve the above problem, the utility model discloses a following technical scheme realizes:
the utility model discloses a based on under the multisection arrester series connection in service behavior, upgrade the improvement on original intelligent direct current high voltage generator basis, adopt wireless communication module automatic identification and read total current and branch road electric current, make it not tear open the lead wire and carry out arrester direct current withstand voltage test method. When a withstand voltage test is carried out, a value obtained by subtracting a reading (total current) of a microammeter from a reading (current of a lower section lightning arrester) of the microammeter on a high-voltage side is used as a leakage current of the upper section lightning arrester by a double microammeter method, and the specific steps are as follows:
a direct-current high-voltage test device capable of monitoring double-end leakage current in real time comprises a direct-current high-voltage generator and a current detection module, wherein the direct-current high-voltage generator comprises a control box and a voltage doubling cylinder, and a wireless communication module is arranged in the control box;
the current detection module comprises a total current detection module and a branch current detection module;
the total current detection module is connected in series between the top end of the voltage doubling cylinder and the connecting end of the series arrester;
the branch current detection module is connected with the bottom end of the lightning arrester and then grounded;
the total current detection module and the branch current detection module are respectively connected with the wireless communication module in a wireless mode, and the wireless communication module can read current data detected by the total current detection module and the branch current detection module.
Preferably, the total current detection module and the branch current detection module are both wireless microammeters.
Preferably, the wireless microammeter comprises a current sampling unit, a current data conversion unit and a bluetooth communication unit, wherein the current sampling unit is a current transformer or a current sampling circuit, and is connected with the current data conversion unit;
the current sampling unit is formed by a microcontroller with an A/D conversion function or a circuit with an independent A/D sampling chip and a controller;
the current sampling unit is connected with the Bluetooth communication unit;
the Bluetooth communication unit is connected with the wireless communication module through a Bluetooth protocol.
Preferably, the direct current high voltage generator comprises a low voltage rectification module, a high frequency inversion module, a voltage doubling rectification module, a control unit, a high voltage measurement module, a voltage signal filtering module, an A/D conversion unit, a single chip microcomputer, a feedback regulation module and a D/A conversion unit;
the output end of the low-voltage rectification module is connected with the input end of the high-frequency inversion module, the output end of the high-frequency inversion module is connected with the input end of the voltage-multiplying rectification module, and the output end of the voltage-multiplying rectification module is connected with the top end of the voltage-multiplying cylinder and then connected with the high-voltage measurement module;
the high-voltage measuring module is connected with the input end of the voltage signal filtering module, the first output end of the voltage signal filtering module is connected with the A/D conversion unit, and the second output end of the voltage signal filtering module is connected with the input end of the feedback adjusting module;
the output end of the feedback regulation module is connected with the input end of the control unit, and the output end of the control unit is connected with the control end of the high-frequency inversion module;
the other input end of the control unit is connected with the output end of the D/A conversion unit, the input end of the D/A conversion unit is connected with the output end of the single chip microcomputer, and the input end of the single chip microcomputer is connected with the output end of the A/D conversion unit;
the other input end of the singlechip is connected with the Bluetooth communication module;
the Bluetooth communication module is connected with the Bluetooth communication unit in a wireless mode.
The utility model discloses the device advantage has:
1) when two or more lightning arresters are connected in series, the 0.75-time characteristic of the lightning arrester can be directly tested without disassembling a bus;
2) the high-voltage leakage current test of the two sections of the lightning arresters can be finished by single voltage boosting, and the test of two branches can be measured simultaneously, so that the test efficiency is greatly improved;
3) all the collected data are sent to a system microprocessor for processing, manual reading and recording are not needed, and field test data errors are reduced. Particularly, the respective readings of the double-end microammeter can be synchronously displayed on a display screen of the control box in real time;
4) when the field test is carried out, the remote monitoring device can be far away from the high-voltage equipment to remotely observe real-time data.
The device comprises all functions of a common intelligent direct-current high-voltage generator testing device, various protection measures of the device are perfect, and the safety of testing personnel and testing equipment is guaranteed.
Drawings
Fig. 1 is a block diagram of the overall structure of the embodiment provided by the present invention;
fig. 2 is a schematic wiring diagram during field testing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described in detail and completely with reference to fig. 1 and 2 of the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
As shown in fig. 1 and 2, the direct-current high-voltage testing device capable of monitoring the leakage current of the two ends in real time comprises a direct-current high-voltage generator and a current detection module, wherein the direct-current high-voltage generator comprises a control box and a voltage doubling cylinder, and a wireless communication module is arranged in the control box. The current detection module comprises a total current detection module and a branch current detection module. The total current detection module is connected in series between the top end of the voltage doubling barrel and the connecting end of the series arrester, the branch current detection module is connected with the bottom end of the arrester and then grounded, the total current detection module and the branch current detection module are respectively connected with the wireless communication module in a radio mode, and the wireless communication module can read current data detected by the total current detection module and the branch current detection module. The total current detection module and the branch current detection module are wireless microammeters. The wireless microammeter comprises a current sampling unit, a current data conversion unit and a Bluetooth communication unit, wherein the current sampling unit is a current transformer or a current sampling circuit, and the current sampling unit is connected with the current data conversion unit. The current sampling unit is formed by a microcontroller with an A/D conversion function or a circuit with an independent A/D sampling chip and a controller. The current sampling unit is connected with the Bluetooth communication unit. The Bluetooth communication unit is connected with the wireless communication module through a Bluetooth protocol.
More specifically, as shown in fig. 1, the dc high voltage generator includes a low voltage rectification module, a high frequency inversion module, a voltage doubling rectification module, a control unit, a high voltage measurement module, a voltage signal filtering module, an a/D conversion unit, a single chip, a feedback adjustment module, and a D/a conversion unit, wherein an output end of the low voltage rectification module is connected to an input end of the high frequency inversion module, an output end of the high frequency inversion module is connected to an input end of the voltage doubling rectification module, and an output end of the voltage doubling rectification module is connected to a top end of a voltage doubling barrel and then connected to the high voltage measurement module. The high-voltage measuring module is connected with the input end of the voltage signal filtering module, the first output end of the voltage signal filtering module is connected with the A/D conversion unit, and the second output end of the voltage signal filtering module is connected with the input end of the feedback adjusting module. The output end of the feedback regulation module is connected with the input end of the control unit, and the output end of the control unit is connected with the control end of the high-frequency inversion module. The other input end of the control unit is connected with the output end of the D/A conversion unit, the input end of the D/A conversion unit is connected with the output end of the single chip microcomputer, and the input end of the single chip microcomputer is connected with the output end of the A/D conversion unit. The other input end of the singlechip is connected with the Bluetooth communication module. The Bluetooth communication module is connected with the Bluetooth communication unit in a wireless mode.
When the device works, a set of direct-current high-voltage generator device is used for field test, only one connecting cable is needed from the control box to the voltage doubling barrel, and signal wires such as optical fibers are not needed. The top end of the voltage doubling barrel is connected to a total ammeter and then connected to a connecting end of a series arrester, wherein high voltage is provided, the other end of the arrester is reliably grounded, and a wireless microammeter is connected to the lower end of one arrester in series, and the wireless microammeter is used as a measured branch current.
As shown in fig. 1, for the specific working principle of the dc high voltage generator, AC220V commercial power is used to access a control box, and is rectified into dc power by a low voltage rectification module through the inside of a case, and then sent to an inversion module to be converted into high frequency AC power, and sent to an intermediate frequency transformer to be converted into dc high voltage through a voltage doubling rectification system and output to a test sample. The total current collected by using the wireless microammeter on the test sample and the current collected at the low-voltage end of the test sample are sent to a microprocessor in the case through a wireless module, and the leakage current of each section of the test sample is displayed on a display screen after the processing is finished. The whole test equipment adopts perfect protection measures to ensure the normal operation of the test.
The specific implementation solution of the double-end leakage current acquisition is as follows, as shown in the schematic diagram of fig. 2, a wireless module device is adopted for communication, a receiving module is arranged in a main control case, a wireless microammeter is arranged at a high-voltage output end, and the wireless microammeter is the total current value I of the acquired lightning arresterGeneral assemblyAnother wireless microammeter is arranged at the voltage end of the lightning arrester to be tested at the bottom end, and the acquired branch current value I of the lightning arrester at the lower enddownTwo wireless microammeters transmit signals to the master control device, and AGeneral assemblyWatch and A1Establishing wireless communication of the meters, simultaneously reading leakage current values of the two meters in real time, sending the collected values into a single chip microcomputer for processing, AGeneral assemblySubtract A1The difference value is the leakage current value of the other section of the lightning arrester, and the upper section of the leakage current I can be displayed on the main control screen of the control box at the same timeupAnd lower section leakage current IdownCan be performed according to the change of the actual current valueAnd (5) refreshing in real time. After the test is finished, a test result report can be recorded and stored, and corresponding data comparison can be conveniently carried out later. The test is convenient, quick and efficient.
The utility model discloses the device advantage has:
1) when two or more lightning arresters are connected in series, the 0.75-time characteristic of the lightning arrester can be directly tested without disassembling a bus;
2) the high-voltage leakage current test of the two sections of the lightning arresters can be finished by single voltage boosting, and the test of two branches can be measured simultaneously, so that the test efficiency is greatly improved;
3) all the collected data are sent to a system microprocessor for processing, manual reading and recording are not needed, and field test data errors are reduced. Particularly, the respective readings of the double-end microammeter can be synchronously displayed on a display screen of the control box in real time;
4) when the field test is carried out, the remote monitoring device can be far away from the high-voltage equipment to remotely observe real-time data.
The device comprises all functions of a common intelligent direct-current high-voltage generator testing device, various protection measures of the device are perfect, and the safety of testing personnel and testing equipment is guaranteed.
Claims (4)
1. The utility model provides a can be to bi-polar leakage current real-time supervision's direct current high voltage test device, includes direct current high voltage generator, current detection module, its characterized in that:
the direct-current high-voltage generator comprises a control box and a pressure doubling cylinder, and a wireless communication module is arranged in the control box;
the current detection module comprises a total current detection module and a branch current detection module;
the total current detection module is connected in series between the top end of the voltage doubling cylinder and the connecting end of the series arrester;
the branch current detection module is connected with the bottom end of the lightning arrester and then grounded;
the total current detection module and the branch current detection module are respectively connected with the wireless communication module in a wireless mode, and the wireless communication module can read current data detected by the total current detection module and the branch current detection module.
2. The direct-current high-voltage test device capable of monitoring the double-end leakage current in real time according to claim 1, characterized in that:
the total current detection module and the branch current detection module are both wireless microammeters.
3. The direct-current high-voltage test device capable of monitoring the double-end leakage current in real time according to claim 2, characterized in that:
the wireless microammeter comprises a current sampling unit, a current data conversion unit and a Bluetooth communication unit, wherein the current sampling unit is a current transformer or a current sampling circuit and is connected with the current data conversion unit;
the current sampling unit is formed by a microcontroller with an A/D conversion function or a circuit with an independent A/D sampling chip and a controller;
the current sampling unit is connected with the Bluetooth communication unit;
the Bluetooth communication unit is connected with the wireless communication module through a Bluetooth protocol.
4. The direct-current high-voltage test device capable of monitoring the double-end leakage current in real time according to claim 3, characterized in that:
the direct-current high-voltage generator comprises a low-voltage rectification module, a high-frequency inversion module, a voltage-multiplying rectification module, a control unit, a high-voltage measurement module, a voltage signal filtering module, an A/D conversion unit, a single chip microcomputer, a feedback regulation module and a D/A conversion unit;
the output end of the low-voltage rectification module is connected with the input end of the high-frequency inversion module, the output end of the high-frequency inversion module is connected with the input end of the voltage-multiplying rectification module, and the output end of the voltage-multiplying rectification module is connected with the top end of the voltage-multiplying cylinder and then connected with the high-voltage measurement module;
the high-voltage measuring module is connected with the input end of the voltage signal filtering module, the first output end of the voltage signal filtering module is connected with the A/D conversion unit, and the second output end of the voltage signal filtering module is connected with the input end of the feedback adjusting module;
the output end of the feedback regulation module is connected with the input end of the control unit, and the output end of the control unit is connected with the control end of the high-frequency inversion module;
the other input end of the control unit is connected with the output end of the D/A conversion unit, the input end of the D/A conversion unit is connected with the output end of the single chip microcomputer, and the input end of the single chip microcomputer is connected with the output end of the A/D conversion unit;
the other input end of the singlechip is connected with the Bluetooth communication module;
the Bluetooth communication module is connected with the Bluetooth communication unit in a wireless mode.
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| CN201922306826.1U CN211603425U (en) | 2019-12-20 | 2019-12-20 | Direct-current high-voltage test device capable of monitoring double-end leakage current in real time |
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| CN201922306826.1U CN211603425U (en) | 2019-12-20 | 2019-12-20 | Direct-current high-voltage test device capable of monitoring double-end leakage current in real time |
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