CN203587660U - High voltage transmission line positive sequence parameter and zero sequence parameter measuring intelligent control device - Google Patents
High voltage transmission line positive sequence parameter and zero sequence parameter measuring intelligent control device Download PDFInfo
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- CN203587660U CN203587660U CN201320743613.5U CN201320743613U CN203587660U CN 203587660 U CN203587660 U CN 203587660U CN 201320743613 U CN201320743613 U CN 201320743613U CN 203587660 U CN203587660 U CN 203587660U
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Abstract
The utility model discloses a high voltage transmission line positive sequence parameter and zero sequence parameter measuring intelligent control device. The device overcomes problems that in the conventional measuring method, various measuring meters are connected in a complex manner, measuring wiring and meter wiring need changing in different parameter measuring processes, and measuring tests are complicated. The device comprises a CPU module, a control signal optical coupler isolation circuit, a relay drive circuit, a contactor control circuit and a man-machine interaction system. The contactor control circuit is connected with an auxiliary side of a three-phase transformer, wherein two phases are respectively connected with two series-connected contactor assemblies, and the other phase is connected with a contactor and then outputted to connect a load. The middle point of the auxiliary side of the three-phase transformer is connected with the ground through a contactor. In a usage process, on-off states of the contactors are switched to output various testing power supply output signals to the load, so that tests on the positive sequence parameters and zero sequence parameters are completed. Testing operation is greatly simplified, operation efficiency is improved, and great convenience for on-site tests is brought.
Description
Technical field
The present invention relates to the positive order parameter of a kind of ultra-high-tension power transmission line, zero sequence parameter measurement intelligent controlling device, belong to power supply technical field of measurement and test.
Background technology
At present in engineering, measure the positive order parameter of ultra-high-tension power transmission line, Zero sequence parameter is used trichotomy conventionally, while measuring positive order parameter, need apply three-phase supply, measures voltage, electric current and the power signal of three-phase; While measuring Zero sequence parameter, single phase poaer supply be need apply, single-phase voltage, electric current and power signal measured.Owing to there is no desirable testing tool, while therefore testing, need to use powerful three-phase transformer, pressure regulator, on test line, apply after power-frequency voltage, by discrete meter meters such as reometer, voltage table, power meters, by reading, respectively show scale and try to achieve each parameter value after corresponding computing.The volume and weight of testing tool is larger, and especially the connection between each table meter is complicated, need change and measure wiring and instrument wiring while measuring different parameters, and testing experiment is loaded down with trivial details.
Summary of the invention
The present invention relates to the positive order parameter of a kind of ultra-high-tension power transmission line, zero sequence parameter measurement intelligent controlling device, solved between each meter meter of existing metering system, connect complicated, while measuring different parameters, need change wiring and instrument wiring, the problem that testing experiment is loaded down with trivial details measured.
The positive order parameter of a kind of ultra-high-tension power transmission line, zero sequence parameter measurement intelligent controlling device, comprise CPU module, control signal light lotus root buffer circuit, relay control circuit and man-machine interactive system, the secondary A of three-phase isolation transformer holds mutually with one end of the first contactor J1 and is connected, the A phase of the tested electrical network of another termination of J1; The secondary B of three-phase isolation transformer holds mutually successively and is connected with the B of tested electrical network with the second contactor J2 by the 4th contactor J4 connecting, the secondary C of three-phase isolation transformer holds mutually successively and is connected with the C of tested electrical network with the 3rd contactor J3 by the 5th contactor J5 connecting, and the neutral point of transformer is connected with ground by the 6th contactor; Inverter A phase output terminal holds input to be connected with the former limit A of three-phase isolation transformer mutually, and inverter B phase output terminal holds input to be connected with the former limit B of three-phase isolation transformer mutually, and inverter C phase output terminal holds input to be connected with the former limit C of three-phase isolation transformer mutually.
The 5th contactor J5 of described series connection all has the normally opened contact of a contactor and the A of tested electrical network to be connected mutually with the 3rd contactor J3 with the 4th contactor J4 and the second contactor J2.
The present invention relates to a kind of contactor control loop, thereby by the different conditions of control contactor, make the test of the positive order parameter of ultra-high-tension power transmission line and Zero sequence parameter can change by the mode of automatic control the tie lines relation of test line, without change again the wiring relation of test line by manual mode.
In order to reach above object, high-voltage transmission line parameter detector of the present invention comprises CPU module, control signal light lotus root buffer circuit, relay drive circuit, contactor control loop and man-machine interactive system.Described contactor control loop connects the secondary of three-phase transformer, and after wherein two-phase connects respectively two series contactors, another contactor that joins, output connects load, and the mid point of described three-phase transformer secondary is through a contactor ground connection.
Like this, as long as required, change the on off operating mode of each contactor, can change the mode of connection of load, form required test loop, to load, export different testing power supply output signals, thereby complete the three-phase voltage while measuring positive order parameter, electric current and power test, and the single-phase voltage while measuring Zero sequence parameter, the test of the various desired parameters such as electric current and power test, also form use single phase poaer supply and measured the needed measuring circuit of triphase parameter, can use single plane method to calculate needed triphase parameter by order impedance matrix, do not need manually to change the wiring relation of test line completely, greatly simplified test operation, improved work efficiency, and contribute to reduce volume and the weight of instrument, for site test brings great convenience.
During use test instrument, by the test lead external load of contactor control loop, by the menu of liquid crystal screen display, by knob, selected to confirm to measure operation, instrument is controlled the mode of connection of tested loaded line automatically.
Accompanying drawing explanation
Fig. 1 is contactor control loop schematic diagram.
Embodiment
Shown in contactor control loop schematic diagram 1, the mid point of three-phase transformer secondary is through normally opened relay J6 ground connection, the A of secondary meets test output terminal A after normally closed relay, and the B of secondary, C two-phase meet another two test output terminal B and C through normally closed relay J2, J4 and J3, the J5 of series connection respectively.And the normally opened contact of J4, J5 two relays is connected with A.
During use test instrument, by relay control circuit, three-phase supply be can apply, positive sequence impedance and zero sequence impedance measured.Concrete steering logic is as follows:
| Test event | J1 | J2 | J3 | J4 | J5 | J6 |
| Positive sequence impedance | Open | Open | Open | Open | Open | Open |
| Zero sequence impedance | Open | Open | Open | Close | Close | Close |
In a word, the present invention, by adopting intelligent control technology to realize intelligent control function, selects according to tester, can carry out the isoparametric measurement of positive sequence impedance, zero sequence impedance of ultra-high-tension power transmission line.Compared with prior art, when carrying out various parameter measurement, only need instrument to be correctly connected with test line, without the mode of connection that changes tested this side of transmission line of electricity, therefore greatly simplified test operation, improved test job efficiency.
Claims (2)
1. the positive order parameter of ultra-high-tension power transmission line, zero sequence parameter measurement intelligent controlling device, comprise CPU module, control signal light lotus root buffer circuit, relay control circuit and man-machine interactive system, it is characterized in that, the secondary A of three-phase isolation transformer holds mutually with one end of the first contactor J1 and is connected, the A phase of the tested electrical network of another termination of J1; The secondary B of three-phase isolation transformer holds mutually successively and is connected with the B of tested electrical network with the second contactor J2 by the 4th contactor J4 connecting, the secondary C of three-phase isolation transformer holds mutually successively and is connected with the C of tested electrical network with the 3rd contactor J3 by the 5th contactor J5 connecting, and the neutral point of transformer is connected with ground by the 6th contactor; Inverter A phase output terminal holds input to be connected with the former limit A of three-phase isolation transformer mutually, and inverter B phase output terminal holds input to be connected with the former limit B of three-phase isolation transformer mutually, and inverter C phase output terminal holds input to be connected with the former limit C of three-phase isolation transformer mutually.
2. the positive order parameter of ultra-high-tension power transmission line, zero sequence parameter measurement intelligent controlling device according to claim 2, is characterized in that: the 5th contactor J5 of described series connection all has the normally opened contact of a contactor and the A of tested electrical network to be connected mutually with the 3rd contactor J3 with the 4th contactor J4 and the second contactor J2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320743613.5U CN203587660U (en) | 2013-11-23 | 2013-11-23 | High voltage transmission line positive sequence parameter and zero sequence parameter measuring intelligent control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320743613.5U CN203587660U (en) | 2013-11-23 | 2013-11-23 | High voltage transmission line positive sequence parameter and zero sequence parameter measuring intelligent control device |
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| Publication Number | Publication Date |
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| CN203587660U true CN203587660U (en) | 2014-05-07 |
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| CN201320743613.5U Expired - Lifetime CN203587660U (en) | 2013-11-23 | 2013-11-23 | High voltage transmission line positive sequence parameter and zero sequence parameter measuring intelligent control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616544A (en) * | 2013-11-23 | 2014-03-05 | 国家电网公司 | Intelligent control device for measurement of positive-sequence parameter and zero-sequence parameter of high-tension power transmission line |
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2013
- 2013-11-23 CN CN201320743613.5U patent/CN203587660U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616544A (en) * | 2013-11-23 | 2014-03-05 | 国家电网公司 | Intelligent control device for measurement of positive-sequence parameter and zero-sequence parameter of high-tension power transmission line |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140507 |
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| CX01 | Expiry of patent term |