CN217605999U - Transmission line parameter testing system - Google Patents
Transmission line parameter testing system Download PDFInfo
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- CN217605999U CN217605999U CN202221314819.1U CN202221314819U CN217605999U CN 217605999 U CN217605999 U CN 217605999U CN 202221314819 U CN202221314819 U CN 202221314819U CN 217605999 U CN217605999 U CN 217605999U
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Abstract
The utility model discloses a transmission line parameter testing system, which comprises a high-voltage switch, an anti-interference insulation resistance meter and an induction voltage current, wherein the high-voltage switch is grounded in a default state; the high-voltage switch has three, is first high-voltage switch, second high-voltage switch, third high-voltage switch respectively. The utility model integrates the anti-interference insulation resistance meter and the induction voltmeter ammeter into a set of system; the design of a full-electronic integrated machine is adopted, the volume is small, the weight is light, and the carrying is convenient. The alternating current induction voltage is attenuated and then is added to the insulation resistance meter in a resistance-capacitance voltage reduction mode, and the direct current voltage applied by the insulation resistance meter cannot be attenuated.
Description
Technical Field
The utility model relates to a transmission line field, the more specifically transmission line parameter testing system that says so.
Background
The power frequency parameters of the high-voltage transmission line are basic parameters necessary for the operation of a power grid, and the accuracy of the power frequency parameters directly influences the accuracy of the analysis, calculation and relay protection setting values of the operation mode of the power system. At the present stage, a line parameter tester is adopted for testing, although power frequency parameters can be obtained accurately, in the actual field parameter process, the field conditions are complex, and influence factors such as the influence of induced voltage and current of a high-voltage line, the safety problem of lightning overvoltage on testers and equipment, the testing efficiency and the like are more.
The current items for testing the parameters of the power transmission line include induced voltage measurement, insulation resistance measurement, line phase checking, direct current resistance measurement and power frequency parameter test. The power frequency parameters of induction voltage measurement, insulation resistance measurement, line phase checking and direct current resistance measurement and test are composed of four independent parts, an induction voltmeter is adopted for induction voltage measurement, an insulation resistance tester (megameter) is adopted for line phase checking and insulation resistance measurement, and after the insulation test is finished, the line parameter tester needs to be connected again for parameter test. In the process of disconnecting and connecting wires, if the induction voltage is higher, certain potential safety hazards exist, and meanwhile, when the induction voltage is high, the problems that the megger is damaged and measurement is unstable exist when the insulation resistance is measured by a common megger. After the parameter test is finished, the information such as the model number, the parameters and the like of the line stored in the database needs to be inquired to compare and judge the correctness of the test result.
SUMMERY OF THE UTILITY MODEL
In order to prevent inaccurate data caused by the factors in all aspects, wrong parameter information is provided for a dispatcher, based on the problems, a comprehensive power transmission line parameter test platform is researched and designed aiming at the requirement that high-voltage power transmission lines need to measure various power frequency parameters, and power transmission line power frequency parameter measurement, wiring switching and measured data management are integrated; the utility model provides a transmission line parameter testing system.
In order to achieve the above object, the utility model provides a following technical scheme:
a power transmission line parameter testing system comprises a high-voltage switch, an anti-interference insulation resistance meter and an induction voltage current, wherein the high-voltage switch is grounded in a default state; the high voltage switch has threely, is first high voltage switch, second high voltage switch, third high voltage switch respectively, wherein:
the movable end of the first high-voltage switch is connected with the power transmission line through the first high-voltage switch, one of the immovable ends of the first high-voltage switch is respectively connected with the anti-interference insulation resistance meter and the induction voltage ammeter, and the other immovable end of the first high-voltage switch is grounded; a resistance-capacitance voltage reduction circuit is arranged between the anti-interference insulation resistance meter and the power transmission line;
the movable end of the second high-voltage switch is connected with the power transmission line, one of the immovable ends of the second high-voltage switch is connected with an external test instrument, and the other immovable end of the second high-voltage switch is grounded;
and the movable end of the third high-voltage switch is connected with the power transmission line, one of the immovable ends of the third high-voltage switch is connected with the front-end power transmission line, and the other immovable end of the third high-voltage switch is grounded.
The high-voltage switch is a high-voltage vacuum circuit breaker.
The resistance-capacitance voltage reduction circuit comprises two resistors which are connected in series, and two ends of the resistor at the rear end are respectively connected with the capacitor and then grounded.
The control end of the high-voltage switch is remotely connected with a controller, and the controller remotely controls the opening and closing of the high-voltage switch through a control signal; the controller is connected with the cloud server through a wireless network, and the cloud server is connected with the mobile terminal through the wireless network or connected with the computer through a wired network.
The utility model discloses a technological effect and advantage:
(1) Integrating an anti-interference insulation resistance meter and an induction voltmeter ammeter into a set of system; the design of a full-electronic all-in-one machine is adopted, the volume is small, the weight is light, and the carrying is convenient.
(2) The anti-static induction voltage capability is obviously improved to 30kV, the anti-induction current is improved to 40A per phase and 120A per zero sequence; the equipment can adapt to different conditions: the temperature is minus 10 to 50 ℃; humidity ≦ 90% RH, improving the stability of the test.
(3) Checking the line phase by a direct current power supply method through developed equipment; the circuit nuclear phase measurement circuit insulation resistance and function is integrated into a circuit parameter tester, has anti-interference capability and outputs 5000V negative direct current voltage; the direct current resistance of the line can be measured and the conversion function according to the temperature can be realized; the function of measuring induced voltage is provided; the remote control can be realized, and the safety is improved;
(4) The alternating current induction voltage is attenuated and then is added to the insulation resistance meter in a resistance-capacitance voltage reduction mode, and the direct current voltage applied by the insulation resistance meter cannot be attenuated.
Drawings
FIG. 1 is a schematic diagram of the circuit structure of the present invention;
FIG. 2 is a schematic diagram of the remote control of the present invention;
FIG. 3 is a circuit diagram of a third embodiment;
FIG. 4 is a diagram of four circuits according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
The power transmission line parameter testing system shown in fig. 1 and 2 comprises a high-voltage switch, an anti-interference insulation resistance meter and an induced voltage and current, wherein the high-voltage switch is grounded in a default state; the high voltage switch has threely, is first high voltage switch K1, second high voltage switch K2, third high voltage switch K3 respectively, wherein:
the movable end of the first high-voltage switch K1 is connected with a power transmission line, one of the immovable ends of the first high-voltage switch K1 is respectively connected with an anti-interference insulation resistance meter and an induction voltage ammeter, and the other immovable end of the first high-voltage switch K1 is grounded; a resistance-capacitance voltage reduction circuit is arranged between the anti-interference insulation resistance meter and the power transmission line;
the movable end of the second high-voltage switch K2 is connected with the power transmission line through the first high-voltage switch K1, one of the immovable ends of the second high-voltage switch K is connected with the test instrument, and the other immovable end of the second high-voltage switch K is grounded;
and the movable end of the third high-voltage switch K3 is connected with the power transmission line, one of the immovable ends of the third high-voltage switch K3 is connected with the power transmission line at the front end, and the other immovable end of the third high-voltage switch K3 is grounded.
Preferably, the high-voltage switch is a high-voltage vacuum circuit breaker.
Preferably, the resistance-capacitance voltage reduction circuit comprises two resistors (R1, R2) connected in series, and two ends of the resistor at the rear end are respectively connected with the capacitors (C1, C2) and then grounded.
Preferably, the control end of the high-voltage switch is remotely connected with a controller, and the controller remotely controls the high-voltage switch to be opened or closed through a control signal; the controller is connected with the cloud server through a wireless network, and the cloud server is connected with the mobile terminal through the wireless network or connected with the computer through a wired network.
Example two
As shown in fig. 1, the system is in the off state at this time.
EXAMPLE III
As shown in fig. 3, when an anti-interference insulation resistance meter and an induced voltage/current meter are required to be used, the first high-voltage switch K1 is controlled to be switched on the anti-interference insulation resistance meter and the induced voltage/current meter, and the third high-voltage switch K3 is controlled to be switched on the front-end power transmission line, so that the test can be performed.
Example four
As shown in fig. 4, when other testing instruments are required to test the line parameters, the first high-voltage switch K1 is kept, the second high-voltage switch K2 is controlled to turn on the testing instrument, and the third high-voltage switch K3 is controlled to turn on the front-end power transmission line. Other parameter tests can be performed.
The utility model discloses a survey system upgrade to line parameter and reform transform, the anti-interference grade improves, the test that can satisfy 500kV transmission line power frequency parameter under the high-induction voltage reaches the analysis to electric power system operation mode, calculate and the accuracy of relay protection setting value, one of the enterprise that possess the anti high-induction line parameter testing equipment of the same kind in making the company become the electric wire netting, line parameter test is the rule requirement must be the test item, this equipment is the indispensable test equipment of 500kV voltage grade, market demand space is great.
And (3) social benefit analysis: can promote social employment. The equipment has requirements on transportation, hoisting, temporary outsourcing personnel and the like, and the development of various industries is promoted.
Improved comparison of before and after effects
(1) The anti-static induction voltage capability is obviously improved to 30kV, the anti-induction current is improved to 40A per phase and 120A per zero sequence; the equipment can adapt to different conditions: the temperature is-10 to 50 ℃; humidity ≦ 90% RH, improving the stability of the test.
(2) Checking the line phase by a direct current power supply method through developed equipment; the circuit nuclear phase measurement circuit insulation resistance and function is integrated into a circuit parameter tester, has anti-interference capability and outputs 5000V negative direct current voltage; the direct current resistance of the line can be measured and the conversion function according to the temperature can be realized; the function of measuring induced voltage is provided; the built-in Bluetooth can be in wireless communication with a mobile phone or a tablet personal computer, and the mobile phone or the tablet personal computer is used for operating and controlling an instrument, so that the safety is improved; the design of a full-electronic non-power frequency all-in-one machine is adopted, the volume is small, the weight is light, and the carrying is convenient. The reliability of the test is improved.
The foregoing is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the invention, and any modifications, equivalent alterations, improvements and the like made within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (5)
1. A transmission line parameter test system is characterized in that: the high-voltage switch grounding device comprises a high-voltage switch, an anti-interference insulation resistance meter and an induction voltage ammeter, wherein the high-voltage switch is grounded in a default state; the high voltage switch has threely, is first high voltage switch, second high voltage switch, third high voltage switch respectively, wherein:
the movable end of the first high-voltage switch is connected with the power transmission line through the first high-voltage switch, one of the immovable ends of the first high-voltage switch is respectively connected with the anti-interference insulation resistance meter and the induction voltage ammeter, and the other immovable end of the first high-voltage switch is grounded; a resistance-capacitance voltage reduction circuit is arranged between the anti-interference insulation resistance meter and the power transmission line;
the movable end of the second high-voltage switch is connected with the power transmission line, one of the immovable ends of the second high-voltage switch is connected with an external test instrument, and the other immovable end of the second high-voltage switch is grounded;
and the movable end of the third high-voltage switch is connected with the power transmission line, one of the immovable ends of the third high-voltage switch is connected with the power transmission line at the front end, and the other immovable end of the third high-voltage switch is grounded.
2. The transmission line parameter testing system of claim 1, characterized in that: the high-voltage switch is a high-voltage vacuum circuit breaker.
3. The transmission line parameter testing system of claim 1, characterized in that: the resistance-capacitance voltage reduction circuit comprises two resistors which are connected in series, and two ends of the resistor at the rear end are respectively connected with the capacitor and then grounded.
4. The transmission line parameter testing system of claim 1, characterized in that: the control end of the high-voltage switch is remotely connected with the controller, and the controller remotely controls the high-voltage switch to be opened and closed through a control signal.
5. The transmission line parameter testing system of claim 4, characterized in that: the controller is connected with the cloud server through a wireless network, and the cloud server is connected with the mobile terminal through the wireless network or connected with the computer through a wired network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221314819.1U CN217605999U (en) | 2022-05-30 | 2022-05-30 | Transmission line parameter testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221314819.1U CN217605999U (en) | 2022-05-30 | 2022-05-30 | Transmission line parameter testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217605999U true CN217605999U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221314819.1U Active CN217605999U (en) | 2022-05-30 | 2022-05-30 | Transmission line parameter testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605999U (en) |
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2022
- 2022-05-30 CN CN202221314819.1U patent/CN217605999U/en active Active
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