| Customization: | Available |
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| After-sales Service: | Online |
| Warranty: | 1 Year |
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Power frequency line parameter tester/Transmission line different frequency parameter testing machine
Product overview
Before the new high-voltage transmission line is put into operation, in addition to checking the insulation and phase of the line, various power frequency parameters should be measured as the actual basis for calculating the short-circuit current of the system, setting the relay protection, calculating the distribution of the power flow and selecting the reasonable operation mode. Generally, the parameters to be measured are DC resistance R, positive sequence impedance Z1, zero sequence impedance Z0, positive sequence capacitance C1 and zero sequence capacitance C0, and interphase capacitance C12.
Before measuring parameters, it is necessary to record the relevant design data of the line, such as line name, voltage level, line length, tower type, wire type and section, etc., and make a test plan according to these data and the field situation.
In the traditional power frequency parameter test of transmission lines, the test power supply is provided by three-phase autotransformer and large capacity isolation transformer, and the electrical signal is transformed by CT and PT for power measurement. Finally, the electrical parameters are measured by pointer type high-precision voltmeter, ammeter and power meter, and the test results of power frequency parameter of transmission lines are calculated. The whole set of test equipment is large and heavy, and needs to work with the crane, which is not conducive to field measurement, and because the test power supply is the power frequency power supply, it is easy to mix with the coupled power frequency interference signal, which brings great measurement errors, and the signal-to-noise ratio needs to be greatly improved, which further improves the capacity and volume of the power supply.
Power frequency line parameter tester/Transmission line different frequency parameter testing machine
The KDXL-IV transmission line parameter tester can accurately measure the power frequency parameters (positive sequence capacitance, zero sequence capacitance, positive sequence impedance, zero sequence impedance, mutual inductance and coupling capacitance, interphase capacitance, etc.) of various high-voltage transmission lines (overhead, cable, overhead cable mix, and multiple sets of the same pole).
The instrument meets the requirements of the "Regulations for the start and acceptance of 110 kV and above power transmission and transformation capital construction Projects", DL/T559-94 "Regulations for the operation and adjustment of 220-500kV network Relay Protection Devices" and "GB50150-2006".
The instrument adopts integrated structure, built-in variable frequency power module, variable frequency voltage adjustable output power supply. Digital filtering technology is adopted to avoid the interference of power frequency electric field, and the difficult problem of accurate measurement under strong electric field interference is fundamentally solved.
Power frequency line parameter tester/Transmission line different frequency parameter testing machine
Product characteristics
1, quickly and accurately complete the line's positive sequence capacitance, zero sequence capacitance, positive sequence impedance, zero sequence impedance and other parameters measurement, but also can measure the mutual inductance reactance between the lines, coupling capacitance, interphase capacitance measurement;
2, strong anti-interference ability, can be accurately measured under the condition of 1:10 ratio of different frequency signal and power frequency signal;
3, the external connection is simple, only one access to the lead line of the line under test can complete the line parameter measurement; Thoroughly solve the problems of cumbersome test wiring switching, interference, stability, accuracy and other aspects existing in the existing test means.
4, the instrument with high-speed single-chip microcomputer as the core, to achieve the integration of test power supply, instrument, calculation model, a truck of equipment concentrated into one instrument.
5, the instrument adopts 320*240 large screen dot matrix LCD display, imported rotary mouse operation, embedded Chinese micro printer printing results;
6, the instrument test process is fast, the instrument automatically completes the test, one minute to complete the measurement of a sequence parameter, the test time is shortened, and the traditional method of 1 day's work can be completed within 20 minutes;
7, high measurement accuracy, three groups of different frequency power supply 42.5Hz/57.5Hz 45Hz/55Hz 47.5Hz/52.5Hz A set of power frequency power supply 50.0Hz/50.0Hz
Optional, easy separation of power frequency and clutter interference, effectively achieve high-precision measurement of small signals;
Power frequency line parameter tester/Transmission line different frequency parameter testing machine
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Input power supply |
Three-phase AC380V±10%, 50Hz |
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Maximum output voltage |
AC 200V accuracy: 1% |
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Maximum output current |
5A |
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Output signal frequency |
42.5Hz/57.5Hz;45Hz/55Hz;47.5Hz/52.5Hz;50Hz/50Hz |
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Measuring range |
Positive sequence capacitance Zero sequence capacitance Coupling capacitance |
Positive sequence impedance Zero-sequence impedance Mutual inductive reactance |
Impedance Angle |
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0.1~50μF |
0.5~400Ω |
0~360° |
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Measurement resolution |
0.01μF |
0.01Ω |
0.01° |
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Measurement accuracy |
0.1μF~1μF ±3%±0.05μF 1μF~50μF ±1.5%±0.03μF |
0.5Ω~1Ω ±3%±0.05Ω 01Ω~400Ω ±3%±0.03Ω |
±0.2°(voltage>1.0V) ±0.3°(voltage>0.2~1.0V) |
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Anti-interference parameter |
Interference voltage: longitudinal induced voltage < 350V after connecting the instrument to test the power supply; Interference current: < 40A when the first and last ends of the line are short-grounded; It can complete the test stably and accurately under the condition that the ratio of output signal and interference signal is 1:10. |
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