CN2798104Y - Tester for reactor turn-to-turn high-frequency oscillation - Google Patents

Abstract

The utility model relates to a tester for turn-to-turn high-frequency oscillation of a reactor, which is suitable for field use. The tester is composed of a voltage regulator, a testing transformer, a high-voltage DC generator, a discharging sphere gap and a measurement and control device. A capacitor after charged discharges for the reactor through the discharging sphere gap to form an oscillating discharge loop. The turn-to-turn insulation status of the reactor is tested through the change of a high-frequency oscillation waveform.

Description

Reactor turn-to-turn higher-order of oscillation test unit

Technical field

The utility model relates to a kind of higher-order of oscillation test unit that is used to detect the turn-to-turn insulation of dry-type high-voltage reactor, especially is suitable for the site test of dry-type air-core reactor.

Background technology

Reactor is being kept power system voltage stabilization, limiting short-circuit current, is being carried out aspects such as reactive-load compensation and have vital role.Appearance along with modern dry-type air-core reactor, and owing to its good linearty, low noise, high anti-short circuit capability, avoid advantage such as maintenance, thereby obtained in a lot of fields using widely, and its turn-to-turn insulation situation is an important factors that influences the dry-type air-core reactor security of operation.Just seem extremely important in effective detection that dry-type air-core reactor dispatches from the factory and run duration carries out turn-to-turn insulation.

Turn-to-turn insulation situation to the dry-type air-core reactor that moved detects, will be to the potential safety hazard of finding reactor, avoid having an accident and the accident that prevents enlarges and plays a positive role.

At present, be higher-order of oscillation withstand voltage test at the most effectual way of dry-type air-core reactor turn-to-turn insulation condition detection, the product quality of higher-order of oscillation withstand voltage test when guaranteeing that reactor dispatches from the factory played very crucial effect.On the market, also there is not high frequency Withstand test device complete, that be suitable for site test at present at home and abroad.

Test unit volume in the factory is big, weight is big, is not suitable for middle at the scene the use.From site test, no matter be domestic or external, all do not list the turn-to-turn higher-order of oscillation test of reactor in rules as essential examination or checking experiment project, but some unit recognizes the importance of this test and has designed easy test unit voluntarily and carried out site test, but because the restriction of testing transformer capacity and charging capacitor electric pressure, actual trial voltage is not high, only is equivalent to the system voltage level of reactor, and discharge can only be carried out by single.Although play a role in actual applications, high-frequency and high-voltage discharge continuous during with the reactor delivery test is compared, and it obviously is dissatisfactory that the single low pressure discharge detects on the effect in turn-to-turn insulation.

As a whole, both at home and abroad when the air reactor site test, mainly be the direct current resistance and the power frequency reactance of measuring reactor, and the insulation resistance and the power frequency withstand test that carry out insulator, these test findings are not reacted the turn-to-turn insulation performance of reactor body, and really the reactor operational reliability is impacted, be the built-in electrical insulation situation of reactor just, mainly be the turn-to-turn insulation situation.

Summary of the invention

The utility model provides a kind of reactor turn-to-turn higher-order of oscillation test unit that is suitable for work on the spot.Use this device that reactor is carried out higher-order of oscillation test, carry out analysis and judgement, turn-to-turn insulation state that can the reflected reactance device by variation to higher-order of oscillation waveform.Finally guarantee the safe and reliable operation of electric system.

According to reactor turn-to-turn higher-order of oscillation test unit of the present utility model, constitute by pressure regulator, testing transformer, high-voltage D.C. generator (including charging capacitor), ball discharge crack, measurement and control device, it is characterized in that high-voltage D.C. generator is the high voltage direct current voltage-multiplying circuit.

In this test unit, be 1～3 grade, perhaps adopt the another kind of voltage-multiplying circuit that transformer is had specific (special) requirements as the number of poles of the high voltage direct current voltage-multiplying circuit of high-voltage D.C. generator.

In this test unit, the ball discharge crack is the ball discharge crack of band portfire, and the ball crack is adjustable continuously.

The withstand voltage test of the reactor turn-to-turn higher-order of oscillation is the test of check reactor turn-to-turn insulation performance, has the principle work of obvious phase differential according to oscillating voltage waveform after the coil generation turn-to-turn short circuit.During concrete the test is the full voltage and the half voltage waveform of comparison reactor, according to having or not obvious phase differential to judge whether the turn-to-turn insulation of reactor is intact between the two.

This test unit is by pressure regulator and testing transformer, charging capacitor in the high voltage direct current voltage-multiplying circuit is charged, after reaching required value, adjust the ball stand-off distance from, make the ball crack when each power frequency period peak value to reactor discharge (ball-gap discharge can be controlled during actual tests), charging capacitor and tested reactor have just constituted the oscillating discharge loop like this, oscillation frequency is definite by charging capacitor and tested reactor, for:

${\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="Y20052001912200062.png"\; state="\{\{state\}\}">f</figure-callout>}}_1=\frac{1}{2\mathrm{\&pi;}\sqrt{\mathrm{LC}}}$

In the formula, L-reactor inductance, the electric capacity of C-charging capacitor

If turn-to-turn short circuit appears in reactor in the process of the test, then the reactor inductance amount will change, so the frequency of oscillating voltage can be expressed as:

${\mathrm{<figure-callout\; id="2"\; label="f"\; filenames="Y20052001912200062.png"\; state="\{\{state\}\}">f</figure-callout>}}_2=\frac{1}{2\mathrm{\&pi;}\sqrt{L^{\&prime;}C}}$

Difference appears in the phase place that shows as on the higher-order of oscillation waveform.At first enroll the waveform under the half voltage during test, under full voltage, carry out withstand voltage test in 1 minute then, detect the oscillating voltage waveform in real time and judge the turn-to-turn insulation state of reactor.

The utility model convenient transportation, to power supply capacity require little, use simply, not only can in manufacturer, use, can also be applicable to the site test of reactor.

Description of drawings

Fig. 1 is a theory diagram of the present utility model

Fig. 2 is an elementary diagram of the present utility model

Referring to Fig. 1, the input power supply is adjusted by pressure regulator (1), raise through testing transformer (2), capacitor in the high-voltage D.C. generator (3) is charged, then, capacitor, by the high-voltage dc voltage on direct current measurement (4) the part monitoring capacitor, is monitored the higher-order of oscillation waveform on the tested reactor by monitoring device (7) tested reactor (6) discharge simultaneously by igniting back, ball discharge crack (5).

Embodiment

Referring to Fig. 2, the whole test device is made of pressure regulator, testing transformer, high-voltage D.C. generator (including charging capacitor), ball discharge crack, measurement and control device.

The input power supply is regulated by pressure regulator (1), boost by testing transformer (2), capacitor in the high-voltage D.C. generator (3) is charged, high-voltage D.C. generator adopts the high voltage direct current voltage-multiplying circuit, voltage-multiplying circuit is 2 grades among the figure, actual fabrication can be chosen as 1～3 grade, also can adopt the another kind of voltage-multiplying circuit that transformer is had specific (special) requirements, then, capacitor discharges to tested reactor (6) by igniting back, ball discharge crack (5), simultaneously by the high-voltage dc voltage on the direct current measurement part monitoring capacitor, this direct current measurement partly contains voltage divider (4) and measurement instrument (8), by monitoring device the higher-order of oscillation waveform on the tested reactor is monitored, this monitoring device contains voltage divider (7) and surveying instrument (9), and the control section in the device is mainly controlled to satisfy testing requirements pressure regulator and ball discharge crack.

Claims (4)

1, a kind of reactor turn-to-turn higher-order of oscillation test unit is made of pressure regulator, testing transformer, high-voltage D.C. generator, ball discharge crack, measurement and control device, it is characterized in that high-voltage D.C. generator is the high voltage direct current voltage-multiplying circuit.

2, reactor turn-to-turn higher-order of oscillation test unit according to claim 1 is characterized in that the number of poles as the high voltage direct current voltage-multiplying circuit of high-voltage D.C. generator is 1～3 grade.

3, reactor turn-to-turn higher-order of oscillation test unit according to claim 1 is characterized in that the ball discharge crack of ball discharge crack for the band portfire.

4, dry-type air-core reactor turn-to-turn higher-order of oscillation test unit according to claim 1 is characterized in that distance is adjustable continuously between the ball discharge crack.

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