CN208384063U

CN208384063U - A kind of insulator edge flashing discharge energy measuring device

Info

Publication number: CN208384063U
Application number: CN201821121153.1U
Authority: CN
Inventors: 翟芷萱; 张大鹏; 林莘; 杨明智; 温苗; 高佳; 周旭东; 李晓龙
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2018-07-16
Filing date: 2018-07-16
Publication date: 2019-01-15
Anticipated expiration: 2028-07-16

Abstract

A kind of insulator edge flashing discharge energy measuring device belongs to the sub- edge flashing field of measuring technique of High-Voltage Insulation, including closed air chamber, high-voltage DC power supply, multichannel oscillograph, disc insulator, sealed shell of tank, high-voltage conductive rod, grading ring, insulate submodel, low-field electrode, low voltage conductive bar, HF current transformer, high frequency capacitance, first insulated enclosure conductor rod, second insulated enclosure conductor rod, first RC divider, second RC divider and protective resistance, utility model device structure is simple, securely and reliably, it can be applied to direct current, exchange, the voltage conditions such as impact, it is adaptable；Utility model device can be applied widely using disc insulator, support insulator, drum type insulator and insulator sheet metal specimens, utility model device.

Description

A kind of insulator edge flashing discharge energy measuring device

Technical field

The utility model belongs to the sub- edge flashing field of measuring technique of High-Voltage Insulation, and in particular to a kind of insulator is along face Flashover discharge energy measuring device.

Background technique

As power transmission and transformation grade steps up that runing time is constantly elongated in country, the safe and stable operation of power equipment is aobvious Must be increasingly important, operative practice discovery GIS internal fault and disc insulator have much relations, and wherein disc insulator is dodged along face Failure proportion highest caused by network, disc insulator edge flashing voltage are far below air breakdown under equal conditions, so It is very valuable to the research of disc insulator edge flashing.Belong to can not be self-healing for insulating materials used in engineering at present Dielectric, once surface generation flashover damages it and may cause failure of insulation.Therefore, flashover occurs every time to insulating materials Extent of the destruction can become the availability and the standard that be assessed of damaged condition of the seal, insulator edge flashing The energy discharged can be used as a kind of flashover and define one of factor to insulating materials extent of the destruction, in recent years home and abroad scholar It focuses mostly on the research of edge flashing in the research to flashover voltage, charge, the utility model is intended to by edge flashing The measurement of voltage, current signal, survey calculation insulator edge flashing energy simultaneously, and then show that insulator exists in two ways Damage capability under different-energy effect.

Utility model content

To achieve the goals above, the utility model adopts the following technical solution:

A kind of insulator edge flashing discharge energy measuring device, including closed air chamber, high-voltage DC power supply and multichannel Oscillograph, the closed air chamber include disc insulator, and disc insulator bottom is provided with sealed shell of tank, the disc insulator Middle part is provided with high-voltage conductive rod, is provided with grading ring at the top of high-voltage conductive rod, lower end is provided with absolutely in the high-voltage conductive rod Edge submodel, and the submodel that insulate is located at sealed shell of tank inner cavity, the insulation submodel low potential side is connected with low-field electrode, low Piezoelectricity pole is connected by conducting wire with low voltage conductive bar, and low voltage conductive bar bottom end and sealed shell of tank bottom are fixedly mounted, described low Pressure conductor rod is disposed with HF current transformer and high frequency capacitance from top to bottom, and the sealed shell of tank right end sidewalls are provided with First insulated enclosure conductor rod and the second insulated enclosure conductor rod, the HF current transformer is connected with conducting wire one end, described The conducting wire other end is connected through the first insulated enclosure conductor rod with the multichannel oscillograph outside closed air chamber, the high frequency capacitance It is connected with conducting wire one end, the conducting wire other end the first capacitance-resistance outside the second insulated enclosure conductor rod and closed air chamber point Depressor is connected, and the multichannel oscillograph is connected with the first RC divider and the second RC divider respectively, the high straightening It flows positive pole and protective resistance is connected by conducting wire, protective resistance output end passes through the pressure of conducting wire Yu closed air chamber top respectively Ring and the second RC divider input terminal are connected, the second RC divider output end, the first RC divider output end and closing Gas chamber output end is connected by conducting wire with high-voltage DC power supply cathode.

The first insulated enclosure conductor rod and the second insulated enclosure conductor rod are disposed as teflon insulation sealing Conductor rod.

First RC divider and the second RC divider model are disposed as FRC divider, and dividing ratios are 1:1000.

The multichannel oscillograph model is set as MSO54 multichannel oscillograph, and bandwidth is 350MHz-2GHz.

The utility model has the beneficial effects that

1, utility model device structure is simple, securely and reliably, can be applied to the voltage conditions such as direct current, exchange, impact, It is adaptable.

2, utility model device can be thin using disc insulator, support insulator, drum type insulator and insulator Piece sample, utility model device are applied widely.

3, utility model device combination Q=UIT formula and Lie groupoid principle divide edge flashing energy There is high-frequency current signal acquisition synchronization, due to high frequency capacitance to be passed through, can there is phase in analysis, traditional Q=UIT mode Difference, leading to calculated result, there are errors；And the selection of lissajous figures capacitance size is relative complex, but lissajous figures method meter Calculation result is more preferable, therefore the exact value of discharge energy is calculated in conjunction with two methods, and passes through discharge energy and judge to insulate The damage capability of son.

Detailed description of the invention

Fig. 1 utility model device structural schematic diagram；

1- closed air chamber, 2- high-voltage DC power supply, 3- multichannel oscillograph, 4- disc insulator, 5- sealed shell of tank, 6- high Press conducting rod, 7- grading ring, 8- insulation submodel, 9- low-field electrode, 10- low voltage conductive bar, 11- HF current transformer, 12- High frequency capacitance, 13- the first insulated enclosure conductor rod, 14- the second insulated enclosure conductor rod, the first RC divider of 15-, 16- Two RC dividers, 17- protective resistance.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.

As shown in Figure 1, a kind of insulator edge flashing discharge energy measuring device, including closed air chamber 1, high voltage direct current Source 2 and multichannel oscillograph 3, the closed air chamber 1 include disc insulator 4, and 4 bottom of disc insulator is provided with sealed shell of tank 5, the maximum air pressure that can bear 0.6MPa in sealed shell of tank 5 is provided with high-voltage conductive rod 6, high pressure in the middle part of the disc insulator 4 Grading ring 7 is provided at the top of conducting rod 6, lower end is provided with insulation submodel 8 in the high-voltage conductive rod 6, and the submodel 8 that insulate Positioned at 5 inner cavity of sealed shell of tank, 8 material and shape of submodel that insulate are identical as disc insulator 4, and are the insulation of 2:1 scale smaller Submodel 8, insulation 8 low potential side of submodel are connected with low-field electrode 9, and low-field electrode 9 passes through conducting wire and 10 phase of low voltage conductive bar Even, and 10 bottom end of low voltage conductive bar and 5 bottom of sealed shell of tank are fixedly mounted, and low voltage conductive bar 10 is disposed with height from top to bottom Frequency current transformer 11 and high frequency capacitance 12,5 right end sidewalls of sealed shell of tank are provided with 13 He of the first insulated enclosure conductor rod Second insulated enclosure conductor rod 14, the HF current transformer 11 are connected with conducting wire one end, and the conducting wire other end is through the One insulated enclosure conductor rod 13 is connected with the multichannel oscillograph 3 outside closed air chamber 1, the high frequency capacitance 12 and conducting wire one end It is connected, the conducting wire other end is through the second insulated enclosure conductor rod 14 and the first RC divider 15 outside closed air chamber 1 It is connected, the multichannel oscillograph 3 is connected with the first RC divider 15 and the second RC divider 16 respectively, the high straightening 2 anode of galvanic electricity source connects protective resistance 17 by conducting wire, and protective resistance 17 prevents from damaging back since instantaneous large-current occurs for flashover Road other component, protective resistance 17 is according to specific flashover voltage and the tolerance electric current decision of gas device maximum, protective resistance 17 output ends pass through conducting wire respectively and are connected with the grading ring 7 on 1 top of closed air chamber and 16 input terminal of the second RC divider, and second 16 output end of RC divider, 15 output end of the first RC divider and 1 output end of closed air chamber pass through conducting wire and high voltage direct current 2 cathode of power supply is connected.

The first insulated enclosure conductor rod 13 and the second insulated enclosure conductor rod 14 are disposed as teflon insulation Sealed guide bar.

First RC divider 15 and 16 model of the second RC divider are disposed as FRC divider, and intrinsic standoff ratio Example is 1:1000, and high-pressure section and low pressure distribution separate when work, safe and reliable.

3 model of multichannel oscillograph is set as MSO54 multichannel oscillograph, and bandwidth is 350MHz-2GHz.

A kind of insulator edge flashing discharge energy measurement method is measured using a kind of insulator edge flashing discharge energy Device includes the following steps,

Step 1, link circuit connects high-voltage DC power supply 2, and manually controls average rate boosting by experimenter, until Flashover occurs for the submodel 8 that insulate, and stops boosting；

Step 2, step 1 is repeated, according to the measurement capacitor of the characteristic of sample repeatedly, until selecting suitable capacitance；

Step 3, start formal test, manually control and boost, with the continuous rising of voltage, the submodel 8 that insulate is sent out Raw flashover measures high pressure terminal voltage signal, loop current signals and high frequency capacitance terminal voltage signal by multichannel oscillograph 3；

Step 4, the high-voltage end voltage and loop current of the different periods measured according to step 3 are calculated exhausted by Q=UIT The discharge energy of 8 edge flashing of edge submodel, wherein Q is discharge energy, and U is high-voltage end voltage, and I is loop current；

Step 5, high frequency capacitance terminal voltage signal is measured according to step 3, and draws voltage using Lie groupoid method Variation diagram, and discharge energy is obtained by the area of curve enclosed region, by the comparison of step 4 and step 5, calculate more Accurate discharge energy facilitates the analysis of experimenter, and then judges flashover to the damage capability of insulator by discharge energy.

Claims

1. a kind of insulator edge flashing discharge energy measuring device, which is characterized in that including closed air chamber, high-voltage DC power supply With multichannel oscillograph, the closed air chamber includes disc insulator, and disc insulator bottom is provided with sealed shell of tank, the basin It is provided with high-voltage conductive rod in the middle part of formula insulator, is provided with grading ring, lower end in the high-voltage conductive rod at the top of high-voltage conductive rod It is provided with insulation submodel, and the submodel that insulate is located at sealed shell of tank inner cavity, the insulation submodel low potential side and low tension Extremely it is connected, low-field electrode is connected by conducting wire with low voltage conductive bar, and the fixed peace in low voltage conductive bar bottom end and sealed shell of tank bottom Dress, the low voltage conductive bar are disposed with HF current transformer and high frequency capacitance, the sealed shell of tank right end from top to bottom Side wall is provided with the first insulated enclosure conductor rod and the second insulated enclosure conductor rod, the HF current transformer and conducting wire one end It is connected, the conducting wire other end is connected through the first insulated enclosure conductor rod with the multichannel oscillograph outside closed air chamber, institute It states high frequency capacitance to be connected with conducting wire one end, the conducting wire other end is outside the second insulated enclosure conductor rod and closed air chamber First RC divider is connected, and the multichannel oscillograph is connected with the first RC divider and the second RC divider respectively, The high-voltage DC power supply anode connects protective resistance by conducting wire, and protective resistance output end passes through conducting wire and closed air chamber respectively The grading ring on top and the second RC divider input terminal are connected, and the second RC divider output end, the first RC divider are defeated Outlet and closed air chamber output end are connected by conducting wire with high-voltage DC power supply cathode.

2. a kind of insulator edge flashing discharge energy measuring device according to claim 1, it is characterised in that: described One insulated enclosure conductor rod and the second insulated enclosure conductor rod are disposed as teflon insulation sealed guide bar.

3. a kind of insulator edge flashing discharge energy measuring device according to claim 1, it is characterised in that: described One RC divider and the second RC divider model are disposed as FRC divider, and dividing ratios are 1:1000.

4. a kind of insulator edge flashing discharge energy measuring device according to claim 1, it is characterised in that: described more Oscilloscope channel model is set as MSO54 multichannel oscillograph, and bandwidth is 350MHz-2GHz.