CN104868753B - A kind of compact closed gas isolated dc high pressure generator - Google Patents

Abstract

The present invention is a kind of compact closed gas isolated dc high pressure generator, including insulation and obturation sandwich type element, and it is installed on charging circuit, voltage-multiplying circuit and the resitstance voltage divider being electrically connected by wire in housing, medium position is provided with supports insulative cylinder in the housing, the charging circuit is fixed on one end of supports insulative cylinder, the voltage-multiplying circuit is individually fixed in the both side surface and overhead surface of supports insulative cylinder, and the resitstance voltage divider is fixed in the underlying surfaces of supports insulative cylinder side by side.High voltage direct current generator of the invention, can effectively reduce the volume and weight of high voltage direct current generator, while improve the insulating properties of equipment so that adapt to surpass, the purpose of the field test of extra-high voltage converting equipment and DC high potential test.

Description

A compact closed gas-insulated DC high voltage generator

technical field

The invention relates to a compact closed gas-insulated DC high voltage generator.

Background technique

The DC high voltage generator is a test equipment specially used to detect the DC voltage resistance characteristics and leakage current of electric equipment. Halo and ion currents and their effects, and leakage current tests for AC and DC equipment. However, traditional DC high-voltage generators for EHV and UHV are all open-type, and the DC test voltage is output through the overhead bus. However, because this kind of generating device uses air with poor insulation as the main insulating medium, it is bulky, the cost of separate transportation is high, and the workload of on-site installation is large, so it is not easy to carry out the on-site insulation characteristic test of substation equipment.

Contents of the invention

The purpose of the present invention is to provide a compact closed gas-insulated DC high-voltage generator, which can effectively reduce the volume and weight of the DC high-voltage generator, and at the same time improve the insulation performance of the equipment, so as to adapt to the field of ultra-high voltage and ultra-high voltage substation equipment The purpose of the test and DC high voltage test.

In order to achieve the above object, the technical solution adopted by the present invention is as follows: a compact closed type gas-insulated DC high voltage generator, including an insulating closed casing, and a charging circuit, a voltage doubler circuit and a charging circuit installed in the casing and electrically connected by wires The resistance voltage divider is characterized in that a supporting insulating cylinder is provided in the middle of the housing, the charging circuit is fixed on one end of the supporting insulating cylinder, and the voltage doubler circuit is respectively fixed on both sides of the supporting insulating cylinder and above On the surface, the resistor dividers are fixed side by side on the lower surface of the supporting insulating cylinder.

According to the solution above, the voltage doubling circuit includes a plurality of capacitors and a silicon stack, the capacitors are respectively located on both sides of the supporting insulating cylinder, and the silicon stack is located on the upper surface of the supporting insulating cylinder.

According to the above scheme, a transverse support insulating plate is also provided in the housing, and the transverse support insulating plates are arranged side by side above the support insulating cylinder, and there is an interval between the transverse support insulating plate and the support insulating cylinder, the Silicon stacks are fixed side by side within the space.

According to the above solution, a vertical supporting insulating plate is also provided in the housing, the vertical supporting insulating plate is arranged to cross the supporting insulating cylinder, and the vertical supporting insulating plate compresses the capacitor on the supporting insulating cylinder superior.

According to the above solution, the number of the vertical support insulating plates is the same as the number of capacitors, the plurality of vertical support insulating plates are respectively located on both sides of the support insulating cylinder, and the vertical support insulating plates located on both sides of the support insulating cylinder Board misalignment settings.

According to the above solution, a support insulator is provided between the resistance voltage divider and the lower part of the casing, and the support insulator presses and fixes the resistance voltage divider to the lower surface of the support insulation cylinder.

According to the solution above, there are multiple support insulators, and the multiple support insulators are arranged side by side at equal intervals.

According to the solution above, a junction box is provided outside the casing, and the junction box is electrically connected to the charging circuit through wires.

According to the above solution, the casing is filled with sulfur hexafluoride gas.

According to the above solution, the housing is provided with an opening for inflation and deflation that can be opened or closed.

In the compact closed-type gas-insulated DC high voltage generator of the present invention, the charging circuit, the voltage doubler circuit and the resistance voltage divider are respectively arranged around the supporting insulating cylinder in the casing, so that the voltage doubler circuit forms a side-by-side column structure, making full use of the sealed The inner space of the shell adopts a fully enclosed structure, and there is no need to install a pressure equalizing ring at the end of the high-voltage outlet, reducing the number of components, so that the present invention can greatly reduce the weight and volume of the equipment while ensuring the insulation performance, and facilitate the impact of gas insulation Transportation and on-site installation of the voltage generating device.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the electrical structure diagram of the present invention.

detailed description

The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a compact enclosed gas-insulated DC high-voltage generator according to the present invention includes an insulated closed casing 1, and a charging circuit and a voltage doubler circuit installed in the casing 1 and electrically connected by wires and a resistor divider, the housing 1 is provided with a supporting insulating cylinder 2 in the middle, the charging circuit is fixed on one end of the supporting insulating cylinder 2, and the voltage doubler circuit is respectively fixed on both sides of the supporting insulating cylinder 2 and the upper surface, the resistor divider is fixed side by side on the lower surface of the supporting insulating cylinder 2 . In the present invention, the charging circuit, the voltage doubling circuit and the resistance voltage divider are respectively arranged around the supporting insulating cylinder in the casing, so that the voltage doubling circuit forms a side-by-side column structure, fully utilizes the inner space of the sealed casing, and adopts a fully enclosed structure at the same time, eliminating the need for The voltage equalizing ring is installed at the end of the high-voltage outgoing line, which reduces the number of components, so that the present invention greatly reduces the weight and volume of the equipment while ensuring the insulation performance, and facilitates the transportation and on-site installation of the gas-insulated impulse voltage generator.

Specifically, the voltage doubling circuit includes a plurality of capacitors 3 and silicon stacks 4, the capacitors 3 are respectively located on both sides of the supporting insulating cylinder 2, and the silicon stacks 4 are located on the upper surface of the supporting insulating cylinder 2 At the same time, a transverse support insulating plate 21 is also provided in the housing, and the transverse support insulating plate 21 is arranged side by side above the support insulating cylinder 2, and there is a gap between the transverse support insulating plate 21 and the support insulating cylinder 2 The silicon stacks 4 are fixed side by side in the space. The installation and fixation of the silicon stack through the interval between the horizontal support insulating plate and the support insulating cylinder can not only better fix the silicon stack, but also save the installation space and reduce the volume and weight of the housing.

In addition, a vertical support insulating plate 22 is also provided in the housing, and the vertical support insulating plate 22 is arranged to cross the support insulating cylinder 2, and the vertical support insulating plate 22 presses the capacitor 3 on the On the supporting insulating barrel 2, specifically, the number of the vertical supporting insulating plates 22 is the same as the number of the capacitors 3, and the plurality of vertical supporting insulating plates 22 are respectively located on both sides of the supporting insulating barrel 2, and are located on the supporting insulating barrel 2. The vertical support insulating plates 22 on both sides of the insulating cylinder 2 are misplaced, which can fix the capacitor, avoiding the position shift of the capacitor due to loose fixation, resulting in failure, and also saving installation space and reducing the volume and weight of the housing.

Similarly, a support insulator 23 is provided between the resistance divider and the lower part of the housing, and the support insulator 23 presses and fixes the resistance divider 5 on the lower surface of the support insulating cylinder 2. Preferably, the There are multiple support insulators, and the multiple support insulators are arranged side by side at equal intervals, so that the resistance voltage divider can also be firmly installed and fixed, and at the same time, it can save installation space and reduce the volume and weight of the housing.

In addition, for the convenience of use, a junction box 24 is provided outside the casing, and the junction box 24 is electrically connected to the charging circuit through wires, and the high voltage generator can be conveniently electrically connected through the junction box.

Finally, the casing is filled with sulfur hexafluoride gas. Since the insulation performance of sulfur hexafluoride gas is better than that of mineral oil, the charging circuit adopts an exposed compact structure, and at the same time uses high-dielectric strength sulfur hexafluoride gas as the main insulation medium, reduce the requirements for the creepage distance of insulators, greatly reduce the insulation distance between high-voltage electrodes, further save installation space, and reduce the volume and weight of the shell. Accordingly, the housing is provided with an openable or closed opening for inflation and deflation, so as to facilitate the operation of inflation and deflation in the housing.

Referring to Fig. 2, it is the electrical structural diagram of high-voltage generator of the present invention, and charging circuit is voltage regulator L, and voltage regulator L is connected voltage doubler circuit, and voltage doubler circuit comprises four capacitors C1, C2, C3 and C4, and four The silicon stacks D1, D2, D3 and D4 are connected to the resistor divider R behind the voltage doubler circuit. After the above-mentioned electrical components are installed into the housing according to the connection method shown in the figure, a compact closed-type gas-insulated DC high-voltage generator can be assembled. Using high-insulation performance gas as the main insulation medium shortens the distance between electrodes and reduces the impact on The creepage distance requirements of components such as capacitors and silicon stacks can effectively reduce the volume and weight of the DC high-voltage generator, and at the same time improve the insulation performance of the equipment, so as to adapt to the field test of super- and ultra-high voltage substation equipment and the DC high-voltage test. Purpose.

Claims (9)

1. A compact closed-type gas-insulated DC high-voltage generator, comprising an insulating closed casing, and a charging circuit, a voltage multiplier circuit and a resistor divider installed in the casing and electrically connected by wires, wherein the A supporting insulating cylinder is provided in the middle of the housing, the charging circuit is fixed on one end of the supporting insulating cylinder, the voltage multiplier circuit is respectively fixed on both sides and the upper surface of the supporting insulating cylinder, and the resistor dividers are fixed side by side on the supporting the lower surface of the insulating cylinder; The voltage doubling circuit includes a plurality of capacitors and a silicon stack, the capacitors are respectively located on both sides of the supporting insulating cylinder, and the silicon stack is located on the upper surface of the supporting insulating cylinder. 2. The compact closed-type gas-insulated DC high voltage generator according to claim 1, characterized in that, a horizontal support insulating plate is also provided in the housing, and the transverse support insulating plate is arranged side by side on the support insulating cylinder above, and there is a space between the lateral support insulating plate and the support insulating cylinder, and the silicon stacks are fixed side by side in the space. 3. The compact closed-type gas-insulated DC high-voltage generator according to claim 1, wherein a vertical support insulating plate is also provided in the housing, and the vertical support insulating plate and the support insulating cylinder The capacitors are arranged crosswise, and the vertical supporting insulating plates compress the capacitors on the supporting insulating cylinders. 4. The compact enclosed gas-insulated DC high voltage generator according to claim 3, characterized in that the number of said vertically supporting insulating plates is the same as the number of capacitors, and the plurality of vertically supporting insulating plates are respectively located at the The two sides of the above-mentioned supporting insulating cylinder, and the vertical supporting insulating plates located on both sides of the supporting insulating cylinder are misplaced. 5. The compact closed-type gas-insulated DC high voltage generator according to claim 1, characterized in that, a support insulator is provided between the resistance voltage divider and the lower part of the housing, and the support insulator divides the resistance The pressing device is pressed and fixed on the lower surface of the supporting insulating cylinder. 6. The compact enclosed gas-insulated DC high voltage generator according to claim 5, characterized in that there are multiple support insulators, and the multiple support insulators are arranged side by side at equal intervals. 7 . The compact enclosed gas-insulated DC high voltage generator according to claim 1 , wherein a junction box is arranged outside the housing, and the junction box is electrically connected to the charging circuit through wires. 8. The compact enclosed gas-insulated DC high voltage generator according to claim 1, characterized in that the casing is filled with sulfur hexafluoride gas. 9 . The compact enclosed gas-insulated DC high voltage generator according to claim 8 , wherein an open or closed opening for charging and discharging gas is provided on the casing. 10 .