CN211655333U

CN211655333U - Intelligent capacitor capable of preventing switching oscillation

Info

Publication number: CN211655333U
Application number: CN202020344626.5U
Authority: CN
Inventors: 张峰; 王成; 娄佳均
Original assignee: Xinxiang Shengyuan Electric Co ltd
Current assignee: Xinxiang Shengyuan Electric Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-09
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a can prevent switching oscillation intelligent capacitor, which comprises a housing, the top of casing is provided with the top cap, one side of top cap is provided with the mounting groove, the inside of mounting groove is provided with wiring groove one, wiring groove two and wiring groove three, the internally mounted of top cap has the circuit board, the welding of top one side of circuit board has two net twine interfaces, zero line terminal is installed to one side of top cap, the L template is installed through the bolt in one side of casing, one side top of L template is provided with the earth post, the welding of top of circuit board has miniature circuit breaker, alternating current signal sampling circuit, CPU control, zero passage switching device, communication and self-healing power capacitor, top one side of top cap is provided with the panel. The utility model discloses prevent that the interference of primary line to secondary signal line has greatly improved complete machine interference killing feature, prevents to send reactive hazard to the electric wire netting because of the trouble, guarantees reactive compensation system's normal operating, can prevent that intelligent capacitor from taking place the switching oscillation.

Description

Intelligent capacitor capable of preventing switching oscillation

Technical Field

The utility model relates to an intelligent capacitor technical field especially relates to a can prevent switching oscillation intelligent capacitor.

Background

The intelligent capacitor integrates advanced technologies such as modern measurement and control, power electronics, network communication, automatic control, power capacitors and the like. The backward controller technology of the traditional reactive power compensation device and the backward switching technology of a mechanical contactor or a mechatronic switch as a switching capacitor are changed, and the bulky and heavy structural mode of the traditional reactive power compensation device are changed, so that the new generation of low-voltage reactive power compensation equipment has the characteristics of better compensation effect, smaller volume, lower power consumption, lower price, more cost saving, more flexibility in use, more convenience in maintenance, longer service life and higher reliability, and is suitable for the higher requirement of the modern power grid on reactive power compensation.

The intelligent capacitor in the prior art can not prevent the interference of a primary wire to a secondary signal wire, greatly reduces the anti-interference capability of the whole machine, can generate the reverse transmission reactive power hazard to a power grid due to faults, can not ensure the normal operation of a reactive power compensation system, and is easy to generate switching oscillation.

Therefore, it is desirable to design a smart capacitor capable of preventing switching oscillation to solve the above problems.

Disclosure of Invention

The utility model aims at solving the interference that exists among the prior art can not prevent the primary line to the secondary signal line, greatly having leaded to the complete machine interference killing feature to descend, can produce because of the trouble to the reactive hazard of the back-off of electric wire netting, can not guarantee reactive compensation system's normal operating, the switching oscillation shortcoming takes place easily for intelligent condenser, and the intelligent condenser that can prevent switching oscillation that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a can prevent switching oscillation intelligent capacitor, includes the casing, the top of casing is provided with the top cap, one side of top cap is provided with the mounting groove, the inside of mounting groove is provided with wiring groove one, wiring groove two and wiring groove three, the internally mounted of top cap has the circuit board, the welding of top one side of circuit board has two net twine interfaces, zero line terminal is installed to one side of top cap, the L template is installed through the bolt in one side of casing, one side top of L template is provided with the earth post, the welding of top of circuit board has miniature circuit breaker, alternating current signal sampling circuit, CPU control, zero passage switching device, communication and self-healing power capacitor.

The key concept of the technical scheme is as follows: the interference of a primary wire to a secondary signal wire is prevented, the interference resistance of the whole machine is greatly improved, the reverse transmission reactive damage to a power grid due to faults is prevented, the normal operation of a reactive compensation system is ensured, and the switching oscillation of an intelligent capacitor can be prevented.

Furthermore, a panel is arranged on one side of the top cover, and a display panel and a control panel are arranged on one side of the top of the panel.

Furthermore, a plurality of indicator lamps and a digital display tube are arranged at the top of the display panel, the control panel comprises four keys, and the four keys are respectively a menu, a standby key, an upper adjusting key and a lower adjusting key.

Furthermore, a plurality of air permeable grids are arranged on two sides of the top cover and are distributed at equal intervals.

Further, the switch is installed at the top of top cap, open at the top of top cap has three bolt hole, and three bolt hole corresponds with wiring groove one, wiring groove two and wiring groove three-phase respectively.

Furthermore, each partition board in the next year is arranged in the mounting groove, and a bottom plate is arranged at the bottom of the machine shell.

The utility model has the advantages that:

1. the weak current and the strong current are separated to be led in, so that the interference of the primary line to the secondary signal line is prevented, and the anti-interference capability of the whole machine is greatly improved; meanwhile, the method has the advantages of preventing the reactive power hazard of reverse feeding: by adopting the permanent fault tripping protection device, once the intelligent capacitor is in short circuit, the intelligent capacitor automatically trips and automatically exits from the power grid, the reactive power damage caused by the fault to the power grid is prevented, the normal operation of a reactive power compensation system is ensured, and the switching oscillation of the intelligent capacitor can be prevented.

2. The adoption of multiple series connections is simple: no matter the intelligent capacitor is quitted or connected, the network operation is not influenced, and the intelligent capacitor can be connected into a compensation sequence without any condition as long as the intelligent capacitor is connected. Thus, the multi-stage connection of the intelligent capacitor is greatly simplified.

3. The intelligent capacitor has multiple protection functions of automatic tripping for overcurrent, power failure, harmonic wave, over-temperature, pressure and short circuit and the like; because the protection, the switching and the compensation are integrated, the volume of the capacitor is greatly reduced, more intelligent capacitors with more capacities can be arranged in the same capacitor cabinet, the installation working time is shortened, and the capacity expansion is convenient; it can be used for automatic reactive compensation of centralized, on-site and on-column lines.

4. The intelligent capacitor is controlled to acquire alternating current signals by adopting a high-speed chip, and a zero-crossing switching device is matched to reduce the impact on the capacitor, prolong the service life of the capacitor and reduce the impact of surge current on a power grid; the capacitor adopts the technology of thickening the zinc-aluminum edge of the polypropylene metal film, and has the advantages of good self-healing performance, low capacity attenuation, strong impact resistance and long service life. Because the multi-machine control is realized by adopting communication, the reliability of system control is greatly improved.

Drawings

Fig. 1 is a schematic diagram of a front structure of an intelligent capacitor capable of preventing switching oscillation according to the present invention;

fig. 2 is a schematic diagram of a back structure of the intelligent capacitor capable of preventing switching oscillation according to the present invention;

fig. 3 is a schematic diagram of the compensation wiring of the intelligent capacitor capable of preventing switching oscillation according to the present invention;

fig. 4 is the utility model provides a can prevent mixed compensation wiring schematic diagram of switching oscillation intelligent capacitor.

In the figure: the device comprises a machine shell 1, a top cover 2, a panel 3, a display panel 4, an indicator light 5, a key 6, a ventilating grid 7, a switch 8, a bolt hole 9, a mounting groove 10, a partition plate 11, a first wiring groove 12, a second wiring groove 13, a third wiring groove 14, a zero line wiring terminal 15, a circuit board 16, a network cable interface 17, a grounding column 18 and a bottom plate 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, 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.

Referring to fig. 1 to 4, an intelligent capacitor capable of preventing switching oscillation includes a housing 1, a top cover 2 is disposed on the top of the housing 1, a mounting groove 10 is disposed on one side of the top cover 2, a first wiring groove 12, a second wiring groove 13 and a third wiring groove 14 are disposed inside the mounting groove 10, the first wiring groove 12, the second wiring groove 13, the third wiring groove 14, a zero line terminal 15 and a grounding post 18 are sequentially connected in a number-matching manner by Ua, Ub, Uc, Un and a grounding incoming line respectively, the first wiring groove 12, the second wiring groove 13 and the third wiring groove 14 are separated from a network line interface 17, a weak current and a strong current are separated for incoming line to prevent interference of a primary line to a secondary signal line, so that the anti-interference capability of the whole machine is greatly improved, a circuit board 16 is mounted inside the top cover 2, two network line interfaces 17 are welded on one side of the top of the circuit board 16, and the zero line terminal 15 is mounted on, the L template is installed through the bolt in one side of casing 1, and one side top of L template is provided with ground connection post 18, and the top welding of circuit board 16 has miniature circuit breaker, alternating current signal sampling circuit, CPU control, zero passage switching device, communication and self-healing power capacitor, has the reactive hazard of preventing to send backward simultaneously: by adopting the permanent fault tripping protection device, once the intelligent capacitor is in short circuit, the intelligent capacitor automatically trips and automatically exits from the power grid, the reactive power damage caused by the fault to the power grid is prevented, the normal operation of a reactive power compensation system is ensured, and the switching oscillation of the intelligent capacitor can be prevented.

As can be seen from the above description, the present invention has the following advantages: the weak current and the strong current are separated to be led in, so that the interference of the primary line to the secondary signal line is prevented, and the anti-interference capability of the whole machine is greatly improved; meanwhile, the method has the advantages of preventing the reactive power hazard of reverse feeding: by adopting the permanent fault tripping protection device, once the intelligent capacitor is in short circuit, the intelligent capacitor automatically trips and automatically exits from the power grid, the reactive power damage caused by the fault to the power grid is prevented, the normal operation of a reactive power compensation system is ensured, and the switching oscillation of the intelligent capacitor can be prevented.

Further, top one side of top cap 2 is provided with panel 3, and top one side of panel 3 is provided with display panel 4 and control panel, and display panel 4 convenient to use person observes intelligent capacitor's operating condition.

Further, the top of the display panel 4 is provided with a plurality of indicator lamps 5 and a digital display tube, the control panel comprises four keys 6, and the four keys 6 are respectively a menu, a standby key, an upper adjusting key and a lower adjusting key.

Furthermore, a plurality of ventilation grids 7 are arranged on two sides of the top cover 2, the ventilation grids 7 can enable heat generated by a circuit in the top cover 2 to be dissipated, the internal working environment of the top cover 2 is guaranteed, and the ventilation grids 7 are distributed equidistantly.

Further, a switch 8 is installed at the top of the top cover 2, three bolt holes 9 are formed in the top of the top cover 2, the three bolt holes 9 correspond to the first wiring groove 12, the second wiring groove 13 and the third wiring groove 14 respectively, and a bolt in each bolt hole 9 is used for fixing a power line in each wiring groove.

Furthermore, each partition board 11 is arranged in the installation groove 10 in the next year, the partition boards 11 can prevent the adjacent first wire grooves 12, second wire grooves 13 and third wire grooves 14 from being separated, and the bottom of the machine shell 1 is provided with a bottom board 19.

The intelligent capacitor is controlled by adopting the above arrangement, a high-speed chip is adopted to collect alternating current signals, and a zero-crossing switching device is matched to reduce the impact on the capacitor, prolong the service life of the capacitor and reduce the impact of surge current on a power grid; the capacitor adopts the technology of thickening the zinc-aluminum edge of the polypropylene metal film, and has the advantages of good self-healing performance, low capacity attenuation, strong impact resistance and long service life. Because the multi-machine control is realized by adopting communication, the reliability of system control is greatly improved.

In the following, some preferred embodiments or application examples are listed to help those skilled in the art to better understand the technical content of the present invention and the technical contribution of the present invention to the prior art:

example 1

An intelligent capacitor capable of preventing switching oscillation comprises a machine shell 1, wherein a top cover 2 is arranged at the top of the machine shell 1, one side of the top cover 2 is provided with a mounting groove 10, a first wiring groove 12, a second wiring groove 13 and a third wiring groove 14 are arranged inside the mounting groove 10, a first power wiring mounting wiring groove 12, a second wiring groove 13, a third wiring groove 14, a zero line binding post 15 and a grounding post 18 are sequentially connected in a number-checking mode through a Ua, a Ub, a Uc, a Un and a grounding incoming line respectively, the first wiring groove 12, the second wiring groove 13 and the third wiring groove 14 are separated from a network wire interface 17, a weak current and a strong current are separated to be led in, interference of a primary wire to a secondary signal wire is prevented, the anti-interference capability of the whole machine is greatly improved, a circuit board 16 is arranged inside the top cover 2, two network wire interfaces 17 are welded at one side of the top of the circuit board 16, the zero line, one side top of L template is provided with ground connection post 18, and the welding of circuit board 16's top has miniature circuit breaker, alternating current signal sampling circuit, CPU control, zero passage switching device, communication and self-healing power capacitor, has simultaneously and prevents to send down reactive hazard: by adopting the permanent fault tripping protection device, once the intelligent capacitor is in short circuit, the intelligent capacitor automatically trips and automatically exits from the power grid, the reactive power damage caused by the fault to the power grid is prevented, the normal operation of a reactive power compensation system is ensured, and the switching oscillation of the intelligent capacitor can be prevented.

Wherein, one side of the top cover 2 is provided with a panel 3, one side of the top of the panel 3 is provided with a display panel 4 and a control panel, and the display panel 4 is convenient for a user to observe the working state of the intelligent capacitor; the top of the display panel 4 is provided with a plurality of indicator lamps 5 and a digital display tube, the control panel comprises four keys 6, and the four keys 6 are respectively a menu, a standby key, an upper adjusting key and a lower adjusting key; a plurality of ventilation grids 7 are arranged on two sides of the top cover 2, the ventilation grids 7 can radiate heat generated by a circuit in the top cover 2, the working environment in the top cover 2 is ensured, and the ventilation grids 7 are distributed equidistantly; the top of the top cover 2 is provided with a switch 8, the top of the top cover 2 is provided with three bolt holes 9, the three bolt holes 9 correspond to the wiring groove I12, the wiring groove II 13 and the wiring groove III 14 respectively, and bolts in the bolt holes 9 fix power lines in the wiring grooves; each partition board 11 is arranged in the installation groove 10 in the next year, the partition boards 11 can prevent adjacent first wire grooves 12, second wire grooves 13 and third wire grooves 14 from being separated, and a bottom board 19 is arranged at the bottom of the machine shell 1.

Specifically, the utility model discloses a theory of operation as follows: during the use, power wiring installation wiring groove one 12, wiring groove two 13, wiring groove three 14, zero line terminal 15 and ground connection post 18 are Ua, Ub, Uc, Un and the wiring of ground connection inlet wire order pair number respectively, wiring groove one 12, wiring groove two 13 and wiring groove three 14 and net twine interface 17 part, adopt weak current and forceful electric power separation inlet wire, prevent the interference of primary wire pair secondary signal line, the complete machine interference killing feature has greatly been improved, the reactive power hazard of preventing to send backward has simultaneously: by adopting the permanent fault tripping protection device, once the intelligent capacitor is in short circuit, the intelligent capacitor automatically trips and automatically exits from the power grid, the reactive power damage caused by the fault to the power grid is prevented, the normal operation of a reactive power compensation system is ensured, and the switching oscillation of the intelligent capacitor can be prevented. The adoption of multiple series connections is simple: no matter the intelligent capacitor is quitted or connected, the network operation is not influenced, and the intelligent capacitor can be connected into a compensation sequence without any condition as long as the intelligent capacitor is connected. Thus, the multi-stage connection of the intelligent capacitor is greatly simplified. The intelligent capacitor has multiple protection functions of overcurrent, power failure, harmonic wave, over-temperature, pressure, short circuit automatic tripping and the like; because the protection, the switching and the compensation are integrated, the volume of the capacitor is greatly reduced, more intelligent capacitors with more capacities can be arranged in the same capacitor cabinet, the installation working time is shortened, and the capacity expansion is convenient; it can be used for automatic reactive compensation of centralized, on-site and on-column lines. The intelligent capacitor is controlled by adopting a high-speed chip to acquire alternating current signals, and a zero-crossing switching device is matched to reduce the impact on the capacitor, prolong the service life of the capacitor and reduce the impact of surge current on a power grid; the capacitor adopts the technology of thickening the zinc-aluminum edge of the polypropylene metal film, and has the advantages of good self-healing performance, low capacity attenuation, strong impact resistance and long service life. Because the multi-machine control is realized by adopting communication, the reliability of system control is greatly improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a can prevent switching oscillation intelligent capacitor, includes casing (1), its characterized in that, the top of casing (1) is provided with top cap (2), one side of top cap (2) is provided with mounting groove (10), the inside of mounting groove (10) is provided with wiring groove one (12), wiring groove two (13) and wiring groove three (14), the internally mounted of top cap (2) has circuit board (16), the welding of top one side of circuit board (16) has two net twine interfaces (17), zero line terminal (15) are installed to one side of top cap (2), the L template is installed through the bolt in one side of casing (1), one side top of L template is provided with ground connection post (18), the welding of top of circuit board (16) has miniature circuit breaker, exchanges signal sampling circuit, CPU control, zero cross device switching device, Communication and self-healing power capacitors.

2. The intelligent capacitor capable of preventing switching oscillation according to claim 1, wherein a panel (3) is arranged on one side of the top cover (2), and a display panel (4) and a control panel are arranged on one side of the top of the panel (3).

3. The intelligent capacitor for preventing switching oscillation as claimed in claim 2, wherein the display panel (4) is provided with a plurality of indicator lamps (5) and digital display tubes at the top, and the control panel comprises four keys (6), and the four keys (6) are respectively a menu, a standby, an up-adjustment key and a down-adjustment key.

4. The intelligent capacitor capable of preventing switching oscillation according to claim 1, wherein a plurality of air-permeable grids (7) are arranged on both sides of the top cover (2), and the air-permeable grids (7) are distributed equidistantly.

5. The intelligent capacitor capable of preventing switching oscillation according to claim 1, wherein a switch (8) is mounted on the top of the top cover (2), three bolt holes (9) are formed in the top of the top cover (2), and the three bolt holes (9) correspond to the first wiring groove (12), the second wiring groove (13) and the third wiring groove (14), respectively.

6. The intelligent capacitor capable of preventing switching oscillation according to claim 1, wherein each partition (11) is arranged in the installation groove (10) in the next year, and a bottom plate (19) is arranged at the bottom of the machine shell (1).