CN114156908A - Power capacitance compensation device - Google Patents
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- CN114156908A CN114156908A CN202111605584.1A CN202111605584A CN114156908A CN 114156908 A CN114156908 A CN 114156908A CN 202111605584 A CN202111605584 A CN 202111605584A CN 114156908 A CN114156908 A CN 114156908A
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- 239000003990 capacitor Substances 0.000 claims description 26
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000013135 deep learning Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
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- 238000004590 computer program Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
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- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention relates to a power capacitance compensation device, which structurally comprises: the general control equipment comprises a first network module, the electric power capacitance compensation device comprises a second network module, the first network module is connected with the second network module of at least one electric power capacitance compensation device, the network module comprises a wireless communication submodule and a wired communication module, and the wired communication module is connected with each electric power capacitance compensation device through a network cable. The power capacitance compensation device comprises a power distribution module, an output module connected with the power distribution module, and an input module connected with the power distribution module, wherein the input module is connected with the second network module, and the output module is connected with the second network module. Through above-mentioned technical scheme, can realize power capacitance compensation device's modularization, conveniently carry out the use and the maintenance in later stage, also brought very big convenience for production.
Description
Technical Field
The application relates to the technical field of power capacitor equipment, in particular to a power capacitance compensation device.
Background
Along with the improvement of economic level, various electric equipment also more and more get into people's life, make the also quick increase of power consumption, power capacitance compensation device uses in low voltage power supply system, can guarantee to reduce the reactive power in the electric wire netting, improve the device of system power supply efficiency and voltage quality, in the patent publication No. CN202586358U, traditional power capacitance compensation device, multi-purpose reactive compensation controller, the fuse, binding post, vertical female arranging, zinc oxide arrester, fuse formula isolator, current transformer, the bus frame, insulator and horizontal female arranging, various dispersed components and parts such as low voltage power capacitor and pilot lamp, in production, installation and use, all lack the flexibility, brought a great deal of inconvenience for people's use.
Therefore, it is necessary to develop a power capacitance compensation device for solving at least one of the above-mentioned technical problems.
Disclosure of Invention
The invention aims to provide a power capacitance compensation device, which comprises:
the master control equipment comprises a first network module, the power capacitance compensation device comprises a second network module, the first network module is connected with a second network module of at least one power capacitance compensation device, the network module comprises a wireless communication sub-module and a wired communication module, the wired communication module is connected with each power capacitance compensation device through a network cable, in the power capacitance compensation device, the power capacitance compensation device comprises a power distribution module, an output module connected with the power distribution module and an input module connected with the power distribution module, the input module is connected with the second network module, and the output module is connected with the second network module.
Optionally, the power distribution module includes a sub-controller, a switching module connected to the sub-controller, and a compensation module connected to the switching module, and the compensation module includes a split-phase capacitor and a three-phase capacitor.
Optionally, in the above power capacitance compensation device, the input module includes a memory, a wireless communication chip connected to the memory, and a wired communication interface.
Optionally, in the above power capacitance compensation device, the output module includes a display module, a sound module and an indication module, the display module includes a display screen, the sound module includes an alarm, and the indication module includes an indicator light.
Optionally, in the power capacitance compensation device, the wireless communication chip and the wired communication interface may be connected to a work keyboard, the display module is used to display input parameters, and the display module, the sound module and the indication module are used to display debugging or working conditions.
Optionally, in the above power capacitance compensation device, the memory is connected to the output module, and the memory is connected to the sub-controller of the power distribution module.
Optionally, in the above power capacitance compensation device, the sub-controller includes a single chip microcomputer.
Optionally, in the above power capacitance compensation device, the switching module includes a split-phase compound switch and a three-phase compound switch.
Optionally, in the above power capacitance compensation device, the input module further includes a monitoring module, and the monitoring module includes a camera connected to the sub-controller.
Optionally, in the above power capacitance compensation device, the camera automatically identifies the surrounding environment through deep learning.
Through above-mentioned technical scheme, can realize power capacitance compensation device's modularization, conveniently carry out the use and the maintenance in later stage, also brought very big convenience for production.
Additional features and advantages of embodiments of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the embodiments of the disclosure, but are not intended to limit the embodiments of the disclosure. In the drawings:
figure 1 is a block diagram of a power capacitance compensation device according to some embodiments of the present application,
figure 2 is a schematic diagram of a power capacitance compensation arrangement according to some embodiments of the present application,
fig. 3 is a schematic structural diagram of a power capacitance compensation device according to some embodiments of the present application.
Detailed Description
The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the embodiments of the application, are given by way of illustration and explanation only, not limitation.
Some block diagrams and/or flow diagrams are shown in the figures. It will be understood that some blocks of the block diagrams and/or flowchart illustrations, or combinations thereof, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the instructions, which execute via the processor, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks. The techniques of this application may be implemented in hardware and/or software (including firmware, microcode, etc.). In addition, the techniques of this application may take the form of a computer program product on a computer-readable storage medium having instructions stored thereon for use by or in connection with an instruction execution system.
Example 1:
the embodiment provides an intelligent combined low-voltage power capacitance compensation device applied to a low-voltage power grid, an intelligent compensation unit is formed by adopting a measurement and control module, a switching module, a compensation module and a protection module, and the intelligent combined low-voltage power capacitance compensation device can replace various dispersed components such as a reactive compensation controller, a fuse, an alternating current contactor, a thermal relay, a low-voltage power capacitor and an indicator light in the traditional compensation device, and brings great convenience to production and use. Referring to fig. 1, the structure of the power capacitance compensation device in this embodiment includes: the overall control device 110 comprises a first network module 111, the power capacitance compensation device 120 comprises a second network module 121, the first network module 111 is connected with the second network module 121 of at least one power capacitance compensation device 120, and the network modules 111 or 121 comprise a wireless communication sub-module and a wired communication module.
In the technical scheme, the wired communication module is connected with each power capacitance compensation device through a network cable, and the wireless communication sub-module enables the master control equipment to be connected with each power capacitance compensation device through a wireless signal, so that the expansion and the communication of the power compensation system are more convenient and easier. Furthermore, the power capacitance compensation device is connected through the same line, even if one device has a problem, the communication of other lines is not influenced, and the communication mode is more stable compared with the traditional serial communication mode between machines.
Example 2:
in this embodiment, on the basis of the structural scheme disclosed in embodiment 1, the power capacitance compensation device further includes a power distribution module 122, an output module 123, and an input module 124, where the input module 124 includes a memory, and the second network module 121 connected to the memory includes a wireless communication chip and a wired communication interface; the output module 123 includes a display module, a sound module and an indication module, the display module includes a display screen, the sound module includes an alarm, the indication module includes an indicator light, the input module 124 is connected with the second network module 121, and the output module 123 is connected with the second network module 121.
According to some embodiments of the application, the wireless communication chip and the wired communication interface can be connected with a work keyboard, input parameters are displayed through the display module, debugging or working conditions are displayed through the display module, the sound module and the indication module, the power distribution module comprises a sub-controller, a switching module connected with the sub-controller and a compensation module connected with the switching module, and the compensation module comprises a split-phase capacitor and a three-phase capacitor.
The storage is connected with the output module, the storage is connected with a sub-controller of the power distribution module, and the sub-controller comprises a single chip microcomputer.
The switching module comprises a split-phase compound switch and a three-phase compound switch, and can also be a synchronous switch, the synchronous switch comprises an alternating current contactor, the control structure is simple, the safety and reliability of the low-voltage capacitor switching switch greatly improved by the synchronous switch are improved, and the stability of the capacitor is improved.
The input module still includes monitoring module, monitoring module includes the camera of being connected with sub-controller, above-mentioned camera can be used for monitoring the surrounding environment condition, when discovering the abnormal conditions, output module through sub-controller in time reports for main control unit, thereby make the control people obtain abnormal information, it is concrete whether someone or animal are close to can come automatic discernment surrounding environment through the mode of degree of depth study, if have, can send warning information through output device, for example send warning information through pilot lamp or alarm.
According to some embodiments of the present application, the power capacitance compensation device comprises a cabinet shell, a bus, a circuit breaker, a disconnecting switch, a thermal relay, a contactor, a lightning arrester, a capacitor, a reactor, a primary wire, a secondary wire, a terminal strip, a power factor automatic compensation control device, a panel instrument and the like.
The existence of nonlinear components (harmonic waves) in the load can cause that other high-frequency (higher harmonic) currents flow through the capacitor circuit besides the power frequency fundamental wave current, so that the capacitor is damaged due to the conditions of overvoltage, overcurrent, over-capacitance, over-temperature and the like, or a capacitor bank is not put on the capacitor, for the occasion, besides the situation that a special filter capacitor can be selected to increase the self resistance, a filter loop can be formed by selecting and matching a proper reactor to filter the higher harmonic waves with stronger times, and the capacitor with higher rated voltage is selected, so that the method is also one of the methods for reducing harmonic accidents.
According to an embodiment of the present application, a load with a capacity of 700KW may have its natural power factor measured first, i.e. without a capacitor in case of full load start-up. If the power factor cos Φ 1 is estimated to be 0.70 and the power factor is to be increased to 0.90 in the rated state, the capacitance of the compensation capacitor needs to be:
before compensation: cos phi 1 is 0.70, phi 1 is 0.7953, tg phi 1 is 1.020
After compensation: cos phi 2 is 0.90, phi 2 is 0.451, tg phi 2 is 0.483
Qc＝P·(tgφ1-tgφ2)＝700×(1.020-0.483)＝375.9(Kvar)
After rounding, 378Kvar of capacitors needs to be compensated, and if a single 14Kvar capacitor bank is selected, 27 blocks are needed.
According to some embodiments of the present application, the largest is a single 30Kvar capacitor bank, and 12 banks can be installed in one cabinet, and before compensation, cos Φ 1 is 0.75, tg Φ 1 is 0.882, and Qc is Pe · (tg Φ 1-tg Φ 2) P · (0.882-0.483) 143.64 (Kvar).
Where Qc denotes the compensation capacitor capacity, P denotes the load active power, cos φ 1 denotes the pre-compensation load power factor, and cos φ 2 denotes the post-compensation load power factor.
In the alternating current circuit, the voltage and current phases of the resistor, the inductor and the capacitor element are characterized in that the current and the voltage are in the same phase in the pure resistor circuit; the current leads the voltage by 90 degrees in the pure capacitance circuit, the current lags the voltage by 90 degrees in the pure inductance circuit, and from the power supply perspective, the ideal load is that the power factor cos phi is 1, the utilization rate of the power supply equipment is the highest at the moment, but the current lags the voltage by 90 degrees in the pure inductance circuit, and the ideal load is that the power factor cos phi is 1, the utilization rate of the power supply equipment is the highest, but the ideal load is impossible in practice, only if the load in the system is assumed, all the loads are resistive, the possibility exists, and the properties of most of the electric load equipment in the circuit are inductive, so that the total current lags the voltage of the system is caused, so that in a power factor triangle, the reactive Q side is increased, the power factor is reduced, and the efficiency of the power supply equipment is reduced.
The power triangle is a right-angle triangle, cos phi (namely cosine of phi angle) is used for reflecting the quality of power consumption, and a large amount of inductive loads ensure that power equipment from power generation to power consumption is not fully applied in a power system, and a part of electric energy is exchanged back and forth between a power generation system, a power transmission system, a power transformation system and user equipment.
From another aspect, reactive power, which is not useless, is a necessary condition for the inductive devices to build up a magnetic field, and without reactive power, our transformer and motor cannot work properly. Therefore, it is the positive solution to try to solve the reduction of the reactive power.
In practical applications, the phase difference between the capacitance current and the inductance current is 180 degrees, which is called as mutual opposite phase, and the complementary characteristic can be utilized to connect a corresponding number of capacitors in parallel in the power distribution system. Reactive inductive current lagging behind voltage is counteracted by reactive capacitive current leading to voltage, active power components in the system are increased, cos phi is improved, and reactive current is exchanged among internal devices of the system. Therefore, the capacity of part of power equipment occupied in a reactive mode is reduced, the power factor of the system is improved, and the utilization rate of electric energy is improved.
When the electric equipment is used, active power and reactive power can be generated, the active power is provided for each electric equipment to be used, the reactive power is useless power for converting electric energy into a magnetic field and the like, and the line loss can be increased due to overlarge reactive power, so that the power supply efficiency is reduced, power compensation is used for improving the efficiency, and the power compensation equipment is used for aiming at the reactive power.
Example 3:
referring to fig. 2, a schematic structural diagram of a power capacitance compensation device according to some embodiments of the present application is shown, where CS1 to CS14 are complementary intelligent power capacitance compensation devices, and CS15 to CS28 are complementary intelligent power capacitance compensation devices, and all power capacitance compensation devices communicate with an overall control device through a network interface RJ 45-a.
Fig. 3 is a schematic structural diagram of a power capacitance compensation device according to some embodiments of the present application, where CS1 to CS28 are complementary intelligent power capacitance compensation devices, and all power capacitance compensation devices communicate with an overall control device through a network interface RJ 45-a.
Through above-mentioned technical scheme, can realize power capacitance compensation device's modularization, conveniently carry out the use and the maintenance in later stage, also brought very big convenience for production.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A power capacitive compensation device, comprising:
the general control equipment comprises a first network module, the electric power capacitance compensation device comprises a second network module, the first network module is connected with the second network module of at least one electric power capacitance compensation device, the network module comprises a wireless communication submodule and a wired communication module, and the wired communication module is connected with each electric power capacitance compensation device through a network cable.
The power capacitance compensation device comprises a power distribution module, an output module connected with the power distribution module, and an input module connected with the power distribution module, wherein the input module is connected with the second network module, and the output module is connected with the second network module.
2. The power capacitance compensation device according to claim 1, wherein the power distribution module comprises a sub-controller, a switching module connected to the sub-controller, and a compensation module connected to the switching module, the compensation module comprising a split-phase capacitor and a three-phase capacitor.
3. A power capacitance compensation device according to claim 1, wherein the input module comprises a memory, and the second network module connected to the memory comprises a wireless communication chip and a wired communication interface.
4. The power capacitive compensation device of claim 1, wherein the output module comprises a display module, a sound module and an indication module, the display module comprising a display screen, the sound module comprising an alarm, the indication module comprising an indicator light.
5. A power capacitance compensation device according to claim 3, wherein the wireless communication chip and the wired communication interface are connected to a work keyboard, the display module displays the input parameters, and the display module, the sound module and the indication module display the debugging or working conditions.
6. The power capacitance compensation device of claim 2, wherein the sub-controller comprises a single-chip microcomputer.
7. The power capacitance compensation device of claim 6, wherein the memory is coupled to the output module and the memory is coupled to a sub-controller of the power distribution module.
8. The power capacitive compensation device of claim 3, wherein the input module further comprises a monitoring module comprising a camera connected to a sub-controller.
9. The power capacitance compensation device of claim 2, the switching module comprising a split-phase compound switch and a three-phase compound switch.
10. The power capacitive compensation device of claim 1, the camera automatically identifying the surrounding environment through deep learning.
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| CN202111605584.1A CN114156908A (en) | 2021-12-25 | 2021-12-25 | Power capacitance compensation device |
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| CN202111605584.1A CN114156908A (en) | 2021-12-25 | 2021-12-25 | Power capacitance compensation device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201044362Y (en) * | 2006-12-22 | 2008-04-02 | 杭州华泰电气技术有限公司 | Intelligent low-voltage reactive-load compensation system |
| CN201774255U (en) * | 2010-01-06 | 2011-03-23 | 吴庆安 | Automatic reactive compensation system for electric power circuits |
| CN103475102A (en) * | 2013-09-18 | 2013-12-25 | 湖北华辰凯龙电力有限公司 | Energy efficiency management terminal based on Internet of Things |
| CN104578110A (en) * | 2015-01-15 | 2015-04-29 | 浙江大学 | Reactive compensation control method for distributed reactive compensation system |
| CN107645167A (en) * | 2017-11-29 | 2018-01-30 | 江苏现代电力科技股份有限公司 | A kind of security maintenance-free integrated power capacitance compensation module and control method |
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2021
- 2021-12-25 CN CN202111605584.1A patent/CN114156908A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201044362Y (en) * | 2006-12-22 | 2008-04-02 | 杭州华泰电气技术有限公司 | Intelligent low-voltage reactive-load compensation system |
| CN201774255U (en) * | 2010-01-06 | 2011-03-23 | 吴庆安 | Automatic reactive compensation system for electric power circuits |
| CN103475102A (en) * | 2013-09-18 | 2013-12-25 | 湖北华辰凯龙电力有限公司 | Energy efficiency management terminal based on Internet of Things |
| CN104578110A (en) * | 2015-01-15 | 2015-04-29 | 浙江大学 | Reactive compensation control method for distributed reactive compensation system |
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| Title |
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| 张加胜等: "《电力电子技术》", 31 May 2018 * |
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Application publication date: 20220308 |