CN212486130U - Voltage sag resistant device - Google Patents
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- CN212486130U CN212486130U CN202021477565.6U CN202021477565U CN212486130U CN 212486130 U CN212486130 U CN 212486130U CN 202021477565 U CN202021477565 U CN 202021477565U CN 212486130 U CN212486130 U CN 212486130U
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- 238000004146 energy storage Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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Abstract
The utility model discloses an anti-voltage sag device, which comprises a cabinet body, wherein a quick switching unit, an energy storage inversion unit and an intelligent communication terminal are arranged inside the cabinet body; the energy storage inversion unit comprises: the inverter is used for converting direct current of the energy storage battery into alternating current to supply power to a load; the fast switching unit includes: the switching controller is used for controlling the fast switching switch and the inverter; the intelligent communication terminal is connected with the switching controller. The rapid switching unit and the energy storage inversion unit are arranged in one cabinet body, so that the cabinet is convenient to use and simple in structure; the method is beneficial to improving the running stability and the power supply reliability of temporary important loads, has wide market application prospect and can bring great economic and social benefits.
Description
Technical Field
The utility model belongs to the technical field of power equipment, specifically relate to with an anti voltage sag device.
Background
With the rapid development of economy, various sensitive loads are applied more and more widely in industry, and the requirements of the loads on the quality of electric energy are high, and particularly, the influence of the amplitude of voltage on the sensitive loads is great. The voltage sag accidents are uncontrollable and unpredictable, which greatly increases the security difficulty, and the existing security measures are not enough to completely meet the requirements of all important security activities, especially for temporary important customers with lower security level of the power and power supply system compared with long-term important customers.
In order to realize the 'zero-flicker' power supply target, multiple safeguard measures are established and implemented step by means of the past safeguard experience, for example, a series of differentiated services such as safety assessment, hidden danger troubleshooting and the like are carried out for guaranteeing customers, but the following difficulties still exist in the existing safeguard work:
firstly, the guarantee range is wide and pointless. The distribution of clients is wide, and the guarantee range of each guarantee place is different, for example, a meeting center mainly guarantees that a meeting room lighting and sound system, an elevator and a fire fighting system are arranged in the scope, and a reception hotel mainly guarantees that a guest room, a dining room, an elevator and fire fighting are arranged in the scope. When a power grid fault occurs, the existing emergency measures are difficult to ensure. Secondly, the internal wiring form of the client is diversified. Because the inside wiring form of customer is diversified, lead to current emergent plan can't satisfy totally, and can't guarantee general emergency power supply unit homoenergetic and insert fast. And thirdly, the client is not configured with a self-contained power supply. The hidden danger of the power distribution room of the client is checked, and the fact that most of the clients are not provided with the self-contained power supply or the emergency power supply quick access device is found. When a power failure occurs and the power supply cannot be quickly recovered, a long-time power failure is caused. Fourthly, most of the guarantee objects are temporary important loads. The client guaranteeing range and the important load range change with different guaranteeing tasks, most of the guaranteeing clients belong to temporary important clients, and compared with important guaranteeing clients in a long term, the guaranteeing measures are relatively lagged. For such customers, a more versatile emergency power supply is lacking for improving the reliability of electricity usage in its temporary guarantee. Fifthly, the functions of emergency Power supplies such as UPS (uninterruptible Power supply) and the like are poor. When a power grid accident occurs, emergency power supplies such as a UPS are additionally arranged on important loads and are important guarantee measures, but the conventional UPS device has the problems of unstable performance, high failure rate, high installation and transformation difficulty and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an anti voltage sag device to among the solution prior art, lack general emergency power source, the problem that the power consumption reliability is low.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a voltage sag resistant device comprises a cabinet body, wherein a quick switching unit, an energy storage inversion unit and an intelligent communication terminal are arranged inside the cabinet body; the energy storage inversion unit comprises: the energy storage battery is connected with the inverter, and the inverter is connected with a load; the inverter is used for converting the direct current of the energy storage battery into alternating current to supply power to a load;
the fast switching unit includes: the switching controller is respectively connected with the inverter and the fast switching switch, and the switching controller is used for controlling the fast switching switch and the inverter; the intelligent communication terminal is connected with the switching controller; and a display is mounted on the instrument door of the cabinet body and connected with the switching controller.
Specifically, the intelligent communication terminal is a 4G network communication device and is connected with the control background through a 4G network.
Specifically, the inverter and the switching controller are respectively connected with a timing module.
The intelligent cabinet comprises a cabinet body, an alarm module, a current and voltage detection module and a control module, wherein the alarm module and the current and voltage detection module are used for detecting the voltage and the current of a power circuit in the cabinet body; the alarm module and the voltage and current detection module are respectively connected with the switching controller.
Specifically, the inverter includes: the input end of the EMI filter is connected with the energy storage battery, the output end of the EMI filter is connected with the input end of the LLC full-bridge resonant converter, and the output end of the LLC full-bridge resonant converter is connected with the input end of the plate bridge inverter circuit through the isolation output.
Specifically, a CPU is arranged in the inverter, and the CPU is a DSP digital control board; an LCD display is arranged on the inverter and connected with the DSP digital control board.
Specifically, the length, width and height of the cabinet body are respectively 800mm, 800mm and 1500 mm.
Specifically, the cabinet body is divided into an upper cabinet body and a lower cabinet body; the display is installed on the outer side of the instrument door of the upper cabinet body, and the switching controller is installed on the inner side of the instrument door of the upper cabinet body; the intelligent communication terminal is arranged inside the upper cabinet body; the energy storage inversion unit and the quick change-over switch are arranged inside the lower cabinet body.
Specifically, the energy storage battery adopts a TMDD15/220 type capacitor battery.
Specifically, the communication interface of the switching controller is an electrically isolated RS-485 communication interface; the communication interface of the inverter is one or more of RS 232/485/CAN/Ethernet interfaces.
The utility model has the advantages as follows:
the voltage sag resistant device provided by the embodiment of the utility model arranges the rapid switching unit and the energy storage inversion unit in a cabinet body, thereby being convenient to use and simple in structure; the method is beneficial to improving the running stability and the power supply reliability of temporary important loads, has wide market application prospect and can bring great economic and social benefits.
Further, on the one hand, the embodiment of the utility model provides an application for anti voltage sag key equipment carries out prospective discussion and correlation technique accumulation to promote the development of distribution network power supply quality guarantee technique from this, improve power supply guarantee work efficiency, reduce the power protection cost such as power-generating cars and personnel's configuration. Meanwhile, through further popularization of project achievements, equipment leasing service can be carried out among some clients with requirements, and therefore certain economic benefits are brought to companies. On the other hand, the power supply failure rate of important customers can be effectively reduced, economic and political losses caused by power failure are avoided, and the satisfaction degree of the power supply service of the customers is improved, which is the embodiment that a company fulfills social responsibility and has certain social benefits.
Further, through at the internal intelligent communication terminal that sets up of cabinet, can with the utility model discloses the operational data transfer of anti voltage sag device realizes real time monitoring to the control backstage.
Furthermore, the inverter and the switching controller are respectively connected with a timing module, so that when the power utilization of the load is switched, the switching time is accurately controlled, and the power utilization reliability of the load is ensured.
Furthermore, an alarm module is arranged and connected with the switching controller, and when the abnormal voltage and current are detected, the alarm module gives an alarm in time.
Furthermore, the direct current input and the alternating current output of the inverter are completely electrically isolated, and the requirement on the power inverter in the integrated power supply design can be met without an external isolation transformer.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of an anti-voltage sag device according to an embodiment of the present invention;
fig. 2 is a schematic external structural diagram of an anti-voltage sag device according to an embodiment of the present invention;
fig. 3 is a circuit diagram of an inverter of the voltage sag prevention device according to an embodiment of the present invention;
wherein: the intelligent cabinet comprises a cabinet body 1, a display 2, an upper cabinet body 11, a lower cabinet body 12, a switching controller 3, a quick switching switch 4, an inverter 5 and an energy storage battery 6.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.
The embodiment of the utility model provides an anti voltage sag device adopts active quick switching design scheme, adopts the mechanical type fast switch over based on eddy current drive to be the fast switch over unit, adopts energy storage battery as the energy storage medium, through DC AC inverter output and the synchronous AC220V alternating current power supply of electric wire netting, as the short-term stand-by power supply of electric wire netting. When voltage sag or short-time power failure occurs in the power grid, the power consumption sensitive equipment (load) is quickly switched to the energy storage inversion unit for power supply through the eddy current driving vacuum quick switching switch (switching time is less than 5ms), and after the power grid is recovered to be normal, the power grid is switched back for power supply, so that the power consumption sensitive equipment (load) can normally work in the period of power grid fluctuation, and the serious economic loss is avoided.
The voltage sag resistant device can be used for distributed and multipoint in-situ treatment scenes. Each device can carry a sensitive load of 10kW/20min at most, is the most effective and most economical way for controlling voltage sag at present, completely meets the control mode of the requirements of class I and class II sensitive loads on the continuity of the power supply quality, and is suitable for meeting rooms, precision manufacturing, large public place illumination and other places where the sensitive loads have the requirements on the continuity of the power supply quality.
The voltage sag resistant device comprises a cabinet body 1, wherein a fast switching unit, an energy storage inversion unit and an intelligent communication terminal are arranged inside the cabinet body 1. The length, width and height of the cabinet body 1 are respectively 800mm, 800mm and 1500 mm.
The energy storage inversion unit comprises: the energy storage battery is connected with the inverter, and the inverter is connected with a load; the inverter is used for converting the direct current of the energy storage battery into alternating current to supply power to the load. The fast switching unit includes: the switching controller is respectively connected with the inverter and the fast switching switch, and the switching controller is used for controlling the fast switching switch and the inverter. The intelligent communication terminal is connected with the switching controller, is 4G network communication equipment, is connected with the control background through a 4G network, and transmits the real-time running data of the embodiment to the control background to realize real-time monitoring. The instrument door of the cabinet body 1 is provided with a display 2, and the display 2 is connected with the switching controller and used for displaying the running data, the voltage, the current, the closing state of the rapid switching switch and the like of the device.
The cabinet body 1 is divided into an upper cabinet body 11 and a lower cabinet body 12; the display 2 is arranged on the outer side of the instrument door of the upper cabinet body 11, and the switching controller is arranged on the inner side of the instrument door; the intelligent communication terminal is arranged inside the upper cabinet body 11; the energy storage inversion unit and the fast switch are arranged inside the lower cabinet body 12. The energy storage battery adopts a TMDD15/220 type capacitor battery. The communication interface of the switching controller is an electrically isolated RS-485 communication interface; the communication interface of the inverter is one or more of RS 232/485/CAN/Ethernet interfaces.
The inverter and the switching controller are respectively connected with a timing module, and the power utilization switching time and the detection time of the load are controlled in real time through the timing module. The switching controller detects the current and voltage of each power line and the energy storage battery in the cabinet body 1 through the voltage and current detection module, the alarm module is connected with the switching controller through the alarm module, and when the voltage and the current are detected to be abnormal, the alarm module gives an alarm in time.
A VFC series "eddy current drive" fast circuit breaker was used as the fast transfer switch. The VFC series eddy current driving fast breaker is a direct-acting type fast permanent magnet vacuum breaker which is manufactured by Max-Swi company in Canada, has the advantages of energy storage capacity, eddy current disc driving, permanent magnet maintaining, mechanical brake opening time of less than 2ms and maximum breaking current of not less than 80kA CO100 times. The VFC series eddy current driving fast circuit breaker adopts a fast eddy current driving technology-based high-speed circuit breaker. The VFC series eddy current driving quick breaker has quick discharge switch with switching-off time less than 2ms and switching-on time less than 10 ms. A VFC series eddy current driving quick breaker charges a coil through capacitor energy storage, and controls the movement of an eddy current disc to realize quick switching-off and switching-on. Compared with the traditional circuit breaker, the quick switch is simpler and more reliable in structure, can realize switching-off operation within 11ms, can complete the switching from a main power supply to a standby power supply within 20ms, and is lower in action discreteness. Compared with a solid-state switch, the switch does not need power electronic devices to bear high voltage and overcurrent, the reliability of the switch is improved, and the cost is greatly reduced.
The current and voltage detection module measures the current of the power line in the cabinet body by adopting a Rogowski coil, has the advantages of large dynamic range and high measurement precision, and does not have the problem of magnetic saturation of an electromagnetic induction type current transformer; measuring voltage by using a Hall sensor; and a 16-bit high-speed and high-precision AD converter is adopted to realize high-resolution data acquisition.
The switching controller comprises a high-capacity FPGA and a 32-bit high-speed DSP, the switching controller specifically adopts a DSP controller TMS320F2808 and is responsible for control, switching, parallel algorithm processing and fault processing of the whole module, the consistency is good, the anti-interference capability is strong, strong operational capability is formed, and short-circuit current calculation, current zero crossing point prediction and voltage sag calculation are guaranteed to be completed within 3 ms.
The working logic of the fast switching unit is as follows:
when the power grid normally supplies power, the quick change-over switch is in a closed state, and normal working current flows through the quick change-over switch; when voltage sag occurs, the switching controller detects fault information and makes a judgment, a disconnection command is sent to the quick switching switch within 3ms, and the quick switching switch cuts off the sensitive load from the power grid within 2 ms; the switching controller sends a power supply command to the inverter device, and the inverter device supplies power to the load.
The inverter adopts a DC/DC-DC/AC link structure, and comprises: the input end of the EMI filter is connected with the energy storage battery, the output end of the EMI filter is connected with the input end of the LLC full-bridge resonant converter, and the output end of the LLC full-bridge resonant converter is connected with the input end of the plate bridge inverter circuit through the isolation output. Wherein the preceding stage DC/DC realizes the isolation of direct current input and alternating current output. The input direct current passes through the input EMI filter, then passes through the LLC full-bridge resonant converter to isolate and output direct current (plus or minus 380VDC) about 760V, and then passes through the half-bridge inverter circuit to convert the 760V direct current into 220V alternating current. The DC/DC conversion adopts LLC resonance soft switching technology, and the efficiency is more than 90%. A CPU is arranged in the inverter and is a DSP digital control panel; an LCD display is arranged on the inverter and connected with the DSP digital control board.
The working logic of the energy storage inversion unit is as follows:
when voltage dip or short-time fault occurs in the power grid, the energy stored by the energy storage battery is inverted into an AC220V power supply which is synchronous with the power grid through a DC/AC inverter, and the power sensitive load is supplied with power for a short time.
The energy storage battery is composed of a carbon-based capacitor battery pack, the capacity of a single battery is 1.3AH, the energy storage battery is composed of a plurality of series-parallel batteries, the single batteries do not need to be balanced, the cycle life reaches more than ten thousand times and is maintenance-free, the output can be directly short-circuited, the temperature characteristic is good, the service life is long, and the requirement of the system on 10kW/20min power supply time can be met.
The working principle of the voltage sag resistant device of the embodiment is as follows:
under the normal condition of a power grid, the electricity-consumption sensitive equipment is supplied with power by the power grid, and the device charges the energy storage battery through the power grid, and meanwhile, the output of the inverter is kept to be synchronous with the alternating current power supply (AC220V) of the power grid. When voltage sag or short-time fault occurs in a power grid, the switching controller rapidly diagnoses the fault, the switching controller immediately sends a switching instruction within 3ms, the rapid switching switch disconnects the electricity-using sensitive equipment from the power grid within 2ms, then the switching controller sends a power supply instruction to the inverter, the inverter supplies power to a load, and the longest power supply time can reach 20 min. And if the power grid power failure time exceeds 20min, stopping the machine. After the power grid is recovered to be normal, the switching controller continuously detects the voltage of the power grid for 180ms, if the voltage of the power grid is stably supplied with power, the switching controller sends out a switching instruction, and the quick switching switch is closed; at the moment, the inverter continuously detects the power grid voltage for 30s (the time can be set by self), the inverter starts to gradually adjust the output voltage, and after the output voltage of the inverter is synchronous with the power grid voltage, the inverter slowly retreats (when retreating, the load voltage has no fluctuation); the power is supplied to the load by the power grid, and meanwhile, the device charges the energy storage battery through the power grid.
The voltage sag resistant device is directly connected in series into a distribution line, and the interface is selected on the outlet side of an air switch of the distribution box. The voltage sag resistant device is provided with two input interfaces, and can be directly connected to the main air switch or a plurality of sub air switches according to the specific structure and the actual power protection range of the distribution box.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (10)
1. The voltage sag resistant device is characterized by comprising a cabinet body (1), wherein a quick switching unit, an energy storage inversion unit and an intelligent communication terminal are arranged in the cabinet body (1);
the energy storage inversion unit comprises: the energy storage battery is connected with the inverter, and the inverter is connected with a load; the inverter is used for converting the direct current of the energy storage battery into alternating current to supply power to a load;
the fast switching unit includes: the switching controller is respectively connected with the inverter and the fast switching switch, and the switching controller is used for controlling the fast switching switch and the inverter; the intelligent communication terminal is connected with the switching controller;
the instrument door of the cabinet body (1) is provided with a display (2), and the display (2) is connected with the switching controller.
2. The voltage sag prevention device according to claim 1, wherein the intelligent communication terminal is a 4G network communication device and is connected with the control background through a 4G network.
3. The apparatus of claim 1, wherein the inverter and the switching controller are each connected to a timing module.
4. The voltage sag prevention device according to claim 1, further comprising an alarm module, a current and voltage detection module, wherein the current and voltage detection module is used for detecting the voltage and current of a power line in the cabinet (1); the alarm module and the voltage and current detection module are respectively connected with the switching controller.
5. The voltage sag prevention device according to claim 1, wherein the inverter comprises: the input end of the EMI filter is connected with the energy storage battery, the output end of the EMI filter is connected with the input end of the LLC full-bridge resonant converter, and the output end of the LLC full-bridge resonant converter is connected with the input end of the plate bridge inverter circuit through the isolation output.
6. The voltage sag prevention device according to claim 1, wherein the inverter has a built-in CPU, and the CPU is a DSP digital control board; an LCD display is arranged on the inverter and connected with the DSP digital control board.
7. The voltage sag prevention device according to claim 1, wherein the cabinet (1) has a length, a width and a height of 800mm, 800mm and 1500mm, respectively.
8. The voltage sag prevention device according to claim 1, wherein the cabinet (1) is divided into an upper cabinet (11) and a lower cabinet (12); the display (2) is arranged on the outer side of the instrument door of the upper cabinet body (11), and the switching controller is arranged on the inner side of the instrument door; the intelligent communication terminal is arranged inside the upper cabinet body (11); the energy storage inversion unit and the quick change-over switch are arranged inside the lower cabinet body (12).
9. The apparatus according to claim 1, wherein the energy storage battery is a TMDD15/220 type capacitor battery.
10. The voltage sag prevention device according to claim 1, wherein the communication interface of the switching controller is an electrically isolated RS-485 communication interface; the communication interface of the inverter is one or more of RS 232/485/CAN/Ethernet interfaces.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021477565.6U CN212486130U (en) | 2020-07-23 | 2020-07-23 | Voltage sag resistant device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021477565.6U CN212486130U (en) | 2020-07-23 | 2020-07-23 | Voltage sag resistant device |
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| CN212486130U true CN212486130U (en) | 2021-02-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952987A (en) * | 2021-03-04 | 2021-06-11 | 江西赣锋锂电科技有限公司 | Energy storage control strategy for building fire safety standby power |
| CN113347824A (en) * | 2021-05-13 | 2021-09-03 | 国网内蒙古东部电力有限公司呼伦贝尔供电公司 | Multifunctional electrical test console |
-
2020
- 2020-07-23 CN CN202021477565.6U patent/CN212486130U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952987A (en) * | 2021-03-04 | 2021-06-11 | 江西赣锋锂电科技有限公司 | Energy storage control strategy for building fire safety standby power |
| CN113347824A (en) * | 2021-05-13 | 2021-09-03 | 国网内蒙古东部电力有限公司呼伦贝尔供电公司 | Multifunctional electrical test console |
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