A zero flash power protection device

Abstract

The application discloses a zero flash power supply device, which comprises a cabinet body, a double-line incoming line interface arranged on a first side of the cabinet body, a multi-line outgoing line interface arranged on a second side of the cabinet body, the first side and the second side being opposite sides, a display screen arranged on a third side of the cabinet body, a power supply switching module arranged in the cabinet body, a double-line incoming line unit corresponding to the double-line incoming line interface, an incoming line protection unit connected with the double-line incoming line unit, a multi-line outgoing line unit corresponding to the multi-line outgoing line interface, an outgoing line protection unit connected with the multi-line outgoing line unit, a switching unit connected with the double-line incoming line unit and the outgoing line protection unit, and a PLC control unit connected with the incoming line protection unit, the outgoing line protection unit, the switching unit and the display screen. The zero flash power supply device realizes zero flash switching and high reliability operation of a power supply system.

Description

Technical Field

[0001] This application relates to the field of power protection technology, and in particular to a zero-flicker power protection device. Background Technology

[0002] Major social events (such as international conferences, sporting events, performances, etc.) have extremely high requirements for the continuity of power supply. The switching time of traditional ATS (Automatic Transfer Switch) is usually 50ms to 200ms, which may cause sensitive equipment to restart or data to be lost.

[0003] Existing power supply solutions also rely on multi-level redundancy (such as UPS + generator), which is complex, costly, and has complicated wiring. When emergency power vehicles are connected, manual operation is required, resulting in low efficiency.

[0004] In addition, there are problems such as voltage dips and phase asynchrony when switching between mains power and emergency power, which can easily cause flickering at the load end. Utility Model Content

[0005] An embodiment of this application provides a zero-flicker power-saving device.

[0006] To achieve the above objectives, embodiments of this application provide a zero-flicker power-saving device, comprising:

[0007] The cabinet has a dual-inlet interface on the first side and a multi-outlet interface on the second side. The first and second sides are opposite to each other. The third side of the cabinet has a display screen. The cabinet also has a power switching module inside.

[0008] The power switching module includes:

[0009] Dual-path incoming line unit, the dual-path incoming line unit is connected to the corresponding dual-path incoming line interface;

[0010] Incoming line protection unit, which is connected to dual-incoming line unit;

[0011] A multi-outgoing line unit, which is connected to a corresponding multi-outgoing line interface;

[0012] Outgoing line protection unit, which is connected to the multi-outgoing line unit;

[0013] The switching unit is connected to both the dual-incoming-line unit and the outgoing-line protection unit.

[0014] The PLC control unit is connected to the incoming line protection unit, the outgoing line protection unit, the switching unit, and the display screen.

[0015] In one embodiment, the outgoing line protection unit includes: an outgoing line circuit breaker;

[0016] Each outgoing line unit in the multi-outgoing line unit is equipped with an outgoing line circuit breaker.

[0017] In one embodiment, the outgoing line protection unit further includes: a surge protector;

[0018] Each outgoing circuit breaker is connected to a surge protector in relation to its corresponding multi-outgoing unit.

[0019] In one embodiment, the incoming line protection unit includes: an incoming line circuit breaker;

[0020] Each incoming line unit in the dual-incoming-line unit is equipped with an incoming line circuit breaker.

[0021] In one embodiment, the power switching module further includes a voltage transformer;

[0022] The voltage transformer is connected to both the PLC control unit and the dual-input unit.

[0023] In one embodiment, the power switching module further includes a current transformer;

[0024] The current transformer is connected to the PLC control unit and the multi-channel output unit respectively.

[0025] In one embodiment, a leakage protection unit is also provided on the cabinet.

[0026] In one embodiment, a fan is provided at the bottom of the cabinet.

[0027] Compared with the prior art, this application has the following advantages: the solution realizes zero-flicker switching and high-reliability operation of the power supply system, and is particularly suitable for industrial scenarios that are sensitive to power quality. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the zero-flicker power-saving device according to an embodiment of this application;

[0030] Figure 2 This is a right view of the zero-flicker power-saving device according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the power switching module in the zero-flicker power protection device of this application embodiment. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] Reference Figure 1-3 The embodiments of this application provide a zero-flicker power-saving device, comprising:

[0037] Cabinet 1 has a dual-inlet interface 11 on its first side and a multi-outlet interface 12 on its second side. The first and second sides are opposite to each other. A display screen 13 is installed on the third side of cabinet 1. A power switching module 14 is installed inside cabinet 1.

[0038] The power switching module 14 includes:

[0039] Dual-path incoming line unit 141, which is connected to dual-path incoming line interface 11;

[0040] Incoming line protection unit 142 is connected to dual-incoming line unit 141;

[0041] Multi-line output unit 143, which is connected to the multi-line output interface 12.

[0042] Outgoing line protection unit 144 is connected to multi-outgoing line unit 143;

[0043] Switching unit 145 is connected to dual-input line unit 141 and output line protection unit 144 respectively;

[0044] The PLC control unit 146 is connected to the incoming line protection unit 142, the outgoing line protection unit 144, the switching unit 145, and the display screen 13.

[0045] Specifically, cabinet 1 can have an IP42 protection rating, with a dustproof and drip-proof design. It should be equipped with an independent grounding copper busbar, using a TN-S system, with a grounding copper busbar cross-sectional area ≥50mm². 2 The grounding resistance is ≤0.5Ω (independent grounding electrode). The incoming and outgoing cables on cabinet 1 are also sealed.

[0046] Of the 11 dual-input interfaces, one is the main power input interface, and the other is the backup power input interface. The main and backup power supplies are determined based on the actual usage scenario. For example, both power supplies can be independent three-phase 380V±10% / 125A power supplies with a frequency of 50Hz and an allowable phase difference of ≤5°. The input cable specification can be 4×50mm. 2 Copper cable (125A current carrying capacity, temperature rise ≤40K).

[0047] The number of multi-outlet interfaces (12) can be set according to actual needs, such as three-outlet interfaces. The rated current specifications of the three outlets can also be set according to actual needs, for example, the rated currents of the three outlets are 100A, 63A, and 32A respectively. Through differentiated branch design, it can adapt to electrical equipment with different power levels, avoid overload risks, and optimize system cost and space occupation.

[0048] The display screen 13 can be a touch screen for real-time display of switching status, etc.

[0049] The power switching module 14 is used to switch to the backup power supply within 10ms when the main power supply fails, so as to achieve zero-flicker power switching.

[0050] Among them, the incoming line protection unit 142 is used to protect the safety of the incoming line side, i.e., the main power supply or the backup power supply side, and to prevent short circuits, overloads, etc., that is, to provide short circuit and overload protection for the incoming line side.

[0051] In one embodiment, the incoming line protection unit 142 includes an incoming line circuit breaker; each incoming line unit in the dual-incoming line unit 141 is equipped with an incoming line circuit breaker.

[0052] Specifically, when a short-circuit fault occurs on the incoming line side, the incoming line circuit breaker trips instantaneously (usually ≤20ms) to prevent the fault current from impacting the equipment inside the cabinet. For example, if a phase-to-phase short circuit occurs due to insulation damage in the main power supply cable, the incoming line circuit breaker trips to isolate the fault point.

[0053] When the power line is overloaded or the upstream power equipment is overloaded for a long period of time, such as when the current continuously exceeds 1.2 times the rated value, the incoming circuit breaker will disconnect to protect the cables and switching devices from overheating damage.

[0054] During maintenance, the incoming circuit breaker can also be manually disconnected to ensure complete power isolation during maintenance.

[0055] For example, the incoming line circuit breaker can be model CDM3S-125A, with a rated current of 125A, electrically operated, AC220V control power supply, and a mechanical life of ≥10,000 cycles.

[0056] Among them, the outgoing line protection unit 144 is used to protect branch lines and terminal equipment from local overload.

[0057] In one embodiment, the outgoing line protection unit 144 includes: an outgoing line circuit breaker 1441;

[0058] Each outgoing line unit in the multi-outgoing line unit 143 is equipped with an outgoing line circuit breaker 1441.

[0059] Specifically, when a branch circuit cable connected to a specific load is overloaded, the outgoing circuit breaker 1441 disconnects to protect each branch cable.

[0060] When the load device is overloaded, disconnect the outgoing circuit breaker 1441 of the corresponding branch to protect the single load device.

[0061] For example, the outgoing circuit breaker 1441 adopts the CDM3S series. The corresponding outgoing circuit breaker 1441 is selected according to the rated current of each outgoing interface. For example, the outgoing circuit breaker 1441 No. 1 is CDM3S-100A with a breaking capacity of 25kA; the outgoing circuit breaker 1441 No. 2 is CDM3S-63A with a breaking capacity of 18kA; and the outgoing circuit breaker 1441 No. 3 is CDM3S-32A with a breaking capacity of 10kA.

[0062] In one embodiment, the outgoing line protection unit 144 further includes a surge protector 1442;

[0063] Each outgoing circuit breaker 1441 is connected to a surge protector 1442 between itself and the corresponding multi-outgoing unit 143.

[0064] Specifically, surge protector 1442 can suppress transient overvoltages to protect downstream overloads, and can also discharge energy to prevent equipment insulation breakdown. Surge protector 1442 is responsible for microsecond-level transient protection, while outgoing circuit breaker 1441 is responsible for millisecond-level overcurrent / short-circuit protection, thus forming a complementary relationship in the time dimension.

[0065] To protect the outgoing circuit breaker 1441, a surge protector 1442 is installed on the load side of the outgoing circuit breaker 1441.

[0066] Understandably, a single surge protector 1442 can be connected after each outgoing circuit breaker 1441, or multiple outgoing circuit breakers 1441 can share one surge protector 1442 to save space.

[0067] For example, surge protector 1442 can be DZ47sY-II, with a nominal discharge current of 20kA, a maximum discharge current of 40kA, and a response time of ≤25ns.

[0068] The switching unit 145 can be a static switch, for example, model SYP-STS-400A, with a switching time of ≤10ms (using IGBT semiconductor devices and zero-current switching technology), input / output of 380V / 125A, short-circuit current withstand of 50kA / 1s, and communication interface of RS485 (Modbus RTU).

[0069] In one embodiment, the cabinet 1 is also equipped with a leakage current protection unit to prevent grounding faults.

[0070] A four-level protection system can be formed by setting up an incoming circuit breaker, an outgoing circuit breaker 1441, a surge protector 1442, and a leakage protection unit.

[0071] In one embodiment, the power switching module 14 further includes a voltage transformer 147; the voltage transformer 147 is connected to the PLC control unit 146 and the dual-input unit 141 respectively.

[0072] Specifically, the output signal of voltage transformer 147 is connected to the PLC analog input module.

[0073] The voltage transformer 147 is used to collect parameters such as voltage amplitude, frequency, and phase angle on the incoming line side and send them to the PLC control unit 146 so that the PLC control unit 146 can detect whether the voltage on the incoming line side is within the range of 380V±10% and whether the frequency is stable at 50Hz±0.5Hz.

[0074] Understandably, each incoming line unit in the dual-incoming-line unit 141 is connected to a voltage transformer 147.

[0075] For example, the voltage transformer 147 can be CDBS-C, with an input of 0-100A / 63A / 32A, an output of 4-20mA, a load impedance of ≤250Ω, a transformation ratio of 380V / 5V, and an accuracy of 0.5 class.

[0076] In one embodiment, the power switching module 14 further includes a current transformer 148; the current transformer 148 is connected to the PLC control unit 146 and the multi-output unit 143 respectively.

[0077] Specifically, the current transformer 148 is used to collect the effective value of the current of each outgoing line on the outgoing side and send it to the PLC control unit 146 so that the PLC control unit 146 can determine whether there is an overload or short circuit.

[0078] Understandably, each outgoing unit in the multi-outgoing unit 143 is connected to a current transformer 148. Alternatively, each phase of each outgoing unit can be connected to a current transformer 148 to accurately monitor various load currents, detect three-phase imbalance, or provide phase overload or short-circuit protection.

[0079] For example, the current transformer 148 can be a CDBS-C type, with an input of 0-100A / 63A / 32A, an output of 4-20mA, and a load impedance of ≤250Ω. The turns ratios are: 100A / 5A (outgoing line 1), 63A / 5A (outgoing line 2), and 32A / 5A (outgoing line 3), with an accuracy class of 0.5.

[0080] Understandably, the aforementioned display screen 13 can also display the three-phase voltage and the three-phase current of each outgoing line, as well as the opening and closing status of each incoming circuit breaker and outgoing circuit breaker 1441.

[0081] In one embodiment, a fan is installed at the bottom of the cabinet 1. This allows for heat dissipation from the interior of the cabinet 1.

[0082] It is understood that the zero-flicker power protection device provided in the above embodiments can also reserve expansion interfaces such as adding energy storage modules or grid-connected inverters, which can be adapted to future energy management needs.

[0083] It is also understandable that alarm thresholds can be set for this flicker-free power protection device, such as overvoltage (≥440V), undervoltage (≤320V), and overcurrent (110% of rated current for 10s). When the alarm threshold is exceeded, an alarm can be displayed on the display screen 13.

[0084] It is understandable that the bottom of the cabinet 1 of the zero-flicker power protection device can be equipped with wheels for easy movement, and a handle can also be installed on the cabinet 1 for easy operation.

[0085] The zero-flicker power protection device provided in this application embodiment uses a voltage transformer 147 to detect the voltage, frequency, and phase data of the dual-input unit 141 in real time, and a current sensor to monitor the current data of each output circuit and transmit these data to the PLC control unit 146. When the PLC detects that the main power supply side voltage is abnormal, the frequency exceeds the limit, or there is a power failure, it switches to the backup power supply through the switching unit 145.

[0086] The zero-flicker power protection device provided in this application embodiment can be applied to scenarios where power outages are unavoidable, such as data centers, hospital operating rooms, and semiconductor production lines.

[0087] The zero-flicker power protection device provided in this application embodiment realizes zero-flicker switching and high-reliability operation of the power supply system, and is particularly suitable for industrial scenarios that are sensitive to power quality.

[0088] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A zero-flicker power protection device, characterized in that, include: Cabinet (1), the first side of the cabinet (1) is provided with a dual-inlet interface (11), the second side of the cabinet (1) is provided with a multi-outlet interface (12), the first side and the second side are opposite sides; the third side of the cabinet (1) is provided with a display screen (13); the inside of the cabinet (1) is provided with a power switching module (14). The power switching module (14) includes: Dual-path inlet unit (141), wherein the dual-path inlet unit (141) is connected to the dual-path inlet interface (11); An incoming line protection unit (142) is connected to the dual-incoming line unit (141); A multi-outgoing line unit (143) is connected to the multi-outgoing line interface (12); Outgoing line protection unit (144), which is connected to the multi-outgoing line unit (143); A switching unit (145) is connected to the dual-input line unit (141) and the output line protection unit (144) respectively; The PLC control unit (146) is connected to the incoming line protection unit (142), the outgoing line protection unit (144), the switching unit (145), and the display screen (13).

2. The zero-flicker power-saving device according to claim 1, characterized in that, The outgoing line protection unit (144) includes: an outgoing line circuit breaker (1441); Each outgoing line unit (143) is equipped with the outgoing line circuit breaker (1441).

3. The zero-flicker power-saving device according to claim 2, characterized in that, The outgoing line protection unit (144) further includes: a surge protector (1442); Each of the outgoing circuit breakers (1441) is connected to the surge protector (1442) between it and the corresponding multi-outgoing unit (143).

4. The zero-flicker power-saving device according to claim 1, characterized in that, The incoming line protection unit (142) includes: an incoming line circuit breaker; Each of the dual incoming line units (141) is equipped with the incoming line circuit breaker.

5. The zero-flicker power-saving device according to claim 1, characterized in that, The power switching module (14) also includes a voltage transformer (147); The voltage transformer (147) is connected to the PLC control unit (146) and the dual-input unit (141) respectively.

6. The zero-flicker power-saving device according to claim 1, characterized in that, The power switching module (14) also includes a current transformer (148); The current transformer (148) is connected to the PLC control unit (146) and the multi-line output unit (143) respectively.

7. The zero-flicker power-saving device according to claim 1, characterized in that, The cabinet (1) is also equipped with a leakage protection unit.

8. The zero-flicker power-saving device according to claim 1, characterized in that, A fan is installed at the bottom of the cabinet (1).

Images