Multifunctional direct current screen

Abstract

The utility model discloses a multifunctional direct-current screen, which relates to the field of direct-current power supplies in electric power engineering and comprises an inverter U3, an inverter alternating-current input switch QF3, an inverter direct-current input switch ZK1, a first inverter output switch NK1 and a second inverter output switch NK2. The inverter U3 is used for uninterruptedly outputting AC 220V; the alternating current input side of the inverter U3 is connected with a phase line C and a zero line N through an inverter alternating current input switch QF3; the direct current input side of the inverter U3 is connected with a 220V + positive bus and a 220V-negative bus through an inverter direct current input switch ZK1; and the alternating current output side of the inverter U3 is connected with a first inverter output switch NK1 and a second inverter output switch NK2. According to the utility model, the input cost is low, the output functions of different voltages of the direct current screen are enriched, the function expansion significance is strong, the construction, operation and maintenance and management work of field personnel are greatly facilitated, and the result can be obtained twice with half the effort.

Description

Technical Field

[0001] The utility model relates to the field of direct current power supply for electric power engineering, and in particular to a multifunctional direct current panel. Background Art

[0002] The statements in this section merely provide background art related to the present disclosure and do not necessarily constitute prior art.

[0003] In the power distribution room, the DC panel is generally used to provide DC operating voltage for the high-voltage cabinet. Conventional DC panels can only output one DC voltage such as DC110V, DC220V, etc., and have a single function. With the continuous development of the power industry, intelligent and automated equipment in distribution rooms are becoming more and more popular. Conventional DC panels have exposed disadvantages such as few application scenarios and poor adaptability. In addition, in the event of a city power failure or other emergency, it is often impossible to quickly and reliably switch to the backup power supply, thereby failing to meet the power requirements of the related equipment in use. In severe cases, this may cause damage to the equipment in use. The current existing technology requires the DC panel operator to always pay attention to the use status of the battery pack, and the charging and discharging process requires manual monitoring throughout the process, and the degree of automation is low. Utility Model Content

[0004] In view of the technical problems existing in the DC screens in the prior art, the utility model provides a multifunctional DC screen which, in addition to outputting the high-voltage cabinet operating voltage (such as DC220V), can also output voltages such as AC380V, AC220V, uninterrupted AC220V, and uninterrupted DC24V to adapt to different application scenarios.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A multifunctional DC panel, comprising: an inverter U3, an inverter AC input switch QF3, an inverter DC input switch ZK1, a first inverter output switch NK1, and a second inverter output switch NK2;

[0007] Inverter U3 is used for uninterrupted AC220V output;

[0008] The AC input side of the inverter U3 is connected to the phase line C and the neutral line N through the inverter AC input switch QF3;

[0009] The DC input side of the inverter U3 is connected to the 220V+ positive bus and the 220V- negative bus through the inverter DC input switch ZK1;

[0010] The AC output side of the inverter U3 is connected to the first inverter output switch NK1 and the second inverter output switch NK2.

[0011] Further, the DC panel also includes: a first switching power supply U4, a second switching power supply U5, a switching power supply input switch ZK2, a first switching power supply output switch DK1, and a second switching power supply output switch DK2;

[0012] The first switching power supply U4 and the second switching power supply U5 are used for DC-DC conversion;

[0013] The DC input sides of the first switching power supply U4 and the second switching power supply U5 are connected in parallel and then connected to the 220V+ positive bus and the 220V- negative bus through the switching power supply input switch ZK2;

[0014] The DC output side of the first switching power supply U4 is connected to the first switching power supply output switch DK1;

[0015] The DC output side of the second switching power supply U5 is connected to the second switching power supply output switch DK2.

[0016] Furthermore, the inverter AC input switch QF3 is used for switching on and off and protecting the inverter AC circuit;

[0017] The upper port of the inverter AC input switch QF3 is connected to the phase line C and the neutral line N;

[0018] The lower port of the inverter AC input switch QF3 is connected to the AC input side of the inverter U3.

[0019] Furthermore, the inverter DC input switch ZK1 is used for switching on and off and protecting the inverter DC circuit;

[0020] The upper port of the inverter DC input switch ZK1 is connected to the 220V+ positive bus and the 220V- negative bus;

[0021] The lower port of the inverter DC input switch ZK1 is connected to the DC input side of the inverter U3.

[0022] Furthermore, the switching power input switch ZK2 is used for switching the power input circuit on and off and protecting it;

[0023] The upper port of the switching power input switch ZK2 is connected to the 220V+ positive bus and the 220V- negative bus;

[0024] The lower port of the switching power input switch ZK2 is connected to the input sides of the first switching power U4 and the second switching power U5.

[0025] Furthermore, the DC panel further includes: a first AC output switch SK1, a second AC output switch SK2, and a third AC output switch SK3;

[0026] The first mains output switch SK1, the second mains output switch SK2, and the third mains output switch SK3 are used for AC380V and AC220V voltage feeding;

[0027] The first mains output switch SK1 is connected to the phase line A, the phase line B and the phase line C;

[0028] The second mains output switch SK2 is connected to the phase line A and the neutral line N;

[0029] The third AC output switch SK3 is connected to the phase line B and the neutral line N.

[0030] Furthermore, the first inverter output switch NK1 and the second inverter output switch NK2 are used for uninterrupted AC220V voltage feeding;

[0031] The upper ports of the first inverter output switch NK1 and the second inverter output switch NK2 are connected in parallel and connected to the output side of U3.

[0032] Further, the first switching power supply output switch DK1 and the second switching power supply output switch DK2 are used for uninterrupted DC12V and DC24V voltage feeding;

[0033] The first switching power supply output switch DK1 is connected to the output side of the first switching power supply U4;

[0034] The second switching power supply output switch DK2 is connected to the output side of the second switching power supply U5.

[0035] Further, the model of the inverter U3 is AC220V / 1kVA;

[0036] The model of the first switching power supply U4 is DC220V / DC12V, and the model of the second switching power supply U5 is DC220V / DC24V;

[0037] The model of the inverter AC input switch QF3 is 10A / 2P;

[0038] The model of the inverter DC input switch ZK1 is 10A / 2P DC;

[0039] The model of the switching power input switch ZK2 is 6A / 2P DC;

[0040] The model of the first AC output switch SK1 is 32A / 3P;

[0041] The models of the second AC output switch SK2 and the third AC output switch SK3 are 20A / 2P;

[0042] The model of inverter output switches NK1 and NK2 is 10A / 2P;

[0043] The models of the first switching power supply output switch DK1 and the second switching power supply output switch DK2 are 10A / 2P DC.

[0044] Compared with the prior art, the beneficial effects of the utility model are:

[0045] 1. The utility model expands the functions of conventional DC panels, integrates multiple power interfaces into one, meets the needs of various power interfaces on site, facilitates the construction and management of on-site personnel, and has strong adaptability.

[0046] 2. The multifunctional DC panel has the AC output function, which can output 1-way AC380V and 2-way AC220V voltage. This function is used for equipment that needs AC power in the power distribution room, and can also be used for temporary three-phase or single-phase maintenance power supply connection.

[0047] 3. The multifunctional DC panel has the function of uninterrupted AC output, which can output 2 uninterrupted AC220V voltage. This function can be used for important loads such as emergency lighting, network equipment, and communication equipment in the power distribution room.

[0048] 4. The multifunctional DC panel has the function of uninterrupted DC low voltage output, which can output 1 uninterrupted DC12V voltage and 1 uninterrupted DC24V voltage. This function can be used to power various display screens, sensors, controllers, I / O modules and other intelligent devices in the power distribution room.

[0049] 5. The multifunctional DC panel provides an emergency backup power supply. When the mains power supply is interrupted, the emergency backup power supply will automatically start and switch to the backup power supply in time to provide power guarantee for the equipment in the distribution room.

[0050] 6. The multifunctional DC panel can also be used to control and monitor the energy storage and release of the battery pack in the DC panel. When the mains power supply is interrupted and the emergency backup power supply is not working, the normal operation of other modules and equipment can still be guaranteed by releasing the reserve power of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0052] Figure 1 A circuit schematic diagram of a multifunctional DC panel provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0053] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0054] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0055] In this utility model, terms such as "connection" should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meaning of the above terms in this utility model can be determined according to specific circumstances, and it cannot be understood as a limitation of this utility model.

[0056] Here, it is necessary to explain that the multifunctional DC panel disclosed in this application is based on the conventional DC panel, and some new functions have been expanded. The basic principle of the DC panel has not been changed. This utility model only explains the improved part, that is, Figure 1 The part in the box. This article will not elaborate on the configuration and principle of the conventional DC panel, but only briefly mention it, namely: the conventional DC panel generally includes AC incoming line switches QF1, QF2; dual power supply switch ATS; surge protector SPD; charging modules U1, U2; step-down silicon chain GL; shunts FL1, FL2; ammeters PA1, PA2; voltmeters PV1, PV2; battery pack BAT1; battery pack switch CK1; discharge test switch FK1; closing mother output switches HK1~HK4; and controlling mother output switches KK1~KK4.

[0057] like Figure 1 As shown, a multifunctional DC panel includes: an inverter U3, an inverter AC input switch QF3, an inverter DC input switch ZK1, a first inverter output switch NK1, and a second inverter output switch NK2;

[0058] Inverter U3 is used for uninterrupted AC220V output; the AC input side of inverter U3 is connected to phase line C and neutral line N through inverter AC input switch QF3; the DC input side of inverter U3 is connected to 220V+ positive bus and 220V- negative bus through inverter DC input switch ZK1; the AC output side of inverter U3 is connected to the first inverter output switch NK1 and the second inverter output switch NK2.

[0059] The multifunctional DC panel also includes: a first switching power supply U4, a second switching power supply U5, a switching power supply input switch ZK2, a first switching power supply output switch DK1, and a second switching power supply output switch DK2;

[0060] The first switching power supply U4 and the second switching power supply U5 are used for DC-DC conversion; the DC input sides of the first switching power supply U4 and the second switching power supply U5 are connected in parallel and connected to the 220V+ positive bus and the 220V- negative bus through the switching power supply input switch ZK2; the DC output side of the first switching power supply U4 is connected to the first switching power supply output switch DK1; the DC output side of the second switching power supply U5 is connected to the second switching power supply output switch DK2.

[0061] The inverter AC input switch QF3 is used for switching on and off and protecting the inverter AC circuit;

[0062] The upper port of the inverter AC input switch QF3 is connected to the phase line C and the neutral line N; the lower port of the inverter AC input switch QF3 is connected to the AC input side of the inverter U3.

[0063] The inverter DC input switch ZK1 is used for the on / off and protection of the inverter DC circuit; the upper port of the inverter DC input switch ZK1 is connected to the 220V+ positive bus and the 220V- negative bus;

[0064] The lower port of the inverter DC input switch ZK1 is connected to the DC input side of the inverter U3.

[0065] The switching power input switch ZK2 is used for switching the power input circuit on and off and protecting it;

[0066] The upper port of the switching power input switch ZK2 is connected to the 220V+ positive bus and the 220V- negative bus;

[0067] The lower port of the switching power input switch ZK2 is connected to the input sides of the first switching power U4 and the second switching power U5.

[0068] The multifunctional DC panel further comprises: a first AC output switch SK1, a second AC output switch SK2, and a third AC output switch SK3;

[0069] The first mains power output switch SK1, the second mains power output switch SK2, and the third mains power output switch SK3 are used for AC380V and AC220V voltage feeding; the first mains power output switch SK1 is connected to phase line A, phase line B, and phase line C; the second mains power output switch SK2 is connected to phase line A and neutral line N; the third mains power output switch SK3 is connected to phase line B and neutral line N.

[0070] The first inverter output switch NK1 and the second inverter output switch NK2 are used for uninterrupted AC220V voltage feeding;

[0071] The upper ports of the first inverter output switch NK1 and the second inverter output switch NK2 are connected in parallel and connected to the output side of U3.

[0072] The first switching power supply output switch DK1 and the second switching power supply output switch DK2 are used for uninterrupted DC12V and DC24V voltage feeding;

[0073] The first switching power supply output switch DK1 is connected to the output side of the first switching power supply U4 ; the second switching power supply output switch DK2 is connected to the output side of the second switching power supply U5 .

[0074] The model of inverter U3 is AC220V / 1kVA;

[0075] The model of the first switching power supply U4 is DC220V / DC12V, and the model of the second switching power supply U5 is DC220V / DC24V;

[0076] The model of the inverter AC input switch QF3 is 10A / 2P;

[0077] The model of the inverter DC input switch ZK1 is 10A / 2P DC;

[0078] The model of the switching power input switch ZK2 is 6A / 2P DC;

[0079] The model of the first AC output switch SK1 is 32A / 3P;

[0080] The models of the second AC output switch SK2 and the third AC output switch SK3 are 20A / 2P;

[0081] The model of inverter output switches NK1 and NK2 is 10A / 2P;

[0082] The models of the first switching power supply output switch DK1 and the second switching power supply output switch DK2 are 10A / 2P DC.

[0083] The multifunctional DC panel also includes: a dual power supply switch ATS, a first AC incoming line switch QF1 and a second AC incoming line switch QF2;

[0084] The dual power supply switch ATS, the first AC incoming line switch QF1 and the second AC incoming line switch QF2 are used to provide emergency backup power supply;

[0085] The first AC incoming line switch QF1 and the second AC incoming line switch QF2 are connected to the phase line A, the phase line B, the phase line C and the neutral line N through the dual power supply switch ATS.

[0086] The multifunctional DC panel also includes: a shunt FL1, an ammeter PA1, a voltmeter PV1, a charging switch CK1, a discharging switch FK1, and a battery pack BAT1;

[0087] The shunt FL1, ammeter PA1, voltmeter PV1, charging switch CK1, discharging switch FK1 and battery pack BAT1 are used to control and detect the energy storage and release of the battery pack in the DC panel. The battery pack BAT1 is connected to the 220V+ positive bus and the 220V- negative bus through the charging switch CK1.

[0088] Implementation Notes:

[0089] 1. This multifunctional DC panel has AC power output function, and can output 1 AC380V and 2 AC220V voltages.

[0090] The AC output switches SK1, SK2, and SK3 are connected to the AC busbar (AC power). Switch SK1 can output three-phase AC380V voltage, and switches SK2 and SK3 can output single-phase AC220V voltage. This function is used for equipment that requires AC power in the distribution room, and can also be used for temporary three-phase or single-phase maintenance power supply connection.

[0091] 2. This multifunctional DC panel has uninterrupted AC output function and can output 2 channels of uninterrupted AC220V voltage.

[0092] Inverter U3 has two power inputs, one connected to the AC bus (mains) through switch QF3, and the other connected to the DC bus through switch ZK1. The inverter output is connected to two switches NK1 and NK2. Under normal circumstances, the inverter load is powered by the mains bypass. When the mains fails, the inverter is powered by the DC bus to ensure that important AC loads continue to be powered. The inverter's uninterrupted AC220V output can be used for important loads such as emergency lighting, network equipment, and communication devices in the distribution room.

[0093] 3. The multifunctional DC panel has the function of uninterrupted DC low voltage output, which can output 1 uninterrupted DC12V voltage and 1 uninterrupted DC24V voltage.

[0094] U4 and U5 are DC-DC conversion switching power supplies. The input side is connected to the DC bus through switch ZK2, and the output side is connected to switches DK1 and DK2. The intelligentization of power distribution rooms is becoming more and more mature. Many components of intelligent systems, such as display screens, sensors, controllers, I / O modules, etc., require external low-voltage DC power supplies, such as DC12V, DC24V, etc. The DC panel can provide uninterrupted low-voltage DC power supply, which is very beneficial for field communication equipment to continue uploading relevant data after the city power outage.

[0095] The above is an analysis of the extended functions of a multifunctional DC panel. Through the analysis, we know that the multifunctional DC panel described in the utility model has comprehensive functions and strong adaptability. It has the functions of three-phase and single-phase AC output of the mains power; it has the function of uninterrupted single-phase voltage output; it has multiple DC low voltage output functions.

[0096] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A multifunctional DC panel, characterized in that: The DC panel includes: an inverter U3, an inverter AC input switch QF3, an inverter DC input switch ZK1, a first inverter output switch NK1, and a second inverter output switch NK2; The inverter U3 is used for uninterrupted AC220V output; The AC input side of the inverter U3 is connected to the phase line C and the neutral line N through the inverter AC input switch QF3; The DC input side of the inverter U3 is connected to the 220V+ positive bus and the 220V- negative bus through the inverter DC input switch ZK1; The AC output side of the inverter U3 is connected to the first inverter output switch NK1 and the second inverter output switch NK2.

2. The multifunctional DC panel according to claim 1, characterized in that: The DC panel also includes: a first switching power supply U4, a second switching power supply U5, a switching power supply input switch ZK2, a first switching power supply output switch DK1, and a second switching power supply output switch DK2; The first switching power supply U4 and the second switching power supply U5 are used for DC-DC conversion; The DC input sides of the first switching power supply U4 and the second switching power supply U5 are connected in parallel and connected to the 220V+ positive bus and the 220V- negative bus through the switching power supply input switch ZK2; The DC output side of the first switching power supply U4 is connected to the first switching power supply output switch DK1; The DC output side of the second switching power supply U5 is connected to the second switching power supply output switch DK2.

3. The multifunctional DC panel according to claim 1, characterized in that: The inverter AC input switch QF3 is used for switching on and off and protecting the inverter AC circuit; The upper port of the inverter AC input switch QF3 is connected to the phase line C and the neutral line N; The lower port of the inverter AC input switch QF3 is connected to the AC input side of the inverter U3.

4. The multifunctional DC panel according to claim 1, characterized in that: The inverter DC input switch ZK1 is used for switching on and off and protecting the inverter DC circuit; The upper port of the inverter DC input switch ZK1 is connected to the 220V+ positive bus and the 220V- negative bus; The lower port of the inverter DC input switch ZK1 is connected to the DC input side of the inverter U3.

5. The multifunctional DC panel according to claim 2, characterized in that: The switching power input switch ZK2 is used for switching the power input circuit on and off and protecting it; The upper port of the switching power input switch ZK2 is connected to the 220V+ positive bus and the 220V- negative bus; The lower port of the switching power input switch ZK2 is connected to the input sides of the first switching power supply U4 and the second switching power supply U5.

6. The multifunctional DC panel according to claim 2, characterized in that: The DC panel also includes: a first AC output switch SK1, a second AC output switch SK2, and a third AC output switch SK3; The first mains power output switch SK1, the second mains power output switch SK2, and the third mains power output switch SK3 are used for AC380V and AC220V voltage feeding; The first mains power output switch SK1 is connected to phase line A, phase line B and phase line C; The second mains output switch SK2 is connected to the phase line A and the neutral line N; The third AC output switch SK3 is connected to the phase line B and the neutral line N.

7. The multifunctional DC panel according to claim 1, characterized in that: The first inverter output switch NK1 and the second inverter output switch NK2 are used for uninterrupted AC220V voltage feeding; The upper ports of the first inverter output switch NK1 and the second inverter output switch NK2 are connected in parallel and connected to the output side of U3.

8. The multifunctional DC panel according to claim 2, characterized in that: The first switching power supply output switch DK1 and the second switching power supply output switch DK2 are used for uninterrupted DC12V and DC24V voltage feeding; The first switching power supply output switch DK1 is connected to the output side of the first switching power supply U4; The second switching power supply output switch DK2 is connected to the output side of the second switching power supply U5.

9. The multifunctional DC panel according to claim 6, characterized in that: The model of the inverter U3 is AC220V / 1kVA; The model of the first switching power supply U4 is DC220V / DC12V, and the model of the second switching power supply U5 is DC220V / DC24V; The model of the inverter AC input switch QF3 is 10A / 2P; The model of the inverter DC input switch ZK1 is 10A / 2P DC; The model of the switching power input switch ZK2 is 6A / 2P DC; The model of the first AC output switch SK1 is 32A / 3P; The models of the second mains power output switch SK2 and the third mains power output switch SK3 are 20A / 2P; The model of the inverter output switches NK1 and NK2 is 10A / 2P; The models of the first switching power supply output switch DK1 and the second switching power supply output switch DK2 are 10A / 2P DC.

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