Intelligent electric power direct-current power supply system

Abstract

The utility model provides an intelligent electric power DC power supply system comprising an AC path A and an AC path B. The AC path A and the AC path B are respectively connected with a charging unit A and a charging unit B. The charging unit A and the charging unit B are connected with the same AC switching module. The storage battery pack supplies power to the load B, and the super capacitor bank supplies power to the load A. The loads are grouped according to the power supply stability requirements, the super capacitor bank and the storage battery pack are used for supplying power to the different loads, and due to the fact that super capacitors have the advantages of being short in charging time, long in service life, good in temperature characteristic, capable of saving energy, environmentally friendly and the like, the super capacitor bank is used for providing power supply guarantee for the A load; and the power supply stability of the A load can be greatly improved. And meanwhile, the working pressure of the storage battery pack can be reduced, so that the direct-current power supply system is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of DC power supplies, in particular to an intelligent power DC power supply system. Background Technique

[0002] The intelligent power DC power supply system is a power solution integrating modern technologies and innovative concepts, aiming to improve the safety, reliability, and intelligent level of the power system. The intelligent power DC power supply system provides necessary power support for relay protection, equipment automation control, etc. It combines AC power and DC power to achieve integrated AC-DC operation and ensure the scientific reliability of the power supply system.

[0003] In the prior art, once some loads are powered off, huge losses will be caused. To ensure the reliability of the power supply for these loads, an uninterruptible power supply (UPS) is configured at the front end of the power supply device. However, through actual inspection, it is found that in the power supply device equipped with a UPS, due to the series connection of loads, single-point failures are likely to occur, and there is still a situation of power supply interruption, which cannot meet the requirements for the power supply reliability of this type. Therefore, an intelligent power DC power supply system is proposed for improvement. Content of the Utility Model

[0004] The purpose of the utility model aims to solve at least one of the above technical defects.

[0005] For this reason, an object of the utility model is to propose an intelligent power DC power supply system to solve the problems mentioned in the background technique and overcome the deficiencies existing in the prior art.

[0006] To achieve the above object, an embodiment of one aspect of the utility model provides an intelligent power DC power supply system, including an AC circuit A and an AC circuit B. The AC circuit A and the AC circuit B are respectively connected with a charging unit A and a charging unit B. The charging unit A and the charging unit B are connected with the same AC switching module. The AC switching module is connected with an AC-DC converter. The AC-DC converter is connected with a DC bus. The DC bus is connected with a DC switching module A and a DC switching module B. The DC switching module A and the DC switching module B are respectively connected with a load A and a load B;

[0007] The AC-DC converter is further connected with a battery pack and a super capacitor bank. The battery pack is connected with the DC switching module B, and the super capacitor bank is connected with the DC switching module A.

[0008] Preferably, any of the above solutions, the AC circuit A and the charging unit A form a charging branch, and the AC circuit B and the charging unit B form a charging branch. The two charging branches are redundant lines for each other.

[0009] Adopt the above technical solution: The AC A path and the AC B path cooperate to provide two AC input lines for the DC power supply system. The two are redundant with each other and can work alternately when needed. The two lines respectively correspond to two charging units: Charging Unit A and Charging Unit B, both of which are used to charge the energy storage components. The AC switching module can switch the AC lines to switch the AC A path or the AC B path to supply power to the system. The AC-DC converter is used to convert AC into DC for the subsequent loads to use. The DC bus provides the DC power with the highest priority for the loads to use.

[0010] Preferably, according to any of the above solutions, the A load includes a system control circuit, a closing motor, and a dashboard, and the B load includes a lighting circuit and a heat dissipation circuit.

[0011] Adopt the above technical solution: The A load is mainly some loads with high requirements for power supply stability. When faced with a power outage, such loads often cause irreparable losses. Therefore, such loads are separately taken out for separate power supply to improve the power supply stability for such loads. The B load is some loads with low requirements for power supply stability. Such loads will not face any losses during a power outage and do not need to be separately guaranteed for power supply stability.

[0012] Preferably, according to any of the above solutions, the super capacitor bank can be one or more. When there are multiple super capacitor banks, they are connected to several A loads one-to-one.

[0013] Adopt the above technical solution: Super capacitors have the characteristics of short charging time, long service life, good temperature characteristics, energy saving, and environmental friendliness. Using the super capacitor bank to provide power supply guarantee for the A load can greatly improve the power supply stability of the A load. At the same time, it can also reduce the working pressure of the battery bank. In addition, when the budget is sufficient or the demand for power supply stability is extremely high, multiple super capacitor banks can also be set up to supply power to multiple A loads one-to-one to further improve the power supply stability.

[0014] Compared with the prior art, the advantages and beneficial effects of the present utility model are as follows:

[0015] This intelligent power DC power supply system is configured with AC / DC converters, a DC bus, Load A, Load B, a supercapacitor bank, and a battery bank. When powered by AC, the battery bank and the supercapacitor bank are charged. When there is a problem with the AC power supply, the battery bank powers Load B, and the supercapacitor bank powers Load A. The loads are grouped according to their different requirements for power supply stability, and the supercapacitor bank and the battery bank are used to supply power to different loads respectively. Since supercapacitors have the characteristics of short charging time, long service life, good temperature characteristics, energy conservation, and environmental friendliness, using the supercapacitor bank to provide power supply guarantee for Load A can greatly improve the power supply stability of Load A. At the same time, it can also reduce the working pressure of the battery bank, making the DC power supply system more stable and reliable.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of a partial structure of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0021] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figures 1-2As shown in the figure, the utility model includes an AC circuit A and an AC circuit B. The AC circuit A and the AC circuit B are respectively connected with a charging unit A and a charging unit B. The charging unit A and the charging unit B are connected with the same AC switching module. The AC switching module is connected with an AC / DC converter. The AC / DC converter is connected with a DC bus. The DC bus is connected with a DC switching module A and a DC switching module B. The DC switching module A and the DC switching module B are respectively connected with a load A and a load B;

[0023] The AC / DC converter is also connected with a battery pack and a super capacitor bank. The battery pack is connected with the DC switching module B, and the super capacitor bank is connected with the DC switching module A.

[0024] Embodiment 1: The AC circuit A and the charging unit A form a charging branch, and the AC circuit B and the charging unit B form a charging branch. The two charging branches are redundant lines with each other. The AC circuit A and the AC circuit B cooperate to provide two AC input lines for the DC power supply system. The two are redundant with each other and can work alternately when needed. The two lines respectively correspond to two charging units: the charging unit A and the charging unit B, both of which are used to charge the energy storage components. The AC switching module can switch the AC lines to switch the AC circuit A or the AC circuit B to supply power to the system. The AC / DC converter is used to convert AC power into DC power for the subsequent loads to use. The DC bus provides the DC power with the highest priority for the loads to use.

[0025] Embodiment 2: The load A includes a system control circuit, a closing motor, and a dashboard, and the load B includes a lighting circuit and a heat dissipation circuit. The load A is mainly some loads with high requirements for power supply stability. When such loads face a power outage, it often causes irreparable losses. Therefore, such loads are separately taken out for separate power supply to improve the power supply stability for such loads. The load B is some loads with low requirements for power supply stability. Such loads will not face any losses during a power outage and do not need to be separately guaranteed for power supply stability.

[0026] Embodiment 3: The super capacitor bank can be one or more. When there are multiple super capacitor banks, they are connected to several loads A one-to-one. The super capacitor has the characteristics of short charging time, long service life, good temperature characteristics, energy saving, and environmental protection. Using the super capacitor bank to provide power supply guarantee for the load A can greatly improve the power supply stability of the load A. At the same time, it can also reduce the working pressure of the battery pack. In addition, when the budget is sufficient or the requirement for power supply stability is extremely high, multiple super capacitor banks can also be set up to supply power to multiple loads A one-to-one to further improve the power supply stability.

[0027] The working principle of the utility model is as follows:

[0028] S1. The AC A path and the AC B path cooperate to provide two AC input lines for the DC power supply system. They are redundant to each other and can work alternately when needed.

[0029] S2. When powered by AC, the battery pack and the supercapacitor bank are charged.

[0030] S3. When there is a problem with the AC power supply, the battery pack supplies power to the B load, and the supercapacitor bank supplies power to the A load.

[0031] Compared with the prior art, the present utility model has the following beneficial effects over the prior art:

[0032] In this intelligent power DC power supply system, by setting AC-DC converters, DC buses, A loads, B loads, supercapacitor banks, and battery packs, when powered by AC, the battery pack and the supercapacitor bank are charged. When there is a problem with the AC power supply, the battery pack supplies power to the B load, and the supercapacitor bank supplies power to the A load. The loads are grouped according to the level of demand for power supply stability, and the supercapacitor bank and the battery pack are respectively used to supply power to different loads. Since the supercapacitor has the characteristics of short charging time, long service life, good temperature characteristics, energy conservation, and environmental friendliness, using the supercapacitor bank to provide power supply guarantee for the A load can greatly improve the power supply stability of the A load. At the same time, the working pressure of the battery pack can also be reduced, making the DC power supply system more stable and reliable.

Claims

1. A smart power DC power supply system, comprising an AC A circuit and an AC B circuit; characterized in that: The AC A circuit and the AC B circuit are connected to the charging unit A and the charging unit B respectively, and the charging unit A and the charging unit B are connected to the same AC switching module, and the AC switching module is connected to an AC-DC converter, and the AC-DC converter is connected to a DC bus, and the DC bus is connected to a DC switching module A and a DC switching module B, and the DC switching module A and the DC switching module B are connected to a load A and a load B respectively; The AC / DC converter is also connected to a battery pack and a super capacitor pack. The battery pack is connected to a DC switching module B, and the super capacitor pack is connected to a DC switching module A.

2. A smart electric DC power supply system as claimed in claim 1, characterized in that: The AC A circuit and the charging unit A form a charging branch circuit, and the AC B circuit and the charging unit B form a charging branch circuit, and the two charging branches are redundant circuits.

3. A smart electric DC power supply system as claimed in claim 2, characterized in that: The A load includes a system control circuit, a closing motor, and an instrument panel, and the B load includes a lighting circuit and a heat dissipation circuit.

4. A smart electric DC power supply system as claimed in claim 3, characterized in that: There may be one or more supercapacitor groups. When there are multiple supercapacitor groups, they are connected to a plurality of A loads one-to-one.

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