CN210806840U - A kind of integrated power supply of AC and DC mixed supply - Google Patents

Abstract

The utility model discloses an AC/DC hybrid power supply integrated power supply, wherein the power supply of an AC power supply module and a DC power supply module is taken from a higher-level power supply; the power supply of the DC uninterrupted power supply module is taken from the AC power supply module feeder line and the DC power supply module feeder line; the DC uninterrupted power supply module comprises: one path of power supply is taken from the direct current power supply module and is connected to the I section of direct current bus through the DC/DC charging unit; the other path of power supply is taken from an alternating current power supply module and is connected to a section II direct current bus through an AC/DC charging unit; a spare power automatic switching device is arranged between the inlet switches and the interconnection switches of the I section direct current bus and the II section direct current bus; the DC/DC charging unit and the AC/DC charging unit are respectively connected with the storage battery pack; when two power supplies are lost, the storage battery pack provides uninterrupted power supply for the load and the UPS load. The method solves a series of problems that the direct current power station is difficult to obtain an off-station direct current power supply, the reliability of the off-station direct current power supply is not high, and loads for the alternating current and direct current stations coexist.

Description

A kind of integrated power supply of AC and DC mixed supply

technical field

The invention relates to a power supply, in particular to an AC-DC mixed supply integrated power supply, which belongs to the technical field of power supplies.

Background technique

With the development of science and technology, DC loads, frequency conversion equipment, and distributed power sources have emerged in large numbers. The use of DC power supply can greatly reduce rectifier transformers and avoid multi-level conversion of AC/DC/AC, thereby reducing energy loss; at the same time, there is no DC distribution network. Frequency stability, reactive power and AC charging current, etc., and the distribution capacity is strong, the power supply radius is large; therefore, the DC distribution network has a huge development prospect.

However, the construction of the DC distribution network is still in the early stage. The newly built DC power station has problems such as the inability to obtain the DC power supply outside the station, the low reliability of the DC power supply, and the coexistence of AC and DC loads in the station. electricity demand.

SUMMARY OF THE INVENTION

In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide an integrated power supply of AC and DC mixed supply.

In order to achieve above-mentioned goal, the present invention adopts following technical scheme:

An AC-DC mixed supply integrated power supply, comprising an AC power supply module, a DC power supply module, a DC uninterrupted power supply module, and a UPS power supply module;

The power sources of the AC power supply module and the DC power supply module are respectively taken from the upper-level power supply;

The power supply of the DC uninterrupted power supply module is respectively taken from the AC power supply module feeder and the DC power supply module feeder;

The DC uninterruptible power supply module includes two power sources: one power source is taken from the DC power module, and is connected to the DC bus of the first stage through the DC/DC charging unit; the other power source is taken from the AC power module, and is connected to the AC/DC charging unit. Section II of the DC bus, the DC/DC charging unit and the AC/DC charging unit are respectively connected to the battery pack;

Equipped with a self-switching device between the incoming switch and the tie switch of the DC bus of Section I and Section II of the DC bus;

The power supply of the UPS power supply module is respectively taken from the AC power supply module feeder, and the DC uninterrupted power supply module feeder: the I-section DC busbar and the II-section DC busbar;

When the two power sources are lost, the battery pack will provide uninterrupted power supply to the load and UPS load it carries.

The above-mentioned AC power supply module takes power from the upper-level power supply, adopts dual power supply inlet lines and is equipped with a dual power supply automatic switching device.

The above-mentioned DC power supply module takes power from the upper-level power supply, adopts dual power supply incoming lines and is equipped with a dual power supply automatic switching device.

The above-mentioned integrated AC-DC mixed supply power supply further includes a communication power supply module, and the power supply of the communication power supply module is taken from the feeder of the DC uninterrupted power supply module;

When the two power sources are lost, the battery pack provides uninterrupted power supply for the communication load.

The above-mentioned I-section DC busbar and II-section DC busbar can be connected in series to form a single busbar, and a dual-power automatic switching device is arranged between the above-mentioned two-way incoming switches to replace the standby self-switching device.

The above-mentioned integrated AC/DC power supply also includes a monitoring module, which can communicate with the DC/DC charging unit in the DC uninterrupted power supply module and the battery management system of the battery pack, and adjust the DC/DC in real time according to the battery and load conditions. The output power of the DC charging unit meets the requirements of the load and the initial charge, equalization charge and float charge of the battery.

The benefits of the present invention are:

The AC-DC mixed power supply integrated power supply of the present invention can accept AC power supply and DC power supply at the same time, and the AC and DC power supplies are standby for each other; Reliability: The DC bus adopts the single bus segment wiring form or the single bus wiring form, through the self-switching device and the dual power supply automatic switching device, when one power supply loses power, it automatically switches to the other power supply. When it is lost, the battery pack will provide uninterrupted power supply for its load, UPS load and communication load.

The integrated AC-DC mixed power supply of the present invention can simultaneously provide AC power, DC power, DC uninterruptible power supply, UPS power supply, and communication power supply, and can meet the requirements of power lighting, control and protection systems, HVAC, fire protection and other stations in DC power plants. The power demand of the load is especially suitable for the station power consumption of the newly built DC power station in the early stage of the development of the DC distribution network, which has strong practicability and wide applicability.

Description of drawings

FIG. 1 is a schematic diagram of the circuit structure of the DC bus of the DC uninterruptible power supply module of the present invention in the form of single bus segmented wiring.

FIG. 2 is a schematic diagram of the circuit structure of the DC uninterruptible power supply module of the present invention in the form of single bus connection.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

The present invention provides an integrated AC/DC power supply, including an AC power supply module, a DC power supply module, a DC uninterrupted power supply module, a UPS power supply module, a communication power supply module, a protection module, and a monitoring module; The power source is taken from the upper-level power source, which adopts dual power supply inlet lines and is equipped with a dual power source automatic switching device; the power supply of the DC non-stop power supply module is respectively taken from the AC power supply module feeder and the DC power supply module feeder; the power supply of the UPS power module is respectively taken from the AC power supply module and DC uninterrupted power supply module; the power supply of the communication power supply module is taken from the DC uninterrupted power supply module.

The DC power supply module adopts dual power supply incoming lines, is equipped with dual power supply automatic switching device, and can provide dual power supply for lighting, air conditioning and other DC station loads.

The DC uninterrupted power supply module includes two power supply sources: one power supply is taken from the DC power supply module, and is connected to the I-section DC bus through the DC/DC charging unit; the other power supply is taken from the AC power supply module, and is connected to the AC/DC charging unit. Section II DC bus, and a self-switching device is arranged between the DC bus of Section I and the incoming switch and the tie switch of Section II DC bus, that is, the DC bus adopts the wiring form of single bus section (as shown in Figure 1) ; The DC/DC charging unit and the AC/DC charging unit are respectively connected to the battery pack. That is, the DC uninterrupted power module supplies power to the UPS power module and the communication power module respectively through the feeder: the I-section DC busbar and the II-section DC busbar.

When one power source loses power, it will automatically switch to the other power source; when both power sources are lost, the battery pack will provide uninterrupted power supply to its load, UPS load, and communication load. Both the UPS module and the communication power module have at least one power source taken from the DC uninterruptible power supply module. After the AC/DC incoming line loses power, the battery can continue to supply power to the load. The battery pack should choose batteries that are suitable for long-term work in a floating state.

Example 2

The circuit structure is the same as that of Embodiment 1, but the DC bus is in the form of a single bus connection (as shown in Figure 2), that is, the I-section DC bus and the II-section DC bus are connected in series or combined into a single bus, and the two A dual power supply automatic switching device is configured between the incoming line switches to replace the standby automatic switching device.

When one power source of the DC bus loses power, the dual power source automatic switching device switches to the other power source for power supply. After both power sources are lost, the battery supplies power for the load.

In the above-mentioned embodiment 1 and embodiment 2, in the actual use process, a monitoring module should be added, that is, a monitoring module that can communicate with the DC/DC charging unit in the DC uninterrupted power supply module and the battery management system of the battery pack; Use the ZHY4S monitoring module produced by Shandong Zhiyang Electric Co., Ltd. or other types of monitoring modules with the same function. The monitoring module can realize the following functions:

1) The DC/DC charging module is turned on and off;

2) The running status of the DC/DC charging module;

3) The DC/DC charging module automatically converts between equalizing and floating;

4) DC/DC charging module output voltage;

5) Battery charging current;

6) Temperature compensation for battery float voltage;

7) Sound and light alarm is performed when the DC uninterrupted power supply system fails, and the information is uploaded to the integrated power supply master monitor, and the important fault alarm signal is equipped with an alarm hard contact;

Based on the combination of software and hardware, the monitoring module monitors and automatically adjusts the circuit and power system components, which can further realize the automation, stability and safety of the circuit.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above-mentioned embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (5)

1. An alternating current-direct current hybrid power supply integrated power supply is characterized by comprising an alternating current power supply module, a direct current uninterrupted power supply module and a UPS power supply module;

the power supplies of the alternating current power supply module and the direct current power supply module are respectively taken from a superior power supply;

the power supply of the direct current uninterrupted power supply module is respectively taken from an alternating current power supply module feeder line and a direct current power supply module feeder line;

the direct-current uninterrupted power supply module comprises two power supplies: one path of power supply is taken from the direct current power supply module and is connected to the I section of direct current bus through the DC/DC charging unit; the other path of power supply is taken from an alternating current power supply module and is connected to a section II direct current bus through an AC/DC charging unit; a spare power automatic switching device is arranged between the incoming line switch and the interconnection switch of the I-section direct current bus and the II-section direct current bus;

the DC/DC charging unit and the AC/DC charging unit are respectively connected with the storage battery pack;

the power of the UPS power module is respectively taken from the AC power module feeder line and the DC uninterrupted power supply module feeder line: the I section direct current bus and the II section direct current bus;

when two power supplies are lost, the storage battery pack provides uninterrupted power supply for the load and the UPS load.

2. The integrated power supply of claim 1, wherein the alternating current power supply module supplies power to a superior power supply by adopting a dual power supply inlet wire and configuring a dual power supply automatic switching device.

3. The integrated power supply of claim 1, wherein the dc power module is powered by a higher power supply, and adopts a dual power inlet and is provided with a dual power automatic switching device.

4. The AC-DC hybrid power supply integrated power supply according to claim 1, further comprising a communication power supply module, wherein the power supply of the communication power supply module is taken from a DC uninterrupted power supply module feeder;

when two power supplies are lost, the storage battery pack provides uninterrupted power supply for the communication load.

5. The integrated power supply of claim 1, wherein the I-section dc bus and the II-section dc bus can be connected in series to form a single bus, and a dual power automatic switching device is disposed between the two incoming switches.

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