WO2022001834A1

WO2022001834A1 - Power supply and distribution system for data center

Info

Publication number: WO2022001834A1
Application number: PCT/CN2021/102176
Authority: WO
Inventors: 刘峰; 王海保; 魏子良
Original assignee: 中国移动通信集团设计院有限公司; 中国移动通信集团有限公司
Priority date: 2020-06-30
Filing date: 2021-06-24
Publication date: 2022-01-06
Also published as: CN113872181B; CN113872181A

Abstract

Provided is a power supply and distribution system for a data center. The system comprises a feed circuit, a voltage energy router and an alternating-current/direct-current load power distribution segment bus, wherein the feed circuit is connected to the voltage energy router, so as to provide an initial voltage to the voltage energy router; and the voltage energy router is connected to the alternating-current/direct-current load power distribution segment bus, so as to convert the initial voltage into a required voltage suitable for a load connected to the alternating-current/direct-current load power distribution segment bus. By means of the power supply and distribution system for a data center provided in the embodiments of the present application, buck conversion is directly performed on the initial voltage of a mains power supply by using the voltage energy router, so as to generate a required voltage suitable for a load connected to the alternating-current/direct-current load power distribution segment bus. Compared with an existing power supply and distribution system for a data center, the multi-stage conversion of a high-low voltage power distribution part and a communication power source system is reduced, thereby improving the overall efficiency of voltage conversion.

Description

Data center power supply and distribution system

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202010620601.8 and the application name "Data Center Power Supply and Distribution System" filed with the China Patent Office on June 30, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of power distribution technology, and in particular, to a data center power supply and distribution system.

Background technique

The existing data center power supply and distribution system, as shown in Figure 1, consists of two parts, the high and low voltage power distribution part located in the high and low voltage room and the communication power supply system located in the power battery room. The main structure is: after the 10kV mains enters the high and low voltage room, it forms an AC 380V power distribution circuit after passing through high voltage power distribution equipment, power frequency transformers, and low voltage power distribution equipment, and then enters the power battery room and passes through the secondary low voltage power distribution equipment, respectively. Enter rectifier equipment and UPS. Among them, a battery pack with corresponding voltage is incorporated between the rectifier equipment and the negative 48V output circuit. When the mains power is lost, the battery pack is used to ensure the power supply output for the corresponding voltage load, and a DC negative 48V power distribution circuit is formed through the DC power distribution panel; The equipment and the DC 336V output circuit are merged into the battery bank of the corresponding voltage, and the DC 336V power distribution circuit is formed through the DC power distribution panel; the corresponding voltage battery is arranged between the UPS and the AC output, and the AC 380V power distribution is formed through the AC power distribution panel. loop.

The main shortcomings of the existing power supply and distribution system include the following four points:

1. Multi-level power frequency AC voltage conversion and multi-level AC-DC conversion for power supply and distribution have low overall efficiency;

2. The DC voltage supply and distribution range is narrow and the voltage type is single;

3. The battery units of the UPS or DC system with different voltage levels have a lot of repeated investment, cannot be reused, and occupy a large area;

4. The power supply and distribution system has a low integration degree, and the functional integration, design, operation and maintenance and engineering complexity between various equipment and devices are large, and the reliability is low.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the embodiments of the present application provide a data center power supply and distribution system.

An embodiment of the present application provides a power supply and distribution system for a data center, including a feeder circuit, a voltage energy router, and an AC/DC load distribution segment bus, wherein:

the feeding circuit is connected to the voltage energy router, and is used for providing an initial voltage to the voltage energy router;

The voltage energy router is connected to the AC/DC load distribution segment bus for converting the initial voltage into a required voltage suitable for the loads connected to the AC/DC load distribution segment bus.

Further, the system further includes an energy storage battery, the energy storage battery is connected to the DC bus in the voltage energy router for energy storage, and when the DC bus voltage is low or the mains is powered off, according to the energy storage The battery capacity and load requirements power the load.

Further, the voltage energy router includes an access module, an energy routing intermediate level unit and a communication power distribution module, wherein:

the access module, connected to the feeding circuit, for receiving the initial voltage and inputting the initial voltage to the energy routing intermediate stage unit;

The energy routing intermediate-level unit is connected to the communication power distribution module, and is used for converting the initial voltage into a stepped-down AC or DC voltage;

The communication power distribution module is connected to the AC/DC load distribution segment bus, and is used to convert the stepped-down AC or DC voltage converted by the energy routing intermediate stage unit into a voltage suitable for AC/DC load distribution. The desired voltage of the load connected to the electrical segment bus.

Further, the energy routing intermediate stage unit includes a first voltage conversion unit, a DC bus and a second voltage conversion unit, wherein:

The first voltage conversion unit is respectively connected with the access module and the DC bus, and is used for converting the initial voltage into a DC voltage after the step-down, and inputting the DC voltage into the DC bus;

the DC bus is connected to the second voltage conversion unit, and inputs the DC voltage into the second voltage conversion unit;

The second voltage conversion unit is connected to the communication power distribution module, and is used for converting the DC voltage into an AC or DC voltage.

Further, the first voltage transformation unit includes a front-stage cascaded full-bridge unit, a high-frequency isolation transformation unit and a rear-stage transformation unit, wherein:

The front-stage cascaded full-bridge unit is connected to the high-frequency isolation transformer unit for converting the initial voltage into a stepped-down AC voltage;

The high-frequency isolation transformer unit is connected to the rear-stage transform unit, and is used for transforming the stepped-down AC voltage into a stepped-down high-frequency AC voltage;

The latter-stage conversion unit is connected to the DC bus, and is used for converting the stepped-down high-frequency AC voltage into a stepped-down DC voltage.

Further, the second voltage conversion unit includes a DC/AC inverter unit and a DC/DC conversion unit, wherein:

Both the DC/AC inverter unit and the DC/DC conversion unit are connected to the DC bus, and are used for converting the step-down DC voltage into a step-down AC or DC voltage.

Further, the front-stage cascaded full-bridge unit includes two bridge arms, respectively a left bridge arm and a right bridge arm, each bridge arm includes two upper and lower IGBT modules, and two upper and lower IGBT modules of the left and right bridge arms. The middle connection points form the left middle connection point and the right middle connection point of the bridge arm, the left middle connection point is connected with an access point of the high-frequency isolation transformer unit, and the right middle connection point is connected with the left middle connection point of the next-level bridge arm. The point connection forms a cascade, and the right middle connection point of the last stage bridge arm is connected to another access point of the high-frequency isolation transformer unit.

Further, the high-frequency isolation transformer unit is a high-frequency transformer.

Further, the post-stage conversion unit is a full-bridge rectifier circuit.

Further, the access module includes an isolation cabinet and a metering device, wherein:

The isolation cabinet is used to perform initial voltage access and isolation and disconnection through a disconnecting switch;

The metering device is used to collect power, electrical energy and other electrical parameters.

In the data center power supply and distribution system provided by the embodiment of the present application, a voltage energy router is used to directly step-down and transform the initial voltage of the mains, so as to generate the required voltage suitable for the load connected to the AC/DC load distribution segment bus. Compared with the current data center power supply and distribution system, the multi-level transformation of the high and low voltage distribution part and the communication power supply system is reduced, and the comprehensive efficiency of the voltage transformation is improved.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a structural block diagram of an existing data center power supply and distribution system;

2 is a structural block diagram of a data center power supply and distribution system according to an embodiment of the present application;

3 is a schematic structural diagram of a voltage energy router according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a specific circuit structure of a first voltage conversion unit according to an embodiment of the present application.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

FIG. 2 shows a structural block diagram of a data center power supply and distribution system provided by an embodiment of the present application. Referring to FIG. 2 , the system includes a feeder circuit 11 , a voltage energy router 12 and an AC/DC load distribution segment bus 13 ,in:

The feeding circuit 11 is connected to the voltage energy router 12 for supplying an initial voltage to the voltage energy router.

The voltage energy router 12 is connected to the AC/DC load distribution segment bus 13 for converting the initial voltage into a required voltage suitable for the loads connected to the AC/DC load distribution segment bus 13 .

In this regard, it should be noted that, in the embodiment of the present application, the feeding circuit may be a circuit that provides a voltage in the medium voltage section, and the voltage in the medium voltage section may be a voltage in the range of 1-35KV. The feeder circuit is connected to the commercial power and provides the initial voltage of the medium voltage section to the voltage energy router.

The system is used for power supply and distribution. To this end, the initial voltage input by the mains needs to be stepped down and transformed into the voltage required by the load in the grid. Therefore, after receiving the initial voltage, the voltage energy router will step-down and transform the initial voltage, and convert it into a required voltage suitable for the load connected to the AC/DC load distribution segment bus. The AC/DC load distribution segment bus is used to transmit voltage and provide the required voltage to the load.

Using an integrated high-voltage energy router, compared with the existing system, without the need for power frequency transformers and UPS, avoiding multi-level transformation, and directly transforming the medium-voltage section voltage into AC 380V including energy storage batteries and DC supporting different voltage levels.

The embodiment of the present application provides a power supply and distribution system for a data center, which uses a voltage energy router to directly step-down and transform the initial voltage of the mains to generate a required voltage suitable for the loads connected to the AC/DC load distribution segment bus, and Compared with the current data center power supply and distribution system, the multi-level transformation of the high and low voltage distribution part and the communication power supply system is reduced, and the comprehensive efficiency of the voltage transformation is improved.

In a further embodiment of the system of the above embodiment, continuing to refer to FIG. 2 , the system further includes an energy storage battery 14 connected to the DC bus in the voltage energy router 12 for storing electrical energy from the DC bus, And when the DC bus voltage is low or the mains is out of power, the load is powered according to the capacity of the energy storage battery and the load demand.

The energy storage pool can realize a variety of distributed energy storage, including but not limited to electrochemical energy storage, mechanical energy storage, wind energy, sunlight, liquid energy storage and other energy storage methods, which are integrated into DC through the isolation and shared management device The high-voltage energy router includes a voltage DC bus, and can be interconnected with other high-voltage energy routers through a DC tie switch.

The storage battery can be used with batteries, and its voltage level can be selected from 450V to 750V, which greatly improves the utilization rate of the battery and reduces the floor space of the power battery room.

In a further embodiment of the system in the above embodiment, FIG. 3 shows a schematic structural diagram of a voltage energy router provided by an embodiment of the present application. Referring to FIG. 3 , the voltage energy router includes an access module 21 , an energy routing intermediate level unit 22 and Communication power distribution module 23, wherein:

The access module 21 is connected to the feeding circuit in FIG. 1 , and is used for receiving the initial voltage and inputting the initial voltage to the energy routing intermediate stage unit 22 .

The energy routing intermediate stage unit 22 is connected to the communication power distribution module 23, and is used for converting the initial voltage into a stepped-down AC or DC voltage.

The communication power distribution module 23 is connected to the AC/DC load distribution segment bus in FIG. 1, and is used to convert the stepped-down AC or DC voltage converted by the energy routing intermediate unit into a voltage suitable for AC/DC load distribution Desired voltage of the load connected on the segment bus. The communication power distribution module includes at least one group of DC switches and AC switches.

In this regard, it should be noted that the access module 21 has the functions of isolation, grounding, and live display. The access module mainly includes an isolation cabinet and a metering device. The isolation cabinet realizes the connection and isolation and breaking of the initial voltage of the medium voltage section through the breaking switch. The metering device is mainly a multi-rate bidirectional metering instrument with metering function, and has the function of collecting power, electrical energy and other electrical parameters.

3, the energy routing intermediate stage unit includes a first voltage conversion unit 221, a DC bus 222 and a second voltage conversion unit 223, wherein:

The first voltage transforming unit 221 is connected to the access module 21 and the DC bus 222 respectively, and is used for transforming the initial voltage into a stepped-down DC voltage, and inputting the DC voltage into the DC bus.

The DC bus 222 is connected to the second voltage conversion unit 223 and inputs the DC voltage to the second voltage conversion unit 223 .

The second voltage conversion unit 223 is connected to the communication power distribution module 23, and is used for converting the DC voltage into an AC or DC voltage.

Continuing to refer to FIG. 3 , the first voltage transformation unit includes a front-stage cascaded full-bridge unit 2211, a high-frequency isolation transformation unit 2212 and a rear-stage transformation unit 2213, wherein:

The front-stage cascaded full-bridge unit 2211 is connected to the high-frequency isolation transformer unit 2212 for transforming the initial voltage into a stepped-down AC voltage.

The high-frequency isolation transformation unit 2212 is connected to the subsequent-stage transformation unit 2213, and is used for transforming the stepped-down AC voltage into a stepped-down high-frequency AC voltage.

The post-stage conversion unit 2213 is connected to the DC bus 222 and is used for converting the stepped-down high-frequency AC voltage into a stepped-down DC voltage.

The front-stage cascaded full-bridge unit directly performs step-down conversion on the AC initial voltage of the commercial power to obtain the step-down AC voltage. The high-frequency isolation transformer unit converts the stepped-down AC voltage into a stepped-down high-frequency AC voltage. The post-stage conversion unit converts the stepped-down high-frequency AC voltage into a stepped-down DC voltage, so that the DC voltage can be input to the DC bus.

Continuing to refer to FIG. 3 , the second voltage conversion unit includes a DC/AC inversion unit 2231 and a DC/DC conversion unit 2232, wherein:

The DC/AC inverter unit 2231 and the DC/DC conversion unit 2232 are both connected to the DC bus 222, and are used for converting the stepped-down DC voltage into a stepped-down AC or DC voltage.

The DC voltage output by the DC bus, under the action of the DC/AC inverter unit and the DC/DC conversion unit, can generate the required voltage suitable for the load connected to the AC/DC load distribution segment bus, such as AC 400V, DC 48V, DC 240V and DC 336V, etc.

Both the DC/AC inverter unit and the DC/DC conversion unit adopt a modular design, which can eliminate single point failures, improve the operation efficiency of the power supply and distribution system, and reduce the floor space of the substation.

FIG. 4 shows a schematic diagram of a specific circuit structure of the first voltage conversion unit according to the embodiment of the present application. Referring to FIG. 4 , the front-stage cascaded full-bridge unit 2211 includes two bridge arms, which are a left bridge arm and a right bridge arm respectively. Each bridge arm includes two upper and lower IGBT modules. The two middle connection points of the upper and lower IGBT modules of the left and right bridge arms form the left middle connection point and the right middle connection point of the bridge arm. The left middle connection point is connected to the high-frequency isolation transformer unit. The right middle connection point is connected with the left middle connection point of the next-stage bridge arm to form a cascade connection, and the right middle connection point of the last stage bridge arm is connected with another access point of the high-frequency isolation transformer unit. connected. The front-stage cascaded full-bridge unit can achieve a step-down effect, and at the same time, the withstand voltage of the cascaded IGBT modules is lower than the voltage of the medium-voltage section, which can realize high-frequency switching action and reduce the volume of the inductance and the transformer.

The high-frequency isolation transformer unit 2212 is a high-frequency transformer. The high-frequency isolation transformer unit is a high-frequency transformer, which plays the role of electrical isolation and step-down. Since the switching frequency works at 2KHz-100KHz, which is much higher than the power frequency transformer of 50Hz, the volume is small, which can greatly reduce the copper material cost.

The post-stage conversion unit 2213 is a full-bridge rectifier circuit, and converts the high-frequency alternating current from the high-frequency isolation transformer unit into direct current.

The above embodiments provide a data center power supply and distribution system, which uses a voltage energy router to directly step down and transform the initial voltage of the mains to generate the required voltage suitable for the loads connected to the AC/DC load distribution segment bus, and the phase Compared with the current data center power supply and distribution system, the multi-level transformation of the high and low voltage distribution part and the communication power supply system is reduced, and the comprehensive efficiency of the voltage transformation is improved.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Industrial Applicability

In the embodiment of the present application, the power supply and distribution system of the data center may include a feeder circuit, a voltage energy router, and an AC/DC load distribution segment bus, wherein: the feeder circuit is connected to the voltage and energy router, and is used to provide all The voltage energy router provides an initial voltage; the voltage energy router is connected to the AC/DC load distribution segment bus for converting the initial voltage into a voltage suitable for the loads connected to the AC/DC load distribution segment bus. required voltage. In this way, in the data center power supply and distribution system provided by the embodiment of the present application, the voltage energy router is used to directly step-down and transform the initial voltage of the mains, so as to generate the required voltage suitable for the loads connected to the AC/DC load distribution segment bus. , Compared with the current data center power supply and distribution system, the multi-level transformation of the high and low voltage distribution part and the communication power supply system is reduced, and the comprehensive efficiency of the voltage transformation is improved.

Claims

A data center power supply and distribution system, comprising a feeder circuit, a voltage energy router, and an AC/DC load distribution segment bus, wherein:

the feeding circuit is connected to the voltage energy router, and is used for providing an initial voltage to the voltage energy router;

The voltage energy router is connected to the AC/DC load distribution segment bus for converting the initial voltage into a required voltage suitable for the loads connected to the AC/DC load distribution segment bus.
The data center power supply and distribution system according to claim 1, wherein the system further comprises an energy storage battery, the energy storage battery is connected to the DC bus in the voltage energy router, used for energy storage, and stored in the DC When the bus voltage is low or the mains is powered off, the load is powered according to the capacity of the energy storage battery and the load demand.
The data center power supply and distribution system according to claim 1, wherein the voltage energy router comprises an access module, an energy routing intermediate level unit and a communication power distribution module, wherein:

the access module, connected to the feeding circuit, for receiving the initial voltage and inputting the initial voltage to the energy routing intermediate stage unit;

The energy routing intermediate-level unit is connected to the communication power distribution module, and is used for converting the initial voltage into a stepped-down AC or DC voltage;

The communication power distribution module is connected to the AC/DC load distribution segment bus, and is used to convert the stepped-down AC or DC voltage converted by the energy routing intermediate stage unit into a voltage suitable for AC/DC load distribution. The desired voltage of the load connected to the electrical segment bus.
The data center power supply and distribution system according to claim 3, wherein the energy routing intermediate stage unit comprises a first voltage conversion unit, a DC bus and a second voltage conversion unit, wherein:

The first voltage conversion unit is respectively connected with the access module and the DC bus, and is used for converting the initial voltage into a DC voltage after the step-down, and inputting the DC voltage into the DC bus;

the DC bus is connected to the second voltage conversion unit, and inputs the DC voltage into the second voltage conversion unit;

The second voltage conversion unit is connected to the communication power distribution module, and is used for converting the DC voltage into an AC or DC voltage.
The data center power supply and distribution system according to claim 4, wherein the first voltage conversion unit comprises a front-stage cascaded full-bridge unit, a high-frequency isolation transformer unit and a rear-stage conversion unit, wherein:

The front-stage cascaded full-bridge unit is connected to the high-frequency isolation transformer unit for converting the initial voltage into a stepped-down AC voltage;

The high-frequency isolation transformer unit is connected to the rear-stage transform unit, and is used for transforming the stepped-down AC voltage into a stepped-down high-frequency AC voltage;

The latter-stage conversion unit is connected to the DC bus, and is used for converting the stepped-down high-frequency AC voltage into a stepped-down DC voltage.
The data center power supply and distribution system according to claim 4, wherein the second voltage conversion unit comprises a DC/AC inverter unit and a DC/DC conversion unit, wherein:

Both the DC/AC inverter unit and the DC/DC conversion unit are connected to the DC bus, and are used for converting the step-down DC voltage into a step-down AC or DC voltage.
The data center power supply and distribution system according to claim 5, wherein the front-stage cascaded full-bridge unit comprises two bridge arms, respectively a left bridge arm and a right bridge arm, and each bridge arm comprises two upper and lower IGBTs Module, the two middle connection points of the upper and lower IGBT modules of the left and right bridge arms form the left middle connection point and the right middle connection point of the bridge arm, the left middle connection point is connected with an access point of the high-frequency isolation transformer unit, the right The middle connection point is connected with the left middle connection point of the next stage bridge arm to form a cascade connection, and the right middle connection point of the last stage bridge arm is connected with another access point of the high frequency isolation transformer unit.
The data center power supply and distribution system according to claim 5, wherein the high-frequency isolation and transformation unit is a high-frequency transformer.
The data center power supply and distribution system according to claim 5, wherein the latter-stage conversion unit is a full-bridge rectifier circuit.
The data center power supply and distribution system according to claim 3, wherein the access module comprises an isolation cabinet and a metering device, wherein:

The isolation cabinet is used to perform initial voltage access and isolation and disconnection through a disconnecting switch;

The metering device is used to collect power, electrical energy and other electrical parameters.
A voltage energy router includes an access module, an energy routing intermediate-level unit and a communication power distribution module, wherein:

the access module, connected to the feeding circuit, for receiving an initial voltage and inputting the initial voltage to the energy routing intermediate stage unit;

The energy routing intermediate-level unit is connected to the communication power distribution module, and is used for converting the initial voltage into a stepped-down AC or DC voltage;

The communication power distribution module is connected to the AC/DC load distribution segment bus, and is used to convert the stepped-down AC or DC voltage converted by the energy routing intermediate stage unit into a voltage suitable for the AC/DC load distribution. The desired voltage of the load connected to the electrical segment bus.
The voltage energy router of claim 11, wherein the initial voltage is an initial voltage of a medium voltage segment.
The voltage energy router according to claim 12, wherein the initial voltage of the medium voltage section is a voltage in the range of 1-35KV.
The voltage energy router of claim 11, wherein the energy routing intermediate stage unit includes a first voltage conversion unit, a DC bus, and a second voltage conversion unit, wherein:

The first voltage conversion unit is connected to the access module and the DC bus, respectively, and is used for converting the initial voltage into a stepped-down DC voltage, and inputting the DC voltage into the DC bus;

the DC bus is connected to the second voltage conversion unit, and inputs the DC voltage into the second voltage conversion unit;

The second voltage conversion unit is connected to the communication power distribution module, and is used for converting the DC voltage into an AC or DC voltage.
The voltage energy router according to claim 14, wherein the first voltage transformation unit comprises a front-stage cascaded full-bridge unit, a high-frequency isolation transformation unit and a rear-stage transformation unit, wherein:

The front-stage cascaded full-bridge unit is connected to the high-frequency isolation transformer unit for converting the initial voltage into a stepped-down AC voltage;

The high-frequency isolation transformer unit is connected to the rear-stage transform unit, and is used for transforming the stepped-down AC voltage into a stepped-down high-frequency AC voltage;

The latter-stage conversion unit is connected to the DC bus, and is used for converting the stepped-down high-frequency AC voltage into a stepped-down DC voltage.
The voltage energy router of claim 14, wherein the second voltage conversion unit comprises a DC/AC inversion unit and a DC/DC conversion unit, wherein:

Both the DC/AC inverter unit and the DC/DC conversion unit are connected to the DC bus, and are used for converting the step-down DC voltage into a step-down AC or DC voltage.
The voltage energy router according to claim 15, wherein the front-stage cascaded full-bridge unit includes two bridge arms, respectively a left bridge arm and a right bridge arm, and each bridge arm includes two upper and lower IGBT modules, the left and right The two middle connection points of the upper and lower IGBT modules of the bridge arm form the left middle connection point and the right middle connection point of the bridge arm. The left middle connection point is connected to an access point of the high-frequency isolation transformer unit, and the right middle connection point It is connected with the left middle connection point of the bridge arm of the next stage to form a cascade connection, and the right middle connection point of the bridge arm of the last stage is connected with another access point of the high frequency isolation transformer unit.
The voltage energy router according to claim 15, wherein the high frequency isolation transformer unit is a high frequency transformer.
The voltage energy router according to claim 15, wherein the latter-stage conversion unit is a full-bridge rectifier circuit.
The voltage energy router of claim 11, wherein the access module includes an isolation cabinet and a metering device, wherein:

The isolation cabinet is used to perform initial voltage access and isolation and disconnection through a disconnecting switch;

The metering device is used to collect power, electrical energy and other electrical parameters.