A distributed power supply control system for high-power laboratories

Abstract

The present application relates to a kind of distributed power supply control systems for high-power laboratory, comprising: power distribution combination, multiple power supply combinations and multiple DC output units;The power distribution combination, multiple power supply combinations and multiple DC output units are communicated by CAN bus;The power distribution combination and multiple power supply combinations are connected by AC bus;The output of multiple power supply combinations is connected by DC bus;Each power supply combination is connected with a DC output unit;The power distribution combination is used to convert the input power supply of power supply into 220V AC power supply, and is supplied to power supply combination by AC bus;Wherein, the power supply includes: mains, generator and backup power supply;The power supply combination is used to convert AC into 26V-29V DC to DC output unit power supply;The DC output unit uses bidirectional Buck-Boost power module to realize 1 DC input to multiple DC output, and is supplied to power equipment, the present application effectively saves energy and improves the service life of power supply, so as to realize centralized power supply or distributed power supply use.

Description

Technical Field

[0001] This invention belongs to the field of power control technology, and in particular relates to a distributed power control system for high-power laboratories. Background Technology

[0002] In modern laboratories, especially in environments using magnetic resonance imaging (MRI) equipment, the stability and reliability of the power supply are extremely important. MRI equipment has very high power requirements; any voltage fluctuations or frequency changes can affect image quality and data accuracy. Traditional centralized power supply methods have significant shortcomings when dealing with MRI equipment. For example, the high instantaneous power demands of MRI operation can cause grid fluctuations, affecting the normal operation of the equipment and other precision instruments. Furthermore, traditional systems lack sufficient redundancy; if the main power supply fails, the switch to a backup power supply may interrupt MRI operation.

[0003] To address these issues, modern laboratories often employ advanced power solutions such as UPS, voltage regulators, and independent power distribution units to reduce the impact of external power fluctuations and ensure the stable operation of MRI equipment. Proper power planning is equally crucial, contributing to improved system reliability and efficiency. Patent number CN116960786A discloses an intelligent power distribution combination dual-power system, which ensures uninterrupted operation of internal components through a power combination, main power supply, dual-power automatic transfer switch, auxiliary power supply, power monitoring sensors, and controller.

[0004] Patent No. CN118630597A discloses a multi-redundant, hot-swappable intelligent high-voltage power distribution assembly and its control system. Each high-voltage circuit is controlled by a power module. Faulty modules can be automatically isolated and can be plugged in and repaired while energized. Repairs can be completed by replacing the faulty module. The assembly structure can be configured with corresponding functional devices as needed. Through internal connectors and assembly cooperation, the structure is versatile and strong.

[0005] However, in implementing related technologies, deploying centralized power supply systems makes it difficult to achieve refined energy consumption management, easily leading to resource waste. In the face of emergencies such as natural disasters or power grid failures, centralized power supplies have a slow recovery speed, failing to quickly ensure the uninterrupted operation of laboratory equipment. With the expansion of laboratory scale and technological advancements, the scalability and flexibility of centralized power supply systems are insufficient to adapt to future changes. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention provides a distributed power supply control system for a high-power laboratory, comprising:

[0007] The system comprises a power distribution assembly, multiple power supply assemblies, and multiple DC output units; the power distribution assembly, multiple power supply assemblies, and multiple DC output units communicate with each other via a CAN bus; the power distribution assembly and multiple power supply assemblies are connected via an AC bus; the output terminals of the multiple power supply assemblies are connected via a DC bus; each power supply assembly is connected to one DC output unit.

[0008] The power distribution unit is used to convert the input power from the power supply source into 220V AC power and supply power to the power supply unit through the AC bus; wherein, the power supply source includes: mains power, generator and backup power;

[0009] The power supply unit is used to convert AC power into DC power of 26V to 29V to supply power to the DC output unit;

[0010] The DC output unit uses a bidirectional Buck-Boost power module to achieve one DC input to multiple DC outputs, supplying power to electrical equipment;

[0011] The power supply input of the power distribution assembly includes:

[0012] When the sum of the current output power of all power supply combinations is greater than the rated output power of the mains power, the power distribution combination is simultaneously connected to the mains power and the generator as input power. When the sum of the current output power of all power supply combinations is greater than the sum of the rated output power of the mains power and the generator, the power distribution combination is simultaneously connected to the mains power, the generator, and the backup power supply as input power. When the sum of the current output power of all power supply combinations is less than the rated output power of the power distribution combination's input power, and when the output power required by the DC output unit corresponding to a certain power supply combination is greater than the rated output power of that power supply combination, the output voltage of the other power supply combinations is adjusted in the 27-29V range so that the other power supply combinations can perform energy balancing to that power supply combination through the DC bus until the output power requirement of that power supply combination is met.

[0013] Preferably, the power distribution unit includes: a power detection circuit, a state estimation unit, a mode control unit, and a communication unit; the power detection circuit is used to collect the output power information of the power distribution unit from the AC bus; the state estimation unit is used to calculate the difference between the output power of the power distribution unit and its rated power; the mode control unit is used to control the power distribution unit to connect to one or more of the mains power, generator, and backup power source as a power supply source according to the difference calculated by the state estimation unit; the communication unit communicates with the state estimation unit, the mode control unit, and the CAN bus to transmit relevant instructions and data.

[0014] Preferably, the backup power supply is a DC power supply source. When the power distribution unit needs to connect to the backup power supply as a power supply source, the DC power output by the backup power supply needs to be converted into AC power through the following current conversion module; the current conversion module includes: inverter, SPWM module, DAC converter, current loop, voltage loop, ADC converter, microcontroller, CAN unit and power acquisition module;

[0015] The inverter's input terminal is connected to the output terminal of the backup power supply to convert DC to AC; the inverter's output terminal is connected to the AC bus; the ADC converter is used to acquire the instantaneous voltage of the AC bus; the power acquisition module is used to acquire the power information of the AC bus; the microcontroller is used to calculate the effective voltage of the AC bus based on the power acquired by the power acquisition module; the microcontroller is used to calculate the voltage difference between the effective voltage and the instantaneous voltage of the AC bus, and to calculate the current difference based on the voltage difference and the expected power value, wherein the expected power value is the sum of the current output power of all power supply combinations minus the sum of the rated output power of the mains power and the generator, and sends the calculated voltage difference and current difference to the voltage loop and the current loop respectively; the voltage loop generates a feedback signal based on the voltage difference and sends it to the current loop; the output terminal of the current loop is connected to the input terminal of the DAC converter; the output terminal of the SPWM module is connected to the control terminal of the inverter for controlling the inverter; the microcontroller is connected to the CAN bus through the CAN unit for transmitting relevant instructions and data.

[0016] Preferably, the power supply assembly includes: an AC filter module, N PFC modules, N DC / DC modules, an output filter module, an output detection module, a power regulation unit, a compensation control unit, an auxiliary power supply, a microcontroller, and a CAN communication module;

[0017] The AC filtering module is used to filter the input AC power. Its output is connected to the input of the auxiliary power supply and the inputs of N PFC modules. The output of the auxiliary power supply is connected to the power regulation unit and the microcontroller to provide power. The power regulation unit is connected to the compensation control unit and the N PFC modules. The N PFC modules and N DC / DC modules together form N AC / DC modules to convert AC power to DC power. The outputs of the N DC / DC modules are connected to the input of the output filtering module to filter the output DC power. The output of the output filtering module is connected to the DC bus. The output detection module is used to detect the power of the DC bus. The output of the output detection module is connected to the compensation control unit. The compensation control unit is connected to the power regulation unit. The power compensation unit is connected to the N DC / DC modules. The microcontroller is connected to the power regulation unit and the compensation control unit. The CAN communication module connects the auxiliary power supply, the power regulation unit, the Hall sensor, the microcontroller, and the compensation control unit to transmit relevant commands and data.

[0018] Preferably, the DC output unit includes: multiple DC output branches; each DC output branch includes: a DC-DC module, a current loop n, a voltage loop n, a microcontroller, and a sampling module; the input terminal of the DC-DC module is connected to a DC bus; the output terminal of the DC-DC module is connected to an output load; the sampling module is used to acquire the instantaneous current at the output terminal of the DC-DC module through a Hall sensor and to calculate the output voltage at the output terminal of the DC-DC module through a loss resistor;

[0019] The microcontroller monitors and acquires the voltage and current values ​​at the output terminals of the DC-DC module in real time. It receives the output voltage and target power of the power supply combination via the communication module, using the output voltage as a reference voltage. The difference voltage is calculated between the reference voltage and the DC-DC module output voltage. The power output of the DC-DC module is calculated using the output voltage and current. The differential power is calculated based on the output power and target power of the power supply combination. The differential current is calculated based on the differential power and differential voltage. The differential voltage and differential current are sent to voltage loop n and current loop n, respectively, to control the DC-DC module and achieve power stability and load balancing. Current loop n generates a feedback signal based on the differential current and sends it to voltage loop n. Voltage loop n generates a PWM signal to control the output voltage of the DC-DC module. The communication module and microcontroller are connected to a CAN communication bus for transmitting relevant commands and data.

[0020] The present invention has at least the following beneficial effects

[0021] This invention, through the coordinated operation of a power distribution unit, a power supply unit, and a DC output unit, enables real-time monitoring and control of the power supply, ensuring a stable and reliable power supply for various high-precision equipment in the laboratory. The power distribution unit can connect to mains power, generators, and backup power as needed, adjusting the power supply source in real time to cope with dynamic changes in the power demands of the equipment. The power supply unit includes components such as an AC filter module, a PFC module, a DC / DC module, and an output filter module, ensuring stable and reliable DC output power to meet the high power quality requirements of high-precision equipment. The distributed power supply and control system transmits control commands, status, and data through a three-level control management architecture, achieving centralized management of the entire system. The power supply units are connected via a DC bus, enabling energy balancing and power regulation, ensuring balanced output power among the units, and allowing for intelligent power adjustment and energy distribution based on actual needs. This invention effectively saves energy and extends the lifespan of the power supplies, thus enabling centralized or distributed power supply applications. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the distributed power supply control system of the present invention;

[0023] Figure 2 This is a bus diagram of the distributed power supply control system of the present invention;

[0024] Figure 3 This is a schematic diagram of the power distribution assembly of the present invention;

[0025] Figure 4 This is a structural diagram of the backup power supply to power supply source of the present invention;

[0026] Figure 5 This is a schematic diagram of the power supply combination of the present invention;

[0027] Figure 6 This is a schematic diagram of the DC output unit of the present invention;

[0028] Figure 7 This is a schematic diagram illustrating a practical application scenario of the present invention. Detailed Implementation

[0029] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please see Figures 1 to 7 Example 1, please refer to Figure 1 and Figure 2 For medical research institutions, which are mostly high-power laboratories, a stable and reliable power supply is required to power a variety of sophisticated experimental equipment. These devices have high power quality requirements and varying power demands. To meet these needs, this laboratory has decided to adopt a distributed power control system for high-power laboratories, including:

[0031] The power distribution unit is deployed in the main power distribution room of the laboratory and is responsible for converting the input power from the mains, generators and backup power sources (such as battery packs) into 220V AC power.

[0032] The power distribution unit is equipped with a power detection circuit, a state estimation unit, a mode control unit, and a communication unit to achieve real-time monitoring and control of the output power.

[0033] The power supply units are distributed across various areas of the laboratory, with each area configured with a certain number of power supply units based on the power requirements of the equipment.

[0034] Each power supply unit includes components such as an AC filter module, a PFC module, a DC / DC module, and an output filter module to ensure stable and reliable DC output.

[0035] The power supply units are connected via a DC bus to achieve energy balancing and power regulation.

[0036] The DC output unit is positioned close to the experimental equipment to facilitate power supply to the equipment.

[0037] Each DC output unit includes components such as a DC-DC module, current loop, voltage loop, and RMS calculation module to ensure that the output DC power meets the power requirements of the device.

[0038] The DC output units communicate with the power distribution and power supply units via a CAN bus to achieve intelligent power regulation and energy balancing.

[0039] The distributed power supply and control system transmits control commands, status, and data through a three-level control management architecture. The power distribution unit transmits relevant status and data to the host computer and display panel via a CAN bus, and exchanges and summarizes information with each power supply unit through the CAN bus, thereby achieving centralized management and control of the entire distributed power supply. The display panel is used to monitor the AC output status of the mains power, generator, and backup power, as well as the DC output status of each power supply unit and the DC output status of the DC output unit, and transmits the monitored status information to the host computer. The host computer generates corresponding control commands based on the received status information and transmits them to the power distribution unit and / or power supply unit through the CAN bus to achieve centralized management and control of the entire distributed power supply.

[0040] The generator is a single-phase AC220V AC generator, and the DC generator output voltage is DC28V, high voltage DC360V, or the voltage required by the user; host computer (is an operation, maintenance and management device, which can be a PC, hereinafter referred to as host computer).

[0041] Please see Figure 3 Example 2: The power distribution assembly includes: a power detection circuit, a state estimation unit, a mode control unit, and a communication unit;

[0042] The power detection circuit is directly connected to the AC bus and transmits the real-time power information of the AC bus, including parameters such as current output power, voltage, and current, to the state estimation unit.

[0043] The state estimation unit receives the power information transmitted by the power detection circuit and the sum of the current output power of all power supply combinations, and calculates the difference between the rated output power of the AC bus and the sum of the current output power of all power supply combinations. The mode control unit is used to assess whether the current power supply is sufficient and whether the power supply source needs to be adjusted based on the difference calculated by the state estimation unit. Based on the calculation results of the state estimation unit, the mode control unit controls the power distribution combination to connect to one or more of the mains power, generator, and backup power as the power supply source.

[0044] When the mains power supply is sufficient and stable, it is prioritized for connection; when the mains power supply is insufficient or unstable, it automatically connects to the generator as a supplement or alternative; when neither the mains power nor the generator can meet the demand, it connects to the backup power supply to ensure the continuity of power supply; it adjusts the connected power supply source in real time to cope with the dynamic changes in the power demand of electrical equipment; the communication unit communicates with the state estimation unit, the mode control unit, and the CAN bus; it transmits the power difference calculated by the state estimation unit, the decision instructions of the mode control unit, and the operating status information of the power distribution combination; it receives feedback information from the power supply combination and the DC output unit for more precise power distribution and regulation; it communicates with other power distribution combinations, power supply combinations, and DC output units through the CAN bus to realize the collaborative work and intelligent management of the entire system.

[0045] Please see Figure 4 In Example 3, when the power distribution unit needs to connect to a backup power source (DC power supply), the current conversion module converts DC to AC to ensure that the power distribution unit can stably output AC power.

[0046] When the power distribution unit needs to connect to a backup power source, the inverter starts working, converting DC power to AC power; the ADC converter collects the instantaneous voltage of the AC bus in real time and converts it into a digital signal; the power acquisition module collects the power data of the AC bus and transmits it to the microcontroller; the microcontroller calculates the effective voltage of the AC bus based on the power data collected by the power acquisition module; the microcontroller calculates the voltage difference between the effective voltage and the instantaneous voltage of the AC bus, and calculates the current difference based on the voltage difference and the expected power value, i.e., the current difference is obtained by multiplying the voltage by the current, where the expected power value is the sum of the current output power of all power supply units minus the sum of the rated output power of the mains power and the generator. The calculated voltage and current differences are sent to the voltage loop and current loop respectively. The voltage loop generates a feedback signal based on the voltage difference and sends it to the current loop. The output of the current loop is connected to the input of the DAC converter. The output of the SPWM module is connected to the control terminal of the inverter for controlling the inverter. The microcontroller is connected to the CAN bus via the CAN unit for transmitting relevant instructions and data. The DAC converter converts the digital feedback signal output from the current loop into an analog signal for use by the SPWM module. The SPWM module generates a PWM signal based on the analog signal provided by the DAC converter. The PWM signal controls the switching devices of the inverter, thereby achieving precise regulation of the output voltage and current.

[0047] Please see Figure 5Example 4: The power supply combination includes: an AC filter module, N PFC modules, N DC / DC modules, an output filter module, an output detection module, a power regulation unit, a compensation control unit, an auxiliary power supply, a microcontroller, and a CAN communication module.

[0048] The AC filtering module's main function is to filter the input AC power to remove high-frequency noise and interference from the power grid, ensuring stable input to subsequent power conversion modules.

[0049] There are N PFC (Power Factor Correction) modules. The PFC modules are used to improve the power factor of the power system, reduce reactive power, and thus reduce grid losses. In this system, N PFC modules work in parallel, which can further improve the power handling capacity and reliability of the system.

[0050] N DC / DC modules are used to further convert the DC power converted by the PFC module into the required DC voltage level; paired with the PFC module, they form N AC / DC modules to jointly realize the AC to DC conversion.

[0051] The output filtering module filters the DC output from the DC / DC module to remove high-frequency noise and ripple, ensuring voltage stability on the DC bus.

[0052] Output detection module, which is used to detect power information on the DC bus.

[0053] The compensation control unit is used to calculate the compensation power based on the difference between the target power information of the power supply combination and the power information collected by the output detection module, and then transmit it to the microcontroller. The target power information of the power supply combination is set by the host computer. The user can input it into the host computer, which is then transmitted to the microcontroller via the CAN communication bus, and then the microcontroller transmits it to the compensation control unit.

[0054] The microcontroller is used to obtain the target power information of the power supply combination through the CAN communication unit and transmit it to the compensation control unit, which is the power information required by the power supply combination. It also obtains the compensation power calculated by the compensation control unit. When the compensation power is greater than a set threshold, the compensation control unit is controlled to reduce the output voltage of the DC / DC module, while the power regulation unit is controlled to increase the output current of the PFC module using open-loop control. When the compensation power is less than the threshold, the power regulation unit is controlled to slowly adjust the output current according to the compensation power value using closed-loop adaptive control, while the compensation control unit is controlled to restore the output voltage of the DC / DC module. When the output power of the power supply combination is stable and less than the rated power, the power regulation unit enters a low-power mode.

[0055] The auxiliary power supply (battery pack) provides the DC power required by other modules in the system. At the same time, the auxiliary power supply can be connected to the DC bus and controlled by the host computer through the CAN communication bus.

[0056] The microcontroller port of the power supply unit enables parallel control of four AC / DC power modules. The AC / DC power modules primarily convert AC input to DC output, consisting of an EMC filter circuit, a PFC (Power Factor Correction) circuit, a DC / DC isolation converter circuit, and a control circuit, forming an AC / DC structure. The core AC / DC module uses a general-purpose AC / DC power module with a rated output voltage of 28V, adjustable from 26V to 29V, and a maximum output current of 53A. To meet the power requirements of the DC power supply unit, this embodiment uses four AC / DC modules connected in parallel. The high-power power supply unit uses a 1.5kW AD / DC module, and the low-power power supply unit uses a 600W AD / DC module, achieving N+1 redundancy. In this embodiment, the PFC is controlled by a power adjustment unit to reduce the output voltage of the power supply unit, thus achieving energy balance among the power supply units. After energy balance is achieved, the DC / DC conversion module of the power supply unit is controlled by a compensation control unit to restore its output voltage.

[0057] Please see Figure 6 In Example 5, the DC output unit includes: multiple DC output branches; each DC output branch includes: a DC-DC module, a current loop n, a voltage loop n, a microcontroller, and a sampling module; the input terminal of the DC-DC module is connected to a DC bus; the output terminal of the DC-DC module is connected to an output load; the sampling module is used to acquire the instantaneous current at the output terminal of the DC-DC module through a Hall sensor and to calculate the output voltage at the output terminal of the DC-DC module through a loss resistor;

[0058] The microcontroller monitors and acquires the voltage and current values ​​at the output terminals of the DC-DC module in real time. It receives the output voltage and target power of the power supply combination via the communication module, using the output voltage as a reference voltage. The difference voltage is calculated between the reference voltage and the DC-DC module output voltage. The power output of the DC-DC module is calculated using the output voltage and current. The differential power is calculated based on the output power and target power of the power supply combination. The differential current is calculated based on the differential power and differential voltage. The differential voltage and differential current are sent to voltage loop n and current loop n, respectively, to control the DC-DC module and achieve power stability and load balancing. Current loop n generates a feedback signal based on the differential current and sends it to voltage loop n. Voltage loop n generates a PWM signal to control the output voltage of the DC-DC module. The communication module and microcontroller are connected to a CAN communication bus for transmitting relevant commands and data.

[0059] Applicable scenario 1: such as Figure 7 As shown, in the Magnetic Resonance and Image Processing Laboratory, when the Magnetic Resonance Test Area contains instruments (MRI scanner, high-voltage generator, imaging equipment, etc.) with instantaneous high-power devices, a separate power supply system is deployed, with the power distribution unit located near the high-power areas (Magnetic Resonance Test Area and Data Processing Area). The distributed power system deploys three buses: AC bus, DC bus, and CAN bus. These buses interconnect one 4KW power supply unit, two 10KW power supply units, and the power distribution unit. Battery packs and auxiliary power supplies are provided according to the laboratory's needs to expand the power supply capacity. Regarding energy control, since the instantaneous high-power devices are mainly distributed in the test area, during the power supply deployment phase, the initial configuration for energy balance of the power supply units is based on the power supply units in the test area. The rated output power of power supply unit 3 in the fire protection room area is controlled at 6KW through the host computer interface.

[0060] In summary, this invention, through the coordinated operation of a power distribution unit, a power supply unit, and a DC output unit, enables real-time monitoring and control of the power supply, ensuring a stable and reliable power supply for various high-precision equipment in the laboratory. The power distribution unit can connect to mains power, generators, and backup power as needed, adjusting the power supply source in real time to address dynamic changes in the power demands of the equipment. The power supply unit includes components such as an AC filter module, a PFC module, a DC / DC module, and an output filter module, ensuring stable and reliable DC output power to meet the high power quality requirements of high-precision equipment. The distributed power supply and control system transmits control commands, status, and data through a three-level control management architecture, achieving centralized management of the entire system. The power supply units are connected via a DC bus, enabling energy balancing and power regulation, ensuring balanced output power among the units, and allowing for intelligent power adjustment and energy distribution based on actual needs. This invention effectively saves energy and extends the lifespan of the power supplies, thus enabling centralized or distributed power supply applications.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A distributed power supply control system for high-power laboratories, characterized in that, include: Power distribution assembly, multiple power supply assemblies, and multiple DC output units; The power distribution assembly, multiple power supply assemblies, and multiple DC output units communicate with each other via a CAN bus; The power distribution assembly and the multiple power supply assemblies are connected via an AC bus; the output terminals of the multiple power supply assemblies are connected via a DC bus; each power supply assembly is connected to a corresponding DC output unit. The power distribution unit is used to convert the input power from the power supply source into 220V AC power and supply power to the power supply unit through the AC bus; wherein, the power supply source includes: mains power, generator and backup power; The power supply unit is used to convert AC power into DC power of 26V~29V to supply power to the DC output unit; The DC output unit uses a bidirectional Buck-Boost power module to achieve one DC input to multiple DC outputs, supplying power to electrical equipment; The power supply input of the power distribution assembly includes: When the sum of the current output power of all power supply combinations is greater than the rated output power of the mains power, the power distribution combination is simultaneously connected to the mains power and the generator as input power. When the sum of the current output power of all power supply combinations is greater than the sum of the rated output power of the mains power and the generator, the power distribution combination is simultaneously connected to the mains power, the generator, and the backup power supply as input power. When the sum of the current output power of all power supply combinations is less than the rated output power of the power distribution combination's input power, and when the output power required by the DC output unit corresponding to a certain power supply combination is greater than the rated output power of that power supply combination, the output voltage of the other power supply combinations is adjusted in the 26-29V range so that the other power supply combinations can perform energy balancing to that power supply combination through the DC bus until the output power requirement of that power supply combination is met. The power supply assembly includes: an AC filter module, N PFC modules, N DC / DC modules, an output filter module, an output detection module, a power regulation unit, a compensation control unit, an auxiliary power supply, a microcontroller, and a CAN communication module; The AC filtering module is used to filter the input AC power, and the output terminal of the AC filtering module is connected to the input terminal of the auxiliary power supply and the input terminals of N PFC modules. The output terminal of the auxiliary power supply is connected to a power regulation unit and a microcontroller to provide power. The power regulation unit is connected to the compensation control unit and N PFC modules respectively; N PFC modules and N DC / DC modules together form N AC / DC modules, which are used to convert alternating current to direct current. The output terminals of N DC / DC modules are connected to the input terminals of the output filter module to filter the output DC power. The output terminals of the output filter module are connected to the DC bus. The output detection module is used to detect the power of the DC bus; The output of the output detection module is connected to the compensation control unit; The compensation control unit is connected to the power regulation unit; the power compensation unit is connected to N DC / DC modules; the compensation control unit is used to calculate the compensation power based on the difference between the target power information of the power supply combination and the power information collected by the output detection module, and transmit it to the microcontroller; the target power information of the power supply combination is set by the host computer, transmitted to the microcontroller via the CAN communication bus, and then transmitted to the compensation control unit by the microcontroller. The microcontroller connects the power regulation unit and the compensation control unit. The microcontroller obtains the target power information of the power supply combination via the CAN communication unit and transmits it to the compensation control unit, which contains the power information required by the power supply combination. It also obtains the compensation power calculated by the compensation control unit. When the compensation power exceeds a set threshold, the compensation control unit lowers the output voltage of the DC / DC module, while the power regulation unit increases the output current of the PFC module using open-loop control. When the compensation power is less than the threshold, the power regulation unit slowly adjusts the output current according to the compensation power value using closed-loop adaptive control, while the compensation control unit restores the output voltage of the DC / DC module. When the output power of the power supply combination is stable and less than the rated power, the power regulation unit enters a low-power mode. The CAN communication module connects the auxiliary power supply, power regulation unit, microcontroller, and compensation control unit, and is used to transmit relevant commands and data.

2. A distributed power supply control system for a high-power laboratory according to claim 1, characterized in that, The power distribution unit includes: a power detection circuit, a state estimation unit, a mode control unit, and a communication unit; the power detection circuit is used to collect the output power information of the power distribution unit from the AC bus; the state estimation unit is used to calculate the difference between the output power of the power distribution unit and its rated power; the mode control unit is used to control the power distribution unit to connect to one or more of the mains power, generator, and backup power source as a power supply source based on the difference calculated by the state estimation unit; the communication unit communicates with the state estimation unit, the mode control unit, and the CAN bus to transmit relevant instructions and data.

3. A distributed power supply control system for a high-power laboratory according to claim 2, characterized in that, The backup power supply is a DC power supply source. When the power distribution unit needs to connect to the backup power supply as a power supply source, the DC power output by the backup power supply must first be converted into AC power through the following current conversion module; the current conversion module includes: inverter, SPWM module, DAC converter, current loop, voltage loop, ADC converter, microcontroller, CAN unit and power acquisition module; The inverter's input terminal is connected to the output terminal of the backup power supply to convert DC to AC; the inverter's output terminal is connected to the AC bus; the ADC converter is used to acquire the instantaneous voltage of the AC bus; the power acquisition module is used to acquire the power information of the AC bus; the microcontroller is used to calculate the effective voltage of the AC bus based on the power acquired by the power acquisition module; the microcontroller is used to calculate the voltage difference between the effective voltage and the instantaneous voltage of the AC bus, and to calculate the current difference based on the voltage difference and the expected power value, where the expected power value is the sum of the current output power of all power supply combinations minus the sum of the rated output power of the mains power and the generator, and sends the calculated voltage difference and current difference to the voltage loop and the current loop respectively; the voltage loop generates a feedback signal based on the voltage difference and sends it to the current loop; the output terminal of the current loop is connected to the input terminal of the DAC converter; the output terminal of the SPWM module is connected to the control terminal of the inverter for controlling the inverter; the microcontroller is connected to the CAN bus through the CAN unit for transmitting relevant instructions and data.

4. A distributed power supply control system for a high-power laboratory according to claim 1, characterized in that, The DC output unit includes: multiple DC output branches; each DC output branch includes: a DC-DC module, a current loop n, a voltage loop n, a microcontroller, and a sampling module; the input terminal of the DC-DC module is connected to a DC bus; the output terminal of the DC-DC module is connected to an output load; the sampling module is used to acquire the instantaneous current at the output terminal of the DC-DC module through a Hall sensor and to calculate the output voltage at the output terminal of the DC-DC module through a loss resistor; The microcontroller monitors and acquires the voltage and current values ​​at the output terminals of the DC-DC module in real time. It receives the output voltage and target power of the power supply combination via the communication module, using the output voltage as a reference voltage. The difference voltage is calculated between the reference voltage and the DC-DC module output voltage. The power output of the DC-DC module is calculated using the output voltage and current. The differential power is calculated based on the output power and target power of the power supply combination. The differential current is calculated based on the differential power and differential voltage. The differential voltage and differential current are sent to voltage loop n and current loop n, respectively, to control the DC-DC module and achieve power stability and load balancing. Current loop n generates a feedback signal based on the differential current and sends it to voltage loop n. Voltage loop n generates a PWM signal to control the output voltage of the DC-DC module. The communication module and microcontroller are connected to a CAN communication bus for transmitting relevant commands and data.

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