A full-dc power supply system of a wind power plant data center and storage medium

Abstract

The application relates to the technical field of data center power supply, and discloses a full-direct-current power supply system of a wind power station data center and a storage medium. The system comprises a wind turbine group, a rectification power conversion cabinet, a high-voltage direct-current bus, an energy storage battery array and multiple groups of high-voltage direct-current-to-low-voltage direct-current converters. The wind turbine group generates alternating current, which is converted into high-voltage direct current of a nominal voltage by the rectification power conversion cabinet and is transmitted to the high-voltage direct-current bus on the data center side. The energy storage battery array is connected to the high-voltage direct-current bus and is used for energy buffering. The multiple groups of parallel high-voltage direct-current-to-low-voltage direct-current converters take power from the bus and convert the power into low-voltage direct current of different voltage grades, which is directly supplied to various loads of the data center through direct-current input interfaces of the equipment. The system realizes local direct-current conversion and direct utilization of wind power, builds a full-direct-current power supply path from power generation to power utilization, and improves energy utilization efficiency and system reliability.

Description

Technical Field

[0001] This invention relates to the field of data center power supply technology, specifically to a wind power station data center all-DC power supply system and storage medium. Background Technology

[0002] Traditional wind farms and data centers typically operate as independent entities. The AC power generated by the wind farm needs to be boosted, connected to the grid, and transmitted over long distances before being stepped down and distributed to the data center. To ensure power reliability, data centers generally use AC mains power from the grid as their primary power source. After entering the data center, the mains power undergoes AC-DC conversion, filtering, and voltage regulation by an uninterruptible power supply (UPS) system, which also charges backup batteries. Finally, the server power modules convert the AC power back into various low-voltage DC power requirements for the equipment. This conventional power supply path is lengthy, involving multiple energy conversions. Wind power generation is inherently intermittent and fluctuating; its output power is directly related to wind resource conditions and is difficult to synchronize with the grid's stable frequency and voltage requirements. When wind power fluctuates or is excessive, traditional methods struggle to achieve efficient local energy consumption, often leading to wind curtailment. While data center loads are relatively stable, their power supply architecture is based on AC distribution, and their internal equipment inherently consumes DC power. Existing technologies involve numerous redundant AC-DC conversion steps. From wind turbines to server chips, electrical energy undergoes multiple transformations, including AC generation at the wind turbine, grid-connected AC transmission, AC / DC conversion in the data center, and internal AC / DC conversion within the equipment. Each stage of transformation involves energy loss, reducing overall energy efficiency. Furthermore, the reliability of data center power supply systems heavily depends on the stability of the external power grid. Constructing a power supply architecture that simplifies energy conversion paths, increases the local utilization rate of wind power, and optimizes data center energy efficiency is a current challenge. Summary of the Invention

[0003] The purpose of this invention is to provide a wind power station data center all-DC power supply system and storage medium to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides a wind power station data center all-DC power supply system, the system comprising: Wind turbine clusters, deployed at wind power stations, are used to generate alternating current (AC). A rectifier power conversion cabinet is connected to the wind turbine generator group and is used to receive the AC power generated by the wind turbine generator group and convert the input AC power into high voltage DC power of the nominal voltage. A high-voltage DC bus, deployed on the data center side, is used to collect and distribute electrical energy and is connected to the rectifier power conversion cabinet to receive the high-voltage DC power of the nominal voltage; An energy storage battery array is connected to the high-voltage DC bus. The energy storage battery array includes a battery management system for managing the charging and discharging process of the energy storage battery array. Multiple sets of high-voltage DC to low-voltage DC converters are connected to the high-voltage DC bus to draw power from the high-voltage DC bus. Each set of high-voltage DC to low-voltage DC converters converts the high-voltage DC power provided by the high-voltage DC bus at the nominal voltage into low-voltage DC power at different voltage levels required by the corresponding load. Multiple DC input interfaces are configured to be connected to the power input terminals of data center computing devices, network devices, and storage devices, respectively, for receiving low-voltage DC power of different voltage levels from the high-voltage DC to low-voltage DC converter, and outputting the low-voltage DC power of different voltage levels to the data center computing devices, network devices, and storage devices, respectively.

[0005] Preferably, the rectifier power converter converts the input AC power into high-voltage DC power at the nominal voltage, including: The multiple AC power outputs from the wind turbine generator group are each connected to the three-phase rectifier bridge arm corresponding to one of the AC power outputs inside the rectifier power conversion cabinet. Each of the three-phase rectifier bridge arms performs full-wave rectification on the incoming AC power, converting the sinusoidal AC power into pulsating DC power. The multiple pulsating DC currents inside the rectifier power converter cabinet are fed into a common DC filter and voltage regulator circuit. The DC filter and voltage regulator circuit filters the incoming pulsating DC power to eliminate voltage ripple, and uses voltage closed-loop control to stabilize the output voltage at a preset nominal voltage value. The DC filter and voltage regulator circuit outputs the processed stable DC power to the high-voltage DC bus through the output terminal.

[0006] Preferably, the high-voltage DC bus is connected to the rectifier power converter cabinet to receive the nominal voltage high-voltage DC power, including: The high-voltage DC bus adopts a positive and negative dual conductor structure, which includes a positive bus and a negative bus. The positive bus and the negative bus are fixed in parallel by an insulating bracket. At the input terminals of the positive bus and the negative bus, a bus access switch and a reverse current protection diode are provided. The reverse current protection diode is used to prevent current from flowing in reverse from the high voltage DC bus to the rectifier power converter cabinet. The high voltage DC power from the nominal voltage of the rectifier power converter cabinet is connected to the positive busbar through the busbar access switch and the anti-reverse current diode, and the negative terminal of the high voltage DC power is directly connected to the negative busbar. The high-voltage DC bus has multiple electrical connection points along its route as equipotential power supply access points. Each equipotential power supply access point includes a positive connection terminal led out from the positive bus and a negative connection terminal led out from the negative bus, for connecting loads or power conversion equipment.

[0007] Preferably, the battery management system manages the charging and discharging process of the energy storage battery array, including: The battery management system continuously collects the voltage and temperature of each series-connected battery cell in the energy storage battery array and the total current of the energy storage battery array. The battery management system determines the consistency of voltage between batteries based on the collected voltage of each series-connected battery. When the voltage of any battery exceeds the preset normal voltage range, the equalization circuit is activated to perform energy transfer operation on the battery with abnormal voltage. When the power generation of the wind turbine cluster is greater than the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform a charging operation. The charging current value is determined jointly based on the voltage margin of the high-voltage DC bus and the state of charge of the battery. When the power generation of the wind turbine cluster is less than the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform a discharge operation. The discharge current value is dynamically adjusted according to the real-time size of the power gap in order to maintain the stability of the high voltage DC bus voltage.

[0008] Preferably, the high-voltage DC to low-voltage DC converter draws power from the high-voltage DC bus, including: The DC input port of each of the high-voltage DC to low-voltage DC converters is connected to the nearest equipotential power supply access point of the high-voltage DC bus via a line. At the DC input port of each of the high-voltage DC to low-voltage DC converters, an input fuse and an input contactor are connected in series. The input fuse is used for overcurrent protection, and the input contactor is used for remote or local control of power supply on / off. When the input contactor is closed, the front-stage filter capacitor inside the high-voltage DC to low-voltage DC converter begins to absorb electrical energy from the high-voltage DC bus and is charged. The input voltage sampling circuit inside the high-voltage DC to low-voltage DC converter starts working, monitoring the voltage value of the high-voltage DC bus in real time, and transmitting the monitored voltage value to the internal control core of the high-voltage DC to low-voltage DC converter.

[0009] Preferably, the high-voltage DC to low-voltage DC converter converts the high-voltage DC power supplied by the high-voltage DC bus at the nominal voltage into low-voltage DC power at different voltage levels required by the corresponding load, including: The internal control core of the converter receives the voltage value of the high-voltage DC bus transmitted by the input voltage sampling circuit, and receives the output terminal voltage value fed back from the output voltage sampling circuit. The internal control core compares the output voltage value fed back by the output voltage sampling circuit with the preset target output voltage value and calculates the voltage error signal. The internal control core generates a pulse width modulation drive signal with a corresponding duty cycle based on the voltage error signal, and sends the pulse width modulation drive signal to the main power switch. The main power switch performs high-frequency switching action according to the pulse width modulation drive signal, chopping the input high-voltage DC current into a high-frequency AC square wave; The high-frequency AC square wave undergoes voltage transformation and electrical isolation through a high-frequency isolation transformer, and then passes through an output rectification and filtering circuit to obtain smooth and stable low-voltage DC power of different voltage levels.

[0010] Preferably, the system further includes steps for scheduling and managing DC power within the data center: A centralized energy management server is deployed, which establishes data connections with the rectifier power conversion cabinet, the battery management system, and all high-voltage DC to low-voltage DC converters through a communication network; The centralized energy management server receives and aggregates real-time power generation data of the wind turbine generator group, real-time charging and discharging power and state of charge data of the energy storage battery array, and real-time power consumption data of each power consumption zone of the data center. The centralized energy management server calculates the real-time net power difference of the high-voltage DC bus based on the aggregated real-time data. The real-time net power difference is the difference between the total power generation and the total power consumption. Based on the real-time net power difference and the state of charge data of the energy storage battery array, the centralized energy management server generates real-time power scheduling instructions. The power scheduling command is sent to the battery management system, which dynamically adjusts the charging and discharging power of the energy storage battery array according to the command in order to balance the power flow on the high-voltage DC bus.

[0011] Preferably, the centralized energy management server generates real-time power scheduling instructions, including: When the real-time power net difference is positive and the state of charge data of the energy storage battery array is less than the full charge threshold, the centralized energy management server generates a charging scheduling instruction, which includes a suggested charging power value. When the real-time net power difference is positive, but the state of charge data of the energy storage battery array is greater than or equal to the full charge threshold, the centralized energy management server generates a consumption scheduling instruction. The consumption scheduling instruction is used to instruct the activation of adjustable loads in the data center to increase power consumption. When the real-time net power difference is negative and the state of charge data of the energy storage battery array is greater than the discharge threshold, the centralized energy management server generates a discharge scheduling instruction, which includes a discharge power value that satisfies the power gap. When the real-time power net difference is negative, but the state of charge data of the energy storage battery array is less than or equal to the discharge threshold, the centralized energy management server generates a load reduction scheduling instruction, which is used to instruct the non-critical loads in the data center to be powered down in stages.

[0012] Preferably, the system further includes establishing a hierarchical protection mechanism between the high-voltage DC bus and the data center load: A DC frame circuit breaker is deployed at the main incoming line of the high-voltage DC bus. The DC frame circuit breaker is used to quickly disconnect the main power supply when a serious short-circuit fault occurs on the bus. On the downstream branch circuit of each equipotential power supply access point, a DC miniature circuit breaker is deployed to protect the lines and equipment of the branch circuit where the DC miniature circuit breaker is located from damage by overload or short-circuit current. At the DC output terminal of each high-voltage DC to low-voltage DC converter, an output overvoltage protection circuit and an output overcurrent protection circuit are provided. The output overvoltage protection circuit and the output overcurrent protection circuit are used to protect the low-voltage DC load equipment in the downstream stage. Establish a tiered coordination logic for protection actions, so that the DC miniature circuit breaker closest to the fault point operates first, and the DC frame circuit breaker acts last as backup protection, to ensure that the scope of the fault impact is minimized.

[0013] Preferably, the present invention further includes a storage medium storing a computer program, which, when executed by a processor, implements the functions of the above-described all-DC power supply system for a wind power station data center.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The system employs a rectifier power conversion cabinet directly connected to the wind turbine generator group, converting the generated AC power into nominal high-voltage direct current (HVDC). This HVDC power is then directly deployed at the data center side for power aggregation and distribution via a high-voltage direct current bus. This architecture eliminates the need for wind power grid connection and long-distance AC transmission, achieving tight electrical coupling between the power generation and consumption units. Wind power can be directly fed into the data center load via the HVDC bus, shortening the energy transmission path and reducing losses caused by grid synchronization, voltage boosting / buckling, and line transmission. This allows wind energy to be utilized directly and efficiently at its generation site, improving local wind power absorption capacity, reducing wind curtailment due to power fluctuations or mismatches, and enhancing the system's utilization of renewable energy. Power is aggregated via the HVDC bus and connected to multiple sets of HVDC-to-low-voltage DC converters. Each converter independently converts the HVDC power into the specific low-voltage DC power required by its corresponding load, directly powering computing, network, and storage devices through the device's DC input interface. This power distribution mode eliminates the traditional AC distribution bus and its associated massive AC uninterruptible power supply (UPS) system. It reduces the number of AC / DC conversion stages from the mains input to the server motherboard, particularly eliminating the high-power centralized AC / DC conversion stages found in data center server rooms. The path of power from the high-voltage DC bus to the device chips is more direct, reducing the number of intermediate conversions and thus lowering the no-load and load losses of each converter stage, improving overall power utilization efficiency from source to load. The all-DC architecture simplifies the power supply system topology, reduces the number of passive components such as transformers and filters, and lowers system complexity and potential failure points. Attached Figure Description

[0015] Figure 1 This is a timing diagram of the all-DC power supply system for the wind power station data center described in this invention; Figure 2 A flowchart for receiving high-voltage direct current on a high-voltage direct current bus. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1This invention provides a full DC power supply system for a wind power station data center, the overall implementation of which is as follows: The system includes a wind turbine generator group deployed in the wind power station to generate AC power. The wind turbine generator group is connected to a rectifier power converter cabinet, which receives the AC power generated by the wind turbine generator group and converts it into high-voltage DC power at the nominal voltage. A high-voltage DC bus is deployed on the data center side for collecting and distributing electrical energy. The high-voltage DC bus is connected to the rectifier power converter cabinet to receive the high-voltage DC power at the nominal voltage. An energy storage battery array is connected to the high-voltage DC bus. The energy storage battery array includes a battery management system, which manages the charging and discharging process of the energy storage battery array. Multiple sets of high-voltage DC to low-voltage DC converters are connected in parallel on the high-voltage DC bus to draw power from the high-voltage DC bus. Each set of high-voltage DC to low-voltage DC converters converts the high-voltage DC power at the nominal voltage provided by the high-voltage DC bus into low-voltage DC power at different voltage levels required by the corresponding load. The computing devices, network devices, and storage devices in the data center are each equipped with multiple DC input interfaces at their power input terminals. These DC input interfaces are used to receive low-voltage DC power of different voltage levels from the high-voltage DC to low-voltage DC converter.

[0018] See Figure 2 In one embodiment of the present invention, the multiple AC power outputs from the wind turbine generator group are each connected to multiple three-phase rectifier bridge arms corresponding to one AC power output inside the rectifier power conversion cabinet. Each three-phase rectifier bridge arm performs full-wave rectification on the connected AC power output, converting the sinusoidal AC power into pulsating DC power. The multiple pulsating DC power outputs inside the rectifier power conversion cabinet are fed into a common DC filter and voltage regulator circuit. The DC filter and voltage regulator circuit filters the fed-in pulsating DC power to eliminate voltage ripple and uses voltage closed-loop control to stabilize the output voltage at a preset nominal voltage value. The DC filter and voltage regulator circuit outputs the processed stable DC power to the high-voltage DC bus through the output terminals. The high-voltage DC bus adopts a positive and negative dual-conductor structure, which includes a positive bus and a negative bus, which are fixed in parallel by insulating supports. Busbar connection switches and anti-reverse current diodes are installed at the input terminals of the positive and negative busbars. The anti-reverse current diodes prevent current from flowing backward from the high-voltage DC busbar to the rectifier power converter cabinet. The high-voltage DC power from the rectifier power converter cabinet has its positive terminal connected to the positive busbar via the busbar connection switch and anti-reverse current diodes, while its negative terminal is directly connected to the negative busbar. Multiple electrical connection points are installed along the high-voltage DC busbar as equipotential bonding points. Each equipotential bonding point includes a positive connection terminal led from the positive busbar and a negative connection terminal led from the negative busbar for connecting loads or power conversion equipment.

[0019] In practice, the wind turbine cluster deployed in the wind power station consists of multiple independent wind turbine generators. In practice, the AC power output of the wind turbine cluster is multiple three-phase AC power. In practice, each three-phase AC power is introduced into an independent three-phase rectifier bridge arm inside the rectifier power conversion cabinet. Each three-phase rectifier bridge arm is composed of multiple power diodes. The power diodes perform full-wave rectification on the input sinusoidal AC power. The full-wave rectification operation converts the sinusoidal AC power into DC power with periodic pulsating characteristics. In practical implementation, the multi-channel pulsating DC power outputs from all three-phase rectifier bridge arms inside the rectifier power converter cabinet are connected in parallel and combined to the input terminal of a common DC filter and voltage regulator circuit. This DC filter and voltage regulator circuit includes an LC filter network composed of inductors and capacitors. The LC filter network filters the incoming pulsating DC power to eliminate voltage ripple. It can be understood that the DC filter and voltage regulator circuit also includes a voltage closed-loop control loop. This loop acquires the output voltage value of the DC filter and voltage regulator circuit and compares it with an internally set nominal voltage reference value. The voltage closed-loop control circuit compares the voltage outputs and dynamically adjusts the output of the pre-regulator based on the comparison results, stabilizing the output voltage of the DC filter and voltage regulator circuit at a preset nominal voltage value, such as 750 volts DC. The DC filter and voltage regulator circuit then outputs the processed stable DC power through its output terminals to the high-voltage DC bus deployed on the data center side.

[0020] In some embodiments, the high-voltage DC bus adopts a positive and negative dual-conductor structure, which consists of a positive bus and a negative bus. The positive and negative bus are rectangular copper conductive bars. It is understood that the positive and negative bus are kept parallel and fixed within the cabinet by insulating supports, which ensure sufficient electrical clearance and creepage distance between the positive and negative bus and between the bus and the grounding electrode. At the power input end of the high-voltage DC bus, i.e., the initial connection position of the positive and negative bus, a bus access switch and a reverse-current protection diode are installed. The bus access switch is a DC circuit breaker with remote tripping function. The reverse-current protection diode is a high-power semiconductor device, with its cathode facing the positive bus side of the high-voltage DC bus and its anode facing the rectifier power conversion cabinet side. This connection direction of the reverse-current protection diode is used to prevent current from flowing backward from the high-voltage DC bus to the rectifier power conversion cabinet. The positive output cable of the high voltage DC power from the rectifier power converter cabinet is connected in series with the bus access switch and the anti-reverse current diode, and finally connected to the positive bus of the high voltage DC bus. The negative output cable of the high voltage DC power from the rectifier power converter cabinet is directly connected to the negative bus of the high voltage DC bus.

[0021] Optionally, the high-voltage DC bus is laid with multiple electrical connection points at fixed intervals along the data center server room's power distribution cabinets as equipotential bonding access points. Each equipotential bonding access point is an electrical connection terminal directly led out from the positive and negative busbars via bolts, and each equipotential bonding access point has the same ground potential. In specific implementations, the equipotential bonding access points are used to connect the input cables of loads or power conversion equipment such as high-voltage DC to low-voltage DC converters. For example, in a data center server room containing two rows of cabinets, the high-voltage DC bus is laid along the top of the passage between the two rows of cabinets, and an equipotential bonding access point is set at the corresponding position of each set of cabinets. The positive and negative input cables of each set of high-voltage DC to low-voltage DC converters are connected to the positive and negative terminals of the nearest equipotential bonding access point, respectively. The regulation process of the voltage closed-loop control circuit can be described by the following formula:

[0022] in, This indicates the duty cycle adjustment amount of the pulse width modulation signal. It is the proportional adjustment coefficient. It is the integral adjustment coefficient. This is the nominal voltage reference value. This is a sampled value of the output voltage of the DC filter and voltage regulator circuit. In some embodiments, the spacing of the equipotential power supply access points is determined based on the rack density and expected load power density within the data center server room, and the current-carrying capacity of the equipotential power supply access points needs to be greater than the maximum input current requirement of the connected load. Optionally, a DC disconnect switch can be connected in series upstream of the bus access switch. The DC disconnect switch is used to achieve electrical isolation of the high-voltage DC bus section during system maintenance.

[0023] In one embodiment of the present invention, the battery management system continuously collects the voltage, temperature, and total current of each series-connected battery cell in the energy storage battery array. The battery management system determines the voltage consistency between batteries based on the collected voltage of each series-connected battery cell. When any battery cell's voltage exceeds a preset normal voltage range, an equalization circuit is activated to perform energy transfer operations on the abnormally voltageed battery. When the power generation of the wind turbine cluster is greater than the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform a charging operation. The charging current value is determined jointly based on the voltage margin of the high-voltage DC bus and the battery's state of charge. When the power generation of the wind turbine cluster is less than the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform a discharging operation. The discharging current value is dynamically adjusted according to the real-time magnitude of the power deficit to maintain the stability of the high-voltage DC bus voltage. The DC input port of each high-voltage DC to low-voltage DC converter is connected to the nearest equipotential power supply access point of the high-voltage DC bus via a line. An input fuse and an input contactor are connected in series at the DC input port of each high-voltage DC-DC converter. The input fuse is used for overcurrent protection, and the input contactor is used for remote or local control of power supply on / off. When the input contactor closes, the pre-stage filter capacitor inside the high-voltage DC-DC converter begins to absorb electrical energy from the high-voltage DC bus and is charged. The input voltage sampling circuit inside the high-voltage DC-DC converter starts working and monitors the voltage value of the high-voltage DC bus in real time, transmitting the monitored voltage value to the internal control core of the high-voltage DC-DC converter.

[0024] In practice, the battery management system (BMS) continuously collects the voltage, temperature, and total current of each series-connected cell in the energy storage battery array. The battery array uses a battery pack composed of multiple lithium-ion cells connected in series. The BMS collects the voltage of each series-connected cell by connecting a voltage sampling line to the positive and negative terminals of the cells. It also collects the temperature of each cell using a temperature sensor mounted on the cell surface and the total current of the energy storage battery array using a Hall current sensor connected in series in the overall circuit. Based on the collected voltage data of each series-connected cell, the BMS determines the voltage consistency between the cells. The preset normal voltage range is between 2.5 volts and 3.65 volts for a single cell. When any cell's voltage is detected to be less than 2.5 volts or greater than 3.65 volts, the BMS determines that the voltage of that series-connected cell is abnormal. The BMS then activates an balancing circuit to transfer energy from the cell with the abnormal voltage. This balancing circuit is an active balancing topology circuit, which uses energy storage elements and high-frequency switches to transfer energy from the cell with the higher voltage to the cell with the lower voltage.

[0025] When the power output of the wind turbine cluster exceeds the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform charging operations. The charging current value is determined jointly based on the voltage margin of the high-voltage DC bus and the battery's state of charge (SOC). The voltage margin of the high-voltage DC bus refers to the difference between the actual voltage and the nominal voltage of the high-voltage DC bus, while the SOC is the percentage of the battery's current remaining capacity relative to its rated capacity. The charging current value... It is determined by the following relation:

[0026] in, It is the charging current value set by the battery management system. This is the actual voltage of the high-voltage DC bus. This is the nominal voltage of the high-voltage DC bus. It is the state of charge corresponding to the full charge threshold. It is the battery's current state of charge. and These are weighting coefficients. and This is a pre-set positive coefficient. When the power output of the wind turbine cluster is less than the total power consumed by the data center load, the battery management system controls the energy storage battery array to discharge. The discharge current value is dynamically adjusted according to the real-time magnitude of the power gap to maintain the stability of the high-voltage DC bus voltage. The power gap is the difference between the total power consumed by the data center load and the power output of the wind turbine cluster. In some embodiments, the battery management system changes the discharge current value by adjusting the power setpoint of the bidirectional DC-DC converter in the output circuit of the energy storage battery array. The adjustment rate of the discharge current value is proportional to the rate of change of the power gap. The energy storage battery array is connected to the high-voltage DC bus through a bidirectional DC-DC converter. The battery management system manages the charging or discharging operation of the energy storage battery array by controlling the operating state and power flow direction of the bidirectional DC-DC converter.

[0027] Each high-voltage DC-DC to low-voltage DC converter's DC input port is connected to the nearest equipotential power supply point on the high-voltage DC bus via a line. In practice, the connection line uses flame-retardant DC cables with a cross-sectional area meeting the current-carrying capacity requirements. An input fuse and an input contactor are connected in series at the DC input port of each high-voltage DC-DC converter. The input fuse is used for overcurrent protection, and the input contactor is used for remote or local control of power supply switching. The input fuse is a high-breaking-capacity DC fuse, and its rated current value is determined based on the maximum input current of the high-voltage DC-DC to low-voltage DC converter. The input contactor is a DC electromagnetic contactor that receives remote control signals from the data center monitoring system or local manual operation signals. When the input contactor closes, the pre-stage filter capacitor inside the high-voltage DC-DC to low-voltage DC converter begins to absorb electrical energy from the high-voltage DC bus and is charged. The pre-stage filter capacitor is an electrolytic capacitor or a film capacitor. The input voltage sampling circuit inside the high-voltage DC-DC to low-voltage DC-DC converter starts working and monitors the voltage value of the high-voltage DC bus in real time. This input voltage sampling circuit can be understood as a combination of a resistor divider network and an isolated operational amplifier. The input voltage sampling circuit transmits the monitored voltage value to the internal control core of the high-voltage DC-DC to low-voltage DC-DC converter. The internal control core is a digital signal processor or microcontroller.

[0028] Optionally, a pre-charge resistor and a series branch of the pre-charge contactor can be connected in parallel between the input fuse and the input contactor. The pre-charge resistor is used to limit the initial inrush current of the front-stage filter capacitor inside the high-voltage DC-DC converter. In some embodiments, the battery management system's process for determining battery consistency is periodic; the battery management system executes voltage acquisition and comparison logic for all series-connected batteries every 100 milliseconds. Optionally, the battery management system's balancing circuit is triggered when the battery voltage difference exceeds 50 millivolts, and the operating current of the balancing circuit is limited to within 1 ampere. Weighting coefficient and The values ​​are determined through system debugging, weighting coefficients and The value of determines the relative influence of voltage margin and state of charge on the charging current value.

[0029] In one embodiment of the present invention, the internal control core of the high-voltage DC to low-voltage DC converter receives the voltage value of the high-voltage DC bus transmitted by the input voltage sampling circuit and the output terminal voltage value fed back from the output voltage sampling circuit. The internal control core compares the output terminal voltage value fed back from the output voltage sampling circuit with a preset target output voltage value and calculates a voltage error signal. Based on the voltage error signal, the internal control core generates a pulse width modulation drive signal with a corresponding duty cycle and sends the pulse width modulation drive signal to the main power switch. The main power switch performs high-frequency switching action according to the pulse width modulation drive signal to chop the input high-voltage DC into a high-frequency AC square wave. The high-frequency AC square wave undergoes voltage transformation and electrical isolation through a high-frequency isolation transformer, and then passes through the output rectification and filtering circuit to obtain smooth and stable low-voltage DC at different voltage levels. A centralized energy management server is deployed, which establishes data connections with the rectifier power conversion cabinet, the battery management system, and all high-voltage DC to low-voltage DC converters through a communication network. The centralized energy management server receives and aggregates real-time power generation data from the wind turbine cluster, real-time charging and discharging power and state of charge data from the energy storage battery array, and real-time power consumption data from each power consumption zone of the data center. Based on the aggregated real-time data, the centralized energy management server calculates the real-time net power difference value of the high-voltage DC bus, which is the difference between total power generation and total power consumption. Based on the real-time net power difference value and the state of charge data of the energy storage battery array, the centralized energy management server generates real-time power dispatch instructions. These instructions are sent to the battery management system, which dynamically adjusts the charging and discharging power of the energy storage battery array to balance the power flow on the high-voltage DC bus.

[0030] In practical implementation, the internal control core of the high-voltage DC to low-voltage DC converter receives the voltage value of the high-voltage DC bus from the input voltage sampling circuit, and simultaneously receives the output voltage value fed back from the output voltage sampling circuit. The internal control core compares the output voltage value fed back from the output voltage sampling circuit with a preset target output voltage value stored in its memory, calculating the voltage error signal through subtraction. Based on the calculated voltage error signal, the internal control core uses a digital control algorithm to generate a pulse width modulation (PWM) drive signal with a corresponding duty cycle. This PWM drive signal is then sent to the main power switch transistor via an isolation drive circuit. The main power switch transistor is an insulated-gate bipolar transistor (IGBT) or a metal-oxide-semiconductor (MOSFET). The main power switch transistor performs high-frequency switching based on the received PWM drive signal, chopping the input high-voltage DC into a high-frequency AC square wave. This high-frequency AC square wave is fed into the primary winding of a high-frequency isolation transformer, which performs voltage transformation and electrical isolation. The secondary winding of the high-frequency isolation transformer outputs the transformed AC. The alternating current (AC) output from the secondary winding of the high-frequency isolation transformer passes through an output rectifier circuit composed of fast recovery diodes or synchronous rectifier tubes. This output rectifier circuit converts the AC into unidirectional pulsating DC. The unidirectional pulsating DC then passes through an output filter circuit composed of inductors and capacitors, ultimately yielding a smooth and stable low-voltage DC of a specific voltage level that meets the load requirements, such as 48 volts or 12 volts. The duty cycle of the pulse width modulation (PWM) drive signal... The calculation is performed by the digital control algorithm of the internal control core. The digital control algorithm includes proportional-integral control, and its calculation relationship is as follows:

[0031] in, This indicates the pulse width modulation duty cycle of the current control cycle. This indicates the pulse width modulation duty cycle of the previous control cycle. This indicates the voltage error signal for the current control cycle. This indicates the voltage error signal from the previous control cycle. It is the proportional gain coefficient. It is the integral gain coefficient.

[0032] In some embodiments, a centralized energy management server is deployed. This server is an industrial computer equipped with energy management software. It establishes data connections with the rectifier power converter cabinet, battery management system, and all high-voltage DC-DC converters via a communication network. The communication network is an Ethernet or industrial fieldbus network. The centralized energy management server receives and aggregates real-time power generation data from the wind turbine cluster, real-time charge / discharge power and state-of-charge data from the energy storage battery array, and real-time power consumption data from each power consumption zone of the data center. The real-time power generation data from the wind turbine cluster is collected by the measurement and control unit within the rectifier power converter cabinet and uploaded via the communication network. The real-time charge / discharge power and state-of-charge data from the energy storage battery array are calculated and provided by the battery management system. The real-time power consumption data from each power consumption zone of the data center is measured and uploaded by the corresponding high-voltage DC-DC converter through its internal monitoring circuit. Based on the aggregated real-time data, the centralized energy management server executes a calculation program once per second to calculate the real-time net power difference value of the high-voltage DC bus. The formula for calculating the real-time net power difference is the total power generation of the wind turbine cluster. Subtract the total power consumption of each power zone in the data center ,Right now Based on the calculated real-time net power difference and the real-time state-of-charge data of the energy storage battery array obtained from the battery management system, the scheduling strategy module inside the centralized energy management server generates real-time power scheduling instructions. These instructions are data packets containing the target power value, action type, and timestamp. The generated power scheduling instructions are sent to the battery management system via the communication network. The battery management system's communication interface receives the instructions, and the main controller parses them, dynamically adjusting the charging and discharging power of the energy storage battery array according to the target power value. This adjustment balances the power flow on the high-voltage DC bus.

[0033] Optionally, communication between the centralized energy management server and the high-voltage DC-to-low-voltage DC converter adopts a publish-subscribe model. The high-voltage DC-to-low-voltage DC converter periodically publishes its load power data, and the centralized energy management server subscribes to this data. It can be understood that the centralized energy management server uses the total power consumption when calculating the real-time net power difference. This is the sum of the load power reported by all online high-voltage DC-to-low-voltage DC converters within the data center. In some embodiments, the centralized energy management server generates power scheduling commands every 200 milliseconds to ensure rapid response to power fluctuations. Optionally, in addition to being sent to the battery management system, the power scheduling commands can also be sent simultaneously to the rectifier power converter cabinet to fine-tune its output voltage setpoint to assist in power balancing. Voltage error signal It is the preset target output voltage value The output voltage value fed back by the output voltage sampling circuit The difference, i.e. This is understandable; the proportional gain coefficient... and integral gain coefficient The value is determined through the converter's loop compensation design to ensure the stability of the output voltage and the dynamic response speed.

[0034] In one embodiment of the present invention, when the real-time power net difference is positive and the state of charge (SOC) data of the energy storage battery array is less than the full charge threshold, the centralized energy management server generates a charging scheduling instruction, which includes a suggested charging power value. When the real-time power net difference is positive but the SOC data of the energy storage battery array is greater than or equal to the full charge threshold, the centralized energy management server generates a dissipation scheduling instruction, which instructs the activation of adjustable loads within the data center to increase power consumption. When the real-time power net difference is negative and the SOC data of the energy storage battery array is greater than the discharge threshold, the centralized energy management server generates a discharging scheduling instruction, which includes a discharge power value that satisfies the power deficit. When the real-time power net difference is negative but the SOC data of the energy storage battery array is less than or equal to the discharge threshold, the centralized energy management server generates a load reduction scheduling instruction, which instructs the tiered power-off of non-critical loads within the data center.

[0035] In practice, the scheduling strategy module inside the centralized energy management server is based on the calculated real-time net power difference. The system generates real-time power scheduling commands based on real-time state-of-charge data of the energy storage battery array obtained from the battery management system. The decision-making logic of the centralized energy management server executes different branches based on preset threshold conditions, including a full-charge threshold. and venting threshold When the real-time net power difference The state of charge data of the energy storage battery array is positive. Less than the full charge threshold At that time, the centralized energy management server generates a charging scheduling instruction, which includes a suggested charging power value. Recommended charging power value It is determined by the following formula:

[0036] in, It is the real-time net power difference value. This is the maximum charging power allowed by the energy storage battery array. It is the real-time state of charge data of the energy storage battery array. This refers to the full charge threshold. It can be understood that the charging scheduling command is sent to the battery management system via the communication network, and the battery management system parses the charging scheduling command and controls the energy storage battery array to... The power is used for charging. When the real-time net power difference value The state of charge data of the energy storage battery array is positive. Greater than or equal to the full charge threshold At this time, the centralized energy management server generates a power consumption scheduling instruction, which is used to instruct the activation of adjustable loads within the data center to increase power consumption. Adjustable loads include standby cooling units, battery test loads, or circulating pumps of immersion liquid cooling systems. The power consumption scheduling instruction contains the identifier of the adjustable load to be activated and the target operating power.

[0037] In some embodiments, when the real-time net power difference The state of charge data of the energy storage battery array is negative. Greater than the short-selling threshold At that time, the centralized energy management server generates a discharge scheduling command, which includes a discharge power value that satisfies the power deficit. The size of the power gap is Discharge power value The discharge power value is calculated by the centralized energy management server. This equals the smaller of the current absolute power deficit and the maximum available discharge power of the energy storage battery array. The centralized energy management server will contain the discharge power value. The discharge scheduling command is sent to the battery management system. When the real-time net power difference... The state of charge data of the energy storage battery array is negative. Less than or equal to the short-selling threshold At this time, the centralized energy management server generates a load reduction scheduling command, which instructs the non-critical loads within the data center to be powered down in stages. Non-critical loads are pre-classified into multiple priority levels, and the load reduction scheduling command contains the priority level information of the loads that need to be powered down. Based on the load reduction scheduling command, the centralized energy management server or the data center infrastructure management system working in conjunction with it sends a remote shutdown command to the high-voltage DC-DC converters of the specified priority. The thresholds and corresponding actions referenced by the centralized energy management server when executing different scheduling decisions are shown in Table 1 below: Table 1: Correspondence Table of Power Scheduling Decision Logic

[0038] Optional, full charge threshold Set to 95%, short-selling threshold Set to 20%. After the centralized energy management server generates a power consumption scheduling instruction, the start-up order of adjustable loads follows a preset priority list. In some embodiments, after the battery management system receives the discharge scheduling instruction, if the calculated discharge power value... If the instantaneous maximum allowable discharge power of the energy storage battery array is exceeded, the battery management system will discharge according to the instantaneous maximum allowable discharge power and inform the centralized energy management server of the actual discharge power via a communication message. Optionally, the centralized energy management server will have a warning delay before generating a load reduction scheduling command. During this warning delay, if the state-of-charge data of the energy storage battery array... If the power decreases further due to discharge to a lower threshold, a throttling operation is immediately performed. The maximum charging power in the formula... It is a dynamic parameter related to battery temperature and health status, which the centralized energy management server periodically obtains updated data from the battery management system. The value is used for calculation. It can be understood that the total target operating power specified in the power consumption scheduling instruction should be as close as possible to, but not exceed, the current real-time net power difference. .

[0039] In one embodiment of the invention, a DC frame circuit breaker is deployed at the main incoming line of the high-voltage DC bus. The DC frame circuit breaker is used to quickly disconnect the main power supply in the event of a severe short-circuit fault on the bus. A DC miniature circuit breaker is deployed on the downstream branch circuit of each equipotential power supply connection point. The DC miniature circuit breaker is used to protect the lines and equipment in the branch circuit where the DC miniature circuit breaker is located from damage caused by overload or short-circuit current. An output overvoltage protection circuit and an output overcurrent protection circuit are provided at the DC output terminal of each high-voltage DC-to-low-voltage DC converter. These circuits are used to protect the downstream low-voltage DC load equipment. A tiered coordination logic for protection actions is established so that the DC miniature circuit breaker closest to the fault point operates first, and the DC frame circuit breaker, as backup protection, operates last, ensuring that the scope of the fault's impact is minimized.

[0040] In practical implementation, a DC frame circuit breaker is deployed at the main incoming line of the high-voltage DC bus. This circuit breaker is used to quickly disconnect the main power supply in the event of a severe short-circuit fault on the bus. The DC frame circuit breaker is installed between the output of the rectifier power converter cabinet and the connection point of the positive busbar of the high-voltage DC bus. The rated current of the DC frame circuit breaker is selected based on the maximum design short-circuit current of the system, for example, a rated current of 1600 amps. The DC frame circuit breaker is equipped with an electronic trip unit capable of detecting overload long-delay, short-circuit short-delay, and instantaneous short-circuit currents. A DC miniature circuit breaker is deployed on the downstream branch circuit of each equipotential power supply connection point. This miniature circuit breaker protects the lines and equipment in the branch circuit where it is located from damage by overload or short-circuit current. The miniature circuit breaker is installed on the branch copper busbar leading from the equipotential power supply connection point. The rated current of the miniature circuit breaker is determined based on the maximum input current of the connected high-voltage DC to low-voltage DC converter, for example, a rated current of 63 amps. DC miniature circuit breakers use the thermal-magnetic tripping principle, and the breaking capacity of a DC miniature circuit breaker must be higher than the expected maximum short-circuit current at its installation point.

[0041] Each high-voltage DC-DC to low-voltage DC-DC converter is equipped with an output overvoltage protection circuit and an output overcurrent protection circuit at its DC output terminal. These circuits protect the downstream low-voltage DC load equipment. The output overvoltage protection circuit consists of a voltage comparator and a reference voltage source. The voltage comparator continuously monitors the DC output voltage of the high-voltage DC-DC to low-voltage DC-DC converter. When the DC output voltage exceeds the threshold value set by the reference voltage source, the voltage comparator output signal triggers the protection latch circuit and shuts down the pulse width modulation drive signal of the high-voltage DC-DC to low-voltage DC-DC converter. The output overcurrent protection circuit consists of a precision sampling resistor and a current-sensing amplifier. The precision sampling resistor is connected in series on the negative DC output bus of the high-voltage DC-DC to low-voltage DC-DC converter. The current-sensing amplifier amplifies the voltage difference across the precision sampling resistor. The amplified signal is compared with the overcurrent protection threshold voltage. When the amplified signal exceeds the overcurrent protection threshold voltage, the main power switch of the high-voltage DC-DC to low-voltage DC-DC converter is immediately shut down. It can be understood that the output overvoltage protection action threshold is set to 120% of the rated output voltage, and the output overcurrent protection action threshold is set to 150% of the rated output current.

[0042] A tiered coordination logic for protection actions is established so that the DC miniature circuit breaker closest to the fault point operates first, with the DC frame circuit breaker acting as backup and operating last, ensuring the fault's impact is minimized. This tiered coordination logic is achieved by setting the operating current and operating time of each circuit breaker. The instantaneous trip current setting value of the DC miniature circuit breaker is also specified. Less than the short-delay trip current setting value of the DC frame circuit breaker Short-delay tripping time of DC frame circuit breakers The setting value must be greater than the full breaking time of the DC miniature circuit breaker. The total breaking time includes the pre-arc time and arcing time of the circuit breaker, and their timing coordination must meet the following requirements:

[0043] in, This is the short-delay tripping time setting value for the DC frame circuit breaker. It is the total time from the occurrence of a fault to the complete extinction of the arc in a DC miniature circuit breaker. This refers to the differential coordination time margin. In some embodiments, the short-delay tripping time of the DC frame circuit breaker... The setting is 0.2 seconds, which is the total breaking time of the DC miniature circuit breaker. Typical value is 0.01 seconds, with a time margin for graded coordination. The time is set to 0.05 seconds. When a short-circuit fault occurs on the low-voltage DC load side downstream of the high-voltage DC-to-low-voltage DC converter, the fault current first flows through the output overcurrent protection circuit at the output terminal of the high-voltage DC-to-low-voltage DC converter. The output overcurrent protection circuit operates within microseconds and blocks the converter output. If the output overcurrent protection circuit fails, the rising fault current will cause the DC miniature circuit breaker on the branch circuit supplying power to the high-voltage DC-to-low-voltage DC converter to trip due to overcurrent. The operation of the DC miniature circuit breaker limits the fault to that branch circuit. Optionally, if the fault point occurs on the high-voltage DC bus or the DC miniature circuit breaker itself fails to disconnect, the fault current will continue to rise until it reaches the short-delay trip current setting value of the DC frame circuit breaker. The DC frame circuit breaker will trip after the preset short-delay trip time. The circuit breaker then trips, thereby disconnecting the main power supply. In some embodiments, the instantaneous tripping function of the DC frame circuit breaker is disabled, and the DC frame circuit breaker retains only short-delay tripping and long-delay overload protection functions to ensure selective coordination with downstream DC miniature circuit breakers. Optionally, a low-voltage DC fuse can be connected in series at the DC output of the high-voltage DC to low-voltage DC converter, serving as a backup protection element for the output overcurrent protection circuit. It is understood that the differential coordination time margin... The selection of circuit breakers needs to take into account manufacturing errors in the circuit breaker's operating time and variations in system circuit parameters.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wind power station data center all-DC power supply system, characterized in that, include: Wind turbine clusters, deployed at wind power stations, are used to generate alternating current (AC). A rectifier power conversion cabinet is connected to the wind turbine generator group and is used to receive the AC power generated by the wind turbine generator group and convert the input AC power into high voltage DC power of the nominal voltage. A high-voltage DC bus, deployed on the data center side, is used to collect and distribute electrical energy and is connected to the rectifier power conversion cabinet to receive the high-voltage DC power of the nominal voltage; An energy storage battery array is connected to the high-voltage DC bus. The energy storage battery array includes a battery management system for managing the charging and discharging process of the energy storage battery array. Multiple sets of high-voltage DC to low-voltage DC converters are connected to the high-voltage DC bus to draw power from the high-voltage DC bus. Each set of high-voltage DC to low-voltage DC converters converts the high-voltage DC power provided by the high-voltage DC bus at the nominal voltage into low-voltage DC power at different voltage levels required by the corresponding load. Multiple DC input interfaces are configured to be connected to the power input terminals of data center computing devices, network devices, and storage devices, respectively, for receiving low-voltage DC power of different voltage levels from the high-voltage DC to low-voltage DC converter, and outputting the low-voltage DC power of different voltage levels to the data center computing devices, network devices, and storage devices, respectively. It also includes steps for scheduling and managing DC power within the data center: A centralized energy management server is deployed, which establishes data connections with the rectifier power conversion cabinet, the battery management system, and all high-voltage DC to low-voltage DC converters through a communication network; The centralized energy management server receives and aggregates real-time power generation data of the wind turbine generator group, real-time charging and discharging power and state of charge data of the energy storage battery array, and real-time power consumption data of each power consumption zone of the data center. The centralized energy management server calculates the real-time net power difference of the high-voltage DC bus based on the aggregated real-time data. The real-time net power difference is the difference between the total power generation and the total power consumption. Based on the real-time net power difference and the state of charge data of the energy storage battery array, the centralized energy management server generates real-time power scheduling instructions. The power scheduling command is sent to the battery management system, which dynamically adjusts the charging and discharging power of the energy storage battery array according to the command in order to balance the power flow on the high voltage DC bus. The rectifier power converter cabinet converts the input AC power into high-voltage DC power at the nominal voltage, including: The multiple AC power outputs from the wind turbine generator group are each connected to the three-phase rectifier bridge arm corresponding to one of the AC power outputs inside the rectifier power conversion cabinet. Each of the three-phase rectifier bridge arms performs full-wave rectification on the incoming AC power, converting the sinusoidal AC power into pulsating DC power. The multiple pulsating DC currents inside the rectifier power converter cabinet are fed into a common DC filter and voltage regulator circuit. The DC filter and voltage regulator circuit filters the incoming pulsating DC power to eliminate voltage ripple, and uses voltage closed-loop control to stabilize the output voltage at a preset nominal voltage value. The DC filter and voltage regulator circuit outputs the processed stable DC power to the high-voltage DC bus through the output terminal; The high-voltage DC bus is connected to the rectifier power converter cabinet to receive the nominal voltage high-voltage DC power, including: The high-voltage DC bus adopts a positive and negative dual conductor structure, which includes a positive bus and a negative bus. The positive bus and the negative bus are fixed in parallel by an insulating bracket. At the input terminals of the positive bus and the negative bus, a bus access switch and a reverse current protection diode are provided. The reverse current protection diode is used to prevent current from flowing in reverse from the high voltage DC bus to the rectifier power converter cabinet. The high voltage DC power from the nominal voltage of the rectifier power converter cabinet is connected to the positive busbar through the busbar access switch and the anti-reverse current diode, and the negative terminal of the high voltage DC power is directly connected to the negative busbar. The high-voltage DC bus has multiple electrical connection points along its route as equipotential power supply access points. Each equipotential power supply access point includes a positive connection terminal led out from the positive bus and a negative connection terminal led out from the negative bus, for connecting loads or power conversion equipment.

2. The all-DC power supply system for a wind power station data center according to claim 1, characterized in that, The battery management system manages the charging and discharging process of the energy storage battery array, including: The battery management system continuously collects the voltage and temperature of each series-connected battery cell in the energy storage battery array and the total current of the energy storage battery array. The battery management system determines the consistency of voltage between batteries based on the collected voltage of each series-connected battery. When the voltage of any battery exceeds the preset normal voltage range, the equalization circuit is activated to perform energy transfer operation on the battery with abnormal voltage. When the power generation of the wind turbine cluster is greater than the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform a charging operation. The charging current value is determined jointly based on the voltage margin of the high-voltage DC bus and the state of charge of the battery. When the power generation of the wind turbine cluster is less than the total power consumed by the data center load, the battery management system controls the energy storage battery array to perform a discharge operation. The discharge current value is dynamically adjusted according to the real-time size of the power gap in order to maintain the stability of the high voltage DC bus voltage.

3. The all-DC power supply system for a wind power station data center according to claim 2, characterized in that, The high-voltage DC to low-voltage DC converter draws power from the high-voltage DC bus, including: The DC input port of each of the high-voltage DC to low-voltage DC converters is connected to the nearest equipotential power supply access point of the high-voltage DC bus via a line. At the DC input port of each of the high-voltage DC to low-voltage DC converters, an input fuse and an input contactor are connected in series. The input fuse is used for overcurrent protection, and the input contactor is used for remote or local control of power supply on / off. When the input contactor is closed, the front-stage filter capacitor inside the high-voltage DC to low-voltage DC converter begins to absorb electrical energy from the high-voltage DC bus and is charged. The input voltage sampling circuit inside the high-voltage DC to low-voltage DC converter starts working, monitoring the voltage value of the high-voltage DC bus in real time, and transmitting the monitored voltage value to the internal control core of the high-voltage DC to low-voltage DC converter.

4. A wind power station data center all-DC power supply system according to claim 3, characterized in that, The high-voltage DC to low-voltage DC converter converts the high-voltage DC power supplied by the high-voltage DC bus at the nominal voltage into low-voltage DC power at different voltage levels required by the corresponding load, including: The internal control core of the converter receives the voltage value of the high-voltage DC bus transmitted by the input voltage sampling circuit, and receives the output terminal voltage value fed back from the output voltage sampling circuit. The internal control core compares the output voltage value fed back by the output voltage sampling circuit with the preset target output voltage value and calculates the voltage error signal. The internal control core generates a pulse width modulation drive signal with a corresponding duty cycle based on the voltage error signal, and sends the pulse width modulation drive signal to the main power switch. The main power switch performs high-frequency switching action according to the pulse width modulation drive signal, chopping the input high-voltage DC current into a high-frequency AC square wave; The high-frequency AC square wave undergoes voltage transformation and electrical isolation through a high-frequency isolation transformer, and then passes through an output rectification and filtering circuit to obtain smooth and stable low-voltage DC power of different voltage levels.

5. A wind power station data center all-DC power supply system according to claim 4, characterized in that, The centralized energy management server generates real-time power scheduling instructions, including: When the real-time power net difference is positive and the state of charge data of the energy storage battery array is less than the full charge threshold, the centralized energy management server generates a charging scheduling instruction, which includes a suggested charging power value. When the real-time net power difference is positive, but the state of charge data of the energy storage battery array is greater than or equal to the full charge threshold, the centralized energy management server generates a consumption scheduling instruction. The consumption scheduling instruction is used to instruct the activation of adjustable loads in the data center to increase power consumption. When the real-time net power difference is negative and the state of charge data of the energy storage battery array is greater than the discharge threshold, the centralized energy management server generates a discharge scheduling instruction, which includes a discharge power value that satisfies the power gap. When the real-time power net difference is negative, but the state of charge data of the energy storage battery array is less than or equal to the discharge threshold, the centralized energy management server generates a load reduction scheduling instruction, which is used to instruct the non-critical loads in the data center to be powered down in stages.

6. A wind power station data center all-DC power supply system according to claim 5, characterized in that, The system also includes a tiered protection mechanism between the high-voltage DC bus and the data center load: A DC frame circuit breaker is deployed at the main incoming line of the high-voltage DC bus. The DC frame circuit breaker is used to quickly disconnect the main power supply when a serious short-circuit fault occurs on the bus. On the downstream branch circuit of each equipotential power supply access point, a DC miniature circuit breaker is deployed to protect the lines and equipment of the branch circuit where the DC miniature circuit breaker is located from damage by overload or short-circuit current. At the DC output terminal of each high-voltage DC to low-voltage DC converter, an output overvoltage protection circuit and an output overcurrent protection circuit are provided. The output overvoltage protection circuit and the output overcurrent protection circuit are used to protect the low-voltage DC load equipment in the downstream stage. Establish a tiered coordination logic for protection actions, so that the DC miniature circuit breaker closest to the fault point operates first, and the DC frame circuit breaker acts last as backup protection, to ensure that the scope of the fault impact is minimized.

7. A storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the function of a wind power station data center all-DC power supply system as described in any one of claims 1 to 6.

Images