Software configurable power supply and distribution system

Abstract

The invention relates to a software-configurable power supply and distribution system, belongs to the technical field of power supply and distribution systems, and solves the problems of insufficient expansibility and flexibility of a power supply and distribution system in the prior art. The system comprises an upper computer, power supply and distribution equipment and a power supply and distribution gateway, wherein the power supply and distribution equipment comprises alternating-current power supply and distribution equipment and direct-current power supply and distribution equipment; the alternating-current power supply and distribution equipment outputs alternating-current electric energy to the direct-current power supply and distribution equipment and external alternating-current electric equipment; the direct-current power supply and distribution equipment outputs direct-current electric energy to external direct-current electric equipment; establishing a mapping relation between an internal protocol and an external protocol for the power supply and distribution equipment through the power supply and distribution gateway; the upper computer issues an instruction through the CAN bus, the power supply and distribution gateway receives the instruction of the upper computer, converts the instruction into an internal protocol according to the mapping relation, issues the internal protocol to the configured power supply and distribution equipment, converts feedback data of the power supply and distribution equipment into an external protocol according to the mapping relation, and reports the external protocol to the upper computer. And the power supply and distribution system with flexible configuration is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply and distribution systems, and in particular to a software-configurable power supply and distribution system. Background Art

[0002] The vehicle power supply and distribution system provides power to various vehicles to meet the various power needs of the vehicles. With the continuous development of vehicle-mounted equipment, more and more diverse requirements are put forward for power supply and distribution, such as the reliability of power supply and distribution, the scalability of power supply and distribution, and the rapid delivery of power supply and distribution.

[0003] Traditional vehicle power supply and distribution systems are generally designed based on power requirements and can only provide a single power supply. They cannot be expanded and cannot meet the power supply requirements of different vehicle models and different vehicle equipment.

[0004] When new demands need to be met, the system framework usually needs to be redeveloped and adjusted to support the power supply and distribution needs of new equipment. It cannot be met through flexible configuration in the form of arbitrary splicing and combination, resulting in low development efficiency. Summary of the invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide a software-configurable power supply and distribution system to solve the problem of insufficient scalability and flexibility of the existing power supply and distribution system.

[0006] An embodiment of the present invention provides a software-configurable power supply and distribution system, comprising: a host computer, power supply and distribution equipment and a power supply and distribution gateway, the power supply and distribution equipment comprising: AC power supply and distribution equipment and DC power supply and distribution equipment; the AC power supply and distribution equipment outputs AC power to the DC power supply and distribution equipment and external AC power users; the DC power supply and distribution equipment outputs DC power to external DC power users; a mapping relationship between an internal protocol and an external protocol is established for the power supply and distribution equipment through the power supply and distribution gateway; the host computer sends instructions through a CAN bus, and the power supply and distribution gateway receives the host computer instructions and converts them into an internal protocol according to the mapping relationship and sends them to the power supply and distribution equipment, and converts the feedback data of the power supply and distribution equipment into an external protocol according to the mapping relationship and reports them to the host computer.

[0007] Based on the further improvement of the above system, the power supply and distribution equipment is divided into multiple parts according to the number of control boards of the power supply and distribution equipment. The power supply and distribution gateway communicates and interconnects with the power supply and distribution equipment of each part through multiple internal CAN buses according to the internal protocol; a dual redundant design is adopted to communicate and interconnect with the host computer according to the external protocol through two external CAN buses.

[0008] Based on further improvement of the above system, the AC power supply and distribution equipment includes: diesel generator sets, power take-off generator sets and AC distribution combinations; the AC distribution combination utilizes parallel control to distribute the AC power output by any combination of diesel generator sets, power take-off generator sets and city power to DC power supply and distribution equipment and external AC power equipment.

[0009] Based on the further improvement of the above system, the parallel control is to monitor the information of the diesel generator set, the AC power distribution combination and the control board of the power conversion combination in the power take-off generator set through the diesel generator set, the parallel controller and the power take-off generator set, and adjust the voltage and frequency of the diesel generator set and the power take-off generator set respectively based on the voltage and frequency of the power take-off generator set. When the parallel conditions are met, the diesel generator set, the AC power and the driving power take-off generator combination gate are controlled to realize parallel control.

[0010] Based on further improvements of the above system, the DC power supply and distribution equipment includes: a rectifier power supply combination, a high-voltage battery combination, a high-voltage distribution combination and multiple DC power supply combinations; the rectifier power supply combination converts the high-voltage AC power output by the AC distribution combination into a first high-voltage DC power, and transmits it to the high-voltage distribution combination together with the second high-voltage DC power output by the high-voltage battery combination; the high-voltage distribution combination connects the first high-voltage DC power and the second high-voltage DC power in parallel and distributes them to multiple DC power supply combinations.

[0011] Based on further improvements of the above system, multiple DC power supply combinations include: 3 first DC power supply combinations, 1 second DC power supply combination, and 1 third DC power supply combination; wherein the first DC power supply combination converts the input high-voltage DC power into rated 28V DC power, and outputs it as 3 28V parallel outputs; the second DC power supply combination converts the input high-voltage DC power into rated 90V DC adjustable voltage power, and outputs it as 2 90V independent outputs; the third DC power supply combination converts the input high-voltage DC power into rated 28V DC power, and outputs it as 3 28V independent outputs.

[0012] Based on further improvement of the above system, the DC power supply and distribution equipment also includes multiple low-voltage DC distribution combinations; the outputs of the two first DC power supply combinations are connected in parallel as a DC bus and transmitted to multiple low-voltage DC distribution combinations, which are distributed to each DC power-consuming equipment by the multiple low-voltage DC distribution combinations.

[0013] Based on the further improvement of the above system, the high-voltage power distribution combination includes a power supply and distribution gateway, an interface board, a power board, a current sampling board, a contactor and a display screen; the input of the high-voltage power distribution combination is connected to the output of the rectifier power supply combination and the high-voltage battery combination, the power supply and distribution gateway receives the instructions sent by the host computer, controls the interface board to drive the contactor, and realizes the load power distribution function; the current sampling board collects the current passing through the contactor, converts the power signal into a voltage signal and transmits it to the power supply and distribution gateway, and the power supply and distribution gateway processes the data and displays the result on the display screen.

[0014] Based on the further improvement of the above system, the rectifier power supply combination includes a three-phase AC filter, an AC contactor, a slow-start resistor, an LC filter circuit, a three-phase rectifier bridge, a boost module and a power board; wherein the AC power output by the AC distribution combination enters the rectifier power supply combination through the three-phase AC filter, and is converted into 540V fluctuating high-voltage DC power through the slow-start resistor through the three-phase rectifier bridge; the 540V fluctuating high-voltage DC power is converted into 540V smooth high-voltage DC power through the LC filter circuit, and the 540V smooth high-voltage DC power is converted into 600V high-voltage DC power through the boost module and output to the high-voltage DC bus through the high-voltage fuse; the power board provides 28V low-voltage DC power to power the coil of the AC contactor, which is used to cut off the slow-start resistor and complete the input slow-start process.

[0015] Based on further improvements of the above system, the power take-off generator set includes a power take-off generator and a power conversion combination; the power take-off generator is used to convert the input mechanical energy into electrical energy and input it into the power conversion combination; the power conversion combination is used to control the excitation current of the power take-off generator so that it outputs a constant DC voltage within the full speed range, and inverts the constant DC voltage into AC power that meets the performance requirements.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] 1. Through the configuration of the parameters of each device and the management of each device by the power supply and distribution gateway, it is possible to flexibly configure AC power supply, high-voltage DC power supply, low-voltage DC power supply, AC distribution and low-voltage DC distribution according to vehicle needs, and freely match power supply combinations, output power and output channels; the same DC power supply combination and low-voltage DC distribution combination are distinguished by address identification through the address bits on the blind plug, thereby ensuring that the combination can be interchanged. After the combination fails, the spare parts do not need to be configured with addresses, and are plug-and-play, achieving true standardized product design.

[0018] 2. By configuring the mapping relationship between internal and external protocols in the power supply and distribution gateway, the power supply and distribution gateway can communicate and interconnect with the subordinate devices through the CAN internal communication protocol, and the working data, working status and fault data of each subordinate device can be displayed in real time through the display screen, and the working data, working status and fault data of each subordinate device can be reported to the host computer to realize remote control and status monitoring; the CAN communication between the power supply and distribution gateway and the host computer adopts a dual redundant design, which greatly improves the reliability of the power supply and distribution system.

[0019] 3. The diesel generator set, driving power take-off generator set and 380V AC input of the mains in the power supply and distribution system can be output in parallel or separately, which improves the stability and reliability of the AC bus; the DC bus is connected in parallel by 2 DC power supplies with a total of 6 output ports, which greatly improves the stability and reliability of the DC bus; the high-voltage battery and rectifier power supply are combined for parallel output, which greatly improves the stability and reliability of the high-voltage DC bus.

[0020] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0022] Figure 1 A block diagram of a software-configurable power supply and distribution system in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the configuration functions of the power supply and distribution gateway in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a power supply and distribution process between power supply and distribution equipment in an embodiment of the present invention;

[0025] Figure 4 It is a block diagram of the composition of a diesel generator set in an embodiment of the present invention;

[0026] Figure 5 It is a block diagram of the composition of the power taking generator set in an embodiment of the present invention;

[0027] Figure 6 A functional schematic diagram of an AC power distribution assembly in an embodiment of the present invention;

[0028] Figure 7It is a block diagram of the high voltage power distribution combination in an embodiment of the present invention;

[0029] Figure 8 4 is a block diagram of a first DC power supply combination in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] A specific embodiment of the present invention discloses a software configurable power supply and distribution system, such as Figure 1 As shown, the system includes: a host computer, power supply and distribution equipment and a power supply and distribution gateway; the power supply and distribution equipment includes: AC power supply and distribution equipment and DC power supply and distribution equipment; the AC power supply and distribution equipment outputs AC power to the DC power supply and distribution equipment and external AC power users; the DC power supply and distribution equipment outputs DC power to external DC power users; a mapping relationship between an internal protocol and an external protocol is established for the power supply and distribution equipment through the power supply and distribution gateway; the host computer sends instructions through the CAN bus, and the power supply and distribution gateway receives the host computer instructions and converts them into an internal protocol according to the mapping relationship and sends them to the power supply and distribution equipment, and converts the feedback data of the power supply and distribution equipment into an external protocol according to the mapping relationship and reports them to the host computer.

[0032] Furthermore, the AC power supply and distribution equipment in this embodiment includes: a diesel generator set, a power take-off generator set and an AC distribution combination; the DC power supply and distribution equipment includes: a rectifier power supply combination, a high-voltage battery combination, a high-voltage distribution combination, multiple DC power supply combinations and multiple low-voltage DC distribution combinations.

[0033] It should be noted that in this embodiment, the power supply and distribution gateway is a control board, including a chip and a memory, and illustratively, is composed of a DSP28335 chip and an EEPROM memory. The power supply and distribution gateway has a configuration function, the software corresponding to which is stored in the FLASH memory in the chip, and the configuration data is stored in the EEPROM memory.

[0034] Specifically, the configuration function of the power supply and distribution gateway is used to provide combination-level configuration and system-level configuration for the power supply and distribution system, which greatly improves the flexibility and adaptability of the power supply and distribution system.

[0035] Specifically, the combination-level configuration is used to configure the power supply and distribution equipment that can be remotely controlled by the host computer, including the power supply and distribution equipment attributes, the combination of the power supply end and the distribution end.

[0036] Exemplarily, the properties configured for the DC power supply combination and the low-voltage DC distribution combination include: overvoltage (overcurrent, overtemperature) protection enable, overvoltage (overcurrent, overtemperature) protection value, how long the overvoltage (overcurrent, overtemperature) protection lasts, and overvoltage (overcurrent, overtemperature) protection action (whether to alarm, whether to shut down); the properties configured for the diesel generator set, AC distribution combination and power take-off generator set include: voltage overvoltage protection value, undervoltage protection value, overfrequency protection value, underfrequency protection value, start delay, start time limit, start interval, cooling shutdown delay, etc.

[0037] The combination of AC power supply end includes: any combination of diesel generator set, driving power take-off generator set and city power; the combination of high-voltage DC power supply end includes: any combination of high-voltage battery combination and rectifier power supply combination; the combination of low-voltage DC power supply end includes: any combination of multiple DC power supply combinations; the combination of AC distribution end includes: any combination of multiple output channels of AC distribution combination; the combination of high-voltage DC distribution end includes: any combination of multiple output channels of high-voltage distribution combination; the combination of low-voltage DC distribution end includes: any combination of multiple low-voltage DC distribution combinations, and any combination of multiple output channels. For any combination of the same devices mentioned above, the address bits on the blind plug are used for address identification and distinction, thereby ensuring that the devices in the entire combination can be interchanged. After the entire combination fails, other devices can be selected without address configuration, and plug-and-play is achieved, achieving true standardized product design.

[0038] Specifically, the system-level configuration is used to configure the CAN internal communication protocol and the CAN external communication protocol, as well as the mapping relationship between the internal and external protocols. When the user requires changes to the external protocol, ensure that the internal protocol does not change.

[0039] like Figure 2 As shown in the figure, the CAN internal communication protocol is the communication protocol between the power supply and distribution gateway and the power supply and distribution equipment. Each control board of each power supply and distribution equipment is a communication node. The CAN external communication protocol is the communication protocol between the power supply and distribution gateway and the host computer. The combination of power supply and distribution equipment is an abstract communication node.

[0040] A mapping relationship between the internal protocol and the external protocol is established for the configured power supply and distribution equipment, that is, a mapping relationship table is formed to record the valid information in the CAN internal communication protocol and the information of the CAN external communication protocol. For example, there are 3 control boards in the first DC power supply combination and 2 control boards in the second DC power supply combination. For the internal communication protocol, the control board addresses are 0x50, 0x51, 0x52, 0x53, and 0x54, respectively, as a communication node. For the external protocol, the addresses of the two DC power supply combinations are 0xD0 and 0xD1, respectively. The configured mapping relationship includes: the address of the combination, and the address of the control board contained in the combination.

[0041] Furthermore, considering that there are relatively many power supply and distribution equipment in this embodiment, in order to reduce communication pressure, the power supply and distribution equipment is divided into multiple parts according to the number of control boards of the power supply and distribution equipment, and the power supply and distribution gateway communicates and interconnects with the power supply and distribution equipment of each part through multiple CAN buses according to the internal protocol.

[0042] Preferably, the power supply and distribution gateway communicates and interconnects with the diesel generator set, the power take-off generator set, the AC distribution combination, the rectifier power supply combination, the high-voltage battery combination, the high-voltage distribution combination and multiple high-voltage DC power supply combinations through the first CAN bus for internal protocol, and communicates and interconnects with multiple low-voltage DC distribution combinations for internal protocol through the second CAN bus.

[0043] In order to improve the reliability of communication between the power supply and distribution gateway and the host computer, and to facilitate the host computer to remotely control and monitor the power supply and distribution system, this embodiment uses the power supply and distribution gateway as the central node, adopts a dual redundant design, and communicates with the host computer through two CAN buses for external protocol interconnection. For example, after receiving the command message from the host computer, the power supply and distribution gateway responds to the command within 20ms. If the host computer does not receive the command response message within 30ms, the command message is resent. The command message can be sent up to 3 times. If the command response message is still not received after 3 times, it switches to another bus to send the same command. The upper limit is 3 times. When the maximum number of times is reached and no response is received, it is considered that the communication link is disconnected.

[0044] Next, if Figure 3 The figure shows the power supply and distribution process between the power supply and distribution devices in the software-configurable power supply and distribution system in detail:

[0045] ① The AC power distribution combination uses parallel control to distribute the AC power output by any combination of diesel generator sets, power take-off generator sets and AC power to the rectifier power supply combination in the DC power supply and distribution equipment and external AC power equipment.

[0046] It should be noted that if Figure 4As shown in the figure, the diesel generator set includes a unit body, a display and control box and an electrical box; the unit body includes a diesel engine and a generator; the display and control box includes a parallel controller, indicator lights, operation buttons, a voltage regulator, an electric controller, a current transformer, a contactor and a circuit breaker; the parallel controller is the core of the display and control box, including a display, a keypad and a control panel, integrating display, control, protection and communication functions; the electrical box connects the display and control box and the unit body, including a voltage regulator, an electric controller, a current transformer, a contactor and a circuit breaker; the voltage regulator is provided by the generator factory as a generator accessory, which is used to control the generator output stable voltage and maintain a certain voltage quality; the electric controller controls the diesel engine speed to always remain at the set point, so that the unit maintains a constant frequency output; the current transformer is used for three-phase current sampling, with an accuracy level of not less than 0.5 and a specification of 200A / 5A; the contactor realizes the external output of AC power; the circuit breaker includes a DC circuit breaker and an AC circuit breaker, which provide protection when a short circuit occurs in the DC circuit or the AC circuit.

[0047] The diesel engine is the power source for the unit. The chassis battery drives the starter motor to start the diesel engine. The diesel engine drives the generator synchronously through the laminated coupling. The electronic controller controls the diesel engine to maintain constant speed. The generator's built-in voltage regulator controls the generator to output AC power with a stable voltage value. The unit is operated and controlled through the display and control box. At the same time, various display and indication devices are set for the unit's operating status. The fault detection and protection part monitors various possible faults of the unit and implements protection actions respectively. The automatic control of the diesel generator set is realized through the parallel controller. At the same time, a manual switch is set on the keypad to provide normal power supply to the electrical equipment when the parallel controller fails.

[0048] The power take-off generator set includes a power take-off generator and a power conversion combination; the power take-off generator, as a medium for electromechanical energy conversion, is used to convert the input mechanical energy into electrical energy and input it into the power conversion combination; the power conversion combination is used to control the excitation current of the power take-off generator so that it outputs a constant DC voltage within the full speed range, and inverts the constant DC voltage into AC power that meets the performance requirements and outputs it to the load; the power conversion combination includes: a cabinet (including a front panel, a rear panel, a fan and a radiator), an inverter side inductor, a generator side inductor, an inverter side power board, a generator side power board, a control board, a signal processing board, a resolver decoding board, a adapter board and a display screen.

[0049] like Figure 5As shown in the figure, the working principle of the power take-off generator set is as follows: after the engine is started, the mechanical energy is transmitted to the rotor of the generator through the transmission mechanism. The control board determines the starting time by detecting the speed of the generator and the switch command. When the speed of the generator reaches the specified power generation speed range and the switch command is in the open state, the start pre-charging function charges the bus capacitor (to about 520V) to store the electric energy required for the pre-excitation and voltage building process of the asynchronous generator. The power board inputs the electric energy on the bus capacitor into the stator winding of the asynchronous generator according to the corresponding control strategy, forms the initial rotating magnetic field required for power generation, completes the voltage building process of the asynchronous generator, and then enters the steady-state power generation state through the closed-loop control of the bus voltage. After steady-state power generation, the power board inverts the constant voltage DC power emitted by the asynchronous generator into 380V50Hz AC output.

[0050] The AC power distribution assembly includes a parallel controller, a contactor, a circuit breaker, a current transformer, an insulation indicator light, an operation button, a bus bar, and input and output connectors.

[0051] like Figure 6 As shown, the AC power distribution combination in this embodiment is used to complete the management of power distribution to AC power-consuming equipment. The 380V AC power output by the diesel generator set and the power-taking generator set, and the 380V AC power of the city power are connected through a bus to form an AC bus, which is distributed to the rectifier power supply combination and external AC power-consuming equipment, thereby realizing hot backup among the three power supply equipment and improving power supply reliability.

[0052] Specifically, parallel control is to monitor the information of diesel generator sets, AC power distribution combination parallel controller and power conversion combination control board in power generator sets, and adjust the voltage and frequency of diesel generator sets and power generator sets respectively based on the voltage and frequency of the mains. When the parallel conditions are met, such as the voltage amplitude and voltage frequency are equal and the phase angle difference is zero, control the diesel generator sets, mains and power generator combination gates to achieve parallel control. When any one or two power supply modes of diesel generator sets, power generator sets or mains fail, the faulty power supply mode can be automatically decoupled, and the non-faulty power supply mode will supply power to the subsequent electrical equipment without affecting the normal operation of the power supply and distribution system.

[0053] It should be noted that the AC power distribution combination has 4 outputs, including: 3 380V and 1 220V. Among them, one of the 3 380V is supplied to the rectifier power supply combination, and the other 2 380V and 1 220V are supplied to AC power equipment.

[0054] ② The rectifier power supply combination converts the high-voltage AC power output by the AC distribution combination into a first high-voltage DC power, and transmits it to the high-voltage distribution combination together with the second high-voltage DC power output by the high-voltage battery combination. The high-voltage distribution combination connects the first high-voltage DC power and the second high-voltage DC power in parallel and distributes them to multiple DC power supply combinations.

[0055] It should be noted that the rectifier power supply combination includes a three-phase AC filter, an AC contactor, a slow-start resistor, an LC filter circuit, a three-phase rectifier bridge, a boost module and a power board. Among them, the 380V AC power output by the AC distribution combination enters the rectifier power supply combination through the three-phase AC filter, and is converted into 540V fluctuating high-voltage DC power through the slow-start resistor through the three-phase rectifier bridge; the 540V fluctuating high-voltage DC power is converted into 540V smooth high-voltage DC power through the LC filter circuit, and the 540V smooth high-voltage DC power is converted into 600V high-voltage DC power through the boost module and output to the high-voltage DC bus through the high-voltage fuse; the power board provides 28V low-voltage DC power to power the coil of the AC contactor, which is used to cut off the slow-start resistor and complete the input slow-start process.

[0056] At the same time, the high-voltage battery assembly is connected to the high-voltage DC bus to achieve uninterrupted power supply to the DC bus, greatly improving the stability and reliability of the high-voltage DC bus. The high-voltage battery assembly includes a battery module unit, a charger and a battery management unit; the battery module unit is composed of multiple battery cells connected in series; the charger replenishes the battery module; the battery management unit manages the battery body, monitors the battery voltage, current, temperature and power in real time, and ensures that the battery module is in good working condition.

[0057] like Figure 7 As shown, the high-voltage power distribution combination includes a power supply and distribution gateway, an interface board, a power board, a current sampling board, a contactor and a display screen; the input of the high-voltage power distribution combination is connected to the output of the rectifier power supply combination and the high-voltage battery combination, and the power supply and distribution gateway receives instructions from the host computer, controls the interface board to drive the contactor, and realizes the load distribution function; the current sampling board collects the current passing through the contactor, converts the power signal into a voltage signal and transmits it to the power supply and distribution gateway, and the power supply and distribution gateway processes the data and displays the result on the display screen. It should be noted that the display screen displays the working data, working status and fault data of the subordinate devices managed by the power supply and distribution gateway; in addition, the power supply and distribution gateway reports the working data, working status and fault data of the subordinate devices to the host computer to realize remote control and status monitoring.

[0058] The current output by the high-voltage battery and the rectifier power supply combination is connected in parallel in the high-voltage distribution combination, and the high-voltage distribution combination distributes the current to multiple DC power supply combinations.

[0059] ③ Multiple DC power supply combinations include: 3 first DC power supply combinations, 1 second DC power supply combination, and 1 third DC power supply combination; the first DC power supply combination converts the input high-voltage DC power into rated 28V DC power, and outputs 3 28V parallel outputs; the second DC power supply combination converts the input high-voltage DC power into rated 90V DC adjustable voltage power (voltage adjustment range is 90-110V), and outputs 2 90V independent outputs; the third DC power supply combination converts the input high-voltage DC power into rated 28V DC power, and outputs 3 28V independent outputs.

[0060] It should be noted that if Figure 8 As shown, the first DC power supply combination includes: an input / output filter, 5 full-brick power modules, 3 control boards, 3 signal processing boards and 1 slow start board; wherein, the full-brick power module adjusts the high-voltage DC with an input range of 400-750V to a low-voltage DC with an output range of 18-40V; the control board completes the output regulation of voltage and the constant current control of output current; the signal processing board has the function of CAN communication, receives the instructions of the power supply and distribution gateway, completes the operations required by the instructions and replies to the power supply and distribution gateway; collects the voltage, current and temperature values ​​of the full-brick power module; monitors the working status of the full-brick power module in real time, determines which working state the full-brick power module is in, including constant voltage, constant current, overvoltage, overcurrent and overtemperature, and gives corresponding instructions; realizes the voltage output setting, current output setting and fan speed regulation function through pulse width modulation signal output; reads and writes EEPROM to complete the protection parameter configuration of the power supply; the function of the slow start board is to make the 600V high voltage rise slowly to limit the starting current that rises rapidly due to the presence of capacitive load in the later stage.

[0061] The second DC power supply combination includes an input / output filter, two 90V power modules and a power board; wherein the 90V power module adjusts the high voltage DC with an input range of 400 to 750V to a low voltage DC with an output range of 90 to 110V.

[0062] The third DC power supply combination is similar to the first DC power supply combination, with the only difference being that the first DC power supply combination has three parallel outputs, while the third DC power supply combination has three independent outputs.

[0063] Preferably, the DC voltage and current of multiple DC power supply combinations are monitored in real time, and overload protection is performed. The monitoring information is reported by the power supply and distribution gateway through the CAN bus, and the power-on and power-off commands issued by the host computer are received through the CAN bus to realize the remote control power-on and power-off function.

[0064] ④ The outputs of the two first DC power supply assemblies are connected in parallel as a DC bus and transmitted to multiple low-voltage DC distribution assemblies, which are distributed to various DC power-consuming devices by the multiple low-voltage DC distribution assemblies.

[0065] Specifically, the outputs of two first DC power supply assemblies are connected in parallel to form a 28V low-voltage DC bus, and each first DC power supply assembly provides a maximum of 6kW of DC power; the low-voltage DC bus supplies power to multiple low-voltage DC power distribution assemblies. For example, there are four low-voltage DC power distribution assemblies, each of which has eight outputs to supply power to 4 to 5 electrical devices.

[0066] The low-voltage power distribution combination distributes the output of the DC bus to each DC power-consuming device, and performs output protection and collects and detects the output status of each power-consuming device. It includes: a microprocessor, an isolated power supply, an isolation interface, a logic circuit, a voltage / current detection circuit, a short-circuit comparison circuit, a drive circuit, and a power branch; among them, the power branch uses a MOSFET power tube as the main switch for the device to turn on and off the DC power; the voltage / current detection circuit conditions the collected current signal by collecting the sampling resistor voltage in series with the MOSFET tube, including amplification and filtering; if the current is greater than the set maximum current, the output level of the short-circuit comparison circuit flips, and the logic circuit controls the drive circuit to quickly shut down the power tube to achieve short-circuit protection; if the current exceeds the set protection value, the device starts the I2t inverse time delay protection, and the device uses software to achieve inverse time overcurrent protection.

[0067] The low-voltage power distribution combination is internally controlled by a microprocessor, and communicates with the power supply and distribution gateway through the second CAN bus to control the power tube on / off, set parameters, read analog quantities (voltage, current, temperature) and BIT discrete quantities (overvoltage, overcurrent, undervoltage, short circuit, etc.). Logical control is achieved through logic circuits. The host computer can obtain the voltage and current values ​​at the output end of the low-voltage power distribution combination collected by the power supply and distribution gateway, as well as the working status of the device itself, including the power branch status, internal fault status, reset command and control command status, and can also set and read the current value of the low-voltage power distribution combination. The low-voltage power distribution combination has a hot-swap function, and its efficiency is not less than 98.5% under rated voltage and rated current conditions.

[0068] Compared with the prior art, the software-configurable power supply and distribution system provided in this embodiment can realize flexible configuration of AC power supply, high-voltage DC power supply, low-voltage DC power supply, AC power distribution and low-voltage DC power distribution according to vehicle needs through configuration of parameters of each device and management of each device by the power supply and distribution gateway, and freely match power supply combination, output power and output channel; the same DC power supply combination and low-voltage DC power distribution combination are distinguished by address identification through the address bit on the blind plug, thereby ensuring that the combination can be interchanged, and the spare parts after the combination failure do not need to be configured with address, plug and play, and achieve true standardized product design. By configuring the mapping relationship between internal and external protocols in the power supply and distribution gateway, the power supply and distribution gateway communicates and interconnects with the subordinate devices through the CAN internal communication protocol, and displays the working data, working status and fault data of each subordinate device in real time through the display screen, and reports the working data, working status and fault data of each subordinate device to the host computer, so as to realize remote control and status monitoring; the CAN communication between the power supply and distribution gateway and the host computer adopts a dual redundant design, which greatly improves the reliability of the power supply and distribution system. The diesel generator set, driving power take-off generator set and 380V AC input of the mains in the power supply and distribution system can be output in parallel or individually, which improves the stability and reliability of the AC bus; the DC bus is connected in parallel by 2 DC power supplies with a total of 6 output ports, which greatly improves the stability and reliability of the DC bus; the high-voltage battery and rectifier power supply are combined for parallel output, which greatly improves the stability and reliability of the high-voltage DC bus.

[0069] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A software configurable power supply and distribution system, characterized in that: include: A host computer, power supply and distribution equipment and a power supply and distribution gateway, wherein the power supply and distribution equipment includes: AC power supply and distribution equipment and DC power supply and distribution equipment; the AC power supply and distribution equipment outputs AC power to the DC power supply and distribution equipment and external AC power users; the DC power supply and distribution equipment outputs DC power to external DC power users; a mapping relationship between an internal protocol and an external protocol is established for the power supply and distribution equipment through the power supply and distribution gateway; the host computer sends instructions through the CAN bus, and the power supply and distribution gateway receives the host computer instructions and converts them into an internal protocol according to the mapping relationship and sends them to the power supply and distribution equipment, and converts the feedback data of the power supply and distribution equipment into an external protocol according to the mapping relationship and reports them to the host computer.

2. The software configurable power supply and distribution system according to claim 1, characterized in that: The power supply and distribution equipment is divided into multiple parts according to the number of control boards of the power supply and distribution equipment. The power supply and distribution gateway communicates and interconnects with the power supply and distribution equipment of each part using internal protocols through multiple internal CAN buses. A dual redundant design is adopted to communicate and interconnect with the host computer using external protocols through two external CAN buses.

3. The software configurable power supply and distribution system according to claim 1, characterized in that: The AC power supply and distribution equipment includes: a diesel generator set, a power-taking generator set and an AC power distribution combination; the AC power distribution combination utilizes parallel control to distribute the AC power output by any combination of the diesel generator set, the power-taking generator set and the city power to the DC power supply and distribution equipment and external AC power equipment.

4. The software configurable power supply and distribution system according to claim 3, characterized in that: The parallel control is to monitor the information of the diesel generator set, the mains and the power-taking generator set through the parallel controller in the diesel generator set, the AC power distribution combination and the control board of the power conversion combination in the power-taking generator set, and adjust the voltage and frequency of the diesel generator set and the power-taking generator set respectively based on the voltage and frequency of the mains. When the parallel conditions are met, the diesel generator set, the mains and the travel power-taking generator combination switches are controlled to achieve parallel control.

5. The software configurable power supply and distribution system according to claim 3, characterized in that: The DC power supply and distribution equipment includes: a rectifier power supply combination, a high-voltage battery combination, a high-voltage distribution combination and multiple DC power supply combinations; the rectifier power supply combination converts the high-voltage AC power output by the AC distribution combination into a first high-voltage DC power, and transmits it to the high-voltage distribution combination together with the second high-voltage DC power output by the high-voltage battery combination; the high-voltage distribution combination connects the first high-voltage DC power and the second high-voltage DC power in parallel and distributes them to multiple DC power supply combinations.

6. The software configurable power supply and distribution system according to claim 5, characterized in that: The multiple DC power supply combinations include: 3 first DC power supply combinations, 1 second DC power supply combination, and 1 third DC power supply combination; wherein the first DC power supply combination converts the input high-voltage DC power into rated 28V DC power, and outputs it as 3 28V parallel outputs; the second DC power supply combination converts the input high-voltage DC power into rated 90V DC adjustable voltage power, and outputs it as 2 90V independent outputs; the third DC power supply combination converts the input high-voltage DC power into rated 28V DC power, and outputs it as 3 28V independent outputs.

7. The software configurable power supply and distribution system according to claim 6, characterized in that: The DC power supply and distribution equipment also includes multiple low-voltage DC power distribution assemblies; the outputs of the two first DC power supply assemblies are connected in parallel as a DC bus and transmitted to the multiple low-voltage DC power distribution assemblies, which are then distributed to each DC power-consuming device.

8. The software configurable power supply and distribution system according to claim 5, characterized in that: The high-voltage power distribution assembly includes a power supply and distribution gateway, an interface board, a power supply board, a current sampling board, a contactor and a display screen; the input of the high-voltage power distribution assembly is connected to the output of the rectifier power supply assembly and the high-voltage battery assembly, and the power supply and distribution gateway receives instructions issued by the host computer, controls the interface board to drive the contactor, and realizes the load power distribution function; The current sampling board collects the current passing through the contactor, converts the power signal into a voltage signal and transmits it to the power supply and distribution gateway. After the power supply and distribution gateway processes the data, the result is displayed on the display screen.

9. The software configurable power supply and distribution system according to claim 5, characterized in that: The rectifier power supply combination includes a three-phase AC filter, an AC contactor, a slow-start resistor, an LC filter circuit, a three-phase rectifier bridge, a boost module and a power supply board; wherein the AC power output by the AC distribution combination enters the rectifier power supply combination through the three-phase AC filter, and is converted into 540V fluctuating high-voltage DC power through the slow-start resistor through the three-phase rectifier bridge; the 540V fluctuating high-voltage DC power is converted into 540V smooth high-voltage DC power through the LC filter circuit, and the 540V smooth high-voltage DC power is converted into 600V high-voltage DC power through the boost module and output to the high-voltage DC bus through the high-voltage fuse; the power supply board provides 28V low-voltage DC power to power the coil of the AC contactor, which is used to cut off the slow-start resistor and complete the input slow-start process.

10. The software configurable power supply and distribution system according to claim 3, characterized in that: The power take-off generator set includes a power take-off generator and a power conversion combination; the power take-off generator is used to convert input mechanical energy into electrical energy and input it into the power conversion combination; the power conversion combination is used to control the excitation current of the power take-off generator so that it outputs a constant DC voltage within the full speed range, and inverts the constant DC voltage into AC power that meets the performance requirements.

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