Multi-unit adaptive adaptive diesel generator variable flow power supply circuit and electronic equipment

Abstract

The application discloses a multi-unit adaptive and adaptive diesel generator variable flow power supply circuit and electronic equipment, which is applied to the technical field of diesel generator power supply. In the circuit, the rectification energy storage circuit is connected to different specifications of generator units, converts alternating current output by the generator units into direct current, and then outputs stable direct current to the inverter filter circuit through the energy storage and voltage stabilization functions. The inverter filter circuit inverts the stable direct current into power frequency three-phase alternating current, filters out harmonics, and then provides power frequency three-phase alternating current for the load. The integrated control protection circuit obtains the electric parameter signals output by the generator units and the inverter filter circuit in real time, adaptively identifies the types of the generator units based on the electric parameter signals output by the generator units, and outputs corresponding control logic, so as to control and regulate the rectification energy storage circuit to adapt to different units. The electric parameter signals output by the inverter filter circuit are used to monitor the load operation and the circuit abnormality, and trigger the protection action. As can be seen, the circuit has strong adaptability and its output can meet the power demand.

Description

Technical Field

[0001] This application relates to the field of diesel generator power supply technology, and in particular to a multi-unit adaptive diesel generator converter power supply circuit and electronic equipment. Background Technology

[0002] Currently, traditional diesel generator power supply systems typically employ AC / DC converter control schemes, mostly using a classic three-stage converter topology architecture consisting of pulse width modulation (PWM) controllable rectification, DC bus energy storage buffer, and three-phase full-bridge inverter output. This technical approach first uses a PWM rectifier unit to rectify and stabilize the industrial frequency AC power output from the diesel generator into a constant DC voltage. The DC-side energy storage module then buffers power fluctuations and stores energy for a short period. Finally, the inverter unit converts the DC power into AC power that conforms to the industrial frequency standard to supply power to downstream loads or grid connection ports.

[0003] However, in practical engineering applications and adaptation to various scenarios, the aforementioned traditional technical solutions exhibit significant technical shortcomings and application limitations. Specific defects are as follows: First, poor adaptability. Existing solutions are only designed for standardized diesel generators with a frequency of 50Hz and a voltage of 380V, and cannot adapt to other types of generator sets with different power levels and non-standard voltage systems. Second, poor power quality. Under extreme conditions such as sudden changes in downstream load or fluctuations in external grid voltage / frequency, traditional converter architectures cannot provide effective circulating current protection, significantly increasing the risk of equipment failure, downtime, and damage. Consequently, the system's power supply stability and operational reliability cannot meet high-standard power requirements.

[0004] In view of the above-mentioned technologies, finding a multi-unit adaptive diesel generator converter power supply circuit is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a multi-unit adaptive diesel generator converter power supply circuit and electronic equipment. This can solve the problems of poor adaptability and poor power quality in existing technologies.

[0006] To solve the above-mentioned technical problems, this application provides a multi-unit adaptive diesel generator converter power supply circuit, including: a rectifier energy storage circuit, an inverter filter circuit, and an integrated control and protection circuit; The input terminal of the rectifier energy storage circuit is connected to the generator set, and the output terminal of the rectifier energy storage circuit is connected to the input terminal of the inverter filter circuit. It is used to convert, store, and stabilize the AC power output by the generator set to obtain stable DC power and output it to the inverter filter circuit. The output of the inverter filter circuit is connected to the load to invert stable DC power into power frequency three-phase AC power and filter out harmonics in the power frequency three-phase AC power so as to output standard power frequency three-phase AC power to the load. The two signal acquisition terminals of the integrated control and protection circuit are connected to the output terminals of the generator set and the inverter filter circuit, respectively. The two control terminals of the integrated control and protection circuit are connected to the control terminals of the rectifier energy storage circuit and the inverter filter circuit, respectively. They are used to acquire the first electrical parameter signal of the generator set and the second electrical parameter signal output by the inverter filter circuit, so as to adaptively identify the type of the generator set according to the first electrical parameter signal and synchronously output the corresponding control logic. They also monitor the operating status of the load and the abnormal operating conditions of the current circuit according to the multi-dimensional parameters in the second electrical parameter signal and trigger the corresponding protection action.

[0007] Preferably, the rectifier-energy storage circuit includes: a PWM rectifier circuit and an energy storage circuit; The input terminal of the PWM rectifier circuit is connected to the generator set as the input terminal of the rectifier energy storage circuit. The first output terminal of the PWM rectifier circuit is connected to the first connection terminal of the energy storage circuit, and the second output terminal of the PWM rectifier circuit is connected to the second connection terminal of the energy storage circuit. The first output terminal and the second output terminal of the PWM rectifier circuit are combined to serve as the output terminal of the rectifier energy storage circuit and are connected to the input terminal of the inverter filter circuit.

[0008] Preferably, the PWM rectifier circuit includes: a first-phase rectifier circuit, a second-phase rectifier circuit, and a third-phase rectifier circuit. The input terminal of the first phase rectifier circuit is connected to the first phase voltage terminal in the generator set. The input terminal of the second-phase rectifier circuit is connected to the second-phase voltage terminal in the generator set; The input terminal of the third-phase rectifier circuit is connected to the third-phase voltage terminal in the generator set; The first connection terminal of the first phase rectifier circuit is connected to the first connection terminal of the second phase rectifier circuit and the first connection terminal of the third phase rectifier circuit, and together they are connected to the first connection terminal of the energy storage circuit. The second connection terminal of the first phase rectifier circuit is connected to the second connection terminal of the second phase rectifier circuit and the second connection terminal of the third phase rectifier circuit, and together they are connected to the second connection terminal of the energy storage circuit. The input terminals of the first-phase rectifier circuit, the second-phase rectifier circuit, and the third-phase rectifier circuit are collectively used as the input terminals of the PWM rectifier circuit; the first connection terminals of the first-phase rectifier circuit, the second-phase rectifier circuit, and the third-phase rectifier circuit are collectively used as the first output terminals of the PWM rectifier circuit; and the second connection terminals of the first-phase rectifier circuit, the second-phase rectifier circuit, and the third-phase rectifier circuit are collectively used as the second output terminals of the PWM rectifier circuit.

[0009] Preferably, the inverter filter circuit includes: a DC inverter circuit and an LC filter circuit; In this circuit, the first and second input terminals of the DC inverter circuit are connected together as the input terminals of the inverter filter circuit and the output terminal of the rectifier energy storage circuit. Each output terminal of the DC inverter circuit is connected to each input terminal of the LC filter circuit. The output terminals of the LC filter circuit are collectively connected to the load as the output terminals of the inverter filter circuit.

[0010] Preferably, the DC inverter circuit includes: a first group of inverter circuits, a second group of inverter circuits, a third group of inverter circuits, and a fourth group of inverter circuits; The first connection terminals of the first group of inverter circuits, the first connection terminals of the second group of inverter circuits, the first connection terminals of the third group of inverter circuits, and the first connection terminals of the fourth group of inverter circuits are connected and together serve as the first input terminal of the DC inverter circuit. The second connection terminals of the first group of inverter circuits, the second connection terminals of the second group of inverter circuits, the second connection terminals of the third group of inverter circuits, and the second connection terminals of the fourth group of inverter circuits are connected and together serve as the second input terminal of the DC inverter circuit. The control terminals of the first, second, third, and fourth inverter circuits serve as the output terminals of the DC inverter circuits and are connected to the input terminals of the corresponding LC filter circuits.

[0011] Preferably, the LC filter circuit includes: a first filter circuit, a second filter circuit, a third filter circuit, and a single-inductor filter circuit; The first connection terminal of the first filter circuit, the first connection terminal of the second filter circuit, the first connection terminal of the third filter circuit, and the first connection terminal of the single inductor filter circuit are respectively connected to the corresponding output terminals of the LC filter circuit as input terminals of the LC filter circuit. The second connection terminals of the first filter circuit, the second filter circuit, and the third filter circuit are respectively connected to the corresponding loads as the output terminals of the LC filter circuit. The second connection terminal of the single-inductor filter circuit is connected to the third connection terminal of the first filter circuit, the third connection terminal of the second filter circuit, and the third connection terminal of the third filter circuit, and is connected to the corresponding load connection terminal as an output terminal of the LC filter circuit.

[0012] Preferably, the integrated control and protection circuit includes: a converter control circuit and a main control circuit; Among them, the two signal acquisition terminals of the converter control circuit are respectively connected to the output terminals of the generator set and the inverter filter circuit as the two signal acquisition terminals of the integrated control and protection circuit. The two control terminals of the converter control circuit are respectively connected to the control terminals of the integrated control and protection circuit, the control terminals of the rectifier energy storage circuit, and the control terminals of the inverter filter circuit. The first information exchange and transmission terminal of the converter control circuit is connected to the control terminal of the main control circuit.

[0013] Preferably, it further includes: a human-computer interaction interface; The input terminal of the human-computer interaction interface is connected to the second information exchange and transmission terminal of the converter control circuit.

[0014] Preferably, it further includes: a cooling and heat dissipation circuit; The control terminal of the cooling and heat dissipation circuit is connected to the heat dissipation control terminal of the rectifier energy storage circuit and the heat dissipation control terminal of the inverter filter circuit.

[0015] On the other hand, this application also provides an electronic device, including the above-mentioned multi-unit adaptive diesel generator converter power supply circuit.

[0016] This application provides a multi-unit adaptive diesel-to-converter power supply circuit, in which the generator set, rectifier energy storage circuit, inverter filter circuit, and load are connected sequentially. Simultaneously, an integrated control and protection circuit is also connected to the generator set, rectifier energy storage circuit, inverter filter circuit, and load. In this circuit, the rectifier energy storage circuit connects to generator sets of different specifications, first converting the AC output of the generator set into DC, and then outputting stable DC to the inverter filter circuit through energy storage and voltage stabilization. The inverter filter circuit inverts the stable DC into three-phase AC at power frequency, and then filters out harmonics to provide standard three-phase AC at power frequency to the load. The integrated control and protection circuit acquires the electrical parameter signals output by the generator set and inverter filter circuit in real time through a signal acquisition terminal. Based on the first electrical parameter signal output by the generator set, it can adaptively identify the generator set type and output corresponding control logic, thereby regulating the rectifier energy storage circuit to adapt to different generator sets. Simultaneously, based on the second electrical parameter signal output by the inverter filter circuit, it monitors load operation and circuit abnormalities, triggering protection actions to ensure stable circuit operation. This circuit features a strong adaptability because the integrated control and protection circuit can acquire the first electrical parameter signal of the generator set through the signal acquisition terminal, enabling adaptive identification of the generator set type and synchronous output of the corresponding control logic. Furthermore, the rectifier energy storage circuit in the circuit can stabilize and store the AC power output by the generator set, effectively suppressing fluctuations on the generator side. The inverter filter circuit can filter out harmonics in the three-phase AC power. At the same time, the integrated control and protection circuit can monitor abnormal circuit conditions in real time based on the second electrical parameter signal and implement protective actions, thereby significantly reducing the risk of equipment failure, downtime, and damage, improving the stability and reliability of the circuit power supply, and meeting high-standard power requirements. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This application provides a structural diagram of a multi-unit adaptive diesel generator converter power supply circuit according to an embodiment of the present application; Figure 2 This application provides a circuit diagram of a multi-unit adaptive diesel generator converter power supply circuit. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0020] The core of this application is to provide a multi-unit adaptive diesel generator converter power supply circuit and electronic equipment.

[0021] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This application provides a structural diagram of a multi-unit adaptive diesel generator converter power supply circuit, as shown in the embodiment. Figure 1 As shown, it includes: rectifier energy storage circuit 1, inverter filter circuit 2 and integrated control and protection circuit 3. In addition, it also includes: generator set 4 and load 5.

[0023] The connection relationship of the multi-unit adaptive diesel-electric converter power supply circuit is as follows: the input terminal of the rectifier energy storage circuit 1 is connected to the generator set 4; the output terminal of the rectifier energy storage circuit 1 is connected to the input terminal of the inverter filter circuit 2; the output terminal of the inverter filter circuit 2 is connected to the load 5; the two signal acquisition terminals of the integrated control and protection circuit 3 are respectively connected to the output terminals of the generator set 4 and the inverter filter circuit 2; the two control terminals of the integrated control and protection circuit 3 are respectively connected to the control terminals of the rectifier energy storage circuit 1 and the inverter filter circuit 2.

[0024] In a specific embodiment, the input terminal of the rectifier energy storage circuit 1 is connected to the generator set 4. It is mainly used to receive the AC power output from the generator set 4 and simultaneously complete the AC-to-DC conversion, energy storage, and voltage stabilization. Through its own rectification and energy storage structure, it processes the voltage and frequency fluctuations output by the generator set 4, ultimately outputting stable DC power to the inverter filter circuit 2. The inverter filter circuit 2 receives the stable DC power output from the rectifier energy storage circuit 1 and inverts it into three-phase AC power at the industrial frequency. Simultaneously, it filters out high-order harmonics generated during the inversion process through its own filtering structure, ensuring that the output to the load 5 is standard three-phase AC power at the industrial frequency, thus guaranteeing stable power supply to the load 5. The integrated control and protection circuit 3 collects real-time data from the generator set 4 through two signal acquisition terminals. The first electrical parameter signal output and the second electrical parameter signal output by the inverter filter circuit 2, based on the acquired first electrical parameter signal, can adaptively identify the type, power level and output specifications of the generator set 4, and synchronously output the corresponding control logic to the rectifier energy storage circuit 1 to adjust the operating parameters of the rectifier energy storage circuit 1 to adapt it to the currently connected generator set 4, ensuring stable and efficient AC-DC conversion and energy storage voltage stabilization process; at the same time, based on the multi-dimensional parameters in the acquired second electrical parameter signal, the operating status of the load 4 and the abnormal operating conditions of the entire circuit are monitored in real time. When a fault or abnormality is detected, the corresponding protection action is immediately triggered to achieve comprehensive protection of the circuit, generator set 4 and load 5, ensuring the stable and reliable operation of the entire diesel-powered converter circuit.

[0025] Therefore, the multi-unit adaptive diesel-electric converter power supply circuit provided in this application consists of a generator set, a rectifier energy storage circuit, an inverter filter circuit, and a load connected sequentially. Simultaneously, an integrated control and protection circuit is also connected to the generator set, rectifier energy storage circuit, inverter filter circuit, and load. In this circuit, the rectifier energy storage circuit connects to generator sets of different specifications, first converting the AC output of the generator set into DC, and then outputting stable DC to the inverter filter circuit through energy storage and voltage stabilization. The inverter filter circuit inverts the stable DC into three-phase AC at power frequency, and then filters out harmonics to provide standard three-phase AC at power frequency to the load. The integrated control and protection circuit acquires the electrical parameter signals output by the generator set and the inverter filter circuit in real time through a signal acquisition terminal. Based on the first electrical parameter signal output by the generator set, it can adaptively identify the generator set type and output corresponding control logic, thereby regulating the rectifier energy storage circuit to adapt to different generator sets. Simultaneously, based on the second electrical parameter signal output by the inverter filter circuit, it monitors load operation and circuit abnormalities, triggering protection actions to ensure stable circuit operation. This circuit features a strong adaptability because the integrated control and protection circuit can acquire the first electrical parameter signal of the generator set through the signal acquisition terminal, enabling adaptive identification of the generator set type and synchronous output of the corresponding control logic. Furthermore, the rectifier energy storage circuit in the circuit can stabilize and store the AC power output by the generator set, effectively suppressing fluctuations on the generator side. The inverter filter circuit can filter out harmonics in the three-phase AC power. At the same time, the integrated control and protection circuit can monitor abnormal circuit conditions in real time based on the second electrical parameter signal and implement protective actions, thereby significantly reducing the risk of equipment failure, downtime, and damage, improving the stability and reliability of the circuit power supply, and meeting high-standard power requirements.

[0026] Based on the above embodiments, as a preferred embodiment, such as... Figure 2 As shown, its rectifier and energy storage circuit 1 includes: a PWM rectifier circuit 11 and an energy storage circuit 12.

[0027] The input terminal of the PWM rectifier circuit 11 is connected to the generator set 4 as the input terminal of the rectifier energy storage circuit 1; the first output terminal of the PWM rectifier circuit 11 is connected to the first connection terminal of the energy storage circuit 12, and the second output terminal of the PWM rectifier circuit 11 is connected to the second connection terminal of the energy storage circuit 12; the first output terminal and the second output terminal of the PWM rectifier circuit 11 together serve as the output terminal of the rectifier energy storage circuit 1 and are connected to the input terminal of the inverter filter circuit 2.

[0028] In a specific embodiment, the input terminal of its PWM rectifier circuit 11 is connected to the generator set 4. It can use IGBT (Insulated Gate Bipolar Transistor), MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), or SiC (Silicon Carbide) power devices. It converts AC power to DC power through a closed-loop modulation method (model predictive control, adaptive proportional-integral or proportional-integral algorithm), and has the function of automatically identifying the output voltage and frequency of different types of generators. The input terminal has strong anti-impact capability.

[0029] Its energy storage circuit 12 is connected to the output terminal of the PWM rectifier circuit 11. It can use electrolytic capacitors, supercapacitors or hybrid energy storage structures to store DC power and form a stable DC bus, filter voltage and frequency fluctuations on the generator side, and provide instantaneous power support.

[0030] Furthermore, such as Figure 2 As shown, its PWM rectifier circuit includes 11: a first-phase rectifier circuit (MOSFET Q1 and MOSFET Q2), a second-phase rectifier circuit (MOSFET Q3 and MOSFET Q4) and a third-phase rectifier circuit (MOSFET Q5 and MOSFET Q6), while the energy storage circuit 12 is specifically a capacitor C1.

[0031] Specifically, the input terminals of the first-phase rectifier circuit (MOSFETs Q1 and Q2) are connected to the first-phase voltage terminal of the generator set 4; the input terminals of the second-phase rectifier circuit (MOSFETs Q3 and Q4) are connected to the second-phase voltage terminal of the generator set 4; the input terminals of the third-phase rectifier circuit (MOSFETs Q5 and Q6) are connected to the third-phase voltage terminal of the generator set 4; the first connection terminals of the first-phase rectifier circuit (MOSFETs Q1 and Q2) are connected to the first connection terminals of the second-phase rectifier circuit (MOSFETs Q3 and Q4) and the third-phase rectifier circuit (MOSFETs Q5 and Q6), and are all connected to the first connection terminal of the energy storage circuit 12; the second connection terminals of the first-phase rectifier circuit (MOSFETs Q1 and Q2) are connected to the second connection terminals of the second-phase rectifier circuit (MOSFETs Q3 and Q4) and the third-phase rectifier circuit (MOSFETs Q5 and Q6), and are all connected to the second connection terminal of the energy storage circuit 12.

[0032] In a specific embodiment, the input terminals of the first-phase rectifier circuit (MOSFETs Q1 and Q2) are connected to the first-phase voltage terminal of the generator set 4, the input terminals of the second-phase rectifier circuit (MOSFETs Q3 and Q4) are connected to the second-phase voltage terminal of the generator set 4, and the input terminals of the third-phase rectifier circuit (MOSFETs Q5 and Q6) are connected to the third-phase voltage terminal of the generator set 4, thereby achieving synchronous connection of three-phase AC power; simultaneously, the first-phase rectifier circuit (MOSFETs Q1 and Q2), the second-phase rectifier circuit (MOSFETs Q3 and Q4), and the third-phase rectifier circuit (MOSFETs Q5 and Q6) are connected to the third-phase voltage terminal of the generator set 4, realizing synchronous connection of three-phase AC power; at the same time, the first-phase rectifier circuit (MOSFETs Q1 and Q2), the second-phase rectifier circuit (MOSFETs Q5 and Q6), and the third-phase rectifier circuit (MOSFETs Q1 and Q2) are connected to the first-phase voltage terminal of the generator set 4, thereby realizing synchronous connection of three-phase AC power; After the first connection terminals of the three phase rectifier circuits (Q3 and Q4) and the third phase rectifier circuit (Q5 and Q6) are interconnected, they are all connected to the first connection terminal of the energy storage circuit 12 (capacitor C1). The second connection terminals of the three phase rectifier circuits are also interconnected and are all connected to the second connection terminal of the energy storage circuit 12 (capacitor C1), forming a complete circuit loop. This allows the three-phase AC power output from the generator set 4 to be rectified and converted by the three-phase rectifier circuit and then transmitted to the energy storage circuit 12 (capacitor C1) for energy storage and voltage regulation, providing a stable DC power input for the subsequent inverter filter circuit 2.

[0033] It should be noted that the embodiments provided in this application are only one possible implementation method, but are not limited to this only implementation method. Users can set their own implementation methods according to their needs.

[0034] The three-phase bridge PWM rectifier circuit provided in this application, combined with a single-capacitor energy storage topology, has a simple and compact structure and low hardware cost. The three-phase rectifier branches are synchronously connected to the three-phase voltage of the generator set, which can realize balanced and efficient rectification and conversion of three-phase AC power, effectively improving the AC-DC conversion efficiency. With the energy storage and voltage stabilization effect of the capacitor, it can quickly suppress voltage fluctuations and current glitches on the generator set side, build a stable DC bus voltage, and avoid the voltage distortion on the DC side from affecting the output of the subsequent inverter.

[0035] Based on the above embodiments, as a preferred embodiment, it is as follows: Figure 2 As shown, the inverter filter circuit 2 includes a DC inverter circuit 21 and an LC filter circuit 22.

[0036] The first and second input terminals of the DC inverter circuit 21 are connected together as the input terminals of the inverter filter circuit 2 and the output terminal of the rectifier energy storage circuit 1. Each output terminal of the DC inverter circuit 21 is connected to each input terminal of the LC filter circuit 22. The output terminals of the LC filter circuit 22 are collectively connected to the load 5 as the output terminals of the inverter filter circuit 2.

[0037] In a specific embodiment, the input terminal of the DC inverter circuit 21 is connected to the energy storage circuit 12, and a two-level or three-level NPC (Neutral Point Clamped) topology can be adopted to invert DC power into three-phase AC power.

[0038] The input terminal of the LC filter circuit 22 is connected to the DC inverter circuit 21, and the output terminal is connected to the load 5. It adopts LC (Inductor-Capacitor Filter Topology), LCL (Inductor-Capacitor-Inductor Filter Topology), or RC (Resistor-Capacitor Filter Topology) filter topology to filter out harmonics and output three-phase four-wire power that meets national standards.

[0039] Furthermore, such as Figure 2 As shown, the DC inverter circuit 21 includes: a first set of inverter circuits (MOSFETs Q11 and Q12), a second set of inverter circuits (MOSFETs Q13 and Q14), a third set of inverter circuits (MOSFETs Q15 and Q16), and a fourth set of inverter circuits (MOSFETs Q17 and Q18); the LC filter circuit 22 includes: a first filter circuit (inductor L1 and capacitor C11), a second filter circuit (inductor L2 and capacitor C12), a third filter circuit (inductor L3 and capacitor C13), and a single inductor filter circuit (inductor L4).

[0040] The specific connection relationship is as follows: the first connection terminals of the first group of inverter circuits (MOSFETs Q11 and Q12), the first connection terminals of the second group of inverter circuits (MOSFETs Q13 and Q14), the first connection terminals of the third group of inverter circuits (MOSFETs Q15 and Q16), and the first connection terminals of the fourth group of inverter circuits (MOSFETs Q17 and Q18) are connected and together serve as the first input terminal of the DC inverter circuit 21; the second connection terminals of the first group of inverter circuits (MOSFETs Q11 and Q12), the second group of inverter circuits (MOSFETs Q13 and Q14), and the fourth group of inverter circuits (MOSFETs Q15 and Q16) are connected and together serve as the first input terminal of the DC inverter circuit 21. The second connection terminal of the first inverter circuit (MOSFET Q14), the second connection terminal of the third inverter circuit (MOSFETs Q15 and Q16), and the second connection terminal of the fourth inverter circuit (MOSFETs Q17 and Q18) are connected together and serve as the second input terminal of the DC inverter circuit 21; the control terminals of the first inverter circuit (MOSFETs Q11 and Q12), the second inverter circuit (MOSFETs Q13 and Q14), the third inverter circuit (MOSFETs Q15 and Q16), and the fourth inverter circuit (MOSFETs Q17 and Q18) are connected together and serve as the second input terminal of the DC inverter circuit 21. The control terminals of 18) serve as the output terminals of the DC inverter circuit 21 and are connected to the input terminals of the corresponding LC filter circuit 22; the first connection terminals of the first filter circuit (inductor L1 and capacitor C11), the second filter circuit (inductor L2 and capacitor C12), the third filter circuit (inductor L3 and capacitor C13), and the single-inductor filter circuit (inductor L4) serve as the input terminals of the LC filter circuit 22 and are connected to the output terminals of the corresponding DC inverter circuit 21; the second .... The second connection terminal of the filter circuit (inductor L2 and capacitor C12) and the second connection terminal of the third filter circuit (inductor L3 and capacitor C13) are respectively connected to the corresponding load 5 as the output terminals of the LC filter circuit 22. The second connection terminal of the single inductor filter circuit (inductor L4) is connected to the third connection terminal of the first filter circuit (inductor L1 and capacitor C11), the third connection terminal of the second filter circuit (inductor L2 and capacitor C12), and the third connection terminal of the third filter circuit (inductor L3 and capacitor C13), and is connected to the corresponding load 5 as one output terminal of the LC filter circuit 22.

[0041] In a specific embodiment, the first connection terminals of the four sets of inverter circuits are interconnected and serve as the first input terminal of the DC inverter circuit 21. The second connection terminals are interconnected and serve as the second input terminal of the DC inverter circuit 21, realizing the synchronous access and inversion conversion of DC power. The control terminals of the four sets of inverter circuits serve as the output terminals of the DC inverter circuit 21, and are connected to the input terminals of the LC filter circuit. The LC filter circuit consists of three sets of LC filter circuits and one set of single-inductor filter circuits. The first connection terminals of the three sets of LC filter circuits and the single-inductor filter circuit are connected to the output terminals of the DC inverter circuit 21, respectively. The second connection terminals of the three sets of LC filter circuits are directly connected to the load 5. The second connection terminal of the single-inductor filter circuit is connected to the third connection terminal of the three sets of LC filter circuits and then connected to the load 5, forming a complete inverter-filter-power supply loop, realizing the inversion conversion of DC power to power frequency AC power and harmonic filtering, and providing stable power supply to the load.

[0042] It should be noted that the embodiments provided in this application are only one possible implementation method, but are not limited to this only implementation method. Users can set their own implementation methods according to their needs.

[0043] This connection structure improves inverter efficiency and output power balance by using four sets of inverter circuits to work together. Combined with the design of three sets of LC filter circuits and a single inductor filter circuit, it can efficiently filter out high-order harmonics generated during the inverter process through the LC filter structure, optimize the output power quality, and further suppress current fluctuations and enhance the circuit's anti-interference capability with the help of the single inductor filter circuit.

[0044] Based on the above embodiments, as a preferred embodiment, the integrated control and protection circuit 3 includes: a converter control circuit 31 and a main control circuit 32.

[0045] The two signal acquisition terminals of its converter control circuit 31 are respectively connected to the output terminals of the generator set 4 and the inverter filter circuit 2 as the two signal acquisition terminals of the integrated control and protection circuit 3. The two control terminals of the converter control circuit 31 are respectively connected to the control terminals of the integrated control and protection circuit 3, the control terminals of the rectifier energy storage circuit 1 and the control terminals of the inverter filter circuit 2. The first information exchange and transmission terminal of the converter control circuit 31 is connected to the control terminal of the main control circuit 32.

[0046] In a specific embodiment, the integrated control and protection circuit 3 is connected to the control terminals of the rectifier energy storage circuit 1 and the inverter filter circuit 2, respectively. It collects voltage, current, and temperature signals via sampling signal lines and sends PWM drive signals via control signal lines. Simultaneously, it incorporates a built-in circulating current detection and protection mechanism, monitoring circulating current surges in real time by collecting the inverter output current, with a fault response time ≤5μs; and a built-in multi-protection system (overcurrent, overvoltage, overtemperature, insulation monitoring, and switching device protection). Furthermore, it includes a built-in reverse power protection function, which monitors output power in real time. When the reverse power exceeds a set threshold, it triggers protection actions, including sending a power limiting command to an external power source, disconnecting the grid-connected contactor, or stopping the generator set operation.

[0047] In the hardware configuration of the integrated control and protection circuit 3, dual PWM control channels are configured for automatic switching between master and backup, and support RS485, Modbus, CANopen or EtherCAT communication protocols.

[0048] In addition, the multi-unit adaptive diesel generator converter circuit also includes: human-machine interface 6, cooling circuit 7, and switch K.

[0049] The input terminal of its human-machine interface 6 is connected to the second information exchange and transmission terminal of the converter control circuit 31, and is used to display relevant information; The control terminal of the cooling and heat dissipation circuit 7 is connected to the heat dissipation control terminal of the rectifier energy storage circuit 1 and the heat dissipation control terminal of the inverter filter circuit 2, and uses air cooling, liquid cooling or hybrid heat dissipation methods to dissipate heat for the system. Switch K is used to connect load 5 and three sets of LC filter circuits and a single inductor filter circuit.

[0050] In summary, the working process of the multi-unit adaptive diesel generator converter power supply circuit provided in this application is as follows: Start-up: The main control circuit 32 starts the cooling circuit 7 and sends a start command to the generator set 4, and the generator set starts to run.

[0051] Rectification: When the generator set 4 reaches 50% of the rated speed, the converter control circuit 31 controls the PWM rectifier circuit 11 to work, and uses the model predictive control algorithm to rectify the AC power output by the generator into 650V DC power. The energy storage circuit 12 is used to stabilize the bus voltage.

[0052] Inverter: After the bus voltage stabilizes, the converter control circuit 31 controls the DC inverter circuit 21 to work, converting DC power into three-phase AC power. After the LC filter circuit 22 filters out harmonics, it outputs 380V / 50Hz sinusoidal power.

[0053] Grid connection / Off-grid: According to user instructions, the main control circuit 32 controls the DC inverter circuit 21 through the converter control circuit 31 to achieve synchronous grid connection with the grid, or switch to off-grid independent operation mode.

[0054] Its protection mechanism is as follows: Circulating current protection: The converter control circuit 31 collects the output current of the DC inverter circuit 21 in real time. When a circulating current impact is detected, the inverter PWM pulse is blocked within 5μs.

[0055] Overcurrent protection: instantaneous protection (160% of rated current), short-delay protection (120% of rated current), long-delay protection (110% of rated current).

[0056] Overvoltage protection: When the bus voltage exceeds 900V, the rectifier and inverter pulses are blocked.

[0057] Over-temperature protection: The module will operate at a reduced rate when the temperature reaches 85°C and will shut down when the temperature reaches 95°C.

[0058] Reverse power protection: The main control circuit 32 detects the output active power in real time. When it detects that the reverse power exceeds the rated power by 5% and lasts for 2 seconds, it triggers protection actions, including sending a power limit command to the external power source, disconnecting the grid-connected contactor, or stopping the generator set.

[0059] In summary, the multi-unit adaptive diesel generator converter power supply circuit provided in this application has the following advantages: 1. It can be adapted to various synchronous / asynchronous diesel generators with speeds of 1000r / min to 5000r / min. It improves the power density of the generator through adaptive rectification control, and can still output standard three-phase AC power (50Hz / 380V) at 50% of the rated speed.

[0060] 2. It adopts PWM rectification based on model predictive control, which has fast dynamic response and small bus voltage fluctuation.

[0061] 3. Built-in integrated control and protection system with multiple protections including circulating current detection, reverse power protection, overcurrent / overvoltage / overtemperature / insulation protection, and fault response ≤10μs, significantly improving system safety.

[0062] 4. Supports dual-channel PWM control redundancy, automatic switching between master and backup, and high reliability.

[0063] 5. Provides multiple communication protocols such as RS485, Modbus, CANopen, and EtherCAT, which facilitates collaboration with ECU, EMS, and new energy systems to achieve automatic switching between on-grid and off-grid and power sharing among multiple units in parallel.

[0064] 6. Excellent output harmonic performance; the THD of the voltage with resistive-inductive load is ≤3%, which meets the national standard requirements. 7. The output voltage amplitude and frequency are adjustable (range ±10%) to adapt to different load requirements.

[0065] On the other hand, this application also provides an electronic device, including the above-mentioned multi-unit adaptive diesel generator converter power supply circuit, and has the same beneficial effects.

[0066] Since the embodiments provided in this application are the same as the embodiments of the multi-unit adaptive diesel generator converter power supply circuit described above, this application will not repeat them here.

[0067] The foregoing provides a detailed description of a multi-unit adaptive diesel generator converter power supply circuit and electronic equipment provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0068] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A multi-unit adaptive fitting diesel generator variable flow power supply circuit, characterized in that, include: Rectifier energy storage circuit, inverter filter circuit and integrated control and protection circuit; The input terminal of the rectifier energy storage circuit is connected to the generator set, and the output terminal of the rectifier energy storage circuit is connected to the input terminal of the inverter filter circuit. It is used to convert, store, and stabilize the AC power output by the generator set to obtain stable DC power and output it to the inverter filter circuit. The output of the inverter filter circuit is connected to the load and is used to invert the stable DC power into power frequency three-phase AC power and filter out the harmonics in the power frequency three-phase AC power so as to output standard power frequency three-phase AC power to the load. The two signal acquisition terminals of the integrated control and protection circuit are respectively connected to the output terminals of the generator set and the inverter filter circuit. The two control terminals of the integrated control and protection circuit are respectively connected to the control terminals of the rectifier energy storage circuit and the inverter filter circuit. They are used to acquire the first electrical parameter signal of the generator set and the second electrical parameter signal output by the inverter filter circuit, so as to adaptively identify the type of the generator set according to the first electrical parameter signal and synchronously output the corresponding control logic, and monitor the operating status of the load and the abnormal operating conditions of the current circuit according to the multi-dimensional parameters in the second electrical parameter signal, and trigger the corresponding protection action.

2. The multi-generator adaptive fitting diesel generator variable flow power supply circuit according to claim 1, characterized in that, The rectifier and energy storage circuit includes: a PWM rectifier circuit and an energy storage circuit; The input terminal of the PWM rectifier circuit is connected to the generator set as the input terminal of the rectifier energy storage circuit. The first output terminal of the PWM rectifier circuit is connected to the first connection terminal of the energy storage circuit, and the second output terminal of the PWM rectifier circuit is connected to the second connection terminal of the energy storage circuit. The first output terminal and the second output terminal of the PWM rectifier circuit are together connected to the input terminal of the rectifier energy storage circuit as the output terminal of the rectifier energy storage circuit.

3. The multi-generator adaptive fitting diesel generator variable flow power supply circuit according to claim 2, characterized in that, The PWM rectifier circuit includes: a first-phase rectifier circuit, a second-phase rectifier circuit, and a third-phase rectifier circuit. The input terminal of the first phase rectifier circuit is connected to the first phase voltage terminal of the generator set. The input terminal of the second phase rectifier circuit is connected to the second phase voltage terminal in the generator set; The input terminal of the third-phase rectifier circuit is connected to the third-phase voltage terminal in the generator set; The first connection terminal of the first phase rectifier circuit is connected to the first connection terminal of the second phase rectifier circuit and the first connection terminal of the third phase rectifier circuit, and together they are connected to the first connection terminal of the energy storage circuit. The second connection terminal of the first phase rectifier circuit is connected to the second connection terminal of the second phase rectifier circuit and the second connection terminal of the third phase rectifier circuit, and together they are connected to the second connection terminal of the energy storage circuit. The input terminals of the first-phase rectifier circuit, the second-phase rectifier circuit, and the third-phase rectifier circuit are collectively used as the input terminals of the PWM rectifier circuit; the first connection terminals of the first-phase rectifier circuit, the second-phase rectifier circuit, and the third-phase rectifier circuit are collectively used as the first output terminals of the PWM rectifier circuit; and the second connection terminals of the first-phase rectifier circuit, the second-phase rectifier circuit, and the third-phase rectifier circuit are collectively used as the second output terminals of the PWM rectifier circuit.

4. The multi-pack adaptive fitting diesel generator variable flow power supply circuit according to claim 1, characterized in that, The inverter filter circuit includes: a DC inverter circuit and an LC filter circuit; The first and second input terminals of the DC inverter circuit are connected together as the input terminals of the inverter filter circuit and the output terminal of the rectifier energy storage circuit. Each output terminal of the DC inverter circuit is connected to each input terminal of the LC filter circuit. The output terminals of the LC filter circuit are collectively connected to the load as the output terminals of the inverter filter circuit.

5. The multi-generator adaptive fitting diesel generator variable flow power supply circuit of claim 4, wherein, The DC inverter circuit includes: a first group of inverter circuits, a second group of inverter circuits, a third group of inverter circuits, and a fourth group of inverter circuits; The first connection terminal of the first group of inverter circuits, the first connection terminal of the second group of inverter circuits, the first connection terminal of the third group of inverter circuits, and the first connection terminal of the fourth group of inverter circuits are connected and together serve as the first input terminal of the DC inverter circuit. The second connection terminals of the first group of inverter circuits, the second group of inverter circuits, the third group of inverter circuits, and the fourth group of inverter circuits are connected and together serve as the second input terminal of the DC inverter circuit. The control terminals of the first group of inverter circuits, the second group of inverter circuits, the third group of inverter circuits, and the fourth group of inverter circuits are respectively used as the output terminals of the DC inverter circuits and connected to the corresponding input terminals of the LC filter circuits.

6. The multi-unit adaptive diesel generator converter power supply circuit according to claim 5, characterized in that, The LC filter circuit includes: a first filter circuit, a second filter circuit, a third filter circuit, and a single-inductor filter circuit; Wherein, the first connection terminal of the first filter circuit, the first connection terminal of the second filter circuit, the first connection terminal of the third filter circuit and the first connection terminal of the single inductor filter circuit are respectively connected to the corresponding output terminals of the DC inverter circuit as each input terminal of the LC filter circuit. The second connection terminal of the first filter circuit, the second connection terminal of the second filter circuit, and the second connection terminal of the third filter circuit are respectively connected to the corresponding load as the output terminals of the LC filter circuit. The second connection terminal of the single-inductor filter circuit is connected to the third connection terminal of the first filter circuit, the third connection terminal of the second filter circuit, and the third connection terminal of the third filter circuit, and is connected as an output terminal of the LC filter circuit to the connection terminal of the corresponding load.

7. The multi-unit adaptive diesel generator converter power supply circuit according to claim 1, characterized in that, The integrated control and protection circuit includes: a converter control circuit and a main control circuit; The two signal acquisition terminals of the converter control circuit are respectively connected to the output terminals of the generator set and the inverter filter circuit as the two signal acquisition terminals of the integrated control and protection circuit. The two control terminals of the converter control circuit are respectively connected to the control terminals of the integrated control and protection circuit, the control terminals of the rectifier energy storage circuit, and the control terminals of the inverter filter circuit. The first information exchange and transmission terminal of the converter control circuit is connected to the control terminal of the main control circuit.

8. The multi-pack self-adapting adapted diesel generator variable flow power supply circuit according to claim 7, characterized in that, Also includes: Human-computer interaction interface; The input terminal of the human-computer interaction interface is connected to the second information exchange and transmission terminal of the converter control circuit.

9. The multi-pack self-adapting adapted diesel generator variable flow power supply circuit of claim 1, wherein, Also includes: Cooling and heat dissipation circuitry; The control terminal of the cooling and heat dissipation circuit is connected to the heat dissipation control terminal of the rectifier energy storage circuit and the heat dissipation control terminal of the inverter filter circuit.

10. An electronic device, comprising: Includes the multi-unit adaptive diesel generator converter power supply circuit as described in any one of claims 1-9.

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