Laminated power supply high-dynamic control method and system based on model prediction

Abstract

The invention provides a laminated power supply high-dynamic control method and system based on model prediction, and the method comprises the steps: calculating a load change proportionality coefficient dx according to a stable value of a load impedance characteristic before and after the dynamic change of the load based on the load impedance characteristic when the load dynamically changes; and predicting the change rule of the lamination layer number nx and the (nx + 1) th layer trigger time tn + 1x after the load changes through the lamination power supply model, thereby realizing the rapid control of the current in a single half-wave period when the load is dynamically changed. According to the invention, a model prediction method is adopted to directly calculate the lamination layer number nx and the (nx + 1) th layer trigger time tn + 1x after load change, the problem of slow dynamic response caused by the fact that a traditional PI feedback controller adopts a plurality of half-wave periods to calculate error proportion and integral is solved, and rapid control of current can be realized in a single half-wave period.

Description

Technical Field

[0001] The invention belongs to the technical field of current power supply control, and relates to a high-dynamic control method and system of a laminated power supply based on model prediction. Background Art

[0002] The stacked power supply usually uses thyristors as semiconductor switching devices. This technology turns on different levels of thyristor switches according to different output voltage requirements. Compared with the traditional phase-shifted converter, it has significant advantages in grid harmonics, power factor, reliability and cost, and is widely used in the field of oil heating. However, the thyristor switch is a semi-controlled semiconductor device. Its trigger signal can only control the opening of the semiconductor device, while the shutdown depends on the grid voltage, so it can only be controlled once per half cycle. When the load changes, the traditional PI feedback control requires multiple cycles to adjust to a steady state, the dynamic response is poor, and the system may experience long-term overcurrent in the process of reaching a steady state. Therefore, in order to improve the dynamic performance of the stacked power supply, it is urgent to study high-performance control methods to achieve high dynamic control of the system.

[0003] The stacked power supply has multi-stage thyristor control capability. The present invention proposes a high-dynamic control method for this topology, which can improve the control performance of the stacked power supply under dynamic load conditions to prevent significant power fluctuations or overcurrent when the load changes. The proposed method can also be applied to many other fields.

[0004] The structure of the variable load control system of the laminated power supply is as follows: Figure 1 As shown in the figure, it mainly consists of a power supply and distribution system, a laminated power converter, a variable dynamic load and a power controller. As can be seen from the figure, the power supply and distribution system realizes the external voltage input of the laminated power supply through the switch control signal. The system usually realizes 10kV to 3kV through a transformer. The laminated power converter usually adopts a multi-level structure. This topology can achieve accurate voltage output by controlling thyristors at different levels. Its output voltage is usually 0~3kV. The variable dynamic load usually changes the load by switching the load switch according to the load demand.

[0005] Multiple parallel load structure stacked power supply topology such as Figure 2 As shown. The structure includes a primary power supply, a multi-tap transformer, a multi-stage stacked thyristor switch, and multiple variable loads in parallel. Each stage of the stacked power supply consists of a pair of bidirectional thyristors, and the load is a plurality of attribute loads in parallel. By controlling the load switch, the dynamic input and removal of the load is realized. In the figure, k mp is the mth level upper half-wave thyristor, k mn is the mth lower half-wave thyristor, u prepresents the primary voltage source, r p is the internal resistance of the primary voltage source. T r For a multi-tap transformer, the number of turns of the primary coil is N s , the number of turns of the mth secondary coil is N sm ; The load resistance is r lo , the load current is i lo By controlling the m-level upper and lower half-wave thyristors, multi-level control of the output AC voltage or current is achieved. When the load switch is activated, the traditional PI feedback control method is difficult to achieve high dynamic control. Therefore, the disadvantage of the prior art is that the dynamic response is poor, and the system may experience long-term overcurrent in the process of reaching a steady state. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a high-dynamic control method and system for a laminated power supply based on model prediction, thereby improving the control performance of the laminated power supply under dynamic load conditions to prevent significant fluctuations in power supply or overcurrent when the load changes.

[0007] The present invention is achieved through the following technical solutions: A high dynamic control method of a laminated power supply based on model prediction, comprising: The load impedance characteristics are calculated through the collected current sampling values ​​and the power supply output voltage; The output voltage of the stacked power supply is calculated based on the condition of constant output current.

[0008] Based on the load impedance characteristics, when the load changes dynamically, the load change proportional coefficient is calculated by the stable value of the load impedance characteristics before and after the dynamic load change. d x ； Based on load change proportionality factor d x And the output voltage of the stacked power supply, the stacked power supply model is used to predict the number of stacked levels after the load changes n x and n x +1 layer of trigger time t n+1 x The changing law of the load can realize the rapid control of the current within a single half-wave cycle when the load changes dynamically.

[0009] Preferably, the calculation formula of the load impedance characteristic is: ; Where: R x is the load impedance characteristic, u is the power supply output voltage, i is the current sampling value, and k is the number of discrete simulation calculations.

[0010] Preferably, the output voltage of the stacked power supply is related to the opening level n and n +1 layer of trigger time t n+1 The output voltage functions of the two variables are related.

[0011] The calculation formula of the output voltage of the stacked power supply is: ; In the formula, U u is the output voltage of the stacked power supply, w is the power angular frequency, n is the opening level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply.

[0012] Preferably, the load change proportionality coefficient d x The calculation formula is:

[0013] Where: d x is the load change proportionality coefficient, R x a is the stable value before the load changes dynamically, R x b It is the stable value after dynamic load change.

[0014] Preferably, the function formula of the model prediction of the laminated power supply is:

[0015] Where: d x is the load change proportional coefficient, w is the power angular frequency, n is the opening level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply; n x is the number of stacking levels after dynamic load changes and t n+1 xThe nth time after the load changes dynamically x +1 stack trigger time.

[0016] In the above formula, the formula on the left is the product of the current output voltage modulation reference value and the load change proportional coefficient, which predicts and calculates the controller's final voltage modulation reference value in the future. The formula on the right represents the predicted voltage modulation reference value, where n x and t n+1 x along with d x , n and t n+1 Change and change.

[0017] Preferably, the number of stacking levels after load changes is predicted n x and n x +1 layer of trigger time t n+1 x The changing law of n x and t n+1 x along with d x , n and t n+1 The specific formula is:

[0018] Where: d x is the load change proportional coefficient, w is the power angular frequency, n is the opening level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply; n x is the number of stacking levels after dynamic load changes and t n+1 x The nth time after the load changes dynamically x +1 stack trigger time.

[0019] Preferably, the specific process of controlling the current in a single half-wave cycle when the load changes dynamically is: When the load changes the regulated voltage less than the single-layer voltage, the n x +1 layer of trigger time t n+1 x Regulation to achieve closed-loop control of the effective value of the current within half a cycle; When the load changes and the regulated voltage is greater than the single-layer voltage, the number of stacking levels is adjusted simultaneously. n x and n x +1 layer of trigger time t n+1 x , to achieve the regulation of the effective value of current.

[0020] Preferably, the current sampling value and the power supply output voltage are acquired by collecting the voltage and current measuring device of the laminated power supply.

[0021] A high dynamic control system of a laminated power supply based on model prediction, comprising: A load impedance characteristic calculation unit, a proportional-integral controller, a load change proportional coefficient calculation unit, and a model prediction control unit; The load impedance characteristic calculation unit is used to calculate the load impedance characteristic through the collected current sampling value and the power supply output voltage; The proportional-integral controller is used to calculate the output voltage of the stacked power supply according to the constant output current condition; The load change proportionality coefficient calculation unit is used to calculate the load change proportionality coefficient based on the load impedance characteristics when the load changes dynamically by using the stable value of the load impedance characteristics before and after the load changes dynamically. d x ； The model predictive controller unit is based on the load change proportionality coefficient d x And the stack power supply output voltage, used to predict the stack level after the load changes n x and n x +1 layer of trigger time t n+1 x ’s changing law, thereby realizing the control of current within a single half-wave cycle when the load changes dynamically.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a high-dynamic control method and system for laminated power supplies based on model prediction for laminated power supply topology, which can improve the control performance of laminated power supplies under dynamic load conditions to prevent significant power fluctuations or overcurrent when the load changes. By collecting current sampling values ​​and power supply output voltage and calculating load impedance characteristics, this method can more accurately understand the system state and achieve more accurate current control. Based on the load impedance characteristics, when the load changes dynamically, the load change proportional coefficient is calculated by the stable value of the load impedance characteristics before and after the dynamic load change. d x ; By calculating the load impedance characteristics and load change proportional coefficient, it can adapt to different types of load changes. d x And the output voltage of the stacked power supply, the stacked power supply model is used to predict the number of stacked levels after the load changes n x and n x +1 layer of trigger time t n+1 x The method can adapt to the dynamic changes of the load and maintain the stability of the current by adjusting the number of stacking levels and the trigger time; this dynamic adaptability helps to reduce the impact of load changes on the stability of the thyristor of the semi-controlled semiconductor device. The present invention uses a model prediction method to directly calculate the number of stacking levels n after the load changes. x and nth x+1 Layer trigger time t n+1 x , which solves the problem of slow dynamic response caused by the traditional PI feedback controller using multiple half-wave cycles to calculate the error proportion and integral, and can achieve rapid current control within a single half-wave cycle; Furthermore, by precisely controlling the current, it is possible to ensure that the power supply outputs a constant current while minimizing energy waste, which is of great significance in helping to improve the energy efficiency of the system and reduce operating costs.

[0023] Furthermore, traditional control methods often experience overshoot and oscillation when faced with dynamic load changes. However, this method can effectively reduce these adverse factors and improve system stability through model prediction and precise control.

[0024] Furthermore, the high dynamic control method of the present invention can improve the control performance of the stacked power supply under dynamic load conditions to prevent significant power fluctuations or overcurrent when the load changes. The proposed method can also be applied to many other fields.

[0025] Furthermore, when the load change is small,n +1 layer of trigger time t n+1 Adjustment to achieve closed-loop control of the effective value of the current within half a cycle; when the load changes greatly, by adjusting the number of stacking levels at the same time n and n +1 layer of trigger time t n+1 , to achieve the regulation of the effective value of current. This control strategy combines coarse adjustment and fine adjustment, which can cope with both slight changes in load and significant changes in load. Through real-time monitoring and rapid adjustment of control parameters, the system can achieve precise control of the effective value of current, thus meeting the needs of various complex application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a variable load control system of a laminated power supply in the prior art; Figure 2 A schematic diagram of a stacked power supply topology structure with multiple parallel load structures in the prior art; Figure 3 It is a high dynamic control flow chart of the stacked power supply based on model prediction; Figure 4 A system diagram for predicting a high dynamic control process for a stacked power supply model in an embodiment; Figure 5 This is the output voltage characteristic waveform of the stacked power supply. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] Reference [1] proposed an AC voltage regulator based on nonlinear PI control, which successfully solved the contradiction between short regulation time and small overshoot in traditional PI control. Reference [2] designed and studied a segmented fast voltage regulation model, and determined in detail the turns ratio of each winding in the model and the interval time of trigger pulse sending between two thyristors in the mutually exclusive group, thereby improving the dynamic performance of the converter. However, the current research method has not yet conducted an in-depth discussion on the stacked power supply topology. The semiconductor switching device of the stacked power supply generally adopts a semi-controlled semiconductor device thyristor, and the thyristor can be turned on by a trigger signal. The turn-off of the thyristor depends on the reverse of the grid voltage. Therefore, the traditional stacked power supply current closed-loop control can only be adjusted once in each cycle. It has good regulation ability for linear and slowly changing loads, but has poor response effect for dynamic sudden increase or decrease of loads. The present invention proposes a high dynamic control method for this topology, which can improve the control performance of the stacked power supply under dynamic load conditions to prevent the power supply from fluctuating significantly or overcurrent when the load changes. The proposed method can also be applied to many other fields.

[0030] Specifically: A high dynamic control method for stacked power supply based on model prediction, such as Figure 3 As shown, including; The load impedance characteristics are calculated through the collected current sampling values ​​and the power supply output voltage; The output voltage of the stacked power supply is calculated based on the condition of constant output current.

[0031] Based on the load impedance characteristics, when the load changes dynamically, the load change proportional coefficient is calculated by the stable value of the load impedance characteristics before and after the dynamic load change. d x ； Based on load change proportionality factor d x And the output voltage of the stacked power supply, the stacked power supply model is used to predict the number of stacked levels after the load changes n x and n x +1 layer of trigger time t n+1 x The changing law of the load can be realized to realize the rapid control of the current within a single half-wave cycle when the load changes dynamically.

[0032] Preferably, the calculation formula of the load impedance characteristic is: ; Where: R xis the load impedance characteristic, u is the power supply output voltage, i is the current sampling value, and k is the number of discrete simulation calculations.

[0033] Preferably, the stacked power supply output voltage includes an opening level n and n +1 layer of trigger time t n+1 Two variables.

[0034] The stacked power supply adopts a multi-tap transformer and a multi-stage thyristor output topology. Its output voltage can be adjusted to a superposition of two layers of voltage combinations with different trigger angles according to the load characteristics. Figure 5 is the output voltage waveform of the stacked power supply. Figure 5 It can be seen that when the power supply angular frequency is w, the conduction angle of the first and second thyristors is p, and the conduction angle of the third thyristor is t 3 / w. The output voltage amplitudes of the first, second and third power supplies are u 1. 2 times u 1. 3 times u 1. Compared with the traditional single-layer power supply that adjusts the thyristor conduction angle, the output voltage of the stacked power supply has the advantage of smaller harmonics; In order to keep the output current constant, it is usually necessary to dynamically adjust the conduction angle of each stage of the stacked power supply. The effective value of the output voltage of the stacked power supply within half a cycle is usually the superposition of the integral values ​​of the output voltages of the two layers of power supplies. Assuming that the output voltage sinusoidality of each stage of the stacked power supply is good, the output voltage of the stacked power supply is shown in the following formula, including 0~ t n+1 The voltage of the n+1th layer in the time period and t The voltage of the nth layer is added during the 3~p / w time period.

[0035]

[0036] Among them, U u is the output voltage of the stacked power supply. When the power supply angular frequency is w, the conduction angle of the first and second thyristors is p, and the conduction angle of the third thyristor is t 3 / w, the output voltage amplitudes of the first, second and third power supplies are u 1. 2 times u 1. 3 times u 1.

[0037] Simplifying the above formula, the calculation formula for the output voltage of the stacked power supply is: ; In the formula, U u is the output voltage of the stacked power supply, w is the power angular frequency, n is the opening level, tn+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply.

[0038] Preferably, the load change proportionality coefficient d x The calculation formula is:

[0039] Where: d x is the load change proportionality coefficient, R x a is the stable value before the load changes dynamically, R x b It is the stable value after dynamic load change.

[0040] Preferably, the function formula of the model prediction of the laminated power supply is:

[0041] Where: d x is the load change proportional coefficient, w is the power angular frequency, n is the opening level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply; n x is the number of stacking levels after dynamic load changes and t n+1 x The nth time after the load changes dynamically x +1 stack trigger time.

[0042] In the above formula, the formula on the left is the product of the current output voltage modulation reference value and the load change proportional coefficient, which predicts and calculates the controller's final voltage modulation reference value in the future. The formula on the right represents the predicted voltage modulation reference value, where n x and t n+1 x along with d x , n and t n+1 Change and change.

[0043] Preferably, the number of stacking levels after load changes is predicted n x and n x +1 layer of trigger time t n+1 xThe changing law of n x and t n+1 x along with d x , n and t n+1 The specific formula is:

[0044] Where: d x is the load change proportional coefficient, w is the power angular frequency, n is the opening level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply; n x is the number of stacking levels after dynamic load changes and t n+1 x The nth time after the load changes dynamically x +1 stack trigger time.

[0045] Preferably, the specific process of controlling the current in a single half-wave cycle when the load changes dynamically is: When the load changes the regulated voltage less than the single-layer voltage, the n x +1 layer of trigger time t n+1 x Adjustment can realize closed-loop control of the effective value of the current within half a cycle; when the load change regulation voltage is greater than the single-layer voltage, the first n +1 Layer trigger time t n+1 This means that the system will automatically adjust the control parameters (i.e. the trigger time) according to the deviation between the actual current feedback and the set value. t n+1 ), so that the effective current value is as close to the set value as possible. When the load changes and the regulated voltage is greater than the single-layer voltage, the number of stacking levels is adjusted simultaneously. n x and n x +1 layer of trigger time t n+1 x , to achieve the regulation of the effective value of current.

[0046] When the load-dependent regulation voltage is greater than the single-layer voltage, it may not be possible to quickly and accurately control the effective value of the current simply by fine-tuning the trigger time. Therefore, the system needs to adopt a more flexible control strategy, that is, to adjust the number of stacking levels at the same time. n x and n x +1 layer of trigger time t n+1 x .

[0047] The model prediction method can directly calculate the number of stacking levels n after the load changes. x and nth x+1 Layer trigger time t n+1 x , which solves the problem of slow dynamic response caused by the traditional PI feedback controller using multiple half-wave cycles to calculate the error proportion and integral. It can achieve rapid current control in a single half-wave cycle; in the case of large load changes, by adjusting n The current can be roughly adjusted. When the load changes significantly, the system will first quickly adjust the number of stacking levels according to the size and nature of the load. n , in order to achieve preliminary control of the current size. Then, the system will continue to fine-tune the trigger time t n+1 , and further fine-tune the effective value of the current to reach the set value. Adjusting the number of stacking levels and trigger time at the same time requires more complex control algorithms and higher computing power. The system needs to be able to monitor load changes in real time, quickly calculate and adjust control parameters to ensure stable control of the effective value of the current.

[0048] The current sampling value and the power supply output voltage are collected by a voltage and current measuring device of the laminated power supply.

[0049] A high dynamic control system for laminated power supply based on model prediction, such as Figure 4 As shown, including: A load impedance characteristic calculation unit, a proportional-integral controller, a load change proportional coefficient calculation unit, and a model prediction control unit; The load impedance characteristic calculation unit is used to calculate the load impedance characteristic through the collected current sampling value and the power supply output voltage; The proportional-integral controller is used to calculate the output voltage of the stacked power supply according to the constant output current condition; The load change proportionality coefficient calculation unit is used to calculate the load change proportionality coefficient based on the load impedance characteristics when the load changes dynamically by using the stable value of the load impedance characteristics before and after the load changes dynamically. d x ； The model predictive controller unit is based on the load change proportionality coefficient d x And the stack power supply output voltage, used to predict the stack level after the load changes n x and n x +1 layer of trigger time t n+1 x ’s changing law, thereby realizing the control of current within a single half-wave cycle when the load changes dynamically.

[0050] The present invention discloses a high-dynamic multi-level thyristor control method for a stacked power supply topology, which can improve the control performance of the stacked power supply under dynamic load conditions to prevent significant power fluctuations or overcurrent when the load changes. The method uses model prediction technology to quickly predict and adjust the stacking level and trigger time when the load changes dynamically, thereby achieving rapid control of the current. This rapid response capability is crucial to improving the stability and dynamic performance of the thyristor of a semi-controlled semiconductor device.

[0051] Related references: [1] Wang Qinchen, Fang Yimin. Simulation of AC voltage regulator based on nonlinear PI control[J]. Electronic Measurement Technology, 2019, 42(20): 58-62. [2] Song Kaisheng, Ma Hongzhong, Wang Huafang, et al. Design of segmented fast voltage regulation model based on thyristor[J]. Power System Protection and Control, 2019, 47(07): 135-141. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0052] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A high dynamic control method for a laminated power supply based on model prediction, characterized in that: include; The load impedance characteristics are calculated through the collected current sampling values ​​and the power supply output voltage; Based on the load impedance characteristics, when the load changes dynamically, the load change proportional coefficient is calculated by the stable value of the load impedance characteristics before and after the dynamic load change. d x ； Based on load change proportionality factor d x And the output voltage of the stacked power supply, the stacked power supply model is used to predict the number of stacked levels after the load changes n x and n x +1 trigger time t n+1 x The changing law of the load can realize the rapid control of the current in a single half-wave cycle when the load changes dynamically. The output voltage of the stacked power supply is calculated based on the condition of constant output current.

2. According to the model prediction-based high-dynamic control method of laminated power supply according to claim 1, it is characterized in that: The calculation formula of the load impedance characteristic is: ； Where: R x is the load impedance characteristic, u is the power supply output voltage, i is the current sampling value, k The number of discrete simulation calculations.

3. The high dynamic control method of a laminated power supply based on model prediction according to claim 1, characterized in that: The stacked power supply output voltage and the open level n and n +1 trigger time t n+1 The output voltage functions of the two variables are related.

4. The high dynamic control method of a laminated power supply based on model prediction according to claim 3 is characterized in that: The calculation formula of the output voltage of the stacked power supply is: ； In the formula, U u is the output voltage of the stacked power supply, w is the power supply angular frequency, n To open the level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply.

5. The high dynamic control method of a laminated power supply based on model prediction according to claim 1, characterized in that: The load change proportionality coefficient d x The calculation formula is: Where: d x is the load change proportional coefficient, R x a is the stable value before the load changes dynamically, R x b It is the stable value after dynamic load change.

6. The high dynamic control method of a laminated power supply based on model prediction according to claim 1, characterized in that: The function formula of the model prediction of the laminated power supply is: Where: d x is the load change proportional coefficient, w is the power supply angular frequency, n To open the level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply; n x is the number of stacking levels after dynamic load changes and t n+1 x The nth time after the load changes dynamically x +1 stack trigger time.

7. The high dynamic control method of laminated power supply based on model prediction according to claim 6, characterized in that: Predict the number of stacking levels after load changes n x and n x +1 trigger time t n+1 x The law of change, n x and t n+1 x along with d x , n and t n+1 The specific formula is: Where: d x is the load change proportional coefficient, w is the power angular frequency, n is the turn-on level, t n+1 For the n +1 layer of trigger time; u 1 is the output voltage amplitude of the first-layer power supply; n x is the number of stacking levels after dynamic load changes and t n+1 x The nth time after the load changes dynamically x +1 stack trigger time.

8. The high dynamic control method of laminated power supply based on model prediction according to claim 7, characterized in that: The specific process of controlling the current in a single half-wave cycle when the load changes dynamically is: When the load changes the regulated voltage less than the single-layer voltage, the n x +1 trigger time t n+1 x Regulation to achieve closed-loop control of the effective value of the current within half a cycle; When the load changes and the regulated voltage is greater than the single-layer voltage, the number of stacking levels is adjusted simultaneously. n x and n x +1 trigger time t n+1 x , to achieve the regulation of the effective value of current.

9. The high dynamic control method of a laminated power supply based on model prediction according to claim 1, characterized in that: The current sampling value and the power supply output voltage are collected by a voltage and current measuring device of the laminated power supply.

10. A high-dynamic control system for a laminated power supply based on model prediction, based on the high-dynamic control method for a laminated power supply based on model prediction according to any one of claims 1 to 9, characterized in that: include: A load impedance characteristic calculation unit, a proportional-integral controller, a load change proportional coefficient calculation unit, and a model prediction control unit; The load impedance characteristic calculation unit is used to calculate the load impedance characteristic through the collected current sampling value and the power supply output voltage; The proportional-integral controller is used to calculate the output voltage of the stacked power supply according to the constant output current condition; The load change proportionality coefficient calculation unit is used to calculate the load change proportionality coefficient based on the load impedance characteristics when the load changes dynamically by using the stable value of the load impedance characteristics before and after the load changes dynamically. d x ； The model predictive controller unit is based on the load change proportionality coefficient d x And the stack power supply output voltage, used to predict the stack level after the load changes n x and n x +1 trigger time t n+1 x ’s changing law, thereby realizing the control of current within a single half-wave cycle when the load changes dynamically.

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