CN116154809B - Self-adaptive control-based electrolytic hydrogen production control method - Google Patents
Self-adaptive control-based electrolytic hydrogen production control method Download PDFInfo
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- CN116154809B CN116154809B CN202310377527.5A CN202310377527A CN116154809B CN 116154809 B CN116154809 B CN 116154809B CN 202310377527 A CN202310377527 A CN 202310377527A CN 116154809 B CN116154809 B CN 116154809B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The invention belongs to the technical field of electrolytic hydrogen production, and provides an electrolytic hydrogen production control method based on self-adaptive control, which comprises the following steps: designing a topological structure of the electrolytic hydrogen production rectifier, wherein the topological structure is formed by connecting a main power converter and an auxiliary converter in parallel, the main power converter is used for establishing a proportional control relation between the system bus frequency and the output current, when the system bus frequency rises, the load power is increased when the output current of the main power converter is increased, and the auxiliary converter is used for realizing transient frequency adjustment; when the system receives disturbance input, the system analyzes the frequency oscillation process by taking the frequency as a measurement condition, establishes a dynamic relation of the auxiliary converter for adaptively changing the control parameters according to the angular frequency change rate and the angular speed change, and simultaneously, the auxiliary converter changes the output power due to the disturbance change of the system; when the system is unbalanced in power, the electrolytic hydrogen production load responds to the system power, adjusts the self power of the electrolytic hydrogen production load, and meets the frequency modulation requirement of the system.
Description
Technical Field
The invention relates to the field of electrolytic hydrogen production control, in particular to an electrolytic hydrogen production control method based on self-adaptive control.
Background
In the future, the ratio of Photovoltaic (PV) and Electric Vehicle (EV) access in a power distribution network will gradually increase, unlike a conventional power generation unit, the access of a distributed power source needs to realize energy transfer through a power electronic converter, but a micro-grid formed by connecting the power electronic converter with the distributed power source faces the problems of low inertia and low damping, because the stability problem caused by low inertia and low damping is particularly prominent, and the power generation volatility of the new energy source is strong. Effective frequency regulation measures are needed to ensure safe and stable operation of the new energy electrolytic hydrogen production system.
At present, a virtual synchronous machine or sagging control frequency modulation is adopted mainly based on a power generation or energy storage unit, a large amount of energy storage equipment is needed to be matched, the cost is high, and grid connection control and stability analysis are complex. The electrolytic stack in the hydrogen production load has large capacity and flexible and adjustable power, and is a natural physical resource capable of providing frequency modulation energy, so that the frequency modulation capacity of the hydrogen production load is fully exerted, and the frequency modulation requirement of a system is met. The interface rectifier is used as key equipment for realizing the frequency modulation capability of the electrolytic hydrogen production load, and the frequency modulation energy of the high-capacity electrolytic stack cannot be effectively transmitted due to the limitation of the currently used topology. The full-control rectifier has fast dynamic response, but low power level under the same cost, and is only suitable for realizing fast frequency support of a medium-small capacity electrolysis stack; the phase control rectifier has slow dynamic response but high power level, and can be matched with a large-capacity electrolysis stack to be used as a frequency modulation main force. Therefore, in order to fully utilize the high-capacity electrolysis stack to realize multi-time/multi-power/multi-energy scale frequency adjustment, a novel rectifier hybrid topology structure should be studied to provide a suitable channel for multi-scale frequency modulation energy transmission.
Disclosure of Invention
The invention aims to provide an electrolytic hydrogen production control method based on self-adaptive control, which can fully utilize a high-capacity electrolytic stack to realize multi-time/multi-power/multi-energy scale frequency adjustment and provide a proper channel for multi-scale frequency modulation energy transmission through a novel rectifier mixed topological structure.
The invention solves the technical problems and adopts the following technical scheme:
the electrolytic hydrogen production control method based on the self-adaptive control comprises the following steps:
designing a topological structure of an electrolytic hydrogen production rectifier, wherein the topological structure is formed by connecting a main power converter and an auxiliary converter in parallel, the main power converter is used for establishing a proportional control relation between the system bus frequency and the output current, when the system bus frequency rises, the output current of the main power converter increases, the load power increases, and the auxiliary converter is used for realizing transient frequency adjustment;
when the system receives disturbance input, the system reflects the response behavior of the system through various measurement conditions, analyzes the frequency oscillation process by taking frequency as the measurement condition, establishes a dynamic relation of the auxiliary converter for adaptively changing the control parameters according to the angular frequency change rate and the angular speed change, and simultaneously, changes the output power of the auxiliary converter due to the disturbance change of the system, suppresses frequency oscillation and improves the transient response capability of the system;
when the system is unbalanced in power, the electrolytic hydrogen production load responds to the system power, adjusts the self power of the electrolytic hydrogen production load, and meets the system frequency modulation requirement.
As a further optimization, the main power converter adopts a multi-pulse thyristor rectifier, and the auxiliary converter adopts a three-level PWM rectifier and DC/DC double-active-bridge converter cascade structure.
As further optimization, the power control outer ring of the three-level PWM rectifier adopts a self-adaptive virtual synchronous machine control strategy for adjusting the power flowing through the auxiliary converter, so as to realize the frequency adjustment of moment of inertia and damping support, and the DC/DC double-active bridge converter adopts a droop control strategy based on proportional-differential for adjusting the power flowing through the auxiliary converter in the frequency modulation process in cooperation with the three-level PWM rectifier, so as to maintain the stability of the DC bus voltage in the auxiliary converter.
As a further optimization, when the power control outer ring of the three-level PWM rectifier adopts an adaptive virtual synchronous machine control strategy, the modeling analysis is similar to the classical second-order model pair modeling analysis of the traditional synchronous generator, and when the pole pair number is 1 here, the mechanical angular velocity and the electrical angular velocity of the synchronous generator are equal, so that the rotor motion equation can be obtained as follows:
wherein: j is rotational inertia; d is a damping coefficient;is the power angle of the generator; />For mechanical power +.>For electromagnetic power +.>Is the angular frequency of the virtual synchronous machine, +.>The rated angular frequency of the power grid is set, and t is time.
As a further optimization, the rotor motion equation in the active power control loop of the virtual synchronous machine is as follows:
the virtual speed regulator control equation in the virtual synchronous machine control active power loop is as follows:
；
wherein:an active power instruction value is output for the rectifier, and K is a proportional coefficient of the speed regulator;
the active power loop control equation of the virtual synchronous machine can be obtained by combining the two methods as follows:
。
as a further optimization, the self-adaptive control principle analysis is performed on J and D based on the static stability adjustment principle of the synchronous generator, and the formula is as follows:
wherein: />For electromagnetic torque +.>In order to be a mechanical torque,is the angular velocity difference;
order theThen it is possible to obtain:
/>； /> />。
as a further optimization, the adaptive control of J and D was designed based on the topology of the electrolytic hydrogen rectifier as follows:
wherein:and->Value for stable operation of VSG +.>And->Is->A threshold of variation for preventing minute frequency fluctuations from causing J and D variations, +.>And->Is->Threshold of change->Is the adjustment coefficient.
The beneficial effects of the invention are as follows: according to the self-adaptive control-based electrolytic hydrogen production control method, after the system is subjected to disturbance input, the system has various measurement conditions to reflect the response behavior of the system, the frequency oscillation process is analyzed by taking the frequency as the measurement condition, the dynamic relation of the auxiliary converter for adaptively changing the control parameters according to the angular frequency change rate and the angular speed change is established, and meanwhile, the auxiliary converter correspondingly changes the output power of the auxiliary converter due to the disturbance change of the system, so that the frequency oscillation is effectively restrained, the transient response capacity of the system is improved, the electrolytic hydrogen production load capable of providing frequency modulation energy is utilized, when the system is unbalanced in power, the electrolytic hydrogen production load responds to the system power, the self power of the system is regulated, and the frequency modulation requirement of the system is met.
Drawings
FIG. 1 is a flow chart of an adaptive control-based electrolytic hydrogen production control method provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a hybrid rectifier for electrolytic hydrogen production in an embodiment of the invention;
FIG. 3 is a flow chart of an adaptive control strategy implementation in an embodiment of the present invention;
FIG. 4 is a control block diagram of a virtual synchronous generator in an embodiment of the present invention;
FIG. 5 is a graph showing the angle of attack characteristics of a synchronous generator according to an embodiment of the present invention;
FIG. 6 is a graph showing the oscillation of angular frequency according to an embodiment of the present invention;
FIG. 7 is a waveform diagram of system frequency after the system is disturbed when a control strategy is not applied during simulation verification in the embodiment of the invention;
FIG. 8 is a waveform diagram of system frequency after the system is disturbed when a control strategy is applied during simulation verification in an embodiment of the present invention;
FIG. 9 is a diagram of power waveforms after a system is disturbed when a control strategy is not applied during simulation verification in an embodiment of the present invention;
FIG. 10 is a waveform diagram of power after a disturbance occurs to a system when a control strategy is applied during simulation verification in an embodiment of the present invention;
fig. 11 is a graph of the power delivered by different hybrid topologies in accordance with an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Examples
The embodiment provides an electrolytic hydrogen production control method based on self-adaptive control, the flow chart of which is shown in fig. 1, wherein the method comprises the following steps:
s1, designing a topological structure of an electrolytic hydrogen production rectifier, wherein the topological structure is formed by connecting a main power converter and an auxiliary converter in parallel, the main power converter is used for establishing a proportional control relation between the system bus frequency and an output current piece, when the system bus frequency rises, the load power is increased when the output current of the main power converter is increased, and the auxiliary converter is used for realizing transient frequency adjustment;
in this embodiment, as shown in fig. 2, the topology structure of the electrolytic hydrogen production rectifier is formed by connecting a multi-pulse (6-pulse in this embodiment) thyristor rectifier and an auxiliary converter in parallel, wherein the auxiliary converter adopts a three-level PWM rectifier (NPC) and DC/DC double-active-bridge converter (DAB) cascade structure, and is mainly used for realizing transient frequency adjustment, such as rotational inertia and damping support.
The power control outer ring of the three-level PWM rectifier adopts a self-adaptive virtual synchronous machine control strategy to adjust the power flowing through the auxiliary converter, so that quick frequency adjustment of moment of inertia, damping support and the like is realized. The DAB converter adopts a droop control strategy based on proportional-differential, and is matched with a three-level PWM rectifier to regulate the power flowing through the auxiliary converter in the rapid frequency regulation process, so that the stability of the DC bus voltage in the auxiliary converter is maintained. The thyristor rectifier realizes the primary frequency modulation function by establishing a proportional control relation between the system bus frequency and the output current, namely when the system bus frequency rises, the output current of the thyristor rectifier increases, namely the load power increases, and the bus frequency is prevented from continuously increasing.
S2, after the system receives disturbance input, the system reflects the response behavior of the system through various measurement conditions, analyzes the frequency oscillation process by taking frequency as the measurement condition, establishes a dynamic relation of the auxiliary converter for adaptively changing the control parameters according to the angular frequency change rate and the angular speed change, and simultaneously, changes the output power of the auxiliary converter due to the disturbance change of the system, suppresses frequency oscillation and improves the transient response capability of the system;
s3, utilizing the electrolytic hydrogen production load capable of providing frequency modulation energy, and when the system is unbalanced in power, the electrolytic hydrogen production load responds to the system power, adjusts the self power of the electrolytic hydrogen production load, and meets the frequency modulation requirement of the system.
It should be noted that when the power control outer loop of the three-level PWM rectifier adopts the control strategy of the adaptive virtual synchronous machine, the modeling analysis is similar to the classical second-order model pair modeling analysis of the traditional synchronous generator, and when the pole pair number is 1 here, the mechanical angular velocity and the electrical angular velocity of the synchronous generator are equal, so that the rotor motion equation can be obtained as follows:
wherein: j is rotational inertia; d is a damping coefficient;is the power angle of the generator; />For mechanical power +.>For electromagnetic power +.>Is the angular frequency of the virtual synchronous machine, +.>The rated angular frequency of the power grid is set, and t is time.
Here, the equation of motion of the rotor in the active power control loop of the virtual synchronous machine is as follows:
the virtual speed regulator control equation in the virtual synchronous machine control active power loop is as follows:
；
wherein:an active power instruction value is output for the rectifier, and K is a proportional coefficient of the speed regulator;
the active power loop control block diagram of the virtual synchronous machine can be obtained by combining the two types, as shown in fig. 4, and the active power loop control equation of the virtual synchronous machine is as follows:
。
and (3) carrying out self-adaptive control principle analysis on J and D based on a static stability regulation principle of the synchronous generator, wherein a control principle diagram is shown in fig. 3, and the formula is as follows:
wherein: />For electromagnetic torque +.>In order to be a mechanical torque,is the angular velocity difference;
order theThen it is possible to obtain:
/>； /> />。
as can be seen from the above, whenThe larger D is, the more imaginary when constantThe greater the damping of the pseudo-synchronous machine (VSG), the +.>The smaller; when->The larger J is, the larger the inertia of VSG is, the +.>The smaller; and->And->When the signs of (D) are different, the variation of D is opposite +.>There is also a certain effect, and too large or too small a parameter value may also cause instability of the system.
Therefore, in order to ensure the stability of the frequency, the moment of inertia J and the damping coefficient D are adjusted by a proper method to improve the stability of the system, thereby inhibitingAnd->. When the active power of the system changes, the system will switch from the original stable operating point to the new stable operating point, the synchronous generator power characteristic curve is shown in fig. 5, at this time, the change of attack angle presents a repeated damping oscillation, the oscillation curve is shown in fig. 6, and for the convenience of analysis, one oscillation period of fig. 6 is divided into four sections, namely section (1)/(2)>，②/>，③/>，④/>The power variation and angle of attack variation characteristics are different for each interval, as are the adjustment methods required.
In interval (1), the virtual rotor angular velocity due to the power increaseIncrease, corresponding->The mutation is followed by gradual decrease to 0, J can be increased to inhibit +.>To prevent +.>Excessive speed overshoot, while D can be increased to decrease +.>And->To restrict->Thereby inhibiting overshoot. In section (2)/(>At this time, the->Is in a decelerating state, but->The angular velocity of the virtual synchronous machine is still greater than the nominal angular velocity, at which stage a smaller J should be used to accelerate the angular velocity back to nominal value, while D should be increased to further suppress +.>To suppress the angular velocity from being deviated. Therefore, D can be increased and +.>Is not yet restored. Similarly, in the intervals (3) and (4), the selection principle of J and D is similar to that of the intervals (1) and (2), and will not be repeated.
Specifically, in this embodiment, the adaptive control of J and D is designed based on the topology of the electrolytic hydrogen rectifier as follows:
wherein:and->Value for stable operation of VSG +.>And->Is->A threshold of variation for preventing minute frequency fluctuations from causing J and D variations, +.>And->Is->Threshold of change->Is the adjustment coefficient.
The control strategy flow chart of this embodiment is shown in fig. 3.
In the embodiment, a simulation model is built in MATLAB/Simulink, in order to verify the effectiveness of the control strategy in the embodiment, system disturbance is added at 5.5S, the system frequency is changed, fig. 7 is a system frequency waveform diagram after the system is disturbed when the control strategy is not added during simulation verification, and fig. 8 is a system frequency waveform diagram after the system is disturbed when the control strategy is added during simulation verification. As can be seen from comparison, when the control strategy is not added, the system frequency reaches 49.54Hz at the lowest point of 5.83S, and when the control strategy is added, the system frequency is 49.63Hz at the same time of 5.83S, the oscillation amplitude of the system frequency is much smaller, the oscillation time is shorter, and the system frequency can be recovered to a stable state more quickly. It can be seen from fig. 9 and 10 that the total power of the system is maintained unchanged, when the load of the system increases, the converter bears all power changes, and the hydrogen production power needs to be reduced at the moment, so as to stably provide corresponding power for the system, thus embodying flexible and adjustable power of the electrolysis stack, flexibly adjusting the power according to the system changes, providing a new method for providing frequency modulation energy for the system, and fully playing the frequency modulation capability of the hydrogen production load and meeting the frequency modulation requirement of the system.
The hybrid rectifier proposed in this embodiment has twice the power for transient frequency adjustment and can provide more inertial support than other hybrid rectifiers with the same capacity, as specifically analyzed below:
if the auxiliary converter PSFB and DAB capacities are both 100kW, assuming that the auxiliary converter steady state operating power is 50kW,100kW of PSFB and 100kW of DAB can provide the frequency modulation energy as shown in fig. 11. Further description is made here of the frequency modulation energy, because the load in the invention is hydrogen production load, when the hydrogen production load participates in the system frequency modulation auxiliary service, the transient frequency modulation energy for adjusting the frequency change required by the auxiliary converter relates to the active balance service in the electric market auxiliary service. The active balance service comprises electric auxiliary services such as frequency modulation, peak shaving, standby, moment of inertia, climbing and the like. The invention provides a rotational inertia service, which is a service provided by a grid-connected main body for preventing sudden change of system frequency by providing rapid positive damping responding to the system frequency change rate according to self inertia characteristics when the system is subjected to disturbance.
The frequency modulation energy that the provider of the auxiliary service in the electric market needs to provide should be positive and negative symmetric at the steady state operating power point of the system, i.e. to ensure symmetric transient frequency modulation capability, the converter should have the same fast frequency modulation capability no matter whether the system frequency increases or decreases. For a 100kW PSFB structure, if the steady state is 50kW, the frequency modulation energy to be provided by the PSFB structure is 50 kW+/-50 kW, and is 0-100 kW, namely the capacity of the structure. For 100kWDAB, the frequency modulation energy provided by the system is-100 kW-100 kW, but the requirement of 50 kW+/-100 kW is not met, so that when the power auxiliary service market provider is bidding, the power of the auxiliary converter can be reduced to 0 first, and at the moment, the service of reducing ripple component is not provided, and double frequency modulation energy can be provided under the condition that DAB and PSFB have the same capacity.
I.e., when the system frequency decreases, hydrogen production power is reduced,
when the system frequency increases, the hydrogen production power is increased.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The electrolytic hydrogen production control method based on the self-adaptive control is characterized by comprising the following steps of:
designing a topological structure of an electrolytic hydrogen production rectifier, wherein the topological structure is formed by connecting a main power converter and an auxiliary converter in parallel, the main power converter is used for establishing a proportional control relation between the system bus frequency and the output current, when the system bus frequency rises, the output current of the main power converter increases, the load power increases, and the auxiliary converter is used for realizing transient frequency adjustment;
when the system receives disturbance input, the system reflects the response behavior of the system through various measurement conditions, analyzes the frequency oscillation process by taking frequency as the measurement condition, establishes a dynamic relation of the auxiliary converter for adaptively changing the control parameters according to the angular frequency change rate and the angular speed change, and simultaneously, changes the output power of the auxiliary converter due to the disturbance change of the system, suppresses frequency oscillation and improves the transient response capability of the system;
when the system is unbalanced in power, the electrolytic hydrogen production load responds to the system power, adjusts the self power of the electrolytic hydrogen production load and meets the system frequency modulation requirement;
the main power converter adopts a multi-pulse thyristor rectifier, and the auxiliary converter adopts a three-level PWM rectifier and DC/DC double-active-bridge converter cascade structure;
the power control outer ring of the three-level PWM rectifier adopts a self-adaptive virtual synchronous machine control strategy for adjusting the power flowing through the auxiliary converter to realize the frequency adjustment of moment of inertia and damping support, and the DC/DC double-active-bridge converter adopts a droop control strategy based on proportional-differential for adjusting the power flowing through the auxiliary converter in the frequency modulation process by matching with the three-level PWM rectifier to maintain the stability of the DC bus voltage in the auxiliary converter;
when the power control outer ring of the three-level PWM rectifier adopts a self-adaptive virtual synchronous machine control strategy, the modeling analysis is similar to the classical second-order model pair modeling analysis of the traditional synchronous generator, and when the pole pair number is 1, the mechanical angular speed and the electrical angular speed of the synchronous generator are equal, so that the rotor motion equation can be obtained as follows:
wherein: j is rotational inertia; d is a damping coefficient;is the power angle of the generator; />For mechanical power +.>For electromagnetic power +.>Is the angular frequency of the virtual synchronous machine, +.>The rated angular frequency of the power grid is set, and t is time;
the equation of motion of the rotor in the active power control loop of the virtual synchronous machine is as follows:
the virtual speed regulator control equation in the virtual synchronous machine control active power loop is as follows:
；
wherein:an active power instruction value is output for the rectifier, and K is a proportional coefficient of the speed regulator;
the active power loop control equation of the virtual synchronous machine can be obtained by combining the two methods as follows:
；
and (3) carrying out self-adaptive control principle analysis on J and D based on a static stable regulation principle of the synchronous generator, wherein the formula is as follows:
wherein: />For electromagnetic torque +.>For mechanical torque +.>Is the angular velocity difference;
order theThen it is possible to obtain:
； />；
the self-adaptive control of J and D is designed based on the topological structure of the electrolytic hydrogen production rectifier as follows:
wherein:and->Value +.>And->Is->A threshold of variation for preventing minute frequency fluctuations from causing J and D variations, +.>And->Is->Threshold of change->Is the adjustment coefficient.
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| CN107465189A (en) * | 2017-08-21 | 2017-12-12 | 上海电力学院 | Virtual synchronous generator control method based on adaptive rotary inertia |
| CN113098002A (en) * | 2021-04-06 | 2021-07-09 | 贵州电网有限责任公司 | Self-adaptive control method for inertia and damping of grid-connected inverter |
| CN115603338A (en) * | 2022-12-14 | 2023-01-13 | 四川大学（Cn） | Rectifier with transient frequency modulation power bidirectional output capability and control method |
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| CN112653160B (en) * | 2020-12-17 | 2022-08-19 | 四川大学 | Active power grid frequency support control method based on virtual synchronous generator |
| CN115021593B (en) * | 2022-08-09 | 2022-11-01 | 四川大学 | Control method of hybrid rectifier with multi-scale frequency modulation capability |
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| CN107465189A (en) * | 2017-08-21 | 2017-12-12 | 上海电力学院 | Virtual synchronous generator control method based on adaptive rotary inertia |
| CN113098002A (en) * | 2021-04-06 | 2021-07-09 | 贵州电网有限责任公司 | Self-adaptive control method for inertia and damping of grid-connected inverter |
| CN115603338A (en) * | 2022-12-14 | 2023-01-13 | 四川大学（Cn） | Rectifier with transient frequency modulation power bidirectional output capability and control method |
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