CN111368438A - Energy simulation system and device - Google Patents
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Abstract
The disclosure relates to an energy simulation system, method and electronic device. Wherein, this system includes: the device comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module and a power supply module; the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module. The invention takes the isolated passive clamping phase-shifting full-bridge circuit as the main circuit, can realize high-power operation and wider voltage regulation range, realizes the electrical isolation protection of the inverter and enhances the safety performance of the system. The table look-up is used as a photovoltaic characteristic curve simulation mode, so that the quick response of the simulated photovoltaic characteristic curve is improved, and a large amount of storage space is not required to be occupied.
Description
Technical Field
The disclosure relates to the electrical field, and in particular, to an energy simulation system, method and electronic device.
Background
The solar photovoltaic grid-connected power generation becomes a main mode and a research hotspot for solar energy utilization due to the advantages of reproducibility, low pollution, easy transmission and the like, and in the debugging process of a photovoltaic grid-connected inverter, which is core equipment of the photovoltaic grid-connected power generation, if a physical solar photovoltaic array is used as input, the simulation debugging period is long due to factors such as illumination intensity, temperature and the like, and the debugging of the photovoltaic grid-connected inverter is limited due to the problems that the simulation is difficult to realize under various conditions and the like. The energy source simulation system can simulate the output of the solar characteristic curve under any temperature and illumination intensity conditions in a short time, so the development of the energy source simulation system solves the problems, greatly shortens the development period of the photovoltaic grid-connected inverter and reduces the cost of the photovoltaic grid-connected inverter.
The main circuit of the existing photovoltaic array simulator mainly adopts a BUCK circuit, a two-quadrant chopper circuit and other non-isolated circuits, so that the power is low, the boosting capacity is limited, and when the main circuit breaks down, due to the fact that no isolation transformer exists, rear-end equipment such as a photovoltaic inverter can be damaged.
The existing energy simulation system adopts a calculation method for simulating a photovoltaic characteristic curve, the calculation method is to calculate a current value in real time according to an input voltage in a mode of a photovoltaic curve equivalent relation, the photovoltaic curve equivalent relation cannot be directly calculated and generated through a function, and a large amount of calculation resources are required to be occupied through a common Newton iteration method, so that the response performance of the system is reduced, particularly when the shadow of a photovoltaic array is simulated, the photovoltaic curve equivalent relation is changed alternately, the calculation amount is increased in multiples, and the existing calculation method simulation cannot meet the requirement of real-time performance.
Accordingly, there is a need for one or more systems that address the above-mentioned problems.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide an energy simulation system, method, and electronic device, which overcome, at least to some extent, one or more of the problems due to the limitations and disadvantages of the related art.
According to an aspect of the present disclosure, there is provided an energy simulation system including:
the device comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module and a power supply module; wherein: the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module.
In an exemplary embodiment of the present disclosure, the rectifier module includes a three-phase uncontrolled rectifier bridge, a first filter capacitor C1 and a second filter capacitor C2, an input end of the three-phase uncontrolled rectifier bridge is connected to a three-phase alternating current power supply, and an output end of the three-phase uncontrolled rectifier bridge is connected to an input end of the isolation module; the first filter capacitor C1 and the second filter capacitor C2 are sequentially connected in series between the positive pole and the negative pole of the output end of the three-phase uncontrolled rectifier bridge.
In an exemplary embodiment of the present disclosure, the three-phase uncontrolled rectifier bridge is a three-phase full-wave uncontrolled rectifier bridge; the first filter capacitor C1 and the second filter capacitor C2 adopt a bolt type aluminum electrolytic capacitor in a series connection mode.
In an exemplary embodiment of the present disclosure, the isolation module is a passive clamping phase-shifting full bridge circuit with isolation, and includes an IGBT single-phase full bridge circuit, an isolation transformer, and a single-phase uncontrolled rectifier bridge; wherein: the input end of the IGBT single-phase full-bridge circuit is connected with the output end of the rectification module, the output end of the IGBT single-phase full-bridge circuit is connected with the primary winding of the isolation transformer, the secondary winding of the isolation transformer is connected with the input end of the single-phase uncontrolled rectifier bridge, and the output end of the single-phase uncontrolled rectifier bridge outputs direct-current voltage.
In an exemplary embodiment of the present disclosure, the single-phase uncontrolled rectifier bridge includes a single-phase rectifier bridge, a first current-limiting diode D1, a second current-limiting diode D2, a fifth capacitor C5, and an inductor L1;
the turn ratio of the primary side to the secondary side of the magnetic core of the isolation transformer is 1.1;
in an exemplary embodiment of the present disclosure, the inverter is a load, and a photovoltaic array inverter is adopted.
In an exemplary embodiment of the disclosure, the signal sampling module includes a voltage hall sensor VT1 and a current hall sensor CT1, a sampling end of the voltage hall sensor VT1 is connected in parallel to two ends of a sixth capacitor C6, an output end of the voltage hall sensor VT1 is connected to the control module, a sampling end of the current hall sensor CT1 is connected in series to a positive output end of a single-phase uncontrolled rectifier bridge in the isolation module, and an output end of the current hall sensor CT1 is connected to the control module.
In an exemplary embodiment of the present disclosure, the control module includes a table look-up unit, a comparison unit, a PID regulator and a pulse width generator; the input end of the table look-up unit is connected with the output end of the voltage Hall sensor VT1, the input end of the comparison unit is connected with the output end of the table look-up unit and the output end of the current Hall sensor CT1, the output end of the comparison unit is connected with the input end of the PID regulator, the output end of the PID regulator is connected with the input end of the pulse width generator, and the output end of the pulse width generator is connected with the input end of the driving.
In an exemplary embodiment of the present disclosure, the driving module is a driving circuit of the IGBT single-phase full-bridge circuit 21, and includes four driving circuits for driving the first IGBT transistor S1, the second IGBT transistor S2, the third IGBT transistor S3, and the fourth IGBT transistor S4, respectively.
In an exemplary embodiment of the present disclosure, the power module is an operating power supply of the control module.
In one aspect of the present disclosure, there is provided an energy source simulation method including:
a signal sampling step, namely receiving a voltage sampling value and a current sampling value sent by a sampling module;
a parameter table look-up step, namely looking up a corresponding theoretical current value of the voltage sampling signal in a data look-up table of a preset photovoltaic array curve;
and a PWM signal generation step, calculating the difference value between the theoretical current value and the current sampling value, and calculating and generating a PWM signal for driving the IGBT through PID parameters.
And a PWM signal driving step, wherein the PWM signal is loaded to a driving unit of each power element to complete the control of the energy simulation system.
In one aspect of the present disclosure, there is provided an electronic device including:
a processor; and
a memory having computer readable instructions stored thereon which, when executed by the processor, implement a system according to any of the above.
In an aspect of the disclosure, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the system according to any one of the above.
An energy source simulation system in an exemplary embodiment of the present disclosure includes: the device comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module and a power supply module; the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module. The invention takes the isolated passive clamping phase-shifting full-bridge circuit as the main circuit, can realize high-power operation and wider voltage regulation range, realizes the electrical isolation protection of the inverter and enhances the safety performance of the system. The table look-up is used as a photovoltaic characteristic curve simulation mode, so that the quick response of the simulated photovoltaic characteristic curve is improved, and a large amount of storage space is not required to be occupied.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 illustrates a block diagram of components of an energy simulation system according to an exemplary embodiment of the present disclosure;
FIG. 2 illustrates a circuit schematic of an energy source simulation system according to an exemplary embodiment of the present disclosure;
FIG. 3 shows a flow diagram of an energy source simulation method according to an example embodiment of the present disclosure;
fig. 4 schematically shows a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other systems, components, materials, devices, steps, and so forth. In other instances, well-known structures, systems, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in the form of software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
In the present exemplary embodiment, there is first provided an energy source simulation system; referring to fig. 1, the energy simulation system may include a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module, and a power module; wherein: the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module.
An energy source simulation system in an exemplary embodiment of the present disclosure includes: the device comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module and a power supply module; the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module. The invention takes the isolated passive clamping phase-shifting full-bridge circuit as the main circuit, can realize high-power operation and wider voltage regulation range, realizes the electrical isolation protection of the inverter and enhances the safety performance of the system. The table look-up is used as a photovoltaic characteristic curve simulation mode, so that the quick response of the simulated photovoltaic characteristic curve is improved, and a large amount of storage space is not required to be occupied.
Next, the energy source simulation system in the present exemplary embodiment will be further described.
As shown in fig. 1, the system includes a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module, and a power module; wherein: the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module.
In the exemplary embodiment, as shown in the schematic circuit diagram of the energy source simulation system shown in fig. 2, the rectifier module includes a three-phase uncontrolled rectifier bridge, a first filter capacitor C1 and a second filter capacitor C2, an input terminal of the three-phase uncontrolled rectifier bridge is connected to the three-phase alternating current power supply, and an output terminal of the three-phase uncontrolled rectifier bridge is connected to an input terminal of the isolation module; the first filter capacitor C1 and the second filter capacitor C2 are sequentially connected in series between the positive pole and the negative pole of the output end of the three-phase uncontrolled rectifier bridge.
In the embodiment of the example, the three-phase uncontrolled rectifier bridge is a three-phase full-wave uncontrolled rectifier bridge; the first filter capacitor C1 and the second filter capacitor C2 adopt a bolt type aluminum electrolytic capacitor in a series connection mode.
In the embodiment of the present example, the isolation module is a passive clamping phase-shifting full bridge circuit with isolation, and includes an IGBT single-phase full bridge circuit, an isolation transformer, and a single-phase uncontrolled rectifier bridge; wherein: the input end of the IGBT single-phase full-bridge circuit is connected with the output end of the rectification module, the output end of the IGBT single-phase full-bridge circuit is connected with the primary winding of the isolation transformer, the secondary winding of the isolation transformer is connected with the input end of the single-phase uncontrolled rectifier bridge, and the output end of the single-phase uncontrolled rectifier bridge outputs direct-current voltage.
In the embodiment of the present example, the single-phase uncontrolled rectifier bridge comprises a single-phase rectifier bridge, a first current-limiting diode D1, a second current-limiting diode D2, a fifth capacitor C5 and an inductor L1; the direct-current input end of the single-phase rectifier bridge is connected with the secondary winding of the isolation transformer, the positive electrode of the direct-current output end of the single-phase rectifier bridge is respectively connected with the inductor L1 and the fifth capacitor C5, the other end of the inductor L1 is the positive output end of the single-phase uncontrolled rectifier bridge, and the negative electrode of the direct-current output end of the single-phase uncontrolled rectifier bridge is the negative output end of the single-phase uncontrolled rectifier bridge; the other end of the fifth capacitor C5 is connected to the anode of the first current-limiting diode D1 and the cathode of the second current-limiting diode D2, respectively, the cathode of the first current-limiting diode D1 and one end of the sixth capacitor C6 are both connected to the positive output terminal of the single-phase uncontrolled rectifier bridge, and the anode of the second current-limiting diode D2 and the other end of the sixth capacitor C6 are both connected to the negative output terminal of the single-phase uncontrolled rectifier bridge.
The turn ratio of the primary side to the secondary side of the magnetic core of the isolation transformer is 1.1.
The IGBT single-phase full-bridge inverter circuit is an IGBT single-phase full-bridge inverter circuit and comprises a first IGBT tube S1, a second IGBT tube S2, a third IGBT tube S3, a fourth IGBT tube S4, a first absorption capacitor C3 and a second absorption capacitor C4; the first IGBT tube S1 and the third IGBT tube S3 constitute an ultra-front arm, in which: the collector of the first IGBT tube S1 is connected with the positive electrode of the output end of the rectifier module 1, the emitter of the third IGBT tube S3 is connected with the negative electrode of the output end of the rectifier module 1, the emitter of the first IGBT tube S1 is connected with the collector of the third IGBT tube S3, and the point is the middle point of the leading arm and is connected with one end of the primary winding of the isolation transformer; the second IGBT tube S2 and the fourth IGBT tube S4 constitute a hysteresis arm, wherein: the collector of the second IGBT tube S2 is connected with the positive electrode of the output end of the rectifier module 1, the emitter of the fourth IGBT tube S4 is connected with the negative electrode of the output end of the rectifier module 1, the emitter of the second IGBT tube S2 is connected with the collector of the fourth IGBT tube S4, and the point is the middle point of the lagging arm and is connected with the other end of the primary winding of the isolation transformer;
the first absorption capacitor C3 and the second absorption capacitor C4 are respectively connected in parallel to the output ends of the first IGBT tube S1 and the third IGBT tube S3.
In the embodiment of the present example, compared with the zero-voltage zero-current full-bridge phase shift circuit, the secondary side of the circuit shown in fig. 2 is added with the inductor L2, so that passive clamping of the secondary side is realized, and the passive clamping phase shift full-bridge circuit greatly suppresses the peak and oscillation on the secondary side rectifier tube due to the clamping circuit added on the primary side and the secondary side, thereby improving EMI, improving efficiency and the like.
In the embodiment of the present example, the inverter is a load, and a photovoltaic array inverter is adopted.
In the embodiment of the present example, the signal sampling module includes a voltage hall sensor VT1 and a current hall sensor CT1, a sampling end of the voltage hall sensor VT1 is connected in parallel to two ends of a sixth capacitor C6, an output end of the voltage hall sensor VT1 is connected to the control module, a sampling end of the current hall sensor CT1 is connected in series to a positive output end of a single-phase uncontrolled rectifier bridge in the isolation module, and an output end of the current hall sensor CT1 is connected to the control module.
In the embodiment of the example, the control module comprises a table look-up unit, a comparison unit, a PID regulator and a pulse width generator; the input end of the table look-up unit is connected with the output end of the voltage Hall sensor VT1, the input end of the comparison unit is connected with the output end of the table look-up unit and the output end of the current Hall sensor CT1, the output end of the comparison unit is connected with the input end of the PID regulator, the output end of the PID regulator is connected with the input end of the pulse width generator, and the output end of the pulse width generator is connected with the input end of the driving.
In the embodiment of the present example, the driving module is a driving circuit of the IGBT single-phase full-bridge circuit 21, and includes four driving circuits for respectively driving the first IGBT transistor S1, the second IGBT transistor S2, the third IGBT transistor S3, and the fourth IGBT transistor S4.
In the embodiment of the present example, the power module is an operating power supply of the control module.
In the embodiment of the present example, the control module implements the analog conversion of the photovoltaic characteristic curve by iterative computation in a table look-up unit. In an equivalent circuit of a solar photovoltaic cell panel, a photoelectric effect part can be regarded as a constant current source, the output current Iph of the constant current source is basically kept unchanged, and a photovoltaic characteristic curve formula expression is as follows:
wherein, IdIs the diode reverse saturation current with unit of A;
Iphthe unit of the photoproduction current of the solar photovoltaic cell is A;
q is a unit charge, the unit of which is C;
k is Boltzmann constant, which has the unit of J/K;
t is the absolute temperature corresponding to the solar photovoltaic cell, and the unit of T is K;
r and RshAre respectively series-parallel resistors with the unit of omega;
n is the diode factor.
In the control module, to realize the simulation of the photovoltaic curve, the simulated solar panel rated parameters, the known constant and the photovoltaic characteristic curve formula are stored, the sampling voltage value is substituted into the formula, the simulation of the photovoltaic characteristic curve is realized in advance through the calculation of simulation software, the theoretical current value corresponding to the sampling voltage value is obtained, and a data query table is generated according to a certain density, wherein the data query table comprises the corresponding relation between the sampling voltage and the theoretical current value. The comparison unit compares the sampling current value with a theoretical current value to obtain an error current value, the error current value is subjected to proportional-derivative-integral adjustment through a PID (proportion integration differentiation) regulator, the pulse width generator generates a PWM (pulse width modulation) signal according to the adjusted signal and sends the PWM signal to the driving module, so that the control of the main circuit is further realized, and the simulation of a photovoltaic characteristic curve is completed.
When photovoltaic characteristic curves of different solar panels are simulated, the solar panels need to be recalculated to generate a new data query table to replace the previous data query table, so that the change of the photovoltaic characteristic curves is realized.
It should be noted that although the various steps of the system of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve the desired results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
Furthermore, in the present exemplary embodiment, an energy simulation method is also provided. Referring to fig. 3, the energy source simulation method includes:
a signal sampling step, namely receiving a voltage sampling value and a current sampling value sent by a sampling module;
a parameter table look-up step, namely looking up a corresponding theoretical current value of the voltage sampling signal in a data look-up table of a preset photovoltaic array curve;
and a PWM signal generation step, calculating the difference value between the theoretical current value and the current sampling value, and calculating and generating a PWM signal for driving the IGBT through PID parameters.
And a PWM signal driving step, wherein the PWM signal is loaded to a driving unit of each power element to complete the control of the energy simulation system.
The specific details of each energy simulation method are already described in detail in the corresponding energy simulation system, and therefore, the details are not repeated here.
In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above system is also provided.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 400 according to such an embodiment of the invention is described below with reference to fig. 4. The electronic device 400 shown in fig. 4 is only an example and should not bring any limitation to the function and the scope of use of the embodiments of the present invention.
As shown in fig. 4, electronic device 400 is embodied in the form of a general purpose computing device. The components of electronic device 400 may include, but are not limited to: the at least one processing unit 410, the at least one memory unit 420, a bus 430 connecting different system components (including the memory unit 420 and the processing unit 410), and a display unit 440.
Wherein the memory unit stores program code that is executable by the processing unit 410 to cause the processing unit 410 to perform steps according to various exemplary embodiments of the present invention as described in the "exemplary systems" section above in this specification. For example, the processing unit 410 may perform steps S310 to S340 as shown in fig. 3.
The storage unit 420 may include readable media in the form of volatile storage units, such as a random access memory unit (RAM)4201 and/or a cache memory unit 4202, and may further include a read only memory unit (ROM) 4203.
The storage unit 420 may also include a program/utility 4204 having a set (at least one) of program modules 4205, such program modules 4205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 400 may also communicate with one or more external devices 470 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 400, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 400 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 450. Also, the electronic device 400 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) via the network adapter 460. As shown, the network adapter 460 communicates with the other modules of the electronic device 400 over the bus 440. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with electronic device 400, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the system according to the embodiments of the present disclosure.
Furthermore, the above-described figures are merely schematic illustrations of processes included in a system according to an exemplary embodiment of the present invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (12)
1. An energy source simulation system, characterized by: the energy simulation system comprises: the device comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module and a power supply module; wherein: the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power supply module is respectively connected with the driving module and the control module.
2. The energy source simulation system of claim 1, wherein: the rectifying module comprises a three-phase uncontrolled rectifying bridge, a first filter capacitor C1 and a second filter capacitor C2, the input end of the three-phase uncontrolled rectifying bridge is connected with a three-phase alternating current power supply, and the output end of the three-phase uncontrolled rectifying bridge is connected with the input end of the isolating module; the first filter capacitor C1 and the second filter capacitor C2 are sequentially connected in series between the positive pole and the negative pole of the output end of the three-phase uncontrolled rectifier bridge.
3. The energy source simulation system of claim 2, wherein: the three-phase uncontrolled rectifier bridge is a three-phase full-wave uncontrolled rectifier bridge; the first filter capacitor C1 and the second filter capacitor C2 adopt a bolt type aluminum electrolytic capacitor in a series connection mode.
4. The energy source simulation system of claim 1, wherein: the isolation module is a passive clamping phase-shifting full bridge circuit with isolation, and comprises an IGBT single-phase full bridge circuit, an isolation transformer and a single-phase uncontrolled rectifier bridge; wherein: the input end of the IGBT single-phase full-bridge circuit is connected with the output end of the rectification module, the output end of the IGBT single-phase full-bridge circuit is connected with the primary winding of the isolation transformer, the secondary winding of the isolation transformer is connected with the input end of the single-phase uncontrolled rectifier bridge, and the output end of the single-phase uncontrolled rectifier bridge outputs direct-current voltage.
5. The energy source simulation system of claim 4, wherein: the single-phase uncontrolled rectifier bridge comprises a single-phase rectifier bridge, a first current-limiting diode D1, a second current-limiting diode D2, a fifth capacitor C5 and an inductor L1;
the turn ratio of the primary side to the secondary side of the magnetic core of the isolation transformer is 1.1.
6. The energy source simulation system of claim 1, wherein: the inverter is a load and adopts a photovoltaic array inverter.
7. The energy source simulation system of claim 1, wherein: the signal sampling module comprises a voltage Hall sensor VT1 and a current Hall sensor CT1, the sampling end of the voltage Hall sensor VT1 is connected in parallel with the two ends of a sixth capacitor C6, the output end of the voltage Hall sensor VT1 is connected with the control module, the sampling end of the current Hall sensor CT1 is connected in series with the positive output end of a single-phase uncontrolled rectifier bridge in the isolation module, and the output end of the current Hall sensor CT1 is connected with the control module.
8. The energy source simulation system of claim 1, wherein: the control module comprises a table look-up unit, a comparison unit, a PID regulator and a pulse width generator; the input end of the table look-up unit is connected with the output end of the voltage Hall sensor VT1, the input end of the comparison unit is connected with the output end of the table look-up unit and the output end of the current Hall sensor CT1, the output end of the comparison unit is connected with the input end of the PID regulator, the output end of the PID regulator is connected with the input end of the pulse width generator, and the output end of the pulse width generator is connected with the input end of the driving.
9. The energy source simulation system of claim 1, wherein: the driving module is a driving circuit of the IGBT single-phase full-bridge circuit 21, and includes four driving circuits for respectively driving the first IGBT tube S1, the second IGBT tube S2, the third IGBT tube S3, and the fourth IGBT tube S4.
10. The energy source simulation system of claim 1, wherein: the power supply module is a working power supply of the control module.
11. An energy simulation method applied to an energy simulation system comprising any one of claims 1 to 10, the method comprising:
a signal sampling step, namely receiving a voltage sampling value and a current sampling value sent by a sampling module;
a parameter table look-up step, namely looking up a corresponding theoretical current value of the voltage sampling signal in a data look-up table of a preset photovoltaic array curve;
and a PWM signal generation step, calculating the difference value between the theoretical current value and the current sampling value, and calculating and generating a PWM signal for driving the IGBT through PID parameters.
And a PWM signal driving step, wherein the PWM signal is loaded to a driving unit of each power element to complete the control of the energy simulation system.
12. An electronic device, comprising:
a microprocessor; and the number of the first and second groups,
a memory having stored thereon computer-readable instructions which, when executed by the processor, implement the method as recited in claim 11.
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| CN103116118A (en) * | 2013-01-29 | 2013-05-22 | 东华大学 | Digital photovoltaic array imitator system based on look-up table |
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| CN106712527A (en) * | 2017-03-29 | 2017-05-24 | 天津瑞能电气有限公司 | Isolated type photovoltaic array simulator system based on calculation method |
| CN109586597A (en) * | 2018-12-15 | 2019-04-05 | 华南理工大学 | It is a kind of that power supply mould group is aoxidized based on phase shifting full bridge soft switch and the high frequency of synchronous rectification |
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| CN103116118A (en) * | 2013-01-29 | 2013-05-22 | 东华大学 | Digital photovoltaic array imitator system based on look-up table |
| CN103595287A (en) * | 2013-11-27 | 2014-02-19 | 东南大学 | Method for controlling double-direction power flow high-frequency isolated active clamping inverter |
| CN106712527A (en) * | 2017-03-29 | 2017-05-24 | 天津瑞能电气有限公司 | Isolated type photovoltaic array simulator system based on calculation method |
| CN109586597A (en) * | 2018-12-15 | 2019-04-05 | 华南理工大学 | It is a kind of that power supply mould group is aoxidized based on phase shifting full bridge soft switch and the high frequency of synchronous rectification |
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