CN115047786A - Multi-module cascade type power grid simulator control system - Google Patents

Multi-module cascade type power grid simulator control system Download PDF

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Publication number
CN115047786A
CN115047786A CN202210796510.9A CN202210796510A CN115047786A CN 115047786 A CN115047786 A CN 115047786A CN 202210796510 A CN202210796510 A CN 202210796510A CN 115047786 A CN115047786 A CN 115047786A
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module
fpga
dsp
data
signals
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焦道海
王庆发
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Changzhou Sino Sea Elecpower Co ltd
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Changzhou Sino Sea Elecpower Co ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B17/00—Systems involving the use of models or simulators of said systems
    • G05B17/02—Systems involving the use of models or simulators of said systems electric

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
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Abstract

The invention discloses a multi-module cascade type power grid simulator control system; the intelligent power grid power supply comprises a data signal input end, wherein the signal input end is electrically connected with a DSP module, the DSP is electrically connected with three FPGA modules, the three FPGA modules are electrically connected with an optical/electrical conversion module, the optical/electrical conversion module is electrically connected with a power module on a power grid, and a level conversion plate is electrically connected between the optical/electrical conversion module and the FPGA module; the invention has the advantages of synchronism, small time delay and the like, receives fault signals through the FPGA module, simultaneously blocks the output of PWM signals, transmits the fault signals to the DSP module, converts PWM driving signals from electric signals into optical signals in order to reduce the influence of interference on a control system, increases or decreases the number of the FPGA module according to the number of the PWM signals actually used, has strong adaptability, adopts EMIF communication between the DSP module and the FPGA module, and has high communication speed and small time delay.

Description

Multi-module cascade type power grid simulator control system
Technical Field
The invention belongs to the technical field of power grid simulators, and particularly relates to a multi-module cascade type power grid simulator control system.
Background
Along with the development of power and power technologies, more and more power electronic devices are applied more and more widely, the power electronic devices are gradually developed to high power, most of main control chips of the power electronic devices are DSP at present, but a large-capacity power electronic device needs a plurality of IGBT modules, and the number of PWM signals output by a single DSP chip is limited, so that the requirements of the large-capacity power electronic device cannot be met.
Disclosure of Invention
The present invention is directed to a multi-module cascaded grid simulator control system to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a multi-module cascade type power grid simulator control system comprises a data signal input end, wherein the signal input end is electrically connected with a DSP module, the DSP is electrically connected with three FPGA modules, the three FPGA modules are electrically connected with an optical/electrical conversion module, the optical/electrical conversion module is electrically connected with a power module on a power grid, and a level conversion plate is electrically connected between the optical/electrical conversion module and the FPGA module;
the signal input end is used for acquiring and inputting digital signals and analog signals, maintaining the accuracy and stability of data information and realizing the acquisition of the data information at any time;
the DSP module is used for realizing acquisition and processing of data information and operation of a control algorithm, and the DSP module realizes control and adjustment of a system;
the FPGA module is used for calculating and outputting PWM driving signals through PWM duty ratio data, blocking the output of the PWM signals and transmitting fault signals to the DSP module through a communication bus;
the optical/electrical conversion module is used for eliminating strong electromagnetic interference when the high-power electronic equipment runs, reducing the influence of the interference on a control system, converting the PWM driving signal into an optical signal from an electrical signal and then transmitting the optical signal to the IGBT power module.
Preferably, the DSP module and the FPGA modules form a PWM driving control system, and the DSP module transmits PWM duty ratio data to the FPGA modules through a data bus.
Preferably, the number of the FPGA modules in the PWM driving control system is increased or decreased according to the number of actually used PWM signals, EMIF communication is adopted between the DSP module and the FPGA module, and the EMIF communication flexibly extends the number of FPGA chips.
Preferably, one of the DSP modules and three of the FPGA modules form a module cascade type three-phase power grid simulator, and the three FPGA modules respectively control and detect the IGBT modules of the a phase, the B phase, and the C phase of the device.
Preferably, the AD module in the DSP module is an analog signal sampling module, and is configured to detect analog data of voltage, current, and temperature during operation of the device; the communication module in the DSP module is used for communicating with the upper computer, sending data to the upper computer and receiving a control instruction sent by the upper computer; the GPIO module in the DSP module is used for detecting and controlling digital signals; the data processing module in the DSP module is a core unit of the DSP module and is used for analyzing and processing all data, including AD sampling data processing, external digital signal detection data processing, fault signal detection processing, communication data processing and control algorithm realization; and the EMIF module in the DSP module is used for communicating with the FPGA module and transmitting PWM duty ratio data and fault signals.
Preferably, the GPIO module in the FPGA module is configured to perform digital signal transmission with the DSP module, and includes a device start-stop signal and a fast failure signal, the EMIF module in the FPGA module is configured to communicate with the DSP module, and the failure processing module in the FPGA module is configured to process a received driving failure and an overcurrent failure; the data processing module in the FPGA module analyzes and processes all data, including data transmitted by the EMIF module between the FPGA module and the DSP module, data received by the GPIO module, data sent by the GPIO module and fault data; and the PWM generating module in the FPGA module is used for generating a PWM signal for controlling the IGBT module.
Preferably, the digital signal level received by the FPGA module is 3.3V, it is necessary to perform level conversion on the PWM signal and the fault signal, the level conversion board realizes that the digital signal level is converted from 3.3V to 5V or from 5V to 3.3V, and increases the driving capability of the signal.
Preferably, the optical/electrical conversion module converts an electrical signal into an optical signal and converts the optical signal into the electrical signal, the optical signal is not subjected to electromagnetic interference when being transmitted in a long distance, and one of the power modules is electrically connected with one of the optical/electrical conversion modules.
Preferably, the power module adopts a three-phase H bridge or a single-phase H bridge formed by IGBT modules.
Preferably, the phase a, the phase B, and the phase C are electrically connected to ten optical/electrical conversion modules, and the ten optical/electrical conversion modules are individually connected to one power module.
Compared with the prior art, the invention has the beneficial effects that:
the invention has the advantages of synchronism, small time delay and the like, the FPGA module receives the fault signal from the IGBT power module, simultaneously the FPGA module blocks the output of the PWM signal at the first time, simultaneously the fault signal is transmitted to the DSP module through the communication bus, and the high-power electronic equipment has stronger electromagnetic interference during operation.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
fig. 2 is a control structure diagram of the module cascade type three-phase power grid simulator of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a multi-module cascade type power grid simulator control system comprises a data signal input end, wherein the signal input end is electrically connected with a DSP module, the DSP is electrically connected with three FPGA modules, the three FPGA modules are electrically connected with an optical/electrical conversion module, the optical/electrical conversion module is electrically connected with a power module on a power grid, and a level conversion plate is electrically connected between the optical/electrical conversion module and the FPGA module;
the signal input end is used for acquiring and inputting digital signals and analog signals, maintaining the accuracy and stability of data information and realizing the acquisition of the data information at any time;
the DSP module is used for realizing acquisition and processing of data information and running of a control algorithm, and the DSP module realizes control and adjustment of a system;
the FPGA module is used for calculating and outputting PWM driving signals through PWM duty ratio data, blocking the output of the PWM signals and transmitting fault signals to the DSP module through a communication bus;
the optical/electrical conversion module is used for eliminating strong electromagnetic interference when the high-power electronic equipment runs, reducing the influence of the interference on a control system, converting the PWM driving signal into an optical signal from an electrical signal and then transmitting the optical signal to the IGBT power module.
In order to output information and complete driving of a PWM signal, in this embodiment, preferably, the DSP module and the plurality of FPGA modules form a PWM driving control system, and the DSP module transmits PWM duty cycle data to the FPGA module through a data bus.
In order to make the system have wide adaptability, be convenient for use, and improve communication speed, in this embodiment, preferably, the number of the FPGA modules in the PWM driving control system is increased or decreased according to the number of the PWM signals actually used, the DSP module and the FPGA module adopt EMIF communication, and the number of the extended FPGA chips with flexible EMIF communication is used.
In order to realize effective control and detection of three-phase power, in this embodiment, preferably, one of the DSP modules and three of the FPGA modules form a module cascade type three-phase power grid simulator, and the three FPGA modules respectively control and detect the IGBT modules of the a phase, the B phase, and the C phase of the device.
In order to implement processing, controlling, communicating, and calculating of signals, in this embodiment, preferably, the AD module in the DSP module is an analog signal sampling module, and is configured to detect analog data of voltage, current, and temperature of the device during operation; the communication module in the DSP module is used for communicating with the upper computer, sending data to the upper computer and receiving a control instruction sent by the upper computer; the GPIO module in the DSP module is used for detecting and controlling digital signals; the data processing module in the DSP module is a core unit of the DSP module and is used for analyzing and processing all data, including AD sampling data processing, external digital signal detection data processing, fault signal detection processing, communication data processing and control algorithm realization; and the EMIF module in the DSP module is used for communicating with the FPGA module and transmitting PWM duty ratio data and fault signals.
In order to transmit data information and process fault information, in this embodiment, preferably, the GPIO module in the FPGA module is configured to transmit digital signals between the GPIO module and the DSP module, where the GPIO module includes an apparatus start-stop signal and a fast fault signal, the EMIF module in the FPGA module is configured to communicate with the DSP module, and the fault processing module in the FPGA module is configured to process received driving faults and overcurrent faults; the data processing module in the FPGA module analyzes and processes all data, including data transmitted by the EMIF module between the FPGA module and the DSP module, data received by the GPIO module, data sent by the GPIO module and fault data; and the PWM generating module in the FPGA module is used for generating a PWM signal for controlling the IGBT module.
In order to effectively adjust the signal voltage and improve the driving capability of the signal, in this embodiment, preferably, the digital signal level received by the FPGA module is 3.3V, it is necessary to perform level conversion on the PWM signal and the fault signal, the level conversion board converts the digital signal level from 3.3V to 5V or from 5V to 3.3V, and increases the driving capability of the signal.
In order to reduce manual electromagnetic interference of the system and improve the accuracy and stability of the signal, in this embodiment, preferably, the optical/electrical conversion module converts an electrical signal into an optical signal and converts the optical signal into the electrical signal, and the optical signal is not subjected to electromagnetic interference when being transmitted in a long distance, and one of the power modules is electrically connected to one of the optical/electrical conversion modules.
In order to effectively implement the setting of the power module and improve the use effect of the power module, in this embodiment, it is preferable that the power module adopts a three-phase H-bridge or a single-phase H-bridge composed of IGBT modules.
In order to implement separate control and adjustment processing, in this embodiment, it is preferable that ten optical/electrical conversion modules are respectively and electrically connected to the phase a, the phase B, and the phase C, and one power module is respectively and separately connected to each of the ten optical/electrical conversion modules.
The working principle and the using process of the invention are as follows: the PWM driving control system is composed of a DSP module and a plurality of FPGA modules, analog quantity collection and control algorithms are mainly completed by the DSP module, the DSP module transmits PWM duty ratio data to the FPGA module through a data bus, the FPGA module calculates and outputs PWM driving signals through the PWM duty ratio data, and meanwhile, the FPGA module receives fault signals from the IGBT power module. When a fault occurs, the FPGA module blocks the output of the PWM signal at the first time, simultaneously transmits the fault signal to the DSP module through the communication bus, and the high-power electronic equipment has stronger electromagnetic interference during operation. In the PWM drive control system, the number of the FPGA module can be increased or reduced according to the number of the PWM signals actually used, EMIF communication is adopted between the DSP module and the FPGA module, the communication speed is high, and the time delay is small. EMIF communication can flexibly expand the number of FPGA modules.
The control scheme of the module cascade type three-phase power grid simulator comprises a DSP module and three FPGA modules, wherein the three FPGA modules respectively control and detect IGBT modules of an A phase, a B phase and a C phase of equipment. An AD module in the DSP module samples analog signals and is used for detecting analog data such as voltage, current, temperature and the like of equipment operation; the communication module is used for communicating with the upper computer, transmitting data to the upper computer and receiving a control instruction transmitted by the upper computer; the GPIO module is used for detecting and controlling digital signals; the data processing module is a core unit of the DSP module and is used for analyzing and processing all data, including AD sampling data processing, external digital signal detection data processing, fault signal detection processing, communication data processing, control algorithm realization and the like; the EMIF module is used for communicating with the FPGA chip and transmitting PWM duty ratio data, fault signals and the like. The GPIO module in the FPGA module is used for carrying out digital signal transmission between the FPGA module and the DSP module, and comprises a device start-stop signal, a quick fault signal and the like; the EMIF module is used for communicating with the DSP module; the fault processing module is used for processing the received driving fault and overcurrent fault; the data processing module analyzes and processes all data, including data transmitted by the DSP module through EMIF, data received by GPIO, data and fault data sent by GPIO and the like; the PWM generating module is used for generating a PWM signal for controlling the IGBT module.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A multi-module cascade type power grid simulator control system comprises a data signal input end and is characterized in that: the signal input end is electrically connected with a DSP module, the DSP is electrically connected with three FPGA modules, the three FPGA modules are electrically connected with an optical/electrical conversion module, the optical/electrical conversion module is electrically connected with a power module on a main loop of a network simulator, and a level conversion plate is electrically connected between the optical/electrical conversion module and the FPGA module;
the signal input end is used for acquiring and inputting digital signals and analog signals, maintaining the accuracy and stability of data information and realizing the acquisition of the data information at any time;
the DSP module is used for realizing acquisition and processing of data information and operation of a control algorithm, and the DSP module realizes control and adjustment of a system;
the FPGA module is used for calculating and outputting PWM driving signals through PWM duty ratio data, blocking the output of the PWM signals and transmitting fault signals to the DSP module through a communication bus;
the optical/electrical conversion module is used for eliminating strong electromagnetic interference when the high-power electronic equipment runs, reducing the influence of the interference on a control system, converting the PWM driving signal into an optical signal from an electrical signal and then transmitting the optical signal to the IGBT power module.
2. The multi-module cascaded grid simulator control system of claim 1, wherein: the DSP module and the FPGA modules form a PWM driving control system, and the DSP module transmits PWM duty ratio data to the FPGA modules through a data bus.
3. The multi-module cascaded grid simulator control system of claim 2, wherein: the number of the FPGA modules in the PWM driving control system is increased or reduced according to the number of the PWM signals actually used, EMIF communication is adopted between the DSP module and the FPGA module, and the number of the FPGA chips is flexibly expanded through the EMIF communication.
4. The multi-module cascaded grid simulator control system of claim 1, wherein: the DSP module and the three FPGA modules form a module cascade type three-phase power grid simulator, and the three FPGA modules respectively control and detect IGBT modules of an A phase, a B phase and a C phase of equipment.
5. The multi-module cascaded grid simulator control system of claim 1, wherein: the AD module in the DSP module is an analog signal sampling module and is used for detecting analog data of voltage, current and temperature of equipment operation; the communication module in the DSP module is used for communicating with the upper computer, sending data to the upper computer and receiving a control instruction sent by the upper computer; the GPIO module in the DSP module is used for detecting and controlling digital signals; the data processing module in the DSP module is a core unit of the DSP module and is used for analyzing and processing all data, including AD sampling data processing, external digital signal detection data processing, fault signal detection processing, communication data processing and control algorithm realization; and the EMIF module in the DSP module is used for communicating with the FPGA module and transmitting PWM duty ratio data and fault signals.
6. The multi-module cascaded grid simulator control system of claim 1, wherein: the GPIO module in the FPGA module is used for transmitting digital signals with the DSP module and comprises a device start-stop signal and a quick fault signal, the EMIF module in the FPGA module is used for communicating with the DSP module, and the fault processing module in the FPGA module is used for processing received driving faults and overcurrent faults; the data processing module in the FPGA module analyzes and processes all data, including data transmitted by the EMIF module between the FPGA module and the DSP module, data received by the GPIO module, data sent by the GPIO module and fault data; and the PWM generating module in the FPGA module is used for generating a PWM signal for controlling the IGBT module.
7. The multi-module cascaded grid simulator control system of claim 1, wherein: the digital signal level received by the FPGA module is 3.3V, the PWM signal and the fault signal need to be subjected to level conversion, the level conversion plate realizes that the digital signal level is converted from 3.3V to 5V or from 5V to 3.3V, and the driving capability of the signal is increased.
8. The multi-module cascaded grid simulator control system of claim 1, wherein: the optical/electrical conversion module converts electrical signals into optical signals and optical signals into electrical signals, the optical signals are not subjected to electromagnetic interference during long-distance transmission, and one power module is electrically connected with one optical/electrical conversion module.
9. The multi-module cascaded grid simulator control system of claim 1, wherein: the power module adopts a three-phase H bridge or a single-phase H bridge formed by IGBT modules.
10. The multi-module cascaded grid simulator control system of claim 4, wherein: the phase A, the phase B and the phase C are respectively and electrically connected with ten optical/electrical conversion modules, and the ten optical/electrical conversion modules are respectively and independently connected with one power module.
CN202210796510.9A 2022-07-06 2022-07-06 Multi-module cascade type power grid simulator control system Pending CN115047786A (en)

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CN202210796510.9A CN115047786A (en) 2022-07-06 2022-07-06 Multi-module cascade type power grid simulator control system

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CN202210796510.9A CN115047786A (en) 2022-07-06 2022-07-06 Multi-module cascade type power grid simulator control system

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