CN102403734B - Method and device for embedded photovoltaic grid connected inversion based on multi-processor - Google Patents
Method and device for embedded photovoltaic grid connected inversion based on multi-processor Download PDFInfo
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- CN102403734B CN102403734B CN201110363399.6A CN201110363399A CN102403734B CN 102403734 B CN102403734 B CN 102403734B CN 201110363399 A CN201110363399 A CN 201110363399A CN 102403734 B CN102403734 B CN 102403734B
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Abstract
The invention, suitable for the technical field of solar energy, provides a method and device for embedded photovoltaic grid connected inversion based on a multi-processor. The method comprises the following steps of: realizing DSP (Digital Signal Processor) control logic conversion through a CPLD (Complex Programmable Logic Device), and acquiring an electric state of a photovoltaic grid connected inverter in real time through a DSP processing chip; judging whether to meet the grid connected condition according to the electric state; and if a system is in operation, loading corresponding grid connected control step which is of carrying out real-time data communication and command interaction between the DSP processing chip and an ARM (Advanced Risc Machine) by serial ports and performing operation state switching detection and corresponding function processing logic of the photovoltaic grid connected inverter by the DSP. Compared with the existing inverter processer structure, such processing mechanism is greatly improved in system functionality, real-time property, expandability and easy system upgradability.
Description
Technical field
The invention belongs to technical field of solar, relate in particular to a kind of method and device based on multiprocessor embedded photovoltaic grid connected inversion.
Background technology
Along with photovoltaic plant function is become stronger day by day, more and more urgent to the Improvement requirement of memory data output, data transmission bauds and data transfer mode, the functional and requirement of real-time of the processor that photovoltaic combining inverter is adopted is more and more higher.
What in photovoltaic combining inverter, adopt at present, is single dsp processor or other single-chip microcomputer.Owing to adopting single processor, its hardware resource is limited, and the real-time touch that can not meet the many look & feels based on operating system shows, can not meet remote data communication and the functional requirements such as real-time response to communication command of network and GPRS.Therefore, existing photovoltaic combining inverter adopts the mode of single-processor or other single-chip microcomputers to exist function more single, and real-time is poor, and autgmentability is poor, the more difficult problem of upgrading.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the embodiment of the present invention is to provide a kind of method based on multiprocessor embedded photovoltaic grid connected inversion, has improved functional, real-time and the extensibility of photovoltaic parallel in system.
The embodiment of the present invention is achieved in that a kind of method based on multiprocessor embedded photovoltaic grid connected inversion, said method comprising the steps of:
DSP process chip Real-time Collection photovoltaic combining inverter electric state;
According to described electric state, judge whether to meet grid-connected condition;
If system is in running status, load corresponding grid-connected control step, described grid-connected control step be DSP carry out photovoltaic combining inverter running status change detection and enter running status handling process and DSP process chip and ARM between by serial ports, carry out real-time data communication and command interaction, wherein, between DSP process chip and ARM, by serial ports, carry out real-time data communication and command interaction specifically comprises: photovoltaic combining inverter running state information is preserved with touch-screen and shown in real time, the touch-screen order of ARM interrupt response is also carried out command interaction with DSP process chip.
Further, described method also comprises:
During inversion system operation, closed AC and DC side circuit breaker;
System enters state in startup, carries out System self-test and initialization;
Detect and whether meet the condition that is incorporated into the power networks;
If meet grid-connected condition, enter running status handling process, and detect in real time invertor operation state in DSP, touch-screen output command or whether have artificial cut-out circuit breaker phenomenon, carry out corresponding state switching, and enter corresponding handling process.
Further, described in, entering running status handling process comprises:
Detect in DSP and record inverter operating state;
If in running status, if start is operation first, upgrade various parameter settings in DSP, dsp processor starts collection, protection and grid-connected control algolithm, create sub-thread 1 and realize ARM and DSP communication, show in real time invertor operation information and command interaction, and, create sub-thread 2 and realize by network interface/RS485/GPRS and remote monitoring end communication function, respond interruptive command and the parameter modification setting of touch-screen simultaneously;
If malfunction, starting protection program, cuts off A.C. contactor, preserves fault message, carries out fault alarm indication, and constantly whether detection system fault is removed and whether have power-on command, according to testing result, carries out state switching;
If holding state, whether cycle detection inversion system meets grid-connected condition, if meet, carries out state switching;
If stopped status, disconnects A.C. contactor, whether cycle detection system meets entry condition, if meet the state in startup that enters.
It is a kind of based on multiprocessor embedded photovoltaic grid connected inversion device that another embodiment of the present invention is to provide, and described device comprises signal isolation and the disposable plates that is built-in with DSP process chip, and, be built-in with data monitoring, communication and the display panel of ARM chip,
DSP process chip Real-time Collection photovoltaic combining inverter electric state, and judge whether to meet grid-connected condition according to described electric state; If system is in running status, load corresponding grid-connected control step, described grid-connected control step be DSP process chip carry out photovoltaic combining inverter running status change detection and enter running status handling process and DSP process chip and ARM chip between by serial ports, carry out real-time data communication and command interaction
Wherein, between DSP process chip and ARM chip, by serial ports, carry out real-time data communication and command interaction specifically comprises: photovoltaic combining inverter running state information is preserved with touch-screen and shown in real time, ARM chip interrupt response touch-screen order is also carried out command interaction with DSP process chip.
In an embodiment of the present invention, set up multiprocessor synchronous operation and Coordination Treatment operating mechanism, each processor real-time of making overall plans, improves whole inversion system disposal ability.Compare and existing inverter processor structure, this treatment mechanism is improving a lot aspect the easy upgradability of system functionality, real-time, extensibility and system.
Accompanying drawing explanation
Fig. 1 is the basic block diagram of the photovoltaic combining inverter that provides of the embodiment of the present invention;
Fig. 2 is the flow chart based on multiprocessor embedded photovoltaic grid connected inversion implementation method that the embodiment of the present invention provides;
Fig. 3 is the process chart of the multiprocessor that provides of the embodiment of the present invention under inverter different operating state.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the basic structure of the photovoltaic combining inverter that the embodiment of the present invention provides, and in direct-flow input end, ac output end and the net side of this photovoltaic combining inverter, voltage and current sensor is all installed.This photovoltaic combining inverter comprises: DC circuit breaker, electric capacity battle array, three-phase full-bridge inverter, filter, three-phase transformer, A.C. contactor, AC circuit breaker, DC side signal sampling, the sampling of inverter output signal, net side signal sampling, signal isolation and disposable plates, data monitoring communicative indication plate and touch-screen.
Integrated DSP process chip and CPLD logic chip in described signal isolation and disposable plates.
Electric state by DSP process chip Real-time Collection photovoltaic combining inverter, judges whether to meet grid-connected condition, if system in running status, loads corresponding grid-connected control algolithm.By CPLD chip, realize DSP process chip control logic and change, DSP realizes invertor operation state change detection and enters running status handling process, between DSP process chip and ARM, by serial ports, carries out real-time data communication and command interaction.Wherein, comprise the running state information preservation of photovoltaic combining inverter and the real-time demonstration of touch-screen, the touch-screen order of ARM interrupt response is also carried out command interaction with DSP process chip.
Fig. 2 shows the flow process based on multiprocessor embedded photovoltaic grid connected inversion implementation method, and details are as follows:
In step S101, during inversion system operation, first closed AC and DC side circuit breaker.
In step S102, system enters state in startup, carries out System self-test and initialization.
In step S103, detect and whether meet the condition that is incorporated into the power networks.If meet, perform step S104, otherwise repeatedly perform step S103, repeatedly detect.
In step S104, be incorporated into the power networks, and detection system state.
When the condition of being incorporated into the power networks meets, enter running status handling process.Detection system state is specially: DSP process chip detects the on off operating mode of running status, touch-screen output command or the circuit breaker of photovoltaic combining inverter in real time.
In step S105, judge whether to carry out state switching.If desired perform step S106, otherwise finish this flow process.
In step S106, according to corresponding instruction, carry out corresponding state switching, enter corresponding handling process.
Fig. 3 shows multiprocessor that the embodiment of the present invention the provides handling process under inverter different operating state, and details are as follows:
Arm processor arranges main thread and two sub-threads.
In step S301, detect the operating state of the photovoltaic combining inverter recording in dsp processor.Photovoltaic combining inverter operating state is divided into running status, malfunction, holding state and stopped status.When for running status, perform step S3011, when being malfunction, execution step S3021, when being holding state, performs step S3031, when being stopped status, and execution step S3041.
In step S3011, when for start operation first, upgrade various parameter settings in DSP process chip.
In step S3012, DSP process chip starts collection, protection and grid-connected control algolithm.
In step S3013, create sub-thread 1, to realize ARM and DSP communication, show in real time invertor operation information and command interaction.
In step S3014, create sub-thread 2, to realize by network interface/RS485/GPRS and remote monitoring end communication function.
In step S3015, interruptive command and the parameter modification setting of response touch-screen.
In step S3016, detect and whether have DSP state variation or touch-screen output command or artificially cut off circuit breaker, judge whether invertor operation state switches.In step S3021, if malfunction, starting protection program, cuts off A.C. contactor.
In step S3022, preserve fault message.
In step S3023, carry out fault alarm indication.
In step S3024, constantly whether detection system fault is removed.According to testing result, carry out state switching.
In step S3025, constantly whether detection there is power-on command.According to testing result, carry out state switching.
In step S3031, if holding state, whether cycle detection inversion system meets grid-connected condition.If meet, jump to execution step S302.
In step S3041, if stopped status disconnects A.C. contactor.
In step S3042, whether cycle detection system meets entry condition.
In step S3043, if meet the state in startup that enters.
In step S302, carry out state switching.
In an embodiment of the present invention, set up multiprocessor synchronous operation and Coordination Treatment operating mechanism, each processor real-time of making overall plans, improves whole inversion system disposal ability.Compare and existing inverter processor structure, this treatment mechanism improves a lot in performance aspect the easy upgradability of system functionality, real-time, extensibility and system.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the method based on multiprocessor embedded photovoltaic grid connected inversion, is characterized in that, said method comprising the steps of:
DSP process chip Real-time Collection photovoltaic combining inverter electric state;
According to described electric state, judge whether to meet grid-connected condition;
If system is in running status, load corresponding grid-connected control step, described grid-connected control step be DSP process chip carry out photovoltaic combining inverter running status change detection and enter running status handling process and DSP process chip and ARM chip between by serial ports, carry out real-time data communication and command interaction
Wherein, between DSP process chip and ARM chip, by serial ports, carry out real-time data communication and command interaction specifically comprises: photovoltaic combining inverter running state information is preserved with touch-screen and shown in real time, ARM chip interrupt response touch-screen order is also carried out command interaction with DSP process chip.
2. the method based on multiprocessor embedded photovoltaic grid connected inversion according to claim 1, is characterized in that, described method also comprises:
During inversion system operation, closed AC and DC side circuit breaker;
System enters state in startup, carries out System self-test and initialization;
Detect and whether meet the condition that is incorporated into the power networks;
If meet grid-connected condition, enter running status handling process, and detect in real time invertor operation state in DSP, touch-screen output command or whether have artificial cut-out circuit breaker phenomenon, carry out corresponding state switching, and enter corresponding handling process.
3. the method based on multiprocessor embedded photovoltaic grid connected inversion according to claim 2, is characterized in that, described in enter running status handling process and comprise:
Detect in DSP and record inverter operating state;
If in running status, if start is operation first, upgrade various parameter settings in DSP, dsp processor starts collection, protection and grid-connected control algolithm, create sub-thread 1 and realize ARM and DSP communication, show in real time invertor operation information and command interaction, and, create sub-thread 2 and realize by network interface/RS485/GPRS and remote monitoring end communication function, respond interruptive command and the parameter modification setting of touch-screen simultaneously;
If malfunction, starting protection program, cuts off A.C. contactor, preserves fault message, carries out fault alarm indication, and constantly whether detection system fault is removed and whether have power-on command, according to testing result, carries out state switching;
If holding state, whether cycle detection inversion system meets grid-connected condition, if meet, carries out state switching;
If stopped status, disconnects A.C. contactor, whether cycle detection system meets entry condition, if meet the state in startup that enters.
4. one kind based on multiprocessor embedded photovoltaic grid connected inversion device, it is characterized in that, described device comprises signal isolation and the disposable plates that is built-in with DSP process chip, and, be built-in with data monitoring, communication and the display panel of ARM chip, DSP process chip Real-time Collection photovoltaic combining inverter electric state, and judge whether to meet grid-connected condition according to described electric state, if system is in running status, load corresponding grid-connected control step, described grid-connected control step be DSP process chip carry out photovoltaic combining inverter running status change detection and enter running status handling process and DSP process chip and ARM chip between by serial ports, carry out real-time data communication and command interaction, wherein, between DSP process chip and ARM chip, by serial ports, carry out real-time data communication and command interaction specifically comprises: photovoltaic combining inverter running state information is preserved with touch-screen and shown in real time, the response touch-screen order of ARM chip interrupt is also carried out command interaction with DSP process chip.
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| CN102735978B (en) * | 2012-07-13 | 2014-10-29 | 云南北方光电仪器有限公司 | Computer on-line debugging method for grid-connected inverter |
| CN117318173B (en) * | 2023-09-27 | 2024-06-28 | 南方电网数字电网研究院股份有限公司 | Multi-core heterogeneous chip applied to high-power cascading inverter |
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| JPH10229679A (en) * | 1997-02-18 | 1998-08-25 | Mitsubishi Electric Corp | Inverter device linked to system |
| CN201837674U (en) * | 2010-09-17 | 2011-05-18 | 余杭供电局 | Grid-connected photovoltaic power generation monitoring and analysis system |
| CN201985548U (en) * | 2011-03-30 | 2011-09-21 | 华南理工大学 | Solar photovoltaic inverting generation system |
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