CN104682413A - System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture - Google Patents
System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture Download PDFInfo
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- CN104682413A CN104682413A CN201310611837.5A CN201310611837A CN104682413A CN 104682413 A CN104682413 A CN 104682413A CN 201310611837 A CN201310611837 A CN 201310611837A CN 104682413 A CN104682413 A CN 104682413A
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- master controller
- photovoltaic
- converter
- counterflow
- control system
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000002411 adverse Effects 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract 3
- 230000005611 electricity Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H02J3/383—
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention relates to a system and a method for anti-countercurrent control based on an ARM (advanced RISC (reduced instruction set computer) machine) architecture. The system comprises a main controller, a relay, an alternating current contactor, a voltage collecting module, a current sampling sensor, a power supply source module, a touch screen and a PC (personal computer), wherein the main controller adopts the ARM architecture, the relay, the alternating current contactor, the voltage collecting module, the current sampling sensor, the power supply source module, the touch screen and the PC are respectively connected with the main controller, an air switch is arranged between a photovoltaic inverter and a power grid side, one end of the voltage collecting module is connected with the air switch, the other end of the voltage collecting module is connected with one end of the alternating current contactor, the other end of the alternating current contactor is connected with the photovoltaic inverter, the main controller is used for controlling the alternating current contactor through the relay, and an A/D (analog to digital) data collecting module is arranged on the main controller, and is respectively connected with the voltage collecting module and the current sampling sensor. Compared with the prior art, the system has the advantages that the output power of the inverter can be quickly adjusted, and the reverse power is timely prevented; when a communication fault is detected by the main controller, the main controller is used for disconnecting the alternating current contactor, so as to solve the problem that the corresponding control cannot be performed in the countercurrent occurring process.
Description
Technical field
The present invention relates to solar photovoltaic grid-connection field, especially relate to a kind of counterflow-preventing control system based on ARM framework and method.
Background technology
For the grid-connected photovoltaic system of low-voltage network side, it is generally acknowledged that photovoltaic generation power is not more than 20% of grid-connected side higher level's distribution transformer capacity.At present, Utilities Electric Co. requires that photovoltaic parallel in system is irreversible electricity generation system usually, and namely photovoltaic parallel in system electricity is consumed by local load, and unnecessary electricity does not allow by the reverse conveying of low voltage distribution transformer superior electrical network.
In grid-connected system, because external environment condition is constantly change, in order to the utilance preventing the reverse generating of photovoltaic parallel in system from improving photovoltaic parallel in system electricity simultaneously, system needs to configure a set of counterflow-preventing control system, regulated the generated output of photovoltaic generating system by the voltage of Real-Time Monitoring distribution transformer low tension outlet side, current signal, thus reach the counterflow-preventing function of photovoltaic parallel in system and improve the utilance of photovoltaic DC-to-AC converter generating.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of counterflow-preventing control system based on ARM framework and method are provided.
Object of the present invention can be achieved through the following technical solutions: a kind of counterflow-preventing control system based on ARM framework, be connected with photovoltaic DC-to-AC converter and grid side respectively, described photovoltaic DC-to-AC converter and the line of grid side are connected with local load, it is characterized in that, this control system comprises the master controller adopting ARM framework, and the relay be connected with master controller respectively, A.C. contactor, voltage acquisition module, current sample transducer, power supply module, touch-screen and PC, air switch is provided with between described photovoltaic DC-to-AC converter and grid side, described voltage acquisition module one end is connected with air switch, the other end is connected with A.C. contactor, the described A.C. contactor other end is connected with photovoltaic DC-to-AC converter, described master controller is by Control A.C. contactor, described master controller is provided with A/D data acquisition module, described A/D data acquisition module is connected with voltage acquisition module and current sample transducer respectively.
Described photovoltaic DC-to-AC converter is provided with multiple, described photovoltaic DC-to-AC converter, A.C. contactor and relay one_to_one corresponding.
Described photovoltaic DC-to-AC converter is no more than 10.
Described master controller is by RS485 or Ethernet and photovoltaic DC-to-AC converter communication.
Described master controller is by RS485 or Ethernet and PC communication.
Described master controller is by RS232 and touch-screen communication.
Described power supply module comprises+12V relay power, ± 12V current sensor power supply ,+24V touch-screen power supply and+5V power supply.
Described master controller also comprises memory, is used for the historical data of saved system.
Described counterflow-preventing set-up of control system is in control cubicle.
A kind of Countercurrent prevention control method, is characterized in that, the A/D data acquisition module of described master controller obtains the voltage of voltage acquisition module collection, obtains the electric current that current sample transducer gathers, obtains the electrical network power scale Pt surveyed; Master controller judges whether grid side power P t is greater than the default control power P s of master controller, that photovoltaic DC-to-AC converter puts into operation by master controller gradually, otherwise A.C. contactor is disconnected by control relay by master controller gradually, then inverter is disconnected gradually, reduce inverter output power, until all inverter cuts out; When inverse probability appears in system, judging that inverse probability occurs the duration whether in the duration ranges preset, is ignore, and continues normally to run; Otherwise inverter disconnects by master controller within the time limited, if still there is adverse current disconnect inverter within the time limited after, then direct closed relay; When there is communication failure, master controller directly cuts out the A.C. contactor being connected to photovoltaic DC-to-AC converter, prevents the generation of adverse current.
Compared with prior art, the present invention has the following advantages:
1, while preventing adverse current, the power output of energy quick adjustment inverter, prevents the appearance of inverse probability in time.
2, there is good human-computer interaction interface, provide higher security performance, anti-harsh weather performance and resistance to wear.
3, when master controller detects communication failure, the A.C. contactor controlling to export directly disconnects by master controller, stops powering to grid side, stops cannot control accordingly when there is adverse current.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, a kind of counterflow-preventing control system based on ARM framework, be arranged in control cubicle, be connected with photovoltaic DC-to-AC converter 1 and grid side 2 respectively, described photovoltaic DC-to-AC converter 1 and the line of grid side 2 are connected with local load 3, it is characterized in that, this control system comprises the master controller MCU adopting ARM framework, and the relay 4 be connected with master controller MCU respectively, A.C. contactor 5, voltage acquisition module 6, current sample transducer 7, power supply module, touch-screen 9 and PC 10, described master controller adopts ARMCortex-M3 chip, air switch 11 is provided with between described photovoltaic DC-to-AC converter 1 and grid side 2, described voltage acquisition module 6 one end is connected with air switch 11, the other end is connected with A.C. contactor 5, described A.C. contactor 5 other end is connected with photovoltaic DC-to-AC converter 1, described master controller MCU controls A.C. contactor 5 by relay 4, described master controller MCU is provided with A/D data acquisition module, described A/D data acquisition module is connected with voltage acquisition module 6 and current sample transducer 7 respectively.Described photovoltaic DC-to-AC converter 1 is provided with multiple, described photovoltaic DC-to-AC converter 1, A.C. contactor 5 and relay 4 one_to_one corresponding.Described photovoltaic DC-to-AC converter 1 is no more than 10.Described master controller MCU is by RS485 or Ethernet and photovoltaic DC-to-AC converter 1 communication.Described master controller MCU is by RS485 or Ethernet and PC 10 communication.Described master controller MCU is by RS232 and touch-screen 9 communication.Described power supply module comprises+12V relay power 81, ± 12V current sensor power supply 82 ,+24V touch-screen power supply 83 and+5V power supply 84.Described master controller MCU also comprises memory, is used for the historical data of saved system.
A kind of Countercurrent prevention control method, is characterized in that, the A/D data acquisition module of described master controller obtains the voltage of voltage acquisition module collection, obtains the electric current that current sample transducer gathers, obtains the electrical network power scale Pt surveyed; Master controller judges whether grid side power P t is greater than the default control power P s of master controller, that photovoltaic DC-to-AC converter puts into operation by master controller gradually, otherwise A.C. contactor is disconnected by control relay by master controller gradually, then inverter is disconnected gradually, reduce inverter output power, until all inverter cuts out; When inverse probability appears in system, judging that inverse probability occurs the duration whether in the duration ranges preset, is ignore, and continues normally to run; Otherwise inverter disconnects by master controller within the time limited, if still there is adverse current disconnect inverter within the time limited after, then direct closed relay; When there is communication failure, master controller directly cuts out the A.C. contactor being connected to photovoltaic DC-to-AC converter, prevents the generation of adverse current.
Claims (10)
1. the counterflow-preventing control system based on ARM framework, be connected with photovoltaic DC-to-AC converter and grid side respectively, described photovoltaic DC-to-AC converter and the line of grid side are connected with local load, it is characterized in that, this control system comprises the master controller adopting ARM framework, and the relay be connected with master controller respectively, A.C. contactor, voltage acquisition module, current sample transducer, power supply module, touch-screen and PC, air switch is provided with between described photovoltaic DC-to-AC converter and grid side, described voltage acquisition module one end is connected with air switch, the other end is connected with A.C. contactor, the described A.C. contactor other end is connected with photovoltaic DC-to-AC converter, described master controller is by Control A.C. contactor, described master controller is provided with A/D data acquisition module, described A/D data acquisition module is connected with voltage acquisition module and current sample transducer respectively.
2. a kind of counterflow-preventing control system based on ARM framework according to claim 1, it is characterized in that, described photovoltaic DC-to-AC converter is provided with multiple, described photovoltaic DC-to-AC converter, A.C. contactor and relay one_to_one corresponding.
3. a kind of counterflow-preventing control system based on ARM framework according to claim 1, it is characterized in that, described photovoltaic DC-to-AC converter is no more than 10.
4. a kind of counterflow-preventing control system based on ARM framework according to claim 1, is characterized in that, described master controller is by RS485 or Ethernet and photovoltaic DC-to-AC converter communication.
5. a kind of counterflow-preventing control system based on ARM framework according to claim 1, is characterized in that, described master controller is by RS485 or Ethernet and PC communication.
6. a kind of counterflow-preventing control system based on ARM framework according to claim 1, it is characterized in that, described master controller is by RS232 and touch-screen communication.
7. a kind of counterflow-preventing control system based on ARM framework according to claim 1, is characterized in that, described power supply module comprises+12V relay power, ± 12V current sensor power supply ,+24V touch-screen power supply and+5V power supply.
8. a kind of counterflow-preventing control system based on ARM framework according to claim 1, it is characterized in that, described master controller also comprises memory, is used for the historical data of saved system.
9. a kind of counterflow-preventing control system based on ARM framework according to claim 1, it is characterized in that, described counterflow-preventing set-up of control system is in control cubicle.
10. the Countercurrent prevention control method based on system according to claim 1, it is characterized in that, the A/D data acquisition module of described master controller obtains the voltage of voltage acquisition module collection, obtains the electric current that current sample transducer gathers, obtains the electrical network power scale Pt surveyed; Master controller judges whether grid side power P t is greater than the default control power P s of master controller, that photovoltaic DC-to-AC converter puts into operation by master controller gradually, otherwise A.C. contactor is disconnected by control relay by master controller gradually, then inverter is disconnected gradually, reduce inverter output power, until all inverter cuts out; When inverse probability appears in system, judging that inverse probability occurs the duration whether in the duration ranges preset, is ignore, and continues normally to run; Otherwise inverter disconnects by master controller within the time limited, if still there is adverse current disconnect inverter within the time limited after, then direct closed relay; When there is communication failure, master controller directly cuts out the air switch being connected to grid side, prevents the generation of adverse current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611837.5A CN104682413A (en) | 2013-11-26 | 2013-11-26 | System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611837.5A CN104682413A (en) | 2013-11-26 | 2013-11-26 | System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture |
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| CN104682413A true CN104682413A (en) | 2015-06-03 |
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| CN201310611837.5A Pending CN104682413A (en) | 2013-11-26 | 2013-11-26 | System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253331A (en) * | 2016-08-18 | 2016-12-21 | 宁波锦浪新能源科技股份有限公司 | anti-reflux controller |
| CN109088430A (en) * | 2018-08-17 | 2018-12-25 | 常州思瑞电力科技有限公司 | Energy-storage system counterflow-preventing protects power supply system and its investigating method |
-
2013
- 2013-11-26 CN CN201310611837.5A patent/CN104682413A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253331A (en) * | 2016-08-18 | 2016-12-21 | 宁波锦浪新能源科技股份有限公司 | anti-reflux controller |
| CN109088430A (en) * | 2018-08-17 | 2018-12-25 | 常州思瑞电力科技有限公司 | Energy-storage system counterflow-preventing protects power supply system and its investigating method |
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Application publication date: 20150603 |