CN105515496A - Photovoltaic diesel oil complementary type micro power grid system based on PLC - Google Patents
Photovoltaic diesel oil complementary type micro power grid system based on PLC Download PDFInfo
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- CN105515496A CN105515496A CN201510912882.3A CN201510912882A CN105515496A CN 105515496 A CN105515496 A CN 105515496A CN 201510912882 A CN201510912882 A CN 201510912882A CN 105515496 A CN105515496 A CN 105515496A
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- 239000002283 diesel fuel Substances 0.000 title claims abstract description 18
- 230000000295 complement effect Effects 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000004146 energy storage Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000295 fuel oil Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to the technical field of an industrial application of a photovoltaic micro power grid, and especially relates to a photovoltaic diesel oil complementary type micro power grid system based on a PLC. Output three phases of a photovoltaic inverter, output three phases of a diesel generator and a load are connected in parallel with an AC bus respectively through electric control switches, a communication control module of the PLC is respectively connected with the control ends of the photovoltaic inverter, the diesel generator and the load, and input and output interface ends of the PLC are connected with the control ends of the three electric control switches. According to the photovoltaic diesel oil complementary type micro power grid system based on the PLC, photovoltaic-diesel oil generating conversion is controlled through the PLC, power output of the diesel generator is effectively reduced, the effects of reducing fuel oil consumption and reducing carbon emission are realized, and the system provided by the invention has the advantages of high anti-interference capability, accurate regulation and control, reliable operation and good versatility.
Description
Technical field
The present invention relates to the commercial Application technical field of photovoltaic micro, particularly relate to a kind of photovoltaic diesel oil complementary type micro-grid system based on PLC.
Background technology
Effectively can solve remote districts from net type micro-capacitance sensor, as the powerup issue in the area such as island, remote mountain areas, it plays an important role improving in this type of regional quality of the life.In recent years, Chinese scholars has carried out a series of research around self micro-capacitance sensor, wherein the optimal control of self micro-capacitance sensor is the matter of utmost importance needing in the design of self micro-capacitance sensor to solve, and is realize one of particularly important factor of whole micro-grid system maximizing the benefits.
At present, the area that island and mine etc. are more remote from bulk power grid and power supply capacity is weak, its load power consumption is larger, and limit due to the transmission path of bulk power grid, the supply of its main power source mainly takes Diesel engine as power source, be supplied to the electric energy required for field load with the diesel oil of the combusts fossil energy, CO2 and sulfide gas that simultaneously also can be a large amount of be discharged in air, cause air environmental pollution.
For most country, the cost of current diesel oil is generally the often liter of 1-1.5 dollar cost of every kilowatt hour oil-fired power generating (will more than 0.30 dollar), and the cost of solar energy photovoltaic system generating is generally about 10-15 cent/kilowatt hour.
And day by day raise along with the conversion efficiency of current crystalline silicon photovoltaic solar panel, the conversion efficiency of current crystal silicon solar energy battery plate is generally more than 18%, according to photovoltaic module useful life of 20 years, the often degree electricity cost of photovoltaic generation is also progressively declining.But photovoltaic generation also has its 2 limitation.One, for photovoltaic power station power generation capacity is unstable, along with radiometric power of sunlight changes greatly, night, photovoltaic plant did not generate electricity; Its two, the initial investment cost of photovoltaic module is higher, and infield is restricted, and the construction cost of photovoltaic plant is at 7 yuan every kilowatt in the market.
Described on total, combined reliability and economy aspect are considered.The power supply of the remote districts such as island or mine can adopt the strategy of diesel engine generator and photovoltaic generation Hybrid mode, in order to the raising of power supply quality, also can add suitable energy storaging product in hybrid system, as the pressurizer of hybrid power system.And the stable operation of the mixed power supply system of this cover diesel engine generator+photovoltaic will be ensured, adapt to the loading demand of constantly change since needing the reliable intelligent controller of a set of perfect in shape and function to detect and coordinate the power-balance of photovoltaic and diesel engine generator.
General micro-capacitance sensor electricity generation system all needs to develop a set of SCADA supervisory control system in addition.SCADA supervisory control system increases data communication and collector often in the electricity generation system of micro-capacitance sensor, and separately needs independently server as the storage of data and Presentation Function.The cost of common SCADA supervisory control system up to tens thousand of to hundreds of thousands unit not etc.
At present, SMA company also once developed the photovoltaic-diesel engine generator hybrid control system of similar saving fuel oil.This product can make diesel engine generator carry out mixed power generation by solar components, and this hybrid generation mode perhaps will drive the decline of cost of electricity-generating from far-off regions.But this product is the controller of core based on DSP arithmetic element, and antijamming capability is limited, and controller also can only carry out communication (inverter, collector etc.) with the product of SMA series, and versatility is not strong.
Summary of the invention
For the defect that prior art exists, the invention provides a kind of antijamming capability strong, regulate and control accurate, reliable, versatility good be widely used in island, the photovoltaic diesel oil complementary type micro-grid system based on PLC in the remote unregulated power supply such as mine or desert or the weak area of supply of electric power.
For achieving the above object, the present invention adopts following technical scheme:
A kind of photovoltaic diesel oil complementary type micro-grid system based on PLC, the output three-phase of photovoltaic DC-to-AC converter, the output three-phase of diesel engine generator and load are parallel to ac bus respectively by a road electric-controlled switch, the communication control module of PLC connects the control end of photovoltaic DC-to-AC converter, diesel engine generator and load respectively, and the input/output interface end of PLC is connected to several electric-controlled switch control end.The core of control section is made up of a PLC, and PLC is by the MODUBUS communication interface that carries and photovoltaic DC-to-AC converter, and data interaction is carried out in diesel engine generator control end and load.Like this, PLC can receive real-time data communication information to monitor the operation of whole system simultaneously.In whole control system, following several controlling functions can be realized:
1) active power and Reactive Power Control (P-Q control).By regulating the phase angle difference of combining inverter voltage and network voltage to control active power, control reactive power by regulating the voltage magnitude of combining inverter;
2) quick load is followed the tracks of and energy storage.In micro-capacitance sensor, the inertia of generator is less, and the response time of power supply is very long again, when micro-capacitance sensor becomes islet operation with major network off-the-line, provides energy storage device could maintain the normal operation of micro-capacitance sensor.
3) frequency adjusts difference to control.When micro-capacitance sensor becomes islet operation, frequency be taked to adjust difference to control, change the ratio that diesel generating set and photovoltaic DC-to-AC converter bear load, make each unit output in adjustment according to a certain percentage and do not exceed standard.
Like this by utilizing solar power generation electricity power, effectively reduced the power stage of diesel engine generator by reliable Energy Transfer, thus play the effect of saving fuel consume and reducing carbon emission.
As preferably, also comprise the two-way inverter of energy storage, the two-way inverter of energy storage is parallel to ac bus by a circuit breaker, and the communication control module of PLC connects the control end of the two-way inverter of energy storage, and the control end of circuit breaker is connected to the input/output interface end of PLC.The two-way inverter one end of energy storage connects battery pack, can store when photovoltaic generation is had more than needed, and is reverse into high-tension electricity and exports for subsequent use, add Modulatory character and the stability of whole system when needing.
As preferably, comprise one and control electric cabinet, control electric cabinet front and arrange touch-screen, the man-machine interface end of PLC is connected to touch-screen, touch-screen also has optimum configurations and amendment interface.Touch-screen can show dynamic change and the service data of each generating equipment and load in real time, when system alarm time, also can show corresponding warning message on interface.The associated control parameters of system, also can carry out manual modification and input on the touchscreen.Touch-screen has the function of the monitoring display SCADA software of whole micro-grid system, plays SCADA supervisory function bit like this, convenient and reliable, simple to operate, and expense, below ten thousand yuan, can save a large amount of installation costs.
As preferably, described PLC comprises some functional blocks and realizes specific controlling functions, and functional block is called secondary program structure tissue block and carried out programming realization.By the logical building block of setting, mutually call by the logical building block of setting and communicate between different functional blocks, and forming global procedures.Structure is clear, and programming operation is strong, is beneficial to and realizes various control strategy.
As preferably, the function that described functional block realizes has startup, from network control system, and cutting-in control, and/from net conversion and control, Non-follow control.There is various functional block control strategy optional, strong operability.
A kind of photovoltaic diesel oil complementary type micro-grid system based on PLC of the present invention, the conversion of photovoltaic diesel generation is controlled by PLC, the power stage of effective reduction diesel engine generator, thus play and save fuel consume and reduce the effect of carbon emission, and have antijamming capability strong, regulate and control accurate, reliable, that versatility is good advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention.
Fig. 2 is embodiment PLC structural representation of the present invention.
Fig. 3 is that embodiment of the present invention controls electric cabinet cabinet face schematic diagram.
Fig. 4 is embodiment software control flow chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1-4, by embodiment, the present invention is described further.
A kind of photovoltaic diesel oil complementary type micro-grid system based on PLC, as shown in accompanying drawing 1,2, the output three-phase of photovoltaic DC-to-AC converter 1, the output three-phase of diesel engine generator 2 and load 3 are parallel to ac bus 6 respectively by a road electric-controlled switch 5, the communication control module 8 of PLC 7 connects the control end of photovoltaic DC-to-AC converter 1, diesel engine generator 2 and load 3 respectively, and the input/output interface end 9 of PLC 7 is connected to the control end of three electric-controlled switchs (the first electric-controlled switch, the second electric-controlled switch, the 3rd electric-controlled switch) 5.
Micro-grid system also comprises the two-way inverter 4 of energy storage, the two-way inverter 4 of energy storage is parallel to ac bus 6 by an electric-controlled switch 5, the communication control module 8 of PLC 7 connects the control end of the two-way inverter 4 of energy storage, and the control end of the 4th electric-controlled switch 5 is connected to the input/output interface end 9 of PLC 7.
Whole system adopts PLC to control as monitoring core.Wherein PLC adopts the trendy S7-1200 Series Controller of Siemens.S7-1200 Series Design is compact, with low cost and have powerful instruction set, and has the function of extensibility and network service flexibly, can meet the demand of different control strategy in micro-capacitance sensor application.
PLC 7 can be divided into three parts to be respectively communication control module 8, man-machine interface 12 and input/output interface end 9, as shown in Figure 2.Communication control module 8 carries out the real time communication of instruction and data by the PRIFNET network of PLC self and the implementation controller of Modbus serial communication module interface and outer net; Man-machine interface 12 part PLC adopts serial ports RS232 or TCP/IP mode and touch-screen 11 to carry out information interaction, also can direct input control parameter instruction from touch-screen the while that user can reading the main display information of micro-capacitance sensor various piece on touch-screen 11; Input/output interface 9 is that the control of PLC performs link, PLC 7 gathers the current parameter value of each execution unit, and according to current input information, by built-in control strategy state recognition is carried out to micro-capacitance sensor and output information to control the on off state of several execution unit.
As shown in Figure 3, micro-grid system also comprises one and controls electric cabinet 10, and control electric cabinet 10 front and arrange touch-screen 11, the man-machine interface end 12 of PLC 7 is connected to touch-screen 11, and on touch-screen, 11 also have optimum configurations and amendment interface.
PLC comprises some functional blocks and realizes specific controlling functions, and functional block is called secondary program structure tissue block and carried out programming realization.The function that functional block realizes has startup, from network control system, and cutting-in control, and/from net conversion and control, Non-follow control.
Whole control program adopts loop control mode, and the flow process shown in accompanying drawing 4 is shown in the operation of PLC 7 control software design circulation.Beginning, initialization detection, system are talked about normally, carry out strategy scheduling, the abnormal then alarm indication of system, strategy is dispatched and is successfully then performed, strategy scheduling is also carried out information gathering and is provided with man-machine interaction, executed then terminates, and does not perform, and proceeds to perform until terminate.
PLC is as the control core of whole photovoltaic diesel oil complementary type micro-grid system, and it has following characteristics, is that the general controller being key control unit by DSP can not be compared: reliability is high, and antijamming capability is strong; Highly versatile, control program is variable, easy to use; Communication interface flexibly, can with the equipment network of various brand and specification; Volume is little, lightweight, low in energy consumption, easy to maintenance.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention, all equivalences done according to the content of the application's the scope of the claims change and modify, and all should be technology category of the present invention.
Claims (5)
1. the photovoltaic diesel oil complementary type micro-grid system based on PLC, it is characterized in that: the output three-phase of photovoltaic DC-to-AC converter, the output three-phase of diesel engine generator and load are parallel to ac bus respectively by an electric-controlled switch, the communication control module of PLC connects the control end of photovoltaic DC-to-AC converter, diesel engine generator and load respectively, and the input/output interface end of PLC is connected to three electric-controlled switch control ends.
2. a kind of photovoltaic diesel oil complementary type micro-grid system based on PLC according to claim 1, it is characterized in that: also comprise the two-way inverter of energy storage, the two-way inverter of energy storage is parallel to ac bus by a road electric-controlled switch, the communication control module of PLC connects the control end of the two-way inverter of energy storage, and the control end of electric-controlled switch is connected to the input/output interface end of PLC.
3. a kind of photovoltaic diesel oil complementary type micro-grid system based on PLC according to claim 1, it is characterized in that: comprise one and control electric cabinet, control electric cabinet front and programmable touch screen is set, the man-machine interface end of PLC is connected to touch-screen, touch-screen also has optimum configurations and amendment interface.
4. a kind of photovoltaic based on PLC according to claim 1-diesel oil complementary type micro-grid system, it is characterized in that: described PLC comprises some functional blocks and realizes specific controlling functions, functional block is called secondary program structure tissue block and is carried out programming realization.
5. a kind of photovoltaic diesel oil complementary type micro-grid system based on PLC according to claim 4, is characterized in that: the function that described functional block realizes has startup, from network control system, and cutting-in control, and/from net conversion and control, Non-follow control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510912882.3A CN105515496A (en) | 2015-12-11 | 2015-12-11 | Photovoltaic diesel oil complementary type micro power grid system based on PLC |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510912882.3A CN105515496A (en) | 2015-12-11 | 2015-12-11 | Photovoltaic diesel oil complementary type micro power grid system based on PLC |
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| CN105515496A true CN105515496A (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871301A (en) * | 2016-05-26 | 2016-08-17 | 江苏苏美达机电科技有限公司 | Power supply system and method |
| CN106253329A (en) * | 2016-08-05 | 2016-12-21 | 武汉索泰能源科技股份有限公司 | A kind of centralized control equipment based on small photovoltaic power generation system |
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| CN103915836A (en) * | 2014-03-07 | 2014-07-09 | 华南理工大学 | Laboratorial intelligent microgrid system based on various distributed power sources |
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2015
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Patent Citations (5)
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| CN2679901Y (en) * | 2003-04-18 | 2005-02-16 | 新疆新能源股份有限公司 | Larege power intelligence optical-net-firewood mutual compensating power station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105871301A (en) * | 2016-05-26 | 2016-08-17 | 江苏苏美达机电科技有限公司 | Power supply system and method |
| CN106253329A (en) * | 2016-08-05 | 2016-12-21 | 武汉索泰能源科技股份有限公司 | A kind of centralized control equipment based on small photovoltaic power generation system |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant after: trina solar Ltd. Address before: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant before: CHANGZHOU TRINA SOLAR ENERGY Co.,Ltd. Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant after: TRINASOLAR Co.,Ltd. Address before: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Applicant before: trina solar Ltd. |
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Application publication date: 20160420 |