CN110212560A - Based on the hot energy storage control device of long-range control photovoltaic power generation common network counterflow-preventing and method - Google Patents
Based on the hot energy storage control device of long-range control photovoltaic power generation common network counterflow-preventing and method Download PDFInfo
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- 230000000151 anti-reflux effect Effects 0.000 description 2
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Classifications
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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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
- 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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Abstract
The present invention relates to one kind based on the hot energy storage control device of long-range control photovoltaic power generation common network counterflow-preventing and method, the control device includes hot energy storage main controller module and the drive module being connected with the controller module, for the touch screen as human-computer interaction display control interface and for the GPRS communication module for checking detection current intelligence of networking, and the H bridge that the IGBT when main control module generates PWM by control CPLD chip in ordered pair drive module is constituted, which is driven, heats output DC current to hot energy storage device.This method shares the micro-grid system of midget plant, domestic consumer's power utilization network using solar energy power generating and alternating current, the occasion fixed used in hot water demand's time, it carries out detecting related electricity, analysis guarantees that no extra electricity is flowed into alternating current under the premise of to greatest extent using solar energy power generating, eliminate the trouble being largely routed, and the hot energy storage device of clean energy resource is heated, to prevent the generation of backward current.
Description
Technical field
The present invention relates to counterflow-preventing control technology fields, anti-based on long-range control photovoltaic power generation common network more particularly, to one kind
Refluent heat energy storage control device and method.
Background technique
Prior art a part is the control circuit control switch circuit being used as by electrical component logic control circuit
On or off come achieve the purpose that control counterflow-preventing；Another part is to monitor net side by the measure and control instrument of voltage and electric current
Current Voltage judge whether there is extra electric energy be sent into the measure that power grid and taking when extra electric energy occurs and enters power grid is remedied with
The generation for preventing adverse current belongs to the mode of post.And it is inconsiderate for online performance, lack network extension function.
Existing anti-reverse Flow Technique is the voltage and current by detecting grid side, once it finds to power grid input current, meeting
Controlling inverter by way of communication immediately reduces output electric current, reduces power, when there are communication failure or other systems
Control contactor disconnects when failure, thoroughly to stop powering to power grid.
After backward current disappears, re-attached inverter and power grid, or photovoltaic inversion is stepped up by algorithm
The output power of device.Therefore this output for reducing inverter or a kind of relatively passive protection mode for disconnecting contact, and drop
The output power of low inverter and the connection for disconnecting photovoltaic generating system and power grid can all cause photovoltaic generating system generated energy
Loss.Other are the generations for taking the mode of post to prevent reverse current, although can have certain effect still
It has a small amount of electric energy and flows into power grid, harm is generated to power grid.Both the above mode carries out photovoltaic power generation all can batteries to store energy
Device, not only increasing cost used and scrapped battery and also polluting the environment and be largely routed also will cause a degree of safety
Hidden danger and to the expansion of internet deficiency, user is difficult directly to check data and monitor, and wide usage is poor.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind based on long-range control
The hot energy storage control device of photovoltaic power generation common network counterflow-preventing and method are shared for small-sized factory, family's photovoltaic power generation and alternating current
The micro-grid system of user power utilization network can utilize upper solar energy power generating by every household, avoid a large amount of wirings,
It is both economically and environmentally beneficial using clean energy resource storing hot water energy；Prevent extra electric energy feed-in power grid from having an impact power grid by extra electric energy
For to hot-water energy accumulator and improving the utilization rate of solar energy resources to greatest extent and passing through GPRS (General Packet
Radio Service) it uploads cloud and can check dynamic anywhere or anytime, it is accurate using quick detection electricity method and scheduling strategy
Control electricity not generate the extra electric energy that can be admitted to power grid, and it is further true to generate pwm control logic timing using CPLD
Protect regulation to hot energy storage device, using one of its both economically and environmentally beneficial originality of the storing hot water energy of clean energy resource be with it is existing
Technology prevents adverse current from the purpose difference of counterflow-preventing occurs by switching circuit cutting output, in the way of post, adopts
With a kind of relatively reasonable control method, the second is using technology of Internet of things and cloud service technology.The working condition energy of system
It is monitored and is controlled whenever and wherever possible, achieved the purpose that hommization modernization, improve reliability.
The purpose of the present invention can be achieved through the following technical solutions:
For one kind based on the long-range control hot energy storage control device of photovoltaic power generation common network counterflow-preventing, which includes hot energy storage master control
Device module processed and the drive module being connected with the hot energy storage main controller module are used to be used as human-computer interaction display control circle
The touch screen in face and for the GPRS communication module for checking detection current intelligence of networking, the hot energy storage main controller module includes
Main control chip interconnected for integrally controlling and control PWM Timing driver is generated for instructing according to the main control chip
The CPLD chip of signal, the hot energy storage main controller module is by the CPLD chip and is set in the drive module
The H drive axle being made of IGBT is connected to generate the DC current for adjusting output electric current and be applied to hot energy storage device.
Further, the model STC15L2K60S2 of the main control chip, the model of the CPLD chip
EPM240T100C5N。
Further, which generates control logic PWM timing using the CPLD chip, which also utilizes single-chip microcontroller
Bus-extending technology controls the CPLD chip.
Further, the GPRS communication module uses USR-GPRS232-730, and the GPRS communication module passes through
RS485 serial ports is connected with the main control chip.
Further, which uses remote scheduling method, is carried out using the GPRS communication module by penetrating cloud
Remote scheduling.
Further, the main control module further includes voltage transformer, the Current Mutual Inductance for collection voltages electric current
Device and electric energy chip for being converted to signal, the voltage transformer and the current transformer pass through the electric energy
Chip is simultaneously connected with the main control chip, using the method and scheduling strategy of quick detection electricity, utilizes collection voltages electric current
Voltage transformer, current transformer and electric energy detection chip by electricity scheduling strategy algorithm electricity quickly detect with tune
Degree.
Further, which uses the control method of hot energy storage device, and the hot energy storage device uses cleanliness without any pollution
Hot water heated.
Further, the drive module further includes driving chip, and the CPLD chip amplifies by the driving chip
Signal is simultaneously connected with the H drive axle constituted of the IGBT in the drive module.
Further, the IGBT constitute H drive axle also with the Diode series for reducing switching tube backward voltage
Connection.
Further, the hot energy storage main controller module is also connected with switch power module, the Switching Power Supply mould
The input voltage of block is 5V or 24V.
The present invention also provides a kind of using as mentioned based on the hot energy storage control device of GPRS photovoltaic power generation common network counterflow-preventing
Countercurrent prevention control method, the Countercurrent prevention control method include by needed for hot energy storage consume electricity current target value and hot energy storage
Difference via controller between current detection value in device is input to described grid-connected based on the hot energy storage remotely controlled
It generates electricity after anti-reverse flow control device, generates new hot energy storage device output electric current and compared with current target value circulation with dynamic
State makes city's electric output meet consistently greater than 0 and be minimum value.
Compared with prior art, the invention has the following advantages that
(1) it is small that the method in the present invention, which shares user power utilization network with alternating current using solar energy power generating from structure,
Type factory, the power supply of family's micro-capacitance sensor, wherein solar energy power generating is that main power supply maximally utilises solar energy resources, only
Have in the case where solar energy power generating amount is inadequate using alternating current as supplement；Made with local household electrical appliance and hot energy storage device
For load.Solar energy photovoltaic generator and utility grid share user power utilization net, pass through solar energy power generating amount and alternating current
The supplement guarantee of electricity does not have backward current inflow, hot energy storage device therein as load can long-term standby consumption electric energy from
And it ensure that the electric current of alternating current output end is always ensured that greater than 0 and is minimum value, it is therefore prevented that the generation of backward current.
(2) on the other hand, no electric energy injection power grid will not impact the operation of power grid apparatus of the present invention, remove from
Electrical management licence limit, is mainly used for midget plant, the family occasion fixed to hot water demand time, and maximum magnitude is maximum
Photovoltaic energy and storing hot water energy clean energy resource is utilized in efficiency.Using remote scheduling method, the GPRS communication module of addition
It can also be communicated in real time with cloud, send data to platform, facilitate the real time monitoring and scheduling of user.So that domestic consumer
Extra electric energy can be used for storing hot water energy further with solar energy power generating realizes the use of clean energy resource.
(3) present invention stores extra photovoltaic power generation quantity using storing hot water energy, in photovoltaic power generation, hot energy storage, local load
Corresponding scheduling strategy is designed between power grid and is controlled by Anti-reflux controller, so that the output electricity at power grid end is big always
In zero and obtain minimum value, in this way in grid-connected photovoltaic system just be not present adverse current possibility.Anti-reverse flow control therein
Device is to generate PWM timing control driving circuit driving current by CPLD (Complex Programmable Logic Device)
Type PWM (Pulse Width Modulation) rectification circuit is by STC15L2K60S2 chip controls algorithm to hot energy storage electric current
Carry out precisely in real time adjust to achieve the purpose that control power so that output power it is adjustable and can unity power factor output,
Pollution will not be generated to bulk power grid, make side harmonics content small by LC resonance, further improve efficiency in addition to playing
The purpose for preventing backward current from generating can also can be supervised in real time by the GPRS Internet of things system of USR-GPRS-730 on network
Control, the dynamic that electricity can be received whenever and wherever possible by short message, further achieve the purpose of real-time monitoring.
(4) the GPRS Internet of things system for the USR-GPRS-730 that the present invention uses supports TCP/UDP agreement, server-side to provide
Server end secondary development bag, user grasp the online situation and data transmission of equipment, both facilitate User Exploitation, also improve
The uniformity of server end, stability and reliability；730 support four road Socket (port) link, can be by data to four
The demand that a server is sent, for data backup, long-range abnormal, the user of the demands such as diagnosis；730 support FTP (File
Transfer Protocol) his updating protocol, user equipment can request on ftp server by serial ports using particular protocol
, file facilitates customer equipment to carry out remote upgrade or the big file use of remote download；730 support network Heartbeat packet and serial ports
Heartbeat packet.Network Heartbeat packet notice server is in active state, keeps normal with server by constantly sending heartbeat packet
Connection.Serial heartbeat packet notice serial equipment is in active state, and actively crawl is unable to the sensing data of active push, builds
The monitoring of the extremely suitable this system platform data of the platform with check immediately.
(5) present invention shares midget plant and domestic consumer's power utilization network using solar energy power generating and alternating current, maximum
Solar energy resources are utilized to limit, community network eliminates the cumbersome of wiring.
Detailed description of the invention
Fig. 1 is cardinal principle system topology figure of the invention；
Fig. 2 is that system charge of the invention leads figure；
Fig. 3 is present system control block diagram；
Fig. 4 is present system main circuit analogous diagram；
Fig. 5 is main circuit structure figure of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Embodiment
Present invention cardinal principle topology diagram as shown in Figure 1 passes through light by the sent out direct current measurement of photovoltaic array
Volt inverter be converted into alternating current with alternating current share user power utilization network together be load and the heat storage for passing through Anti-reflux controller
Energy device provides electric energy, and real-time data transmission to the cloud platform built is checked for user, for small-sized household photovoltaic
Electricity generation system, using universal convenient storing hot water energy store extra electric energy to reached prevented electric current flow into power grid and
It improves the utilization rate of solar energy resources and remote real-time monitoring is achieved the purpose that by gprs system.
Since alternating current and alternating current that the direct current that photovoltaic array is sent out is converted by photovoltaic DC-to-AC converter share
User power utilization network, as shown in Figure 2, therefore anti-reverse Flow Policy established by the present invention is by being sent out photovoltaic array
The ac electric that direct current is converted through photovoltaic DC-to-AC converter is I2It is I with city's electricity output electricity1, the local institute's electricity consumption that loads is I3
It is that I carries out corresponding scheduling strategy with consumption electricity needed for hot energy storage, the constraint condition that static mathematical model obtains is established to it
It isIn view of the issuable influence of fluctuations of boundary condition, I1=0 in aspects.Always it protects
Demonstrate,prove I1> 0 and MinI1Can be so that alternating current output quantity be consistently greater than zero, that is, avoid and have electric current backflow and enter in power grid
Harm will not be generated to power grid to also fundamentally accomplish the generation of counterflow-preventing.
City electric output I ensure that by the Current Control Strategy of Fig. 21> 0 and MinI1, then further illustrated by Fig. 3 anti-
The course of work of upstream controller.When detecting city's power consumption and target value ipDifference special hour, quick start photovoltaic power generation
Device provides electricity, target value ipWith the detected value i detected in hot energy storage devicesAfter relatively, by difference between the two
Δ i is sent to by the controller of PI control and PWM control, controller controls photovoltaic power generation apparatus and provides electric energy, avoids alternating current
Low battery generates adverse current.As shown in Fig. 4 circuit diagram, by Matlab/Simulink simulation software, in above-mentioned analysis current mode
On the basis of PWM rectification circuit principle and timing control, the model of single-phase electricity flow pattern PWM rectification circuit is built, and emulate knot
Fruit is good, DC voltage there are a small amount of ripple, by DC side output power with exchange the ratio between the power of side, DC side is defeated
The efficiency of power is about 97% out.Fig. 5 is current type PWM rectification circuit main circuit structure figure.
The control process of apparatus of the present invention are as follows:
By current transformer and the collected electric current of voltage transformer and voltage value, pass through electric energy chip (the present embodiment
In specific type selecting be CS5463) be used for quickly detecting, the electricity that detects is controlled by main control chip STC15L2K60S2, to electricity
Amount is controlled by certain algorithm, and thus generates control PWM Timing driver to control CPLD EPM240T100C5N, by
Driving chip further expansion in driving plate is to the driving signal of IGBT, with this come opening and turning off by IGBT drive axle
Generate direct current, in current type PWM rectified current containing with the concatenated diode of IGBT, play to block the direction electricity on bridge arm
Stream, and can reduce the effect of the backward voltage of switching tube；USR-GPRS232-730 passes through RS485 serial ports and main control chip
Connection, the data that will test upload to cloud, can check dynamic by networking；Switching Power Supply can provide 24V and 5V pressure stabilizing
Driving plate and control panel provide voltage；Finally by touch serial ports screen as human-computer interaction display control interface.
There is the deficiency of " post " for the prior art in the present invention, sent out in counterflow-preventing method using photovoltaic
Electricity with alternating current share user power utilization network together with the small home micro-grid system that forms, be scheduled the analysis of strategy so that beginning
Guarantee alternating current output end I eventually1> 0 and MinI1, to prevent the generation of backward current, fundamentally solve asking for counterflow-preventing
Topic.And the cloud platform built can be with remote real-time monitoring data, to solve system and internet connectivity problem.Using hot water
Energy storage solves the problems, such as higher cost, environmental pollution and wiring.
Creativeness of the invention is mainly:
1, midget plant and domestic consumer's power utilization network are shared using solar energy power generating and alternating current, to greatest extent land productivity
With solar energy resources, community network eliminates the cumbersome of wiring.
2, using hot energy storage device and control method as new era fastest-rising chemical energy storage technology, using hot energy storage
Device is utilized clean water resources both economically and environmentally beneficially, control device be using single-phase electricity flow pattern PWM rectifier to photovoltaic simultaneously
The alternating current that net inverter obtains, which is rectified, controls DC side electric current, thus obtain the controllable unit power of power because
The lesser voltage on line side electric current of several output and harmonic content, further improves efficiency.
3, it using rapid detection method and scheduling strategy, is quickly detected using electric energy chip mutual by current transformer and voltage
The collected electric current of sensor, voltage recycle main control chip to be precisely controlled using corresponding scheduling strategy algorithm to electricity
Achieve the purpose that control power stability output；Current Control Strategy is always ensured that so that I1> 0 and MinI1, utility grid deposits always
In the output quantity of electric current, there is no the possibility that backward current flows into power grid, fundamentally achieved the purpose that counterflow-preventing.
4, using remote scheduling method, cloud platform has been built using GPRS communication module, has made data access internet, it can be remote
Range monitoring meets big internet big data era environment of today.
5, control logic PWM timing is generated using CPLD Complex Programmable Logic Devices, extends skill using microcontroller bus
Art controls CPLD, avoids the situation that common single-chip microcontroller generates inaccuracy to PWM timing.
Novelty of the invention is not both to the prior art:
1, for the proposition of solar energy power generating and the shared user power utilization network of alternating current in present system, solar energy
Photovoltaic power generation is the powering mode supplemented by main mains-supplied, and solar energy resources are greatly utilized and eliminate a large amount of cloth
Line.
2, for the proposition of detection method of quantity of electricity and scheduling controlling strategy in present system, so that I1> 0 and MinI1,
Play the role of in countercurrent prevention system of the present invention it is vital, in addition chip intelligent control addition, the control for system
The output that more stability and high efficiency can be obtained further with adjusting, is used for storing hot water energy for extra electric energy.
3, transparent transmission cloud platform and hardware support kit equipment, the purpose for realizing real-time communication of full completion have been used.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (8)
1. one kind is based on the long-range control hot energy storage control device of photovoltaic power generation common network counterflow-preventing, which is characterized in that the device includes
Hot energy storage main controller module and the drive module being connected with the hot energy storage main controller module are used to be used as human-computer interaction
The touch screen at display control interface and for network check detection current intelligence GPRS communication module, the hot energy storage main control
Device module includes the main control chip interconnected for integrally controlling and generates control for instructing according to the main control chip
The CPLD chip of PWM Timing driver signal, the hot energy storage main controller module is by the CPLD chip and is set to described
The H drive axle being made of IGBT in drive module is connected to generate the DC current for adjusting output electric current and be applied to
Hot energy storage device.
2. one kind according to claim 1 controls the hot energy storage control device of photovoltaic power generation common network counterflow-preventing based on long-range,
It is characterized in that, the model STC15L2K60S2, the model EPM240T100C5N of the CPLD chip of the main control chip.
3. one kind according to claim 2 controls the hot energy storage control device of photovoltaic power generation common network counterflow-preventing based on long-range,
It is characterized in that, which generates control logic PWM timing using the CPLD chip, which also utilizes microcontroller bus to extend
Technology controls the CPLD chip.
4. one kind according to claim 1 controls the hot energy storage control device of photovoltaic power generation common network counterflow-preventing based on long-range,
It is characterized in that, the GPRS communication module uses USR-GPRS232-730, and the GPRS communication module passes through RS485 serial ports
It is connected with the main control chip.
5. one kind according to claim 4 controls the hot energy storage control device of photovoltaic power generation common network counterflow-preventing based on long-range,
It is characterized in that, which uses remote scheduling method, carries out remote scheduling by penetrating cloud using the GPRS communication module.
6. one kind according to claim 1 controls the hot energy storage control device of photovoltaic power generation common network counterflow-preventing based on long-range,
It is characterized in that, the main control module further includes the voltage transformer for collection voltages electric current, current transformer and is used for
To the electric energy chip that signal is converted, the voltage transformer and the current transformer pass through the electric energy chip and with
The main control chip is connected.
7. one kind according to claim 1 controls the hot energy storage control device of photovoltaic power generation common network counterflow-preventing based on long-range,
It is characterized in that, the hot energy storage device is heated using the hot water of cleanliness without any pollution.
8. a kind of using as described in claim 1 based on the long-range control hot energy storage control device of photovoltaic power generation common network counterflow-preventing
Countercurrent prevention control method, which is characterized in that the Countercurrent prevention control method includes by the current target of consumption electricity needed for hot energy storage
Difference via controller between current detection value in value and hot energy storage device is input to the hot energy storage light based on GPRS
After photovoltaic grid-connected anti-reverse flow control device, generate new hot energy storage device output electric current and with the current target value recycle ratio
It is consistently greater than 0 and compared with meet city's electric output for minimum value.
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| CN201910567457.3A CN110212560B (en) | 2019-06-27 | 2019-06-27 | Remote control photovoltaic power generation-based common-network countercurrent-preventing thermal energy storage control device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768376A (en) * | 2019-10-22 | 2020-02-07 | 南宁职业技术学院 | Family micro-grid system based on cloud storage |
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