CN105207341A - Grid-connected and off-grid type photovoltaic energy-storage charging pile control device and method - Google Patents
Grid-connected and off-grid type photovoltaic energy-storage charging pile control device and method Download PDFInfo
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- CN105207341A CN105207341A CN201510593266.6A CN201510593266A CN105207341A CN 105207341 A CN105207341 A CN 105207341A CN 201510593266 A CN201510593266 A CN 201510593266A CN 105207341 A CN105207341 A CN 105207341A
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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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Abstract
The invention relates to a grid-connected and off-grid type photovoltaic energy-storage charging pile control device. The device is characterized in that a photovoltaic system (1), an energy storage system (2), a DC/DC converter (3), a DC/AC converter (4), a monitoring system (5), a power grid unit (6) and a charging pile (7) are included; the photovoltaic system (1), the energy storage system (2), the DC/DC converter (3) and the charging pile (7) are connected with the monitoring system (5) through RS485; the photovoltaic system (1), the energy storage system (2) and the DC/AC converter (4) are connected with the DC/DC converter (3); the power grid unit (6) and the charging pile (7) are connected with the DC/AC converter (4); the monitoring system (5) detects the current and the voltage of the power grid unit (6) and the current of the charging pile (7). Compared with the prior art, the grid-connected and off-grid type photovoltaic energy-storage charging pile control device integrates power generation, energy storage and grid-connected and off-grid control, and has the advantages of being high in system efficiency, low in cost, capable of achieving energy conservation and environment protection, high in system safety and high in charging efficiency.
Description
Technical field
The present invention relates to one and from net Blast Furnace Top Gas Recovery Turbine Unit (TRT), especially relate to a kind of and from the control device of net type photovoltaic energy storage charging pile and method.
Background technology
Photovoltaic generating system is the electricity generation system utilizing solar cell directly solar energy to be converted to electric energy.Its critical piece is solar cell, storage battery, controller and inverter, after electrical power storage to storage battery, delivers to electrical network by inverter.
Grid-connected solar energy power generating refers to that solar energy power generating is connected to the mode of the generating of national grid, and become supplementing of electrical network, characteristic feature is not for need storage battery.But due to the grid-connected power generation system such as current photovoltaic, wind-force to hold reliability low, intelligent grid has not also been set up simultaneously, for guaranteeing that photovoltaic generating system electricity power is the directly local load electricity consumption of supply, and be not fed to electrical network, need in grid-connected power generation system, to add one and from net type photovoltaic energy storage inverse control system, to realize and from network operation and and switch from net simultaneously.At present in order to realize this function, whole system needs to carry out photovoltaic inversion, energy storage and and from network control system, but when photovoltaic system energy surplus, easily produces adverse current, damage system.
Summary of the invention
Object of the present invention is exactly provide a kind of collection generating, energy storage be made as one from network control to overcome defect that above-mentioned prior art exists, effectively prevent adverse current and from the control device of net type photovoltaic energy storage charging pile and method.
Object of the present invention can be achieved through the following technical solutions:
A kind of and from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, comprise photovoltaic system, energy-storage system, DC/DC converter, DC/AC converter, supervisory control system, electrical network unit and charging pile, described photovoltaic system, energy-storage system, DC/DC converter is connected with supervisory control system respectively by RS485 with charging pile, described photovoltaic system, energy-storage system is connected with DC/DC converter respectively with DC/AC converter, described electrical network unit is connected with DC/AC converter respectively with charging pile, the electric current of described supervisory control system detection of grid unit and voltage, the electric current of charging pile, supervisory control system detects the generated output of photovoltaic system, the charge power of charging pile, and the energy storage state of energy-storage system, and to the charge power according to charging pile, the generated output of photovoltaic system and the discharge and recharge of energy-storage system are regulated.
Described electrical network unit is connected with DC/AC converter respectively by contactor with charging pile, described contactor is connected with supervisory control system by RS485, the electric current of the electric current of supervisory control system detection of grid unit and voltage, charging pile, when there is overcurrent or overvoltage in electrical network unit, or charging pile is when occurring overcurrent, supervisory control system control contactor makes it disconnect.
Described DC/DC converter is with MPPT function.
Described supervisory control system is with warning and display device, and when overcurrent or overvoltage appear in electrical network unit, or when overcurrent appears in charging pile, warning and display device are reported to the police and show voltage and current.
Adopt described and carry out the method for inversion control from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, the method comprises the following steps:
1) photovoltaic system is charged to charging pile by DC/DC converter and DC/AC converter successively, supervisory control system detects the charge power value P2 of charging pile, simultaneously by receiving the output power value P1 that photovoltaic system sends, and the difference both judging, if P1 > is P2, then enter step 2), if P1 < is P2, then enter step 3);
2) energy-storage system sends SOC state information to supervisory control system, if the unsaturation of energy-storage system energy, then enters step 201), if energy-storage system energy is full of, then enter step 202);
201) DC/DC convertor controls energy-storage system charges with performance number P3, wherein P3=P1-P2, and gets back to step 1);
202) supervisory control system notice DC/DC converter reduces power output P1, makes P1=P2, and gets back to step 1);
3) make P4=P2-P1, energy-storage system sends SOC state information to supervisory control system, if energy-storage system energy is can discharge condition, then enters step 301), if energy-storage system energy was put state, then enter step 302);
301) supervisory control system makes energy-storage system with performance number P4 power output by control DC/AC converter, and gets back to step 1);
302) power output of the given energy-storage system of supervisory control system is 0, and electrical network unit provides size to be the power of P4 to charging pile, and gets back to step 1).
Compared with prior art, the present invention has the following advantages:
(1) collection generating, energy storage be made as one from network control, only need carry out an inversion, decrease inversion number of times, add system effectiveness, reduce cost.
(2) by photovoltaic generation stored in energy-storage system, and when energy-storage system electricity is sufficient, can directly electric energy be directly provided to power to charging pile by this device, counterflow-preventing control can be carried out by supervisory control system when photovoltaic energy is unnecessary, there is the feature of energy-conserving and environment-protective, ensure generation of electricity by new energy maximizing efficiency.
(3) contactor is connected with supervisory control system by RS485, and the closed and disconnected of supervisory control system Long-distance Control contactor, automatically carries out and from network operation and switching, raise the efficiency, and improves supervisory control system fail safe simultaneously.
(4) DC/DC converter is with MPPT function, and the stepless level and smooth power output of energy, improves energy-storage system charge efficiency.
(5) supervisory control system is with warning and display device, and when overcurrent or overvoltage appear in electrical network unit, warning and display device are reported to the police and show voltage and current, and contactor disconnects simultaneously, improves the fail safe of electrical network unit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented premised on technical solution of the present invention, give detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figure 1, a kind of and from the control device of net type photovoltaic energy storage charging pile, comprise photovoltaic system 1, energy-storage system 2, DC/DC converter 3, DC/AC converter 4, supervisory control system 5, electrical network unit 6 and charging pile 7, described photovoltaic system 1, energy-storage system 2, DC/DC converter 3 are connected with supervisory control system 5 respectively by RS485 with charging pile 7, thus realize Long-distance Control.Described photovoltaic system 1, energy-storage system 2 are connected with DC/DC converter 3 respectively with DC/AC converter 4, described electrical network unit 6 is connected with DC/AC converter 4 respectively by contactor 8 with charging pile 7, described contactor 8 is connected with supervisory control system 5 by RS485, the closed and disconnected of supervisory control system 5 control contactor 8, automatically to carry out and from network operation and switching, improve operational efficiency, improve supervisory control system 5 fail safe.The electric current of described supervisory control system 5 detection of grid unit 6 and voltage, the signal input part of supervisory control system 5 is connected the electric current of charging pile 7 with charging pile by AC power distribution cabinet/AC distribution panel simultaneously, judges whether photovoltaic power generation quantity meets charging pile 7 and use.
Photovoltaic system 1; Comprise solar cell, realize photovoltaic generation; Energy-storage system 2 comprises storage battery, realizes stored energy and release.
Described DC/DC converter 3 is with MPPT (MaximumPowerPointTracking, MPPT maximum power point tracking) function, and the stepless level and smooth power output of energy, improves energy-storage system charge efficiency.
Described supervisory control system 5 is central order unit (COU) of this device, it not only monitors the electric current and voltage of described charging pile unit 7 and electrical network unit 6 in real time, detect the reverse power be connected to the grid, and can according to different photovoltaic power and load, select the mode of operation of suitable energy-storage system 2 energy-storage battery, ensure energy do not bother to see me out electrical network unit 6 prerequisite under, the efficiency of photovoltaic generation is increased to maximum.The signal input part of supervisory control system 5 is connected with the signal output part of the DC/DC converter 3 of band MPPT, the generating information of photovoltaic system 1 is passed to supervisory control system 5 by the DC/DC converter 3 of MPPT, and supervisory control system 5 regulates the generating capacity of photovoltaic system 1 by the DC/DC converter 3 of band MPPT.The signal input part of supervisory control system 5 is connected with the signal output part of DC/AC converter 4 and energy-storage system 2, and supervisory control system 5, according to the power consumption size of charging pile 7, regulates energy-storage system 5 to system charge or discharge by control DC/AC4.
Supervisory control system 5 is also with warning and display device, and when overcurrent or overvoltage appear in electrical network unit 6, or when overcurrent appears in charging pile 7, warning and display device are reported to the police and show voltage and current, and contactor 8 disconnects simultaneously, improves the fail safe of electrical network unit.
Adopt described and carry out the method for inversion control from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, the method comprises the following steps:
S01, supervisory control system 5 detects the charge power value P2 of charging pile 7, simultaneously by receiving the output power value P1 that photovoltaic system 1 sends, and the difference both judging, if P1 > is P2, then enter step S02, if P1 < is P2, then enter step S02;
S02, energy-storage system 2 sends SOC (StateofCharge, charged state) state information to supervisory control system 5, if the unsaturation of energy-storage system 2 energy, then enters step S0201, if energy-storage system 2 energy is full of, then enters step S0202;
S0201, DC/DC converter 3 controls energy-storage system 2 and charges with performance number P3, wherein P3=P1-P2, and gets back to step S01;
S0202, supervisory control system 5 notifies that DC/DC converter 3 reduces power output P1, makes P1=P2, thus prevents adverse current from occurring, and gets back to step S01;
S03, makes P4=P2-P1, and energy-storage system 2 sends SOC state information to supervisory control system 5, if energy-storage system 2 energy is can discharge condition, then enters step S0301, if energy-storage system 2 energy was put state, then enters step S0302;
S0301, supervisory control system 5 control DC/AC converter 4 with performance number P4 power output, and gets back to step S01 by energy-storage system 2;
S0302, the power output of the given energy-storage system 2 of supervisory control system 5 is 0, and electrical network unit 6 provides size to be the power of P4 to charging pile 7, and gets back to step S01.
This assembly first uses new forms of energy electric power, by photovoltaic generation stored in energy-storage system 2, and when energy-storage system 2 electricity is sufficient, can directly electric energy be directly provided to power to charging pile 7 by this device, counterflow-preventing control can be carried out by supervisory control system 5 when photovoltaic energy is unnecessary, and preferentially ensure to charging pile 7 electricity consumption, meet local load electricity consumption electricity consumption requirement, photovoltaic system 1 generate electricity and energy-storage system 2 electricity shortage time, electrical network unit 6 is used to power to charging pile 7, there is the feature of energy-conserving and environment-protective, ensure generation of electricity by new energy maximizing efficiency.
Claims (5)
1. one kind and from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, comprise photovoltaic system (1), energy-storage system (2), DC/DC converter (3), DC/AC converter (4), supervisory control system (5), electrical network unit (6) and charging pile (7), described photovoltaic system (1), energy-storage system (2), DC/DC converter (3) is connected with supervisory control system (5) respectively by RS485 with charging pile (7), described photovoltaic system (1), energy-storage system (2) is connected with DC/DC converter (3) respectively with DC/AC converter (4), described electrical network unit (6) is connected with DC/AC converter (4) respectively with charging pile (7), described supervisory control system (5) detects the generated output of photovoltaic system (1), the charge power of charging pile (7), and the energy storage state of energy-storage system (2), and to the charge power according to charging pile (7), the generated output of photovoltaic system (1) and the discharge and recharge of energy-storage system (2) are regulated.
2. according to claim 1 a kind of and from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, described electrical network unit (6) is connected with DC/AC converter (4) respectively by contactor (8) with charging pile (7), described contactor (8) is connected with supervisory control system (5) by RS485, the electric current of supervisory control system (5) detection of grid unit (6) and voltage, the electric current of charging pile (7), when there is overcurrent or overvoltage in electrical network unit (6), or when there is overcurrent in charging pile (7), supervisory control system (5) control contactor (8) makes it disconnect.
3. according to claim 1 a kind of and from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, described DC/DC converter (3) is with MPPT function.
4. according to claim 1 a kind of and from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, described supervisory control system (5) is with warning and display device, when there is overcurrent or overvoltage in electrical network unit (6), or charging pile (7) is when occurring overcurrent, to report to the police and display device is reported to the police and shows voltage and current.
5. adopt as arbitrary in Claims 1 to 4 as described in and carry out the method for inversion control from the control device of net type photovoltaic energy storage charging pile, it is characterized in that, the method comprises the following steps:
1) photovoltaic system (1) is charged to charging pile (7) by DC/DC converter (3) and DC/AC converter (4) successively, supervisory control system (5) detects the charge power value P2 of charging pile (7), simultaneously by receiving the output power value P1 that photovoltaic system (1) sends, and the difference both judging, if P1 > is P2, then enter step 2), if P1 < is P2, then enter step 3);
2) energy-storage system (2) sends SOC state information to supervisory control system (5), if energy-storage system (2) energy unsaturation, then enter step 201), if energy-storage system (2) energy is full of, then enter step 202);
201) DC/DC converter (3) control energy-storage system (2) charges with performance number P3, wherein P3=P1-P2, and gets back to step 1);
202) supervisory control system (5) notice DC/DC converter (3) reduces power output P1, makes P1=P2, and gets back to step 1);
3) P4=P2-P1 is made, energy-storage system (2) sends SOC state information to supervisory control system (5), if energy-storage system (2) energy is can discharge condition, then enter step 301), if energy-storage system (2) energy was put state, then entered step 302);
301) supervisory control system (5) makes energy-storage system (2) with performance number P4 power output by control DC/AC converter (4), and gets back to step 1);
302) power output of supervisory control system (5) given energy-storage system (2) is 0, and electrical network unit (6) provides size to be the power of P4 to charging pile (7), and gets back to step 1).
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Cited By (11)
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| CN105490372A (en) * | 2016-01-08 | 2016-04-13 | 辽宁北方节能股份有限公司 | Solar alternating current charging pile capable of automatically switching power supplies |
| CN106356848A (en) * | 2016-10-19 | 2017-01-25 | 宁波江东晶量电子科技有限公司 | Adaptive charging pile charging control system and method |
| CN106828170A (en) * | 2017-03-07 | 2017-06-13 | 广州灿明都科技有限责任公司 | Anti-reverse flow control system and method |
| CN108199489A (en) * | 2018-01-24 | 2018-06-22 | 宁波大家小家网络科技有限公司 | A kind of method and system of the electricity consumption data monitoring analysis of photovoltaic power generation apparatus |
| CN109088429A (en) * | 2018-08-01 | 2018-12-25 | 国网四川省电力公司电力科学研究院 | A kind of grid-connected system of light-storage complementation |
| CN109950924A (en) * | 2017-12-26 | 2019-06-28 | 斯贝兰德工程技术（北京）有限公司 | A kind of photovoltaic energy storage inversion power supply system |
| CN110497815A (en) * | 2019-07-17 | 2019-11-26 | 青岛海尔空调器有限总公司 | Method and device for supplying power to charging pile and charging pile |
| CN112803458A (en) * | 2021-01-12 | 2021-05-14 | 南京信息工程大学 | Current sharing control method for solar station and parallel inverter power supply |
| CN112937342A (en) * | 2021-03-10 | 2021-06-11 | 上海电机学院 | Electric vehicle power sharing group charging system and method thereof |
| CN113415198A (en) * | 2021-06-29 | 2021-09-21 | 欣旺达电动汽车电池有限公司 | Intelligent charging control method and system, electronic equipment and storage medium |
| CN114744659A (en) * | 2022-04-28 | 2022-07-12 | 广东天枢新能源科技有限公司 | Energy storage charging and discharging control method and device and storage medium |
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| CN112803458A (en) * | 2021-01-12 | 2021-05-14 | 南京信息工程大学 | Current sharing control method for solar station and parallel inverter power supply |
| CN112803458B (en) * | 2021-01-12 | 2023-08-22 | 南京信息工程大学 | Solar station and parallel inverter power supply current sharing control method |
| CN112937342A (en) * | 2021-03-10 | 2021-06-11 | 上海电机学院 | Electric vehicle power sharing group charging system and method thereof |
| CN113415198A (en) * | 2021-06-29 | 2021-09-21 | 欣旺达电动汽车电池有限公司 | Intelligent charging control method and system, electronic equipment and storage medium |
| CN113415198B (en) * | 2021-06-29 | 2023-03-10 | 欣旺达电动汽车电池有限公司 | Intelligent charging control method and system, electronic equipment and storage medium |
| CN114744659A (en) * | 2022-04-28 | 2022-07-12 | 广东天枢新能源科技有限公司 | Energy storage charging and discharging control method and device and storage medium |
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Application publication date: 20151230 |