CN112769243A - Battery energy storage power station application system and method for peak clipping and valley filling - Google Patents
Battery energy storage power station application system and method for peak clipping and valley filling Download PDFInfo
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- CN112769243A CN112769243A CN202110264190.8A CN202110264190A CN112769243A CN 112769243 A CN112769243 A CN 112769243A CN 202110264190 A CN202110264190 A CN 202110264190A CN 112769243 A CN112769243 A CN 112769243A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 13
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
- H02J15/00—Systems for storing electric energy
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a battery energy storage power station application system and method for peak clipping and valley filling, and relates to the technical field of battery energy storage power stations.
Description
Technical Field
The invention relates to the technical field of battery energy storage power stations, in particular to a battery energy storage power station application system and method for peak clipping and valley filling.
Background
The huge difference of the power load between the peak time and the low time brings great difficulty to the generation and the scheduling of electric energy, in order to reduce the huge difference of the power demand between the peak and valley electricity time, the peak and valley time-of-use price policy is released by various development committees and power grid companies, and the peak and valley time-of-use price is implemented, the peak and valley price difference interval of the current national power utilization province reaches 0.4-0.9 yuan/kWh, which is beneficial to encouraging users to reasonably transfer the power load, cut peaks and fill valleys, reduce the power load rate between the peak and valley time, improve the utilization efficiency of the capacity of system equipment and save energy. For users, the peak time period uses less electricity, the valley time period uses more electricity, the income can be earned by utilizing the peak-valley electricity price difference, the electricity cost is favorably reduced, but the existing battery energy storage power station can not achieve better charging and discharging effects.
Disclosure of Invention
The present invention is directed to a battery energy storage power station application system and method for peak clipping and valley filling, so as to overcome the above-mentioned drawbacks in the prior art.
A battery energy storage power station application system for peak clipping and valley filling comprises an electric energy conversion unit, a battery energy storage unit and a monitoring unit;
the electric energy conversion unit is used for converting alternating current generated by commercial power or a generator into direct current to be stored in the storage battery at valley time or ordinary time, and converting the direct current stored in the storage battery into alternating current to be used by a load at peak time;
the battery energy storage unit is used for storing and releasing direct current;
the monitoring unit is used for remotely controlling the charge and discharge of the electric quantity in the energy storage system and processing various generated data.
Preferably, the electric energy conversion unit includes transformer, energy storage bidirectional inverter and communication manager, the transformer is connected to the electric wire netting generating line, energy storage bidirectional inverter is connected with the transformer, communication manager is connected with energy storage bidirectional inverter's communication end, battery energy storage unit is including converging cabinet, switch board and battery cabinet, the battery cabinet has the multiunit to every group battery cabinet all is connected with converge the cabinet, converge the cabinet and be connected with the switch board one-to-one, the monitoring unit includes local SCADA system and high in the clouds control, switch board and communication manager all are connected with local SCADA system, local SCADA system connect to the high in the clouds control.
Preferably, the battery cabinet includes multiunit electronic box and a set of master control case, all includes a plurality of electric cores in every group electronic box, the electric core is in groups according to 14S 1P' S mode, and the electric core specification is 3.2V/230Ah, the master control case includes that battery management system follows accuse module and AD/DC power lamp electrical component, battery management system follows the accuse module and can carry out when charging and discharging at the electronic box, and real time monitoring battery operating condition in the battery box carries out real-time detection and report to states such as total voltage, total current, monomer voltage, battery temperature of electronic box to report to excessive pressure is undervoltage, under-temperature and report to the police, AD/DC power lamp electrical component is used for providing 24V control power for the electronic box.
Preferably, the transformer adopts a 3200kVA double-split transformer and is connected with a total drop 6kV side alternating current bus.
Preferably, the control cabinet is connected with a single chip microcomputer control panel in the confluence cabinet through an RS485 bus.
A method for a battery energy storage power station application system for peak clipping and valley filling comprises the following specific steps:
s1, the local SCADA system receives the time-of-use electricity price information from the cloud monitoring, judges whether to enter one of the peak time interval, the valley time interval and the flat time interval, executes the corresponding mode according to the time interval to which the local SCADA system belongs, executes S2 when entering the peak time interval, executes S3 when entering the valley time interval or the flat time interval,
s2, controlling the battery cell in the battery cabinet to discharge, comparing and judging the relation between the energy storage maximum output Pa and the load size to calculate the output target power Pb, when the load is greater than the energy storage maximum output Pa, the output target power Pb is equal to the energy storage maximum output Pa, and when the load is less than the energy storage maximum output Pa, the output target power Pb is equal to the load output;
and S3, controlling the battery cell in the battery cabinet to charge, calculating a difference value Pc between the rated power of the transformer and the power load, judging the relation between the difference value Pc and the maximum output power Pa of the stored energy, wherein the minimum value Pe of the target power Pd is Min (Pc, Pa), the target power Pe subtracts a fixed threshold value to obtain a target power Pf, so that the phenomenon that the power is wasted by the power grid which is fed back by the power plant area in power is prevented, the target power Pf is sent to each energy storage subunit according to a certain proportion, and the target of SOC balance of each subsystem is followed in the distribution process.
The invention has the following advantages:
when the system is used, the energy storage system can be remotely controlled through the monitoring unit, the charging and discharging of the battery cell in the battery cabinet can be realized by accurately calculating and automatically controlling the energy storage system in three time periods of a peak time period, a valley time period and a normal time period, when the battery cell is discharged, the corresponding output target power can be adjusted according to the load, the phenomenon that power is wasted when the power is reversely transmitted to a power grid in a plant area in power can be prevented when the battery cell is charged, and electric energy is distributed according to the aim of SOC balance of each subsystem, so that the power utilization cost of an enterprise can be greatly saved, and the economic benefit of the enterprise can be improved.
Drawings
FIG. 1 is a system block diagram of the present invention.
FIG. 2 is a flow chart of charging and discharging according to the present invention.
Wherein: 1. transformer, 2, energy storage bidirectional inverter, 3, communication manager, 4, converge the cabinet, 5, switch board, 6, battery cabinet, 7, local SCADA system, 8, high in the clouds control.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention.
As shown in fig. 1-2, the present invention provides a battery energy storage power station application system for peak clipping and valley filling, which includes an electric energy conversion unit, a battery energy storage unit and a monitoring unit;
the electric energy conversion unit is used for converting alternating current generated by commercial power or a generator into direct current to be stored in the storage battery at valley time or ordinary time, and converting the direct current stored in the storage battery into alternating current to be used by a load at peak time;
the battery energy storage unit is used for storing and releasing direct current;
the monitoring unit is used for remotely controlling the charge and discharge of the electric quantity in the energy storage system and processing various generated data.
In this embodiment, the electric energy conversion unit includes transformer 1, energy storage bidirectional inverter 2 and communication manager 3, transformer 1 is connected to the electric wire netting generating line, energy storage bidirectional inverter 2 is connected with transformer 1, communication manager 3 is connected with energy storage bidirectional inverter 2's communication end, battery energy storage unit includes conflux cabinet 4, switch board 5 and battery cabinet 6, battery cabinet 6 has the multiunit to every group battery cabinet 6 all is connected with conflux cabinet 4, conflux cabinet 4 is connected with switch board 5 one-to-one, the monitoring unit includes local SCADA system 7 and high in the clouds control 8, switch board 5 and communication manager 3 all are connected with local SCADA system 7, local SCADA system 7 be connected to high in the clouds control 8.
In this embodiment, battery cabinet 6 includes multiunit electronic box and a set of master control case, all includes a plurality of electric cores in every group electronic box, the electric core is grouped according to 14S 1P' S mode, and the electric core specification is 3.2V/230Ah, master control case includes battery management system slave control module and AD/DC power supply lamp electrical component, battery management system slave control module can be when the electronic box carries out charge-discharge, and real time monitoring battery operating condition in the battery box carries out real-time detection and report to states such as total voltage, total current, monomer voltage, battery temperature of electronic box to report to undervoltage excessive pressure, owe warm etc. and report to, AD/DC power supply lamp electrical component is used for providing 24V control power supply for the electronic box.
In this embodiment, the transformer 1 adopts a 3200kVA double-split transformer, and is connected to a total drop 6kV side ac bus.
In this embodiment, the control cabinet 5 is connected to the single chip microcomputer control board in the combiner cabinet 4 through an RS485 bus.
A method for a battery energy storage power station application system for peak clipping and valley filling comprises the following specific steps:
s1, the local SCADA system receives the time-of-use electricity price information from the cloud monitor 8, judges whether to enter one of the peak time interval, the valley time interval and the flat time interval, executes the corresponding mode according to the time interval to which the local SCADA system belongs, executes S2 when entering the peak time interval, executes S3 when entering the valley time interval or the flat time interval,
s2, controlling the battery cell in the battery cabinet 6 to discharge, comparing and judging the relation between the energy storage maximum output Pa and the load size to calculate the output target power Pb, when the load is greater than the energy storage maximum output Pa, the output target power Pb is equal to the energy storage maximum output Pa, and when the load is less than the energy storage maximum output Pa, the output target power Pb is equal to the load output;
and S3, controlling the battery cell in the battery cabinet 6 to charge, calculating a difference value Pc between the rated power of the transformer and the power load, judging the relation between the difference value Pc and the maximum output power Pa of the stored energy, wherein the minimum value Pe of the target power Pd is MinPc and Pa, the target power Pe subtracts a fixed threshold value to obtain a target power Pf, so that the phenomenon that the power is wasted by the power grid which is fed back by the power plant area in power is prevented, the target power Pf is sent to each energy storage subunit according to a certain proportion, and the target of SOC balance of each subsystem is followed in the distribution process.
The invention has been described above with reference to the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the invention, including those based on the spirit and scope of the invention, or other applications without modification.
Claims (6)
1. A battery energy storage power station application system for peak clipping and valley filling is characterized in that: the system comprises an electric energy conversion unit, a battery energy storage unit and a monitoring unit;
the electric energy conversion unit is used for converting alternating current generated by commercial power or a generator into direct current to be stored in the storage battery at valley time or ordinary time, and converting the direct current stored in the storage battery into alternating current to be used by a load at peak time;
the battery energy storage unit is used for storing and releasing direct current;
the monitoring unit is used for remotely controlling the charge and discharge of the electric quantity in the energy storage system and processing various generated data.
2. The battery energy storage power station application system for peak clipping and valley filling of claim 1, wherein: the electric energy conversion unit comprises a transformer (1), an energy storage bidirectional inverter (2) and a communication manager (3), the transformer (1) is connected to a power grid bus, the energy storage bidirectional inverter (2) is connected with the transformer (1), the communication manager (3) is connected with the communication end of the energy storage bidirectional inverter (2), the battery energy storage unit comprises a collecting cabinet (4), a control cabinet (5) and a battery cabinet (6), the battery cabinet (6) is provided with a plurality of groups, each group of battery cabinets (6) is connected with the confluence cabinet (4), the confluence cabinets (4) are correspondingly connected with the control cabinets (5) one by one, the monitoring unit comprises a local SCADA system (7) and a cloud monitoring (8), the control cabinet (5) and the communication manager (3) are both connected with a local SCADA system (7), the local SCADA system (7) is connected to the cloud monitoring (8).
3. The battery energy storage power station application system for peak clipping and valley filling of claim 2, wherein: battery cabinet (6) include multiunit electronic box and a set of master control case, all include a plurality of electric cores in every group electronic box, the electric core is in groups according to 14S 1P' S mode, and the electric core specification is 3.2V 230Ah, the master control case includes that battery management system follows accuse module and AD DC power lamp electrical component, battery management system follows the accuse module and can carry out when charging and discharging at the electronic box, and the battery operating condition in the real time monitoring battery box carries out real-time detection and report to states such as total voltage, total current, monomer voltage, battery temperature of electronic box to report to excessive pressure is undervoltage, under-temperature etc. and report to, AD DC power lamp electrical component is used for providing 24V control power for the electronic box.
4. The battery energy storage power station application system for peak clipping and valley filling of claim 2, wherein: the transformer (1) adopts a 3200kVA double-split transformer and is connected with a total drop 6kV side alternating current bus.
5. The battery energy storage power station application system for peak clipping and valley filling of claim 2, wherein: the control cabinet (5) is connected with the singlechip control panel in the confluence cabinet (4) through an RS485 bus.
6. A method for the peak and valley clipping battery energy storage power station application of any of the above claims 1 to 5, characterized in that: the method comprises the following specific steps:
s1, the local SCADA system receives the time-sharing electricity price information from the cloud monitoring (8), judges whether to enter one of the peak time interval, the valley time interval and the flat time interval, executes the corresponding belonged mode according to the time interval to which the local SCADA system belongs, executes S2 when entering the peak time interval, executes S3 when entering the valley time interval or the flat time interval,
s2, controlling the battery cell in the battery cabinet (6) to discharge, comparing and judging the relation between the energy storage maximum output Pa and the load, calculating the output target power Pb, when the load is greater than the energy storage maximum output Pa, the output target power Pb is equal to the energy storage maximum output Pa, and when the load is less than the energy storage maximum output Pa, the output target power Pb is equal to the load output;
and S3, controlling the battery core in the battery cabinet (6) to charge, calculating a difference value Pc between the rated power of the transformer and the power load, judging the relation between the difference value Pc and the maximum output power Pa of the stored energy, wherein the minimum value Pe of the target power Pd is Min (Pc, Pa), the target power Pe subtracts a fixed threshold value to obtain a target power Pf, preventing the phenomenon that the power is wasted by the power transmission power grid in the factory area, the target power Pf is issued to each energy storage subunit according to a certain proportion, and the target power Pf follows the target of the SOC balance of each subsystem in the distribution process.
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| US20160036228A1 (en) * | 2014-07-29 | 2016-02-04 | Sharp Laboratories Of America, Inc. | System and Method for Managing AC Power Using Auxiliary DC-to-AC Inversion |
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| CN109245140A (en) * | 2018-11-02 | 2019-01-18 | 谷明月 | A kind of tou power price industrial energy-storage system and its charge and discharge strategy |
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-
2021
- 2021-03-11 CN CN202110264190.8A patent/CN112769243A/en active Pending
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| US20160036228A1 (en) * | 2014-07-29 | 2016-02-04 | Sharp Laboratories Of America, Inc. | System and Method for Managing AC Power Using Auxiliary DC-to-AC Inversion |
| CN107154626A (en) * | 2017-06-02 | 2017-09-12 | 张飞飞 | Distributed photovoltaic intelligent energy manages SaaS systems with energy storage |
| CN108306327A (en) * | 2018-04-20 | 2018-07-20 | 江阴市新昶虹电力科技股份有限公司 | It is a kind of with generating electricity by way of merging two or more grid systems and user's distribution system of energy storage inversion system |
| CN109245140A (en) * | 2018-11-02 | 2019-01-18 | 谷明月 | A kind of tou power price industrial energy-storage system and its charge and discharge strategy |
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Address after: 241000 room 1501, block B, Mingzhu real estate Plaza, No. 2, Beijing Middle Road, Jinghu District, Wuhu City, Anhui Province Applicant after: Anhui Hailuo new energy Co.,Ltd. Address before: Room 201, building 1, No. 9, Wanjiang Avenue, Jiangbei concentration District, Wuhu City, Anhui Province 241000 Applicant before: Anhui Hailuo new energy Co.,Ltd. |
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Application publication date: 20210507 |