CN111799824A - Energy storage type power grid peak regulation system - Google Patents
Energy storage type power grid peak regulation system Download PDFInfo
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- CN111799824A CN111799824A CN202010792996.XA CN202010792996A CN111799824A CN 111799824 A CN111799824 A CN 111799824A CN 202010792996 A CN202010792996 A CN 202010792996A CN 111799824 A CN111799824 A CN 111799824A
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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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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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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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- 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
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/58—The condition being electrical
- H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The invention relates to an energy storage type power grid peak regulation system which comprises energy storage equipment, a power grid peak regulation controller II and a management platform, wherein the energy storage equipment is connected with a power grid; each power grid peak regulation controller II is provided with a unique ID code, all the ID codes are managed by a management platform in a unified grouping mode, the management platform receives a difference percentage difference value A of a difference value between a real-time load and a predicted load of a current power grid calculated by power grid dispatching and sends the difference percentage difference value A to the power grid peak regulation controller II, and the power grid peak regulation controller II charges energy storage equipment according to the priority and grouping order of the ID codes under the instruction of the difference value A of the management platform so as to increase the power consumption of the power grid or feed back the electric quantity stored by the energy storage equipment to the power grid; the invention utilizes the bidirectional communication between the management platform and the power grid peak regulation controller II to realize the purpose that the electricity end can use more electricity in the low ebb period of the power grid, and the electricity consumption and the feedback electricity are less in the high peak period, thereby reducing the peak-valley difference of the power grid, and ensuring that the electricity generation, the electricity supply and the electricity consumption are more stable, safe and economic.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to an energy storage type power grid peak shaving system.
Background
The grid peak-valley difference is the difference between the maximum load of 100% and the minimum load of the percentage of the maximum load in one cycle time of the power system, and is generally called as the daily peak-valley difference in a daily unit, and also includes the quarterly peak-valley difference and the annual peak-valley difference. The peak-valley difference of the power grid is too large, so that the power grid is not stable enough to influence the safe operation; the peak shaving unit is frequently started and stopped, and a lot of start and stop fuel oil and stable combustion oil can be consumed; the load of the operating thermal generator set is unstable, and the thermal load needs to be adjusted in real time, so that the economic index is reduced; the power plant must increase the spare capacity in order to have sufficient peak shaver requirements. In order to reduce the peak-valley difference of the power grid, the currently adopted method adopts time-of-use electricity price, sets up a water pumping energy storage power station, installs a peak regulation unit and the like to adjust the peak-valley difference. The time-of-use electricity price induces the electricity consumption of the users to be balanced as much as possible in the interest, but the end users have own electricity consumption rules and are limited in inducing effect, and a large amount of manpower and material resources are consumed for construction when a water pumping energy storage power station is designed or a peak shaving unit is installed, so that the time-of-use electricity price is not economical.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an energy storage type power grid peak shaving system, so that a user side can use more power in the low-ebb period of a power grid, and use less power and feed back in the high-peak period.
The technical scheme of the invention is as follows:
the energy storage type power grid peak shaving system comprises a plurality of energy storage devices, power grid peak shaving controllers II and a management platform, wherein the energy storage devices are connected with a power grid and can be charged and supply power to the power grid in a reverse direction;
each power grid peak regulation controller II is provided with a unique ID code, all the ID codes are managed by a management platform in a unified grouping mode, the management platform receives a difference percentage difference value A of a difference value between a real-time load and a predicted load of a current power grid calculated by power grid dispatching and sends the difference percentage difference value A to the power grid peak regulation controller II, and the power grid peak regulation controller II charges energy storage equipment according to the priority of the ID codes and the grouping order under the instruction of the difference value A of the management platform to increase the power consumption of the power grid or feed back the electric quantity stored by the energy storage equipment to the power grid.
Further, the ID code is composed of 16 digits, the first six digits represent administrative divisions of installation positions of the grid peak shaving controller II, where the first three digits are accurate to provincial divisions, the fourth-sixth digits are accurate to county divisions, the seventh-eighth digits represent enabling years, the ninth digit represents priority levels of users, the tenth digit represents category items to which the users belong, the eleventh-sixteenth digits automatically fill charging amounts of the energy storage device and inverter feedback electric quantities corresponding to the low valley period after the grid peak shaving controller II is put into use, and the charging amounts of the energy storage device and the inverter feedback electric quantities are alternately displayed on a display screen of the grid peak shaving controller II.
Further, the priority levels include 10 levels, which are respectively 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, wherein the larger the capacity of the energy storage device is, the higher the priority is, and 9 is the highest priority; the category includes five categories, namely 1-energy storage, 2-street lamp, 3-electric vehicle, 4-family and 5-security, specifically, 1-energy storage represents mechanical energy storage such as a water tower system, a water storage tank system and a lifting machine feeding system, 2-street lamp represents a street lamp with an energy storage function, 4-family represents a household standby power supply, and 5-security represents an office security power supply, wherein the 3-electric vehicle, 4-family and 5-security have power storage and inversion equipment to realize charging and feeding functions.
Further, the management platform comprises a database, an operation module and a communication module, wherein accumulated data of daily, monthly, quarterly, annual power consumption, generated energy and energy storage equipment feedback electric quantity in a power supply area and the storage capacity of the energy storage equipment currently connected to the management platform are stored in the database, the operation module calculates the total capacity of the energy storage equipment needing to be installed according to the average value of peak-to-valley differences, calculates the total storage capacity of all the energy storage equipment connected to the management platform according to the energy storage quantity of the energy storage equipment, calculates the power supply quantity of a power grid required for filling all the energy storage equipment with the energy storage equipment according to the total capacity and the total storage capacity, and calculates the inversion electric quantity capable of being fed back to the power grid according to the total storage capacity; the communication module also sends time information to the power grid peak regulation controller II.
Further, the management platform continuously sends a difference value A to a power grid peak regulation controller II in a power grid valley period, the difference value A is provided by power grid dispatching, the power grid peak regulation controller II charges managed energy storage equipment according to priority, and all charging tasks are uniformly completed before the end of the valley period; the management platform sends the difference value A to the power grid peak shaving controller II once at a certain time interval, such as every minute, half minute or every 100ms, in the ordinary time period of the power grid, and the power grid peak shaving controller II performs charging control on the energy storage equipment or reversely transmits power to the inversion of the power grid according to the energy storage condition of the energy storage equipment managed by the power grid peak shaving controller II; the management platform sends the difference value A to the power grid peak regulation controller II at a certain time interval, such as every minute, half minute or every 100ms, in the power grid peak regulation period, the power grid peak regulation controller II inverts the stored electric quantity of the managed energy storage equipment into the electric quantity reversely sent by the power grid according to the priority, and at least 70% of the electric quantity of the storage battery is uniformly released to complete a reverse power transmission task before the peak period is finished.
Furthermore, the power grid peak regulation controller II adopts a modular design and comprises a mainboard circuit module, a power circuit module, a display circuit, a wireless communication interface circuit and a power output circuit; the main board circuit module comprises a single chip microcomputer, a temperature and humidity sensor and an infrared remote control receiving circuit; the power supply circuit module comprises an AC/DC conversion circuit and a DC/DC conversion circuit, the display circuit comprises a display module, the wireless communication interface circuit comprises a wireless communication module, the power output circuit comprises a charging current control circuit, a charging voltage detection circuit, a charging control circuit, an energy storage control circuit and a wiring terminal row, and the temperature and humidity sensor, the display module, the wireless communication interface circuit, the charging control circuit, the energy storage control circuit and the wiring terminal row are respectively and electrically connected to the corresponding I/0 interface of the single chip microcomputer.
Further, the peak shaving system of the energy storage type power grid further comprises a mechanical energy storage device, and the mechanical energy storage device at least comprises one of the following components: the system comprises a water tower water storage system, an air compressor air storage system and a water storage tank water storage system.
Further, the energy storage device comprises at least one of: the energy-storing street lamp comprises an energy-storing street lamp, an electric vehicle, a solar power generation system with energy storage, a storage battery pack, a household reserve power supply and an office security power supply, wherein the electric vehicle comprises an electric vehicle, an electric bicycle and an electric bus.
Furthermore, the energy storage street lamp comprises an AC/DC dual-purpose lamp and a storage battery, and the storage battery is electrically connected with the AC/DC dual-purpose lamp and the power grid peak regulation controller II.
Compared with the prior art, the invention has the beneficial effects that:
the invention utilizes the two-way communication between the management platform and the power grid peak regulation controller II to realize that the management platform sends an instruction to the power grid peak regulation controller II and receives the feedback information of the power grid peak regulation controller II, the data processing is carried out, the power grid dispatching calculates the difference value A, the management platform sends the difference value A to all the power grid peak regulation controllers II, the power grid peak regulation controllers II orderly increase the power consumption of the power grid according to the priority of the controlled equipment or feed the stored power back to the power grid under the instruction difference value A uniformly sent by the management platform, thereby realizing that the power consumption of the power utilization end is more used in the low valley period of the power grid, the power consumption of the power grid under 1KV can be effectively increased, the power consumption of the power grid peak and peak is reduced, the peak-valley difference of the power grid is reduced, and the power generation, supply and power utilization are more stable, stable and safe, The electricity is more reliable;
in practical application, an extensive power storage system controlled by the power grid peak regulation controller II needs to be established, so that after the method is applied, charging or feeding can be performed in each time interval, and the difference value between the highest load and the lowest load of the power grid can be controlled to be between 2% and 5% finally;
due to the distributed energy storage equipment, the situation that normal work and life are influenced due to the fact that users are not available due to power failure of a power grid is avoided, and the energy storage equipment can be used by most low-voltage power utilization units and can be used for power as usual, so that office work and life are not influenced;
the only information sent to the power grid peak regulation controller II by the management platform is the percentage of the difference between the real-time load and the predicted load of the power grid and the difference value A with plus-minus signs, so that the power grid information cannot be leaked, and the confidentiality is good.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a power supply circuit of the power grid peak shaving controller II according to the embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a display circuit of the power grid peak shaving controller II according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a wireless communication interface circuit of the power grid peak shaving controller II according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a power output circuit of the power grid peak shaving controller II according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of a main board circuit of the power grid peak shaving controller II according to the embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of an infrared remote control receiving circuit of the power grid peak shaving controller II according to the embodiment of the present invention.
Fig. 8 is a terminal diagram of a terminal block of the power grid peak shaving controller II according to the embodiment of the present invention.
Fig. 9 is a schematic circuit diagram of a dc dual-purpose lamp according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the energy storage type power grid peak shaving system includes a plurality of energy storage devices connected to a power grid and capable of being charged and supplying power to the power grid in a reverse direction, power grid peak shaving controllers II connected to the energy storage devices one by one, and a management platform in bidirectional wireless connection with all the power grid peak shaving controllers II;
each power grid peak regulation controller II is provided with a unique ID code, all the ID codes are managed by a management platform in a unified grouping mode, the management platform receives a difference value percentage difference value A of a difference value between a real-time load and a predicted load of a current power grid calculated by power grid dispatching and sends the difference value percentage difference value A to the power grid peak regulation controller II, the difference value A is positive or negative, and the power grid peak regulation controller II charges energy storage equipment according to the priority and grouping order of the ID codes under the instruction of the difference value A of the management platform to increase the power consumption of the power grid or feed back the electric quantity stored by the energy storage equipment to the power grid; therefore, the power is used more at the low ebb period of the power grid, the power is used less and the feedback is carried out at the peak period, and the peak-valley difference of the power grid is reduced.
Further, the ID code consists of 16 digits, the first six digits represent administrative divisions of installation positions of the power grid peak regulation controller II, the first three digits are accurate to provincial divisions, the fourth-sixth digits are accurate to county divisions, the seventh-eighth digits represent enabling years, the ninth digits represent priority levels of users, the tenth digits represent category items, the eleventh-sixteenth digits automatically fill charging amounts of energy storage equipment and inverter feedback electric quantity corresponding to low valley periods after the power grid peak regulation controller II is put into use, and the charging amounts of the energy storage equipment and the inverter feedback electric quantity are alternately displayed on a display screen of the power grid peak regulation controller II;
the priority levels comprise 10 levels which are respectively 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, wherein the higher the capacity of the energy storage equipment is, the higher the priority is, and the 9 is the highest priority; the categories include five categories, namely 1-energy storage, 2-street lamp, 3-electric vehicle, 4-family and 5-security guard. 4101822023000001 represents that the energy storage device controlled by the peak shaving controller II is the first electric vehicle with the priority level of 2 installed in 2020 of the spring city of Henan province; 410102198001111 represents the energy storage device controlled by the peak regulation controller II, which is the 001111 family of household standby power supply (containing battery pack) with the priority of 8 installed in 2019 in the Zhongyuan of Zheng State City in Henan province.
Further, the management platform comprises a database, an operation module and a communication module, wherein accumulated data of daily, monthly, quarterly, annual power consumption, generated energy and energy storage equipment feedback electric quantity in a power supply area and the storage capacity of the energy storage equipment currently connected to the management platform are stored in the database, the operation module calculates the total capacity of the energy storage equipment needing to be installed according to the average value of peak-to-valley differences, calculates the total storage capacity of all the energy storage equipment connected to the management platform according to the energy storage quantity of the energy storage equipment, calculates the power supply quantity of a power grid required for filling all the energy storage equipment with the energy storage equipment according to the total capacity and the total storage capacity, and calculates the inversion electric quantity capable of being fed back to the power grid according to the total storage capacity; the communication module also sends time information to the power grid peak regulation controller II. The energy storage devices of different priorities respond differently for different values of the difference a. On the premise that enough energy storage devices are installed in each electricity user, redundant electric quantity of the power grid is absorbed in time at the low-ebb time of the power grid through the management platform and the power grid peak shaving controller II, the electric quantity lacking in the power grid is supplemented at the high-peak time of the power grid, and the load of the power grid is stable to the maximum extent. For example, if the historical data in the management platform indicates that the difference between the real-time load and the predicted load in the local area, i.e. the difference a, varies within the range of ± 20%, the difference a is divided into 20 equal parts, i.e. the difference a is divided into 2%, and the response of each priority to the difference a is as follows:
table 1 user energy storage feed response table with each priority when estimated difference fluctuation range is ± 20%
Further, the management platform continuously sends a difference value A to a power grid peak regulation controller II in a power grid valley period, the difference value A is provided by power grid dispatching, the power grid peak regulation controller II charges managed energy storage equipment according to priority, and all charging tasks are uniformly completed before the end of the valley period; the management platform sends the difference value A to the power grid peak regulation controller II once in the ordinary time period of the power grid, such as every minute, half minute or every 100ms, and the power grid peak regulation controller II performs charging control on the energy storage equipment or reversely transmits power to the inversion of the power grid according to the energy storage condition of the energy storage equipment managed by the power grid peak regulation controller II; the management platform sends the difference value A to the power grid peak regulation controller II once every minute, half minute or every 100ms in the peak time period of the power grid, the power grid peak regulation controller II inverts the stored electric quantity of the managed energy storage equipment into the electric quantity reversely transmitted by the power grid according to the priority, and at least 70% of the electric quantity of the storage battery is uniformly released to complete the reverse power transmission task before the peak time period is finished. At least 20-30% of electric quantity is preferably reserved in the energy storage device for self use when the power grid is in power failure.
Further, as shown in fig. 2 to 8, the power grid peak shaving controller II adopts a modular design, and includes a main board circuit module, a power supply circuit module, a display circuit, a wireless communication interface circuit, and a power output circuit; the main board circuit module comprises a single chip microcomputer, a temperature and humidity sensor and an infrared remote control receiving circuit; the power supply circuit module comprises an AC/DC conversion circuit and a DC/DC conversion circuit, the display circuit comprises a display module, the wireless communication interface circuit comprises a wireless communication module, the power output circuit comprises a charging current control circuit, a charging voltage detection circuit, a charging control circuit, an energy storage control circuit and a wiring terminal row, and the temperature and humidity sensor, the display module, the wireless communication interface circuit, the charging control circuit, the energy storage control circuit and the wiring terminal row are respectively and electrically connected to the corresponding I/O interface of the single chip microcomputer. Specifically, the type of the single chip microcomputer is STC89C52RC, of course, other types of single chip microcomputers can be adopted, a control program is written in the single chip microcomputer, so that the single chip microcomputer can adaptively control the managed energy storage device according to the numerical value of the difference value a, the type of the temperature and humidity sensor is DHT11, a 24V AC-to-DC power adapter is adopted in the AC/DC conversion circuit, a WRD2405-2W power module is adopted in the DC/DC conversion circuit, an LCD liquid crystal module in the prior art is included in the display circuit, display screens with different sizes are arranged according to different control devices of users, a clock, power consumption in a low valley period, real-time temperature and humidity and the like, an alarm and the like are mainly displayed, the wireless communication module adopts a WIFI module with the type of 8266-V1.3, a pin 6 of the ESP 66-V1.3 internet of things is connected with a pin 22 of STC89C52RC, pin 3 of an ESP8266-V1.3 Internet of things module is connected with pin 11 of an STC89C52RC single chip microcomputer, pin 4 of the ESP8266-V1.3 Internet of things module is connected with pin 22 of an STC89C52RC single chip microcomputer, a 4G or 5G network is used for receiving a difference value A instruction sent by a management platform to implement control, information of each user terminal (namely a power grid peak regulation controller II) is obtained, so that the management platform can conveniently build a power grid database, and meanwhile, clock information sent by a Beidou system is provided by the 4G or 5G network, so that the time consistency and the time reliability of the management platform and the power grid peak regulation controller II are ensured; a VS38KHz infrared receiving tube is adopted in the infrared remote control receiving circuit; the charging current control circuit is electrically connected with the single chip microcomputer and used for adjusting the charging current of the storage battery of the energy storage device, the charging voltage detection circuit is used for feeding back the battery voltage to the single chip microcomputer, the charging state of the storage battery is controlled through the relay inside the charging control circuit, and the running state of the mechanical energy storage device is also controlled through the relay inside the energy storage control circuit.
In one embodiment, the energy storage grid peak shaving system further comprises a mechanical energy storage device, the mechanical energy storage device comprising at least one of: a water tower water storage system, an air compressor air storage system and a water storage tank water storage system; taking water tower water storage system as an example, water tower water storage system utilizes the water pump to the eminence, in order to solve the not enough problem of water pressure, when water tower energy storage system needs the energy storage, the pin 21 of STC89C52RC singlechip exports the high level, Relay1 is in the high level, triode T9 switches on, Relay DZ 2Q 14F work starts the water pump of water tower and goes up water, as long as the water tower lacks water just start the water pump water supply, until the water tower is full of water, the pump is stopped.
Further, the energy storage device comprises at least one of: the energy-storing street lamp comprises an energy-storing street lamp, an electric vehicle, a solar power generation system with energy storage, a storage battery pack, a household reserve power supply and an office security power supply, wherein the electric vehicle comprises an electric vehicle, an electric bicycle and an electric bus. As shown in fig. 5, taking an electric vehicle as an example, connecting an electric vehicle battery to be charged with a power grid peak regulation controller II, when receiving a command of a difference value a and requiring charging, outputting a high level by a pin 17 of an STC89C52RC single chip microcomputer, conducting a triode T8 when a Relay2 is at the high level, and driving an external power Relay to charge the electric vehicle by a Relay DZ 1Q 14F; if the electric vehicle needs to be charged immediately, the electric vehicle starts to be charged immediately only by pressing the emergency button WLB1, and the charging is finished after the electric vehicle is charged. Taking a storage battery pack as an example, the storage battery pack is connected to a power grid peak regulation controller II, the voltage of the BV1 storage battery is sent to a pin 28 of an STC89C52RC single chip microcomputer by a charging voltage detection circuit after connection, and a charging program in the STC89C52RC single chip microcomputer calculates required charging current and charging time to charge the storage battery.
Further, as shown in fig. 9, the energy storage street lamp includes an ac/dc dual-purpose lamp and a storage battery, and the storage battery is electrically connected to the ac/dc dual-purpose lamp and the power grid peak shaving controller II. When the difference value A is positive, namely the real-time load is greater than the predicted load, the lamp is powered by the storage battery and is switched in from DC + and DC-, and the relay DZ1HH62P works because the direct-current impedance of the inductor L1 is small. Direct current DC + flows through a normally open contact 3-4 of a relay DZ1HH62P, is rectified in a bridge mode, flows through an LED lamp, returns to DC-through a normally closed contact 6-5 of the DZ1HH62P, and the lamp is lightened; therefore, the street lamp does not use the power grid to supply power during the peak time of the power grid, and uses the storage battery to supply power, thereby reducing the load during the peak time of the power grid. When the difference value A is negative, the lamp uses alternating current 220VAC commercial power, and a power supply 220V AC is accessed by LA and LN. Because inductance L1 alternating current impedance is very big, relay DZ1HH62P does not work, alternating current 220V power is connected to driver DPS1, the driver outputs direct current, OUT + flows through normally closed contact 2-3 of relay DZ1HH62P, through bridge rectification, lamps and lanterns, returns to OUT of driver DPS1 through normally closed contact 6-7 of DZ1HH62P, LED lamps and lanterns light, simultaneously, grid peak regulation controller II will also charge the battery, thus double the use commercial power of energy storage street lamp at the off-peak period of the grid.
Furthermore, the energy storage street lamp adopts an alternating current street lamp, a direct current street lamp and a storage battery, the storage battery is charged in the low-ebb period of the power grid, the power supply is provided for the street lamp by commercial power, and the alternating current street lamp and the direct current street lamp are powered by the storage battery in the non-low-ebb period of the power grid.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. Energy storage formula electric wire netting peak shaver system, its characterized in that: the system comprises a plurality of energy storage devices which are connected with a power grid and can be charged and supply power to the power grid in a reverse direction, power grid peak shaving controllers II which are connected with the energy storage devices one by one, and a management platform which is in bidirectional wireless connection with all the power grid peak shaving controllers II;
each power grid peak regulation controller II is provided with a unique ID code, all the ID codes are managed by a management platform in a unified grouping mode, the management platform receives a difference percentage difference value A of a difference value between a real-time load and a predicted load of a current power grid calculated by power grid dispatching and sends the difference percentage difference value A to the power grid peak regulation controller II, and the power grid peak regulation controller II charges energy storage equipment according to the priority of the ID codes and the grouping order under the instruction of the difference value A of the management platform to increase the power consumption of the power grid or feed back the electric quantity stored by the energy storage equipment to the power grid.
2. The energy storage type power grid peak shaving system according to claim 1, wherein: the ID code is composed of 16 digits, the first six digits represent an administrative division of an installation position of the power grid peak regulation controller II, the first three digits are accurate to a provincial division, the fourth-sixth digits are accurate to a county division, the seventh-eighth digits represent the starting year, the ninth digit represents the priority level of a user, the tenth digit represents a category item, and the eleventh-sixteenth digits automatically fill the charge quantity of the energy storage equipment corresponding to the low valley period and the electric quantity fed back to the power grid by the inverter after the power grid peak regulation controller II is put into use.
3. The energy storage type power grid peak shaving system according to claim 2, wherein: the priority levels comprise 10 levels which are respectively 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9, wherein the higher the capacity of the energy storage equipment is, the higher the priority is, and the 9 is the highest priority; the categories include five categories, namely 1-energy storage, 2-street lamp, 3-electric vehicle, 4-family and 5-security guard.
4. The energy storage type power grid peak shaving system according to claim 1, wherein: the management platform comprises a database, an operation module and a communication module, wherein accumulated data of daily, monthly, quarterly and annual power consumption, generated energy and feedback electric quantity of the energy storage equipment in a power supply area and the storage capacity of the energy storage equipment accessed to the management platform at present are stored in the database;
the operation module calculates the total capacity of the energy storage equipment to be installed according to the accumulated peak-to-valley difference average data, calculates the total storage capacity of all the energy storage equipment connected to the management platform according to the power storage amount of the energy storage equipment, calculates the power supply amount of a power grid required for fully filling all the energy storage equipment according to the total capacity and the total storage capacity, and calculates the inversion power amount capable of being fed back to the power grid according to the total storage capacity; the communication module also sends time information to the power grid peak regulation controller II.
5. The energy storage type power grid peak shaving system according to claim 1, wherein: the management platform continuously sends a difference value A to a power grid peak regulation controller II in a power grid valley period, the difference value A is provided by power grid dispatching, the power grid peak regulation controller II charges managed energy storage equipment according to priority, and all charging tasks are uniformly completed before the valley period is finished;
the management platform sends a difference value A to a power grid peak regulation controller II at a certain time interval during the ordinary time period of a power grid, and the power grid peak regulation controller II performs charging control on the energy storage equipment or reversely transmits power to the inversion of the power grid according to the energy storage condition of the energy storage equipment managed by the power grid peak regulation controller II;
the management platform sends a difference value A to a power grid peak regulation controller II at a certain time interval during a power grid peak period, the power grid peak regulation controller II inverts the stored electric quantity of the managed energy storage equipment into electric quantity reversely transmitted by a power grid according to the priority, and at least 70% of the electric quantity of the storage battery is uniformly released to complete a reverse power transmission task before the peak period is finished.
6. The energy storage type power grid peak shaving system according to claim 1, wherein: the power grid peak regulation controller II is in modular design and comprises a mainboard circuit module, a power supply circuit module, a display circuit, a wireless communication interface circuit and a power output circuit; the main board circuit module comprises a single chip microcomputer, a temperature and humidity sensor and an infrared remote control receiving circuit; the power supply circuit module comprises an AC/DC conversion circuit and a DC/DC conversion circuit, the display circuit comprises a display module, the wireless communication interface circuit comprises a wireless communication module, and the power output circuit comprises a charging current control circuit, a charging voltage detection circuit, a charging control circuit, an energy storage control circuit and a wiring terminal row; the temperature and humidity sensor, the display module, the wireless communication interface circuit, the charging control circuit, the energy storage control circuit and the wiring terminal strip are respectively and electrically connected to the corresponding I/O interface of the single chip microcomputer.
7. The energy storage type power grid peak shaving system according to claim 1, wherein: the energy storage device also comprises a mechanical energy storage device, wherein the mechanical energy storage device at least comprises one of the following components: the system comprises a water tower water storage system, an air compressor air storage system and a water storage tank water storage system.
8. The energy storage type power grid peak shaving system according to claim 1, wherein: the energy storage device comprises at least one of: the energy-storing street lamp comprises an energy-storing street lamp, an electric vehicle, a solar power generation system with energy storage, a storage battery pack, a household reserve power supply and an office security power supply, wherein the electric vehicle comprises an electric vehicle, an electric bicycle and an electric bus.
9. The energy storage grid peak shaving system according to claim 8, wherein: the energy storage street lamp comprises an alternating current/direct current dual-purpose lamp and a storage battery, and the storage battery is electrically connected with the alternating current/direct current dual-purpose lamp and the power grid peak regulation controller II.
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