CN111720884B - Off-peak electricity application control method for carbon fiber electric heating and off-peak electricity energy storage system - Google Patents
Off-peak electricity application control method for carbon fiber electric heating and off-peak electricity energy storage system Download PDFInfo
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- CN111720884B CN111720884B CN202010594719.8A CN202010594719A CN111720884B CN 111720884 B CN111720884 B CN 111720884B CN 202010594719 A CN202010594719 A CN 202010594719A CN 111720884 B CN111720884 B CN 111720884B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
Abstract
The invention provides a valley power application control method and a valley power energy storage system for carbon fiber electric heating. The invention has the beneficial effects that: the invention makes full use of the valley electricity for heating, reduces the heating cost and balances the load of the power grid.
Description
Technical Field
The invention relates to the technical field of heat supply control, in particular to a carbon fiber electric heating off-peak electricity application control method and an off-peak electricity energy storage system.
Background
With the development of national economy and the improvement of living standard, the demand on electricity is more and more increased, and the contradiction between peak-valley electric energy is continuously increased while the installed capacity is enlarged, new energy is actively developed and the problem of electricity shortage is solved by the power department, so that the safety of national power grids and the economic benefit of power generation enterprises are seriously influenced.
The valley electricity energy storage is an effective measure for balancing the load of the power grid and comprehensively exerting power resources. The state has already advocated using low-ebb electricity energy storage to solve the high energy consumption and high pollution problems in the heating industry, and has come out a series of relevant preferential policies, trying to strengthen price adjustment and guide peak clipping and valley filling through reasonable clause energy structure. In recent years, the national development and improvement committee is constantly ordering to enlarge the difference of peak-valley electricity prices, float up the peak electricity prices and float down the valley electricity prices. Under the support of a series of government policies, valley electricity energy storage technology and equipment are developed and popularized, and the method has profound significance for providing economic clean energy for heating in cities.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: carbon fiber electricity heating's millet electricity energy storage system heats phase change material through carbon fiber heating cable at the millet electricity period, and phase change material carries out the heat accumulation through the form of phase transition, releases heat and heats at flat electricity and peak electricity period. According to the invention, through a series of control methods, valley electricity is fully utilized during heat storage, flat electricity utilization is reduced, peak electricity utilization is avoided, and the lowest heating cost is realized under the condition of meeting comfortable heating temperature.
The invention provides a valley electricity energy storage system for carbon fiber electric heating, which comprises a carbon fiber heating unit, a carbon fiber heat storage unit, a carbon fiber controller, a collector, a server and a client, wherein the carbon fiber heating unit is embedded in the carbon fiber heat storage unit and is connected with the carbon fiber controller, the carbon fiber controller is connected with the collector, the collector is connected with the server, and the server is in communication connection with the client;
the carbon fiber heating unit is used for converting electric energy into heat energy and heating the carbon fiber heat storage unit; the carbon fiber heat storage unit is used for storing converted heat energy and supplying heat to the indoor space; the carbon fiber controller is used for collecting indoor temperature and controlling a power supply of the carbon fiber heating unit according to a set heating time period and a heating temperature parameter; the collector is a data transmission channel, uploads the data collected by the carbon fiber controller to the server, and issues the command of the server to the carbon fiber controller; the server is used for storing and analyzing data, deciding related control parameters and providing related services for data interaction of the client; the client provides a man-machine interaction interface for the operation and data display of the user.
As a further improvement of the invention, the carbon fiber heating unit is connected with the carbon fiber controller by a cable, the carbon fiber controller is wirelessly connected with the collector by LoRa, the collector is connected with the server by 4G, and the server is communicated with the client through Internet.
As a further improvement of the invention, the carbon fiber heating unit consists of a heat insulation layer, a reflection layer, a grounding net and a carbon fiber heating wire, the carbon fiber heat storage unit consists of a heat storage layer and a surface layer, the heat insulation layer is tiled on a ground base layer, the reflection layer is tiled on the heat insulation layer, the grounding net is tiled on the reflection layer, the carbon fiber heating wire is fixed on the grounding net according to a certain distance, the heat storage layer is paved on the grounding net, the carbon fiber heating wire is embedded in the heat storage layer, and the surface layer is paved on the heat storage layer.
As a further improvement of the invention, the server predicts the heating time length during the valley power period, decides the heating start-stop time by combining the valley power period parameter, and sends the decided parameter to the control carbon fiber controller, and the carbon fiber controller controls the power supply of the carbon fiber heating unit to store heat, so that the carbon fiber heat storage unit reaches the maximum heat storage amount Qmax at the valley power cut-off time point, and the unit is kWh.
As a further improvement of the invention, the server predicts the heat supply duration during the flat charging period, and decides whether to supplement heat storage during the flat charging period by combining the flat charging period and the peak charging period parameters, and sends the decided parameters to the control carbon fiber controller, and the carbon fiber controller controls the on-off of the power supply of the carbon fiber heating unit, so that the heat storage energy of the carbon fiber heat storage unit at the valley charging starting time point T4 is completely used up, that is, the minimum heat storage amount Qmin kWh is reached, and the heat energy stored in the carbon fiber heat storage unit is fully utilized.
As a further improvement of the present invention, during the period from the peak electricity start time point to the peak electricity stop time point, the carbon fiber heat storage unit does not store heat less than the minimum heat storage amount Qmin without heating, that is, the stored heat can be operated for the entire peak electricity period.
The invention also provides a valley power application control method for carbon fiber electric heating, which comprises the following steps:
step 1: measuring the indoor temperature, judging whether the indoor temperature exceeds the set indoor temperature, if so, turning off heating, and if not, judging the valley power time period;
step 2: performing a valley power period processing step if the current time is within a valley power period; performing a off-valley period processing step if the current time is in an off-valley period;
the valley electricity time period processing step comprises the following steps:
step A1: predicting the heat storage amount in the carbon fiber heat storage unit, and predicting the heating time duration s1 according to the heating power of the carbon fiber heating unit 11 and the dissipation power of the house;
step A2: in the valley electricity time period, if the predicted time exceeds the valley electricity time period, heating is started immediately for heat storage; if the predicted time does not exceed the valley power time period, controlling whether to heat or not according to whether the predicted time is lower than the lower temperature limit or not;
the off-valley electricity period processing step comprises the following steps:
step B1: in the off-peak electricity period, predicting the current available heat storage quantity Q in the carbon fiber heat storage unit, and predicting the available heat supply time length s2 according to the dissipation power of the house;
step B2: if the current time is in the peak power period, controlling whether to heat according to whether the current time is lower than the lower temperature limit; if the current time is not in the peak electricity time period, judging whether peak electricity can be staggered according to the predicted heat supply time length s2, if the peak electricity cannot be staggered, executing the processing step that the peak electricity cannot be staggered, and if the peak electricity can be staggered, executing the processing step that the peak electricity is staggered;
peak power cannot stagger the processing steps: if the peak electricity can not be staggered, predicting the heating time period s3 required by avoiding the peak electricity, determining whether to start the avoiding peak electricity heating according to the current time and the predicted avoiding peak electricity heating time period s3, directly starting the heating if the avoiding peak electricity heating is required, and otherwise, controlling whether the temperature is lower than the lower limit of the temperature or not;
the peak electric staggering processing step comprises:
step C1: if the current time is not in the peak power period and the peak power can be avoided, judging whether the heat can be continuously supplied to the beginning of the next valley power period or not according to the predicted heat supply time length s2, and if the heat can be continuously supplied to the beginning of the next valley power period, controlling whether the heat is supplied or not according to whether the temperature is lower than the lower limit or not; if the heat supply cannot be continuously carried out until the next valley electricity time interval begins, predicting a heating time period s4 for continuously supplying heat to the next valley electricity beginning, and then executing a step C2;
step C2: judging whether the continuous heating exceeds the maximum heat storage amount, if so, performing segmented processing on the heating time period, and if not, executing a step C3; during the sectional treatment, the heat storage amount is required to reach the maximum heat storage amount Qmax during heat storage, and the heat storage amount is required to be close to the minimum heat storage amount Qmin during heat release so as to reduce the phase change times of the phase change material;
step C3: according to the predicted heating time length s4, distributing a heating time period, and determining whether to start heating according to the heating time period; if the heating is needed, the heating is directly started, otherwise, the heating is controlled according to whether the temperature is lower than the lower limit.
As a further development of the invention, s1 ═ [ (Δ Q-Q) + P2 × tg ] ÷ P1, where Δ Q is the maximum available heat storage amount in kWh and Δ Q is the difference between the maximum heat storage amount Qmax and the minimum heat storage amount Qmin; q is the current available heat storage capacity of the carbon fiber heat storage unit, tg is the duration from the current time to the current off-peak period ending time point, and P1 is the heating power of the carbon fiber heating unit, and the unit is kW; p2 is the building dissipation power in kW;
s2＝Q÷P2；
s3 ═ P2 × tf-Q ÷ P1, where tf is the duration from the current time to the most recent peak-power period cut-off time point;
s4 ═ P2 × tk-Q ÷ P1, where tk is the duration from the current time to the nearest valley electricity period start time point.
As a further improvement of the invention, the heating period is segmented as P2 × tk + Q > Δ Q.
As a further improvement of the invention, during the heating process, the same time point from the time of entering the valley power to the next day is a calculation period, the total heating time is t1 and is h, and the total heat release time is t2 and is h, wherein Q is P1 × t 1-P2 × t 2.
The invention has the beneficial effects that: the invention makes full use of the valley electricity for heating, reduces the heating cost and balances the load of the power grid.
Drawings
Fig. 1 is a schematic diagram of a valley power energy storage system of the present invention;
FIG. 2 is a schematic view of a carbon fiber heating unit and a carbon fiber thermal storage unit of the present invention;
FIG. 3 is a schematic of the heat storage versus time node of the present invention;
fig. 4 is a heating control logic diagram of the present invention.
Detailed Description
As shown in fig. 1, the invention discloses a valley power energy storage system for carbon fiber electric heating, which comprises a carbon fiber heating unit 11, a carbon fiber heat storage unit 12, a carbon fiber controller 13, a collector 14, a server 15 and a client 16, wherein the carbon fiber heating unit 11 is embedded in the carbon fiber heat storage unit 12, the carbon fiber heating unit 11 is connected with the carbon fiber controller 13 through a cable, the carbon fiber controller 13 is wirelessly connected with the collector 14 through LoRa, the collector 14 is connected with the server 15 through 4G, and the server 15 is communicated with the client 16 through Internet.
The carbon fiber heating unit 11 is used for converting electric energy into heat energy to heat the carbon fiber heat storage unit 12. The carbon fiber heat storage unit 12 is used for storing the converted heat energy and supplying heat to the indoor space. The carbon fiber controller 13 is used for collecting indoor temperature and controlling the power supply of the carbon fiber heating unit 11 according to parameters such as set heating time interval and heating temperature. The collector 14 is a data transmission channel, and uploads the data collected by the carbon fiber controller 13 to the server 15, and issues the command of the server 15 to the carbon fiber controller 13. The server 15 is used for storing and analyzing data, deciding related control parameters and providing related services for data interaction of the client 16. The client 6 provides a human-computer interaction interface for user operation, data display and the like.
As shown in fig. 2, the carbon fiber heating unit 11 is composed of a heat insulating layer 22, a reflective layer 23, a ground net 24, and a carbon fiber heating wire 25. The carbon fiber heat storage unit 12 is composed of a heat storage layer 26 and a surface layer 27. The heat insulation layer 22 tiles on the ground basic layer 21, the reflection layer 23 tiles on the heat insulation layer 22, the grounding grid 24 tiles on the reflection layer 23, the carbon fiber heating wire 25 is fixed on the grounding grid 24 according to a certain distance, the heat storage layer 26 is laid on the grounding grid 24, the carbon fiber heating wire 25 is embedded in the heat storage layer 26, and the surface layer 27 is laid on the heat storage layer 26.
The low-temperature phase-change material with the phase-change temperature of 26-30 ℃ is adopted, encapsulated into capsule particles, and the capsule particles are filled in concrete and used for paving a heat storage layer 26.
And establishing a heat storage and release model, and taking a natural day as an energy storage and release period. A natural day is divided into a plurality of time intervals according to power consumption peak, low valley and the like and the power price grade defined by a power department, and the time intervals are respectively defined as a peak power interval, a flat power interval and a valley power interval according to the power price from high to low. For convenience of description, one valley power period and one peak power period are exemplified as shown in fig. 3. A period after the valley power start time point T4 and before the valley power off time point T1 on the previous day is a valley power period; a period after the peak electricity start time point T2 and before the peak electricity off time point T3 is a peak electricity period; a period after the valley power-off time point T1 and before the peak power start time point T2 is a flat period; the period after the peak power off time point T3 and before the valley power start time point T4 is the flat period.
The server 15 predicts the heating duration during the valley power period, decides the heating start-stop time by combining the valley power period parameters, and sends the decided parameters to the control carbon fiber controller 13. The carbon fiber controller 13 controls the power supply of the carbon fiber heating unit 11 to store heat such that the carbon fiber heat storage unit 12 reaches the maximum heat storage amount Qmax in kWh at the valley power off time point T1.
The server 15 predicts the heat supply duration during the flat charging period, decides whether to supplement heat storage during the flat charging period by combining parameters such as the flat charging period and the peak charging period, and sends the decided parameters to the control carbon fiber controller 13. The carbon fiber controller 13 controls the on/off of the power supply of the carbon fiber heating unit 11, and firstly ensures that the heat stored in the carbon fiber heat storage unit 12 at the valley power starting time point T4 is completely used up, namely, the minimum heat storage amount Qmin is achieved, and the unit is kWh, so that the heat stored in the carbon fiber heat storage unit 12 is fully utilized.
Secondly, it is ensured that the carbon fiber heat storage unit 12 does not store heat less than the minimum heat storage amount Qmin without heating during the period from the peak power start time point T2 to the peak power cut-off time point T3, that is, the stored heat can be supplied for the entire peak power period.
The heating power P1 of the carbon fiber heating unit 11 is obtained in kW, and the building dissipation power P2 is obtained in kW. The current available heat storage amount of the carbon fiber heat storage unit 12 is obtained as Q in kWh, the maximum available heat storage amount Δ Q in kWh, and the maximum available heat storage amount Δ Q is the difference between the maximum heat storage amount Qmax and the minimum heat storage amount Qmin.
In the heating process, the same time point from the time of entering the valley electricity to the next day is a calculation period, the total heating time is t1 and is h, the total heat release time is t2 and is h, wherein Q is P1 × t 1-P2 × t 2.
Let the predicted heating-required time period s1 be h, that is, the time from the current time to the time at which the carbon fiber heat storage unit 12 reaches the maximum heat storage amount Qmax, and the time period from the current time to the current valley period end time point be tg, which is h, s1 ═ [ (Δ Q-Q) + P2 × tg ] ÷ P1.
The available heat supply time period s2 is predicted in units of h, that is, the time from the present time when the carbon fiber heat storage unit 12 reaches the minimum heat storage amount Qmin by heat release without heating, s2 being Q ÷ P2.
The predicted time length s3 for reheating to avoid peak electricity is h, the time length from the current time to the latest peak electricity cut-off time point is tf, and the unit is h, and s3 is (P2 × tf-Q) ÷ P1.
Predicting the time length s4 of reheating from the next valley electricity start, wherein the unit is h, the time length from the current time to the starting time point of the latest valley electricity period is tk, and the unit is h, and s4 is (P2 × tk-Q) ÷ P1. If P2 × tk + Q > Δ Q, the heating period is divided into segments.
As shown in fig. 4, the invention also discloses a valley power application control method for carbon fiber electric heating, which comprises the following steps:
step 1: and measuring the indoor temperature, judging whether the indoor temperature exceeds the set indoor temperature, if so, turning off heating, and if not, judging the valley power time period.
Step 2: performing a valley power period processing step if the current time is within a valley power period; if the current time is in the off-valley period, then the off-valley period processing step is performed.
The valley electricity time period processing step comprises the following steps:
step A1: the amount of heat stored in the carbon fiber heat storage unit 12 is predicted, and the heating time period s1 is predicted based on the heating power of the carbon fiber heating unit 11 and the dissipated power of the house.
Step A2: in the valley electricity time period, if the predicted time exceeds the valley electricity time period, heating is started immediately for heat storage; and if the predicted time does not exceed the valley power period, controlling whether to heat according to whether the temperature is lower than the lower limit.
The off-valley electricity period processing step comprises the following steps:
step B1: during off-peak electricity periods, the currently available stored heat Q within the carbon fiber thermal storage unit 12 is predicted, and the available heat supply time period s2 is predicted from the house's dissipated power.
Step B2: if the current time is in the peak power period, controlling whether to heat according to whether the current time is lower than the lower temperature limit; and if the current time is not in the peak electricity time period, judging whether the peak electricity can be staggered according to the predicted heat supply time length s2, if the peak electricity cannot be staggered, executing the processing step that the peak electricity cannot be staggered, and if the peak electricity can be staggered, executing the processing step that the peak electricity is staggered.
Peak power cannot stagger the processing steps: if the peak power can not be staggered, predicting the heating time period s3 required by avoiding the peak power, determining whether to start the avoiding peak power heating according to the current time and the predicted avoiding peak power heating time period s3, directly starting the heating if the avoiding peak power heating is required, and otherwise, controlling whether the temperature is lower than the lower limit of the temperature or not.
The peak electric staggering processing step comprises:
step C1: if the current time is not in the peak power period and the peak power can be avoided, judging whether the heat can be continuously supplied to the beginning of the next valley power period or not according to the predicted heat supply time length s2, and if the heat can be continuously supplied to the beginning of the next valley power period, controlling whether the heat is supplied or not according to whether the temperature is lower than the lower limit or not; if the heat supply cannot be continuously carried out to the beginning of the next valley power period, the heating time period s4 for continuously supplying heat to the beginning of the next valley power period is predicted, and then the step C2 is executed.
Step C2: judging whether the continuous heating exceeds the maximum heat storage amount, if so, performing segmented processing on the heating time period, and if not, executing a step C3; during the sectional treatment, the heat storage amount reaches the maximum heat storage amount Qmax during heat storage, and the heat storage amount approaches the minimum heat storage amount Qmin during heat release so as to reduce the phase change times of the phase change material.
Step C3: according to the predicted heating time length s4, distributing a heating time period, and determining whether to start heating according to the heating time period; if the heating is needed, the heating is directly started, otherwise, the heating is controlled according to whether the temperature is lower than the lower limit.
The invention makes full use of the valley electricity for heating, reduces the heating cost and balances the load of the power grid.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. The valley electricity energy storage system for carbon fiber electric heating is characterized by comprising a carbon fiber heating unit (11), a carbon fiber heat storage unit (12), a carbon fiber controller (13), a collector (14), a server (15) and a client (16), wherein the carbon fiber heating unit (11) is embedded in the carbon fiber heat storage unit (12), the carbon fiber heating unit (11) is connected with the carbon fiber controller (13), the carbon fiber controller (13) is connected with the collector (14), the collector (14) is connected with the server (15), and the server (15) is in communication connection with the client (16);
the carbon fiber heating unit (11) is used for converting electric energy into heat energy and heating the carbon fiber heat storage unit (12); the carbon fiber heat storage unit (12) is used for storing converted heat energy and supplying heat to the indoor space; the carbon fiber controller (13) is used for collecting indoor temperature and controlling a power supply of the carbon fiber heating unit (11) according to a set heating time period and a heating temperature parameter; the collector (14) is a data transmission channel, uploads the data collected by the carbon fiber controller (13) to the server (15), and issues the command of the server (15) to the carbon fiber controller (13); the server (15) is used for storing and analyzing data, deciding related control parameters and providing related services for data interaction of the client (16); the client (16) provides a human-computer interaction interface for the operation and data display of a user;
the carbon fiber heating unit (11) is composed of a heat insulation layer (22), a reflection layer (23), a grounding net (24) and carbon fiber heating wires (25), the carbon fiber heat storage unit (12) is composed of a heat storage layer (26) and a surface layer (27), the heat insulation layer (22) is tiled on a ground base layer (21), the reflection layer (23) is tiled on the heat insulation layer (22), the grounding net (24) is tiled on the reflection layer (23), the carbon fiber heating wires (25) are fixed on the grounding net (24) according to a certain distance, the heat storage layer (26) is paved on the grounding net (24), the carbon fiber heating wires (25) are embedded in the heat storage layer (26), and the surface layer (27) is paved on the heat storage layer (26);
encapsulating a low-temperature phase-change material with the phase-change temperature of 26-30 ℃ into capsule particles, filling the capsule particles into concrete and paving a heat storage layer (26);
the valley electricity energy storage system also comprises the following operation steps:
step 1: measuring the indoor temperature, judging whether the indoor temperature exceeds the set indoor temperature, if so, turning off heating, and if not, judging the valley power time period;
step 2: performing a valley power period processing step if the current time is within a valley power period; performing a off-valley period processing step if the current time is in an off-valley period;
the valley electricity time period processing step comprises the following steps:
step A1: predicting the heat storage amount in the carbon fiber heat storage unit (12), and predicting the heating time s1 according to the heating power of the carbon fiber heating unit (11) and the dissipation power of the house;
step A2: in the valley electricity time period, if the predicted time exceeds the valley electricity time period, heating is started immediately for heat storage; if the predicted time does not exceed the valley power time period, controlling whether to heat or not according to whether the predicted time is lower than the lower temperature limit or not;
the off-valley electricity period processing step comprises the following steps:
step B1: predicting the current available heat storage quantity Q in the carbon fiber heat storage unit (12) in the off-peak electricity period, and predicting the available heat supply time length s2 according to the dissipation power of the house;
step B2: if the current time is in the peak power period, controlling whether to heat according to whether the current time is lower than the lower temperature limit; if the current time is not in the peak electricity time period, judging whether peak electricity can be staggered according to the predicted heat supply time length s2, if the peak electricity cannot be staggered, executing the processing step that the peak electricity cannot be staggered, and if the peak electricity can be staggered, executing the processing step that the peak electricity is staggered;
peak power cannot stagger the processing steps: if the peak electricity can not be staggered, predicting the heating time period s3 required by avoiding the peak electricity, determining whether to start the avoiding peak electricity heating according to the current time and the predicted avoiding peak electricity heating time period s3, directly starting the heating if the avoiding peak electricity heating is required, and otherwise, controlling whether the temperature is lower than the lower limit of the temperature or not;
the peak electric staggering processing step comprises:
step C1: if the current time is not in the peak power period and the peak power can be avoided, judging whether the heat can be continuously supplied to the beginning of the next valley power period or not according to the predicted heat supply time length s2, and if the heat can be continuously supplied to the beginning of the next valley power period, controlling whether the heat is supplied or not according to whether the temperature is lower than the lower limit or not; if the heat supply cannot be continuously carried out until the next valley electricity time interval begins, predicting a heating time period s4 for continuously supplying heat to the next valley electricity beginning, and then executing a step C2;
step C2: judging whether the continuous heating exceeds the maximum heat storage amount, if so, performing segmented processing on the heating time period, and if not, executing a step C3; during the sectional treatment, the heat storage amount is required to reach the maximum heat storage amount Qmax during heat storage, and the heat storage amount is required to be close to the minimum heat storage amount Qmin during heat release so as to reduce the phase change times of the phase change material;
step C3: according to the predicted heating time length s4, distributing a heating time period, and determining whether to start heating according to the heating time period; if the heating is needed, the heating is directly started, otherwise, the heating is controlled according to whether the temperature is lower than the lower limit.
2. The valley electricity energy storage system according to claim 1, wherein the carbon fiber heating unit (11) is connected with the carbon fiber controller (13) through a cable, the carbon fiber controller (13) is wirelessly connected with the collector (14) through LoRa, the collector (14) is connected with the server (15) through 4G, and the server (15) is communicated with the client (16) through Internet.
3. The valley power energy storage system according to claim 1, characterized in that the server (15) predicts the heating time duration during the valley power period, decides the heating start-stop time in combination with the valley power period parameter, and sends the decided parameter to the control carbon fiber controller (13), and the carbon fiber controller (13) controls the power supply of the carbon fiber heating unit (11) to store heat, so that the carbon fiber heat storage unit (12) reaches the maximum heat storage amount Qmax in kWh at the valley power-off time point.
4. The valley power energy storage system according to claim 3, characterized in that the server (15) predicts the heat supply duration during the flat charging period, decides whether to supplement heat storage during the flat charging period by combining the flat charging period and the peak charging period parameters, and sends the decided parameters to the control carbon fiber controller (13), wherein the carbon fiber controller (13) controls the on-off of the power supply of the carbon fiber heating unit (11), so as to firstly ensure that the heat storage energy of the carbon fiber heat storage unit (12) at the valley power starting time point T4 is completely used up, namely the minimum heat storage amount Qmin is reached, the unit is kWh, and the heat energy stored in the carbon fiber heat storage unit (12) is fully utilized.
5. The valley power energy storage system according to claim 4, characterized in that the carbon fiber heat storage unit (12) has a stored heat amount not less than the minimum stored heat amount Qmin, i.e., the stored heat amount is operable for the entire peak power period, without heating, during the period from the peak power start time point to the peak power off time point.
6. The valley power energy storage system according to claim 1, wherein s1 ═ [ (Δ Q-Q) + P2 × tg ] ÷ P1, where Δ Q is the maximum available stored heat in kWh, and Δ Q is the difference between the maximum stored heat Qmax and the minimum stored heat Qmin; q is the current available heat storage capacity of the carbon fiber heat storage unit (12), tg is the time length from the current time to the current valley period ending time point, and P1 is the heating power of the carbon fiber heating unit (11) and has the unit of kW; p2 is the building dissipation power in kW;
s2＝Q÷P2；
s3 ═ P2 × tf-Q ÷ P1, where tf is the duration from the current time to the most recent peak-power period cut-off time point;
s4 ═ P2 × tk-Q ÷ P1, where tk is the duration from the current time to the nearest valley electricity period start time point.
7. The valley power energy storage system according to claim 6, wherein the heating period is segmented if P2 x tk + Q > Δ Q.
8. The valley power energy storage system according to claim 7, wherein during heating, the same time point from the time of entering the valley power to the next day is a calculation period, the total heating time is t1 and is h, the total heat release time is t2 and is h, and Q is P1 x t 1-P2 x t 2.
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