CN209860603U - User side battery energy storage system for variable electricity price mechanism - Google Patents
User side battery energy storage system for variable electricity price mechanism Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 139
- 230000007246 mechanism Effects 0.000 title claims abstract description 87
- 230000005611 electricity Effects 0.000 title claims abstract description 85
- 238000004891 communication Methods 0.000 claims abstract description 54
- 238000007599 discharging Methods 0.000 claims abstract description 34
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 4
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 claims description 4
- 229910001416 lithium ion Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 description 14
- 230000004044 response Effects 0.000 description 9
- 230000002452 interceptive effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The utility model discloses a user side battery energy storage system towards changeable electrovalence mechanism, include: the communication terminal is connected with the power grid equipment and used for acquiring a multi-period electricity price mechanism; the battery energy storage equipment is positioned at the user side; and the processor is connected with the communication terminal and the battery energy storage device and is used for controlling the battery energy storage device to operate in a charging and discharging mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism. According to the technical scheme, the battery energy storage equipment can operate in the charging and discharging modes corresponding to the electricity price mechanism under different electricity price mechanisms through the communication terminal and the processor, so that the battery energy storage equipment can not be limited to a certain fixed charging and discharging mode any more, and the charging and discharging flexibility of the battery energy storage equipment located on the user side is improved.
Description
Technical Field
The utility model relates to a battery energy storage technical field, more specifically say, relate to a user side battery energy storage system towards changeable price of electricity mechanism.
Background
The user side battery energy storage device mainly refers to an electrochemical storage device which is located near a user and mainly consumes generated energy on site and can store, convert and release electric energy. And viewed from the power grid side, the battery energy storage at the user side is positioned at the user side of the user and the power grid gateway metering meter and belongs to user assets.
At present, the existing user-side battery energy storage equipment is limited by a current relatively rigid peak-valley electricity price mechanism, and only can perform single charge-discharge circulation, that is, the existing user-side battery energy storage equipment can only operate in a fixed charge-discharge mode, so that the problem of insufficient charge-discharge flexibility exists.
In summary, how to improve the flexibility of charging and discharging of the battery energy storage device on the user side is a technical problem to be urgently solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a user side battery energy storage system towards changeable price of electricity mechanism to improve user side battery energy storage equipment's flexibility.
In order to achieve the above object, the present invention provides the following technical solutions:
a multi-tariff mechanism oriented user-side battery energy storage system, comprising:
the communication terminal is connected with the power grid equipment and used for acquiring a multi-period electricity price mechanism;
the battery energy storage equipment is positioned at the user side;
and the processor is connected with the communication terminal and the battery energy storage device and is used for controlling the battery energy storage device to operate in a charging and discharging mode corresponding to each electricity price mechanism in the multi-period electricity price mechanism.
Preferably, the method further comprises the following steps:
the first intelligent electric meter is arranged at a grid connection point of the battery energy storage equipment and connected with the processor;
and the second intelligent electric meter is arranged at a public connection point of the user side and the superior power grid and is connected with the processor.
Preferably, the first smart electric meter and the processor, the second smart electric meter and the processor, the power grid equipment and the communication terminal, the communication terminal and the processor, and the processor and the battery energy storage equipment are connected through communication cables.
Preferably, the first smart electric meter is connected with the processor, the second smart electric meter is connected with the processor, the power grid equipment is connected with the communication terminal, the communication terminal is connected with the processor, and the processor is connected with the battery energy storage equipment through wireless communication modules.
Preferably, the battery energy storage device is a sodium-sulfur battery device.
Preferably, the battery energy storage device is a lithium ion battery device.
Preferably, the method further comprises the following steps: a display device coupled to the processor.
Preferably, the display device is an LED display screen.
The utility model provides a user side battery energy storage system towards changeable electrovalence mechanism, include: the communication terminal is connected with the power grid equipment and used for acquiring a multi-period electricity price mechanism; the battery energy storage equipment is positioned at the user side; and the processor is connected with the communication terminal and the battery energy storage device and is used for controlling the battery energy storage device to operate in a charging and discharging mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism.
According to the technical scheme, the communication terminal connected with the power grid equipment is arranged, the processor connected with the communication terminal and the battery energy storage equipment is arranged, the battery energy storage equipment is controlled to operate in the charging and discharging mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism through the processor, namely, the battery energy storage equipment can respectively operate in the charging and discharging mode corresponding to the electricity price mechanism through the communication terminal and the processor, the battery energy storage equipment can not be limited to a certain fixed charging and discharging mode, and therefore the charging and discharging flexibility of the battery energy storage equipment located on the user side is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a user-side battery energy storage system for a multiple electricity price mechanism according to an embodiment of the present invention;
fig. 2 is a schematic view of peak-valley electricity prices provided by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, it shows a schematic structural diagram of a user-side battery energy storage system for a multiple electricity price mechanism according to an embodiment of the present invention, which may include:
the communication terminal 2 is connected with the power grid equipment 1 and used for acquiring a multi-period electricity price mechanism;
a battery energy storage device 3 located at the user side;
and the processor 4 is connected with the communication terminal 2 and the battery energy storage device 3 and is used for controlling the battery energy storage device 3 to operate in a charging and discharging mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism.
It should be noted that a typical application scenario of the user-side battery energy storage system for the variable electricity price mechanism is an industrial park, and the battery energy storage device 3 may be built by using idle site resources of an industrial user, and of course, may also be applied to other application scenarios. In the present application, an application scenario is taken as an example of an industrial park.
The user-side battery energy storage system facing the multi-variable electricity price mechanism can comprise a communication terminal 2 connected with a power grid device 1 in a power grid enterprise, a battery energy storage device 3 located on the user side, and a processor 4 connected with the communication terminal 2 and the battery energy storage device 3. The communication terminal 2 is configured to obtain user electricity price information (time-of-use electricity price, real-time electricity price, and the like) of a location of a project from a power grid device 1 of a power grid enterprise, specifically, an electricity price per unit time of a day (that is, a multi-period electricity price mechanism), and send the obtained multi-period electricity price mechanism to the processor 4; the battery energy storage device 3 converts the electric energy that is difficult to be directly stored into other forms of easily stored energy (such as chemical energy) and stores the energy, and reversely converts the energy into electric energy for the user to use in a required period, wherein the operation of the battery energy storage device 3 includes two processes of charging and discharging: the charging process can be equivalent to an electric load, the discharging process can be equivalent to a power supply, and the charging and discharging time periods are controlled by the processor 4 to be matched with a multi-time-period electricity price mechanism, so that the operation flexibility of the battery energy storage device 3 is improved; the processor 4 obtains a charge-discharge mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism according to the pre-stored capacity configuration of the battery energy storage device 3 and the received multi-time-period electricity price mechanism, and controls the battery energy storage device 3 to operate in the charge-discharge mode corresponding to the electricity price mechanism of each time period in the electricity price mechanism of each time period. When the processor 4 obtains the charge and discharge mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism, the charge and discharge mode corresponding to the electricity price mechanism of each time period may be specifically selected on the basis of the highest economy of the charge and discharge mode, and the specific process is as follows:
(1) after the battery energy storage device 3 is put into operation and before the battery energy storage device 3 is overhauled or scrapped, the processor 4 calculates the daily maximum charging and discharging times according to the capacity configuration and the multi-period electricity price mechanism of the battery energy storage device 3, and the detailed calculation process is as follows:
step 1: a peak to valley electricity price diagram is plotted as shown in fig. 2. Generally, the current peak-valley electricity price mechanism at least comprises 3 segmented electricity prices of a peak segment, a flat segment and a valley segment (of course, the scheme is also suitable for a thinner dividing policy), and in 24 hours a day, the electricity prices are not in long time periods (t is respectively used for t)1-t6Representing hours per time period) of the electricity rates of the industrial users, the number of electricity rate ascending steps in 24 hours a day can be determined according to fig. 2, in particular as indicated by the dashed circle e in fig. 21-e3Shown (of course, not limited to 3 steps, the present solution is also applicable to the case with a more detailed division policy, in fig. 2, the ith power rate increase step eiCorresponding to two time periods tiAnd ti+1)。
Step 2: according to the capacity configuration of the battery energy storage device 3, the time of single charge or discharge is calculated, and the specific calculation formula is as follows:wherein, TBessThe time for charging or discharging the battery energy storage device 3 in a single time in the industrial park is represented by h; sBessThe unit of the capacity of the battery energy storage equipment 3 in the industrial park is MWh; pBessRepresents the rated power of the battery energy storage device 3 in the industrial park in MW.
And step 3: and determining the daily maximum charge-discharge cycle number of the battery energy storage equipment 3 in the industrial park. Judging whether each step is satisfied or not on the basis of each power price rising step determined in the step 1Wherein, the number of power rate increase steps satisfying the constraint of formula (2) is the maximum daily charge-discharge cycle number of the battery energy storage device 3 in the industrial park. In formula (2), tkFor two repeated periods of consecutive power price ascending steps, in such a period, the battery energy storage device 3 should complete the discharging step in the previous step period and perform the charging step in the next step period, as shown by t in fig. 22A time period.
Taking the peak-to-valley electricity price shown in fig. 2 as an example, assuming that the battery energy storage device 3 is constructed in a certain industrial park in the place and the capacity is configured to be 0.5MW/1MWh, all possible charge-discharge modes can be obtained according to the above steps, as shown in table 1:
TABLE 1 Battery energy storage device (0.5MW/1MWh) Charge-discharge mode analysis table
(2) And calculating the economy of each charge-discharge mode, and selecting the charge-discharge mode with the highest economy for operation. The economic calculation method specifically comprises the following steps:
according to the daily charging and discharging mode of the battery energy storage device 3 and the corresponding electricity price mechanism, the charging and discharging method can be usedCalculating economic benefit, wherein B is default operation mode, and M isBFor the direct annual economic gain of the battery energy storage device 3 in the multiple daily charge-discharge cycle mode of operation, NBThe number of days of the battery energy storage device 3 in the operation mode in one year, K is the number of Charge and discharge cycles per day of the user side energy storage device, C is the actual available capacity after considering the upper and lower limits of the SOC (State of Charge) of the battery energy storage device 3, μ is the comprehensive utilization efficiency of the battery energy storage device 3, Prout,i、Prin,iRespectively the discharge electricity price and the charge electricity price in the ith charge-discharge cycle according to the local peak-valley electricity price catalog, DBThe discharge electricity charge of the battery energy storage device 3 in this operating mode is discounted.
It should be noted that, because the battery energy storage construction needs a certain place and is located at the user side, there is often no place for the operator to operate the battery energy storage project at the user side. In order to stimulate the enthusiasm of the user for cooperating with the battery energy storage project of the user side, the user needs to be given a certain amount of discharge electricity fee privilege for paying the rent of the user site. The principle of preferential discount establishment is that the preferential limit of energy storage and discharge of the battery is approximately equal to the annual rent of the occupied user site, as shown in formula (4): c, mu, PrX·(1-D)·NY＝S·PS·NMWherein, PrXThe discharging unit price of the user side battery energy storage system facing to the variable electricity price mechanism is D, the discharging electricity fee is discounted, and N isYThe number of days per year is 365 days, S is the area of the renting user site, PSUnit price for monthly user floor rental, NMFor each month, 12 months are taken.
(3) The battery energy storage device 3 is charged and discharged within a set time period according to a predetermined charging and discharging mode.
The charging and discharging mode corresponding to the electricity price mechanism of each time interval is selected by adopting the principle that the economy of the charging and discharging mode is the highest, and the battery energy storage device 3 is controlled to operate in the charging and discharging mode corresponding to the electricity price mechanism of each time interval in the multi-time interval electricity price mechanism, so that the battery energy storage device 3 is not limited to a certain fixed charging and discharging mode, the charging and discharging flexibility is improved, the regulation effect of the stored energy on a power grid is further developed, and the income of a user-side battery energy storage system operator facing to a multi-electricity price mechanism can be improved.
It should be noted that, methods and algorithms that the processor 4 uses the highest economy of the charge-discharge mode as a principle to select the charge-discharge mode corresponding to the electricity price mechanism of each time interval are all the contents that exist in the prior art, and the present application is only applied to the user-side battery energy storage system facing the multi-variable electricity price mechanism as a way to obtain the charge-discharge mode corresponding to the electricity price mechanism of each time interval. Of course, the charge and discharge mode corresponding to the electricity price mechanism of each time interval may be selected by other principles, and the battery energy storage device 3 is controlled to operate in the selected charge and discharge mode.
According to the technical scheme, the communication terminal connected with the power grid equipment is arranged, the processor connected with the communication terminal and the battery energy storage equipment is arranged, the battery energy storage equipment is controlled to operate in the charging and discharging mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism through the processor, namely, the battery energy storage equipment can respectively operate in the charging and discharging mode corresponding to the electricity price mechanism through the communication terminal and the processor, the battery energy storage equipment can not be limited to a certain fixed charging and discharging mode, and therefore the charging and discharging flexibility of the battery energy storage equipment located on the user side is improved.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable price of electricity mechanism can also include:
the first intelligent electric meter 5 is arranged at a grid connection point of the battery energy storage device 3 and is connected with the processor 4;
and a second smart meter 7 disposed at a common connection point of the user side and the upper grid 6 and connected to the processor 4.
The significance of configuring the battery energy storage device 3 in the industrial park is to promote coordination of distributed resources in the park on one hand, and to provide a peak clipping auxiliary service for the upper-level power grid 6 on the other hand. When an electric power dispatching mechanism in a power grid enterprise needs an industrial park to participate in peak clipping auxiliary service or demand response of a large power grid, a peak clipping instruction is issued to the industrial park, and at the moment, the internal part of the industrial park can meet the peak clipping demand of the electric power dispatching mechanism through interactive response. If the power dispatching mechanism reaches an adjusting instruction (including a peak clipping instruction or a demand response participation instruction) to the industrial park, the processor 4 decomposes the total adjusting instruction into each user-side battery energy storage system facing a multi-variable power rate mechanism according to the adjustable capacity of all the battery energy storage devices 3 in the industrial park, and uniformly controls the output electric power of all the battery energy storage devices 3 until the adjusting instruction of the power dispatching mechanism is finished, and then the battery energy storage devices 3 recover the original charge-discharge mode, namely recover the charge-discharge mode corresponding to the power rate mechanism in the current period.
At this time, in order to facilitate settlement of the electricity fee with the user, the first smart meter 5 connected to the processor 4 may be disposed at a grid-connected point of the battery energy storage device 3, the second smart meter 7 connected to the processor 4 may be disposed at a public connection point of the user side and the upper grid 6, the charge and discharge electric quantity and the charge and discharge power of the battery energy storage device 3 at each time interval are acquired through the first smart meter 5 and the second smart meter 7, and the acquired data is reported to the processor 4 in real time, the processor 4 calculates the electricity fee according to the acquired charge and discharge electric quantity and the electricity fee at the corresponding time interval, and settles the electricity fee with the user according to a predetermined contract at the end of each month (of course, other time intervals may also be used).
In practical situations, the time for the power dispatching mechanism to issue the peak clipping instruction to the industrial park is short, and the proportion of the total peak clipping electric quantity to the total power consumption of the industrial park all the year around is small. Therefore, for the convenience of calculation, the amount of change of the benefits in other charge and discharge modes of energy storage due to participation in the peak clipping auxiliary service is ignored. At this time, the interactive response gain of the battery energy storage device 3 can be obtained by MC＝Lover·α·PDR(formula (5)) wherein C is the interactive response mode of operation, MCFor interactive response benefits, L, of the battery energy storage device 3overResponding the total electric quantity of the peak clipping instruction of the power dispatching mechanism for the industrial park all the year around, wherein alpha is the proportion of the battery energy storage project of the user side participating in the interactive response of the whole industrial park, PDRAnd compensating unit price for the interactive response electric quantity.
It should be noted that the above manner for calculating the interactive response profit is already the content existing in the prior art, and the present application only applies the method to a user-side battery energy storage system facing a variable price mechanism to settle the electricity charges with the user.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable price of electricity mechanism, between first smart electric meter 5 and treater 4, between second smart electric meter 7 and treater 4, between grid equipment 1 and communication terminal 2, between communication terminal 2 and treater 4, all can link to each other through communication cable between treater 4 and the battery energy storage equipment 3.
In the user-side battery energy storage system facing to the multi-variable electricity price mechanism, the first intelligent electric meter 5 and the processor 4, the second intelligent electric meter 7 and the processor 4, the power grid equipment 1 and the communication terminal 2 in the power grid enterprise, the communication terminal 2 and the processor 4, and the processor 4 and the battery energy storage equipment 3 can be connected through communication cables, that is, the communication cables can be used for data transmission, so that the stability and the safety of data transmission are improved, and high-speed data transmission is realized.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable price of electricity mechanism, between first smart electric meter 5 and treater 4, between second smart electric meter 7 and treater 4, between grid equipment 1 and communication terminal 2, between communication terminal 2 and treater 4, all can link to each other through wireless communication module between treater 4 and the battery energy storage equipment 3.
The first smart meter 5 and the processor 4, the second smart meter 7 and the processor 4, the power grid device 1 and the communication terminal 2, the communication terminal 2 and the processor 4, and the processor 4 and the battery energy storage device 3 can be connected through a wireless communication module, that is, data can be transmitted through the wireless communication module, so that the use of communication cables is reduced, and data transmission is not limited by environment.
The wireless communication module mentioned here may be any one of a WiFi communication module, a bluetooth communication module, and a ZigBee communication module.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable electrovalence mechanism, battery energy storage equipment 3 can be sodium-sulfur battery equipment.
The battery energy storage device 3 included in the user-side battery energy storage system facing the variable electrovalence mechanism can be specifically a sodium-sulfur battery device, and specifically comprises a positive electrode, a negative electrode, an electrolyte, a diaphragm and a shell, and has the characteristics of small volume, large capacity, long service life, high efficiency and the like.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable electrovalence mechanism, battery energy storage equipment 3 can be lithium ion battery equipment.
And a lithium ion battery device can be used as the battery energy storage device 3, and has the characteristics of high energy storage density, good energy storage efficiency, good rate characteristic and the like.
Of course, devices such as redox flow energy storage batteries may also be utilized as the battery energy storage device 3.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable price of electricity mechanism can also include: a display device connected to the processor 4.
A display device connected with the processor 4 can be further arranged in the user-side battery energy storage system facing the multi-variable electricity price mechanism, the display device can display the charging and discharging modes of the battery energy storage equipment 3, and can display the multi-period electricity price mechanism acquired from the communication terminal 2, so that a user or an operator can directly and timely acquire relevant information from the display device.
The display device and the processor 4 may be connected through a communication cable or a wireless communication module.
The embodiment of the utility model provides a pair of user side battery energy storage system towards changeable price of electricity mechanism, display device can be for the LED display screen.
The display device connected to the processor 4 may be a Light Emitting Diode (LED) display screen, which has the characteristics of high display brightness, long service life, stable performance, and the like.
Of course, an LCD (Liquid Crystal display) display screen may also be used as a display device in the user-side battery energy storage system facing the multi-variable power rate mechanism to display the related information.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, the embodiment of the present invention provides a part of the above technical solution consistent with the realization principle of the corresponding technical solution in the prior art, which is not described in detail, so as to avoid redundant description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A user side battery energy storage system facing a multi-variable electricity price mechanism is characterized by comprising:
the communication terminal is connected with the power grid equipment and used for acquiring a multi-period electricity price mechanism;
the battery energy storage equipment is positioned at the user side;
and the processor is connected with the communication terminal and the battery energy storage device and is used for controlling the battery energy storage device to operate in a charging and discharging mode corresponding to the electricity price mechanism of each time period in the multi-time-period electricity price mechanism.
2. The multi-tariff mechanism oriented user-side battery energy storage system of claim 1 further comprising:
the first intelligent electric meter is arranged at a grid connection point of the battery energy storage equipment and connected with the processor;
and the second intelligent electric meter is arranged at a public connection point of the user side and the superior power grid and is connected with the processor.
3. The multi-tariff mechanism oriented user-side battery energy storage system of claim 2, wherein the first smart meter and the processor, the second smart meter and the processor, the grid device and the communication terminal, the communication terminal and the processor, and the processor and the battery energy storage device are all connected by communication cables.
4. The multi-tariff mechanism oriented user-side battery energy storage system of claim 2, wherein the first smart meter and the processor, the second smart meter and the processor, the grid device and the communication terminal, the communication terminal and the processor, and the processor and the battery energy storage device are connected through a wireless communication module.
5. The multi-tariff mechanism oriented user-side battery energy storage system of claim 1 wherein the battery energy storage device is a sodium-sulfur battery device.
6. The multi-tariff mechanism oriented user-side battery energy storage system of claim 1, wherein the battery energy storage device is a lithium ion battery device.
7. The multi-tariff mechanism oriented user-side battery energy storage system of any of claims 1 to 6, further comprising: a display device coupled to the processor.
8. The multi-tariff mechanism oriented user-side battery energy storage system of claim 7 wherein the display device is an LED display screen.
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