Energy storage participation in demand response method, apparatus and medium

Abstract

The application discloses a kind of energy storage participates in demand response method, device and medium. By obtaining the power consumption change value of user participation demand response and the peak clipping response load and valley filling response load corresponding to the user;According to the power consumption change value, the peak clipping response load and the valley filling response load determine the response mode of the energy storage participation demand response;Wherein, the response mode includes recovery state of charge, according to maximum discharge power and recovery state of charge demand participates in peak clipping response, according to maximum charging power and recovery state of charge demand participates in valley filling response, according to maximum discharge power participates in peak clipping response and according to maximum charging power participates in peak clipping response.The technical scheme of the embodiment of the present application can determine different response modes of energy storage participation demand according to the power consumption change value of user, peak clipping response load and valley filling response load, improve response flexibility and response ability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart grid, and particularly relates to an energy storage participating demand response method and device and medium. BACKGROUND

[0002] With the access of massive renewable energy and the continuous increase of user-side load, the peak-valley difference of the power system is continuously enlarged, and the excessive peak-valley difference will cause harm to the production, quality, safety and economic operation of the power system, and has a great influence on power supply enterprises and users.

[0003] Demand response relies on user-side load adjustment, the participating demand response scene is single, and the user-side participating demand response capability is limited. According to the demand response value of the energy storage, overcharging and discharging of the energy storage are easily caused, the service life is reduced, the cost of the energy storage participating demand response is increased, and it is difficult to consider the recovery of the state of charge of the energy storage by relying on the energy storage participating demand response, so that the state of charge cannot be maintained well, and the subsequent operation of the energy storage is affected. SUMMARY

[0004] The present application provides an energy storage participating demand response method, device and medium to solve the problems of single demand response mode and prevent overcharging and discharging of the energy storage, improve the response flexibility and response capability, and reduce the service life attenuation of the energy storage system.

[0005] According to an aspect of the present application, an energy storage participating demand response method is provided, comprising:

[0006] obtaining a power consumption change value of a user participating demand response and a peak shaving response load and a valley filling response load corresponding to the user;

[0007] determining a response mode of the energy storage participating demand response according to the power consumption change value, the peak shaving response load and the valley filling response load;

[0008] The response mode includes recovering the state of charge, participating in peak shaving response according to the maximum discharging power and the recovery state of charge demand, participating in valley filling response according to the maximum charging power and the recovery state of charge demand, participating in peak shaving response according to the maximum discharging power, and participating in peak shaving response according to the maximum charging power.

[0009] According to another aspect of the present application, an energy storage participating demand response device is provided, characterized in that it comprises:

[0010] a data acquisition module for obtaining a power consumption change value of a user participating demand response and a peak shaving response load and a valley filling response load corresponding to the user;

[0011] a demand response module configured to determine a response mode of the energy storage participating in the demand response according to the power consumption change value, the peak shaving response load and the valley filling response load;

[0012] The response mode includes a recovery state of charge, participation in the peak shaving response according to a maximum discharging power and a recovery state of charge requirement, participation in the valley filling response according to a maximum charging power and a recovery state of charge requirement, participation in the peak shaving response according to the maximum discharging power, and participation in the peak shaving response according to the maximum charging power.

[0013] According to another aspect of the present application, an electronic device is provided, the electronic device comprising:

[0014] at least one processor; and

[0015] a memory in communication with the at least one processor; wherein

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the energy storage participating in the demand response method according to any one of the embodiments of the present application.

[0017] According to another aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium stores computer instructions for enabling a processor to implement the energy storage participating in the demand response method according to any one of the embodiments of the present application when executed by the processor.

[0018] The technical solution of the embodiments of the present application fully considers the individualized needs of users by obtaining a power consumption change value of the user participating in the demand response and a peak shaving response load and a valley filling response load corresponding to the user; and determines a response mode of the energy storage participating in the demand response according to the power consumption change value, the peak shaving response load and the valley filling response load. The response mode includes a recovery state of charge, participation in the peak shaving response according to a maximum discharging power and a recovery state of charge requirement, participation in the valley filling response according to a maximum charging power and a recovery state of charge requirement, participation in the peak shaving response according to the maximum discharging power, and participation in the peak shaving response according to the maximum charging power. The above solves the problem that the scene of the demand response is single and the adjustment capability is limited, and that overcharging and discharging of the energy storage is easy to occur when the energy storage participates in the demand response only, thereby reducing the service life, and achieves the beneficial effects of preventing overcharging and discharging of the energy storage, improving the response flexibility and the response capability, reducing the service life attenuation of the energy storage system, and optimizing the resource allocation.

[0019] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0021] Figure 1 is a flow chart of a method for energy storage participating in demand response according to an embodiment of the present application;

[0022] Figure 2 is a flow chart of a method for energy storage participating in demand response according to an embodiment of the present application;

[0023] Figure 3 is a flow chart of a method for energy storage participating in demand response according to an embodiment of the present application;

[0024] Figure 4 is a structural schematic diagram of a device for energy storage participating in demand response according to an embodiment of the present application;

[0025] Figure 5 is a structural schematic diagram of an electronic device for implementing the method for energy storage participating in demand response according to an embodiment of the present application; DETAILED DESCRIPTION

[0026] In order to make the person skilled in the art better understand the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0027] It should be noted that the terms "include", "have", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] Embodiment one

[0029] Figure 1 A flowchart of a method for energy storage participating in demand response is provided for the first embodiment of the present application. The method can be applied to the case of energy storage participating in demand response. The method can be executed by a demand response method device for energy storage. The device can be realized in the form of hardware and / or software. The device can be configured in an electronic device.

[0030] As shown in Figure 1 , the method of the present embodiment can specifically include:

[0031] S110, obtaining a power consumption change value of a user participating in demand response and a peak shaving response load and a valley filling response load corresponding to the user.

[0032] The power consumption change value can be understood as the amount of electricity that the user can use to participate in demand response. The peak shaving response load can be the power load that can be reduced during the peak power consumption period. The valley filling response load can be the power load that can be increased during the valley power consumption period.

[0033] Optionally, obtaining the peak shaving response load and the valley filling response load corresponding to the user can include determining the peak shaving response load and the valley filling response load corresponding to the user according to the peak shaving response load during the historical peak power consumption period and the valley filling response load during the historical valley power consumption period, or obtaining the peak shaving response load and the valley filling response load corresponding to the user that are set in advance.

[0034] Optionally, obtaining the power consumption change value of the user participating in demand response can be determined according to the power service cost of the user for each time period and the sensitivity of the user to the power service cost.

[0035] In the embodiment of the present application, by obtaining the power consumption change value of the user participating in demand response and the peak shaving response load and the valley filling response load corresponding to the user, the enthusiasm of the user participating in demand response can be better understood, the participation degree of the user-side adjustable load can be understood, and the ability of the user participating in load adjustment in different regions and at different times can be more accurately determined.

[0036] S120, determining a response mode of the energy storage participating in demand response according to the power consumption change value, the peak shaving response load and the valley filling response load.

[0037] The response mode can be understood as controlling the energy storage to participate in demand response in which way. The response mode can include multiple modes. Different demands can correspond to different response modes. The correspondence between the demand and the response mode can include one-to-one, one-to-many, many-to-one and many-to-many, etc.

[0038] The response mode can include resuming the state of charge, participating in peak shaving response according to the maximum discharging power and the resuming state of charge demand, participating in valley filling response according to the maximum charging power and the resuming state of charge demand, participating in peak shaving response according to the maximum discharging power, participating in peak shaving response according to the maximum charging power, and the like.

[0039] In the embodiments of the present application, the maximum discharging power and the maximum charging power of the energy storage are determined, and the resuming state of charge power and the discharging resuming state of charge power of the energy storage are determined in various ways.

[0040] Optionally, the energy storage demand response method can further include: determining the maximum discharging power and the maximum charging power of the energy storage based on a power curve of the energy storage system, wherein the power curve is constructed by using a logistic function; and / or determining the charging resuming state of charge power and the discharging resuming state of charge power of the energy storage based on a resuming state of charge demand curve of the energy storage system.

[0041] The power curve can be a corresponding curve of the output power of the wind turbine generator and the wind speed, and the power change corresponding to the wind speed change at different times can be determined based on the power curve.

[0042] The resuming state of charge demand curve of the energy storage system can be a curve representing the relationship between the power value and the demand.

[0043] The resuming state of charge demand of the energy storage system can include limiting charging and / or discharging when the state of charge has too large an electric capacity, and limiting discharging and / or charging when the state of charge has too small an electric capacity. For example, based on the resuming state of charge demand curve of the energy storage system, a higher curve represents greater demand, and charging is stopped and / or discharging is performed, and vice versa, a lower curve represents smaller demand, and charging is stopped and / or discharging is performed.

[0044] In the embodiments of the present application, different response modes can be set for different working conditions, the scenarios of demand response can be enriched, and the power constraint is combined with the state of charge. The problem of overcharging and discharging of the energy storage and the reduction of the service life can be effectively avoided. The energy storage and the adjustable load can be better involved in demand response, and the flexibility of demand adjustment can be improved.

[0045] The technical scheme of the embodiment obtains a power consumption change value of user participation in demand response and a peak shaving response load and a valley filling response load corresponding to the user, determines a response mode of the energy storage participation in demand response according to the power consumption change value, the peak shaving response load and the valley filling response load, and determines different response modes of the energy storage participation in demand response, wherein the response mode includes a recovery state of charge, participation in peak shaving response according to a maximum discharge power and a recovery state of charge demand, participation in valley filling response according to a maximum charge power and a recovery state of charge demand, participation in peak shaving response according to the maximum discharge power, and participation in peak shaving response according to the maximum charge power. The problems that a single scene of demand response and limited adjustment capacity, and over-discharge and over-charge of energy storage participating in demand response to reduce the service life are solved, the over-discharge and over-charge of energy storage are prevented, the response flexibility and the response capacity are improved, the service life attenuation of the energy storage system is reduced, and the beneficial effects of optimizing resource allocation are achieved.

[0046] Embodiment two

[0047] Figure 2 A flowchart of a method for energy storage participation in demand response provided for the second embodiment of the application, the embodiment is a further refinement of the above-mentioned embodiment. As shown in the figure, the method comprises: Figure 2

[0048] S210, obtaining a power consumption change value of user participation in demand response and a peak shaving response load and a valley filling response load corresponding to the user.

[0049] For ease of description, in the embodiment of the application, the power consumption change value of user participation in demand response can be represented by P, the peak shaving response load corresponding to the user can be represented by P up , and the valley filling response load corresponding to the user can be represented by P dn .

[0050] S220, determining a response threshold of enabling energy storage participation in demand response, taking the opposite number of the product of the valley filling response load and the response threshold as a first boundary value, and taking the product of the peak shaving response load and the response threshold as a second boundary value, wherein the response threshold is greater than 0 and not greater than 1.

[0051] In the embodiment of the application, the response threshold can be represented by λ, at this time, the value range of λ can be 0<λ≤1. Specifically, the opposite number of the product of the valley filling response load and the response threshold can be-λP dn , and the product of the peak shaving response load and the response threshold can be λP up .

[0052] ​S230, determining the response mode of the energy storage participating in the demand response according to the electricity change value, the first boundary value and the second boundary value.

[0053] Specifically, the response mode of the energy storage participating in the demand response can be determined according to the size relationship among the electricity change value, the first boundary value and the second boundary value.

[0054] Optionally, the response mode of the energy storage participating in the demand response is determined according to the electricity change value, the first boundary value -λP dn and the second boundary value λP up , and includes: in a case where the electricity change value is not less than the first boundary value and not greater than the second boundary value, controlling the energy storage to participate in the demand response according to the state of charge of the energy storage, the charging recovery state of charge power and the discharging recovery state of charge power of the energy storage.

[0055] In the embodiments of the present disclosure, the charging recovery state of charge power of the energy storage can be represented by P cr , and the discharging recovery state of charge power of the energy storage can be represented by P dr .

[0056] Optionally, when the electricity change value P is not less than the first boundary value and not greater than the second boundary value, i.e., -λP dn ≤P≤λP up , the state of charge is preferentially recovered according to the state of charge SOC(t) of the energy storage, the charging recovery state of charge power P cr and the discharging recovery state of charge power P dr of the energy storage.

[0057] The state of charge of the energy storage at the current time can be calculated according to a time interval, output data of the energy storage at the current time and an energy capacity of the energy storage. Specifically, the following formula can be used for calculation:

[0058]

[0059] wherein SOC(t) represents the state of charge of the energy storage at the current time, △t represents the time interval, P ref represents the output data of the energy storage at the current time, and E st represents the rated capacity of the energy storage.

[0060] Optionally, when the electricity change value P is not less than the first boundary value and not greater than the second boundary value, -λP dn ≤P≤λP up , the state of charge is preferentially recovered according to the state of charge of the energy storage at the current time, the charging recovery state of charge power P cr and the discharging recovery state of charge power Pdr Control the energy storage to prioritize restoring its state of charge.

[0061] Optionally, the value that the user can adjust to meet the demand response varies depending on the current output data of the energy storage.

[0062] Optionally, when the change in electricity consumption P is not less than the first boundary value and not greater than the second boundary value, -λP dn ≤P≤λP up At this time, the energy storage prioritizes restoring its state of charge. The current output value P of the energy storage is then calculated. ref This may include the following situations:

[0063] When the state of charge (SOC) is less than the lower value of the energy storage SOC, the current output power of the energy storage can be the negative value of the charging power to restore the SOC to the energy storage state of charge, -P. cr ;

[0064] When the state of charge is not less than the lower value of the energy storage state of charge and not greater than the higher value of the energy storage state of charge, the current output value of the energy storage can be 0.

[0065] When the state of charge is greater than the higher value of the energy storage state of charge, the current output value of the energy storage can be the power value of the discharge to restore the state of charge.

[0066] Among them, the current output data P of energy storage ref It can be calculated using the following formula:

[0067]

[0068] At this point, the value of user-adjustable load participating in demand response is PP. ref .

[0069] In this embodiment of the invention, P is used. st The energy storage power corresponding to the user is selectable, provided that the change in electricity consumption is greater than the second boundary value but not greater than the sum of the peak-shaving response load and the energy storage power corresponding to the user, i.e., λP up <P≤P st +P up Energy storage takes into account the maximum discharge power and the need to restore the state of charge to participate in peak shaving response.

[0070] Optionally, the current output data P of the energy storage ref This can include the following situations:

[0071] When the state of charge is less than the lower of the preset energy storage state of charge, the current output value of the energy storage can be within the range {P}. dmax -P cr The maximum value within the range of 0, where P dmax Indicates the maximum discharge power;

[0072] When the state of charge is not less than the lower value of the state of charge of the energy storage and not greater than the higher value of the state of charge of the energy storage, the current output value of the energy storage can be the maximum discharge power value P dmax ;

[0073] When the state of charge is greater than the higher value of the state of charge of the energy storage, the current output value of the energy storage can be the minimum value in the interval {P dmax +P dr , P dmax}.

[0074] Wherein, the output data P ref of the energy storage at the current moment of the energy storage at the current moment can be calculated by the following formula:

[0075]

[0076] At this time, the user can adjust the value meeting the demand response participation to be P-P ref ;

[0077] Optionally, in the case that the power consumption change value is not less than the difference between the opposite number of the user corresponding energy storage power and the valley filling response load and less than the first boundary value, -P st -P dn ≤P<-λP dn , the energy storage considers the maximum charging power and the recovery state of charge demand to participate in the valley filling response, and at this time, the output data P ref of the energy storage at the current moment can include the following cases:

[0078] When the state of charge is less than the lower value of the pre-set state of charge of the energy storage, the current output value of the energy storage can be the maximum value in the interval {-P cmax -P cr , -P cmax}, wherein P cmax represents the maximum charging power;

[0079] When the state of charge is not less than the lower value of the state of charge of the energy storage and not greater than the higher value of the state of charge of the energy storage, the current output value of the energy storage can be the opposite number of the maximum charging power -P cmax ;

[0080] When the state of charge is greater than the higher value of the state of charge of the energy storage, the current output value of the energy storage can be the minimum value in the interval {-P cmax +P dr , 0}.

[0081] Wherein, the output data P ref of the energy storage at the current moment can be calculated by the following formula:

[0082]

[0083] At this time, the user can adjust the value of the load participating in demand response to P-P ref ;

[0084] Optionally, in the case where the power consumption change value is greater than the sum of the peak shaving response load and the energy storage power corresponding to the user, P>P st +P up , the energy storage participates in valley filling response at the maximum charging power, at which time the output data P ref of the energy storage at the current time can be: the output data of the energy storage at the current time is equal to the maximum discharging power value.

[0085] P ref of the energy storage at the current time can be calculated by the following formula:

[0086] P ref =P cmax

[0087] At this time, the user can adjust the value of the load participating in demand response to P up .

[0088] Optionally, in the case where the power consumption change value is less than the difference between the opposite number of the energy storage power corresponding to the user and the valley filling response load, P<-P st -P dn , at which time the output data P ref of the energy storage at the current time can be: the output data of the energy storage at the current time is the maximum charging power value.

[0089] P ref of the energy storage at the current time can be calculated by the following formula:

[0090] P ref =P cmax

[0091] At this time, the user can adjust the value of the load participating in demand response to -P dn ;

[0092] Optionally, the determining the response mode of the energy storage participating in demand response according to the power consumption change value, the first boundary value and the second boundary value can include: in the case where the power consumption change value is greater than the second boundary value and is not greater than the sum of the peak shaving response load and the energy storage power corresponding to the user, controlling the energy storage to participate in demand response according to the maximum discharging power, the charging state of charge recovery power and the discharging state of charge recovery power of the energy storage.

[0093] That is, in the case where λP up <P≤P st +P upIn the case of -P dmax , the charging recovery state of charge power P cr of the energy storage, and the discharging recovery state of charge power P dr of the energy storage, the maximum discharge depth of the energy storage and the demand of recovering the state of charge of the energy storage are determined to participate in the peak shaving response. Wherein, P cr represents the charging recovery state of charge power, P dr represents the discharging recovery state of charge power

[0094] In the embodiment of the application, the maximum discharge power P dmax may be calculated according to the energy storage power, the initial value of the power, the state of charge of the energy storage at the current time, the minimum value of the state of charge of the energy storage, and the lower value of the state of charge of the energy storage.

[0095] Specifically, the maximum discharge power P dmax may be calculated based on the following formula:

[0096]

[0097] Wherein, P dmax is the maximum discharge power, P st is the configured energy storage power, P0 represents the initial value, SOC(t) represents the state of charge of the energy storage at the current time, SOC min is the minimum value of the state of charge of the energy storage, and SOC low is the lower value of the state of charge of the energy storage.

[0098] Optionally, the response mode of the energy storage participating in the demand response is determined according to the change value of the electricity consumption, the first boundary value and the second boundary value, which can include: in the case that the change value of the electricity consumption is not less than the difference between the opposite number of the energy storage power corresponding to the user and the valley filling response load and is less than the first boundary value, the maximum charging power, the charging recovery state of charge power of the energy storage and the discharging recovery state of charge power are used to control the energy storage to participate in the valley filling response.

[0099] That is, in the case of -P st -P dn ≤P<-λP dn , the maximum charging power P cmax , the charging recovery state of charge power P cr of the energy storage and the discharging recovery state of charge power P dr of the energy storage are used to determine the maximum charging depth of the energy storage and the demand of recovering the state of charge to participate in the valley filling response.

[0100] Specifically, the maximum charging power P cmaxThe maximum charging power P can be calculated according to the energy storage power, the initial value of the power, the maximum limit value of the energy storage state of charge, the higher value of the energy storage state of charge and the current state of charge of the energy storage. cmax The maximum charging power P can be calculated according to the following formula:

[0101]

[0102] Wherein, P cmax is the maximum charging power, P st is the configured energy storage power, P0 represents the initial value, SOC max is the maximum limit value of the energy storage state of charge, SOC high is the higher value of the energy storage state of charge, and SOC(t) represents the current state of charge of the energy storage.

[0103] Optionally, the response mode of the energy storage participating in the demand response can be determined according to the electricity consumption change value, the first boundary value and the second boundary value, and can include: in the case that the electricity consumption change value is greater than the sum of the peak shaving response load and the energy storage power corresponding to the user, the energy storage is controlled to participate in the peak shaving response at the maximum discharging power and participate in the peak shaving response at the maximum charging power.

[0104] That is, in the case that P>P st +P up , the maximum charging power P cmax is P dmax .

[0105] Optionally, the response mode of the energy storage participating in the demand response can be determined according to the electricity consumption change value, the first boundary value and the second boundary value, and can include: in the case that the electricity consumption change value is less than the difference between the opposite number of the energy storage power corresponding to the user and the valley filling response load, the energy storage is controlled to participate in the valley filling response according to the maximum charging power and the demand of recovering the state of charge.

[0106] That is, in the case that P<-P st -P dn , the energy storage is controlled to participate in the valley filling response according to the maximum charging power P cmax and the demand of recovering the state of charge.

[0107] The technical scheme of the embodiment of the present application can distinguish different working conditions, and set different response modes of the energy storage participating in the demand response for different working conditions, so that the mode of the energy storage participating in the demand response is more flexible, and the fine control of the energy storage participating in the demand response is realized.

[0108] Figure 3 A flowchart of an optional example of a method for energy storage participating in demand response is provided. As shown in FIG. 1, the method can include the following steps.Figure 3 As shown, the energy storage participating demand response method specifically includes the following steps:

[0109] (1) According to the electricity service cost set for each time period and the sensitivity of the user to the electricity service cost, determine the value P of the user participating in demand response;

[0110] (2) Read the load (peak shaving response load) that the user can participate in peak shaving response as P up , the load (valley filling response load) that the user can participate in valley filling response as P dn , the configured energy storage power of the user as P st , and the rated capacity of the energy storage as E st ;

[0111] (3) Set the logistic power curve of the energy storage system to limit the maximum charge and discharge power of the energy storage to prevent excessive charge and discharge of the energy storage and reduce the charge and discharge depth. Specifically, the maximum charge power is P cmax , which is specifically calculated as follows:

[0112]

[0113] Where P cmax is the maximum charge power, P st is the configured energy storage power, P0 represents the initial value, SOC max is the upper limit of the state of charge of the energy storage, SOC high is the higher value of the state of charge of the energy storage, and SOC(t) represents the current state of charge of the energy storage.

[0114] Specifically, the maximum discharge power is P dmax , which is specifically calculated as follows:

[0115]

[0116] Where P dmax is the maximum discharge power, P st is the configured energy storage power, P0 represents the initial value, SOC(t) represents the current state of charge of the energy storage, SOC min is the lower limit of the state of charge of the energy storage, and SOC low is the lower value of the state of charge of the energy storage.

[0117] Specifically, the current state of charge of the energy storage can be calculated by the following formula:

[0118]

[0119] Where SOC(t) represents the current state of charge of the energy storage, △t is the time interval, and P refThis represents the current output data of the energy storage system.

[0120] (4) Set the recovery state of charge demand curve for the energy storage system to determine the current energy storage charging recovery state of charge power P. cr and the power P for recovering state of charge during discharge. dr The specific calculations are as follows:

[0121]

[0122] Among them, P dr To restore the state-of-charge power during discharge, SOC rh The higher charge value set for the energy storage to restore its state of charge demand curve, SOC rl The lower charge value set for the energy storage recovery state of charge demand curve.

[0123]

[0124] Among them, P cr To restore the state of charge power during charging, SOC rh The higher charge value set for the energy storage to restore its state of charge demand curve, SOC rl The lower charge value set for the energy storage recovery state of charge demand curve.

[0125] (5) Set the threshold λ (0≤λ≤1) for enabling energy storage to participate in demand response, which is used to control whether energy storage is called to participate in demand response;

[0126] (6) When -λP dn ≤P≤λP up When this happens, the energy storage prioritizes restoring its state of charge; at this time, the energy storage is currently...

[0127] P always exerts effort ref for:

[0128]

[0129] The value of user-adjustable load participating in demand response is PP. ref .

[0130] (7) When λP up <P≤P st +P up At this time, energy storage takes into account the maximum depth of discharge and the need to restore the state of charge to participate in peak shaving response. At this time, the current output data P of energy storage is... ref for:

[0131]

[0132] The value of user-adjustable load participating in demand response is PP. ref .

[0133] (8) When -P dt <P dn ≤P<-λP dn , the energy storage considers the maximum charging depth and the state of charge recovery demand to participate in the valley filling response, at this time the output data P ref of the energy storage at the current time is:

[0134]

[0135] The value of the user adjustable load participating in the demand response is P-P ref ;

[0136] (9) When P>P st +P up , the energy storage participates in the peak cutting response according to the maximum discharge power, at this time the output P ref of the energy storage at the current time is:

[0137] P ref =P dmax

[0138] The value of the user adjustable load participating in the demand response is P up ;

[0139] (10) When P<-P st -P dn , the energy storage participates in the valley filling response according to the maximum charging power, at this time the output P ref of the energy storage at the current time is:

[0140] P ref =P cmax

[0141] The value of the user adjustable load participating in the demand response is -P dn ;

[0142] (11) Determine whether the next period is a demand response period, if so, go to the next period and return to step (1), if not, end.

[0143] The technical scheme of the embodiment of the present application is directed to the problem of single scene and limited adjustment capacity of only relying on user-side adjustable load to participate in demand response. The method combines the excellent adjustment capacity of energy storage to propose a method of participating in demand response under five operating conditions, thereby improving the flexibility and capacity of demand response adjustment. Moreover, for the problem that energy storage will be overcharged and discharged to reduce the service life when the energy storage completely bases on demand response values without combining the state of charge for power constraint, the method limits the values of energy storage participating in demand response by using a logistic function to reduce the overcharge and discharge of energy storage. For the problem that the state of charge is not considered when energy storage participates in demand response, the method uses user-side adjustable load to preferentially restore the state of charge or consider the state of charge under certain conditions, so that the state of charge can be maintained well while participating in demand response, thereby having certain upward and downward adjustment margin and prolonging the service life of energy storage.

[0144] Embodiment three

[0145] Figure 4 A structural schematic diagram of an energy storage participating in demand response device provided by the third embodiment of the present application is shown in FIG. 3. As shown in the figure, the device comprises a data acquisition module 410 and a demand response module 420. Figure 4

[0146] The data acquisition module 410 is configured to acquire the electricity change value of user participating in demand response and the peak shaving response load and valley filling response load corresponding to the user. The demand response module 420 is configured to determine the response mode of the energy storage participating in demand response according to the electricity change value, the peak shaving response load and the valley filling response load. The response mode comprises restoring the state of charge, participating in peak shaving response according to the maximum discharge power and the demand of restoring the state of charge, participating in valley filling response according to the maximum charging power and the demand of restoring the state of charge, participating in peak shaving response according to the maximum discharge power and participating in peak shaving response according to the maximum charging power.

[0147] ​The energy storage demand response participation device provided by the embodiment of the application obtains the power consumption change value of user participation in demand response and the peak shaving response load and the valley filling response load corresponding to the user through a data acquisition module; a demand response module determines a response mode of the energy storage participation in demand response according to the power consumption change value, the peak shaving response load and the valley filling response load; wherein the response mode includes a recovery state of charge, participation in peak shaving response according to the maximum discharge power and the recovery state of charge demand, participation in valley filling response according to the maximum charging power and the recovery state of charge demand, participation in peak shaving response according to the maximum discharge power and participation in peak shaving response according to the maximum charging power. The problems that the scene of demand response is single and the adjustment capacity is limited and overcharging and discharging of the energy storage are prone to occur only by the energy storage participating in demand response are solved, the beneficial effects of preventing overcharging and discharging of the energy storage, improving response flexibility and response capacity, reducing life attenuation of the energy storage system and optimizing resource allocation are achieved.

[0148] Optionally, the demand response module comprises a boundary value determination unit and a response mode determination unit. The boundary value determination unit is configured to determine a response threshold value of enabling the energy storage to participate in demand response, take the opposite number of the product of the valley filling response load and the response threshold value as a first boundary value and take the product of the peak shaving response load and the response threshold value as a second boundary value, wherein the response threshold value is greater than 0 and not greater than 1. The response mode determination unit is configured to determine the response mode of the energy storage participating in demand response according to the power consumption change value, the first boundary value and the second boundary value.

[0149] Optionally, the response mode determination unit is configured to:

[0150] In a case where the power consumption change value is not less than the first boundary value and not greater than the second boundary value, the energy storage participates in demand response according to the state of charge of the energy storage, the charging recovery state of charge power and the discharging recovery state of charge power of the energy storage.

[0151] Optionally, the response mode determination unit is configured to:

[0152] In a case where the power consumption change value is greater than the second boundary value and not greater than the sum of the peak shaving response load and the energy storage power corresponding to the user, the energy storage participates in demand response according to the maximum discharge power, the charging recovery state of charge power and the discharging recovery state of charge power of the energy storage.

[0153] Optionally, the response mode determination unit is configured to:

[0154] In a case that the power consumption change value is not less than a difference between the opposite number of the energy storage power corresponding to the user and the valley filling response load and is less than the first boundary value, the energy storage is controlled to participate in the valley filling response according to the maximum charging power, the charging state of charge recovery power and the discharging state of charge recovery power of the energy storage.

[0155] Optionally, the response mode determination unit is configured to:

[0156] In a case that the power consumption change value is greater than the sum of the peak clipping response load and the energy storage power corresponding to the user, the energy storage is controlled to participate in the peak clipping response at the maximum discharging power and participate in the peak clipping response at the maximum charging power.

[0157] Optionally, the response mode determination unit is configured to:

[0158] In a case that the power consumption change value is less than a difference between the opposite number of the energy storage power corresponding to the user and the valley filling response load, the energy storage is controlled to participate in the valley filling response according to the maximum charging power and the state of charge recovery requirement.

[0159] Optionally, the energy storage participation demand response device further comprises an energy storage charging and discharging power determination module and / or a state of charge determination module.

[0160] The energy storage charging and discharging power determination module is configured to determine the maximum charging and discharging power and the maximum charging power of the energy storage based on a power curve of the energy storage system, wherein the power curve is constructed by using a logistic function; and the state of charge determination module is configured to determine the charging state of charge recovery power and the discharging state of charge recovery power of the energy storage based on a state of charge recovery requirement curve of the energy storage system.

[0161] The energy storage participation demand response device provided in the embodiments of the present application can execute the energy storage participation demand response method provided in any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0162] It should be noted that each unit and module included in the above device is only divided according to the function logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific name of each functional unit is only for convenient mutual distinction, and does not serve to limit the protection scope of the embodiments of the present application.

[0163] Embodiment Four

[0164] Figure 5A structural diagram of an electronic device 10 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smartphones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the present application described and / or claimed in this document.

[0165] As shown, Figure 5 The electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., communicatively connected to the at least one processor 11, where the memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 12 or loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0166] Various components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc., an output unit 17, such as various types of displays, speakers, etc., a storage unit 18, such as a magnetic disk, an optical disk, etc., and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0167] The processor 11 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs various methods and processes described above, such as the energy storage participation demand response method.

[0168] In some embodiments, the energy storage participation demand response method can be implemented as a computer program tangibly embodied in a computer readable storage medium, e.g., storage unit 18. In some embodiments, parts or all of the computer program can be loaded and / or installed onto electronic device 10 via, e.g., ROM 12 and / or communication unit 19. When the computer program is loaded onto RAM 13 and executed by processor 11, one or more steps of the energy storage participation demand response method described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the energy storage participation demand response method by other means, e.g., with the aid of firmware.

[0169] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (PLD), a computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0170] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program running on the processor implements the functions / operations specified in the flowcharts and / or the block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0171] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0172] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0173] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0174] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0175] It should be understood that the various forms of flow shown above can be reordered, added to, or have steps deleted. For example, the steps described in the present application can be performed in parallel, in series, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0176] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for energy storage to participate in demand response, characterized in that, include: Obtain the electricity consumption change values ​​of users participating in demand response, as well as the peak shaving response load and valley filling response load corresponding to the users; The response mode of energy storage in demand response is determined based on the electricity consumption change values, the peak shaving response load, and the valley filling response load, including: Determine the response threshold for enabling energy storage to participate in demand response, take the negative of the product of the valley filling response load and the response threshold as the first boundary value, and take the product of the peak shaving response load and the response threshold as the second boundary value, wherein the response threshold is greater than 0 and not greater than 1; When the change in electricity consumption is greater than the second boundary value but not greater than the sum of the peak shaving response load and the energy storage power corresponding to the user, the energy storage is controlled to participate in demand response based on the maximum discharge power, the charging recovery state power of the energy storage, and the discharging recovery state power. The current output data of the energy storage can be calculated using the following formula: Among them, P ref For the current output data of energy storage, P dmax P represents the maximum discharge power. cr P represents the power of energy storage to restore its state of charge. dr State of Charge (SOC) represents the power of energy storage as it recovers its state of charge during discharge. low The lower value of the energy storage state of charge, SOC high This represents a higher value for the energy storage state of charge. The response methods include restoring the state of charge, participating in peak shaving response based on the maximum discharge power and the state of charge restoration requirement, participating in valley filling response based on the maximum charging power and the state of charge restoration requirement, participating in peak shaving response based on the maximum discharge power, and participating in peak shaving response based on the maximum charging power.

2. The method according to claim 1, characterized in that, The step of determining the response mode of energy storage in demand response based on the electricity consumption change value, the first boundary value, and the second boundary value includes: When the change in electricity consumption is not less than the first boundary value and not greater than the second boundary value, the energy storage is controlled to participate in demand response based on the energy storage state of charge, the energy storage power to recover the state of charge by charging, and the energy storage power to recover the state of charge by discharging.

3. The method according to claim 1, characterized in that, The step of determining the response mode of energy storage in demand response based on the electricity consumption change value, the first boundary value, and the second boundary value includes: If the change in electricity consumption is not less than the difference between the negative of the energy storage power corresponding to the user and the valley filling response load and is less than the first boundary value, the energy storage is controlled to participate in the valley filling response based on the maximum charging power, the charging recovery state of charge power of the energy storage, and the discharging recovery state of charge power.

4. The method according to claim 1, characterized in that, The step of determining the response mode of energy storage in demand response based on the electricity consumption change value, the first boundary value, and the second boundary value includes: When the change in electricity consumption is greater than the sum of the peak-shaving response load and the energy storage power corresponding to the user, the energy storage is controlled to participate in the peak-shaving response at the maximum discharge power and at the maximum charging power.

5. The method according to claim 1, characterized in that, The step of determining the response mode of energy storage in demand response based on the electricity consumption change value, the first boundary value, and the second boundary value includes: If the change in electricity consumption is less than the difference between the negative of the energy storage power corresponding to the user and the valley filling response load, the energy storage is controlled to participate in the valley filling response according to the maximum charging power and the recovery state of charge requirements.

6. The method according to claim 1, characterized in that, Also includes: The maximum discharge power and maximum charging power of the energy storage system are determined based on the power curve of the energy storage system, wherein the power curve is constructed using the logistic function; And / or, Based on the recovery state of charge demand curve of the energy storage system, the charging recovery state of charge power and the discharging recovery state of charge power of the energy storage are determined.

7. An energy storage device for participating in demand response, characterized in that, include: The data acquisition module is used to acquire the electricity consumption change values ​​of users participating in demand response, as well as the peak shaving response load and valley filling response load corresponding to the users; The demand response module is used to determine the response mode of the energy storage in demand response based on the electricity consumption change value, the peak shaving response load and the valley filling response load; The demand response module includes: A boundary value determination unit is used to determine the response threshold for enabling energy storage to participate in demand response. The negative of the product of the valley filling response load and the response threshold is used as the first boundary value, and the product of the peak shaving response load and the response threshold is used as the second boundary value. The response threshold is greater than 0 and not greater than 1. The response mode determination unit is used for: When the change in electricity consumption is greater than the second boundary value but not greater than the sum of the peak shaving response load and the energy storage power corresponding to the user, the energy storage is controlled to participate in demand response based on the maximum discharge power, the charging recovery state power of the energy storage, and the discharging recovery state power. The current output data of the energy storage can be calculated using the following formula: Among them, P ref For the current output data of energy storage, P dmax P represents the maximum discharge power. cr P represents the power of energy storage to restore its state of charge. dr State of Charge (SOC) represents the power of energy storage as it recovers its state of charge during discharge. low The lower value of the energy storage state of charge, SOC high This represents a higher value for the energy storage state of charge. The response methods include restoring the state of charge, participating in peak shaving response based on the maximum discharge power and the state of charge restoration requirement, participating in valley filling response based on the maximum charging power and the state of charge restoration requirement, participating in peak shaving response based on the maximum discharge power, and participating in peak shaving response based on the maximum charging power.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the energy storage participation demand response method as described in any one of claims 1-6.

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