CN117526380A - Charging power adjustment method, device, control system and storage medium - Google Patents
Charging power adjustment method, device, control system and storage medium Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
Abstract
The invention discloses a charging power adjusting method, a charging power adjusting device, a charging power controlling system and a storage medium. Comprising the following steps: when the first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the lower limit value of the energy storage side power is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side; detecting whether overload occurs in the charging process of an energy storage system of the user side energy storage power station in real time; if overload does not occur at the current moment, the charging power of the energy storage side is adjusted in real time by taking the energy storage charging adjustment period as the adjustment frequency; and if overload occurs at the current moment, the lower limit value of the power of the energy storage side is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side, and the charging power of the energy storage side is adjusted in real time by taking the energy storage charging adjustment period updated in real time as the adjustment frequency. The method can effectively improve the average power of the energy storage system after overload and increase the utilization efficiency of energy storage.
Description
Technical Field
The embodiment of the invention relates to the technical field of new energy, in particular to a charging power adjusting method, a charging power adjusting device, a charging power controlling system and a storage medium.
Background
With the increase of energy demand and the development of renewable energy sources, user-side energy storage is becoming a hot topic in the energy field, and user-side energy storage refers to a technology for installing energy storage equipment on a user side and storing electric energy for later use. With the rise of energy storage at the user side, the combination complementation of various new energy sources of energy storage and photovoltaics is an important new energy source absorption mode.
In the existing user side energy storage business mode, due to unstable weather conditions such as overcast and rainy weather, instantaneous shielding of cloud layers and the like, photovoltaic output is unstable, power fluctuation of a superimposed load side is large, frequent overload of a main transformer of the user side is easy to cause, the energy storage side needs to repeatedly and immediately adjust charging power to a preset value to quickly respond to overload, the problem of excessive adjustment exists in the adjustment mode of the charging power, and optimal adjustment cannot be achieved.
Disclosure of Invention
The invention provides a charging power adjusting method, a device, a control system and a storage medium, which are used for solving the problem that the existing charging power adjusting mode has excessive adjustment and cannot be optimally adjusted.
According to an aspect of the present invention, there is provided a charging power adjustment method including:
When the first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the lower limit value of the energy storage side power is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side;
detecting whether overload occurs in the charging process of an energy storage system of the user side energy storage power station in real time;
if overload does not occur at the current moment, the charging power of the energy storage side is adjusted in real time in an energy storage charging adjustment period updated in real time, wherein the energy storage charging adjustment period is the average value of the energy storage charging adjustment periods of the previous n days updated in real time;
and if overload occurs at the current moment, the lower limit value of the power of the energy storage side is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side, and the charging power of the energy storage side is adjusted in real time in an energy storage charging adjustment period updated in real time.
According to another aspect of the present invention, there is provided an energy storage side control system including:
the first adjusting module is used for sending the lower limit value of the power of the energy storage side to the energy storage side as an adjusting value when detecting that the energy storage system of the energy storage power station of the user side is overloaded for the first time in the charging process, and is used for adjusting the charging power of the energy storage side;
The detection module is used for detecting whether overload occurs in the charging process of the energy storage system of the user side energy storage power station in real time;
the updating module is used for adjusting the charging power of the energy storage side in real time in the energy storage charging adjustment period updated in real time if overload does not occur at the current moment, wherein the energy storage charging adjustment period is the average value of the energy storage charging adjustment period of the previous n days updated in real time;
and the second adjusting module is used for sending the lower limit value of the power of the energy storage side to the energy storage side as an adjusting value if overload occurs at the current moment, adjusting the charging power of the energy storage side and adjusting the charging power of the energy storage side in real time in an energy storage charging adjusting period updated in real time.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the charging power adjustment method according to any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement the charging power adjustment method according to any one of the embodiments of the present invention when executed.
According to the technical scheme, when the first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the lower limit value of the energy storage side power is used as an adjustment value to be issued to the energy storage side so as to adjust the charging power of the energy storage side; detecting whether overload occurs in the charging process of an energy storage system of the user side energy storage power station in real time; if overload does not occur at the current moment, the charging power of the energy storage side is adjusted in real time in an energy storage charging adjustment period updated in real time, wherein the energy storage charging adjustment period is the average value of the energy storage charging adjustment periods of the previous n days updated in real time; if overload occurs at the current moment, the lower limit value of the power of the energy storage side is used as an adjustment value to be issued to the energy storage side for adjusting the charging power of the energy storage side, and the charging power of the energy storage side is adjusted in real time in the energy storage charging adjustment period updated in real time, so that the problem that the adjustment of the existing charging power is excessive is solved, the self-adaptive adjustment of the charging power is achieved, the average power of the energy storage system after overload is effectively improved, and the utilization efficiency of energy storage is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conventional customer-side energy storage power station;
fig. 2 is a flow chart of a charging power adjustment method according to a second embodiment of the present invention;
fig. 3 is a flow chart of a charging power adjustment method according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an energy storage side control system according to a third embodiment of the present invention;
fig. 5 is a schematic structural view of a control apparatus of an electric power adjusting method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention. It should be understood that the various steps recited in the method embodiments of the present invention may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that "one or more" is intended to be construed as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of such messages or information.
The existing user side energy storage power station mode is shown in fig. 1, fig. 1 is a schematic diagram of the existing user side energy storage power station mode, and the user side energy storage power station includes a user side, an energy storage side and a load side. The active power of the whole station refers to real-time active power of a user side energy storage power station collected by an ammeter at a main transformer; the energy storage power station active power refers to energy storage real-time active power collected by an energy storage side ammeter; the load active power refers to the load side active power, which is not normally directly collected by the electricity meter.
Example 1
Fig. 2 is a flow chart of a charging power adjustment method according to an embodiment of the present invention, where the method is applicable to a situation that an overload occurs in charging an energy storage system of an energy storage power station on a user side, and the method may be performed by a charging power adjustment device, where the device may be implemented by software and/or hardware and is generally integrated on a control device, and the control device in this embodiment may be a control device on the energy storage side.
As shown in fig. 2, a charging power adjustment method provided in a first embodiment of the present invention includes the following steps:
and S110, when the first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the lower limit value of the energy storage side power is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side.
The overload of the charging of the energy storage system of the user side energy storage power station can be understood as the overload of the active power of the whole station at the main transformer.
In this embodiment, whether overload occurs in the charging process of the energy storage system of the user energy storage power station is detected in real time, if the first overload is detected, the lower limit value of the power of the energy storage side can be used as an adjustment value and sent to the energy storage side through an instruction, so that the energy storage side adjusts the charging power of the energy storage side according to the adjustment value.
The lower limit value of the power of the energy storage side can be calculated in real time by the following mode: if the system is currently in the charging time period, taking the current time period as the reference, according to the real-time power P of the main transformer position collected by the electric meter of the main transformer position Main transformer acquisition And energy storage real-time active power P acquired in real time through energy storage side ammeter Energy storage collection Updating load side real-time power P in charging period Real-time load The method comprises the steps of carrying out a first treatment on the surface of the Recording the maximum value P of the load active power in the current time period of the previous n days Load max for the first n days Will P Load max for the first n days Real-time power P at load side Real-time load As the maximum value P that the load end can reach during the charging period of the current day Predicted load max The method comprises the steps of carrying out a first treatment on the surface of the When the energy storage system is charged and overloaded, the rated power P at the main transformer is used for Main transformer rating And P Predicted load max And calculating the lower limit value of the energy storage side power corresponding to the current moment. .
In this embodiment, after the overload occurs in the charging of the energy storage system of the user side energy storage power station, the energy storage side control system may issue the lower limit value of the energy storage side power calculated at the current moment to the energy storage side, and the energy storage side responds to the energy storage side control system to adjust the value of the energy storage side power to be the same as the value of the lower limit value of the energy storage side power as much as possible.
S120, detecting whether overload occurs in the charging process of the energy storage system of the user side energy storage power station in real time.
In this embodiment, after detecting that the first overload occurs in the charging process of the energy storage system of the energy storage power station on the user side, it is to continuously detect whether the overload occurs. How to detect the detection is not described here in detail.
And S130, if overload does not occur at the current moment, the charging power of the energy storage side is adjusted in real time by taking the energy storage charging adjustment period as the adjustment frequency, wherein the energy storage charging adjustment period is the average value of the energy storage charging adjustment periods of the previous n days updated in real time.
The energy storage charging regulation period can be understood as that in the hot standby state, the energy storage system is converted from the hot standby state to the charging state after receiving the control signal sent by the energy storage side control system until the charging power reaches the rated power P of the energy storage system N And the power deviation is always controlled at a time within the power deviation range. Wherein the power deviation range may be P N Delta, delta represents the allowable deviation limit, the range of delta can be adjusted, and preferably, the range of delta is 2-5.
It will be appreciated that as the battery usage decays, the stored energy charge adjustment period is dynamically changing, requiring dynamic estimation of the stored energy charge adjustment period.
In this embodiment, the average value of the updated energy storage charging adjustment period in the first n days may be calculated in real time, and the average value is used as the energy storage charging adjustment period in the current day. It can be understood that the first n days do not have an energy storage charging adjustment period every day, if the day does not receive the control signal issued by the energy storage side control system, the day does not have an energy storage charging adjustment period, and if the day receives the control signal issued by the energy storage side control system several times, the day has a plurality of energy storage charging adjustment periods.
The first n days are the first n days of the same day, and the first n days of the same day are changed with time. Illustratively, if n is 7, the first n days are 1-7 days when day 8 and, over time, the first n days are 2-8 days when day 9.
In this embodiment, it is detected that overload is not generated in the charging process of the energy storage system of the user side energy storage power station at the current moment, the energy storage side charging power can be subjected to wide adjustment by taking the energy storage charging adjustment period T as a time interval, that is, the interval T is used for carrying out wide adjustment on the energy storage side charging power once, and T is updated in real time, which can be understood as that each wide adjustment interval is calculated in real time; if the charging power of the energy storage side obtained in the wide adjustment process is smaller than the product of the maximum climbing threshold value and the adjusted execution power, the charging power of the energy storage side can be issued to the energy storage side for execution; if the obtained charging power of the energy storage side is greater than the product of the maximum climbing threshold and the adjusted execution power in the wide adjustment process, the charging power of the energy storage side can be updated to be the product and sent to the energy storage side for execution for a period of time, whether overload occurs is continuously detected in the period of time, the step S110 is returned to be executed again once overload occurs, and if overload does not occur in the period of time, the value of the adjusted execution power can be sent to the energy storage side for execution as the value of the charging power of the energy storage side after the period of time.
The adjusted execution power is the difference value between the rated power of the main transformer and the real-time power of the load side, and each energy storage charging adjustment period is calculated once to be adjusted. Load side real-time power P Real-time load Real-time power P for main transformer Main transformer acquisition And energy storage real-time active power P Energy storage collection Is a difference in (c).
And S140, if overload occurs at the current moment, readjusting the value of the charging power of the energy storage side to the lower limit value of the power of the energy storage side, and adjusting the charging power of the energy storage side in real time by taking the real-time updated energy storage charging adjustment period as the adjustment frequency.
In this embodiment, in the process of continuously detecting whether an overload occurs, once the overload is detected, the value of the charging power at the energy storage side may be readjusted to the lower limit value of the power at the energy storage side calculated at the current moment, and the charging power at the energy storage side is adjusted in real time with the real-time updated energy storage charging adjustment period as a time interval, where the specific adjustment process is the same as the adjustment process in step S130, and details thereof are omitted herein. It should be noted that, whether overload occurs is still detected in real time during the adjustment process.
According to the charging power adjustment method provided by the embodiment of the invention, when first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the value of the charging power of the energy storage side is adjusted to the lower limit value of the power of the energy storage side; then detecting whether overload occurs in the charging process of an energy storage system of the energy storage power station at the user side in real time; if overload does not occur at the current moment, the charging power of the energy storage side is adjusted in real time by taking the energy storage charging adjustment period as the adjustment frequency, wherein the energy storage charging adjustment period is the average value of the energy storage charging adjustment periods of the previous n days updated in real time; and if overload occurs at the current moment, readjusting the value of the charging power of the energy storage side to the lower limit value of the power of the energy storage side, and adjusting the charging power of the energy storage side in real time by taking the real-time updated energy storage charging adjustment period as the adjustment frequency. According to the method, the lower limit value of the power of the energy storage side is calculated in real time, the self-adaptive real-time adjustment is carried out on the charging power of the energy storage side in the energy storage charging adjustment period based on the lower limit value of the charging power of the energy storage side when overload occurs, the average power of the energy storage system after overload can be effectively improved, and the energy storage utilization efficiency is improved.
On the basis of the above embodiments, modified embodiments of the above embodiments are proposed, and it is to be noted here that only the differences from the above embodiments are described in the modified embodiments for the sake of brevity of description.
Further, the lower limit value of the power of the energy storage side is the difference value between the rated power of the main transformer and the maximum power of the load side in the preset time period of the previous n days; wherein the preset time period is a charging time period; and if the difference between the maximum overload active power at the main transformer and the maximum power at the load side in the preset time period of the previous n days is smaller than 0, setting the lower limit value of the power at the energy storage side to 0.
If the energy storage system is in the charging period at the current moment, the value of the maximum power on the load side in the charging period in the previous n days can be used as the maximum power value possibly reached on the load side in the charging period in the current day.
It should be noted that, the charge is uniformly set to be negative, the discharge is positive, and since the power is negative during the charge period, the collected data is uniformly set to be positive in order to simplify the intermediate operation process, the flow data is positive, the sign of the flow data is adjusted during the power execution, and the charge is uniformly agreed to be negative.
In this embodiment, the maximum overload active power at the main transformer is a fixed value, so that a difference between the rated power at the main transformer and the maximum power value possibly reached by the load side in the current day charging period can be calculated in real time, and if the difference is greater than or equal to 0, the energy storage side control system can issue a command to the energy storage side to discharge according to the lower limit value of the energy storage side power at the current moment; if the difference is smaller than 0, the lower limit value of the energy storage side power may be set to 0.
Further, the updating mode of the maximum power of the load side in the preset time period of the first n days is as follows: acquiring the maximum power of a load side in a preset time period of the previous n days, and updating the real-time power of the load side in the preset time period; if the maximum power of the load side in the preset time period of the previous n days is larger than the real-time power of the load side, the numerical value of the maximum power of the load side in the preset time period of the previous n days is not updated; and if the maximum power of the load side in the preset time period of the previous n days is smaller than the real-time power of the load side, updating the value of the maximum power of the load side in the preset time period of the previous n days to the value of the real-time power of the load side.
In this embodiment, the maximum power P on the load side in the charging period of the previous n days can be obtained in advance Load max for the first n days Will P Load max for the first n days With load-side real-time power P during charging period Real-time load For comparison, if P Load max for the first n days Greater than P Real-time load P is then Load max for the first n days The value of (2) is not updated; if P Load max for the first n days Less than P Real-time load Then P can be Real-time load Is the value of P Load max for the first n days Is a numerical value of (2). Wherein, n can be set at will, and preferably, the value range of n is 1-7, and the smaller the value of n is, the better.
Further, updating the load side real-time power in the preset time period includes: acquiring real-time power of a main transformer station, which is acquired in real time by a main transformer station, from an electric meter of the main transformer station, and acquiring real-time active power of energy storage, which is acquired in real time by an electric meter of the energy storage side, from an electric meter of the energy storage side; and updating the load side real-time power in the preset time period to be the difference value between the real-time power of the main transformer and the energy storage real-time active power.
Wherein, the real-time power P of the main transformer Main transformer acquisition The energy storage real-time active power P can be acquired through an ammeter at a main transformer Energy storage collection Can be collected by an energy storage side ammeter.
It can be appreciated that, since it is difficult to uniformly access the electric meter to uniformly collect the real-time power of the load side on site, the real-time power P of the load side in the charging period Real-time load Can be expressed as P Real-time load ＝P Main transformer acquisition -P Energy storage collection 。
According to the method, the energy storage side power value in the same time period of n days before the similar days is counted, the energy storage side power can be adaptively adjusted to the minimum value when overload occurs, and the problem that the charging power is immediately adjusted to the preset value when overload occurs in the existing method to cause excessive adjustment is avoided.
Further, the process of updating the energy storage charging adjustment period in real time includes: after the energy storage system receives a control instruction every n days before the day, the energy storage system is converted from a hot standby state to a charging state until the charging power reaches rated power and the power deviation is always controlled to be within the starting time of the power deviation range; taking the counted multiple starting times as energy storage charging adjustment subcycles to form an energy storage charging adjustment cycle set; taking the average value of all the energy storage charging regulation subcycles in the energy storage charging regulation cycle set as an energy storage charging regulation cycle; the above process is repeatedly executed every day to update the energy storage charging adjustment period in real time.
Wherein, the energy storage charging regulation period set T Adjusting period sets ＝{T Conditioning cycle 1 ,T Conditioning cycle 2 ,T Conditioning cycle 3 ,……,T Adjusting period i Calculation of T Adjusting period sets The average value of all the regulating periods in the day can obtain the energy storage charging regulating period of the current day. The above process is repeated every day to recalculate the energy storage charging adjustment period on that day.
Example two
Fig. 3 is a flow chart of a charging power adjustment method according to a second embodiment of the present invention, where the second embodiment is optimized based on the above embodiments. For details not yet described in detail in this embodiment, refer to embodiment one.
As shown in fig. 3, a charging power adjustment method provided in a second embodiment of the present invention includes the following steps:
and S210, when the first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the lower limit value of the energy storage side power is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side.
S220, detecting whether overload occurs in the charging process of the energy storage system of the user side energy storage power station in real time.
And S230, if overload does not occur at the current moment, an energy storage charging adjustment period is spaced, the energy storage side charging power is subjected to one-time wide adjustment according to the adjusted execution power, and the energy storage charging adjustment period is updated in real time.
Specifically, the wide adjustment of the charging power of the energy storage side according to the adjusted execution power in the energy storage charging adjustment period updated in real time includes: the first energy storage charging regulation period is spaced, and the product of the regulated execution power at the current moment and the regulated step length reduced by 100 times is used as the charging power of the energy storage side; and (3) spacing the next energy storage charging regulation period, increasing the regulation step length, and calculating the charging power of the energy storage side according to the increased regulation step length.
Where the adjustment step α may be an integer multiple of 10, illustratively, the initial adjustment step α may be 10, the interval next energy storage charging adjustment period may be increased by 20, and so on. The calculation formula of the charging power of the energy storage side is as follows:
P energy storage side charging power ＝-α*0.01*P Adjusted execution power
And S240, if the charging power of the energy storage side obtained in the wide adjustment process is smaller than a preset value, transmitting the adjusted charging power of the energy storage side to the energy storage side for execution.
Wherein the preset value is the maximum climbing threshold beta and the regulated execution power P After adjustment perform workRate of And the regulated execution power is the difference value between the rated power of the main transformer and the real-time power of the load side.
The calculation formula of the charging power of the energy storage side in the step is as follows:
P energy storage side charging power ＝βP Adjusted execution power
Wherein, the maximum climbing threshold value beta can be determined after verification according to a system test, and preferably, beta can be set to be 0.9.
And S250, if the energy storage side charging power obtained in the wide adjustment process is larger than the preset value, taking the preset value as the value of the energy storage side charging power, and sending the updated energy storage side charging power to the energy storage side so that the energy storage side executes the updated energy storage side charging power within the stable time.
Wherein the stable time is the product of a fixed value and the energy storage charging adjustment time calculated in real time, and the stable time T is the energy storage charging adjustment time T calculated in real time Adjusting the period Ten-integer multiples of (i.e., t=n×t) Adjusting the period The value of N can be an integer multiple of 10, and the specific value can be determined after test verification.
Further, if overload does not occur when the energy storage side executes the updated energy storage side charging power in the stable time, after the stable time is over, the adjusted execution power is sent to the energy storage side for execution as the energy storage side charging power.
If overload occurs when the energy storage side performs the updated charging power of the energy storage side within the stable time, the step S210 is returned to be performed.
And S260, if overload occurs at the current moment, the lower limit value of the power of the energy storage side is used as an adjustment value to be issued to the energy storage side so as to adjust the charging power of the energy storage side, and the charging power of the energy storage side is adjusted in real time in the energy storage charging adjustment period updated in real time.
The second embodiment of the invention provides a charging power adjustment method, which embodies the process of adjusting the charging power of the energy storage side in real time by the energy storage charging adjustment period updated in real time at intervals. The control period cannot be accurately determined when the controller adjusts the energy storage power after overload occurs in the prior art, the situation that the currently received execution power is not executed and another execution power is received is easy to occur, and repeated overload occurs in a short time under extreme conditions. The method provides that the situation of repeated overload in a short time is effectively reduced by limiting the maximum climbing threshold beta and the stabilizing time.
Example III
Fig. 4 is a schematic structural diagram of an energy storage side control system according to a third embodiment of the present invention, where the system is applicable to a situation that an overload occurs in charging an energy storage system of a user side energy storage power station, and the system may be implemented by software and integrated in a control device.
As shown in fig. 4, the apparatus includes: the first adjustment module 110, the detection module 120, the second adjustment module 130, and the second adjustment module 140.
The first adjustment module 110 is configured to send a lower limit value of the power of the energy storage side to the energy storage side as an adjustment value when detecting that an overload occurs for the first time in a charging process of the energy storage system of the user side energy storage power station, so as to adjust the charging power of the energy storage side;
the detection module 120 is configured to detect in real time whether an overload occurs in a charging process of an energy storage system of the user side energy storage power station;
the second adjusting module 130 is configured to adjust, in real time, the energy storage side charging power with the energy storage charging adjustment period as an adjustment frequency if overload does not occur at the current moment, where the energy storage charging adjustment period is a mean value of the energy storage charging adjustment periods of the previous n days updated in real time;
and the third adjusting module 140 is configured to issue the lower limit value of the energy storage side power to the energy storage side as an adjusting value to adjust the energy storage side charging power if overload occurs at the current moment, and adjust the energy storage side charging power in real time with the energy storage charging adjusting period updated in real time as an adjusting frequency.
In this embodiment, when the first adjustment module 110 detects that an overload occurs in the charging process of the energy storage system of the user side energy storage power station, the device sends the lower limit value of the energy storage side power as an adjustment value to the energy storage side for adjusting the charging power of the energy storage side; then detecting whether overload occurs in the charging process of the energy storage system of the user side energy storage power station in real time through the detection module 120; if overload does not occur at the current moment, the second adjusting module 130 adjusts the charging power of the energy storage side in real time by taking the energy storage charging adjusting period as the adjusting frequency, wherein the energy storage charging adjusting period is the average value of the energy storage charging adjusting period of the previous n days updated in real time; if overload occurs at the current moment, the lower limit value of the power of the energy storage side is used as an adjustment value to be sent to the energy storage side by the third adjustment module 140 for adjusting the charging power of the energy storage side, and the charging power of the energy storage side is adjusted in real time by taking the real-time updated energy storage charging adjustment period as the adjustment frequency.
The embodiment provides an energy storage side control system, which can adaptively adjust charging power, effectively improves the average power of an energy storage system after overload, and increases the utilization efficiency of energy storage.
Further, the lower limit value of the energy storage side power is the difference value between the rated power of the main transformer and the maximum power of the load side in the preset time period of the previous n days;
wherein the preset time period is charging time; and if the difference value between the rated power of the main transformer and the maximum power of the load side in the preset time period of the first n days is smaller than 0, setting the lower limit value of the power of the energy storage side to 0.
Based on the optimization, the system further comprises an update calculation module, and the acquisition calculation module comprises:
the first updating unit is used for acquiring the maximum power of the load side in a preset time period of the previous n days and updating the real-time power of the load side in the preset time period;
the calculating unit is used for not updating the numerical value of the maximum power of the load side in the preset time period of the previous n days if the maximum power of the load side in the preset time period of the previous n days is larger than the real-time power of the load side;
and the second updating unit is used for updating the numerical value of the maximum power of the load side in the preset time period of the previous n days to the numerical value of the real-time power of the load side if the maximum power of the load side in the preset time period of the previous n days is smaller than the real-time power of the load side.
Based on the above technical solution, the first updating unit in the updating calculation module is specifically configured to: acquiring real-time power of a main transformer station, which is acquired in real time by a main transformer station, from an electric meter of the main transformer station, and acquiring real-time active power of energy storage, which is acquired in real time by an electric meter of the energy storage side, from an electric meter of the energy storage side; and updating the load side real-time power in the preset time period to be the difference value between the real-time power of the main transformer and the energy storage real-time active power.
Further, the system further comprises a period estimation module for:
after the energy storage system receives a control instruction every n days before the day, the energy storage system is converted from a hot standby state to a charging state until the charging power reaches rated power and the power deviation is always controlled to be within the starting time of the power deviation range;
taking the counted multiple starting times as energy storage charging adjustment subcycles to form an energy storage charging adjustment cycle set;
taking the average value of all the energy storage charging regulation subcycles in the energy storage charging regulation cycle set as an energy storage charging regulation cycle;
the above process is repeatedly executed every day to update the energy storage charging adjustment period in real time.
Further, the second adjustment module 130 includes:
the wide-range adjusting unit is used for spacing an energy storage charging adjusting period, carrying out wide-range adjustment on the charging power of the energy storage side once according to the adjusted execution power, and updating the energy storage charging adjusting period in real time;
the issuing unit is used for issuing the adjusted energy storage side charging power to the energy storage side for execution if the energy storage side charging power obtained in the wide adjustment process is smaller than a preset value;
the adjusting unit is used for taking the preset value as the value of the charging power of the energy storage side and sending the updated charging power of the energy storage side to the energy storage side if the charging power of the energy storage side obtained in the wide adjustment process is larger than the preset value, so that the energy storage side executes the updated charging power of the energy storage side in the stable time;
The preset value is the product of the maximum climbing threshold and the regulated execution power, the regulated execution power is the difference value between the rated power of the main transformer and the real-time power of the load side, and the stable time is the product of a fixed value and the energy storage charging adjustment time calculated in real time.
On the basis of the scheme, the breadth adjusting unit is also used for: the first energy storage charging regulation period is spaced, and the product of the regulated execution power at the current moment and the regulated step length reduced by 100 times is used as the charging power of the energy storage side; and (3) spacing the next energy storage charging regulation period, increasing the regulation step length, and calculating the charging power of the energy storage side according to the increased regulation step length.
On the basis of the scheme, the adjusting unit is further used for: and if overload does not occur when the energy storage side executes the updated energy storage side charging power in the stable time, after the stable time is over, the adjusted execution power is used as the energy storage side charging power and is issued to the energy storage side for execution.
The energy storage side control system can execute the charging power adjustment method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 5 shows a schematic diagram of the structure of a control device 10 that may be used to implement an embodiment of the present invention. The control device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the control 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, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program 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 control device 10 can also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A plurality of components in the control 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, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the control device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the respective methods and processes described above, such as the charging power adjustment method.
In some embodiments, the charging power adjustment method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the control device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the charging power adjustment method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the charging power adjustment method in any other suitable way (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may 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. The computer readable storage medium may 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, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, 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.
To provide for interaction with a user, the systems and techniques described here can be implemented on a control device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the control device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background 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 background, 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: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically 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 called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (11)
1. A method of charging power adjustment, the method comprising:
when the first overload occurs in the charging process of the energy storage system of the user side energy storage power station, the lower limit value of the energy storage side power is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side;
detecting whether overload occurs in the charging process of an energy storage system of the user side energy storage power station in real time;
if overload does not occur at the current moment, the charging power of the energy storage side is adjusted in real time by taking the energy storage charging adjustment period as the adjustment frequency, wherein the energy storage charging adjustment period is the average value of the energy storage charging adjustment periods of the previous n days updated in real time;
And if overload occurs at the current moment, the lower limit value of the power of the energy storage side is used as an adjustment value to be sent to the energy storage side for adjusting the charging power of the energy storage side, and the charging power of the energy storage side is adjusted in real time by taking the energy storage charging adjustment period updated in real time as the adjustment frequency.
2. The method according to claim 1, wherein the lower limit value of the energy storage side power is a difference value between the rated power at the main transformer and the maximum power at the load side in the preset time period of the previous n days;
wherein the preset time period is a charging time period; and if the difference between the rated power of the main transformer and the maximum power of the load side in the preset time period of the previous n days is smaller than 0, setting the lower limit value of the power of the energy storage side to 0.
3. The method of claim 2, wherein the update manner of the load side maximum power in the first n days of the preset time period is:
acquiring the maximum power of a load side in a preset time period of the previous n days, and updating the real-time power of the load side in the preset time period;
if the maximum power of the load side in the preset time period of the previous n days is larger than the real-time power of the load side, the numerical value of the maximum power of the load side in the preset time period of the previous n days is not updated;
And if the maximum power of the load side in the preset time period of the previous n days is smaller than the real-time power of the load side, updating the value of the maximum power of the load side in the preset time period of the previous n days to the value of the real-time power of the load side.
4. The method of claim 3, wherein updating the load side real time power for the preset time period comprises:
acquiring real-time power of a main transformer station, which is acquired in real time by a main transformer station, from an electric meter of the main transformer station, and acquiring real-time active power of energy storage, which is acquired in real time by an electric meter of the energy storage side, from an electric meter of the energy storage side;
and updating the load side real-time power in the preset time period to be the difference value between the real-time power of the main transformer and the energy storage real-time active power.
5. The method of claim 1, wherein the real-time update process of the stored energy charge adjustment period comprises:
after the energy storage system receives a control instruction every n days before the day, the energy storage system is converted from a hot standby state to a charging state until the charging power reaches rated power and the power deviation is always controlled to be within the starting time of the power deviation range;
taking the counted multiple starting times as energy storage charging adjustment subcycles to form an energy storage charging adjustment cycle set;
Taking the average value of all the energy storage charging regulation subcycles in the energy storage charging regulation cycle set as an energy storage charging regulation cycle;
the above process is repeatedly executed every day to update the energy storage charging adjustment period in real time.
6. The method of claim 1, wherein adjusting the energy storage side charging power in real time with the energy storage charging adjustment period as the adjustment frequency comprises:
the energy storage charging adjustment period is spaced, the charging power of the energy storage side is subjected to primary wide adjustment according to the adjusted execution power, and the energy storage charging adjustment period is updated in real time;
if the charging power of the energy storage side obtained in the wide-amplitude adjustment process is smaller than a preset value, the adjusted charging power of the energy storage side is sent to the energy storage side for execution;
if the energy storage side charging power obtained in the wide adjustment process is larger than a preset value, taking the preset value as the value of the energy storage side charging power, and sending the updated energy storage side charging power to the energy storage side so that the energy storage side executes the updated energy storage side charging power in a stable time;
the preset value is the product of the maximum climbing threshold and the regulated execution power, the regulated execution power is the difference value between the rated power of the main transformer and the real-time power of the load side, and the stable time is the product of a fixed value and the energy storage charging adjustment time calculated in real time.
7. The method of claim 6, wherein the performing a wide adjustment of the energy storage side charging power according to the adjusted execution power during the interval energy storage charging adjustment period comprises:
the first energy storage charging regulation period is spaced, and the product of the regulated execution power at the current moment and the regulated step length reduced by 100 times is used as the charging power of the energy storage side;
and (3) spacing the next energy storage charging regulation period, increasing the regulation step length, and calculating the charging power of the energy storage side according to the increased regulation step length.
8. The method according to claim 6, wherein if the energy storage side is not overloaded when the updated energy storage side charging power is performed during the settling time, the adjusted performing power is issued to the energy storage side as the energy storage side charging power after the settling time is completed.
9. An energy storage side control system, the system comprising:
the first adjusting module is used for sending the lower limit value of the power of the energy storage side to the energy storage side as an adjusting value when detecting that the energy storage system of the energy storage power station of the user side is overloaded for the first time in the charging process, and is used for adjusting the charging power of the energy storage side;
The detection module is used for detecting whether overload occurs in the charging process of the energy storage system of the user side energy storage power station in real time;
the second adjusting module is used for adjusting the charging power of the energy storage side in real time in the energy storage charging adjusting period updated in real time if overload does not occur at the current moment, wherein the energy storage charging adjusting period is the average value of the energy storage charging adjusting period of the previous n days updated in real time;
and the third adjusting module is used for sending the lower limit value of the power of the energy storage side to the energy storage side as an adjusting value if overload occurs at the current moment, adjusting the charging power of the energy storage side and adjusting the charging power of the energy storage side in real time in an energy storage charging adjusting period updated in real time.
10. A control apparatus, characterized in that the control apparatus comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the charging power adjustment method of any one of claims 1-8.
11. A computer readable storage medium storing computer instructions for causing a processor to implement the charging power adjustment method of any one of claims 1-8 when executed.
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