CN116760082A - Control method and device for energy storage discharge power and energy storage equipment - Google Patents
Control method and device for energy storage discharge power and energy storage equipment Download PDFInfo
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- CN116760082A CN116760082A CN202310882925.2A CN202310882925A CN116760082A CN 116760082 A CN116760082 A CN 116760082A CN 202310882925 A CN202310882925 A CN 202310882925A CN 116760082 A CN116760082 A CN 116760082A
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- 230000005611 electricity Effects 0.000 description 15
- 238000007599 discharging Methods 0.000 description 11
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
The application discloses a control method, a device and energy storage equipment for energy storage discharge power, which belong to the technical field of energy storage, and the application obtains the current actual power consumption of a user and predicts the average power supply power of a power grid in a preset demand control period after entering a preset peak period; judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not; and determining the discharge power of the energy storage device in the current demand control period. The maximum demand is larger than the predicted average power grid power supply power, and the predicted average power grid power supply power can be used as a reference for determining the discharge power of the energy storage device in the current demand control period.
Description
Technical Field
The present application relates to the field of energy storage technologies, and in particular, to a method and an apparatus for controlling energy storage discharge power, and an energy storage device.
Background
Because the electricity consumption habit of the power consumer is relatively fixed, the electricity consumption period in one day is divided into a peak period, a normal period and a valley period, and for the whole power grid, the power supply and the power supply required to be provided for the whole consumer in the peak period are far greater than those required to be provided for the whole consumer in the valley period. The power supply power of the power grid in the peak period and the valley period is too large in phase difference, so that the balance stability of the power generation and the power consumption of the whole power grid can be jeopardized, the utilization rate of power grid equipment and power generation equipment can be reduced, and the investment cost of the power grid equipment and the power generation equipment can be increased. In order to enable the power grid to stably run, peak-valley difference of the power grid can be relieved through peak clipping and valley filling, a power grid load curve is smoothed, specifically, electric energy is stored in a valley period through energy storage equipment, and released in a peak period, so that the power supply power provided by the power grid is required by the whole user in the peak period and the power supply power provided by the power grid is required by the whole user in the valley period to be consistent. Most of energy storage equipment built by investment of power users at present adopts the peak clipping and valley filling operation mode.
There is also a fluctuation in the power consumption of the power consumer in the peak period, for example, the peak period is 8-12 points, but the power consumption of the consumer in the 11-12 point period may be higher than the power consumption of the consumer in the 8-9 points, that is, the maximum demand of the consumer may occur in the 11-12 points in the peak period. According to the current standard in China, the electricity consumption requirement of an electric power user refers to an average value of power supply power (active power) of a power grid, which is obtained from the power grid by the user within 15 continuous minutes, and is obtained through real-time monitoring and statistics of operation data of a transformer at a demarcation point of the user and the power grid, and is generally calculated by adopting a slip method. The maximum value of the electricity consumption is the maximum demand. If the maximum demand of the power consumer is too high, the difference between the highest load and the lowest load of the power supply of the power grid in the peak period is possibly too large, and the balance stability of the power generation and the power consumption of the whole power grid can be endangered, the utilization rate of power grid equipment and power generation equipment is reduced, and the investment cost of the power grid equipment and the power generation equipment is increased. Therefore, in order to ensure the smooth operation of the power grid in the peak period, the energy storage discharge power (the discharge power of the energy storage device) of the peak clipping operation can be set so as to reduce the maximum possible demand in the process of using electricity by the user in the peak period in a targeted manner.
At present, a method for controlling the maximum demand of a power consumer is generally based on historical experience, a complete peak period is divided into a plurality of sub-periods in advance, a fixed energy storage and discharge power is set for each sub-period, and the maximum demand which can occur is controlled by the energy storage device according to the fixed power discharge in the fixed period.
However, since the power consumption of the user at different time points in the peak period is not fixed and cannot be accurately predicted (the time point when the maximum demand occurs cannot be determined), setting a fixed energy storage and discharge power in a fixed period can ensure that the energy storage device realizes normal peak clipping operation, but the energy storage device cannot be better utilized to realize the reduction of the maximum demand in the peak period, so that the load curve of the power grid cannot be better smoothed, and the fluctuation of the power supply power of the whole power grid is reduced. Therefore, the related art has a problem that the control efficiency of the stored energy discharge power is low.
Disclosure of Invention
The application mainly aims to provide a control method and device for energy storage discharge power and energy storage equipment, and aims to solve the technical problem of low control efficiency of the energy storage discharge power.
In order to achieve the above object, the present application provides a control method of energy storage discharge power, the control method of energy storage discharge power comprising the steps of:
Acquiring the current actual power consumption of a user and the predicted average power supply power of a power grid in a preset demand control period after entering a preset peak period;
judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not;
and determining the discharge power of the energy storage device in the current demand control period.
In one possible embodiment of the present application, the actual power consumption is a sum of a power supply power of the power grid currently obtained by the user from the power grid and a current discharge power of the energy storage device, and the predicted average power supply power of the power grid is a historical average of power supply powers of the power grid obtained by the user from the power grid in a plurality of same peak periods.
In one possible embodiment of the present application, after the step of obtaining the current actual power used by the user and the predicted average power supplied by the grid in the preset demand control period after entering the preset peak period, the control method further includes:
and calculating the reference discharge power of the energy storage device based on the remaining dischargeable amount of the energy storage device and the first remaining duration of the preset peak time.
In one possible embodiment of the present application, the step of determining the discharge power of the energy storage device in the current demand control period includes:
And if the current actual power consumption of the user is larger than the predicted average power grid power supply power, determining the discharge power of the energy storage equipment in the current demand control period as the reference discharge power.
In one possible embodiment of the present application, the step of determining the discharge power of the energy storage device in the current demand control period includes:
if the current actual power of the user is not greater than the predicted average power grid power supply power, calculating a preset energy storage discharge power;
the preset energy storage discharge power is determined based on the residual dischargeable quantity and a second residual duration of a peak time period after a current demand control period;
judging whether the preset energy storage discharge power is larger than rated discharge power of the energy storage equipment or not;
and determining the discharge power of the energy storage device in the current demand control period.
In one possible embodiment of the present application, the step of determining the discharge power of the energy storage device in the current demand control period includes:
if the preset energy storage discharge power is larger than the rated discharge power of the energy storage device, calculating the minimum discharge power of the energy storage device required to be discharged in the current demand control period based on the residual dischargeable amount of the energy storage device, the second residual duration, the rated discharge power and the demand control period;
And determining the discharge power of the energy storage device in the current demand control period as the minimum discharge power.
In one possible embodiment of the present application, the step of determining the discharge power of the energy storage device in the current demand control period includes:
and if the preset energy storage discharge power is not greater than the rated discharge power of the energy storage equipment, determining that the discharge power of the energy storage equipment in the current demand control period is 0.
In one possible embodiment of the present application, before the step of determining whether the current actual power consumption of the user is greater than the predicted average power supply power, the method further includes:
determining whether the preset demand control period is in a preset peak period or not every other preset demand control period;
if not, after entering the next peak period, continuing to execute the step of judging whether the current actual power of the user is greater than the predicted average power supply power of the power grid.
The application also provides a control device of the energy storage discharge power, which realizes the steps of the control method of the energy storage discharge power.
The present application also provides an energy storage device comprising:
the control device for energy storage discharge power according to claim 9.
Compared with the prior art that the time point of the maximum demand cannot be determined, the control method for the energy storage discharge power provided by the application has the advantages that the energy storage device can be ensured to realize normal peak clipping operation while the discharge power of the energy storage device is set at a fixed time period, and the problem that the maximum demand in the peak time period cannot be reduced by using the energy storage device to the greatest extent can be solved. The method comprises the steps of obtaining the current actual power consumption of a user and the predicted average power supply power of a power grid in a preset demand control period after entering a preset peak period; judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not; and determining the discharge power of the energy storage device in the current demand control period.
According to the background technology, the maximum demand is the maximum value of average power supply power of the power grid obtained by the user from the power grid in all continuous demand periods in the month, and the actual power used by the user at different moments inevitably fluctuates, so that the maximum demand is larger than the predicted average power supply power of the power grid, the predicted average power supply power can be used as a reference for determining the discharge power of the energy storage device in the current demand control period, and the discharge power of the energy storage device in the current demand control period is determined based on the current actual power used by the user and the predicted average power supply power, so that the control efficiency of the energy storage discharge power can be improved.
Drawings
FIG. 1 is a flow chart of a first embodiment of a method for controlling energy storage discharge power according to the present application;
fig. 2 is a schematic diagram of a first scenario of a method for controlling energy storage discharge power according to a first embodiment of the present application;
FIG. 3 is a logic structure diagram of a control method of energy storage discharge power according to a first embodiment of the present application;
fig. 4 is a schematic structural diagram of a control device for energy storage and discharge power in a hardware operating environment according to an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. Although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein.
An embodiment of the present application provides a method for controlling energy storage discharge power, referring to fig. 1 and fig. 3, in this embodiment, the method for controlling energy storage discharge power includes:
Step S10: acquiring the current actual power consumption of a user and the predicted average power supply power of a power grid in a preset demand control period after entering a preset peak period;
step S20: judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not;
step S30: and determining the discharge power of the energy storage device in the current demand control period.
As an example, the method of controlling the energy storage discharge power is applied to a control device of the energy storage discharge power, which is subordinate to a control apparatus of the energy storage discharge power.
As an example, the control device for storing and discharging power may be an energy storing device, or may be other devices for controlling an energy storing device, etc., which is not limited herein.
In this embodiment, the energy storage device includes:
a control device for energy storage and discharge power as described above;
as an example, referring to fig. 2, the energy storage device is connected to the upper power grid through a transformer, and other power consumers 1, 2 and 3 and … … n used by the user are connected to the same upper power grid except for the energy storage device.
As an example, to enable a grid to operate stably, peak-valley differences of the grid can be relieved by peak clipping and valley filling, a load curve of the grid is smoothed, specifically, electric energy is stored in a valley period through an energy storage device, electric energy is released in a peak period, and power supply power required by the grid by a user in the peak period and power supply power required by the grid by the user in the valley period are consistent.
As an example, the maximum demand of a month user may be impacted by the energy storage device during peak clipping and valley filling. Specifically, during peak hours, the energy storage device realizes peak clipping operation through discharging, and if the maximum demand occurs during peak hours, the maximum demand may be reduced by discharging the energy storage device; in the usual period, the energy storage device is not charged and discharged and is in a standby state, and if the maximum demand occurs in the usual period, the energy storage device does not influence the maximum demand; during off-peak hours, the "off-peak operation" is achieved by charging the energy storage device, which may result in an increase in maximum demand if the maximum demand occurs during off-peak hours. However, for most users, peak power usage will be higher than valley power usage, and therefore, for most users, the maximum demand will occur during peak hours.
However, there is also a fluctuation in the power consumption of the power consumer in the peak period, for example, the peak period is 8 to 12 points, but the power consumption of the consumer in the 11 to 12 point period may be higher than the power consumption of the consumer in the 8 to 9 points, that is, the maximum demand of the consumer may occur in the 11 to 12 points in the peak period. According to the current standard in China, the electricity consumption requirement of an electric power user refers to an average value of power supply power (active power) of a power grid, which is obtained from the power grid by the user within 15 continuous minutes, and is obtained through real-time monitoring and statistics of operation data of a transformer at a demarcation point of the user and the power grid, and is generally calculated by adopting a slip method. The maximum value of the electricity consumption is the maximum demand. If the maximum demand of the power consumer is too high, the difference between the highest load and the lowest load of the power supply of the power grid in the peak period is possibly too large, and the balance stability of the power generation and the power consumption of the whole power grid can be endangered, the utilization rate of power grid equipment and power generation equipment is reduced, and the investment cost of the power grid equipment and the power generation equipment is increased. Therefore, in order to ensure the stable operation of the power grid in the peak period, the energy storage and discharge power of the peak clipping operation can be set so as to reduce the maximum possible demand in the power utilization process of the user in the peak period in a targeted manner. At present, a method for controlling the maximum demand of a power consumer is generally based on historical experience, a complete peak period is divided into a plurality of sub-periods in advance, a fixed energy storage and discharge power is set for each sub-period, and the maximum demand which can occur is controlled by the energy storage device according to the fixed power discharge in the fixed period. For example, the energy storage device is preset to have a discharge power of P1, a discharge power of P2, a discharge power of P3, a discharge power of P4, a discharge power of P5, a discharge power of P6, a discharge power of P7, and a discharge power of P8:00-20:00, and a discharge power of P20:00-21:00 at 8:00-12:00, and a discharge power of 8:00-12:00 in the first peak period, and a discharge power of 17:00-21:00 in the second peak period of 8:00-9:00. The period of setting the discharge power may be further subdivided.
However, since the power consumption of the user at different time points in the peak period is not fixed and cannot be accurately predicted (the time point when the maximum demand occurs cannot be determined), setting a fixed energy storage and discharge power in a fixed period can ensure that the energy storage device realizes normal peak clipping operation, but the energy storage device cannot be better utilized to realize the reduction of the maximum demand in the peak period, so that the load curve of the power grid cannot be better smoothed, and the fluctuation of the power supply power of the whole power grid is reduced. Therefore, the related art has a problem that the control efficiency of the stored energy discharge power is low.
The present embodiment aims at: because the maximum demand is the maximum value of the average power supply power of the power grid obtained by the user in all continuous demand periods in the month, and the actual power used by the user at different moments inevitably fluctuates, the maximum demand is larger than the predicted average power supply power, the predicted average power supply power can be used as a reference for determining the discharge power of the energy storage device in the current demand control period, and the discharge power of the energy storage device in the current demand control period is determined based on the current actual power used by the user and the predicted average power supply power, so that the control efficiency of the energy storage discharge power can be improved.
The method comprises the following specific steps:
step S10: acquiring the current actual power consumption of a user and the predicted average power supply power of a power grid in a preset demand control period after entering a preset peak period;
as an example, the preset peak period is a peak period of electricity consumption in one day, specifically, may be divided based on historical electricity consumption data, or may be determined based on peak periods issued by a local authority or a power supply company, which is not limited herein.
As an example, the preset demand control period t refers to control of the energy storage discharge power once every interval time t.
Specifically, the shorter the preset demand control period t, the more accurate the control of the stored energy discharge power due to the fluctuation of the actual electric power used by the user. The minimum value of the preset demand control period t may be based on a detection and refresh period of the actual power used by the user, which may be determined by the hardware performance of the detection device and manually set parameters, without limitation.
In this embodiment, the actual power is the sum of the power supply power of the power grid currently obtained by the user from the power grid and the current discharge power of the energy storage device. Specifically, if the current discharging power of the energy storage device is zero, the actual power of the user is provided by the power grid, so that when the energy storage device discharges, the power ratio provided by the power grid in the actual power of the user is reduced, and the power supply pressure of the power grid is reduced.
In this embodiment, the predicted average grid power supply power is a historical average of grid power supply power that the user obtains from the grid during a plurality of identical peak hours. Specifically, the plurality of identical peak periods refer to a plurality of peak periods identical to the preset peak period, and the predicted average grid power pta=average of the grid power supply amounts of the plurality of identical peak periods/the total duration of the preset peak period.
Step S20: judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not;
as an example, determining whether the current actual power of the user is greater than the predicted average power supply power may be determining whether the current actual power of the user is greater than the predicted average power supply power once every a preset demand control period t, specifically, detecting and refreshing the current actual power of the user once every a time interval t, and determining whether the current actual power of the user is greater than the predicted average power supply power once.
As an example, since the control of the energy storage discharge power is performed every time the demand control period t, the current demand control period refers to the mth demand control period.
In this embodiment, since the maximum required amount is constantly greater than or equal to the average power supply power of the power grid, and the actual power used by the user inevitably fluctuates, it can be known that the maximum required amount is constantly greater than the average power supply power of the power grid. Meanwhile, since the electricity consumption in the preset peak period is the result of the energy storage device after the peak clipping operation is completed (the actual electricity consumption of the user is the sum of the power supply power of the power grid obtained by the user from the power grid at present and the current discharge power of the energy storage device), the average power supply power of the power grid is the lowest value of the maximum demand which can be possibly achieved by controlling the maximum demand through the energy storage device. Thus, the predicted average grid power Pta may be taken as a reference value for adjusting the discharge power of the energy storage device.
That is, it is possible to determine whether the actual electric power is likely to be the maximum demand by determining whether the actual electric power currently used by the user is greater than the predicted average grid power Pta. Specifically, since the maximum required amount is constantly larger than the average power grid power supply power, if the current actual power consumption of the user is larger than the predicted average power grid power supply power Pta, the actual power consumption may be the maximum required amount, and if the current actual power consumption of the user is not larger than the predicted average power grid power supply power Pta, the actual power consumption may not be the maximum required amount.
In this embodiment, after the step of obtaining the current actual power consumption of the user and the predicted average power supply power of the power grid in the preset demand control period after entering the preset peak period, the control method further includes:
step S40: and calculating the reference discharge power of the energy storage device based on the remaining dischargeable amount of the energy storage device and the first remaining duration of the preset peak time.
As an example, when the maximum demand occurs, the stored discharge power does not increase accordingly, and the opportunity to decrease the maximum demand may be missed. Therefore, it is necessary to determine the discharge power of the current demand control period before discharging to achieve the maximum demand reduction with the energy storage device.
As an example, the remaining dischargeable amount Rdp of the energy storage device refers to the remaining dischargeable amount of electricity stored in the energy storage device.
As an example, the first remaining duration of the preset peak period refers to a difference between the total duration of the preset peak period and (m-1) preset demand control periods t. That is, the first remaining period rt1=total period of preset peak period- (m-1) ×preset demand control period t. It will be appreciated that the first remaining period Rt1 is at most equal to the total period of the preset peak period.
As an example, the reference discharge power Ps of the energy storage device is determined based on the remaining dischargeable amount Rdp of the energy storage device and the first remaining duration Rt1 of the preset peak period, and may be calculated based on the remaining dischargeable amount Rdp of the energy storage device and the first remaining duration Rt1 of the preset peak period, and specifically, the reference discharge power ps=the remaining dischargeable amount Rdp/the first remaining duration Rt1. As an example, the energy storage device discharges based on the reference discharge power in the current demand control period without missing the opportunity to reduce the maximum demand.
In this embodiment, the reference discharge power of the energy storage device is calculated based on the remaining dischargeable amount of the energy storage device and the first remaining duration of the preset peak period, so that the time for reducing the maximum required amount is not missed, and the control efficiency of the energy storage discharge power is improved.
Step S30: and determining the discharge power of the energy storage device in the current demand control period.
As an example, since the time of occurrence of the maximum demand cannot be accurately predicted in the current electricity utilization process of the user, when it is judged that the maximum demand is likely to occur, the energy storage device is controlled to discharge in the current demand control period, so that the power supply provided by the current power grid for the user can be reduced. When it is judged that the maximum demand is unlikely to occur, it is determined that the actual electric power is unlikely to be the maximum demand.
In this embodiment, the step of determining the discharge power of the energy storage device in the current demand control period includes:
step A1: and if the current actual power consumption of the user is larger than the predicted average power grid power supply power, determining the discharge power of the energy storage equipment in the current demand control period as the reference discharge power.
As an example, if the current actual electric power of the user is greater than the predicted average grid supply power Pta, the actual electric power may be the maximum demand, and if it is determined that the actual electric power may not be the maximum demand, the energy storage device is controlled to be not discharged or to be less discharged, so that the electric quantity of the energy storage device may be reserved for the discharge when the maximum demand occurs. The energy storage device discharges based on the reference discharge power in the current demand control period, and the time for reducing the maximum demand is not missed.
In this embodiment, the maximum demand is greater than the predicted average power supply power, and the predicted average power supply power may be used as a reference for determining the discharge power of the energy storage device in the current demand control period. And calculating the reference discharge power of the energy storage equipment based on the residual dischargeable amount of the energy storage equipment and the first residual duration of the preset peak time, so that the opportunity of reducing the maximum required amount is not missed, and the control efficiency of the energy storage discharge power is improved.
Further, according to the above embodiment of the present application, there is provided another embodiment of the present application, wherein the step of determining the discharge power of the energy storage device in the current demand control period includes:
step S50: if the current actual power of the user is not greater than the predicted average power grid power supply power, calculating a preset energy storage discharge power;
in this embodiment, the preset energy storage discharge power is determined based on the remaining dischargeable amount and a second remaining duration of a peak period after the current demand control period.
As an example, since the maximum demand is constantly greater than the average grid power supply, if the current actual power of the user is not greater than the predicted average grid power supply Pta, it is determined that the actual power is unlikely to be the maximum demand, and a preset energy storage discharge power is calculated.
As an example, the preset energy storage discharge power is calculated based on the remaining dischargeable amount and a second remaining duration of a peak period after the end of the current demand control period.
As an example, the second remaining period rt2=the first remaining period rt1 of the peak period after the current demand control period-the preset demand control period t.
As an example, the energy storage discharge power pp=the remaining dischargeable amount Rdp/the second remaining period Rt2 is preset. It can be understood that the preset energy storage discharge power Pp corresponds to a maximum discharge power required for the energy storage device to fully discharge the remaining dischargeable amount in the second remaining period of time.
Step S60: judging whether the preset energy storage discharge power is larger than rated discharge power of the energy storage equipment or not;
as an example, the rated discharge power Pe of the energy storage device refers to the maximum allowable discharge power at which the energy storage device stably operates for a long period of time.
As an example, the setting of the respective discharge powers of the energy storage device for the respective sub-periods within any one peak period needs to satisfy at least two conditions: the first and all set discharge powers cannot exceed rated discharge power Pe of the energy storage equipment; secondly, under the combined action of all set discharge powers, the residual dischargeable quantity in the energy storage device can be ensured to be completely discharged when the peak period is finished, so that the peak clipping due effect is ensured.
As an example, the rated power of the energy storage device must be able to ensure that the peak clipping should be effective, i.e. when the respective discharge powers of the energy storage device in the respective sub-periods within any one peak period are set to the rated discharge power of the energy storage device, it must be able to ensure that the remaining dischargeable amount in the energy storage device has been fully discharged at the end of that peak period.
As an example, since it is determined that the actual electric power may not be the maximum demand, it may be selected not to discharge through the energy storage device, otherwise, if the maximum demand occurs after the end of the current demand control period, a large portion of the dischargeable amount of the energy storage device may have been released before or during the current demand control period, resulting in an inability to further reduce the maximum demand by increasing the energy storage discharge power after the end of the current demand control period. However, since it is required to ensure that the remaining dischargeable amount in the energy storage device has been completely discharged at the end of any one of the peak periods, when it is determined that the actual power consumption is unlikely to be the maximum required amount, it is required to determine whether the energy storage device has the capability of discharging the remaining dischargeable amount completely within the second remaining period, and therefore, it is required to determine whether the preset energy storage discharge power is greater than the rated discharge power of the energy storage device, thereby determining whether the energy storage device needs to be discharged in the current required amount control period.
Step S70: and determining the discharge power of the energy storage device in the current demand control period.
As one example, it is determined whether the preset energy storage discharge power exceeds a rated discharge power of the energy storage device.
As an example, if the preset energy storage discharge power is not greater than the rated discharge power of the energy storage device, it is considered that the discharge is performed at a power lower than the rated discharge power of the energy storage device in the second remaining period, and the remaining dischargeable amount can be completely discharged. If the preset energy storage discharge power is greater than the rated discharge power of the energy storage device, the remaining dischargeable amount cannot be completely discharged even if the discharge is performed at the rated discharge power within the second remaining duration.
In this embodiment, the step of determining the discharge power of the energy storage device in the current demand control period includes:
step B1: if the preset energy storage discharge power is larger than the rated discharge power of the energy storage device, calculating the minimum discharge power of the energy storage device required to be discharged in the current demand control period based on the residual dischargeable amount of the energy storage device, the second residual duration, the rated discharge power and the demand control period;
As an example, if the preset energy storage discharge power is greater than the rated discharge power of the energy storage device, it is determined that the energy storage device needs to be discharged in the current demand control period.
As an example, if the preset stored energy discharge power is greater than the rated discharge power of the energy storage device, it is considered that the remaining dischargeable amount cannot be completely discharged within the second remaining period of time, and thus, the energy storage device is required to start discharging within the current demand control period.
In this embodiment, if the preset energy storage discharge power is greater than the rated discharge power of the energy storage device, the minimum discharge power of the energy storage device required to be discharged in the current demand control period is calculated based on the remaining dischargeable amount of the energy storage device, the second remaining duration, the rated discharge power, and the demand control period.
As an example, while the energy storage device is required to start discharging during the current demand control period, the amount of electricity should be discharged as little as possible, which may otherwise result in the energy storage device failing to provide enough electricity to reduce the maximum demand when the maximum demand occurs during the second remaining period, and thus, the minimum discharge power that the energy storage device needs to discharge during the current demand control period needs to be calculated based on the remaining dischargeable amount of the energy storage device, the second remaining period, the rated discharge power, and the demand control period, for the energy storage device to discharge during the current demand control period based on the minimum discharge power.
Specifically, the minimum discharge power pmin= (the remaining dischargeable amount Rdp-the second remaining period rt2×the rated discharge power Pe)/the preset demand control period t. And the minimum discharge power is the minimum value of the discharge power of the energy storage device which can be set in the current demand control period on the premise that the energy storage device completely releases the residual dischargeable quantity in the second residual duration. It can be understood that the minimum discharge power Pmin is not necessarily greater than the rated discharge power Pe of the energy storage device on the premise that the rated power of the energy storage device is necessarily capable of ensuring the peak clipping due effect.
Step B2: and determining the discharge power of the energy storage device in the current demand control period as the minimum discharge power.
As an example, the energy storage device discharges based on the minimum discharge power in the current demand control period, so that the energy storage device discharges with the rated discharge power in the second remaining period can be realized, thereby ensuring that the maximum demand can be reduced to the greatest extent when the maximum demand occurs.
As an example, the energy storage device performs the discharge based on the minimum discharge power in the current demand control period, so that it can not only ensure that the energy storage discharge power does not exceed the rated discharge power in the current demand control period, but also ensure that the energy storage discharge power does not exceed the rated discharge power in the second remaining period, so as to ensure that the energy storage discharge power does not exceed the rated discharge power in the first remaining period, that is, the energy storage discharge power does not exceed the rated discharge power in the total period of the preset peak period.
In this embodiment, the step of determining the discharge power of the energy storage device in the current demand control period includes:
step C1: and if the preset energy storage discharge power is not greater than the rated discharge power of the energy storage equipment, determining that the discharge power of the energy storage equipment in the current demand control period is 0.
In this embodiment, it is determined that the discharge power of the energy storage device in the current demand control period is 0, that is, it is determined that the energy storage device does not need to be discharged in the current demand control period, and the energy storage device is controlled not to be discharged in the current demand control period.
As an example, if the preset energy storage discharge power is not greater than the rated discharge power of the energy storage device, it is considered that the energy storage device has the capability of discharging the remaining dischargeable amount entirely within the second remaining period, that is, it is determined that the energy storage device does not need to discharge in the current demand control period, so as to ensure that the remaining dischargeable amount of the energy storage device is not wasted, and it is ensured that more electric quantity can be discharged when the maximum demand occurs within the second remaining period, thereby reducing the maximum demand to a greater extent.
As an example, the energy storage device is controlled not to discharge in the current demand control period, and the energy storage discharge power may be set to zero, or measures such as shutdown may be taken, which is not limited herein.
In this embodiment, by determining whether the preset energy storage discharge power is greater than the rated discharge power of the energy storage device, if the preset energy storage discharge power is not greater than the rated discharge power of the energy storage device, determining that the energy storage device does not need to discharge in the current demand control period, and controlling the energy storage device not to discharge in the current demand control period; if the preset energy storage discharge power is larger than the rated discharge power of the energy storage device, the energy storage device is determined to be required to discharge in the current demand control period, and the discharge power of the energy storage device to discharge in the current demand control period is further determined, so that the situation that the residual dischargeable quantity cannot be completely discharged in the second residual duration is prevented, the peak clipping effect is reduced, the probability that the energy storage device concentrates the electric quantity to the maximum demand for discharging is improved to the greatest extent, and the control efficiency of controlling the maximum demand through the energy storage device is improved.
Further, according to the above embodiment of the present application, there is provided another embodiment of the present application, wherein before the step of determining whether the current actual electric power used by the user is greater than the predicted average electric power supply power, the method further includes:
step S30: determining whether the preset demand control period is in a preset peak period or not every other preset demand control period;
as an example, since the preset peak period is a period of time, there is a time when the preset peak period ends, and when the preset peak period ends, the control of the energy storage and discharge power is stopped, and therefore, it is required to determine whether the current time is within the preset peak period every the preset demand control period, where the current time refers to the time when the current demand control period is located.
Step S40: if not, after entering the next peak period, continuing to execute the step of judging whether the current actual power of the user is greater than the predicted average power supply power of the power grid.
As an example, if the current time is not within the preset peak period, it is indicated that the preset peak period has ended, control of the energy storage discharge power is stopped, and the next peak period is waited.
As an example, the next peak period may be the next same period as the preset peak period, or may be a different peak period determined based on a change in different dates in different months. For example, if the current preset peak period is a peak period during a weekday, the next peak period may be different from the current peak period.
Therefore, if it is detected that the next peak period is different from the current peak period, it is required to determine whether the current actual power consumption of the user is greater than the corresponding predicted average power supply power of the power grid based on the preset demand control period corresponding to the peak period after entering the peak period, specifically, the corresponding demand control period is set in advance based on the different peak periods, and the corresponding predicted average power supply power of the power grid is calculated based on the different peak periods.
As an example, if the next peak period is the same as the current peak period, the step of determining whether the current actual power is greater than the predicted average power supply power of the power grid based on the preset demand control period is further performed.
In this embodiment, determining whether the preset demand control period is within a preset peak period by every other preset demand control period; if the current actual power is not greater than the predicted average power supply power, the energy storage and discharge power can be continuously controlled, and the control efficiency of the energy storage and discharge power is improved.
The application also provides a control device for energy storage discharge power, referring to fig. 4, fig. 4 is a schematic device structure diagram of a hardware operation environment according to an embodiment of the application.
As shown in fig. 4, the control device for energy storage discharge power may include: a processor 1001, a memory 1005, and a communication bus 1002. The communication bus 1002 is used to enable connected communication between the processor 1001 and the memory 1005.
Optionally, the control device for the energy storage discharge power may further include a user interface, a network interface, a camera, an RF (Radio Frequency) circuit, a sensor, a WiFi module, and so on. The user interface may include a Display, an input sub-module such as a Keyboard (Keyboard), and the optional user interface may also include a standard wired interface, a wireless interface. The network interface may include a standard wired interface, a wireless interface (e.g., WI-FI interface).
It will be appreciated by those skilled in the art that the control device structure of the energy storage discharge power shown in fig. 4 does not constitute a limitation of the control device of the energy storage discharge power, and may include more or less components than illustrated, or may combine certain components, or a different arrangement of components.
As shown in fig. 4, an operating system, a network communication module, and a control program of the energy storage discharge power may be included in the memory 1005 as one type of storage medium. The operating system is a program of control device hardware and software resources that manages and controls the energy storage discharge power, supporting the operation of the control program of the energy storage discharge power and other software and/or programs. The network communication module is used to implement communication between the components within the memory 1005 and other hardware and software in the control system for the stored energy discharge power.
In the control device for energy storage and discharge power shown in fig. 4, the processor 1001 is configured to execute a control program for energy storage and discharge power stored in the memory 1005, to implement the steps of the control method for energy storage and discharge power described above.
The specific implementation manner of the control device of the energy storage discharge power is basically the same as that of each embodiment of the control method of the energy storage discharge power, and is not repeated here.
The application also provides a control device of energy storage discharge power, which realizes the steps of the control method of energy storage discharge power according to any one of claims 1 to 8; specifically, the device comprises:
the acquisition module is used for acquiring the current actual power consumption of the user and the predicted average power supply power of the power grid in a preset demand control period after entering a preset peak period;
the discharging judgment module is used for judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not;
and the first discharge power determining module is used for determining the discharge power of the energy storage device in the current demand control period.
Optionally, in one possible embodiment of the present application, the actual power consumption is a sum of a power grid power supply power currently obtained by the user from a power grid and a current discharge power of the energy storage device, and the predicted average power grid power supply power is a historical average of power grid power supply powers obtained by the user from the power grid in a plurality of same peak periods.
Optionally, in a possible embodiment of the present application, after the step of obtaining the current actual power used by the user and the predicted average grid power supply power in the preset demand control period after entering the preset peak period, the apparatus further includes:
And the second discharge power determining module is used for calculating the reference discharge power of the energy storage device based on the residual dischargeable amount of the energy storage device and the first residual duration of the preset peak time.
Optionally, in one possible embodiment of the present application, the first discharge power determining module includes:
and the first discharge power determining submodule is used for determining the discharge power of the energy storage equipment in the current demand control period as the reference discharge power if the current actual power of the user is larger than the predicted average power grid power supply power.
Optionally, in one possible embodiment of the present application, the first discharge power determining module includes:
the discharge power calculation sub-module is used for calculating preset energy storage discharge power if the current actual power of the user is not greater than the predicted average power grid power supply power;
the preset energy storage discharge power is determined based on the residual dischargeable quantity and a second residual duration of a peak time period after a current demand control period;
the discharge demand determining submodule is used for judging whether the preset energy storage discharge power is larger than rated discharge power of the energy storage equipment or not;
And the second discharge power determination submodule is used for determining the discharge power of the energy storage device in the current demand control period.
Optionally, in one possible embodiment of the present application, the first discharge power determining module includes:
the minimum discharge power calculation sub-module is configured to calculate, if the preset energy storage discharge power is greater than the rated discharge power of the energy storage device, a minimum discharge power of the energy storage device that needs to be discharged in a current demand control period based on a remaining dischargeable amount of the energy storage device, the second remaining duration, the rated discharge power, and the demand control period;
and the third discharge power determining submodule is used for determining the discharge power of the energy storage device in the current demand control period to be the minimum discharge power.
Optionally, in one possible embodiment of the present application, the first discharge power determining module includes:
and the fourth discharge power determining submodule is used for determining that the discharge power of the energy storage equipment in the current demand control period is 0 if the preset energy storage discharge power is not larger than the rated discharge power of the energy storage equipment.
Optionally, in a possible implementation manner of the present application, before the step of determining whether the current actual electric power used by the user is greater than the predicted average power supply power, the apparatus further includes:
the time period determining module is used for determining whether the preset demand control period is in a preset peak time period or not every other preset demand control period;
and the continuous execution module is used for continuously executing the step of judging whether the current actual power used by the user is greater than the predicted average power supply power of the power grid after entering the next peak period if the current actual power used by the user is not within the preset peak period.
The specific implementation manner of the control device for energy storage discharge power of the present application is basically the same as the above embodiments of the control method for energy storage discharge power, and will not be described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A method for controlling energy storage discharge power, the method comprising the steps of:
acquiring the current actual power consumption of a user and the predicted average power supply power of a power grid in a preset demand control period after entering a preset peak period;
judging whether the current actual power consumption of the user is larger than the predicted average power grid power supply power or not;
and determining the discharge power of the energy storage device in the current demand control period.
2. The method of claim 1, wherein the actual power is a sum of a grid power currently obtained by the user from a grid and a current power discharged by the energy storage device, and the predicted average grid power is a historical average of grid power obtained by the user from the grid at a plurality of same peak hours.
3. The method for controlling energy storage discharge power according to claim 1, wherein after the step of obtaining the current actual power used by the user and the predicted average grid power supply power in a preset demand control period after entering a preset peak period, the method further comprises:
And calculating the reference discharge power of the energy storage device based on the remaining dischargeable amount of the energy storage device and the first remaining duration of the preset peak time.
4. A method of controlling stored energy discharge power according to claim 3, wherein the step of determining the discharge power of the energy storage device during the current demand control period comprises:
and if the current actual power consumption of the user is larger than the predicted average power grid power supply power, determining the discharge power of the energy storage equipment in the current demand control period as the reference discharge power.
5. The method of controlling energy storage discharge power of claim 1, wherein the step of determining the discharge power of the energy storage device during the current demand control period comprises:
if the current actual power of the user is not greater than the predicted average power grid power supply power, calculating a preset energy storage discharge power;
the preset energy storage discharge power is determined based on the residual dischargeable quantity and a second residual duration of a peak time period after a current demand control period;
judging whether the preset energy storage discharge power is larger than rated discharge power of the energy storage equipment or not;
And determining the discharge power of the energy storage device in the current demand control period.
6. The method of claim 5, wherein the step of determining the discharge power of the energy storage device during the current demand control period comprises:
if the preset energy storage discharge power is larger than the rated discharge power of the energy storage device, calculating the minimum discharge power of the energy storage device, which needs to be discharged in the current demand control period, based on the residual dischargeable amount of the energy storage device, the second residual duration, the rated discharge power and the demand control period;
and determining the discharge power of the energy storage device in the current demand control period as the minimum discharge power.
7. The method of claim 5, wherein the step of determining the discharge power of the energy storage device during the current demand control period comprises:
and if the preset energy storage discharge power is not greater than the rated discharge power of the energy storage equipment, determining that the discharge power of the energy storage equipment in the current demand control period is 0.
8. The method of claim 1, wherein before the step of determining whether the current actual power of the user is greater than the predicted average grid power, the method further comprises:
Determining whether the preset demand control period is in a preset peak period or not every other preset demand control period;
if not, after entering the next peak period, continuing to execute the step of judging whether the current actual power of the user is greater than the predicted average power supply power of the power grid.
9. A control device for energy storage discharge power, characterized in that the control device for energy storage discharge power realizes the steps of the control method for energy storage discharge power according to any one of claims 1 to 8.
10. An energy storage device, the energy storage device comprising: the control device for energy storage discharge power according to claim 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117895512A (en) * | 2024-03-15 | 2024-04-16 | 江苏辰宇电气有限公司 | Intelligent power distribution system and power distribution method |
| CN117895512B (en) * | 2024-03-15 | 2024-05-31 | 江苏辰宇电气有限公司 | Intelligent power distribution system and power distribution method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117895512A (en) * | 2024-03-15 | 2024-04-16 | 江苏辰宇电气有限公司 | Intelligent power distribution system and power distribution method |
| CN117895512B (en) * | 2024-03-15 | 2024-05-31 | 江苏辰宇电气有限公司 | Intelligent power distribution system and power distribution method |
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