CN110034570B - Control method and device of energy storage equipment and photovoltaic power station - Google Patents

Control method and device of energy storage equipment and photovoltaic power station Download PDF

Info

Publication number
CN110034570B
CN110034570B CN201910409220.2A CN201910409220A CN110034570B CN 110034570 B CN110034570 B CN 110034570B CN 201910409220 A CN201910409220 A CN 201910409220A CN 110034570 B CN110034570 B CN 110034570B
Authority
CN
China
Prior art keywords
optical power
acquisition time
photovoltaic
energy storage
equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910409220.2A
Other languages
Chinese (zh)
Other versions
CN110034570A (en
Inventor
刘兴
翁捷
闫永刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sungrow Power Supply Co Ltd
Original Assignee
Sungrow Power Supply Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sungrow Power Supply Co Ltd filed Critical Sungrow Power Supply Co Ltd
Priority to CN201910409220.2A priority Critical patent/CN110034570B/en
Publication of CN110034570A publication Critical patent/CN110034570A/en
Application granted granted Critical
Publication of CN110034570B publication Critical patent/CN110034570B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention provides a control method of energy storage equipment, which comprises the steps of obtaining a light power predicted value and a light power actual value of photovoltaic equipment at the current acquisition moment; when the photovoltaic equipment meets preset conditions at the current acquisition moment, comparing a predicted value of the optical power of the photovoltaic equipment at the current acquisition moment with an actual value of the optical power, wherein the preset conditions comprise that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition moment does not meet the standard; and sending a control instruction to the energy storage device according to the comparison result so as to control the energy storage device to emit or store target electric energy between the current acquisition time and the next acquisition time, wherein the target electric energy is the electric energy which needs to be emitted or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard. The invention also discloses a photovoltaic power station which comprises the energy storage equipment, the photovoltaic equipment and a controller used for executing the control method of the energy storage equipment.

Description

Control method and device of energy storage equipment and photovoltaic power station
Technical Field
The invention relates to the technical field of automatic control, in particular to a control method and device of energy storage equipment and a photovoltaic power station.
Background
In recent years, with the increasing amount of new photovoltaic installation machines, the photovoltaic power generation amount incorporated into a power grid is also increasing, but because the photovoltaic power generation amount is uncertain, the impact of the photovoltaic power generation on the stability of the power grid is also increasing.
In practical application, in order to reduce the impact of photovoltaic power generation on the stability of a power grid, a photovoltaic power station needs to predict the optical power of photovoltaic equipment, so that an electric power system can regulate and control the electric power according to the predicted optical power of the photovoltaic equipment.
The optical power prediction system depends on meteorological values in weather forecast, uncertainty of fluctuation of the values influences accuracy of optical power prediction, so that large errors exist between optical power output by a photovoltaic power station to a power grid and an optical power prediction value provided by the photovoltaic power station, and an electric power system cannot effectively regulate and control electric power according to the optical power prediction value provided by the photovoltaic power station, so that stability of operation of the power grid is influenced.
Disclosure of Invention
In view of the above, the invention provides a control method and device for energy storage equipment and a photovoltaic power station, which adjust actual optical power of the photovoltaic power station by controlling charging and discharging of the energy storage equipment, and reduce an error between the actual optical power and predicted optical power of the photovoltaic power station.
In order to achieve the above purpose, the invention provides the following specific technical scheme:
a method of controlling an energy storage device, comprising:
acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition moment;
comparing a predicted value of the optical power of the photovoltaic equipment with an actual value of the optical power at the current acquisition time when the photovoltaic equipment meets a preset condition at the current acquisition time, wherein the preset condition comprises that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
and sending a control instruction to the energy storage device according to the comparison result so as to control the energy storage device to emit or store target electric energy between the current acquisition time and the next acquisition time, wherein the target electric energy is the electric energy which needs to be emitted or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard.
Optionally, the preset condition further includes that the photovoltaic device fails at the current collection time.
Optionally, the sending a control instruction to the energy storage device according to the comparison result includes:
when the actual value of the optical power of the photovoltaic equipment at the current acquisition moment is smaller than the predicted value of the optical power, calculating the minimum actual value of the optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment both reach the standard;
calculating target electric energy which is required to be discharged by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the minimum optical power actual value;
and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
Optionally, the calculating the target amount of electric energy that the energy storage device needs to discharge between the current collecting time and the next collecting time for the photovoltaic power station to output the actual minimum optical power value includes:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and the optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Optionally, when the photovoltaic device fails at the current collecting time, the calculating makes the photovoltaic power station output the minimum actual optical power value, and the target amount of electric energy that the energy storage device needs to discharge between the current collecting time and the next collecting time includes:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating the product of the proportion value of the capacity without faults in the photovoltaic equipment to the total installed capacity and the estimated value of the optical power at the next acquisition time to obtain the estimated value of the effective optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and an effective optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain a target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Optionally, the sending a control instruction to the energy storage device according to the comparison result includes:
when the actual value of the optical power of the photovoltaic equipment at the current acquisition moment is larger than the predicted value of the optical power, calculating the actual value of the maximum optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment both reach the standard;
calculating target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the actual value of the maximum luminous power;
and sending a charging control instruction carrying the target electric energy to the energy storage equipment.
Optionally, the calculating the target amount of electric energy that the energy storage device needs to store between the current collection time and the next collection time for the photovoltaic power station to output the actual value of the maximum optical power includes:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on the actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating the estimated value of the optical power at the next acquisition time;
and calculating a difference value between the estimated value of the optical power of the photovoltaic equipment at the next acquisition time and the actual value of the maximum optical power, and calculating a product of the difference value, the time length between the current acquisition time and the next acquisition time and the charge-discharge efficiency of the energy storage equipment to obtain target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
A control apparatus for an energy storage device, comprising:
the acquisition unit is used for acquiring a predicted value and an actual value of the optical power of the photovoltaic equipment at the current acquisition moment;
the comparison unit is used for comparing a predicted value of the optical power of the photovoltaic equipment with an actual value of the optical power at the current acquisition time when the photovoltaic equipment meets a preset condition at the current acquisition time, wherein the preset condition comprises that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
and the control unit is used for sending a control instruction to the energy storage device according to the comparison result so as to control the energy storage device to emit or store target electric energy between the current acquisition time and the next acquisition time, wherein the target electric energy is the electric energy which needs to be emitted or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard.
Optionally, the preset condition further includes that the photovoltaic device fails at the current collection time.
Optionally, the control unit includes:
the discharge control subunit is used for calculating a minimum actual value of the optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard when the actual value of the optical power of the photovoltaic equipment at the current acquisition time is smaller than the predicted value of the optical power; calculating target electric energy which is required to be discharged by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the minimum optical power actual value; and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
Optionally, the discharge control subunit is specifically configured to:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and the optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Optionally, when the photovoltaic device fails at the current collecting time, the discharge control subunit is specifically configured to:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating the product of the proportion value of the capacity without faults in the photovoltaic equipment to the total installed capacity and the estimated value of the optical power at the next acquisition time to obtain the estimated value of the effective optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and an effective optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain a target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Optionally, the control unit includes:
the charging control subunit is used for calculating the maximum optical power actual value required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard when the optical power actual value of the photovoltaic equipment at the current acquisition time is larger than the optical power predicted value; calculating target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the actual value of the maximum luminous power; and sending a charging control instruction carrying the target electric energy to the energy storage equipment.
Optionally, the charging control subunit is specifically configured to:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on the actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating the estimated value of the optical power at the next acquisition time;
and calculating a difference value between the estimated value of the optical power of the photovoltaic equipment at the next acquisition time and the actual value of the maximum optical power, and calculating a product of the difference value, the time length between the current acquisition time and the next acquisition time and the charge-discharge efficiency of the energy storage equipment to obtain target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
A photovoltaic power plant comprising: the system comprises a controller, an energy storage device and a photovoltaic device;
the controller is used for acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition time, comparing the predicted value and the actual value of optical power of the photovoltaic equipment at the current acquisition time when the photovoltaic equipment meets preset conditions, and sending a control instruction to the energy storage equipment according to a comparison result, wherein the preset conditions comprise that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
and the energy storage device is used for discharging or storing target electric energy between the current acquisition time and the next acquisition time after receiving the control instruction, and the target electric energy is the electric energy which needs to be discharged or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard.
Optionally, the energy storage capacity of the energy storage device is a minimum energy storage capacity which satisfies the requirement that the energy storage device emits a maximum target electric energy and stores the maximum target electric energy, and simultaneously the state of charge of the energy storage device is within a preset range, where the maximum target electric energy emitted by the energy storage device is a maximum target electric energy which the energy storage device needs to emit in a preset statistical period in order to enable both the short-term prediction accuracy and the short-term qualification rate of the optical power of the photovoltaic power station to meet the standard, and the maximum target electric energy stored by the energy storage device is a maximum target electric energy which the energy storage device needs to store in a preset statistical period in order to enable both the short-term prediction accuracy and the short-term qualification rate of the optical power of the photovoltaic power station to meet the standard.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a control method of energy storage equipment, which is characterized in that when the photovoltaic equipment at the current moment meets a preset condition, if the short-term prediction accuracy or the short-term qualification rate of the optical power at the current acquisition moment does not meet the standard, the optical power predicted value and the optical power actual value of the photovoltaic equipment at the current moment are compared, and the energy storage equipment is controlled to emit or store target electric energy between the current acquisition moment and the next acquisition moment according to the comparison result so as to adjust the optical power actual value output to a power grid by a photovoltaic power station at the next acquisition moment, thereby effectively reducing the error between the optical power actual value and the optical power predicted value output to the power grid by the photovoltaic power station at the next acquisition moment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for controlling an energy storage device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another method for controlling an energy storage device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control apparatus of an energy storage device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment discloses a control method of an energy storage device, which is applied to a controller in a photovoltaic power station, and please refer to fig. 1, the method specifically includes the following steps:
s101: acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition moment;
the optical power prediction system of the photovoltaic power station can predict the optical power of each acquisition time in the next preset acquisition period according to the meteorological value in the weather forecast to obtain the predicted value of the optical power of each acquisition time, and taking the preset acquisition period as 1 day as an example, and taking every 15 minutes in 1 day as an acquisition time.
S102: comparing a predicted value of the optical power of the photovoltaic equipment with an actual value of the optical power at the current acquisition time when the photovoltaic equipment meets a preset condition at the current acquisition time, wherein the preset condition comprises that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
the preset condition indicates that the actual value of the optical power output by the photovoltaic equipment is inconsistent with the predicted value of the optical power, for example, the short-term forecasting accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach the standard.
The short-term forecasting accuracy of the photovoltaic power station reaches the standard when being more than or equal to 85%, and the short-term qualification rate reaches the standard when being more than or equal to 80%. The method for calculating the short-term prediction accuracy and the method for calculating the short-term qualification rate are as follows:
wherein, PMiFor the actual value of the optical power at the moment of i acquisition, PPiAnd the predicted value of the optical power at the moment i, Cap is the total installed capacity of the photovoltaic power station, and n is the number of samples.
S103: and sending a control instruction to the energy storage device according to the comparison result so as to control the energy storage device to emit or store target electric energy between the current acquisition time and the next acquisition time, wherein the target electric energy is the electric energy which needs to be emitted or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard.
It should be noted that when the predicted value of the optical power of the photovoltaic device at the current collection time is smaller than the actual value of the optical power, the energy storage device is required to discharge, the discharge is input into the power grid to make up for the deficiency of the power generation capacity of the photovoltaic device, so that the total output optical power of the photovoltaic power station is consistent with the predicted value of the optical power, when the predicted value of the optical power of the photovoltaic device at the current collection time is larger than the actual value of the optical power, the energy storage device is required to charge, and the surplus electric quantity output by the photovoltaic device is stored in the energy storage device, so that.
When the photovoltaic device fails at the current collection time, the actual value of the optical power of the photovoltaic device is necessarily smaller than the predicted value of the optical power, the photovoltaic device meets the preset condition, and the energy storage device needs to be controlled to discharge, on this basis, please refer to fig. 2, this embodiment discloses a control method of the energy storage device, which specifically includes the following steps:
s201: acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition moment;
s202: judging whether the photovoltaic equipment fails at the current acquisition moment;
specifically, the operating state of the photovoltaic device is monitored in real time.
If yes, go to step S203: sending a control instruction to the energy storage device to control the energy storage device to emit target electric energy between the current acquisition time and the next acquisition time;
specifically, calculating a minimum actual value of the optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment both reach the standard;
calculating target electric energy which is required to be discharged by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the minimum optical power actual value;
and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
When the energy storage device is used for discharging to improve the actual power of the photovoltaic power station, the actual power of the photovoltaic power station is the lowest actual power capable of reaching the standard line, and if the actual light power is detected to be insufficient at the k acquisition moment, the actual light power value P of the photovoltaic power station at the k +1 acquisition moment after energy is supplied by the energy storage deviceM,k+1Should be a feasible solution to the following goal planning:
min PM,k+1
here, PMiIs the actual value of the optical power at time i, PPiThe predicted value of the optical power at the moment i, Cap is the total installed capacity of the photovoltaic power station, n is the total number of samples, PP,k+1The predicted value of the optical power at the moment k +1 is obtained. Solving a feasible solution P by a target planning solutionM,k+1The energy storage device should adjust the actual power of the photovoltaic power station to P at the moment k +1M,k+1
Further, when the photovoltaic equipment fails at the current acquisition moment, acquiring an actual value of the optical power of the photovoltaic equipment at the historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating the product of the proportion value of the capacity without faults in the photovoltaic equipment to the total installed capacity and the estimated value of the optical power at the next acquisition time to obtain the estimated value of the effective optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and an effective optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain a target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station. When the photovoltaic equipment fails completely, the sum of the target electric energy emitted by the energy storage equipment and the output electric energy of the photovoltaic equipment which does not fail enables the photovoltaic power station to output the minimum optical power actual value.
Specifically, the effective optical power estimated value of the photovoltaic device at the k +1 moment is PF,k+1And the power output at the time k +2 to k + m is PF,k+jJ is 2.. m, assuming that the fault processing is completed at the time k + m. The target amount of electrical energy that the energy storage device should discharge during this period is:
eta is the charge-discharge efficiency of the lithium battery, and delta t is the time length from the k acquisition time to the k +1 acquisition time.
If not, executing S204: judging whether the short-term forecasting accuracy or the short-term qualification rate of the photovoltaic equipment light power at the current acquisition moment reaches a standard;
at the current collecting moment, if the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment does not reach the standard, executing S205: comparing the predicted value of the optical power of the photovoltaic equipment with the actual value of the optical power at the current acquisition moment;
s206: and sending a control instruction to the energy storage equipment according to the comparison result so as to control the energy storage equipment to discharge or store the target electric energy between the current acquisition time and the next acquisition time.
Specifically, when the actual value of the optical power of the photovoltaic equipment at the current collection time is smaller than the predicted value of the optical power, calculating the minimum actual value of the optical power required to be output by the photovoltaic power station, wherein the short-term prediction accuracy and the short-term qualification rate of the optical power at the next collection time both reach the standard;
calculating target electric energy which is required to be discharged by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the minimum optical power actual value;
and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
Wherein, the calculating the target electric energy which is required to be discharged by the energy storage device between the current acquisition time and the next acquisition time and is required to be output by the photovoltaic power station to the minimum actual luminous power value comprises the following steps:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and the optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Specifically, the estimated value of the optical power at the time k +1 is PF,k+1Target to be discharged by the energy storage deviceThe electric energy is as follows:
eta is the charge-discharge efficiency of the lithium battery, and delta t is the time length from the k acquisition time to the k +1 acquisition time.
When the actual value of the optical power of the photovoltaic equipment at the current acquisition moment is larger than the predicted value of the optical power, calculating the actual value of the maximum optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment both reach the standard;
calculating target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the actual value of the maximum luminous power;
and sending a charging control instruction carrying the target electric energy to the energy storage equipment.
When the energy supplied by the photovoltaic power station is excessive, the actual value of the optical power output by the photovoltaic equipment far exceeds the predicted value of the optical power, and the photovoltaic power station stores the excessive electric energy into the energy storage equipment so as to reduce the actual power output by the photovoltaic power station. In order to ensure that the photovoltaic power station incorporates as much electric energy into the power grid as possible, the actual power of the photovoltaic power station after charging the energy storage device should be the highest actual power reaching the standard line. Therefore, assuming that the actual light power is excessive at the k collection time, the actual light power value P of the photovoltaic power station at the k +1 collection time after the energy storage device is chargedM,k+1Should be a feasible solution to the following goal planning:
max PM,k+1
solving a feasible solution P by a target planning solutionM,k+1And adjusting the actual power of the photovoltaic power station to P at the k +1 acquisition moment after the energy storage equipment is chargedM,k+1
Wherein, the calculating the target electric energy which is required to be stored by the energy storage device between the current collection time and the next collection time and is output by the photovoltaic power station according to the actual value of the maximum luminous power comprises the following steps:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on the actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating the estimated value of the optical power at the next acquisition time;
and calculating a difference value between the estimated value of the optical power of the photovoltaic equipment at the next acquisition time and the actual value of the maximum optical power, and calculating a product of the difference value, the time length between the current acquisition time and the next acquisition time and the charge-discharge efficiency of the energy storage equipment to obtain target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Specifically, the estimated value of the optical power at the k +1 acquisition time is PF,k+1The energy stored in the energy storage device is E ═ η (P)F,k+1-PM,k+1) And delta t, eta is the charge-discharge efficiency of the lithium battery, and delta t is the time length from the k acquisition time to the k +1 acquisition time.
According to the control method of the energy storage device, when the photovoltaic device at the current moment meets the preset condition, if the short-term prediction accuracy or the short-term qualification rate of the optical power at the current collection moment does not meet the standard, the optical power predicted value and the optical power actual value of the photovoltaic device at the current moment are compared, the energy storage device is controlled to emit or store the target electric energy between the current collection moment and the next collection moment according to the comparison result, so that the optical power actual value output to the power grid by the photovoltaic power station at the next collection moment is adjusted, the error between the optical power actual value and the optical power predicted value output to the power grid by the photovoltaic power station at the next collection moment is effectively reduced, the power system can effectively regulate and control the electric power according to the optical power predicted value provided by the photovoltaic power station, and the operation stability of the power grid is.
Based on the control method of the energy storage device disclosed in the above embodiment, this embodiment correspondingly discloses a control apparatus of the energy storage device, which is arranged in a controller of a photovoltaic power station, please refer to fig. 3, and the apparatus includes:
the acquiring unit 301 is configured to acquire a predicted light power value and an actual light power value of the photovoltaic device at a current acquisition time;
a comparing unit 302, configured to compare a predicted value and an actual value of optical power of the photovoltaic device at a current acquisition time when the photovoltaic device meets a preset condition at the current acquisition time, where the preset condition includes that a short-term prediction accuracy or a short-term qualification rate of the optical power of the photovoltaic device at the current acquisition time does not meet a standard;
and the control unit 303 is configured to send a control instruction to the energy storage device according to the comparison result, so as to control the energy storage device to emit or store a target amount of electric energy between the current collection time and the next collection time, where the target amount of electric energy is an amount of electric energy that needs to be emitted or stored by the energy storage device when both the short-term prediction accuracy and the short-term qualification rate of the optical power at the next collection time meet the standard.
Optionally, the preset condition further includes that the photovoltaic device fails at the current collection time.
Optionally, the control unit 303 includes:
the discharge control subunit is used for calculating a minimum actual value of the optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard when the actual value of the optical power of the photovoltaic equipment at the current acquisition time is smaller than the predicted value of the optical power; calculating target electric energy which is required to be discharged by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the minimum optical power actual value; and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
Optionally, the discharge control subunit is specifically configured to:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and the optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Optionally, when the photovoltaic device fails at the current collecting time, the discharge control subunit is specifically configured to:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating the product of the proportion value of the capacity without faults in the photovoltaic equipment to the total installed capacity and the estimated value of the optical power at the next acquisition time to obtain the estimated value of the effective optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and an effective optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain a target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
Optionally, the control unit 303 includes:
the charging control subunit is used for calculating the maximum optical power actual value required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard when the optical power actual value of the photovoltaic equipment at the current acquisition time is larger than the optical power predicted value; calculating target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the actual value of the maximum luminous power; and sending a charging control instruction carrying the target electric energy to the energy storage equipment.
Optionally, the charging control subunit is specifically configured to:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on the actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating the estimated value of the optical power at the next acquisition time;
and calculating a difference value between the estimated value of the optical power of the photovoltaic equipment at the next acquisition time and the actual value of the maximum optical power, and calculating a product of the difference value, the time length between the current acquisition time and the next acquisition time and the charge-discharge efficiency of the energy storage equipment to obtain target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
According to the control device of the energy storage equipment, when the photovoltaic equipment at the current moment meets the preset condition, if the short-term prediction accuracy or the short-term qualification rate of the optical power at the current collection moment does not meet the standard, the optical power predicted value and the optical power actual value of the photovoltaic equipment at the current moment are compared, the energy storage equipment is controlled to emit or store the target electric energy between the current collection moment and the next collection moment according to the comparison result, so that the optical power actual value output to the power grid by the photovoltaic power station at the next collection moment is adjusted, the error between the optical power actual value and the optical power predicted value output to the power grid by the photovoltaic power station at the next collection moment is effectively reduced, the power system can effectively regulate and control the electric power according to the optical power predicted value provided by the photovoltaic power station, and the stability of the operation of the power.
This embodiment also discloses a photovoltaic power plant, includes: the system comprises a controller, an energy storage device and a photovoltaic device;
the controller is used for acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition time, comparing the predicted value and the actual value of optical power of the photovoltaic equipment at the current acquisition time when the photovoltaic equipment meets preset conditions, and sending a control instruction to the energy storage equipment according to a comparison result, wherein the preset conditions comprise that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
and the energy storage device is used for discharging or storing target electric energy between the current acquisition time and the next acquisition time after receiving the control instruction, and the target electric energy is the electric energy which needs to be discharged or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard.
Optionally, the energy storage capacity of the energy storage device is a minimum energy storage capacity which satisfies the requirement that the energy storage device emits a maximum target electric energy and stores the maximum target electric energy, and simultaneously the state of charge of the energy storage device is within a preset range, where the maximum target electric energy emitted by the energy storage device is a maximum target electric energy which the energy storage device needs to emit in a preset statistical period in order to enable both the short-term prediction accuracy and the short-term qualification rate of the optical power of the photovoltaic power station to meet the standard, and the maximum target electric energy stored by the energy storage device is a maximum target electric energy which the energy storage device needs to store in a preset statistical period in order to enable both the short-term prediction accuracy and the short-term qualification rate of the optical power of the photovoltaic power station to meet the standard.
Specifically, the number of times of charging and discharging the energy storage device in a day is related to the geographical location of the power station, the climate environment, and the quality of the device in the power station. Therefore, the charging and discharging times and the charging and discharging energy of the energy storage equipment can be obtained through simulation calculation according to the data of the historical statistical period of the power station, and then a reasonable capacity value of the energy storage equipment is obtained, and the specific steps are as follows:
step 1: according to the historical daily actual optical power data and optical power of the photovoltaic power stationThe method comprises the steps of calculating information such as rate prediction data, meteorological data, fault information and power station equipment, and counting the number of days of light power loss caused by equipment fault of the photovoltaic power station in a preset counting period in the past, such as one year or two years in the past, wherein the number of days is D1D, the number of days after the number of days of failure is removed and the number of days when the historical optical power actual value of the photovoltaic power station is smaller than the optical power predicted value2D, the number of days after the number of days of failure is removed, wherein the actual value of the historical optical power of the photovoltaic power station is larger than the predicted value of the optical power3
Step 2: calculating the electric energy E which is required to be discharged by the energy storage equipment every day when the faults occur according to the information of the number of the faults of the photovoltaic power station equipment, the capacity of the equipment, the fault occurrence time, the fault elimination time and the liker,i,i=1,…D1
Step 3: the actual value of the historical optical power of the photovoltaic power station is smaller than the predicted value of the optical power, so that the optical power is insufficient, and the electric energy E which is required to be discharged by the energy storage equipment every day is calculatedr,j,j=1,…,D2
Step 4: the actual value of the historical optical power of the photovoltaic power station is larger than the predicted value of the optical power, so that the optical power is excessive, and the electric energy which is required to be stored by the energy storage equipment every day is calculated to be Ec,k,k=1,…,D3
Step 5: under the condition of ensuring the short-term forecasting accuracy of the photovoltaic equipment light power and short-term qualification rate not meeting the standard by using the energy storage technology, and considering that the state of charge (SOC) of the energy storage equipment needs to be kept in a certain range, the capacity E of the energy storage equipmentbThe following target plan should be met:
minEb
and solving the target planning problem to obtain a reasonable energy storage equipment capacity value and a minimum energy storage capacity value.
The photovoltaic power station disclosed in this embodiment calculates the electric energy discharged by the energy storage device when the actual value of the optical power is smaller than the predicted value of the optical power in the preset statistical period, and the electric energy stored by the energy storage device when the actual value of the optical power is larger than the predicted value of the optical power, calculates the minimum energy storage capacity for enabling the state of charge of the energy storage device to be within the preset range according to the electric energy discharged by the energy storage device and the electric energy stored by the energy storage device in the preset statistical period, enables the photovoltaic power station to reasonably set the energy storage device according to the minimum energy storage capacity, controls the energy storage device to discharge corresponding electric energy when the actual value of the optical power is smaller than the predicted value of the optical power, and controls the energy storage device to store corresponding electric energy when the actual value of the optical power is larger than the predicted value of the optical power, wherein the minimum energy storage capacity of the energy storage device not only meets, and energy storage cost can be reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A method of controlling an energy storage device, comprising:
acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition moment;
comparing a predicted value of the optical power of the photovoltaic equipment with an actual value of the optical power at the current acquisition time when the photovoltaic equipment meets a preset condition at the current acquisition time, wherein the preset condition comprises that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
sending a control instruction to the energy storage device according to the comparison result so as to control the energy storage device to emit or store target electric energy between the current acquisition time and the next acquisition time, wherein the target electric energy is the electric energy which needs to be emitted or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard;
specifically, when the actual value of the optical power of the photovoltaic equipment at the current collection time is smaller than the predicted value of the optical power, calculating the minimum actual value of the optical power required to be output by the photovoltaic power station, wherein the short-term prediction accuracy and the short-term qualification rate of the optical power at the next collection time both reach the standard;
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating a difference value between the minimum optical power actual value and an optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be emitted by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station;
and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
2. The method according to claim 1, wherein the preset conditions further comprise that the photovoltaic device fails at the current collection time.
3. The method of claim 1, wherein said calculating a target amount of electrical energy that the energy storage device needs to discharge between a current collection time and a next collection time for the photovoltaic power plant to output the actual value of minimum optical power when the photovoltaic device fails at the current collection time comprises:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating the product of the proportion value of the capacity without faults in the photovoltaic equipment to the total installed capacity and the estimated value of the optical power at the next acquisition time to obtain the estimated value of the effective optical power of the photovoltaic equipment at the next acquisition time;
and calculating a difference value between the minimum optical power actual value and an effective optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain a target electric energy which is required to be released by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
4. The method of claim 1, wherein sending a control command to the energy storage device based on the comparison comprises:
when the actual value of the optical power of the photovoltaic equipment at the current acquisition moment is larger than the predicted value of the optical power, calculating the actual value of the maximum optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment both reach the standard;
calculating target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and enables the photovoltaic power station to output the actual value of the maximum luminous power;
and sending a charging control instruction carrying the target electric energy to the energy storage equipment.
5. The method of claim 4, wherein said calculating a target amount of electrical energy required by said energy storage device to store between a current collection time and a next collection time for said photovoltaic power plant to output said actual value of maximum optical power comprises:
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on the actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating the estimated value of the optical power at the next acquisition time;
and calculating a difference value between the estimated value of the optical power of the photovoltaic equipment at the next acquisition time and the actual value of the maximum optical power, and calculating a product of the difference value, the time length between the current acquisition time and the next acquisition time and the charge-discharge efficiency of the energy storage equipment to obtain target electric energy which is required to be stored by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station.
6. A control apparatus for an energy storage device, comprising:
the acquisition unit is used for acquiring a predicted value and an actual value of the optical power of the photovoltaic equipment at the current acquisition moment;
the comparison unit is used for comparing a predicted value of the optical power of the photovoltaic equipment with an actual value of the optical power at the current acquisition time when the photovoltaic equipment meets a preset condition at the current acquisition time, wherein the preset condition comprises that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
the control unit is used for sending a control instruction to the energy storage device according to the comparison result so as to control the energy storage device to emit or store target electric energy between the current acquisition time and the next acquisition time, wherein the target electric energy is the electric energy which needs to be emitted or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard;
when the actual value of the optical power of the photovoltaic device at the current collecting time is smaller than the predicted value of the optical power, the control unit is specifically configured to:
calculating a minimum optical power actual value which is required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment reach the standard;
acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment;
carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time;
calculating a difference value between the minimum optical power actual value and an optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be emitted by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station;
and sending a discharge control instruction carrying the target electric energy to the energy storage equipment.
7. A photovoltaic power plant, comprising: the system comprises a controller, an energy storage device and a photovoltaic device;
the controller is used for acquiring a predicted value and an actual value of optical power of the photovoltaic equipment at the current acquisition time, comparing the predicted value and the actual value of optical power of the photovoltaic equipment at the current acquisition time when the photovoltaic equipment meets preset conditions, and sending a control instruction to the energy storage equipment according to a comparison result, wherein the preset conditions comprise that the short-term prediction accuracy or the short-term qualification rate of the optical power of the photovoltaic equipment at the current acquisition time does not reach a standard;
when the actual value of the optical power of the photovoltaic equipment at the current acquisition moment is smaller than the predicted value of the optical power, the controller is used for calculating the minimum actual value of the optical power required to be output by the photovoltaic power station when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition moment both reach the standard; acquiring an actual value of the optical power of the photovoltaic equipment at a historical acquisition moment; carrying out quadratic curve fitting on actual values of the optical power of the photovoltaic equipment at the historical acquisition time and the current acquisition time, and calculating an estimated value of the optical power of the photovoltaic equipment at the next acquisition time; calculating a difference value between the minimum optical power actual value and an optical power estimated value of the photovoltaic equipment at the next acquisition time, calculating a ratio of the difference value to the charge-discharge efficiency of the energy storage equipment, and calculating a product of a time length between the current acquisition time and the next acquisition time and the ratio to obtain target electric energy which is required to be emitted by the energy storage equipment between the current acquisition time and the next acquisition time and is output by the photovoltaic power station; sending a discharge control instruction carrying the target electric energy to the energy storage equipment;
and the energy storage device is used for discharging or storing target electric energy between the current acquisition time and the next acquisition time after receiving the control instruction, and the target electric energy is the electric energy which needs to be discharged or stored by the energy storage device when the short-term prediction accuracy and the short-term qualification rate of the optical power at the next acquisition time both reach the standard.
8. The photovoltaic power plant of claim 7 wherein the energy storage device has an energy storage capacity that is a minimum energy storage capacity that satisfies a requirement that the energy storage device be capable of discharging a maximum target amount of electrical energy and storing the maximum target amount of electrical energy while having a state of charge of the energy storage device within a predetermined range, wherein the maximum target amount of electrical energy discharged by the energy storage device is the maximum target amount of electrical energy that the energy storage device needs to discharge in a predetermined statistical period in order to meet a criterion for both short-term prediction accuracy and short-term qualification of optical power of the photovoltaic power plant, and the maximum target amount of electrical energy stored by the energy storage device is the maximum target amount of electrical energy that the energy storage device needs to store in the predetermined statistical period in order for both the short-term prediction accuracy and the short-term qualification of optical power of the photovoltaic power plant to meet the criterion.
CN201910409220.2A 2019-05-16 2019-05-16 Control method and device of energy storage equipment and photovoltaic power station Active CN110034570B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910409220.2A CN110034570B (en) 2019-05-16 2019-05-16 Control method and device of energy storage equipment and photovoltaic power station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910409220.2A CN110034570B (en) 2019-05-16 2019-05-16 Control method and device of energy storage equipment and photovoltaic power station

Publications (2)

Publication Number Publication Date
CN110034570A CN110034570A (en) 2019-07-19
CN110034570B true CN110034570B (en) 2021-06-11

Family

ID=67242447

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910409220.2A Active CN110034570B (en) 2019-05-16 2019-05-16 Control method and device of energy storage equipment and photovoltaic power station

Country Status (1)

Country Link
CN (1) CN110034570B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203299873U (en) * 2013-06-25 2013-11-20 重庆市武隆县供电有限责任公司 Photovoltaic power generation short-period output power forecasting system based on energy storage technology
CN105552970A (en) * 2016-02-25 2016-05-04 华北电力科学研究院有限责任公司 Method and apparatus for improving accuracy of predicting power of wind power station
CN107093911A (en) * 2017-05-10 2017-08-25 成都鼎智汇科技有限公司 A kind of intelligent photovoltaic energy-storage system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10554048B2 (en) * 2015-05-18 2020-02-04 University Of North Carolina At Charlotte Battery energy storage system controller systems and methods
CN106451511B (en) * 2016-11-17 2019-03-19 新智能源系统控制有限责任公司 A kind of energy storage optimal control method
CN109617138A (en) * 2019-01-16 2019-04-12 哈尔滨工业大学(深圳) A kind of independent energy management method for micro-grid considering stochastic prediction error

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203299873U (en) * 2013-06-25 2013-11-20 重庆市武隆县供电有限责任公司 Photovoltaic power generation short-period output power forecasting system based on energy storage technology
CN105552970A (en) * 2016-02-25 2016-05-04 华北电力科学研究院有限责任公司 Method and apparatus for improving accuracy of predicting power of wind power station
CN107093911A (en) * 2017-05-10 2017-08-25 成都鼎智汇科技有限公司 A kind of intelligent photovoltaic energy-storage system

Also Published As

Publication number Publication date
CN110034570A (en) 2019-07-19

Similar Documents

Publication Publication Date Title
US9847648B2 (en) Hybrid electric generating power plant that uses a combination of real-time generation facilities and energy storage system
US9692234B2 (en) Systems and methods for distributing power using photovoltaic resources and a shifting battery system
US9020800B2 (en) Method and apparatus for controlling energy services based on market data
US20160003918A1 (en) Monitoring apparatus, control apparatus, and control system
JP3740099B2 (en) Power network management system and power network management method
JP2009284586A (en) Power system and its control method
CN107039975B (en) Energy management method for distributed energy system
CN106253315B (en) A kind of energy accumulation capacity configuration considering electric automobile charging station schedulability
JP2015165732A (en) Storage battery control device, power supply system, storage battery control method and program
Chen et al. Energy storage sizing for dispatchability of wind farm
JP5617033B2 (en) Supply / demand planning control system for low voltage system and supply / demand planning control method for low voltage system
KR101716259B1 (en) High capacity battery system for frequency regulation of electrical power system, method for managing thereof
JP2016116401A (en) Power load leveling device
CN110034570B (en) Control method and device of energy storage equipment and photovoltaic power station
US20190027936A1 (en) Power supply control method and system
Wee et al. Design of a renewable—hybrid energy storage power scheme for short-term power dispatch
Yao et al. Determination of a dispatch strategy to maximize income for a wind turbine-BESS power station
JP6630038B2 (en) Supply and demand control device, power supply system and supply and demand control method
WO2020105019A2 (en) A method and system for ageing-aware management of the charging and discharging of li-ions batteries
Sardi et al. A comprehensive community energy storage planning strategy based on a cost-benefit analysis
CN108767883B (en) Response processing method of demand side
WO2015185890A1 (en) Adaptive battery management system
JP6198894B2 (en) Wind power plant operation control device, operation control method, and wind power generation system
Nguyen-Hong et al. Optimal scheduling of an isolated wind-diesel-battery system considering forecast error and frequency response
KR20190140296A (en) Operation system and method for virtual power plant using risk analysis

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant