CN115411755A - Electric energy storage combination management method and system - Google Patents
Electric energy storage combination management method and system Download PDFInfo
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- CN115411755A CN115411755A CN202211037027.9A CN202211037027A CN115411755A CN 115411755 A CN115411755 A CN 115411755A CN 202211037027 A CN202211037027 A CN 202211037027A CN 115411755 A CN115411755 A CN 115411755A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- H02J15/00—Systems for storing electric 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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Abstract
The invention discloses an electric energy storage combination management method and system, which are used for monitoring the current power supply time period or power supply rate, judging the power supply time period at the current moment and sending the power supply time period to energy storage management equipment and energy storage analysis equipment; according to the current specific power supply time period, determining an energy storage device monitoring strategy and sending the strategy to energy storage monitoring equipment to monitor the energy storage device and the energy storage environment, acquiring internal parameters and environmental parameters of the energy storage device, sending the parameters and the generated energy of the current power generation equipment to energy storage analysis equipment to calculate comprehensive charge and discharge indexes of the energy storage devices of different types respectively, and sequencing the charge and discharge priorities of a plurality of energy storage devices in each type according to the result; the control strategy of the energy storage equipment of each type is determined, and the energy storage equipment of different types is controlled to be charged and discharged simultaneously, so that the charging of the energy storage power plant in the valley power period is ensured, and the power supply and continuous stable operation of the energy storage power plant are ensured.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to an electric energy storage combination management method and system.
Background
The electric power energy storage hybrid system is a power generation system with an energy storage device. The power generation system therein cannot continuously and stably output electric energy due to various conditions. Therefore, the energy storage device with a certain capacity is configured in the system to play the roles of smoothing power fluctuation, maintaining power generation/load dynamic balance and keeping voltage/frequency stable, so that the power generation system can run safely, economically, efficiently and high-quality. In terms of the technical performance of the energy storage system, the larger the capacity configuration is, the better the smoothing effect on the power fluctuation of the power generation system is, but the investment cost of the system is increased at the same time, and the economic requirement cannot be well met. Therefore, for an energy storage system with a certain capacity, how to improve the technical performance of the energy storage system in a wind power system through the optimization control of the energy storage system becomes a problem to be urgently solved at present.
At present, with the gradual development of new energy power generation and micro-grid technology and the continuous expansion of power supply in various regions and time periods, new problems are brought to the stable and safe operation of a power grid. The technology of lead-acid batteries with large capacity, super capacitor energy storage and the like is adopted, so that the problem of shortage of power supply and demand can be effectively solved, the quality of electric energy is improved, and the operation safety of a power grid is improved.
Disclosure of Invention
In view of the above, the present invention has been made to provide a solution that overcomes or at least partially solves the above mentioned problems. Therefore, in one aspect of the present invention, an electrical energy storage combination management method is provided, and the method specifically includes:
step 1, monitoring the current power supply time period or power supply rate, judging the power supply time period at the current moment, and sending the result to an energy storage management device and an energy storage analysis device;
step 2, determining an energy storage device monitoring strategy according to the current specific power supply time period, and sending the monitoring strategy to the energy storage monitoring device;
step 3, monitoring the energy storage equipment and the energy storage environment according to the received monitoring strategy to obtain internal parameters and environmental parameters of the energy storage equipment, and then sending the parameters and the generated energy of the current power generation equipment to energy storage analysis equipment;
step 4, respectively calculating comprehensive charge and discharge indexes of the different types of the power storage equipment according to the current power supply time period and the received parameters, and sequencing charge and discharge priorities of the plurality of power storage equipment in each type according to results;
and 5, determining control strategies of the energy storage devices of various types according to the energy storage devices of various types and the generated energy and charging and discharging priority sequence of the current power generation device, and controlling the energy storage devices of different types to be charged and discharged simultaneously according to specific control strategies.
Preferably, the step 2 comprises: if the current power supply time interval is the power supply peak time interval, transmitting output power preparation information of the energy storage equipment to the energy storage monitoring equipment; if the current power supply time interval is a power supply valley time interval, transmitting power preparation information input by the energy storage equipment to the energy storage monitoring equipment; and if the current power supply time interval is a common time interval, the energy storage monitoring equipment is not informed.
Preferably, the step 3 comprises: when current power generation amount and power preparation information output by energy storage equipment are received, monitoring internal parameters of the energy storage equipment to obtain two parameters of current energy storage and standard discharge speed; and monitoring the energy storage environment to obtain the environmental parameters, and sending the obtained parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
Preferably, the step 4 comprises: obtaining a service life value and an actual discharging speed of each device in a plurality of devices of the battery energy storage device type according to the environmental parameters; obtaining the discharge speed deviation of each device according to the actual discharge speed and the standard discharge speed; and obtaining a corresponding comprehensive discharge index according to the current energy storage, discharge speed deviation and service life value of each device, and setting a discharge priority order according to the comprehensive discharge index from large to small.
Preferably, the step 5 comprises: the current power supply time interval is a power supply peak time interval, and different types of energy storage equipment simultaneously start to output power according to respective discharging priority orders until power supply requirements are met; the current power supply time interval is a power supply valley time interval, and energy storage devices of different types simultaneously start to input power according to respective charging priority sequences until all the energy storage devices are fully charged or the residual generated energy meets the power supply requirement.
The invention also provides an electric energy storage combination management system, which specifically comprises:
the power supply monitoring equipment is used for monitoring the current power supply time period or power supply rate, judging the current power supply time period and sending the result to the energy storage management equipment and the energy storage analysis equipment; the energy storage management equipment is used for determining an energy storage equipment monitoring strategy according to the current specific power supply time period and sending the monitoring strategy to the energy storage monitoring equipment; the energy storage monitoring equipment is used for monitoring the energy storage equipment and the energy storage environment according to the received monitoring strategy, acquiring internal parameters and environmental parameters of the energy storage equipment, and then sending the parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment; the energy storage analysis equipment is used for respectively calculating comprehensive charge and discharge indexes of the different types of the electricity storage equipment according to the current power supply time period and the received parameters, and sequencing charge and discharge priorities of the plurality of electricity storage equipment in each type according to results; and the energy storage control equipment is used for determining control strategies of the energy storage equipment of each type according to the energy storage equipment of each type and the generated energy and charging and discharging priority sequence of the current power generation equipment respectively, and controlling the energy storage equipment of different types to be charged and discharged simultaneously according to specific control strategies.
Preferably, the energy storage management device is further configured to: if the current power supply time interval is the power supply peak time interval, transmitting output power preparation information of the energy storage equipment to the energy storage monitoring equipment; if the current power supply time interval is a power supply valley time interval, transmitting power preparation information input by the energy storage equipment to the energy storage monitoring equipment; and if the current power supply time interval is a common time interval, the energy storage monitoring equipment is not informed.
Preferably, the energy storage monitoring device is further configured to: when current power generation amount and power preparation information output by energy storage equipment are received, monitoring internal parameters of the energy storage equipment to obtain two parameters of current energy storage and standard discharge speed; and monitoring the energy storage environment to obtain the environmental parameters, and sending the obtained parameters and the generated energy of the current power generation equipment to energy storage analysis equipment.
Preferably, the stored energy analysis device is further configured to: obtaining a life value and an actual discharging speed of each device in a plurality of devices of the battery energy storage device type according to the environmental parameters; obtaining the discharge speed deviation of each device according to the actual discharge speed and the standard discharge speed; and obtaining a corresponding comprehensive discharge index according to the current energy storage capacity, the discharge speed deviation and the service life value of each device, and setting a discharge priority sequence from large to small according to the comprehensive discharge index.
Preferably, the energy storage control device is further configured to: the current power supply time period is a power supply peak time period, and the energy storage devices of different types simultaneously start to output power according to respective discharging priority orders until the power supply requirement is met; the current power supply time interval is a power supply valley time interval, and energy storage devices of different types simultaneously start to input power according to respective charging priority sequences until all the energy storage devices are fully charged or the residual generated energy meets the power supply requirement.
Due to the adoption of the technical scheme, the invention can achieve the following beneficial effects: utilize different grade type energy storage equipment to use in the power plant in combination, exert advantage separately, realized the great fluctuation of the electric power needs of different power supply periods, guarantee the charging of energy storage power plant in the millet electricity period, ensured the power supply and the continuous steady operation of energy storage power plant.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a method of managing an electrical energy storage portfolio of the present invention;
fig. 2 is a schematic diagram of the electrical energy storage combination management system of the present invention.
These drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
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.
Based on the above technical problem, the present invention provides an electrical energy storage combination management method, as shown in fig. 1, the method specifically includes:
step 1, monitoring the current power supply time period or power supply rate, judging the power supply time period at the current moment, and sending the result to energy storage management equipment and energy storage analysis equipment.
The power supply time period comprises a power supply peak time period, a common time period or a power supply valley time period.
The power supply peak time is that a large amount of power needs to be output in a short time, namely the output power is higher than a normal range, and power generation is carried out simultaneously; the common time interval is that the output power is in a normal range within preset time and power generation is carried out simultaneously; the power supply valley period is that a small amount of power is output in a preset time, namely the output power is lower than a normal range, and power generation is carried out simultaneously.
The current power supply time is a time interval of each power supply time which is preset or determined according to a common rule, namely, the time of a day (24 hours) is divided into one or more power supply high-end time periods, common time periods and power supply low-valley time periods. Such as a power supply valley period at 23 hours-6 hours, a normal period at 7 hours-10 hours, a power supply peak period at 18 hours-22 hours, and so on.
The power supply rate is the acquired electric power output by the power generation equipment in a unit time period, and the unit time period is a preset time length, such as 2 seconds, 5 seconds or 10 seconds.
The step 1 specifically comprises the following steps: due to the difference between the position of the power plant and the power supply area, some power plants have a certain regular or artificially-specified time interval of power supply time, but some power plants have uncertain power supply amount changes and may have a situation of rapid change, so that the current power supply time is used as a parameter for judging the power supply time interval in the power supply regular or specified power plants, and the power supply rate is used as a parameter for judging the power supply time in the power plants without the regular or specified power plants.
When the current power supply time is used as a parameter, the current time and a plurality of preset time intervals are obtained, the preset time interval is judged, the current power supply time is determined according to the preset time zone, and the determination result is sent to the energy storage management equipment and the energy storage analysis equipment.
For example, the predetermined time intervals are 23-6 hours, 7-10 hours, 11-13 hours, 14-17 hours, and 18-22 hours, which are power supply valley periods, common times, and power supply peak periods.
When the current time obtained for multiple times is T1=9, T2=3, and T3=20, it is determined that T1 is in the ordinary time period, T2 is in the power supply valley time period, and T3 is in the power supply peak time period.
When the power supply rate is used as a parameter, timing is carried out according to a preset unit time period, all power supply amount in the unit time period is obtained in real time, whether the power supply amount is within a normal range or not is judged, and if the power supply amount is within the normal range, the current time is in a common time period; if the power supply amount is higher than the normal range, the current moment is in a power supply peak period; and if the power supply amount is lower than the normal range, the current moment is in the power supply valley period, and the determination result is sent to the energy storage management equipment and the energy storage analysis equipment.
For example, in a 5-second timekeeping time, the total power supply amounts of the power generation equipment at three times of Q1, Q2 and Q3 in a unit time period are 7000W, 1000W and 20000W respectively, and the normal range threshold is 3000W-10000W, it is determined that Q1 is in a normal time period, Q2 is in a power supply valley time period, and Q3 is in a power supply peak time period.
And 2, determining an energy storage device monitoring strategy according to the current specific power supply time period, and sending the monitoring strategy to the energy storage monitoring device.
The monitoring policy is input power preparation information or output power preparation information of the energy storage device.
The step 2 specifically comprises the following steps: if the current power supply time interval is a power supply peak time interval, namely the current power generation amount possibly cannot meet the power supply requirement, sending output power preparation information of the energy storage equipment to the energy storage monitoring equipment; if the current power supply time interval is a power supply valley time interval, namely the current power generation amount possibly exceeds the required power supply amount, transmitting power preparation information input by the energy storage equipment to the energy storage monitoring equipment; and if the current power supply time interval is a common time interval, namely the current generated energy meets the power supply requirement, the energy storage monitoring equipment is not informed.
And 3, monitoring the energy storage equipment and the energy storage environment according to the received monitoring strategy to obtain internal parameters and environmental parameters of the energy storage equipment, and then sending the parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
The energy storage device includes a battery device and a supercapacitor.
The internal parameters of the energy storage device mainly comprise the current energy storage capacity, the standard charging speed and the standard discharging speed.
The step 3 specifically comprises the following steps: when the current generated energy and the electric power preparation information output by the energy storage equipment are received, monitoring internal parameters of the energy storage equipment to obtain two parameters of current stored energy and standard discharge speed, monitoring the energy storage environment to obtain the environmental parameters, and sending the obtained parameters and the current generated energy of the power generation equipment to the energy storage analysis equipment.
When energy storage preparation information of the energy storage equipment is received, monitoring internal parameters of the energy storage equipment to obtain two parameters of current energy storage and standard charging speed, and sending the obtained parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
If no information is received, the energy storage device and the environment are not monitored.
And 4, respectively calculating comprehensive charge and discharge indexes of the electricity storage equipment of different types according to the current power supply time period and the received parameters, and sequencing charge and discharge priorities of the electricity storage equipment in each type according to results.
The comprehensive charge and discharge indexes comprise comprehensive charge indexes and comprehensive discharge indexes.
The comprehensive charging index is weighted values of three parameters of the current stored energy, the charging speed deviation and the service life value of the energy storage device, and is a numerical value between 1 and 100.
The comprehensive discharge index is weighted values of three parameters of the current stored energy, the discharge speed deviation and the service life of the energy storage device, and is a numerical value between 1 and 100.
The charging speed deviation is an absolute value of a difference value between an actual charging speed and a standard charging speed of the energy storage equipment; the discharge speed deviation is an absolute value of a difference value between the actual discharge speed of the energy storage equipment and the standard discharge speed; the actual charging rate, the actual discharging rate, and the life value are all affected by environmental parameters.
Specifically, when the current power supply period is a power supply peak period, the received parameters include the current stored energy in the energy storage device, the standard discharge rate, and the environmental parameters.
Because the energy storage devices of different types can be combined for use, respective advantages can be fully exerted, the energy storage devices of different types need to be simultaneously subjected to charge and discharge control, in addition, the charge and discharge priority ranking is carried out inside the energy storage devices of different types, and the energy storage efficiency can also be improved.
Aiming at a plurality of devices of the battery energy storage device types, firstly, the service life value and the actual discharge speed of each device are obtained according to environmental parameters, then, the discharge speed deviation of each device is obtained according to the actual discharge speed and the standard discharge speed, in addition, the respective comprehensive discharge index is obtained according to the current energy storage amount, the discharge speed deviation and the service life value of each battery energy storage device, and finally, the discharge priority order is set according to the comprehensive discharge index from large to small.
And calculating the comprehensive discharge index of each super capacitor energy storage device by aiming at a plurality of devices of the super capacitor energy storage device types in the same way as the battery energy storage device, and then setting a discharge priority order according to the comprehensive discharge index from large to small.
The current power supply time interval is a power supply valley time interval, and the received multiple parameters comprise current stored energy in the energy storage device, a standard charging speed and environmental parameters.
Aiming at a plurality of devices of the type of the battery energy storage device, firstly, the service life value and the actual charging speed of each device are obtained according to the environmental parameters, then, the charging speed deviation of each device is obtained according to the actual charging speed and the standard charging speed, in addition, respective comprehensive charging indexes are obtained according to the current energy storage, the charging speed deviation and the service life value of each battery energy storage device, and finally, the charging priority order is set from large to small according to the comprehensive charging indexes.
And calculating the comprehensive charging index of each super capacitor energy storage device by aiming at a plurality of devices of the super capacitor energy storage device types in the same way as the battery energy storage device, and then setting the charging priority order according to the comprehensive charging index from large to small.
And 5, determining control strategies of the energy storage devices of various types according to the energy storage devices of various types and the generated energy and charging and discharging priority sequence of the current power generation device, and controlling the energy storage devices of different types to be charged and discharged simultaneously according to specific control strategies.
The method comprises the following specific steps: the current power supply time interval is the power supply peak time interval, and different types of energy storage equipment simultaneously start to output power according to the respective discharging priority order until the power supply requirement is met.
The sum of the electric storage quantity of all the electric storage equipment which meets the power supply requirement, specifically the output power and the generated energy of the current power generation equipment is matched with the current required power supply quantity.
For example, the battery energy storage device group and the super capacitor group start the devices with the first priority, namely the battery with the first priority and the super capacitor with the first priority, and then start the battery with the second priority and the super capacitor with the second priority according to the respective discharging priorities, and stop starting the next group of batteries and super capacitors until the sum of the energy storage amount and the energy generation amount of all the started batteries and super capacitors meets the current required power supply amount.
The current power supply time interval is a power supply valley time interval, and energy storage devices of different types simultaneously start to input power according to respective charging priority sequences until all the energy storage devices are fully charged or the residual generated energy meets the power supply requirement.
The residual generated energy meets the power supply quantity requirement, and specifically, after the power generation equipment is fully filled with the current energy storage equipment, the residual generated energy is matched with the current required power supply quantity, and charging cannot be carried out temporarily.
For example, according to the respective charging priorities, the battery energy storage device group and the super capacitor group first charge the devices with the first priority, that is, the first priority battery and the super capacitor with the first priority, and then charge the second priority battery and the super capacitor with the second priority until the electric storage capacity of all the batteries and the super capacitors is 100%, or the remaining electric generation capacity after charging can only meet the current power supply requirement, then stop charging the next group of batteries and super capacitors.
In addition, if the current electric quantity stored by part of the energy storage devices is not 100%, the difference value between the current generated electric quantity and the required power supply quantity is monitored in real time, and if the difference value meets the required charging quantity of all the currently-unfilled energy storage devices, the unfilled energy storage devices are charged simultaneously. Therefore, the charging of the energy storage equipment can be ensured, and the problem of insufficient power supply can be avoided.
The invention further provides an electrical energy storage combination management system, as shown in fig. 2, the system specifically includes:
the system comprises power supply monitoring equipment, energy storage management equipment, energy storage monitoring equipment, energy storage analysis equipment and energy storage control equipment.
And the power supply monitoring equipment is used for monitoring the current power supply time period or power supply rate, judging the current power supply time period and sending the result to the energy storage management equipment and the energy storage analysis equipment.
The power supply period comprises a power supply peak period, a common period or a power supply valley period.
The power supply peak time is that a large amount of power needs to be output in a short time, namely the output power is higher than a normal range, and power generation is carried out simultaneously; the common time interval is that the output power is in a normal range within preset time and power generation is carried out at the same time; the power supply valley period is that a small amount of power is output in a preset time, namely the output power is lower than a normal range, and power generation is carried out simultaneously.
The current power supply time is a preset or determined time interval of each power supply time according to a general rule, namely, the time of a day (24 hours) is divided into one or more power supply high-end periods, common periods and power supply low-valley periods. Such as a power supply valley period at 23 hours-6 hours, a normal period at 7 hours-10 hours, a power supply peak period at 18 hours-22 hours, and so on.
The power supply rate is the acquired electric power output by the power generation equipment in a unit time period, and the unit time period is a preset time length, such as 2 seconds, 5 seconds or 10 seconds.
The power supply monitoring device is specifically configured to: due to the difference between the position of the power plant and the power supply area, some power plants have a certain regular or artificially-specified time interval of power supply time, but some power plants have uncertain power supply amount changes and may have a situation of rapid change, so that the current power supply time is used as a parameter for judging the power supply time interval in the power supply regular or specified power plants, and the power supply rate is used as a parameter for judging the power supply time in the power plants without the regular or specified power plants.
When the power supply monitoring equipment uses the current power supply time as a parameter, the current time and a plurality of preset time intervals are obtained, the preset time interval is judged, the current power supply time is determined according to the preset time zone, and the determination result is sent to the energy storage management equipment and the energy storage analysis equipment.
For example, the predetermined time intervals are 23-6 hours, 7-10 hours, 11-13 hours, 14-17 hours, and 18-22 hours, which are power supply valley periods, common times, and power supply peak periods.
When the current time of the multiple acquisition is T1=9, T2=3, and T3=20, respectively, it is determined that T1 is in the ordinary period, T2 is in the power supply valley period, and T3 is in the power supply peak period.
When the power supply rate is used as a parameter, the power supply monitoring equipment times according to a preset unit time period, acquires all power supply amount in the unit time period in real time, judges whether the power supply amount is in a normal range, and if the power supply amount is in the normal range, the current time is in a common time period; if the power supply amount is higher than the normal range, the current moment is in a power supply peak period; and if the power supply amount is lower than the normal range, the current moment is in a power supply valley period, and the determined result is sent to the energy storage management equipment and the energy storage analysis equipment.
For example, in a 5-second timekeeping time, the total power supply amounts of the power generation equipment at three times of Q1, Q2 and Q3 in a unit time period are 7000W, 1000W and 20000W respectively, and the normal range threshold is 3000W-10000W, it is determined that Q1 is in a normal time period, Q2 is in a power supply valley time period, and Q3 is in a power supply peak time period.
And the energy storage management equipment is used for determining an energy storage equipment monitoring strategy according to the current specific power supply time period and sending the monitoring strategy to the energy storage monitoring equipment.
The monitoring policy is input power preparation information or output power preparation information of the energy storage device.
The energy storage management device is specifically configured to: if the current power supply time interval is a power supply peak time interval, namely the current power generation amount possibly cannot meet the power supply requirement, sending output power preparation information of the energy storage equipment to the energy storage monitoring equipment; if the current power supply time interval is a power supply valley time interval, namely the current power generation amount possibly exceeds the required power supply amount, transmitting power preparation information input by the energy storage equipment to the energy storage monitoring equipment; and if the current power supply time interval is a common time interval, namely the current generated energy meets the power supply requirement, the energy storage monitoring equipment is not informed.
The energy storage monitoring equipment is used for monitoring the energy storage equipment and the energy storage environment according to the received monitoring strategy, acquiring internal parameters and environmental parameters of the energy storage equipment, and then sending the parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
The energy storage device includes a battery device and a supercapacitor.
The internal parameters of the energy storage device mainly comprise the current energy storage, the standard charging speed and the standard discharging speed.
The energy storage monitoring device is specifically configured to: when the current generated energy and the electric power preparation information output by the energy storage equipment are received, monitoring internal parameters of the energy storage equipment to obtain two parameters of the current stored energy and the standard discharging speed, simultaneously monitoring the energy storage environment to obtain the environmental parameters, and sending the obtained parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
And when the energy storage monitoring equipment receives the energy storage preparation information of the energy storage equipment, monitoring internal parameters of the energy storage equipment to obtain two parameters of current stored energy and standard charging speed, and sending the obtained parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
And if the energy storage monitoring equipment does not receive any information, the energy storage equipment and the environment are not monitored.
And the energy storage analysis equipment is used for respectively calculating the comprehensive charge and discharge indexes of the energy storage equipment of different types according to the current power supply time period and the received parameters, and sequencing the charge and discharge priorities of the plurality of energy storage equipment in each type according to the result.
The comprehensive charge and discharge indexes comprise comprehensive charge indexes and comprehensive discharge indexes.
The comprehensive charging index is weighted values of three parameters of the current stored energy, the charging speed deviation and the service life value of the energy storage device, and is a numerical value between 1 and 100.
The comprehensive discharge index is weighted values of three parameters of the current stored energy, the discharge speed deviation and the service life of the energy storage device, and is a numerical value between 1 and 100.
The charging speed deviation is an absolute value of a difference value between an actual charging speed and a standard charging speed of the energy storage equipment; the discharge speed deviation is an absolute value of a difference value between the actual discharge speed and the standard discharge speed of the energy storage equipment; the actual charging rate, the actual discharging rate, and the life value are all affected by environmental parameters.
Specifically, if the current power supply time period is a power supply peak time period, the plurality of parameters received by the energy storage analysis device include the current energy storage in the energy storage device, the standard discharge speed, and the environmental parameters.
Because the energy storage devices of different types can be combined for use, respective advantages can be fully exerted, the energy storage devices of different types need to be simultaneously subjected to charge and discharge control, in addition, the charge and discharge priority ranking is carried out inside the energy storage devices of different types, and the energy storage efficiency can also be improved.
The energy storage analysis equipment firstly obtains the service life value and the actual discharge speed of each equipment according to environmental parameters aiming at a plurality of equipment of the type of the battery energy storage equipment, then obtains the discharge speed deviation of each equipment according to the actual discharge speed and the standard discharge speed, in addition, the energy storage analysis equipment obtains respective comprehensive discharge indexes according to the current energy storage, the discharge speed deviation and the service life value of each battery energy storage equipment, and finally sets a discharge priority sequence from large to small according to the comprehensive discharge indexes.
The energy storage analysis equipment also calculates the comprehensive discharge index of each super capacitor energy storage equipment in the same way as the battery energy storage equipment aiming at a plurality of super capacitor energy storage equipment types, and then sets the discharge priority order according to the comprehensive discharge index from large to small.
And if the current power supply time interval is a power supply valley time interval, the plurality of parameters received by the energy storage analysis equipment comprise the current energy storage amount in the energy storage equipment, the standard charging speed and the environmental parameters.
The energy storage analysis equipment is used for obtaining the service life value and the actual charging speed of each equipment according to environmental parameters aiming at a plurality of equipment of the type of the battery energy storage equipment, then obtaining the charging speed deviation of each equipment according to the actual charging speed and the standard charging speed by the energy storage analysis equipment, obtaining respective comprehensive charging indexes according to the current energy storage amount, the charging speed deviation and the service life value of each battery energy storage equipment by the energy storage analysis equipment, and finally setting a charging priority order from large to small according to the comprehensive charging indexes.
The energy storage analysis equipment also calculates the comprehensive charging index of each super capacitor energy storage equipment in the same way as the battery energy storage equipment aiming at a plurality of super capacitor energy storage equipment types, and then sets the charging priority order from large to small according to the comprehensive charging index.
And the energy storage control equipment is used for determining control strategies of the energy storage equipment of each type according to the energy storage equipment of each type and the generated energy and charging and discharging priority sequence of the current power generation equipment respectively, and controlling the energy storage equipment of different types to be charged and discharged simultaneously according to the specific control strategies.
The energy storage control device is specifically configured to: the current power supply time interval is the power supply peak time interval, and the energy storage equipment of different types simultaneously begins to output electric power according to the priority order of discharging separately until meeting the power supply demand.
The sum of the stored energy of all the power storage devices which output power and the generated energy of the current power generation device which meets the power supply requirement is matched with the current required power supply amount.
For example, the energy storage control device starts the first-priority device, namely the first-priority battery and the first-priority supercapacitor, and then starts the second-priority battery and the second-priority supercapacitor for the respective discharging priorities of the battery energy storage device group and the supercapacitor group, and stops starting the next group of batteries and supercapacitors until the sum of the energy storage amount and the energy generation amount of all the started batteries and supercapacitors meets the current required power supply amount.
The current power supply time interval is a power supply valley time interval, and energy storage devices of different types simultaneously start to input power according to respective charging priority sequences until all the energy storage devices are fully charged or the residual generated energy meets the power supply requirement.
The residual generated energy meets the power supply quantity requirement, and specifically, after the power generation equipment is fully filled with the current energy storage equipment, the residual generated energy is matched with the current required power supply quantity, and charging cannot be carried out temporarily.
For example, the energy storage control device charges, for the respective charging priorities of the battery energy storage device group and the supercapacitor group, a device with a first priority, that is, a battery with a first priority and a supercapacitor with the first priority, and then charges a battery with a second priority and a supercapacitor with the second priority until the power storage amounts of all the batteries and the supercapacitors are 100%, or when the remaining power generation amount after charging can only meet the current power supply requirement, stops charging the next group of batteries and supercapacitors.
In addition, if the current electric energy storage amount of part of the energy storage devices is not 100%, the difference value between the current electric energy generation amount and the required power supply amount is monitored in real time, and if the difference value meets the required charging amount of all the energy storage devices which are not fully charged currently, the energy storage devices which are not fully charged are charged simultaneously. Therefore, the charging of the energy storage equipment can be ensured, and the problem of insufficient power supply can be avoided.
In one or more exemplary designs, the functions described above in connection with the embodiments of the invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media that facilitate transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to carry or store program code in the form of instructions or data structures and which can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
The preferred embodiments of the present disclosure are described above with reference to the drawings, but the present disclosure is of course not limited to the above examples. Various changes and modifications may be made by those skilled in the art within the scope of the appended claims, and it should be understood that these changes and modifications naturally fall within the technical scope of the present disclosure.
In this specification, the steps described in the flowcharts include not only the processing performed in time series in the described order but also the processing performed in parallel or individually without necessarily being performed in time series. Further, even in the steps processed in time series, needless to say, the order can be changed as appropriate.
All of the above description is only an embodiment of the present invention, and the scope of the present invention is not limited thereto. Any changes or substitutions may be readily made by those skilled in the art.
Claims (10)
1. An electric energy storage combination management method is characterized by comprising the following steps:
step 1, monitoring the current power supply time period or power supply rate, judging the power supply time period at the current moment, and sending the result to an energy storage management device and an energy storage analysis device;
step 2, determining an energy storage device monitoring strategy according to the current specific power supply time period, and sending the monitoring strategy to the energy storage monitoring device;
step 3, monitoring the energy storage equipment and the energy storage environment according to the received monitoring strategy to obtain internal parameters and environmental parameters of the energy storage equipment, and then sending the parameters and the generated energy of the current power generation equipment to energy storage analysis equipment;
step 4, respectively calculating comprehensive charge and discharge indexes of the electricity storage devices of different types according to the current power supply time period and the received parameters, and sequencing charge and discharge priorities of the electricity storage devices in each type according to results;
and 5, determining control strategies of the energy storage devices of various types according to the energy storage devices of various types and the generated energy and charging and discharging priority sequence of the current power generation device, and controlling the energy storage devices of different types to be charged and discharged simultaneously according to specific control strategies.
2. The method of claim 1, wherein step 2 comprises:
if the current power supply time interval is the power supply peak time interval, sending output power preparation information of the energy storage equipment to the energy storage monitoring equipment;
if the current power supply time interval is a power supply valley time interval, transmitting power preparation information input by the energy storage equipment to the energy storage monitoring equipment;
and if the current power supply time interval is a common time interval, the energy storage monitoring equipment is not informed.
3. The method of claim 1, wherein step 3 comprises:
when the current generating capacity and the electric power preparation information output by the energy storage equipment are received, monitoring internal parameters of the energy storage equipment to obtain two parameters of the current energy storage and the standard discharging speed;
and monitoring the energy storage environment to obtain the environmental parameters, and sending the obtained parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment.
4. The method of claim 1, wherein step 4 comprises:
obtaining a life value and an actual discharging speed of each device in a plurality of devices of the battery energy storage device type according to the environmental parameters;
obtaining the discharge speed deviation of each device according to the actual discharge speed and the standard discharge speed;
and obtaining a corresponding comprehensive discharge index according to the current energy storage, discharge speed deviation and service life value of each device, and setting a discharge priority order according to the comprehensive discharge index from large to small.
5. The method of claim 1, wherein the step 5 comprises:
the current power supply time period is a power supply peak time period, and the energy storage devices of different types simultaneously start to output power according to respective discharging priority orders until the power supply requirement is met;
the current power supply time interval is a power supply valley time interval, and energy storage devices of different types simultaneously start to input power according to respective charging priority sequences until all the energy storage devices are fully charged or the residual generated energy meets the power supply requirement.
6. An electrical energy storage combination management system, comprising:
the power supply monitoring equipment is used for monitoring the current power supply time period or power supply rate, judging the current power supply time period and sending the result to the energy storage management equipment and the energy storage analysis equipment;
the energy storage management equipment is used for determining an energy storage equipment monitoring strategy according to the current specific power supply time period and sending the monitoring strategy to the energy storage monitoring equipment;
the energy storage monitoring equipment is used for monitoring the energy storage equipment and the energy storage environment according to the received monitoring strategy, acquiring internal parameters and environmental parameters of the energy storage equipment, and then sending the parameters and the generated energy of the current power generation equipment to the energy storage analysis equipment;
the energy storage analysis equipment is used for respectively calculating comprehensive charge and discharge indexes of the energy storage equipment of different types according to the current power supply time period and the received parameters, and performing charge and discharge priority sequencing on the plurality of energy storage equipment in each type according to results;
and the energy storage control equipment is used for determining control strategies of the energy storage equipment of each type according to the energy storage equipment of each type and the generated energy and charging and discharging priority sequence of the current power generation equipment respectively, and controlling the energy storage equipment of different types to be charged and discharged simultaneously according to specific control strategies.
7. The system of claim 6, wherein the energy storage management device is further to: if the current power supply time interval is the power supply peak time interval, sending output power preparation information of the energy storage equipment to the energy storage monitoring equipment; if the current power supply time interval is a power supply valley time interval, transmitting power preparation information input by the energy storage equipment to the energy storage monitoring equipment; and if the current power supply time interval is a common time interval, the energy storage monitoring equipment is not informed.
8. The system of claim 6, wherein the energy storage monitoring device is further configured to: when the current generating capacity and the electric power preparation information output by the energy storage equipment are received, monitoring internal parameters of the energy storage equipment to obtain two parameters of the current energy storage and the standard discharging speed; and monitoring the energy storage environment to obtain the environmental parameters, and sending the obtained parameters and the generated energy of the current power generation equipment to energy storage analysis equipment.
9. The system of claim 6, wherein the energy storage analysis device is further to: obtaining a life value and an actual discharging speed of each device in a plurality of devices of the battery energy storage device type according to the environmental parameters; obtaining the discharge speed deviation of each device according to the actual discharge speed and the standard discharge speed; and obtaining a corresponding comprehensive discharge index according to the current energy storage capacity, the discharge speed deviation and the service life value of each device, and setting a discharge priority sequence from large to small according to the comprehensive discharge index.
10. The system of claim 6, wherein the energy storage control device is further configured to: the current power supply time interval is a power supply peak time interval, and different types of energy storage equipment simultaneously start to output power according to respective discharging priority orders until power supply requirements are met; the current power supply time interval is a power supply valley time interval, and the energy storage devices of different types simultaneously start to input power according to respective charging priority sequences until all the energy storage devices are fully charged or the residual generated energy meets the power supply demand.
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