CN115833189B - Charging and discharging control method, device and equipment of flywheel energy storage system and storage medium - Google Patents
Charging and discharging control method, device and equipment of flywheel energy storage system and storage medium Download PDFInfo
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Abstract
The invention provides a charge and discharge control method, a device, equipment and a storage medium of a flywheel energy storage system, wherein the flywheel energy storage system comprises a plurality of flywheel energy storage systems which are arranged in parallel, and the method comprises the following steps: acquiring a real-time SOC value of each flywheel energy storage system in real time and a real-time network pressure of the flywheel energy storage system; when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than the preset no-load network voltage, controlling the target flywheel energy storage system to charge according to a first charging voltage threshold; when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is smaller than the preset no-load network voltage, the target flywheel energy storage system is controlled to discharge according to a first discharge voltage threshold. The invention can adjust the charge/discharge voltage threshold of the flywheel energy storage system in real time and dynamically match with the real-time running condition of the circuit.
Description
Technical Field
The present invention relates to the field of flywheel energy storage technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling charge and discharge of a flywheel energy storage system.
Background
The flywheel energy storage system is an energy storage device for electromechanical energy conversion, and the system adopts a physical method to store energy, and realizes the mutual conversion and storage between electric energy and the mechanical kinetic energy of a flywheel running at high speed through an electric/power generation reciprocal bidirectional motor.
Flywheel energy storage systems are widely used as regeneration devices in all-line traction stations in the field of urban rail transit. Frequent starting and braking are required in the running process of urban rail transit, when the urban rail transit is braked, the motor works in a power generation state, generated electric energy is returned to the flywheel energy storage system and stored in a flywheel rotor rotating at a high speed in a mechanical energy mode, and when the rotor reaches a rated rotating speed, the speed is not increased continuously. When traction is started, the flywheel energy storage system can release energy to supply train traction.
Because rail traffic belongs to dynamic flow, train departure intervals, vehicle density and line network pressure all change at moment, at present, most of the rail transit adopts a mean value adjustment strategy, and the dynamic matching of the charge/discharge voltage threshold value of each flywheel energy storage system in the flywheel energy storage system and the real-time running condition of a line cannot be realized. Accordingly, there is a need for a method of dynamically adjusting the charge/discharge voltage threshold of each of the flywheel energy storage systems.
Disclosure of Invention
The embodiment of the invention provides a charge and discharge control method, a device, equipment and a storage medium of a flywheel energy storage system, which are used for solving the problem that the charge/discharge voltage threshold of the existing flywheel energy storage system cannot be dynamically matched with the real-time running condition of a circuit.
In a first aspect, an embodiment of the present invention provides a method for controlling charge and discharge of a flywheel energy storage system, where the flywheel energy storage system includes a plurality of flywheel energy storage systems arranged in parallel, and the method includes:
acquiring a real-time SOC value of each flywheel energy storage system in real time and a real-time network pressure of the flywheel energy storage system;
when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than the preset no-load network voltage, controlling a target flywheel energy storage system to charge according to a first charging voltage threshold, wherein the target flywheel energy storage system is any one of the flywheel energy storage systems;
when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is smaller than the preset no-load network voltage, controlling the target flywheel energy storage system to discharge according to a first discharge voltage threshold; the first charging voltage threshold and the first discharging voltage threshold are calculated according to a real-time SOC value, an initial charging voltage threshold or an initial discharging voltage threshold of the target flywheel energy storage system.
In one possible implementation manner, when detecting that all flywheel energy storage systems in only an mth traction station in the flywheel energy storage systems do not work normally, controlling the sum of real-time power of all flywheel energy storage systems in the (m+1) th or (m-1) th traction station to work according to a first preset power;
each traction station at least comprises a flywheel energy storage system, and the mth traction station is the first traction station or the last traction station; the first preset power is the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m+1 traction places or the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m-1 traction places when all flywheel energy storage systems in the flywheel energy storage systems work normally, and m is a positive integer.
In one possible implementation manner, when detecting that all flywheel energy storage systems in only an nth traction station in the flywheel energy storage systems do not work normally, controlling the sum of real-time working powers of all flywheel energy storage systems in the (n+1) th traction station to work according to a second preset power, and controlling the sum of real-time working powers of all flywheel energy storage systems in the (n-1) th traction station to work according to a third preset power;
Wherein each traction station at least comprises one flywheel energy storage system, any one traction station in the middle of the nth traction station, and the second preset power is calculated according to the distance between the nth traction station and the (n-1) th traction station, the distance between the (n+1) th traction station and the (n-1) th traction station, and the power when the flywheel energy storage systems in the (n+1) th traction station and the nth traction station work normally; the third preset power is calculated according to the distance between the nth traction place and the n+1th traction place, the distance between the n+1th traction place and the n-1 th traction place, and the power when the flywheel energy storage systems in the n-1 th traction place and the n traction places work normally.
In one possible implementation, the second preset power
The method comprises the following steps:
third preset power
The method comprises the following steps:
wherein ,
is the sum of the initial powers of all flywheel energy storage systems in the n+1th traction house, +.>
For the sum of the initial powers of all flywheel energy storage systems in the n-1 th traction house,/->
The sum of the initial powers of all flywheel energy storage systems in the nth traction station is +.>
Is the (n+1) th traction place and the (n) th traction place Distance between (I) and (II)>
Is the distance between the n-1 th traction place and the n-th traction place.
In one possible implementation, when all of the flywheel energy storage systems in the plurality of intermediate traction stations are detected to be not operating normally, the sum of the real-time power of the flywheel energy storage systems in the other traction stations is controlled to operate at the respective maximum power.
In one possible implementation, the first charge voltage threshold Δ Uct is:
△Uct= Ucsi+△Uci；
△Uci=△SOCi×Uci，Uci=Ucmax- Ucmin-△Ucsi，Ucsi=U0+△Ucsi；
△SOCi= SOCi-SOCav；
wherein Ucsi is the initial charge voltage threshold of the ith flywheel energy storage system, delta Uci is the real-time charge voltage bias value of the ith flywheel energy storage system, delta SOCi is the SOC difference value of the ith flywheel energy storage system, uci is the charge voltage bias value interval, ucmax and Ucmin are the voltage values when charging according to the maximum power or the minimum power respectively, delta Ucsi is the initial charge voltage bias value of the ith flywheel energy storage system, U0 is the preset no-load network voltage, SOCi is the real-time SOC value of the ith flywheel energy storage system, and SOCav is the average value of the real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
In one possible implementation, the first discharge voltage threshold Δ Udt is:
△Udt= Udsi+△Udi；
△Udi=△SOCi×Udi，Udi=Udmax- Udmin+△Udsi，Udsi= U0-△Udsi；
△SOCi= SOCi-SOCav；
the Udsi is an initial discharge voltage threshold value of the ith flywheel energy storage system, delta Udi is a real-time discharge voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, udi is a discharge voltage bias value interval, udmax and Udmin are voltage values when the maximum power is discharged or the minimum power is discharged respectively, the delta Udsi is an initial discharge voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is a mean value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
In a second aspect, an embodiment of the present invention provides a charge and discharge control device for a flywheel energy storage system, where the flywheel energy storage system includes a plurality of flywheel energy storage systems arranged in parallel, and the charge and discharge control device includes:
the acquisition module is used for acquiring the real-time SOC value of each flywheel energy storage system and the real-time network pressure of the flywheel energy storage system in real time;
the charging module is used for controlling the target flywheel energy storage system to charge according to a first charging voltage threshold when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than a preset no-load network voltage, wherein the target flywheel energy storage system is any one of the flywheel energy storage systems;
the discharging module is used for controlling the target flywheel energy storage system to discharge according to a first discharging voltage threshold when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is smaller than a preset no-load network voltage; the first charging voltage threshold and the first discharging voltage threshold are calculated according to a real-time SOC value, an initial charging voltage threshold or an initial discharging voltage threshold of the target flywheel energy storage system.
In one possible implementation, the method further includes: the power adjusting module is used for controlling the sum of the real-time power of all the flywheel energy storage systems in the (m+1) th or (m-1) th traction station to work according to a first preset power when detecting that all the flywheel energy storage systems in only the (m) th traction station do not work normally;
each traction station at least comprises a flywheel energy storage system, and the mth traction station is the first traction station or the last traction station; the first preset power is the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m+1 traction places or the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m-1 traction places when all flywheel energy storage systems in the flywheel energy storage systems work normally, and m is a positive integer.
In one possible implementation, the method further includes: the power adjusting module is used for controlling the sum of the real-time working powers of all the flywheel energy storage systems in the n+1th traction station to work according to the second preset power when detecting that all the flywheel energy storage systems in only the n th traction station do not work normally, and controlling the sum of the real-time working powers of all the flywheel energy storage systems in the n-1th traction station to work according to the third preset power;
Wherein each traction station at least comprises one flywheel energy storage system, any one traction station in the middle of the nth traction station, and the second preset power is calculated according to the distance between the nth traction station and the (n-1) th traction station, the distance between the (n+1) th traction station and the (n-1) th traction station, and the power when the flywheel energy storage systems in the (n+1) th traction station and the nth traction station work normally; the third preset power is calculated according to the distance between the nth traction place and the n+1th traction place, the distance between the n+1th traction place and the n-1 th traction place, and the power when the flywheel energy storage systems in the n-1 th traction place and the n traction places work normally.
In one possible implementation, the second preset power
The method comprises the following steps:
third preset power
The method comprises the following steps:
wherein ,
is the sum of the initial powers of all flywheel energy storage systems in the n+1th traction house, +.>
For the sum of the initial powers of all flywheel energy storage systems in the n-1 th traction house,/->
The sum of the initial powers of all flywheel energy storage systems in the nth traction station is +.>
For the distance between the (n+1) th traction place and the (n) th traction place, +. >
Is the distance between the n-1 th traction place and the n-th traction place.
In one possible implementation, the method further includes: and the power adjusting module is used for controlling the sum of the real-time power of the flywheel energy storage systems in the other traction stations to work according to the respective maximum power when detecting that all the flywheel energy storage systems in the plurality of intermediate traction stations do not work normally in the flywheel energy storage systems.
In one possible implementation, the first charge voltage threshold Δ Uct is:
△Uct= Ucsi+△Uci；
△Uci=△SOCi×Uci，Uci=Ucmax- Ucmin-△Ucsi，Ucsi=U0+△Ucsi；
△SOCi= SOCi-SOCav；
wherein Ucsi is the initial charge voltage threshold of the ith flywheel energy storage system, delta Uci is the real-time charge voltage bias value of the ith flywheel energy storage system, delta SOCi is the SOC difference value of the ith flywheel energy storage system, uci is the charge voltage bias value interval, ucmax and Ucmin are the voltage values when charging according to the maximum power or the minimum power respectively, delta Ucsi is the initial charge voltage bias value of the ith flywheel energy storage system, U0 is the preset no-load network voltage, SOCi is the real-time SOC value of the ith flywheel energy storage system, and SOCav is the average value of the real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
In one possible implementation, the first discharge voltage threshold Δ Udt is:
△Udt= Udsi+△Udi；
△Udi=△SOCi×Udi，Udi=Udmax- Udmin+△Udsi，Udsi= U0-△Udsi；
△SOCi= SOCi-SOCav；
The Udsi is an initial discharge voltage threshold value of the ith flywheel energy storage system, delta Udi is a real-time discharge voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, udi is a discharge voltage bias value interval, udmax and Udmin are voltage values when the maximum power is discharged or the minimum power is discharged respectively, the delta Udsi is an initial discharge voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is a mean value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
In a third aspect, an embodiment of the present invention provides an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to the first aspect or any one of the possible implementations of the first aspect, when the computer program is executed by the processor.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the invention provides a charge and discharge control method, a device, equipment and a storage medium of flywheel energy storage systems. Then, when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than a preset no-load network voltage, controlling the target flywheel energy storage system to charge according to a first charging voltage threshold; and when the real-time network voltage is smaller than the preset no-load network voltage, the target flywheel energy storage system is controlled to discharge according to the first discharge voltage threshold. Therefore, the real-time charging/discharging voltage threshold value of each flywheel energy storage system is adjusted in real time through the obtained real-time SOC value, the initial charging voltage threshold value or the initial discharging voltage threshold value of each flywheel energy storage system, and the charging and discharging effects of each flywheel energy storage system are optimized, so that the whole flywheel energy storage system is more stable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an implementation method of a charge and discharge control method of a flywheel energy storage system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a voltage power curve of a flywheel energy storage system according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a towing station provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a charge-discharge control device of a flywheel energy storage system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
As described in the background art, urban rail transit is favored by large cities due to its fast running speed, large passenger capacity and high safety, and is a popular travel option. However, huge power consumption is also brought, and how to reduce the power consumption is a problem to be solved.
The track traffic regenerative braking energy can reach 20% -40% of traction energy, and one of effective means for reducing energy consumption when a flywheel energy storage system is arranged to recover train regenerative braking energy. Flywheel energy storage systems are widely used as regeneration devices in all-line hauling stations in the field of urban rail transit.
The flywheel energy storage system generally monitors the change of the real-time network voltage to judge whether to charge and discharge the energy storage system. At present, a single flywheel energy storage system is difficult to meet the requirement of train regenerative braking, and a large-capacity flywheel is limited by a manufacturing technology, so that a plurality of flywheel energy storage systems are connected in parallel to form an integral flywheel energy storage system. Because the rail traffic belongs to dynamic flow, the train departure interval, the vehicle density and the network pressure of the line are all changed at the moment, how to improve the stability of the rail traffic, improve the effective utilization of regenerative braking energy of each flywheel energy storage system to the train, reduce the energy consumption, and enable the charging/discharging voltage threshold value of each flywheel energy storage system in the flywheel energy storage system to be dynamically matched with the real-time running condition of the line, thus becoming the problem to be solved urgently.
In order to solve the problems in the prior art, the embodiment of the invention provides a charge and discharge control method, a device, equipment and a storage medium of a flywheel energy storage system. The charge and discharge control method of the flywheel energy storage system provided by the embodiment of the invention is first described below.
Referring to fig. 1, a flowchart of an implementation method of charge and discharge control of a flywheel energy storage system provided by an embodiment of the present invention is shown, where the flywheel energy storage system includes a plurality of flywheel energy storage systems arranged in parallel, and the details are as follows:
step S110, acquiring a real-time SOC value of each flywheel energy storage system in real time and a real-time network pressure of the flywheel energy storage system.
Each flywheel energy storage system is connected with the rectifier unit in parallel and is arranged in the traction station, and the energy storage system absorbs redundant regenerative braking energy when a train brakes and releases the stored energy when the train tows so as to achieve the purposes of saving energy and stabilizing network pressure.
The real-time SOC value of each flywheel energy storage system can be obtained by monitoring the flywheel energy storage management system in each traction station in real time. The flywheel energy storage management system in each traction station sends the monitored real-time SOC value of each flywheel energy storage system to the charge and discharge control device of the flywheel energy storage system.
The real-time network pressure of the flywheel energy storage system is obtained through a voltage sensor, and the real-time network pressure of each flywheel energy storage management system is the same as the real-time network pressure of the flywheel energy storage system. And detecting the change of the real-time network pressure so as to judge the charge and discharge actions of each flywheel energy storage system in the flywheel energy storage systems.
The SOC value of each flywheel energy storage system is related to the rotational speed of the flywheel energy storage system, so that in order to ensure the stability of the whole flywheel energy storage system, the SOC value of each flywheel energy storage system in the flywheel energy storage system is required to be balanced, and therefore the rotational speed of each flywheel energy storage system in the flywheel energy storage system is ensured to be the same.
And step S120, when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than the preset no-load network voltage, controlling the target flywheel energy storage system to charge according to the first charging voltage threshold.
The target flywheel energy storage system is any one of flywheel energy storage systems. The first charging voltage threshold is calculated according to the real-time SOC value and the initial charging voltage threshold of the target flywheel energy storage system.
In the running process of the rail transit, the charging/discharging voltage threshold value needs to be dynamically adjusted due to the moment change of the line departure interval, the vehicle density and the line network pressure and in consideration of the switching state of the flywheel energy storage system in each traction station.
In order to ensure the stability of the whole flywheel energy storage system, the power of each flywheel energy storage system is ensured not to be reduced, and therefore, the rotation speed of each flywheel energy storage system in the flywheel energy storage system is required to be ensured to be the same. When the rotation speeds are different, the power of each flywheel energy storage system in the flywheel energy storage system is different, so that some flywheel energy storage systems are full, but some flywheel energy storage systems are not full, the overall power is reduced, and the effective utilization of the regenerative braking energy of each flywheel energy storage system to the train cannot be improved to the greatest extent. Therefore, an equalization of the SOC value of each of the flywheel energy storage systems is required.
When detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different, the method indicates that the running speeds of all the flywheel energy storage systems in the flywheel energy storage systems are different, and the charging voltage threshold value needs to be adjusted in time, so that the charging power of the flywheel energy storage systems is adjusted, and finally, the consistency of the SOC values among different flywheel energy storage systems is achieved, the running speeds of all the flywheel energy storage systems in the flywheel energy storage systems are convenient to be the same, and the stability of the system is provided.
As shown in fig. 2, when the flywheel energy storage system starts to charge/discharge to the maximum power stage, the voltage is proportional to the power value, and when the voltage reaches a certain value, the power remains unchanged at the maximum value.
And when the real-time network voltage is greater than the preset no-load network voltage, controlling the target flywheel energy storage system to charge according to the first charging voltage threshold. Because the real-time SOC value of each flywheel energy storage system is different, the charging voltage threshold value of each flywheel energy storage system is not identical.
In some embodiments, the first charging voltage threshold Δ Uct can be calculated by the following steps:
△Uct= Ucsi+△Uci；
△Uci=△SOCi×Uci，Uci=Ucmax- Ucmin-△Ucsi，Ucsi=U0+△Ucsi；
△SOCi= SOCi-SOCav；
wherein Ucsi is the initial charge voltage threshold of the ith flywheel energy storage system, delta Uci is the real-time charge voltage bias value of the ith flywheel energy storage system, delta SOCi is the SOC difference value of the ith flywheel energy storage system, uci is the charge voltage bias value interval, ucmax and Ucmin are the voltage values when charging according to the maximum power or the minimum power respectively, delta Ucsi is the initial charge voltage bias value of the ith flywheel energy storage system, U0 is the preset no-load network voltage, SOCi is the real-time SOC value of the ith flywheel energy storage system, and SOCav is the average value of the real-time SOC values of all the single flywheel energy storage systems in the flywheel energy storage systems.
And step S130, when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is smaller than the preset no-load network voltage, controlling the target flywheel energy storage system to discharge according to the first discharge voltage threshold.
The first discharge voltage threshold is calculated according to the real-time SOC value of the target flywheel energy storage system and the initial discharge voltage threshold.
And when the real-time network voltage is smaller than the preset no-load network voltage, the target flywheel energy storage system is controlled to discharge according to the second charging voltage threshold. Because the real-time SOC value of each flywheel energy storage system is different, the discharge voltage threshold value of each flywheel energy storage system is not identical.
In some embodiments, the first discharge voltage threshold Δ Udt can be calculated by the following steps:
△Udt= Udsi+△Udi；
△Udi=△SOCi×Udi，Udi=Udmax- Udmin+△Udsi，Udsi= U0-△Udsi；
△SOCi= SOCi-SOCav；
wherein Udsi is an initial discharge voltage threshold value of the ith flywheel energy storage system, delta Udi is a real-time discharge voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, udi is a discharge voltage bias value interval, udmax and Udmin are voltage values when discharging according to maximum power or minimum power respectively, delta Udsi is an initial discharge voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is a mean value of real-time SOC values of all flywheel energy storage systems in the whole flywheel energy storage system.
Through the adjustment of the charging/discharging voltage threshold, the discharging voltage threshold of the flywheel energy storage system with high energy storage capacity can be increased, the charging voltage threshold is reduced, the discharging voltage threshold of the flywheel energy storage system with low energy storage capacity is reduced, and the charging voltage threshold is increased, so that the purpose of balancing the SOC difference of a plurality of flywheel energy storage systems is achieved.
In addition, during operation of the integral flywheel energy storage system, portions of the flywheel energy storage system may cease to operate due to a fault or for some reason. If only one flywheel energy storage system in any traction station stops working, all flywheel energy storage systems in the traction station stop working, so that the maintenance of the traction station by workers is facilitated.
In normal operation of each traction station, a certain margin is generally reserved for capacity configuration. When all flywheel energy storage systems in the flywheel energy storage system work normally, the sum of the initial charge and discharge power of all flywheel energy storage systems in the ith traction station is generally set as
，/>
Typically half the full power value.
In some embodiments, each traction station includes at least one flywheel energy storage system, when any one or more flywheel energy storage systems in the traction stations cannot work normally, if the flywheel energy storage systems in other traction stations can still work according to their initial power, the power supply section network voltage will be too low or too high, and the flywheel energy storage systems cannot effectively utilize the regenerative braking energy of the train. Therefore, when it is detected that the flywheel energy storage system cannot work normally, the working power of the flywheel energy storage system in other traction stations needs to be adjusted in real time.
In this embodiment, when it is detected that all of the flywheel energy storage systems in any one of the traction stations at only two ends of the flywheel energy storage system are not operating properly, the power of the flywheel energy storage systems in the adjacent traction stations needs to be increased. And controlling the sum of the real-time power of all flywheel energy storage systems in the adjacent traction stations to work according to a first preset power, wherein the first preset power is the sum of the initial power of all flywheel energy storage systems in the traction stations which cannot work and the sum of the initial power of all flywheel energy storage systems in the adjacent traction stations when all flywheel energy storage systems in the flywheel energy storage systems work normally.
When all flywheel energy storage systems in the mth traction station do not work normally, the sum of the real-time power of all flywheel energy storage systems in the mth+1th or mth-1th traction station is controlled to work according to the first preset power. The mth traction place is the first traction place or the last traction place; the first preset power is the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m+1 traction places or the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m-1 traction places when all flywheel energy storage systems in the flywheel energy storage systems work normally, and m is a positive integer.
When all flywheel energy storage systems in the first traction station do not work normally, the sum of the real-time power of all flywheel energy storage systems in the second traction station
，/>
and />
All of the flywheel energy storage systems respectivelyThe flywheel energy storage systems all work normally, namely when all traction stations work normally, the sum of the initial powers of all flywheel energy storage systems in the first traction station and the sum of the initial powers of all flywheel energy storage systems in the second traction station. Similarly, when all flywheel energy storage systems in the last mth traction house do not work normally, the sum of the real-time power of all flywheel energy storage systems in the second last, i.e. the mth-1 traction house ≡>
，/>
and />
And the sum of the initial powers of all flywheel energy storage systems in the last traction station and the sum of the initial powers of all flywheel energy storage systems in the penultimate traction station respectively when all flywheel energy storage systems in the flywheel energy storage systems work normally, namely all traction stations work normally.
In some embodiments, when it is detected that all flywheel energy storage systems in any one of the traction stations in the middle do not work normally, i.e. when the flywheel energy storage system in one of the traction stations in the middle fails to exit, then the real-time operating power of the two traction stations adjacent to the shutdown traction station needs to be adjusted in real time.
In this embodiment, as shown in fig. 3, when it is detected that all flywheel energy storage systems in only the nth traction station in the flywheel energy storage systems do not normally operate, any traction station in the middle of the nth traction station is controlled to operate according to the second preset power by controlling the sum of the real-time operating powers of all flywheel energy storage systems in the (n+1) th traction station. And controlling the sum of the real-time working powers of all flywheel energy storage systems in the n-1 traction station to work according to the third preset power. The second preset power and the third preset power are related to distances among the nth traction place, the (n+1) th traction place and the (n-1) th traction place.
Exemplary, the second preset power
The method comprises the following steps: />
Third preset power
The method comprises the following steps:
wherein ,
is the sum of the initial powers of all flywheel energy storage systems in the n+1th traction house, +.>
For the sum of the initial powers of all flywheel energy storage systems in the n-1 th traction house,/->
The sum of the initial powers of all flywheel energy storage systems in the nth traction station is +.>
For the distance between the (n+1) th traction place and the (n) th traction place, +.>
Is the distance between the n-1 th traction place and the n-th traction place.
In some embodiments, when all of the flywheel energy storage systems in the plurality of intermediate traction sites are detected to be not operating properly, the sum of the real-time powers of the flywheel energy storage systems in the other traction sites is controlled to operate at the respective maximum powers.
According to the charge and discharge control method provided by the invention, firstly, the real-time SOC value of each flywheel energy storage system and the real-time network pressure of the flywheel energy storage system are obtained in real time. Then, when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than a preset no-load network voltage, controlling the target flywheel energy storage system to charge according to a first charging voltage threshold; and when the real-time network voltage is smaller than the preset no-load network voltage, the target flywheel energy storage system is controlled to discharge according to the first discharge voltage threshold. Therefore, the real-time charging/discharging voltage threshold value of each flywheel energy storage system is adjusted in real time through the obtained real-time SOC value, the initial charging voltage threshold value or the initial discharging voltage threshold value of each flywheel energy storage system, and the charging and discharging effects of each flywheel energy storage system are optimized, so that the whole flywheel energy storage system is more stable.
When the real-time SOC value of one flywheel energy storage system is higher, the discharging voltage can be increased, so that the flywheel energy storage system releases more energy in the next traction process, and the SOC value is reduced. When the real-time SOC value of the flywheel energy storage system is lower, the discharging voltage is reduced, so that the energy released by the flywheel in the next traction process is reduced, and the SOC value is increased. Through the control strategy, the SOC value of the flywheel energy storage system is always in a reasonable range, and the condition that the stability is influenced due to the fact that the SOC value is too high or too low can be avoided.
When the charge and discharge of each flywheel energy storage system are started and ended, the power cannot be reduced because the rotation speed of each flywheel energy storage system is different, so that some flywheel energy storage systems are full, and some flywheel energy storage systems are not full, so that the power of the flywheel energy storage systems is reduced.
In addition, the power values of the flywheel energy storage systems in the adjacent traction stations can be adjusted in real time according to the switching state of the flywheel energy storage systems in the traction stations, so that the problem that the network voltage of a power supply interval is too low or too high due to the fact that the flywheel energy storage systems are withdrawn can be solved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
Based on the charge and discharge control method of the flywheel energy storage system provided by the embodiment, correspondingly, the invention further provides a specific implementation mode of the charge and discharge control device of the flywheel energy storage system, which is applied to the charge and discharge control method of the flywheel energy storage system. Please refer to the following examples.
As shown in fig. 4, there is provided a charge and discharge control device 400 of a flywheel energy storage system, wherein the flywheel energy storage system includes a plurality of flywheel energy storage systems arranged in parallel, and the charge and discharge control device 400 includes:
the acquisition module 410 is configured to acquire a real-time SOC value of each flywheel energy storage system in real time, and a real-time network pressure of the flywheel energy storage system;
the charging module 420 is configured to control the target flywheel energy storage system to charge according to the first charging voltage threshold when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is greater than the preset no-load network voltage, where the target flywheel energy storage system is any one of the flywheel energy storage systems;
the discharging module 430 is configured to control the target flywheel energy storage system to discharge according to the first discharging voltage threshold when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is less than the preset no-load network voltage; the first charging voltage threshold and the first discharging voltage threshold are calculated according to a real-time SOC value, an initial charging voltage threshold or an initial discharging voltage threshold of the target flywheel energy storage system.
In a possible implementation manner, the system further includes a power adjustment module 440, configured to control the sum of the real-time power of all the flywheel energy storage systems in the (m+1) th or (m-1) th traction station to operate according to the first preset power when it is detected that all the flywheel energy storage systems in only the (m) th traction station do not operate normally;
each traction station at least comprises a flywheel energy storage system, and the mth traction station is the first traction station or the last traction station; the first preset power is the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m+1 traction places or the sum of the initial powers of all flywheel energy storage systems in the mth traction place and the sum of the initial powers of all flywheel energy storage systems in the m-1 traction places when all flywheel energy storage systems in the flywheel energy storage systems work normally, and m is a positive integer.
In one possible implementation, the method further includes: the power adjustment module 440 is configured to, when detecting that only all flywheel energy storage systems in the nth traction station of the flywheel energy storage systems do not normally operate, control the sum of real-time operating powers of all flywheel energy storage systems in the (n+1) th traction station to operate according to the second preset power, and control the sum of real-time operating powers of all flywheel energy storage systems in the (n-1) th traction station to operate according to the third preset power;
Wherein each traction station at least comprises one flywheel energy storage system, any one traction station in the middle of the nth traction station, and the second preset power is calculated according to the distance between the nth traction station and the (n-1) th traction station, the distance between the (n+1) th traction station and the (n-1) th traction station, and the power when the flywheel energy storage systems in the (n+1) th traction station and the nth traction station work normally; the third preset power is calculated according to the distance between the nth traction place and the n+1th traction place, the distance between the n+1th traction place and the n-1 th traction place, and the power when the flywheel energy storage systems in the n-1 th traction place and the n traction places work normally.
In one possible implementation, the second preset power
The method comprises the following steps:
third preset power
The method comprises the following steps:
wherein ,
is the sum of the initial powers of all flywheel energy storage systems in the n+1th traction house, +.>
For the sum of the initial powers of all flywheel energy storage systems in the n-1 th traction house,/->
The sum of the initial powers of all flywheel energy storage systems in the nth traction station is +.>
For the distance between the (n+1) th traction place and the (n) th traction place, +. >
Is the distance between the n-1 th traction place and the n-th traction place.
In one possible implementation, the method further includes: and the power adjustment module 440 is configured to control the sum of the real-time powers of the flywheel energy storage systems in the other traction stations to operate according to the respective maximum powers when it is detected that all flywheel energy storage systems in the plurality of intermediate traction stations are not operating normally.
In one possible implementation, the first charge voltage threshold Δ Uct is:
△Uct= Ucsi+△Uci；
△Uci=△SOCi×Uci，Uci=Ucmax- Ucmin-△Ucsi，Ucsi=U0+△Ucsi；
△SOCi= SOCi-SOCav；
wherein Ucsi is the initial charge voltage threshold of the ith flywheel energy storage system, delta Uci is the real-time charge voltage bias value of the ith flywheel energy storage system, delta SOCi is the SOC difference value of the ith flywheel energy storage system, uci is the charge voltage bias value interval, ucmax and Ucmin are the voltage values when charging according to the maximum power or the minimum power respectively, delta Ucsi is the initial charge voltage bias value of the ith flywheel energy storage system, U0 is the preset no-load network voltage, SOCi is the real-time SOC value of the ith flywheel energy storage system, and SOCav is the average value of the real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
In one possible implementation, the first discharge voltage threshold Δ Udt is:
△Udt= Udsi+△Udi；
△Udi=△SOCi×Udi，Udi=Udmax- Udmin+△Udsi，Udsi= U0-△Udsi；
△SOCi= SOCi-SOCav；
The Udsi is an initial discharge voltage threshold value of the ith flywheel energy storage system, delta Udi is a real-time discharge voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, udi is a discharge voltage bias value interval, udmax and Udmin are voltage values when the maximum power is discharged or the minimum power is discharged respectively, the delta Udsi is an initial discharge voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is a mean value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
Fig. 5 is a schematic diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 5, the electronic apparatus 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52 stored in said memory 51 and executable on said processor 50. The processor 50, when executing the computer program 52, implements the steps of the embodiments of the charge and discharge control method of each flywheel energy storage system described above, such as steps 110 to 130 shown in fig. 1. Alternatively, the processor 50, when executing the computer program 52, performs the functions of the modules of the apparatus embodiments described above, such as the functions of the modules 410-430 shown in fig. 4.
By way of example, the computer program 52 may be partitioned into one or more modules that are stored in the memory 51 and executed by the processor 50 to perform the present invention. The one or more modules may be a series of computer program instruction segments capable of performing the specified functions describing the execution of the computer program 52 in the electronic device 5. For example, the computer program 52 may be partitioned into modules 410 through 430 shown in FIG. 4.
The electronic device 5 may include, but is not limited to, a processor 50, a memory 51. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the electronic device 5 and is not meant to be limiting as the electronic device 5 may include more or fewer components than shown, or may combine certain components, or different components, e.g., the electronic device may further include an input-output device, a network access device, a bus, etc.
The processor 50 may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application SpecificIntegrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may be an internal storage unit of the electronic device 5, such as a hard disk or a memory of the electronic device 5. The memory 51 may be an external storage device of the electronic device 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electronic device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the electronic device 5. The memory 51 is used for storing the computer program and other programs and data required by the electronic device. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/electronic device and method may be implemented in other manners. For example, the apparatus/electronic device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the foregoing embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the charge and discharge control method embodiment of each flywheel energy storage system when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (8)
1. The charge and discharge control method of the flywheel energy storage system is characterized in that the flywheel energy storage system comprises a plurality of flywheel energy storage systems which are arranged in parallel, and the charge and discharge control method comprises the following steps:
acquiring a real-time SOC value of each flywheel energy storage system in real time and a real-time network pressure of the flywheel energy storage system;
when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different, and the real-time network voltage is larger than a preset no-load network voltage, controlling a target flywheel energy storage system to charge according to a first charging voltage threshold, wherein the target flywheel energy storage system is any one flywheel energy storage system in the flywheel energy storage systems;
When detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is smaller than a preset no-load network voltage, controlling the target flywheel energy storage system to discharge according to a first discharge voltage threshold; the first charging voltage threshold and the first discharging voltage threshold are calculated according to a real-time SOC value, an initial charging voltage threshold or an initial discharging voltage threshold of the target flywheel energy storage system;
the first charging voltage threshold Δ Uct is:
△Uct= Ucsi+△Uci；
△Uci=△SOCi×Uci，Uci=Ucmax- Ucmin-△Ucsi，Ucsi=U0+△Ucsi；
△SOCi= SOCi-SOCav；
the first discharge voltage threshold Δ Udt is:
△Udt= Udsi+△Udi；
△Udi=△SOCi×Udi，Udi=Udmax- Udmin+△Udsi，Udsi= U0-△Udsi；
△SOCi= SOCi-SOCav；
the Ucsi is an initial charging voltage threshold value of an ith flywheel energy storage system, delta Uci is a real-time charging voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, uci is a charging voltage bias value interval, ucmax and Ucmin are voltage values when the flywheel energy storage system is charged according to maximum power or minimum power respectively, delta Ucsi is an initial charging voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is a mean value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage system; the Udsi is an initial discharge voltage threshold value of the ith flywheel energy storage system, delta Udi is a real-time discharge voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, udi is a discharge voltage bias value interval, udmax and Udmin are voltage values when the maximum power is discharged or the minimum power is discharged respectively, delta Udsi is an initial discharge voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is an average value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
2. The charge-discharge control method according to claim 1, characterized in that the charge-discharge control method further comprises:
when detecting that all flywheel energy storage systems in only an mth traction station in the flywheel energy storage systems do not work normally, controlling the sum of the real-time power of all flywheel energy storage systems in the (m+1) th or (m-1) th traction station to work according to a first preset power;
each traction station comprises at least one flywheel energy storage system, and the mth traction station is the first traction station or the last traction station; the first preset power is the sum of the initial powers of all flywheel energy storage systems in the mth traction station and the sum of the initial powers of all flywheel energy storage systems in the m+1 traction stations or the sum of the initial powers of all flywheel energy storage systems in the mth traction station and the sum of the initial powers of all flywheel energy storage systems in the m-1 traction stations when all flywheel energy storage systems in the flywheel energy storage systems work normally, and m is a positive integer.
3. The charge-discharge control method according to claim 1, characterized in that the charge-discharge control method further comprises:
when detecting that all flywheel energy storage systems in only the nth traction station do not work normally in the flywheel energy storage systems, controlling the sum of real-time working powers of all flywheel energy storage systems in the (n+1) th traction station to work according to second preset power, and controlling the sum of real-time working powers of all flywheel energy storage systems in the (n-1) th traction station to work according to third preset power; each traction station at least comprises one flywheel energy storage system, the nth traction station is any traction station in the middle, and the second preset power is calculated according to the distance between the nth traction station and the (n-1) th traction station, the distance between the (n+1) th traction station and the (n-1) th traction station, and the power when the flywheel energy storage systems in the (n+1) th traction station and the nth traction station work normally; the third preset power is calculated according to the distance between the nth traction place and the n+1th traction place, the distance between the n+1th traction place and the n-1 th traction place, and the power when the flywheel energy storage systems in the n-1 th traction place and the n traction places work normally.
4. The charge-discharge control method according to claim 3, wherein the second preset power
The method comprises the following steps:
the third preset power
The method comprises the following steps:
wherein ,
for the sum of the initial powers of all flywheel energy storage systems within the n+1th traction house, +.>
For the sum of the initial power of all flywheel energy storage systems within the n-1 th traction house,
5. The charge-discharge control method according to claim 1, characterized in that the charge-discharge control method further comprises:
when detecting that all flywheel energy storage systems in the plurality of intermediate traction stations do not work normally in the flywheel energy storage systems, controlling the sum of the real-time power of the flywheel energy storage systems in the other traction stations to work according to the respective maximum power.
6. A charge-discharge control device of a flywheel energy storage system, wherein the flywheel energy storage system comprises a plurality of flywheel energy storage systems which are arranged in parallel, the charge-discharge control device comprises:
The acquisition module is used for acquiring the real-time SOC value of each flywheel energy storage system in real time and the real-time network pressure of the flywheel energy storage system;
the charging module is used for controlling a target flywheel energy storage system to charge according to a first charging voltage threshold when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is larger than a preset no-load network voltage, wherein the target flywheel energy storage system is any one flywheel energy storage system in the flywheel energy storage systems;
the discharging module is used for controlling the target flywheel energy storage system to discharge according to a first discharging voltage threshold when detecting that the real-time SOC values of at least 2 flywheel energy storage systems in the flywheel energy storage systems are different and the real-time network voltage is smaller than a preset no-load network voltage; the first charging voltage threshold and the first discharging voltage threshold are calculated according to a real-time SOC value, an initial charging voltage threshold or an initial discharging voltage threshold of the target flywheel energy storage system;
the first charging voltage threshold Δ Uct is:
△Uct= Ucsi+△Uci；
△Uci=△SOCi×Uci，Uci=Ucmax- Ucmin-△Ucsi，Ucsi=U0+△Ucsi；
△SOCi= SOCi-SOCav；
the first discharge voltage threshold Δ Udt is:
△Udt= Udsi+△Udi；
△Udi=△SOCi×Udi，Udi=Udmax- Udmin+△Udsi，Udsi= U0-△Udsi；
△SOCi= SOCi-SOCav；
the Ucsi is an initial charging voltage threshold value of an ith flywheel energy storage system, delta Uci is a real-time charging voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, uci is a charging voltage bias value interval, ucmax and Ucmin are voltage values when the flywheel energy storage system is charged according to maximum power or minimum power respectively, delta Ucsi is an initial charging voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is a mean value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage system; the Udsi is an initial discharge voltage threshold value of the ith flywheel energy storage system, delta Udi is a real-time discharge voltage bias value of the ith flywheel energy storage system, delta SOCi is an SOC difference value of the ith flywheel energy storage system, udi is a discharge voltage bias value interval, udmax and Udmin are voltage values when the maximum power is discharged or the minimum power is discharged respectively, delta Udsi is an initial discharge voltage bias value of the ith flywheel energy storage system, U0 is a preset no-load network voltage, SOCi is a real-time SOC value of the ith flywheel energy storage system, and SOCav is an average value of real-time SOC values of all flywheel energy storage systems in the flywheel energy storage systems.
7. An electronic device comprising a memory for storing a computer program and a processor for invoking and running the computer program stored in the memory to perform the method of any of claims 1 to 5.
8. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 5.
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| CN113629740B (en) * | 2021-09-07 | 2024-06-25 | 盾石磁能科技有限责任公司 | Power control method and device for accessing flywheel energy storage system into alternating current power grid |
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| CN115441487A (en) * | 2022-08-17 | 2022-12-06 | 福建时代星云科技有限公司 | SOC (system on chip) balancing method and terminal of common DC bus energy storage system |
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| CN113381426A (en) * | 2021-07-16 | 2021-09-10 | 盾石磁能科技有限责任公司 | Capacity configuration method of flywheel energy storage device, terminal and storage medium |
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