WO2015145818A1 - Dispositif de commande de réglage d'énergie et procédé de commande de réglage d'énergie - Google Patents

Dispositif de commande de réglage d'énergie et procédé de commande de réglage d'énergie Download PDF

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Publication number
WO2015145818A1
WO2015145818A1 PCT/JP2014/074774 JP2014074774W WO2015145818A1 WO 2015145818 A1 WO2015145818 A1 WO 2015145818A1 JP 2014074774 W JP2014074774 W JP 2014074774W WO 2015145818 A1 WO2015145818 A1 WO 2015145818A1
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Prior art keywords
generator
storage battery
power
amount
charge
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PCT/JP2014/074774
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English (en)
Japanese (ja)
Inventor
誠人 関
徹 赤津
吉伸 榊原
隆 荒木田
太一 野村
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株式会社日立製作所
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Publication of WO2015145818A1 publication Critical patent/WO2015145818A1/fr

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H02J3/472For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources

Definitions

  • the present invention relates to a power adjustment control device and method for adjusting and controlling the power of a storage battery and a generator linked to a power system.
  • a generator such as a diesel generator is operated as a power supply means.
  • the fuel cost is high including transportation costs.
  • the type of generator that generally generates power by consuming fuel fluctuates the amount of power generated per unit fuel depending on the size of the operating load, and there is a load zone where the most efficient operation can be performed To do. Since the load demand of the power system fluctuates from moment to moment, in general, multiple generators adjust the number of operating units according to the load demand and supply power to the load, so that the generator operates in a load state with the highest possible efficiency. Do.
  • Patent Document 1 Japanese Patent Laid-Open No. 2003-52132
  • Patent Document 2 Japanese Patent Laid-Open No. 1-97145
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2003-52132
  • a power generation system including a storage battery and a generator is controlled by controlling the charge and discharge of the storage battery so that the generator can continue to operate at the maximum efficiency output. Achieve improvements.
  • the generator was operated at a constant output for maximum efficiency. If the generator output exceeded the load demand power, the storage battery charged the surplus power, and the generator output was below the load demand power. In this case, the storage battery discharges the electric power corresponding to the insufficient electric power.
  • operation is provided by adjusting the electric power supply of a generator by charging / discharging of a storage battery.
  • Patent Document 2 Japanese Patent Laid-Open No. 1-97145
  • the state of charge of the storage battery is monitored, and when the state of charge of the storage battery decreases and reaches the lower limit, Is activated to supply power to the load, and the surplus power is charged into the storage battery to restore the state of charge of the storage battery.
  • the power generation equipment stops and supplies power from the storage battery to the load.
  • the control amount is not distributed in consideration of the operation efficiency with respect to the fuel consumption of the generator, and the operation control is performed so that the difference between the power supply and demand is exclusively covered by the generator and the storage battery. Only mentioned. As a result, the efficiency of control in the entire power generation system has not been improved due to power generation output with poor operation efficiency and insufficient utilization of storage batteries.
  • a power adjustment control device that adjusts and controls a power supply amount of a storage battery and a generator connected to a grid according to a power demand amount of a load, the power demand amount and the charging of the storage battery
  • a command unit that issues a control command to the storage battery based on the charge / discharge control amount, and the calculation unit determines the operation pattern so that the operation efficiency with respect to fuel consumption of the generator is increased
  • the charge / discharge control amount is determined from a difference between the power demand amount and a power supply amount of a generator based on the operation pattern.
  • the present invention by allocating the control amount in consideration of the operation efficiency with respect to the fuel consumption of the generator, the power generation output with good operation efficiency is increased and the use of the storage battery is promoted. Efficiency can be improved.
  • FIG. It is a block diagram which shows the structure of the electric power generation system of the Example of this invention. It is a flowchart for demonstrating the operation control of the generator 1 of the said power generation system, and the charging / discharging control flow of the storage battery 3.
  • FIG. It is a flowchart for demonstrating the calculation flow which performs the setting of the initial state of the charging / discharging control flow of the said electric power generation system, and creation of a database.
  • the charge / discharge control flows of the power generation system a calculation flow for calculating the number of operating generators 1 and the power generation output and the charge / discharge output of the storage battery 3 from the input load demand power in the supply and demand adjustment mode is described. It is a flowchart.
  • FIG. 1 shows a configuration example of the entire system including the power adjustment control device of the present invention.
  • the system includes a generator 1, a storage battery control device 2, a storage battery 3, a load demand power monitoring device 5, and a power adjustment control device 10.
  • the power adjustment control device 10 includes an input unit 11, a calculation unit 12, and a command unit 13, and is connected to the load 4.
  • the generator 1 is a device that consumes fuel and generates electric power, and is connected to a storage battery 3 via a load 4 and a storage battery control device 2.
  • a generator that consumes fuel and generates electric power has a load zone in which the amount of power generated per unit fuel varies depending on the load, and the maximum efficiency is obtained.
  • a diesel generator can be employed as the generator 1, for example.
  • a plurality of generators 1 may be provided.
  • the storage battery control device 2 monitors the state of charge of the storage battery 3 and inputs it to the input unit 11 of the power adjustment control device 10, and charges according to the storage battery control amount command value output from the command unit 13 of the power adjustment control device 10.
  • the discharge power is commanded to the storage battery 3.
  • the storage battery 3 is a battery having a charge / discharge function, and the storage battery control device 2 controls charging or discharging of the storage battery 3.
  • a secondary battery such as a lithium ion battery or a lead storage battery can be employed.
  • the load 4 is a load of the power system.
  • power consumers such as factories, hospitals, and general households are applicable.
  • the load demand power monitoring device 5 monitors and measures fluctuations in demand power of the load 4 and inputs the measured demand power to the input unit 11 in the power adjustment control device 10.
  • the power adjustment control device 10 includes an input unit 11 that receives information from the outside, a calculation unit 12 that calculates a command value by means described later, and the command value calculated by the calculation unit 12 using the generator 1 and the storage battery control device 2.
  • the command unit 13 for outputting to The input unit 11 receives a charge state of the storage battery 3 from the storage battery control device 2 and a load demand power from the load demand power monitoring device 5.
  • the calculation unit 12 calculates the number of generators 1 operated and the power generation output and the charge / discharge output of the storage battery 3 using the charge state and load demand power of the storage battery 3 input to the input unit 11, and outputs them to the command unit 13. To do.
  • the command unit 13 outputs the number of generators 1 operated and the power generation output command calculated by the calculation unit 12 to the generator 1, and outputs a charge / discharge output command for the storage battery 3 to the storage battery control device 2.
  • FIG. 2 shows the overall calculation flow.
  • 3 to 5 show the calculation flow of the subroutine in FIG.
  • step S1 initial settings and database creation are performed.
  • the calculation flow in step S1 will be described in detail in steps S16 to S19 with reference to FIG.
  • step S16 the maximum discharge output B dch [kW], the maximum charge input B ch [kW], and the battery capacity B cap [kWh] of the storage battery 3 are set.
  • a database is created for the specifications of the number n [units] of generators 1 included in this system.
  • the database includes the number i of the generator 1, the maximum efficiency output p i [kW] when the power generation efficiency with respect to the fuel consumption is maximum, and the operation efficiency ⁇ i (x) [with respect to the load demand power x [kW] of the generator.
  • the generators are numbered in descending order of maximum efficiency output. In other words, it is p 1 ⁇ p 2 ⁇ ... ⁇ p n.
  • step S18 the total value P j [kW] of the operation pattern j representing the combination of the generators to be operated among the n generators 1 and the maximum efficiency output p i of the generator 1 to be operated at the operation pattern j. ] Is set.
  • the operation pattern j refers to operating the generator j from the generator 1 with respect to the load 4.
  • the total value of the maximum efficiency outputs of the generator 1 that is operated in the operation pattern j is calculated from the following equation (1).
  • threshold values TH1, TH2, and TH3 used in the calculation of the calculation unit 12 are set.
  • TH1 is a threshold value indicating that the battery is in a state close to full charge in the operation range.
  • TH2 is a threshold value that represents a state close to complete discharge in the operation range. Note that the relationship between TH1, TH2, the fully charged state, and the fully discharged state as the storage battery capacity is the fully charged state in the operating range> TH1> TH2> the fully discharged state in the operating range.
  • TH3 is the ratio of the driving efficiency to the maximum fuel efficiency, and is a threshold value indicating that the generator 1 is operating efficiently.
  • step S ⁇ b> 2 the load demand power monitoring device 3 inputs the load demand power D (t) [kW] of the load 4 at a certain time t to the input unit 11 in the power adjustment control device 10.
  • step S ⁇ b> 3 the storage battery control device 2 receives the charge state B SOC (t) [kWh] of the storage battery 3 at time t from the storage battery 3 and outputs it to the input unit 11 in the power adjustment control device 10.
  • step S4 it is determined whether the current control mode in the calculation flow is the supply and demand adjustment mode or the substitute operation mode.
  • the generator 1 In the supply and demand adjustment mode, the generator 1 is operated at the maximum efficiency output, and when the generator output exceeds the load demand power, the storage battery 3 charges the surplus power, and the generator output falls below the load demand power. In this case, the power stored in the storage battery 3 is discharged.
  • the substitute operation mode is a state in which a sufficient amount of power is stored in the storage battery 3, the generator 1 that is operating inefficiently is stopped, and the storage battery 3 is replaced by the stopped generator 1. Electric power is supplied to the load 4 by discharging.
  • the control mode is switched according to the state of charge of the storage battery 3 in steps S11 to S15. At the start of control, the initial state of the control mode is the supply and demand adjustment mode.
  • step S5 the operating number d of the generator 1 for the load demand power D (t), the operation pattern d that is a combination of the operating generators when operating the d generators 1, and the charging of the storage battery 3
  • the discharge control amount Bx (t) [kW] is calculated.
  • the calculation flow of step S5 is described with reference to FIG. 4, and details are described in steps S20 to S24.
  • step S20 the difference between the load demand power D (t) and P 0 to P n set in Equation 1 is taken, and the charge / discharge adjustment amount B 0 to B n [ kW] is calculated from Equation 2 below.
  • the operation pattern d of the generator 1 that requires the least amount of charge / discharge adjustment of the storage battery 3 with respect to D (t) is determined.
  • the operation pattern d when the absolute values of B 0 to B n calculated by Equation 2 are the smallest is the operation pattern of the generator 1 to be obtained.
  • step S21 the charge / discharge control amount Bx (t) of the storage battery 3 at a certain time t is calculated from Equation 3.
  • Bx (t) is equal to the charge / discharge adjustment amount Bd of the storage battery 3 in the operation pattern d of the generator 1 calculated in step S20.
  • step S22 it is determined whether B x (t) calculated in Equation 3 can be output by the storage battery 3 and whether it conforms to the specifications of the storage battery 3 defined in step S16 of FIG.
  • B X (t) is lower than B ch .
  • B dch the storage battery 3 is adjusted so that the charged state of the storage battery 3 does not fall below 0% or exceed 100% by inputting / outputting B X (t). It is determined whether the following equations 4 and 5 are satisfied.
  • Equation 5 represents the total value of the set of B X from time tT to time t, and the charging state B SOC (tT) at time tT, when the state of charge of the storage battery 3 at a certain time t is represented as B SOC (t). It is determined whether or not the sum is within 0 to B cap .
  • step S23 When the charge / discharge control amount B X (t) of the storage battery 3 does not satisfy the specifications of the storage battery 3 in the above determination, the process proceeds to step S23.
  • step S24 When the charge / discharge control amount B X (t) of the storage battery 3 satisfies the specification of the storage battery 3 in the determination, the process proceeds to step S24.
  • step S23 the charge / discharge control amount B X (t) is adjusted so that the storage battery 3 can output it.
  • step S16 the power generation output of the generator 1, the number of operating units, the operating pattern, the ratio of the operating efficiency to the maximum fuel efficiency, the charge / discharge control amount of the storage battery 3, and the state of charge of the storage battery 3 are calculated in step S16. Until the calculated specifications of the generator 1 and the storage battery 3 are satisfied, the determination in step S22 and the calculation in step S23 are repeated.
  • step S24 B SOC (t) at a certain time t is calculated as shown in Equation 6 below.
  • step S6 the number d of operating generators 1, the operation pattern d, and the operation efficiency with respect to the load power demand are calculated without considering the supply and demand adjustment of the storage battery 3.
  • step S7 it is determined whether or not the calculated ratio of driving efficiency and maximum fuel efficiency is equal to or greater than a predetermined threshold TH3.
  • the generator 1 operates with a smaller number ( ⁇ d) than that calculated in step S6, and the storage battery 3 supplies the power that is insufficient with respect to the demand load power. Electric power is supplied to the load 4 by discharging. Details of the calculation flow of the substitute operation mode will be described below.
  • step S6 how many generators 1 are operated with respect to the load demand power D (t) is obtained.
  • the number of operating generators 1 the number of operating units d and the operating pattern d are calculated according to the load in the same manner as in step S20.
  • the ratio of the driving efficiency to the maximum fuel efficiency at the calculated driving pattern is calculated from the driving efficiency ⁇ i (x) [%] with respect to the load demand power set in step S17.
  • step S7 it is determined whether the ratio of the driving efficiency to the maximum fuel efficiency calculated in step S6 exceeds a predetermined threshold TH3. If the operation of the generator 1 realizes sufficiently high operation efficiency, the same processing as S5 is performed, and the command value for the generator / storage battery is determined by the control amount calculated in S6. That is, if the ratio of the driving efficiency to the maximum fuel efficiency calculated in step S6 is equal to or greater than TH3, the generator operation command value is the power generation output of the generator 1 calculated in step S6 (although not shown, S22- S24 processing is also performed). On the other hand, if the ratio of the driving efficiency to the maximum fuel efficiency calculated in step S6 is less than TH3, the process proceeds to step S8.
  • step S8 the number of operating generators 1, selection of the operating generator, the output value of the generator 1, and the discharge control amount of the storage battery 3 are calculated with respect to the load demand power.
  • the calculation flow of step S8 will be described with reference to FIG. 5, and details will be described in steps S25 to S29.
  • step S25 how many generators 1 are operated with respect to the load demand power D (t) at a certain time t is obtained.
  • the number of operating generators 1 is less than d units as described above, and the storage battery control amount B X (t) that increases the distribution of storage battery discharge output in order to utilize the storage battery as much as possible. Determine the control amount. If the number of operating units at this time is c, the total value of the maximum efficiency output of the generator 1 at the time of the operating pattern c is P c (t) expressed by the following formula 7.
  • step S27 in the same manner as in step S22, it is determined whether or not B x (t) can be output by the storage battery 3 according to the embodiment and whether it conforms to the specification of the storage battery 3 defined in step S16. If B X (t) does not satisfy the specifications of the storage battery 3 of the power generation system, the process proceeds to step S28. If B X (t) satisfies the specifications of the storage battery 3 of the power generation system, the process proceeds to step S29.
  • the power generation output of the generator 1 calculated by recalculation in this way, the number of operating units, the operating pattern, the ratio of the operating efficiency to the maximum fuel efficiency, the charge / discharge control amount of the storage battery 3, and the state of charge of the storage battery 3 are The determination in step S27 and the calculation in step S28 are repeated until the specifications of the generator 1 and the storage battery 3 calculated in step S16 are satisfied.
  • step S29 B SOC (t) at a certain time t is calculated as shown in Equation 8 below.
  • step S9 the power adjustment control device 10 inputs the generator operation command value calculated in step S5, step S6, or step S8 from the command unit 13 to the generator 1.
  • step S10 the storage battery charge / discharge command value calculated in step S5, step S6, or step S8 is input to the storage battery control device 2 from the command unit 13 to the storage battery control device 2.
  • the mode switching is determined from the charged state of the storage battery 3.
  • the supply / demand adjustment mode is switched to the substitute operation mode when the charge state of the storage battery 3 exceeds a threshold value indicating that the charge state is sufficiently high.
  • the supply / demand adjustment mode is switched from the substitute operation mode when the charge state of the storage battery 3 falls below a threshold value indicating that the charge state is sufficiently low.
  • step S11 the current control mode state is determined in step S11. If it is determined in step S11 that the current control mode is the supply and demand adjustment mode, the process proceeds to step S12. If it is determined in step S11 that the current control mode is the substitute operation mode, the process proceeds to step S13.
  • step S12 it is determined whether the current state of charge of the storage battery 3 is equal to or higher than TH1 determined in step S19. If it is determined in step S12 that the current charging state of the storage battery 3 is equal to or higher than TH1, the process proceeds to step S14. If it is less than TH1, the process proceeds to step S15. If it is determined in step S13 that the current state of charge of the storage battery 3 is greater than TH2, the process proceeds to step S14. If it is determined in step S13 that the current state of charge of the storage battery 3 is less than TH2, the process proceeds to step S15.

Abstract

 Dans des systèmes de production d'énergie classiques, la distribution de la grandeur de commande ne s'effectue pas en vue du rendement de fonctionnement relativement à la consommation de combustible d'un générateur, et aucun compte-rendu n'a été fait au-delà de la réalisation d'une commande de fonctionnement de façon à couvrir uniquement des différences dans la quantité d'énergie demandée à l'aide du générateur et d'une cellule de stockage d'énergie. En résultat, en raison d'une utilisation inadéquate de la cellule de stockage ou de la production d'énergie étant à un niveau auquel le rendement de fonctionnement est mauvais, il n'a pas été possible d'améliorer l'efficacité de commande pour le système de production d'énergie entier. En conséquence, la présente invention concerne un instrument de commande de réglage d'énergie pour effectuer une commande de réglage sur la quantité d'énergie fournie par un générateur et une cellule de stockage connectés à un système en fonction de la quantité d'énergie demandée par la charge. L'instrument de commande de réglage d'énergie est caractérisé en ce qu'il est pourvu d'une unité d'entrée dans laquelle la quantité d'énergie demandée et l'état de charge de la cellule de stockage sont introduits, d'une unité de calcul pour obtenir un modèle de fonctionnement pour le générateur et la grandeur de commande de charge/décharge de la cellule de stockage sur la base des informations introduites, et d'une unité d'instruction pour envoyer une instruction de commande au générateur sur la base du modèle de fonctionnement ou une instruction de commande à la cellule de stockage sur la base de la grandeur de commande de charge/décharge; l'unité de calcul déterminant le modèle de fonctionnement de manière que le rendement de fonctionnement relativement à la consommation de combustible du générateur augmente et déterminant la grandeur de commande de charge/décharge à partir de la différence entre la quantité d'énergie demandée et la quantité d'énergie fournie par le générateur sur la base du modèle de fonctionnement.
PCT/JP2014/074774 2014-03-25 2014-09-19 Dispositif de commande de réglage d'énergie et procédé de commande de réglage d'énergie WO2015145818A1 (fr)

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Cited By (1)

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CN110383095A (zh) * 2017-11-29 2019-10-25 株式会社东芝 评价装置、蓄电系统、评价方法以及计算机程序

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JP2006094649A (ja) * 2004-09-24 2006-04-06 Kansai Electric Power Co Inc:The 二次電池を用いた発電計画方法および発電計画装置
JP2007116805A (ja) * 2005-10-19 2007-05-10 Shikoku Res Inst Inc 電力系統の自律型分散制御システム及び制御方法
JP2011114945A (ja) * 2009-11-26 2011-06-09 Fuji Electric Systems Co Ltd 供給電力計画作成装置、そのプログラム
JP2012010454A (ja) * 2010-06-23 2012-01-12 Tokyo Electric Power Co Inc:The 火力発電機の運転計画立案装置
WO2012014332A1 (fr) * 2010-07-30 2012-02-02 株式会社 東芝 Appareil de commande de distribution de sortie
WO2013122079A1 (fr) * 2012-02-16 2013-08-22 株式会社日立製作所 Procédé et dispositif de commande de système électrique, et dispositif de gestion de batterie rechargeable

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JP2006094649A (ja) * 2004-09-24 2006-04-06 Kansai Electric Power Co Inc:The 二次電池を用いた発電計画方法および発電計画装置
JP2007116805A (ja) * 2005-10-19 2007-05-10 Shikoku Res Inst Inc 電力系統の自律型分散制御システム及び制御方法
JP2011114945A (ja) * 2009-11-26 2011-06-09 Fuji Electric Systems Co Ltd 供給電力計画作成装置、そのプログラム
JP2012010454A (ja) * 2010-06-23 2012-01-12 Tokyo Electric Power Co Inc:The 火力発電機の運転計画立案装置
WO2012014332A1 (fr) * 2010-07-30 2012-02-02 株式会社 東芝 Appareil de commande de distribution de sortie
WO2013122079A1 (fr) * 2012-02-16 2013-08-22 株式会社日立製作所 Procédé et dispositif de commande de système électrique, et dispositif de gestion de batterie rechargeable

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Publication number Priority date Publication date Assignee Title
CN110383095A (zh) * 2017-11-29 2019-10-25 株式会社东芝 评价装置、蓄电系统、评价方法以及计算机程序

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