WO2007104167A1 - Method for operating a battery energy storage system (bess) and battery energy storage system - Google Patents

Method for operating a battery energy storage system (bess) and battery energy storage system Download PDF

Info

Publication number
WO2007104167A1
WO2007104167A1 PCT/CH2006/000157 CH2006000157W WO2007104167A1 WO 2007104167 A1 WO2007104167 A1 WO 2007104167A1 CH 2006000157 W CH2006000157 W CH 2006000157W WO 2007104167 A1 WO2007104167 A1 WO 2007104167A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
charge
soc
state
grid
Prior art date
Application number
PCT/CH2006/000157
Other languages
French (fr)
Inventor
Christian Ohler
Alexander Oudalov
Daniel Chartouni
Original Assignee
Abb Research Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Research Ltd filed Critical Abb Research Ltd
Priority to PCT/CH2006/000157 priority Critical patent/WO2007104167A1/en
Publication of WO2007104167A1 publication Critical patent/WO2007104167A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]

Definitions

  • the present invention relates generally to the configuration and operation of an electric power system.
  • the invention refers to a method for operating a battery energy storage system (BESS) and a battery energy storage system for conducting said method.
  • BESS battery energy storage system
  • the electric power system is unique in that aggregate production and consumption must be matched instantaneously and continuously. Therefore, the electric power system needs a momentary balancing reserve in order to respond to sudden imbalances between generation and consumption that follow unexpected loss of generating units or transmission lines, as well as the daily load forecast errors.
  • a balancing reserve is usually provided by thermal and hydroelectric generators that are synchronized with a grid or electric power transmission / distribution network.
  • the balancing reserve can be ramped up quickly to provide reserve power.
  • Power systems usually keep enough balancing reserves available to compensate for the worst credible contingency. This is typically either the loss of the largest generation unit or a fixed percentage of the system peak load e.g. occurring in the morning or evening hours where additional electric power is needed in cities.
  • a bulk battery energy storage system can be an effective supplier of such a balancing reserve.
  • the BESS acts as other suppliers of balancing reserve by absorbing power from the grid when the actual frequency is above a defined frequency dead band and by providing power into the grid when the actual frequency is below the frequency dead band.
  • BESS - can supply power of several ten to hundred megawatt (MW) for minutes up to hours of balancing reserve.
  • Fig. 4 illustrates the BESS power output (P ou t at discharge condition or Pj n at charge condition) due to the measured deviation of the frequency f of the grid from the frequency dead band FD. When f exceeds the frequency dead band FD, power is taken from the grid by charging the BESS (Pc h arge in Fig.
  • BESS delivers energy to the grid by being discharged (Pdisc ha rg e in Fig. 4).
  • the frequency lies within the dead band FD, there is neither a power output nor a power input at BESS (zero power at vertical line in the right part of Fig. 4).
  • the state-of-charge of the battery is monitored; - the battery is charged from an electric power distributing grid or network, if the state-of-charge is below the first setpoint;
  • the electric energy is dissipated in energy dissipating means, preferably a resistor, if the battery is fully charged. In a preferred embodiment of the invention the electric energy is dissipated, if the battery is fully charged.
  • the battery is charged at a modest rate, especially at a rate of 0.1-10% of nominal power, if the state-of-charge is below the first setpoint.
  • the predetermined first and/or second setpoints are dynamically adjusted during the operation of the battery energy storage system.
  • the predetermined first and/or second setpoints are dynamically adjusted based on historic frequency data of the grid.
  • the predetermined first and/or second setpoints can be dynamically adjusted based on the current state of the power system or grid, respectively.
  • the first setpoint and/or the second setpoint are predetermined to be a certain percentage of the maximum state-of-charge of the battery.
  • Another embodiment of the invention is characterized in that the battery is charged at a rate-of-charge, which is a function of the current state-of-charge and/or historic frequency data of the grid.
  • the battery energy storage system for conducting the method according to claim 1 is characterized in that monitoring means are provided for monitoring the actual state-of-charge of the battery, and that the control unit is equipped to compare the actual state-of-charge with a predetermined first lower setpoint for the state-of- charge of the battery and a predetermined second upper setpoint for the state-of- charge of the battery.
  • controllable energy dissipating means are connected to the battery, and said energy dissipating means are controlled by said control unit.
  • the energy dissipating means may comprise a resistor.
  • a data storage is connected to said control unit for storing data related to the historical variation with time of the frequency of the grid and/or historical variations of operation parameters of the battery storage system.
  • Fig. 1 shows a simplified schematic diagram of a BESS in accordance with an embodiment of the invention
  • Fig. 2 shows a simplified diagram of a control scheme of the BESS of
  • FIG. 1 according to an embodiment of the invention
  • Fig. 3 actual curves of the power delivered or absorbed by the BESS of Fig. 1, and its corresponding load condition (state of charge SoC);
  • Fig. 4 the BESS charge and discharge characteristic as a function of the frequency deviation from a frequency dead band FD: '
  • the BESS comprises a battery and additionally resistors.
  • the resistors may be used in the situation where the battery is fully charged (and is unable to further absorb power from the grid) and the frequency of the grid increases above the dead band so that power has to be absorbed for balancing purposes.
  • the BESS operation is the following:
  • the results of analysis are used to dimension the BESS capacity for a supplied balancing reserve power (use in the design and planning phase).
  • the minimum capacity allows minimizing the installation and maintenance cost of the BESS. This minimization is achieved by using a novel BESS operating strategy that also uses the analysis of the same historic frequency data and further data gathered during the operation of the BESS.
  • This invention relates generally to the operating strategy of the BESS and more specifically, concerns a method, which is capable not only to provide a balancing reserve but also to minimize the operating cost of the BESS based on the analysis of historic frequency data.
  • the invention provides an operation algorithm of a BESS for providing a balancing reserve.
  • the target of this algorithm is to maintain the state of charge of the BESS above a minimum and below a maximum and to achieve this target at a minimum operating cost.
  • the operating cost is influenced by the following parameters: - The rate of charge during periods when the BESS has to be recharged after a sequence of discharge events.
  • the BESS In order to be capable to absorb or supply power in the case of large frequency deviations (e.g. trip of a large power unit) the BESS has to have sufficient margin in both (charge and discharge) directions, i.e. it needs to be only partially charged.
  • Fig. 1 shows a simplified schematic diagram of a BESS in accordance with an embodiment of the invention.
  • the battery energy storage system or BESS 10 of Fig. 1 comprises a battery 11 , which may consist of a plurality of battery strings 11a-d, each battery string 11a-d comprising a plurality of individual battery cells.
  • the battery strings 11a-d can be switched on and off within the system by means of suitable switches 17.
  • the battery 11 is connected to the DC side of a converter 14, which converts DC current to AC current (during a discharge of the battery 11), and vice versa (when the battery 11 is charged).
  • the converter 14 contains bridges of power semiconductor elements, like GTOs or IGCTs.
  • the AC side of the converter 14 is connected to the grid 16 to be balanced by means of a converter transformer 15.
  • a dc filter circuit 12 is provided at the DC side of the converter.
  • the battery 11 may be connected to an energy-dissipating resistor 13 (or a plurality of resistors) by means of separate switches 18.
  • the battery energy storage system 10 of Fig. 1 is part of a control scheme, which is shown in Fig. 2.
  • the grid 16 is monitored by means of a grid-monitoring device 21 , which is connected to an input of a central control unit 20 via an input line 28.
  • a second input (and output) line 27 connects data storage 19 to another input of the control unit 20.
  • the data storage 19 is used to store historical frequency data of the grid or data derived from these frequency data.
  • the data stored in the data storage 19 are used to optimize the operation of the BESS with regard to charge and discharge events, which can be expected based on the historical behaviour of the grid 16.
  • the data in data storage 19 shall be constantly updated during operation (taking into account new measurements) by transferring data from the control unit 20 to data storage 19 via line 27.
  • Another input of the control unit receives signals from a SoC monitoring device 29, which monitors the actual state-of-charge SoC of the battery 11.
  • the battery 11 which is shown as a container in Fig. 2, has a maximum state-of-charge SoC ma ⁇ , which is equivalent to the volume of the container.
  • two state-of-charge setpoints SoC1 and SoC2 are introduced to determine an area, within which the state-of-charge SoC shall be kept during operation.
  • the setpoints SoC1 and SoC2 will be set within the control unit 20, external control lines 23, 24 have been drawn from the control unit 20 to the battery 11 in Fig. 2 to visualize the process.
  • Further control lines 25 and 26 run from the control unit 20 to the converter 14 and resistor 13. They are used to control the dissipation process within the resistor 13 and the charge or discharge as well as the rate of charge and discharge of the battery 11 via the converter 14.
  • the state of charge (SoC) of the BESS is essentially kept above a first (minimum) SoC setpoint SoC1 and below a second (maximum) SoC setpoint SoC2. • This is achieved by o (i) charging the battery 11 , preferably at a modest rate (0.1-10% of nominal power), if the SoC is below the minimum setpoint SoC1 , o (ii) selling electricity, preferably on the spot or intra-day market, if the
  • SoC is above the maximum setpoint SoC2, and o (iii) dissipating energy, especially in resistors 13, if the battery 11 is fully charged (SoC max in Fig. 2).
  • SoC max in Fig. 2 SoC max in Fig. 2.
  • the maximum and minimum SoC setpoints SoC1 , SoC2 can be dynamically adjusted.
  • a dynamic adjustment of the minimum and maximum state of charge setpoints SoC1 and SoC2 may be based on the results of historic frequency data analysis of the grid 16 and may depend on the current state of the power system or grid. For example, the maximum SoC setpoint SoC2 can be decreased during a transition from one hour to another in the morning of working day, etc.
  • SoC setpoints SoC1 , SoC2 for the BESS o Hourly (variation of generation/consumption schedules) o Daily (day and night differences in system inertia) o Weekly (working days and weekends difference in system inertia) o Yearly (winter and summer difference in system inertia)
  • the rate of charge of the BESS can be any discrete or continuous function of both the current SoC of the BESS and the historic frequency data.
  • Fig. 3 An actual example of the operation strategy according to the invention is shown in Fig. 3.
  • the upper part of Fig. 3 shows the power of the battery P versus time t.
  • the power of the battery P being positive, when the power flows into the battery, and being negative, when the power is discharged from the battery.
  • the lower part of Fig. 3 shows the actual state-of-charge SoC of the battery versus time t, which determines in its relation to the two setpoints SoC1 and SoC2, how the energy flow to and from the battery is controlled.
  • the battery absorbs energy (A), thereby increasing the SoC beyond the upper setpoint SoC2.
  • the resistor is switched on and energy is dissipated by means of the resistor (B, dashed line).
  • B dashed line
  • the battery is discharged and energy is sold (C), thereby decreasing the SoC below the upper setpoint SoC2 to be just above setpoint SoC1 at h7.00 (in this example not only the discharge (at C) but also the balancing power is additionally discharged into the grid due to the low system frequency between 6.05h and 6.4Oh).
  • the SoC After having supplied the grid with energy at around h7.15 (D), the SoC falls below the lower setpoint SoC1 and energy has to be bought between h7.25 and h ⁇ .00 (E) for the SoC to enter again the SoC band between the two setpoints SoC1 and SoC2.
  • BESS battery energy storage system

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The present invention relates to a method for operating a battery energy storage system (10), said battery energy storage system (10) comprising a battery (11) capable of being charged to a maximum state-of charge (SoCmax), which battery (11 ) is connected to a grid (16) for controllably discharging energy into the grid (16) or being charged from the grid (16). The effort of installation and operation can be minimized by modifying the method to comprise the following steps: predetermining a first lower setpoint (SoC1) for the state-of-charge (SoC) of the battery (11); - predetermining a second upper setpoint (SoC2) below said maximum state-of charge (SoCmax) for the state-of-charge (SoC) of the battery (11); - essentially keeping the state-of-charge (SoC) of the battery (11) above said first SoC setpoint (SoC1) and below said second SoC setpoint (SoC2); whereby - the state-of-charge (SoC) of the battery (11) is monitored; - the battery (11) is charged from the grid (16), if the state-of-charge (SoC) is below the first setpoint (SoC1); - electric energy is discharged from the battery (11) into the grid (16), if the state-of-charge (SoC) is above the upper setpoint (SoC2).

Description

DESCRIPTION
METHOD FOR OPERATING A BATTERY ENERGY STORAGE SYSTEM (BESS)
AND BATTERY ENERGY STORAGE SYSTEM
FIELD OF THE INVENTION
The present invention relates generally to the configuration and operation of an electric power system. The invention refers to a method for operating a battery energy storage system (BESS) and a battery energy storage system for conducting said method.
BACKGROUND OF THE INVENTION
The electric power system is unique in that aggregate production and consumption must be matched instantaneously and continuously. Therefore, the electric power system needs a momentary balancing reserve in order to respond to sudden imbalances between generation and consumption that follow unexpected loss of generating units or transmission lines, as well as the daily load forecast errors.
A balancing reserve is usually provided by thermal and hydroelectric generators that are synchronized with a grid or electric power transmission / distribution network. The balancing reserve can be ramped up quickly to provide reserve power. Power systems usually keep enough balancing reserves available to compensate for the worst credible contingency. This is typically either the loss of the largest generation unit or a fixed percentage of the system peak load e.g. occurring in the morning or evening hours where additional electric power is needed in cities.
A bulk battery energy storage system (BESS) can be an effective supplier of such a balancing reserve. The BESS acts as other suppliers of balancing reserve by absorbing power from the grid when the actual frequency is above a defined frequency dead band and by providing power into the grid when the actual frequency is below the frequency dead band. In times of system peak loads BESS - can supply power of several ten to hundred megawatt (MW) for minutes up to hours of balancing reserve. Fig. 4 illustrates the BESS power output (Pout at discharge condition or Pjn at charge condition) due to the measured deviation of the frequency f of the grid from the frequency dead band FD. When f exceeds the frequency dead band FD, power is taken from the grid by charging the BESS (Pcharge in Fig. 4). On the other hand, when f is below the frequency dead band FD, BESS delivers energy to the grid by being discharged (Pdischarge in Fig. 4). When the frequency lies within the dead band FD, there is neither a power output nor a power input at BESS (zero power at vertical line in the right part of Fig. 4).
Using a BESS for the supply of a balancing reserve has been dedicated in the article by D. Kottick and M. Blau, Operational and economic benefits of battery energy storage plants, Electrical Power and Energy Systems, vol.15, no.6, 1993, pp.345-349, in the patent JP-57156674 and as well as in the report by: Tim DeVries et al., Cold Storage, Battery energy storage system for Golden Valley Electric Association, ABB Review 1 (2004), p. 38-43, concerned electrical island applications.
In general, practical BESS installations tend to be over-dimensioned capacity- wise. This increased substantially the cost of the solution.
DESCRIPTION OF THE INVENTION
It is therefore an objective of the invention, to reduce the number and size of capacitors, which reduce the effort and cost for installing and operating the system to supply a balancing reserve.
This objective is achieved by a method and system according to claims 1 and 10. Further preferred embodiments are disclosed in the dependent claims.
The inventive method is characterized by the steps of:
- predetermining a first lower setpoint for the state-of-charge of the battery; - predetermining a second upper setpoint below said maximum state-of charge for the state-of-charge of the battery;
- essentially keeping the state-of-charge of the battery above said first SoC setpoint and below said second SoC setpoint; whereby
- the state-of-charge of the battery is monitored; - the battery is charged from an electric power distributing grid or network, if the state-of-charge is below the first setpoint;
- electric energy is discharged from the battery into the grid, if the state-of- charge is above the upper set point.
According to one embodiment of the invention, the electric energy is dissipated in energy dissipating means, preferably a resistor, if the battery is fully charged. In a preferred embodiment of the invention the electric energy is dissipated, if the battery is fully charged.
Preferably, the battery is charged at a modest rate, especially at a rate of 0.1-10% of nominal power, if the state-of-charge is below the first setpoint.
According to another embodiment of the invention the predetermined first and/or second setpoints are dynamically adjusted during the operation of the battery energy storage system. Preferably, the predetermined first and/or second setpoints are dynamically adjusted based on historic frequency data of the grid.
Furthermore, the predetermined first and/or second setpoints can be dynamically adjusted based on the current state of the power system or grid, respectively.
According to another embodiment of the invention the first setpoint and/or the second setpoint are predetermined to be a certain percentage of the maximum state-of-charge of the battery.
Another embodiment of the invention is characterized in that the battery is charged at a rate-of-charge, which is a function of the current state-of-charge and/or historic frequency data of the grid.
The battery energy storage system for conducting the method according to claim 1 is characterized in that monitoring means are provided for monitoring the actual state-of-charge of the battery, and that the control unit is equipped to compare the actual state-of-charge with a predetermined first lower setpoint for the state-of- charge of the battery and a predetermined second upper setpoint for the state-of- charge of the battery.
In a preferred embodiment of the inventive system controllable energy dissipating means are connected to the battery, and said energy dissipating means are controlled by said control unit. Especially, the energy dissipating means may comprise a resistor.
According to another embodiment of the inventive system a data storage is connected to said control unit for storing data related to the historical variation with time of the frequency of the grid and/or historical variations of operation parameters of the battery storage system.
It is also preferred, that electric energy is sold on the spot or intra-day market, if the state-of-charge of the battery is above the upper set point.
BRIEF DESCRIPTION OF THE DRAWINGS
The subject matter of the invention will be explained in more detail in the following text with reference to preferred exemplary embodiments, which are illustrated in the attached drawings, in which:
Fig. 1 shows a simplified schematic diagram of a BESS in accordance with an embodiment of the invention;
Fig. 2 shows a simplified diagram of a control scheme of the BESS of
Fig. 1 according to an embodiment of the invention;
Fig. 3 actual curves of the power delivered or absorbed by the BESS of Fig. 1, and its corresponding load condition (state of charge SoC); and
Fig. 4 the BESS charge and discharge characteristic as a function of the frequency deviation from a frequency dead band FD: '
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The BESS according to a preferred embodiment of the invention comprises a battery and additionally resistors. The resistors may be used in the situation where the battery is fully charged (and is unable to further absorb power from the grid) and the frequency of the grid increases above the dead band so that power has to be absorbed for balancing purposes.
The BESS operation is the following:
If historic frequency data (measurements) are available, the analysis of the BESS behaviour can be reconstituted and an operating strategy that minimizes the operating cost can be derived.
The results of analysis are used to dimension the BESS capacity for a supplied balancing reserve power (use in the design and planning phase). The minimum capacity allows minimizing the installation and maintenance cost of the BESS. This minimization is achieved by using a novel BESS operating strategy that also uses the analysis of the same historic frequency data and further data gathered during the operation of the BESS.
This invention relates generally to the operating strategy of the BESS and more specifically, concerns a method, which is capable not only to provide a balancing reserve but also to minimize the operating cost of the BESS based on the analysis of historic frequency data.
More specifically the invention provides an operation algorithm of a BESS for providing a balancing reserve. The target of this algorithm is to maintain the state of charge of the BESS above a minimum and below a maximum and to achieve this target at a minimum operating cost.
The operating cost is influenced by the following parameters: - The rate of charge during periods when the BESS has to be recharged after a sequence of discharge events.
- The price for charging, which depends (in addition to the rate of charge) on the time period of charging (base load periods or peak load periods). - The amount of energy dissipated in the resistors.
- The amount of revenues generated from selling electricity in the market when the BESS is in a high state of charge.
In order to be capable to absorb or supply power in the case of large frequency deviations (e.g. trip of a large power unit) the BESS has to have sufficient margin in both (charge and discharge) directions, i.e. it needs to be only partially charged.
Fig. 1 shows a simplified schematic diagram of a BESS in accordance with an embodiment of the invention. The battery energy storage system or BESS 10 of Fig. 1 comprises a battery 11 , which may consist of a plurality of battery strings 11a-d, each battery string 11a-d comprising a plurality of individual battery cells. To allow a flexible operation of the battery 11 , the battery strings 11a-d can be switched on and off within the system by means of suitable switches 17. The battery 11 is connected to the DC side of a converter 14, which converts DC current to AC current (during a discharge of the battery 11), and vice versa (when the battery 11 is charged). The converter 14 contains bridges of power semiconductor elements, like GTOs or IGCTs. The AC side of the converter 14 is connected to the grid 16 to be balanced by means of a converter transformer 15. To reduce or suppress ripple a dc filter circuit 12 is provided at the DC side of the converter. Furthermore, the battery 11 may be connected to an energy-dissipating resistor 13 (or a plurality of resistors) by means of separate switches 18.
The battery energy storage system 10 of Fig. 1 is part of a control scheme, which is shown in Fig. 2. The grid 16 is monitored by means of a grid-monitoring device 21 , which is connected to an input of a central control unit 20 via an input line 28. A second input (and output) line 27 connects data storage 19 to another input of the control unit 20. The data storage 19 is used to store historical frequency data of the grid or data derived from these frequency data. The data stored in the data storage 19 are used to optimize the operation of the BESS with regard to charge and discharge events, which can be expected based on the historical behaviour of the grid 16. The data in data storage 19 shall be constantly updated during operation (taking into account new measurements) by transferring data from the control unit 20 to data storage 19 via line 27.
Another input of the control unit receives signals from a SoC monitoring device 29, which monitors the actual state-of-charge SoC of the battery 11. The battery 11 , which is shown as a container in Fig. 2, has a maximum state-of-charge SoCmaχ, which is equivalent to the volume of the container. For the operation scheme according to the invention, two state-of-charge setpoints SoC1 and SoC2 are introduced to determine an area, within which the state-of-charge SoC shall be kept during operation. Although the setpoints SoC1 and SoC2 will be set within the control unit 20, external control lines 23, 24 have been drawn from the control unit 20 to the battery 11 in Fig. 2 to visualize the process. Further control lines 25 and 26 run from the control unit 20 to the converter 14 and resistor 13. They are used to control the dissipation process within the resistor 13 and the charge or discharge as well as the rate of charge and discharge of the battery 11 via the converter 14.
When the two setpoints SoC1 , SoC2 for the State of Charge SoC are defined, the actual SoC is kept between these two setpoints (Figs. 2 and 3).
According to the present BESS operating strategy, that minimizes the operating cost while supplying balancing reserve, the following operating steps are involved: • The state of charge (SoC) of the BESS is essentially kept above a first (minimum) SoC setpoint SoC1 and below a second (maximum) SoC setpoint SoC2. • This is achieved by o (i) charging the battery 11 , preferably at a modest rate (0.1-10% of nominal power), if the SoC is below the minimum setpoint SoC1 , o (ii) selling electricity, preferably on the spot or intra-day market, if the
SoC is above the maximum setpoint SoC2, and o (iii) dissipating energy, especially in resistors 13, if the battery 11 is fully charged (SoCmax in Fig. 2). • The maximum and minimum SoC setpoints SoC1 , SoC2 can be dynamically adjusted.
• A dynamic adjustment of the minimum and maximum state of charge setpoints SoC1 and SoC2 may be based on the results of historic frequency data analysis of the grid 16 and may depend on the current state of the power system or grid. For example, the maximum SoC setpoint SoC2 can be decreased during a transition from one hour to another in the morning of working day, etc.
• There are several short and long term frequency variations which may influence a computation of SoC setpoints SoC1 , SoC2 for the BESS: o Hourly (variation of generation/consumption schedules) o Daily (day and night differences in system inertia) o Weekly (working days and weekends difference in system inertia) o Yearly (winter and summer difference in system inertia)
• Calculation of the excess amount of energy when the actual SoC exceeds the maximum setpoint SoC2, and sending a signal to the market operator to sell energy.
• Calculation of the deficit amount of energy when the actual SoC depreciates the minimum setpoint SoC1.
• More generally, the rate of charge of the BESS can be any discrete or continuous function of both the current SoC of the BESS and the historic frequency data.
• More specifically the minimum SoC setpoint SoC1 is a first predetermined percentage of total BESS capacity SoCmax and the maximum SoC setpoint SoC2 is a second predetermined percentage of total BESS capacity SoCmax exceeding the first predeterminded percentage. An actual example of the operation strategy according to the invention is shown in Fig. 3. The upper part of Fig. 3 shows the power of the battery P versus time t. The power of the battery P being positive, when the power flows into the battery, and being negative, when the power is discharged from the battery. The lower part of Fig. 3 shows the actual state-of-charge SoC of the battery versus time t, which determines in its relation to the two setpoints SoC1 and SoC2, how the energy flow to and from the battery is controlled. At h5.00, the battery absorbs energy (A), thereby increasing the SoC beyond the upper setpoint SoC2. When the SoC reaches its maximum (100% charged) at around h5.25, the resistor is switched on and energy is dissipated by means of the resistor (B, dashed line). From hθ.OO on, the battery is discharged and energy is sold (C), thereby decreasing the SoC below the upper setpoint SoC2 to be just above setpoint SoC1 at h7.00 (in this example not only the discharge (at C) but also the balancing power is additionally discharged into the grid due to the low system frequency between 6.05h and 6.4Oh). After having supplied the grid with energy at around h7.15 (D), the SoC falls below the lower setpoint SoC1 and energy has to be bought between h7.25 and hδ.00 (E) for the SoC to enter again the SoC band between the two setpoints SoC1 and SoC2.
LIST OF REFERENCE NUMERALS
10 battery energy storage system (BESS)
11 battery
11a-d battery string
12 dc filter circuit
13 energy dissipating resistor
14 converter
15 transformer
16 grid
17,18 switch
19 data storage
20 control unit
21 grid monitoring device
22,27,28 input line
23,..,26 control line
29 SoC monitoring device f frequency
FD frequency dead band
Pin charging power (BESS)
Pout discharging power (BESS)
SoC state-of-charge (of the battery)
SoC1,2 state-of-charge setpoint oOCmax maximum state-of-charge

Claims

1. Method of operating a battery energy storage system (10) provided for frequency regulation of a grid (16), said battery energy storage system (10) comprising a battery (11 ; 11a-d) capable of being charged to a maximum state-of charge (SoCmax), which battery (11 ; 11 a-d) is connected to the grid (16) for controllably discharging energy into the grid (16) or being charged from the grid (16), characterized in that said method comprises the following steps: - predetermining a first lower setpoint (SoC1 ) for the state-of-charge (SoC) of the battery (11 ; 11a-d);
- predetermining a second upper setpoint (SoC2) below said maximum state- of charge (SoCmax) for the state-of-charge (SoC) of the battery (11 ; 11 a-d);
- essentially keeping the state-of-charge (SoC) of the battery (11 ; 11 a-d) above said first SoC setpoint (SoC1 ) and below said second SoC setpoint
(SoC2); whereby
- the state-of-charge (SoC) of the battery (11; 11 a-d) is monitored;
- the battery (11 ; 11 a-d) is charged from the grid (16), if the state-of-charge (SoC) is below the first setpoint (SoC1 ); - electric energy is discharged from the battery (11 ; 11 a-d) into the grid (16), if the state-of-charge (SoC) is above the upper setpoint (SoC2).
2. Method according to claim 1 , characterized in that the electric energy is dissipated in energy dissipating means, preferably a resistor (13), if the battery (11 ; 11 a-d) is fully charged.
3. Method according to claim 1 or 2, characterized in that the battery (11 ; 11a-d) is charged at a rate of 0.1-10% of a nominal power of the battery, if the state-of-charge (SoC) is below the first setpoint (SoC1).
4. Method according to claim 1 or 2, characterized in that the predetermined first and/or second setpoints (SoC1 , SoC2) are dynamically adjusted during the operation of the battery energy storage system (10).
5. Method according to claim 4, characterized in that the predetermined first and/or second setpoints (SoC1 , SoC2) are dynamically adjusted based on historic frequency data of the grid (16).
6. Method according to claim 4 or 5, characterized in that the predetermined first and/or second setpoints (SoC1 , SoC2) are dynamically adjusted based on the current state of the power system or grid (16), respectively.
7. Method according to claim 1 or 2, characterized in that the first setpoint (SoC1 ) and/or the second setpoint (SoC2) are predetermined to be a percentage of the maximum state-of-charge (SoCmax) of the battery (11 ; 11 a-d).
8. Method according to claim 1 or 2, characterized in that the battery (11 ; 11a-d) is charged at a rate-of-charge, which is a function of the current state-of- charge (SoC) and/or historic frequency data of the grid (16).
9. Battery energy storage system (10) for conducting the method according to claim 1 , comprising a battery (11 ; 11a-d), which is connectable to a grid (16) by means of a converter (14) and transformer (15), and a control unit (20) for controlling the converter (14) to either charge the battery (11; 11a-d) with electric energy from the grid (16), or discharge electric energy from the battery (11 ; 11 a-d) into the grid (16), an input of said control unit (20) being connectable to a grid monitoring device (21), characterized in that monitoring means (29) are provided for monitoring the actual state-of-charge (SoC) of the battery (11 ; 11a-d), and the control unit (20) is equipped to compare the actual state-of-charge (SoC) with a predetermined first lower setpoint (SoC1 ) for the state-of-charge (SoC) of the battery (11 ; 11a-d) and a predetermined second upper setpoint (SoC2) for the state-of-charge (SoC) of the battery (11 ; 11a-d).
10. Battery energy storage system according to claim 9, characterized in that controllable energy dissipating means (13) are connected to the battery (11; 11a-d), and that said energy dissipating means (13) are controlled by said control unit (20).
11. Battery energy storage system according to claim 9, characterized in that a data storage (19) is connected to said control unit (20) for storing data related to the historical variation with time of the frequency (f) of the grid (16) and/or historical variations of operation parameters (actual SoC, SoC1 , SoC2) of the battery storage system (10).
PCT/CH2006/000157 2006-03-16 2006-03-16 Method for operating a battery energy storage system (bess) and battery energy storage system WO2007104167A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CH2006/000157 WO2007104167A1 (en) 2006-03-16 2006-03-16 Method for operating a battery energy storage system (bess) and battery energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2006/000157 WO2007104167A1 (en) 2006-03-16 2006-03-16 Method for operating a battery energy storage system (bess) and battery energy storage system

Publications (1)

Publication Number Publication Date
WO2007104167A1 true WO2007104167A1 (en) 2007-09-20

Family

ID=37198843

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2006/000157 WO2007104167A1 (en) 2006-03-16 2006-03-16 Method for operating a battery energy storage system (bess) and battery energy storage system

Country Status (1)

Country Link
WO (1) WO2007104167A1 (en)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009068112A1 (en) * 2007-11-30 2009-06-04 Telecom Italia S.P.A. Electricity supply apparatus of an industrial site
NL2001347C2 (en) * 2008-03-04 2009-09-07 Teamwork Engineering B V Direct coupling device for low voltage electrical power distribution in e.g. car, has battery for storing electric energy, and inverter for controlling energy flow between distribution and storage resources
EP2139090A1 (en) 2008-06-24 2009-12-30 ABB Research Ltd. Method for operating a battery energy storage system
WO2010042190A2 (en) 2008-10-09 2010-04-15 The Aes Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
EP2190097A1 (en) 2008-11-25 2010-05-26 ABB Research Ltd. Method for operating an energy storage system
CN101834449A (en) * 2009-02-26 2010-09-15 通用电气公司 Improve the system and method for power grid stability
WO2010124546A1 (en) * 2009-04-30 2010-11-04 Byd Company Limited Battery-based power station
WO2010135937A1 (en) 2009-05-27 2010-12-02 Byd Company Limited Energy storage system for balancing load of power grid
WO2011127047A2 (en) 2010-04-06 2011-10-13 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
EP2393150A1 (en) 2010-06-01 2011-12-07 Battery Consult Sagl High temperature rechargeable electrochemical energy storage cell
WO2011159891A2 (en) * 2010-06-16 2011-12-22 Toyota Motor Engineering & Manufacturing North America, Inc. System and method for optimizing use of a battery
WO2011112255A3 (en) * 2010-03-11 2012-01-05 The Aes Corporation Regulation of contribution of secondary energy sources to power grid
CN102624015A (en) * 2012-01-12 2012-08-01 清华大学 Control device for interchanging electric energy of electric vehicle and electric energy of residence
WO2012067944A3 (en) * 2010-11-17 2013-05-02 Battelle Memorial Institute Controller for hybrid energy storage
WO2013068256A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power with an energy store using tolerances in determining the frequency deviation
WO2013068258A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power for a power network
WO2013068267A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power, taking into account a variable target frequency
WO2013068263A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Verfahren zur bereitstellung von regelleistung mit einem energiespeicher unter ausnutzung von toleranzen bei der leistungserbringung
WO2013068264A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power using an energy store having variable deadband width when providing the control power
WO2013041443A3 (en) * 2011-09-21 2013-10-31 Ge Energy Power Conversion Technology Ltd Methods of controlling a combined plant including at least one generator and an energy store
WO2013068233A3 (en) * 2011-11-10 2013-11-07 Evonik Industries Ag Method for providing reserve power for stabilizing an alternating current network
WO2013068254A3 (en) * 2011-11-10 2013-11-07 Evonik Industries Ag Method for providing control power with an energy store using tolerances at the time of providing the control power
WO2014000971A1 (en) * 2012-06-26 2014-01-03 Siemens Aktiengesellschaft Method for the operation of a power supply system comprising a power storage device
WO2014019605A1 (en) * 2012-07-31 2014-02-06 Siemens Aktiengesellschaft Facility for controlling charge current for storage units in electrical energy supply grids connecting distributed generators and distributed storage units, among others
WO2014095343A2 (en) * 2012-12-21 2014-06-26 Evonik Industries Ag Method for operating an energy accumulator
DE102013005974A1 (en) 2013-04-09 2014-10-09 Florian Ilmberger Battery storage system and method for operating a battery storage system
WO2014177175A1 (en) * 2013-04-29 2014-11-06 Caterva Gmbh Power system for providing a grid service to a power grid
WO2014187487A1 (en) * 2013-05-23 2014-11-27 Caterva Gmbh A system for providing a primary control power for a power grid
WO2014198292A1 (en) * 2013-06-11 2014-12-18 Caterva Gmbh A method and system for charging an energy storage device
US20160359364A1 (en) * 2015-06-04 2016-12-08 Nec Energy Solutions, Inc. Utilizing a load for optimizing energy storage size and operation in power systems regulation applications
WO2016193308A1 (en) * 2015-06-03 2016-12-08 sonnen GmbH Remote battery management system, management device, and remote battery management method
EP3148036A1 (en) * 2015-09-28 2017-03-29 AEG Power Solutions GmbH Assembly for storing electrical energy
EP2637277A4 (en) * 2010-11-02 2017-08-09 Panasonic Intellectual Property Management Co., Ltd. Control apparatus
EP3297115A1 (en) * 2016-09-20 2018-03-21 AEG Power Solutions GmbH Assembly with an energy storage device and energy converter for absorbing electrical energy from a power network and discharge of electrical energy to the power network
CN107979100A (en) * 2017-12-08 2018-05-01 东南大学 Power-type energy storage frequency regulating duty division methods based on quadratic programming
CN110783935A (en) * 2019-11-13 2020-02-11 国网江苏省电力有限公司扬州供电分公司 Method for limiting battery energy storage response frequency modulation signal under charge state
FR3089711A1 (en) 2018-12-05 2020-06-12 Nw Joules Balancing equipment for a high voltage MV electrical transmission network
EP3742571A1 (en) * 2019-05-20 2020-11-25 Siemens Gamesa Renewable Energy A/S Method and arrangement for controlling an energy storage device
DE102014223284B4 (en) 2013-11-15 2022-03-24 Honda Motor Co., Ltd. VEHICLE-TO-NETWORK REGULATION/CONTROL
SE2230093A1 (en) * 2022-03-28 2023-09-29 Per Nilsson Patent for Synthetic Inertia

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57156674A (en) * 1981-03-20 1982-09-28 Toshiba Corp Controller for electric power generation by battery

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57156674A (en) * 1981-03-20 1982-09-28 Toshiba Corp Controller for electric power generation by battery

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
LEE T-Y ET AL: "DETERMINATION OF OPTIMAL CONTRACT CAPACITIES AND OPTIMAL SIZES OF BATTERY ENERGY STORAGE SYSTEMS FOR TIME-OF-USE RATES INDUSTRIAL CUSTOMERS", IEEE TRANSACTIONS ON ENERGY CONVERSION, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 10, no. 3, 1 September 1995 (1995-09-01), pages 562 - 568, XP000539238, ISSN: 0885-8969 *
LEE T-Y ET AL: "Effect of the battery energy storage system on the time-of-use rates industrial customers", IEE PROCEEDINGS: GENERATION, TRANSMISSION AND DISTRIBUTION, INSTITUTION OF ELECTRICAL ENGINEERS, GB, vol. 141, no. 5, 5 September 1994 (1994-09-05), pages 521 - 8, XP006001870, ISSN: 1350-2360 *
MALY D K ET AL: "Optimal battery energy storage system (BESS) charge scheduling with dynamic programming", IEE PROCEEDINGS: SCIENCE, MEASUREMENT AND TECHNOLOGY, IEE, STEVENAGE, HERTS, GB, vol. 142, no. 6, 1 November 1995 (1995-11-01), pages 453 - 8, XP006004445, ISSN: 1350-2344 *
PACIURA K ET AL: "A battery energy storage system for the Hygen electricity generator and power supply system", AFRICON, 1999 IEEE CAPE TOWN, SOUTH AFRICA 28 SEPT.-1 OCT. 1999, PISCATAWAY, NJ, USA,IEEE, US, vol. 2, 28 September 1999 (1999-09-28), pages 949 - 954, XP010367350, ISBN: 0-7803-5546-6 *

Cited By (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8624558B2 (en) 2007-11-30 2014-01-07 Telecom Italia S.P.A. Electricity supply apparatus of an industrial site
WO2009068112A1 (en) * 2007-11-30 2009-06-04 Telecom Italia S.P.A. Electricity supply apparatus of an industrial site
NL2001347C2 (en) * 2008-03-04 2009-09-07 Teamwork Engineering B V Direct coupling device for low voltage electrical power distribution in e.g. car, has battery for storing electric energy, and inverter for controlling energy flow between distribution and storage resources
EP2139090A1 (en) 2008-06-24 2009-12-30 ABB Research Ltd. Method for operating a battery energy storage system
WO2009156261A2 (en) * 2008-06-24 2009-12-30 Abb Research Ltd Method for operating a battery energy storage system
WO2009156261A3 (en) * 2008-06-24 2010-05-14 Abb Research Ltd Method for operating a battery energy storage system
EP2351189A2 (en) * 2008-10-09 2011-08-03 The AES Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
WO2010042190A3 (en) * 2008-10-09 2010-07-22 The Aes Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
RU2492566C2 (en) * 2008-10-09 2013-09-10 Дзе Аэс Корпорейшн Frequency-reactive control of charge maintenance of electricity accumulation systems for ancillary services in electric power network
US7839027B2 (en) 2008-10-09 2010-11-23 The Aes Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
CN102326315A (en) * 2008-10-09 2012-01-18 Aes有限公司 The frequency response electric charge that is used for the power storage system of the assistant service on the electrical network is kept control
WO2010042190A2 (en) 2008-10-09 2010-04-15 The Aes Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
EP2351189A4 (en) * 2008-10-09 2012-04-04 Aes Corp Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
US8493030B2 (en) 2008-11-25 2013-07-23 Abb Research Ltd Method for operating an energy storage system
EP2190097A1 (en) 2008-11-25 2010-05-26 ABB Research Ltd. Method for operating an energy storage system
CN101834449A (en) * 2009-02-26 2010-09-15 通用电气公司 Improve the system and method for power grid stability
WO2010124546A1 (en) * 2009-04-30 2010-11-04 Byd Company Limited Battery-based power station
WO2010135937A1 (en) 2009-05-27 2010-12-02 Byd Company Limited Energy storage system for balancing load of power grid
EP2436093A4 (en) * 2009-05-27 2013-07-03 Byd Co Ltd Energy storage system for balancing load of power grid
EP2436093A1 (en) * 2009-05-27 2012-04-04 BYD Company Limited Energy storage system for balancing load of power grid
CN103081290A (en) * 2010-03-11 2013-05-01 爱依斯公司 Regulation of contribution of secondary energy sources to power grid
EP2545632A4 (en) * 2010-03-11 2013-12-18 Aes Corp Regulation of contribution of secondary energy sources to power grid
WO2011112255A3 (en) * 2010-03-11 2012-01-05 The Aes Corporation Regulation of contribution of secondary energy sources to power grid
US8914158B2 (en) 2010-03-11 2014-12-16 Aes Corporation, The Regulation of contribution of secondary energy sources to power grid
EP2545632A2 (en) * 2010-03-11 2013-01-16 The AES Corporation Regulation of contribution of secondary energy sources to power grid
CN103081290B (en) * 2010-03-11 2017-03-01 爱依斯公司 The regulation of the contribution to electrical network for the secondary energy
RU2565235C2 (en) * 2010-03-11 2015-10-20 Те Аес Корпорейшн Regulating contribution of secondary power supply sources to distribution network
US8700225B2 (en) 2010-04-06 2014-04-15 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
EP2556578A4 (en) * 2010-04-06 2016-03-02 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
CN102934319A (en) * 2010-04-06 2013-02-13 巴特尔纪念研究院 Grid regulation services for energy storage devices based on grid frequency
CN102934319B (en) * 2010-04-06 2015-09-16 巴特尔纪念研究院 For regulating system and the control method of energy storage device and electric power distribution system
US9753440B2 (en) 2010-04-06 2017-09-05 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
WO2011127047A2 (en) 2010-04-06 2011-10-13 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
US8478452B2 (en) 2010-04-06 2013-07-02 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
WO2011127047A3 (en) * 2010-04-06 2012-02-16 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
US10663932B2 (en) 2010-04-06 2020-05-26 Battelle Memorial Institute Grid regulation services for energy storage devices based on grid frequency
EP2393150A1 (en) 2010-06-01 2011-12-07 Battery Consult Sagl High temperature rechargeable electrochemical energy storage cell
WO2011150528A1 (en) 2010-06-01 2011-12-08 Battery Consult Sagl High temperature rechargeable electrochemical energy storage cell
WO2011159891A3 (en) * 2010-06-16 2012-04-26 Toyota Motor Engineering & Manufacturing North America, Inc. System and method for optimizing use of a battery
WO2011159891A2 (en) * 2010-06-16 2011-12-22 Toyota Motor Engineering & Manufacturing North America, Inc. System and method for optimizing use of a battery
US8359132B2 (en) 2010-06-16 2013-01-22 Toyota Motor Engineering & Manufacturing North America, Inc. System and method for optimizing use of a battery
EP2637277A4 (en) * 2010-11-02 2017-08-09 Panasonic Intellectual Property Management Co., Ltd. Control apparatus
WO2012067944A3 (en) * 2010-11-17 2013-05-02 Battelle Memorial Institute Controller for hybrid energy storage
US8754547B2 (en) 2010-11-17 2014-06-17 Battelle Memorial Institute Controller for hybrid energy storage
CN103907259A (en) * 2011-09-21 2014-07-02 通用电气能源能量变换技术有限公司 Methods of controlling a combined plant including at least one generator and an energy store
EP2573896B1 (en) 2011-09-21 2017-03-01 GE Energy Power Conversion Technology Ltd Methods of controlling a combined plant including at least one generator and an energy store
WO2013041443A3 (en) * 2011-09-21 2013-10-31 Ge Energy Power Conversion Technology Ltd Methods of controlling a combined plant including at least one generator and an energy store
US10298015B2 (en) 2011-09-21 2019-05-21 Ge Energy Power Conversion Technology Ltd. Methods of controlling a combined plant including at least one generator and an energy store
EP2777125B1 (en) 2011-11-10 2018-07-04 Evonik Degussa GmbH Method for providing control power using an energy store having variable deadband width when providing the control power
WO2013068256A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power with an energy store using tolerances in determining the frequency deviation
WO2013068254A3 (en) * 2011-11-10 2013-11-07 Evonik Industries Ag Method for providing control power with an energy store using tolerances at the time of providing the control power
WO2013068233A3 (en) * 2011-11-10 2013-11-07 Evonik Industries Ag Method for providing reserve power for stabilizing an alternating current network
US9667071B2 (en) 2011-11-10 2017-05-30 Evonik Degussa Gmbh Method for providing control power by an energy store by using tolerances in the determination of the frequency deviation
WO2013068263A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Verfahren zur bereitstellung von regelleistung mit einem energiespeicher unter ausnutzung von toleranzen bei der leistungserbringung
WO2013068267A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power, taking into account a variable target frequency
US9966762B2 (en) 2011-11-10 2018-05-08 Evonik Degussa Gmbh Method for providing control power by an energy store by using tolerances in the delivery of power
WO2013068264A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power using an energy store having variable deadband width when providing the control power
US9748775B2 (en) 2011-11-10 2017-08-29 Evonik Degussa Gmbh Method for providing control power using an energy store having variable deadband width when providing the control power
WO2013068258A1 (en) * 2011-11-10 2013-05-16 Evonik Industries Ag Method for providing control power for a power network
CN102624015A (en) * 2012-01-12 2012-08-01 清华大学 Control device for interchanging electric energy of electric vehicle and electric energy of residence
WO2014000971A1 (en) * 2012-06-26 2014-01-03 Siemens Aktiengesellschaft Method for the operation of a power supply system comprising a power storage device
US9768634B2 (en) 2012-07-31 2017-09-19 Caterva Gmbh Facility for controlling charge current for storage units in electrical energy supply grids connecting distributed generators and distributed storage units, among others
WO2014019605A1 (en) * 2012-07-31 2014-02-06 Siemens Aktiengesellschaft Facility for controlling charge current for storage units in electrical energy supply grids connecting distributed generators and distributed storage units, among others
WO2014095343A2 (en) * 2012-12-21 2014-06-26 Evonik Industries Ag Method for operating an energy accumulator
WO2014095343A3 (en) * 2012-12-21 2014-12-04 Evonik Industries Ag Method for operating electric energy accumulators
DE102013005974A1 (en) 2013-04-09 2014-10-09 Florian Ilmberger Battery storage system and method for operating a battery storage system
DE102013005974B8 (en) * 2013-04-09 2015-03-12 Florian Ilmberger Battery storage system and method for operating a battery storage system
DE102013005974B4 (en) * 2013-04-09 2015-01-08 Florian Ilmberger Battery storage system and method for operating a battery storage system
EP2790290A2 (en) 2013-04-09 2014-10-15 Florian Ilmberger Battery storage installation and method for operating a battery storage installation
WO2014177175A1 (en) * 2013-04-29 2014-11-06 Caterva Gmbh Power system for providing a grid service to a power grid
US9899839B2 (en) 2013-04-29 2018-02-20 Caterva Gmbh Power system for providing a grid service to a power grid
WO2014187487A1 (en) * 2013-05-23 2014-11-27 Caterva Gmbh A system for providing a primary control power for a power grid
US10074986B2 (en) 2013-05-23 2018-09-11 Caterva Gmbh System for providing a primary control power for a power grid
WO2014198292A1 (en) * 2013-06-11 2014-12-18 Caterva Gmbh A method and system for charging an energy storage device
US10404076B2 (en) 2013-06-11 2019-09-03 Alelion Energy Systems Ab Method and system for charging an energy storage device
DE102014223284B4 (en) 2013-11-15 2022-03-24 Honda Motor Co., Ltd. VEHICLE-TO-NETWORK REGULATION/CONTROL
WO2016193308A1 (en) * 2015-06-03 2016-12-08 sonnen GmbH Remote battery management system, management device, and remote battery management method
US10516547B2 (en) 2015-06-03 2019-12-24 sonnen GmbH Remote battery management system, management device, and remote battery management method
US10116460B2 (en) 2015-06-03 2018-10-30 sonnen GmbH Remote battery management system, management device, and remote battery management method
WO2016196968A1 (en) * 2015-06-04 2016-12-08 Nec Energy Solutions, Inc. Utilizing a load for optimizing energy storage size and operation in power systems regulation applications
US20160359364A1 (en) * 2015-06-04 2016-12-08 Nec Energy Solutions, Inc. Utilizing a load for optimizing energy storage size and operation in power systems regulation applications
EP3148036A1 (en) * 2015-09-28 2017-03-29 AEG Power Solutions GmbH Assembly for storing electrical energy
US10326274B2 (en) 2016-09-20 2019-06-18 Aeg Power Solutions Gmbh Arrangement comprising an energy storage device for receiving electrical energy from an electrical network and discharing electrical energy to the electrical network
EP3297115A1 (en) * 2016-09-20 2018-03-21 AEG Power Solutions GmbH Assembly with an energy storage device and energy converter for absorbing electrical energy from a power network and discharge of electrical energy to the power network
CN107979100B (en) * 2017-12-08 2019-08-20 东南大学 Power-type energy storage frequency regulating duty division methods based on quadratic programming
CN107979100A (en) * 2017-12-08 2018-05-01 东南大学 Power-type energy storage frequency regulating duty division methods based on quadratic programming
FR3089711A1 (en) 2018-12-05 2020-06-12 Nw Joules Balancing equipment for a high voltage MV electrical transmission network
EP3742571A1 (en) * 2019-05-20 2020-11-25 Siemens Gamesa Renewable Energy A/S Method and arrangement for controlling an energy storage device
WO2020233915A1 (en) * 2019-05-20 2020-11-26 Siemens Gamesa Renewable Energy A/S Method and arrangement for controlling an energy storage device
CN110783935A (en) * 2019-11-13 2020-02-11 国网江苏省电力有限公司扬州供电分公司 Method for limiting battery energy storage response frequency modulation signal under charge state
SE2230093A1 (en) * 2022-03-28 2023-09-29 Per Nilsson Patent for Synthetic Inertia

Similar Documents

Publication Publication Date Title
WO2007104167A1 (en) Method for operating a battery energy storage system (bess) and battery energy storage system
AU2020204639B2 (en) Grid network gateway aggregation
EP3469685B1 (en) Method and apparatus for controlling power flow in a hybrid power system
CN103337869B (en) A kind of method of novel battery energy-storage system and function integration design thereof
JP4445361B2 (en) Power system control method and power system control apparatus using secondary battery
US9431827B2 (en) Load isolation consumption management systems and methods
JP6978572B2 (en) Virtual power plant
JP2018107991A (en) Composite power generation system
CN102104250A (en) Renewable electricity generation system, electric power measurement device and method
US11139675B2 (en) Hybrid energy storage system
CN106655265A (en) Micro-grid energy management system for multiple energy sources
RU2568013C2 (en) Power generation system and method of its operation
KR20140084917A (en) System for managementing electric power
WO2003071656A1 (en) Power supply method and power supply system
JP6821905B2 (en) Power system
KR20200005862A (en) Energy management system and energy storage system having the energy management system
JP5951747B2 (en) Power system controller
JP5600066B2 (en) Control method of sodium-sulfur battery
KR102335059B1 (en) Battery management system and method for variable capacity dividing of battery pack using thereof
CA3116819C (en) Feed-in method of a wind power system, and wind power system
CN108879676B (en) Electricity selling control system
KR101901780B1 (en) Non-interrupting power supply and AMI for Microgrid System using the same
KR101299269B1 (en) Battery Energy Storage System
Xiong et al. Power management of a residential hybrid photovoltaic inverter with battery energy storage system
JP7408108B2 (en) power supply system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 06705397

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06705397

Country of ref document: EP

Kind code of ref document: A1