EP3695478A1

EP3695478A1 - Multiple use of energy stores

Info

Publication number: EP3695478A1
Application number: EP18780059.4A
Authority: EP
Inventors: Stefan Nykamp; Tobias Rott
Original assignee: Westnetz GmbH
Current assignee: Westnetz GmbH
Priority date: 2017-10-09
Filing date: 2018-09-25
Publication date: 2020-08-19
Also published as: WO2019072541A1; DE102017123374A1

Abstract

The invention relates in particular to a method carried out by one or more devices, which method comprises: acquisition of historic load flow and/or voltage information indicative of a historic loading situation in the power network; acquisition of weather information indicative of at least one environmental attribute influencing power generation by a power generation plant, wherein the weather information comprises at least one historic and/or forecast environmental attribute; determination of forecast load flow and/or voltage information indicative of a forecast loading situation in the power network, wherein the forecast load flow and/or voltage information is determined on the basis of the acquired historic load flow and/or voltage information and the acquired weather information; determination of output and/or capacity information indicative of an operating mode of an energy store, wherein the output and/or capacity information is determined on the basis of the determined forecast load flow and/or voltage information; determination of flexibility information indicative of a free capacity of the energy store which can be used to store energy in addition to the quantity of energy which is already stored in the energy store or can be used to remove energy from the store into the power network, wherein the flexibility information is determined on the basis of the determined output and/or capacity information and total capacity information indicative of the available capacity of the energy store; and output or initiation of the output of the determined flexibility information. The invention further relates to a device and to a system for carrying out the method according to the invention.

Description

Multiple use of energy storage

Field of the invention

The invention relates to methods and devices with which an energy storage in a power grid, for example, for handling load and / or

Inlet tips of the power grid can be used.

Background of the invention

Renewable energy sources, such as photovoltaic and / or wind energy systems, increasingly feed the electrical energy they generate into the power grid. This sometimes presents the power grid with great challenges.

Renewable energy sources do not generate electricity - in contrast to conventional power plants - in a constant manner, but rather as a function of the environmental influences used for generating it, such as the sun or the wind.

The background to the occurrence of load and / or infeed peaks caused by photovoltaic and / or wind energy installations is that, for example, the sun shines strongly during the day, and / or a strong wind blows for a short time, so that the photovoltaic and / or or wind turbines generate a corresponding amount of electrical energy and feed it into the power grid.

In addition, in these cases, even a small power requirement of consumers of the power grid added, the power grid can be correspondingly quickly at its limit. The renewable energy sources, in particular photovoltaic and / or

Wind turbines, sometimes cause load and / or Einspeisespitzen or power peaks. When the load and / or feed peaks occur, the grid will be close to its limit or even run above its limit. Load and / or infeed peaks or power peaks must be handled in order to ensure the supply of consumers and the transport of energy via the power grid.

So there is a danger that a supply interruption of the

Power supplied consumers can occur. Although load and / or feed tips sometimes occur only briefly, the stability of the power network can only be ensured if the power grid is also designed for these load and / or feed tips and can handle them.

A known from the prior art solution for handling such load and / or feeding tips is that energy storage can be used. These energy storage devices can caching or smoothing generated electrical energy, and correspondingly reduce or smooth load and / or injection peak load and / or injection peaks caused by the photovoltaic and / or wind energy systems, so that the generated electrical energy from the photovoltaic and / or

Wind turbines do not endanger the stability of the power grid.

General description of some exemplary embodiments of the invention

Feeding tips sometimes occur only relatively rarely and the energy storage could be used in other times for other applications.

Against the background of the prior art presented, it is thus the task of at least partially reducing or avoiding the problems described, that is to provide in particular a possibility to power storage connected to the power network, in particular for handling load and / or supply peaks of the power grid to be able to use and also this

Energy storage in the remaining times to use for other applications. This object is achieved objectively by a method having the features of claim 1.

According to a first aspect of the invention, a method is described, performed by one or more devices, comprising the method:

Recording historical load flow and / or voltage information indicative of a historical load situation in the power grid;

Detecting weather information indicative of at least one

Electricity generation from a power plant influencing

Environmental attribute, wherein the weather information includes at least one historical and / or predicted environmental attribute;

Determining a predicted load flow and / or voltage information indicative of a predicted load situation in the power grid, wherein the predicted load flow and / or voltage information is determined based on the sensed historical load flow and / or voltage information and the acquired weather information;

Determining power and / or capacity information indicative of operation of an energy store, wherein the power and / or

Capacity information based on the predicted forecast

Load flow and / or voltage information is determined;

Determining a flexibility information indicative of a free capacity of the energy storage, which is used for storing energy in addition to the amount of energy that is already stored in the energy storage, or is useful for the withdrawal of energy into the power grid, the flexibility information based on the determined power and / or capacity information and total capacity information indicative of the available capacity of the energy store; and

Issuing or causing the specific

Flexibility information. According to a second aspect of the invention, a device is described which is set up or comprises corresponding means for carrying out and / or controlling a method according to the first aspect. Devices of the

Method according to the first aspect are or include in particular one or more devices according to the second aspect.

According to the second aspect of the invention, an alternative device is described, comprising at least one processor and at least one memory with computer program code, wherein the at least one memory and the

Computer program code are configured to execute and / or control at least one method according to the first aspect with the at least one processor. By a processor is intended, for example, a control unit, a microprocessor, a microcontroller such as a microcontroller, a digital signal processor (DSP), an application specific integrated circuit (ASIC) or a Field

Programmable Gate Arrays (FPGA) are understood.

For example, an exemplary apparatus further includes means for storing information such as program memory and / or main memory. For example, an exemplary inventive device further includes means for receiving and / or transmitting information over a network, such as a network interface. For example, exemplary are inventive

Devices interconnected and / or connectable via one or more networks.

An example device according to the second aspect is or includes a computing device that is software and / or hardware configured to perform the respective steps of an example method according to the second aspect. Examples of a data processing system are a computer, a desktop computer, a server, a thin client and / or a portable one Computer (mobile device), such as a laptop computer, a tablet computer, a wearable, a personal digital assistant or a smartphone.

Individual method steps of the method according to the first aspect (for example, the detection of a historical load flow and / or voltage information and / or weather information) can in this case be carried out with a sensor device which also has at least one sensor element. Likewise, individual method steps (for example, determining a

Flexibility information), which for example not necessarily with the

Sensor device must be performed, be made by a further device, which is in particular via a communication system with the device, which has at least one sensor element, in communication.

Further devices can be provided, for example a server and / or for example a part or a component of a so-called computer cloud, which provides data processing resources dynamically for different users in a communication system. A computer cloud is understood in particular to mean a data processing infrastructure as defined by the National Institute for Standards and Technology (NIST) for the English term "cloud computing". An example of a computer cloud is a Microsoft Windows Azure Platform.

In accordance with the second aspect of the invention, a computer program is also described that includes program instructions that include a processor for

Execute execution and / or control of a method according to the first aspect, when the computer program is running on the processor. On

exemplary program according to the invention may be in or on one

computer-readable storage medium containing one or more programs. In accordance with the second aspect of the invention, a computer-readable computer is also disclosed

Storage medium containing a computer program according to the second aspect described. A computer-readable storage medium may e.g. as magnetic, electrical, electro-magnetic, optical and / or other

Storage medium may be formed. Such a computer-readable storage medium is preferably representational (ie "touchable"), for example it is as

Data carrier device formed. Such a data carrier device is for example portable or permanently installed in a device. Examples of such a data carrier device are volatile or non-volatile random access memory (RAM) such as e.g. NOR flash memory or with sequential access such as NAND flash memory and / or read only access (ROM) memory or read / write access. For example, computer readable shall be understood to mean that the storage medium can be read (and / or written) by a computer or a data processing system, for example by a computer

Processor.

According to a third aspect of the invention, a system is described, comprising a plurality of devices, in particular at least one control unit, a measuring device and an energy store, which together perform a method according to the first aspect.

An exemplary system according to the third aspect further comprises a server (eg, a network control center), e.g. To control peak load and / or feed peaks of a power grid, the server having a communication link (eg, a telecontrol connection) to the control unit. Optionally, the system includes a database included, for example, by the server or connected to the server.

In the following, exemplary features and exemplary embodiments are described in more detail in all aspects of the present subject matter: The power grid is for example a transmission network or a distribution network, with which electrical energy is distributed to one or more consumers. An example of such a distribution network is z. As a low-voltage power network, in which exist with the example, voltages of 400 V in the three-phase system.

In terms of the object, a power generation plant is an energy source, in particular a so-called renewable energy source.

For example, the power plant is a photovoltaic system,

Wind turbine, solar system, geothermal plant, or a combination thereof, to name a few non-limiting examples.

A photovoltaic system, also called PV system (or PVA for short), is one

Solar power plant, in which solar cells use part of the solar radiation in

electrical energy is converted. The thereby typical direct kind of

Energy conversion is called photovoltaic.

A wind turbine (also called a wind turbine) is one

Energy generation plant that converts kinetic energy generated by wind power, which is transmitted via rotor blades on a turbine, into electrical energy.

Such an energy store is in particular each decentralized energy store, which stores an energy by means of electrochemical or physical processes and provides an output voltage. Furthermore, they are especially among them

Energy storage to understand that contain one or more in series and possibly also in parallel capacitor, accumulator and / or battery cells or convert energy into another medium (eg power-to-heat, power-to-gas, to some only not to give limiting examples). Accumulator cells, in particular of the type Pb - lead acid battery, NiCd - nickel-cadmium rechargeable battery, NiH2 - nickel-hydrogen rechargeable battery, NiMH - nickel-metal hydride rechargeable battery, Li-Ion - lithium-ion rechargeable battery, LiPo - Lithium Polymer Battery, LiFe - Lithium Metal Battery, LiMn - Lithium Manganese Battery, LiFeP04 - Lithium Iron Phosphate Battery, LiTi - Lithium Titanate Battery, RAM - Rechargeable Alkaline Manganese, Ni-Fe - Nickel-Iron Battery, Na / NiCl - Sodium Nickel Chloride High Temperature Battery SCiB - Super Charge Ion Battery, Silver Zinc Battery, Silicone Battery, Vanadium Redox Battery, Zinc Air and / or Zinc Bromine Have battery. It is also possible to use double-layer capacitors or other types of capacitor as an energy store. The energy store can have one or more cells. Under the term energy storage is objectively a decentralized

Energy storage, such as a battery or a conversion technology into a storable medium (gas, heat) understood. Decentralized in the sense of

present subject matter energy storage, which may be located at one or more locations that are connected to the power grid, so z. B. are not centered in one place. For example, such are decentralized

Energy storage regularly arranged in the immediate vicinity of power plants, z. B. within a household in which, for example, a photovoltaic system is arranged on a roof. The at least one device for

Implementation of the subject method is, for example, also decentralized or locally arranged, z. B. also in the local vicinity of an above

listed power plant and / or an energy storage.

For example, according to the determined flexibility information, an amount of energy, e.g. B. is to be stored from the power grid in the energy storage, stored in a designed as a gas storage or heat storage energy storage by electrical energy of the power grid before

Storage is converted into the suitable for the energy storage medium. The same applies to a withdrawal of energy from the energy storage in the power grid. The historical load flow and / or voltage information represents

For example, current and / or voltage flows of the power grid, the one

Map the load situation in the power grid. The load situation forms z. B. from whether load and / or feed tips are present. For example, the historical load situation can reflect a historical load situation in the power grid, and the predicted load situation can be predicted, for example

Map the load situation in the power grid. The load flow information, for example, represents a load flow (eg, current and / or voltage) at one

Transformer (eg a local power transformer) over which the

Power generating plant and / or the energy storage generated electrical energy, for example, fed into the power grid.

The weather information is detected, for example, by a measuring device, which comprises of the at least one device or is electrically connected thereto. The measuring device is arranged, for example, locally in the power generation plant and / or the energy storage. Between the at least one

Device and the measuring device is for example a

Communication link, so that data and / or information can be transmitted between the two. The weather information represents, for example, weather conditions locally at the location of the power generation plant. For example, the weather information comprises an irradiation and / or intensity of solar radiation and / or wind directions and / or wind speeds, to name a few non-limiting examples. A predicted value for at least one environmental attribute is determined, for example, based on actual values in accordance with the acquired weather information. From this, for example, a forecast for a future expected amount of generated electrical energy can be derived from the power generation plant. In the event that the load flow and / or voltage information and / or the weather information is present as historical data, based on these For example, a regression analysis can be carried out in order to derive a forecast for the future, which is represented, for example, by the predicted value for at least one environmental attribute. The historical information is stored for example in a database.

Weather information, which is included, for example, from the detected weather information, may e.g. As a forecast of a possible occurrence of load and / or feed tips and thus, for example, accompanying

Voltage peaks in the distribution network provide, for example, in an intense sunlight a trained as a photovoltaic system

Power generation plant generates a lot of electrical energy, and / or at a high forecasted wind speed, which is captured by the

Weather information is included, designed as a wind turbine

Power generating plant generates a lot of wind-induced electrical energy.

For example, the case may arise that a power generation plant is not directly connected to an energy storage device for storing electrical energy, or that an energy store connected directly to the power generation plant is already fully charged. Then, another energy storage device having free capacity based on the determined flexibility information may provide that spare capacity for use. The use, i. z. As the storage of electrical energy in the energy storage, for example, by means of a correspondingly determined control information. You can

For example, voltage peaks or load and / or feeding tips can be effectively smoothed in the power grid.

The predicted load flow and / or voltage information comprises

For example, a measured and / or predicted amount of electrical energy that is determined based at least in part on the acquired weather information. Furthermore, the amount of electrical energy, for example, based on predefined parameters such. B. a maximum Generation power, size of the power plant (for example, in photovoltaic systems whose area) or the like, to name a few non-limiting examples are determined. For example, if it is detected based on the weather information, how long and how strong a wind is blowing at the location of the power plant that is designed as a wind turbine, for example, the amount of electrical energy that is generated, for example, can be determined accordingly.

Accordingly, depending on the application, the energy store may be operated, for example, in one or more of the following three modes, or the particular power and / or capacity information is indicative of one of the following modes of operation:

i) Netzdienlich, wherein the energy storage for the local power grid [z. B.

Transmission network or distribution network) is used;

ii) Systemdienlich, wherein the capacity of the energy storage, for example

used by an operator of the electricity network (eg

Transmission system operators or distribution system operators) to maintain the stability (and / or frequency) in the power grid, e.g. B. as a primary rule memory; and

(iii) Market - friendly, where an energy market (eg a so - called spot market on which hourly contracts are traded) represents the capacity of the

Energy storage can use.

Thus, it is possible to increase the utilization of free capacity of the

To increase energy storage, z. B. full use, d. H. higher utilization (eg operating hours) of the energy storage over the entire year to realize.

The determined flexibility information is indicative of a free capacity of the energy storage device which is usable for the storage and / or withdrawal of energy, in particular electrical energy, in addition to the amount of energy already stored in the energy storage. For example, the free capacity of the energy storage device for balancing load and / or feeding tips of the Electricity network can be used, with generated electrical energy to load and / or Einspeisespitzen in the power grid z. B. due to low demand, can be stored in the energy storage. Alternatively or additionally, the free capacity of the energy store can be used by an (energy) market, such as a service of primary control power, secondary control power, balancing power or the like being offered and implemented in such a market, or trading on an energy market with the salable power Amount of energy. For example, in the market, a demand for electrical energy is predicted and sold to consumers. This happens, for example, before the actual consumption of electrical energy. If the actual demand for energy deviates from the forecasted demand, the stability of the power grid may be jeopardized. Accordingly, an attempt is made to keep the predicted amount of electrical energy as accurately as possible. Otherwise, for example, power generators can be sanctioned. This results in another use case based on the determined

Flexibility information can be realized by, for example, free capacity of the energy storage is used for storing a over-generated compared to the forecast of the market too much amount of electrical energy. The determined flexibility information is output or its output is initiated. The output flexibility information is transmitted, for example, to a central facility of the power grid (eg, network control center), so that the capacity of the energy store, which is free in accordance with the flexibility information, e.g. B. according to the above, can be used. Furthermore, the

For example, flexibility information may be output to a data store storing the flexibility information, for example. On this data storage, for example, other facilities, such. B. access the network control center, so that, for example, the specific flexibility information for balancing or balancing the power grid can be used. For example, supplementing the particular information (e.g.

Flexibility information) with appropriate load and weather forecasts done in order to plan and realize an energy storage behavior for future situations.

In a further embodiment in all aspects, the method further comprises:

Detecting control information indicative of control of the

Energy storage, wherein the control information causes a storage and / or storage of electrical energy, wherein electrical energy is stored in the energy storage from the power grid or is stored by the energy storage in the power grid; and

Issuing or causing the specific

Control information to the energy storage. By means of the control information, a control of the

Energy storage can be done so that its capacity for storing energy (eg., From the power grid or storage of electrical energy generated by the power generation plant can be used in the energy storage.Furthermore, by means of the control information, for example, a control of

Energy storage done so that in its capacity already stored

electrical energy can be used for further use, for. For example, electrical energy stored in the energy store may be distributed to a consumer via the power grid. In the event that the energy storage device is not designed to store electrical energy, and accordingly stores a medium deviating from electrical energy (eg gas or heat), energy can be injected into and out of it Stromnetz only done if the einzubichernde electrical energy previously converted accordingly in the storable medium or the

stored medium is previously converted into electrical energy. Optionally, issuing or causing the outputting of the specific control information may, for example, also be made to a device of the power network (eg network control center).

For example, the control information includes one of the following

Control parameters i) to iii):

i) storing electrical energy from the distribution network into the memory; ii) extracting electrical energy from the memory into the distribution network; and

iii) no control of the energy storage.

Further, outputting or causing outputting of the specific control information may be made to the energy storage, for example. The memory can be used, for example, based on the control information for dampening or smoothing load and / or feed peaks in the power grid (eg caused by one or more photovoltaic systems and / or wind turbines). Furthermore, the determined control information may be output to a data memory. The data store stores, for example, the specific control information. Information stored in the data memory can be used, for example, as historical information. Further details are set forth below in this description.

An exemplary embodiment in all aspects provides that the

predicted load flow and / or voltage information includes power information indicative of a need, e.g. B. the absorption or release of electrical energy of the power grid, based on the

Leistungsinformation Soll and actual values for a requirement of electrical energy in the power grid are determined, and an occurrence of a load and / or Inlet tip is detected in the power grid, so that the determination of the

Capacitance information in the event of the occurrence of the load and / or feed tip is indicative of use of at least a portion of the capacity of the energy store to smooth the load and / or feed tip.

In an exemplary embodiment in all aspects, the method further comprises:

Detecting priority information indicative of compliance

Network restrictions, wherein determining the flexibility information is further based on the detected priority information.

For example, a control of the energy storage for free

Use of the capacity of the energy storage for a system / or market service use have a lower priority than compliance with network restrictions, such as defined load limits of the power grid, which should be respected or must.

The at least one device can, for example, be arranged locally at the location of the energy store. In a household, for example, both the energy store and the at least one device for carrying out the subject method are arranged in front of an electricity meter. In this case, a control of the energy storage, wherein according to the determined capacity information free

Capacity of the energy storage is available locally. Nevertheless, the

Energy storage netzdienlich example, for smoothing load and / or

Feeder tips are used in the power grid.

In an exemplary embodiment in all aspects, the method further comprises:

Detecting a release information indicative of one or more lock times and / or one or more release times of the energy storage; wherein the flexibility information is further based on the detected

Release information is determined.

The release information is defined, for example, by a primary user (eg, owner) of the energy store. For example, outputting the

Release information carried out, for. As a database, so that, for example, on the part of the power grid operator or a pool operator one or more lock times and / or release times of the energy storage can be considered. This can be taken into account, for example, in the marketing of energy that originates from the energy store and is to be distributed by means of the power grid.

For example, the output of the specific control information is suppressed in the event that the release information defines a blocking time for storing and / or extracting electrical energy into the energy store.

The blocking times and / release times of the energy storage device can determine, for example, when the memory is allowed to be operated as a network and when not. The release information can be sent, for example, to a (central) device of the

Electricity network (eg Netzleitstelle) are transmitted so that z. B. the corresponding release information of the energy storage in further planning (eg., Entire free capacity for damping or smoothing load and / or Einspeisespitzen in the power grid depending on, for example, of times of day) can be.

Based on the release information, for example, a free capacity of the energy storage, if not blocked accordingly by the release information, system and / or market serviceable be used.

For example, the release information may be indicative of one or more

Blocking periods and / or one or more release times for i) a network-serviceable, ii) a system-serviceable, iii) a marketable use of the energy store. An exemplary embodiment according to all aspects provides that the historical load flow and / or voltage information comprises measurement information, wherein the measurement information is indicative of a voltage and / or a current in the power grid. The voltage and / or the current is measured locally, for example by a measuring device, wherein z. B. the load flow by means of the measured voltage and / or the measured current to a transformer of the power grid can be measured. For example, it is also possible to determine a frequency of the measured voltage, so that it is possible to draw conclusions about the prevailing frequency of the power network.

For example, a comparison of the measured actual value (eg transmitted

Current flow via the local network) with a setpoint (eg maximum current flow via the local network). If the measured actual value deviates from the nominal value, this is due, for example, to a feed peak in the power grid. For balancing, i. In particular, the maintenance of the voltage and compliance with the load limits of the network resources in the power grid according to the target value, for example, the energy storage can be used.

By means of the measured voltage and / or the measured current can

Load flows of the power network can be determined, for example.

Furthermore, a recording of the measured current and / or voltage values can take place, for. B. by these are stored, for. B. in a data store. These stored current and / or voltage values can be used, for example, as historical load flow and / or voltage information.

A further exemplary embodiment in all aspects is characterized

characterized in that the energy store is a battery, and the

Furthermore, flexibility information is based at least in part on a

Charge state information is determined, wherein the state of charge information is indicative of a state of charge of the energy storage, and an amount represents electrical energy that can be stored in the energy storage or ausspeicherbar from the energy storage.

For example, the flexibility information may further be based on the

Charge state information can be determined.

A further exemplary embodiment in all aspects is characterized

characterized in that the energy storage is a battery, a gas storage, or a heat storage. However, the energy storage device can also convert energy into another medium as a converter (for example as a power-to-gas or power-to-heat system, the energy store in the first case being, for example, a gas storage, and in the second case for example a heat storage ).

An exemplary embodiment provides that at least one device is a decentralized control unit (for example, it is located decentrally in the energy store). Alternatively or additionally, the at least one device can be a central server (for example, it is located in a backend, wherein the connection can take place, for example, via the Internet). In an exemplary embodiment in all aspects, the specific control information by means of a telecontrol

Communication link transmitted to the energy storage.

Alternatively, in the event that the subject method in a backend, z. B. is performed by a back-end server, for example, the specific

Control information to be transmitted by means of the telecontrol communications link to the energy storage.

Under a telecontrol connection is objectively a

Remote monitoring and control of a spatially distant object (in this case z. B. the energy storage) by means of signal-converting method, from one or more locations understood.

The exemplary embodiments of the present invention described above in this description are also to be understood as being disclosed in all combinations with one another. In particular, exemplary embodiments are to be understood in terms of the different aspects disclosed.

In particular, by the preceding or following description of

Method steps according to preferred embodiments of a method also be disclosed corresponding means for performing the method steps by preferred embodiments of a device. Also should by the

Disclosure of means of a device for carrying out a

Process step also be the corresponding step disclosed.

Further advantageous exemplary embodiments of the invention are the following detailed description of some exemplary embodiments of the invention

Present invention, in particular in conjunction with the figures. The figures should, however, only for the purpose of clarification, but not for

Determining the scope of the invention serve. The figures are not to scale and are merely intended to exemplify the general concept of the present invention. In particular, features included in the figures should by no means be considered as a necessary part of the present invention.

Brief description of the figures

In the drawing shows an example of an embodiment of a system according to an objective aspect; FIG. 2 is a flow chart of an embodiment according to the method of the first aspect; FIG.

Fig. 3 is a block diagram of an embodiment of a device according to the second aspect;

4 shows different embodiments of a storage medium according to the second aspect; and Fig. 5 is a schematic flow diagram of an embodiment according to a method of the first aspect.

Detailed Description of Some Exemplary Embodiments of the Invention

Fig.l shows an example of an embodiment of a system according to a

objective aspect.

The system 100 includes a server 110 (eg, network control center), a database 120, a power grid 130 (eg, a distribution network), a controller 140, a

Power plant 150 (eg, a wind turbine), an energy storage 160 (eg, a battery), and a measuring device 170.

Several combinations of control unit 140, power generation plant 150, energy storage 160, and measuring device 170 may be connected to the power grid 130. Accordingly, a plurality of decentralized energy stores 160 are included, for example, by the power grid.

According to example embodiments, the control unit 140 detects a historical load flow and / or voltage information, detects a

Weather information, determines a predicted Lastfluss- and / or

Voltage information, determines power and / or capacity information, determines a flexibility information, and outputs the determined capacity information [e.g. To the server 110 for further use). Furthermore, the control unit 140 may detect control information (eg transmitted by the server 110), whereupon the control unit 140 effects a control (eg, storage or withdrawal of electrical energy) of the energy store 160.

For transmitting information, e.g. B. between the control unit 140 and the server 110 may each be provided a communication interface. Communication between the controller 140 and the server 110 may

For example, take place wirelessly, z. Based on a

Mobile communication or based on wireless local area network (WLAN) based communication, to name but a few non-limiting examples. A communication between the control unit 140 and the measuring device 170, and / or the energy storage 150 may, for example, be wired based on Local Area Network (LAN) based communication.

Alternatively, the detection of the historical load flow and / or

Voltage information, the acquisition of the weather information, the determination of the predicted load flow and / or voltage information, the determination of the power and / or capacity information, the determination of the

Flexibility information and / or the issuing of the particular

Flexibility information from the server 110 done. In this case, the determined flexibility information may be sent from the server 110 to the

Control unit 140 are output, so that the control unit 140 may determine, for example, a corresponding control information, which causes a control of the energy storage 160.

2 shows a flow chart of an embodiment of a method according to the first aspect, which is provided by a device, for example one of the

Devices of Fig. 3 and / or Fig. 4 is performed. For example, that will Method according to the first aspect of the control unit 140 according to FIG. 1

carried out.

In a first step 201, z. For example, the controller provides historical load flow and / or voltage information indicative of a load situation in the power grid (eg, power grid 130 of Figure 1). The measuring of a corresponding load flow and / or a corresponding voltage in the power network takes place, for example, by means of a measuring device (eg measuring device 170 according to FIG. 1), wherein the measured load flow information is transmitted, for example, from the measuring device to the control unit.

In a second step 202, the control unit detects weather information indicatively for at least one environmental attribute influencing a power generation of a power generation plant (eg power generation plant 150 according to FIG. For example, in the case of the wind turbine 150 of FIG. 1, wind information, e.g. B.

comprising a wind direction and / or a wind speed and a respectively associated time or span. Time-wise, step 202 may also be performed prior to step 201. In a third step 203, the control unit determines based on the detected weather information and the detected historical Lastfluss- and / or

Voltage information a predicted load situation in the power grid. This is for example in the present case of the wind direction and / or

Wind speed influences.

In a fourth step 204, the controller determines power and / or capacity information based on the determined predicted load flow and / or voltage information, e.g. B. for an operation of the energy storage 160 of FIG. 1. Accordingly, it is determined when the energy storage z. B. Netzdienlich must be operated to account for (local) network requirements.

Otherwise, the energy storage system can operate systematically or commercially be, with free capacity of the energy storage for storing or removing electrical energy from or into the power grid can be used in the energy storage 160. In a fifth step 205, the determination of a flexibility information indicative of a free capacity of the energy storage, which is used to store energy in addition to the amount of energy already in the energy storage

is stored, is usable, or which can be used for the withdrawal from the energy storage in the power grid.

In a sixth step 206, the flexibility information is output, for example, from the control unit to a server (for example, server 110 according to Fig. 1, eg a network control center of the power network 130 according to Fig. 1), so that the storage and / or or removing electrical energy into the energy store can be coordinated by the server. The flexibility information can also be stored, for example, in a database (eg database 120 according to FIG. One or more control units (in Fig. 1, only one control unit is shown schematically) may be connected to the server, and access these stored in the database information, and this example, as historical data for further determinations of z. B. historical load flow and / or voltage information, and / or weather information use. Subsequently, the determined

Issue flexibility information from the control unit, e.g. To the server for initiating further steps, and / or for obtaining a

Control information (eg, from the server) for controlling (eg, storing or extracting electrical energy) of the energy store.

For example, determining information (eg, performance and / or capacity information, or the flexibility information may require (intermediate) storage of information.) Information may be stored in a data store (not shown in FIG . The Data storage may be included, for example, by the control unit or connected to it.

FIG. 3 shows a block diagram of an exemplary embodiment of a device 300, which in particular can execute an exemplary method according to the first aspect. The device 300 is, for example, a device according to the second or a system according to the third aspect.

The device 300 may be, for example, a computer, a desktop computer, a server, a thin client or a portable computer (mobile device) such as a laptop computer, a tablet computer, a personal digital assistant (PDA) or a smartphone , For example, the device may perform the function of a server or a client. Processor 310 of device 300 is in particular a microprocessor,

Microcontroller, microcontroller, digital signal processor (DSP),

Application Specific Integrated Circuit (ASIC) or Field Programmable Gate Array (FPGA). Processor 310 executes program instructions stored in program memory 312 and, for example, stores intermediate results or the like in working or main memory 311. For example, program memory 312 is a non-volatile memory such as flash memory, magnetic memory, EEPROM memory ( electrically erasable programmable read only memory) and / or optical memory. Main memory 311 is for example a volatile or non-volatile

Memory, in particular a random access memory (RAM) such as a static RAM memory (SRAM), a dynamic random access memory (DRAM), a ferroelectric RAM memory (FeRAM) and / or a magnetic RAM memory (MRAM) , Program memory 312 is preferably a local volume permanently attached to device 300. With the device 300 hard-connected media For example, hard disks that are built into the device 300. Alternatively, the data carrier can also be separated, for example, with the device 300

be connectable disk such as a memory stick, a removable disk, a portable hard drive, a CD, a DVD and / or a floppy disk.

Program memory 312 includes, for example, the operating system of the

Device 300, the at least partially in. When starting the device 300 in

Main memory 311 is loaded and executed by the processor 310. In particular, when starting device 300, at least a portion of the core of the

Operating system loaded into the main memory 311 and processor 310

executed. The operating system of device 300 is, for example, a Windows, UNIX, Linux, Android, Apple iOS, and / or MAC operating system.

In particular, the operating system allows the use of the device 300 for data processing. It manages, for example, resources such as main memory 311 and program memory 312, communication interface 313, input and output

Output device 314, among other things through programming interfaces other programs basic functions and controls the execution of programs.

Processor 310 controls the communication interface 313, which may be, for example, a network interface and may be in the form of a network card, network module and / or modem. The communication interface 313 is in particular configured to establish a connection of the device 300 with other devices, in particular via a (wireless) communication system, for example a network, and to communicate with them. The communication interface 313 may, for example, data (via the

Communication system) and forward to processor 310 and / or receive data from processor 310 and send (via the communication system). Examples of a communication system are a local area network (LAN), a wide area network (WAN), a wireless network (e.g. IEEE 802.11 standard, the Bluetooth (LE) standard and / or the NFC standard), a wired network, a mobile network, a telephone network and / or the Internet. Furthermore, processor 310 may control at least one input / output device 314. Input / output device 314 is, for example, a keyboard, a mouse, a display unit, a microphone, a touch-sensitive display unit, a loudspeaker, a reading device, a drive and / or a camera. Input / output device 314 may, for example, receive input from a user and processor 310

forward and / or receive and output information to the user of processor 310.

Finally, FIG. 4 shows different embodiments of storage media on which an embodiment of a computer program according to the invention can be stored. The storage medium may be, for example, a magnetic, electrical, optical and / or different storage medium. The

For example, storage media may be part of a processor (e.g., processor 310 of FIGURE 3), such as one (non-volatile or volatile).

Program memory of the processor or a part thereof (such as program memory 312 in Fig. 3). Embodiments of a storage medium include a flash memory 410, a SSD hard disk 411, a magnetic hard disk 412, a memory card 413, a memory stick 414 (eg, a USB stick), a CD-ROM or DVD 415, or a floppy disk 416 Fig. 5 shows a schematic flow diagram of an embodiment according to a method according to the first aspect. The steps included in the flowchart 500 are performed, for example, by a control unit (eg, control unit 140 of FIG. B. for controlling an energy storage (eg., Energy storage 140 of FIG. 1) performed. Alternatively, the steps included in the flowchart 500 are combined, for example, by a control unit (e.g. Control unit 140 of Figure 1) and a server (eg, server 110 of Figure 1).

In steps 501a and 501b, weather information or historical measured values are detected. In a step 502, based on the information acquired in steps 501a and 501b, a network-wise use of an energy store is predicted. In a step 503, a so-called free flexibility - a flexibility information - of the energy storage is derived, for example, based on information of the energy storage, such as installed capacity, available power, state of charge of the energy storage or a combination thereof, a capacity of the energy storage is determined to the other

Use (eg storage of electrical energy from the power grid in the energy storage) is available. Based on the flexibility information determined in step 503

For example, in a step 504, marketing of the free capacity of the energy store may be planned. This planned marketing can as

Power requirement are marketed in a step 505, e.g. B. by means of an energy market.

In step 506, a power request for a network-aware use of the energy store is determined. Based on the performance requirement of the

Marketing according to step 505 and the network-related power request according to step 506 of the energy storage, in step 507, a

Netting and prioritization to comply with network restrictions

to be able to guarantee. This may sometimes result in a change in the performance requirements determined according to steps 505, and / or 506.

In a step 508, the implementation of the determined

Leistungsvorforderung, wherein, for example, a storing or ausstichern of electrical energy into the energy storage inside or out of the energy storage out.

In a step 509, a load flow and / or voltage information of a power grid (eg power grid 130 according to Fig. 1) with measuring equipment (eg.

Measuring device 170 of FIG. 1), which is arranged locally or locally on the energy storage, detected, for example, as historical Lastfluss- and / or

Voltage information used. Step 509 may be performed prior to step 508. For example, steps 506 through 509 are continuous (eg, continuous or spaced apart from predetermined time intervals or the like, by some non-limiting ones)

Examples) of a local control unit (eg control unit 140 according to FIG. 1), which is arranged in the immediate vicinity of an energy store (eg.

Energy storage 160 of FIG. 1) performed. Since steps 506 to 509

For example, a load flow information acquired at step 509 may be taken into account at the next execution of step 508, where a particular power request is being implemented, for example.

The information determined according to steps 501 through 504 is predicted information (or scheduling information, eg, step 504). For example, steps 501 through 504 may be timed prior to

Steps 505 to 509 are performed, e.g. B. one day before.

For example, steps 508, and / or 509 may be decentralized by a user

Control unit (eg control unit 140 of FIG.

Steps 504 and / or 505 may be performed by a backend server (eg, server 110 of FIG. For example, the backend server may take a market role, e.g. From an energy market. Steps 501a, 501b, 502, 503, 506, and 507 may be performed either decentrally by a control unit (eg, control unit 140 of FIG. 1) located at an energy store, or alternatively by a backend server (FIG. for example, server 110 of Fig. 1), the backend server

For example, in a network control center of a power grid, which with the

Energy storage is connected, arranged or included by the network control center.

The following embodiment is also to be understood as disclosed:

Decentralized storage systems are increasingly being used in distribution grids and are often subordinate to a market-driven or system-compatible operation. However, these stores also provide a benefit to the distribution network in which they are located

are connected, is to speak of a network useful benefits, in which, for example, the local overproduction of particular regenerative electricity generated is reduced and through this peak smoothing (also referred to as peak-shaving), the network load is reduced. The network-related operation is still in the legal clarification with regard to the role of owner, but it shows a high potential with further decreasing storage prices. This potential is then all the more high if the network-related operation combined with the system and / or market-appropriate operation is combined into a "multi-use-case".

By way of example, a control unit is in interaction with a) a memory which locally surplus of electrical energy (eg

Photovoltaic or wind power supply) can record and

stored electrochemically or converted into other forms of energy;

b) a local measuring device, which is in close proximity to the store

Records load flows in the power grid (ie in particular measures current and voltage and converts them into control signals with regard to load limits in the power grid); c) a measuring device for local weather conditions (in particular irradiation and / or wind speeds and directions).

In the control unit, which is installed decentralized at the memory or in the

Network interface is realized, based on an algorithm determines when the memory must be operated Netzdienlich, so that local network requirements are taken into account. For the market application (systemic or

marketable operation], this phase acts as a "red light" because the algorithm attributes the flexibility of the memory to the network use case based on past values of load profiles and weather data as well as the forecast for future values and the control box is also able to communicate accordingly if the flexibility of the storage usage can be freely used in the market and there are no network restrictions, ensuring that a) no local network bottlenecks occur or blackouts are caused by violations of local limits and b) the flexibility can be optimally exploited ,

The control unit in conjunction with the components is characterized by the fact that a decentralized solution with the acquisition of actual values for load profiles in the network as well as actual values for weather / weather conditions is realized and the control also takes into account the forecast for future values. Thus, with the corresponding stored algorithm, the flexibilities can be used as well as possible. The exemplary embodiments of the present invention described in this specification and the respective optional features and properties cited in this context should also be understood to be disclosed in all combinations with one another. In particular, the description of one of a

Embodiment covered feature - unless explicitly explained to the contrary - are not understood in this case that the feature for the function of the embodiment is essential or essential. The sequence of in this Specification described process steps in the individual flow charts is not mandatory, alternative sequences of process steps are conceivable. The

Process steps may be implemented in a variety of ways, such as implementation in software [by program instructions], hardware, or a combination of both to implement the method steps.

Terms used in the claims, such as "comprise", "comprise",

"include," "contain," and the like, do not exclude other elements or steps. The phrase "at least partially" includes both the "partial" and the "full" cases, and the phrase "and / or" shall be understood to mean that both the alternative and the case of "

"A and / or B" means "(A) or (B) or [A and B]". The use of the indefinite article does not exclude a majority. A single device can perform the functions of several units or devices mentioned in the claims. Reference signs indicated in the claims should not be regarded as limitations on the means and steps employed.

Claims

P a n t a n s p r e c h e

Method performed by at least one device, comprising:

Detecting weather information indicative of at least one

Electricity generation from a power plant influencing

Capacity information is determined based on the determined predicted load flow and / or voltage information;

Determining a flexibility information indicative of a free capacity of the energy storage, which is used for storing energy in addition to the amount of energy that is already stored in the energy storage, or is available for the withdrawal of energy into the power grid, the

Determining flexibility information based on the determined performance and / or capacity information and total capacity information indicative of the available capacity of the energy store; and

Issuing or causing the specific

Flexibility information. The method of claim 1, the method further comprising:

Detecting control information indicative of control of the

Energy storage, wherein the control information causes a storage and / or withdrawal of energy, wherein energy is stored in the energy storage from the power grid or is stored by the energy storage in the power grid; and

Issuing or causing the specific

Control information to the energy storage.

Method according to one of the preceding claims, wherein the

predicted load flow and / or voltage information

Includes power information indicative of a demand for electrical power from the power grid;

wherein, based on the power information, target and actual values for a requirement of electrical energy in the power grid are determined, and an occurrence of a load and / or feed peak in the power grid is detectable, so that the determination of the flexibility information in the event of the occurrence of the load and / or feed tip is indicative of a use of at least a portion of the capacity of the energy storage for smoothing the load and / or feed tip.

The method of any one of the preceding claims, the method further comprising:

Detecting priority information indicative of compliance

The method of any one of the preceding claims, the method further comprising:

Detecting a release information indicative of one or more lock times and / or one or more release times of the energy storage; wherein the flexibility information is further determined based on the detected release information.

6. The method according to any one of the preceding claims, wherein the historical load flow and / or voltage information comprises a measurement information, wherein the measurement information is indicative of a voltage and / or a current in the power grid.

7. The method according to any one of the preceding claims, wherein the

Energy storage is a battery, a gas storage, or a heat storage

8. The method according to any one of the preceding claims, wherein the

Energy storage is a battery, and the flexibility information is further determined at least partially based on a state of charge information, the charge state information is indicative of a state of charge of the energy storage, and represents an amount of electrical energy that can be stored in the energy storage or from the energy storage

is ausspeicherbar.

9. The method according to any one of the preceding claims, wherein the at least one device is a decentralized control unit or a central server.

10. The method according to any one of the preceding claims, wherein the specific control information by means of a telecontrol

Communication connection is transmitted to the energy storage.

11. Device which is adapted or comprises corresponding means to perform and / or to control a method according to one of claims 1 to 10.

A computer program comprising program instructions comprising a processor for executing and / or controlling a method according to any one of

Embodiments 1 to 10 cause when the computer program is running on the processor.

13. System comprising:

a plurality of devices, in particular at least one control unit, a measuring device and an energy store, which together perform a method according to one of claims 1 to 10.

14. The system of claim 13, further comprising a server, wherein the plurality of devices and the server collectively perform the method of any one of claims 1 to 10