WO2020069782A1

WO2020069782A1 - Control of a local network sector for implementing a local energy community with a timetable

Info

Publication number: WO2020069782A1
Application number: PCT/EP2019/069184
Authority: WO
Inventors: Armin Gaul; Roland Hermes
Original assignee: Innogy Se
Priority date: 2018-10-05
Filing date: 2019-07-17
Publication date: 2020-04-09
Also published as: DE102018124612A1; EP3861521A1

Abstract

The invention relates inter alia to a method, carried out by a control device, the method comprising: obtaining an item of timetable information indicative of an amount of electrical energy which is to be transmitted at at least one coupling point between a local network area and a public power supply network for a pre-defined period of time, a first method of transmission of the electrical energy within the local network area deviating at least temporarily from a pre-defined second method of transmission of the public power supply network, and a galvanic isolation of the local network area from the public power supply network at the coupling point being implemented; and controlling and/or regulating one or more elements which are comprised by the local network area, the control and/or regulation taking place at least partially based upon the timetable information obtained. The invention further relates to a device for carrying out and/or controlling said method, to a system comprising one or more devices for carrying out and/or controlling said method, and to a computer program for carrying out and/or controlling said method by means of a processor.

Description

Control of a local network area to implement local energy

Community with timetable

Territory

Exemplary embodiments of the invention relate to the control of a local

Network area for the implementation of a Local Energy Community (LEC).

background

Local energy communities are independent supply units that can be funded economically in the future according to the Winter Package.

LECs include one or more power plants, as well as one or more loads [e.g. B. Consumers). LECs form a local network area, the one

Coupling point to a higher-level, public power grid, wherein electrical energy can be exchanged between the LEC and the public power grid. Thus, the public network in particular represents a backup for the local network area in order to e.g. B. to be able to supply the LEC in case of overload or low load.

So that the public power grid is not unnecessarily influenced by such a LEC, strict requirements must be met by the LEC, in particular in order not to endanger the stability of the public power grid. This makes the construction and expansion of such LECs expensive and complex.

Summary of some exemplary embodiments of the invention

It would be desirable to have such LECs with the simplest possible technical

To be able to operate specifications in order to make them as simple as possible in terms of structure and costs, or to simplify the LECs. According to a first exemplary aspect of the invention, a method

disclosed, carried out by a control device, the method comprising:

Obtaining schedule information indicative of a quantity of electrical energy that is to be transmitted at at least one coupling point between a local grid area and a public power grid for a predefined period of time, a first transmission method of the electrical energy within the local grid area being derived from a predefined second transmission method of the public one Power network deviates at least temporarily, with a galvanic separation of the local network area from the public power network at the coupling point being implemented; and

Control and / or regulation of one or more elements that are included in the local network area, wherein the control and / or regulation is based at least in part on the received schedule information.

According to a second exemplary aspect of the invention, an apparatus is disclosed which is set up for executing and / or controlling the method according to the first aspect of the invention or comprises respective means for executing and / or controlling the steps of the method according to the first aspect of the invention. Either all steps of the method can be controlled, or all steps of the method can be carried out, or one or more steps can be controlled and one or more steps can be carried out. One or more of the means can also be carried out and / or controlled by the same unit. For example, one or more of the means can be formed by one or more processors.

The device according to the second aspect of the present invention is in particular a component (eg device) of the local network area (eg comprises or is operatively (eg electrically) connected to the at least one

Coupling point). Alternatively or additionally, the device according to the second aspect of the present invention is at least communication-related an element of the local network area (e.g. with a generation device and / or a load of the local network area). In this case, the device according to the second aspect of the present invention is e.g. B. a server. According to a third exemplary aspect of the invention, an apparatus is disclosed which has at least one processor and at least one memory which

Includes program code, wherein the memory and the program code are set up, with the at least one processor a device

(for example the device with the processor and the memory) to cause at least to execute and / or to control the method according to the first aspect of the invention. Either all steps of the

Process controlled, or all steps of the process are carried out, or one or more steps are controlled and one or more steps are carried out.

According to a fourth exemplary aspect of the invention, a system is disclosed which comprises one or more devices which are set up for executing and / or controlling the method according to the first aspect of the invention or means for executing and / or controlling the steps of the method according to the have first aspect of the invention. Either all steps of the method can be controlled, or all steps of the method can be carried out, or one or more steps can be controlled and one or more steps can be carried out. In an exemplary embodiment, the system according to the fourth exemplary aspect of the present invention comprises:

at least one device according to the second aspect of the present invention; and

one or more control and / or regulatable elements which are connected to a public power grid via at least one coupling point; wherein the at least one device and the one or more

Elements form a local network area.

According to a fifth exemplary aspect of the invention, a

A computer program is disclosed that includes program instructions that include a

Have the processor execute and / or control the method according to the first aspect of the invention when the computer program runs on the processor. Among a processor in this specification are among others

Control units, microprocessors, microcontroller units such as microcontrollers, digital signal processors (DSP), application-specific integrated circuits (ASICs) or field programmable gate arrays (FPGAs) can be understood. Either all steps of the method can be controlled, or all steps of the method can be carried out, or one or more steps can be controlled and one or more steps can be carried out. The computer program can be distributable, for example, over a network such as the Internet, a telephone or mobile radio network and / or a local network. The computer program can be at least partially software and / or firmware of a processor. It can also be implemented at least partially as hardware. The computer program can, for example, be stored on a computer-readable storage medium, e.g. a magnetic, electrical, electro-magnetic, optical and / or other storage medium. The storage medium can be part of the processor, for example, a (non-volatile or volatile)

Program memory of the processor or a part thereof. The storage medium is, for example, objective, that is to say tangible, and / or non-transitory.

These five aspects of the present invention include the following

described - partly exemplary - properties.

A transmission method (“first” or “second transmission method”), in which the local network area and / or the public power network is operated, is understood in the sense of the subject matter in particular whether electrical Energy in the local grid area and / or the public power grid in the

Direct current, alternating current, or three-phase transmission method is transmitted. The respective transmission methods can differ from each other by the network frequency used (also called nominal frequency; only applies to AC and three-phase transmission methods), the voltage, active and / or reactive power, to name just a few non-limiting examples. It goes without saying that further parameters of this type, which are related to electrical properties of the energy to be transmitted in the local network area and / or the public power grid, are used

Can characterize transmission methods accordingly.

The public power grid is operated regularly in the area of low-voltage and / or medium-voltage distribution networks using the alternating current or three-phase (i.e. three-phase) transmission method with a predefined voltage level. The low voltage distribution network has z. B. regularly a significantly lower voltage level (e.g. 400 V) than the medium-voltage distribution network (e.g. 10 kV, 20 kV or 30 kV).

Galvanic isolation of the local network area from the public power network is understood in the sense of the present subject in particular that a physical element is arranged at the at least one coupling point that enables the galvanic isolation. There is therefore no electrical line between the local grid area and the public power grid when it is implemented (e.g. a power line that connects the local grid area directly with the public power grid). Nevertheless, electrical power can be exchanged between the local grid area and the public power grid. Suitable elements are explained in detail in the following of this specification.

The present subject makes it possible to make the technical specifications of the local grid area much more generous, ie in particular with more deviation or tolerance towards the requirements of the public power grid, which otherwise would have to be fully met. Due to the galvanic isolation of the local grid area from the public power grid, the stability of the

public power grid due to prevailing operating parameters of the local

Grid area, which can sometimes differ significantly from those of the public power grid, not endangered. As a further technical effect, the

objective solution that on the side of the local network area

Control procedures for elements encompassed by this are significantly simplified since there are also no parameters which, for. B. are specified by the public power grid, must be observed.

A clear qualification for the higher-level power grid can be achieved by galvanic isolation at the at least one coupling point (e.g. a

Medium-voltage connection point to a local network). This electrical isolation enables the technical specifications for the local network area, e.g. B. a LEC, simplify or simplify compared to the public supply through the public power grid. This allows the use of

more cost-effective elements, since they do not have to meet the sometimes high requirements of the public power grid. Furthermore, technical variables (in particular frequency and voltage) of the local network area can be changed or deviated in such a way or used dynamically that those to be carried out

Control procedures in the local network area are simplified. Furthermore, z. B. the frequency as a local control variable for a

Current account can be used.

The local network area resulting from the galvanic separation from the public power grid can, on the one hand, carry out one of the

Ensure schedule information represented by the schedule (which is specified, for example, by the operator of the public power grid), and on the other hand carry out decentralized control and / or regulation of the elements of the local grid area independently of the public power grid. The public power grid is, for example, a high, medium and / or

Low voltage network. The public power grid is also referred to as a distribution grid, for example.

The local network area is self-sufficient, for example. Such a local network area is, for example, at least part of an LEC. Such a LEC is, for example, a residential area and includes all energy technology elements or

Infrastructure (s) in the residential district.

Such a local network area is characterized in particular by the fact that there is spatial proximity between the generation and consumption of the energy generated, namely, for example, within the local network area.

The local network area includes, for example, one or more elements. Such an element is, for example, a generating device or

Generation plant (e.g. (micro) combined heat and power plant, wind energy plant,

Photovoltaic system, gas and steam generation system, or the like, i.e. a device suitable for generating electrical energy) and / or a load (e.g. consumers connected to (power) lines, such as electrical devices (heat pumps, household appliances ( e.g. refrigerator and / or washing machine), consumer electronics, to name just a few non-limiting examples)) and / or a storage device (e.g. stationary storage devices, electric vehicles). In particular, one or more elements that are more controllable (e.g.

Heat pumps, stationary storage, electric vehicles) enable one

Extensive control and / or regulation of these elements included in the local network area according to exemplary aspects of the present subject. In particular, those elements of the elements encompassed by the local network area that can be large control and / or regulatable units can be controlled and / or regulated. This includes, in particular, those elements that consume and / or generate a significant percentage of electrical energy within the local network area, such as. B. generating facilities, heat pumps, stationary Storage, and / or electric vehicles, to name just a few non-limiting examples. In the event that only these aforementioned elements of the local network area can be controlled and / or regulated, an efficient control and / or regulation of the local network area can already take place according to exemplary embodiments of the present subject matter.

For example, the local network area can comprise a plurality of energy generation systems (for example, each designed as a photovoltaic system), each of which

Belong to house owners on whose roof they are installed, to name just one non-limiting example. The elements of the local network area

connecting electrical lines are, for example, jointly owned by the LEC, or are owned by the city, to name just another non-limiting example. Furthermore, the at least one coupling point between the local network area and the public power grid is not firmly defined, but can vary or be varied as far as possible depending on the requirement and / or need.

The elements included in the local network area are at least partially, preferably 100% controllable and / or adjustable. For example, the elements encompassed by the local network area, which (each) are designed as generating devices, can be controlled and / or regulated in such a way that the (respectively) electrical energy generated by them can be controlled and / or regulated. For example, the maximum possible generation capacity of one or all of them

Generating plants of the local network area are set, or reduced up to no electrical energy generated by the generating plants accordingly. The same applies to the elements included in the local network area, which are designed as loads (e.g. consumers). These can be reduced in consumption, for example, or switched off completely, to name just a few non-limiting examples of control and / or regulation. The elements of the local grid area are or comprise at least taxable and / or regulable loads that have a retroactive effect / schedule deviation compared to the public supply through the public power grid in the sense of a

Exclude balance shift (e.g. by controlling the loads: cause more or less consumption of the loads, or switch off the load (s) completely, to name just a few non-limiting examples). Typical realizations will therefore include, for example, either 100% controllable loads or a combination of loads, possibly stores and controllable generation units as elements of the local network area.

A corresponding control and / or regulatable load encompassed by the local network area can be, for example, a heating application which, for. B. storable, as well as controllable, so that, for example, the process can be interrupted. To name just a few non-limiting examples, such heat applications include e.g.

B. the operation of a immersion heater, a night storage heater, a heat pump of a cooling generator, air conditioning, or the like. A corresponding control and / or regulatable load encompassed by the local network area can

for example, an intermediate size of such a heat application and a conventional load, e.g. B. can only be switched on and off. This can be, for example, a load from areas in which control and / or regulation can be carried out, such as, for. B. in the areas of (e.g. Li-ion) batteries in which it is possible to design charging processes (e.g. charging one

Electric vehicle).

The at least one coupling point is in particular an element that is shared both by the local network area and by the (public) power network. For example, this can be a shared one

Power electronic component that is a coupling for the transmission of electrical power between the local network area and the public

Power grid guaranteed. The schedule information includes or represents, for example, a list of values of at least one parameter. Alternatively or additionally includes or

represents the schedule information, for example, one or more

Individual values as parameters that e.g. B. can be transmitted as a group as a whole or individually. The schedule information is also, for example, indicative of a specification for at least one parameter of the local network area or

upstream network (e.g. public electricity network) or a neighboring local network area. This at least one parameter is part of the example

List of values or represents a single value. For example, according to the schedule information, the at least one parameter at at least one coupling point of the local network area to the upstream network (e.g.

public power grid) or the neighboring local grid area, so that the at least one parameter on the at least one

Coupling point z. B. can be detected accordingly (e.g. measured).

The schedule information represents, for example, RUs

(Energy supply companies) -typical measurement cycles, such as B. of the duration 1 min, 5 min, 10 min, 15 min, 20 min, 30 min, 1 hour, or longer. The

Timetable information represents, for example, excess or shortages of electrical energy that were traded in accordance with the so-called balancing energy market and that should be fed into the power grid in the corresponding measurement cycle and / or should be consumed by loads connected to the power grid. The local grid area accordingly provides the energy to be fed in or consumes the corresponding energy from the public power grid.

The schedule information is obtained, for example, by receiving (eg receiving) it from a communication interface comprised by the at least one control device. The schedule information is transmitted (for example, sent) from a network control center of a public power network to the at least one control device, and then received by the device according to the second aspect. The control and / or regulation is carried out, for example, by controlling and / or regulating the (control and / or regulatable) elements of the local network area accordingly. For example, control information can be determined by the control device, e.g. B. based at least in part on the schedule information. The determined control information can then be sent to the corresponding element to be controlled or regulated (e.g. load,

Generation device, energy storage, to name just a few non-limiting examples) are output (e.g. transmitted), so that the corresponding

Element is regulated or controlled. The control information can be output, for example, by means of a control device

Communication interface. In the event that several elements of the local network area are to be controlled and / or regulated,

For example, a plurality of corresponding control information items - one for a respective element of the plurality of elements - are determined and then output to the corresponding element of the local network area.

In an exemplary embodiment according to all aspects of the invention, the schedule information is obtained from a central facility of the public electricity network, e.g. B. in which the schedule information is sent from this central device to the control device. This central facility of the public electricity network can be, for example, a server. The server can be comprised, for example, by a network control center. The network control center monitors and controls and / or regulates the public power grid, in particular to ensure the supply from the public power grid. Here, particular care is taken to ensure that the nominal frequency of the public power grid is balanced - in the sense of frequency regulation, and d. H. is kept as constant as possible. In addition, for example, local power overloads are secured in the event of a local fault and / or in the case of planned maintenance measures. If it is too big

Deviation of the actual nominal frequency from the nominal nominal frequency of the public Power supply, there may be an interruption in the supply from the public power grid.

In an exemplary embodiment according to the second aspect, the device is arranged spatially close or is spatially close to the control and / or regulatable elements comprised by the local network area in such a way that no elements of the public power grid are arranged between them.

The terms or the formulations “spatially close” or “spatially close” include in the sense of the present object that the device within a geographical radius of 10, 5, 4, 3, 2, 1 km or less to at least one further element , which is included in the local network area, is preferably arranged to all elements of the local network area.

According to an exemplary embodiment of all aspects of the invention, the first transmission method of the local network area is a direct current,

AC or three-phase transmission method.

In the event that the local grid area is in an AC or

Three-phase transmission method is operated, the local network area is operated with a defined or adjustable network frequency.

The network frequency of the local network area is also referred to as the nominal frequency of the local network area in the following of this specification. The network frequency is uniform within the local network area. The network frequency is constant over time, apart from minor deviations from the nominal value.

In the event that the local network area is operated using a direct current transmission method, the local network area is operated with a defined or adjustable voltage level or voltage. Furthermore, different voltages (e.g. 230 V, 400 V, 800 V, to name just a few non-limiting examples) can be provided to consumers on one or more taps provided by the local network area

Voltages of the local network area can be provided by using inverters and / or rectifiers both in alternating current, three-phase current and in direct current at different taps at different levels.

According to an exemplary embodiment of all aspects of the invention, the method further comprises, in the event that the first transmission method

AC or three-phase transmission method is:

Determining at least one control parameter with which at least one network frequency of the local network area is changed, the at least one control parameter being output so that the network frequency of the local network area is changed.

Setting the network frequency enables control mechanisms in the local network area, which operate according to the P (U) approach, for example. Further details are described in the following of this specification.

The at least one control parameter can also include other technical parameters, for example, so that these technical parameters can be set accordingly in the local network area by controlling and / or regulating the one or more elements. Such technical sizes that

correspondingly encompassed or can be represented by the at least one control parameter, e.g. B. harmonic parameters, short-circuit power parameters, or the like, to name just a few non-limiting examples.

The output of the control parameter has the effect, for example, that the mains frequency is adjusted or set. For example, the output takes place by e.g. B. control information is transmitted to at least one element of the local network area. For example, the transmission can take place via a communication network, e.g. B. the Internet, over a Local Area Network [LAN], over a wireless communication network (e.g. according to the Wireless Local Area Network (WLAN) and / or Bluetooth standard), over a cellular network (e.g. according to the General Packet Radio Service (GPRS), Universal Mobile Telecommunications System (UMTS), or Long Term Evolution (LTE) standard), or via a (e.g. local) radio solution (e.g. according to the Long Range Wide Area Network (LoRaWAN) specification), to name just a few non-limiting examples. It is understood that this presupposes that those elements of the local network area which are connected to one another

to communicate, one or more for such communication

include trained communication interfaces or can be connected to them.

The at least one control parameter of the local network area can further include or represent further parameters, such as current, voltage, active and / or reactive power, or the like parameters. These parameters of the at least one control parameter can be set, for example, in the local network area, so that, for. B. at the at least one coupling point (z. B. according to the schedule information specified target values) are observed.

According to an exemplary embodiment of all aspects of the invention, a plurality of coupling points are formed between the public power grid and the local grid area, the adaptation of the grid frequency of the local grid area being based at least in part on the timetable information obtained for the plurality of coupling points.

The local network area can furthermore have a plurality of coupling points to the public power network, as is described in exemplary embodiments in accordance with all aspects of the present invention in this description. Furthermore, the local network area can also be self-sufficient, i.e. H. regardless of (parent)

public electricity network. The local network area can at least temporarily, ie for a predefined period of time, operated independently from the public power grid.

Via the at least two coupling points, the local

Network area in the public power grid, or vice versa, electrical energy can be transferred. It goes without saying that the term “multiple coupling points” in the sense of the object also encompasses more than two coupling points.

The at least one control device controls and / or regulates, for example, elements comprised by the several coupling points or the elements of the local network area in such a way that certain additional or reduced requirements for electrical energy of the public power network are correspondingly transmitted at the several coupling points, for example in accordance with the schedule information.

According to an exemplary embodiment of all aspects of the invention, the at least one control device is operatively connected to the at least one coupling point or is comprised by the coupling point. The at least one control device is, for example, electrically connected to the at least one coupling point, e.g. B. via an electrical line.

According to an exemplary embodiment of all aspects of the invention, the electrical isolation from the coupling point is implemented or included, the electrical isolation being implemented in particular by means of a power electronic converter or a step-down or step-up converter.

Such a power electronic converter is, for example

Power electronic inverter, the z. B. is arranged behind a local network station. Such a buck or step-up converter is, for example, directly at the coupling point (e.g. medium-voltage connection point of a local network) arranged. The at least one control device can, for example, the

include electronic converter or a buck or step-up converter.

The galvanic isolation allows that on the public side

Power grid required framework conditions, e.g. B. to maintain the

Stability of the public power grid can be maintained, and at the same time a violation of these framework conditions is possible on the part of the local grid area without this having an impact on the public power grid.

A conventional local network transformer is usually not suitable for such galvanic isolation, since this z. B. does not allow frequency adjustment, has a local increased frequency deviation, changed requirements

Short-circuit performance, and / or susceptible to occasional harmonics, to name just a few non-limiting examples.

According to an exemplary embodiment of all aspects of the invention, a voltage change in the local network area is also set and / or compensated for by means of the at least one control parameter, the voltage change in particular by storing or releasing electrical energy into or from one or more of the local network area included storage such as B. a buffer memory takes place.

The buffer memory is, for example, in the form of a battery. For example, by storing electrical energy generated by a generation device into the memory, the stored electrical energy can be stored out of the memory at a later point in time for consumption by a consumer (eg load), which is included in the local network area Furthermore, electrical energy stored in the memory can also be transferred to the public power grid via the at least one coupling point, and vice versa. According to an exemplary embodiment of all aspects of the invention, electrical energy is transferred at least partially based on the schedule information between the local network area and the public power grid via the at least one coupling point as the transfer point, so that a setpoint value encompassed or represented by the schedule information is transmitted to the by means of a voltage-dependent active power control Transfer point is set.

The schedule information represents, for example, a power setpoint (P setpoint) which is to be maintained at the at least one coupling point. This power setpoint can be defined, for example, for a predefined time period (e.g. power supply-typical measurement cycles).

For example, the at least one control parameter can be current and / or

Define voltage parameters, wherein the at least one control parameter is or is determined based at least in part on the schedule information. The schedule information represents, for example, one or more setpoints (e.g. limit values) for voltage, current, (mains) frequency, active power and / or reactive power, to name just a few non-limiting examples that can be found at a specific coupling point (or Coupling points in the event that a large number of coupling points (e.g. at least two coupling points exist between the local network area and the public power grid) are to be balanced (e.g. set).

This allows an active power and / or at any time in accordance with the schedule information at the at least one coupling point

Voltage regulation takes place on the part of the elements included in the local network area.

Additionally or alternatively, a control mechanism can be implemented, which is implemented according to the P (U) approach such that, for example, a falling voltage at the at least one coupling point is interpreted as a consumption signal. On This consumption signal, indicative of a quantity of electrical energy, can be controlled and / or regulated by one or more memories included in the local network area, so that electrical energy can be extracted or stored accordingly in the one or more memories.

According to an exemplary embodiment of all aspects of the invention, the at least one coupling point provides several different DC voltages for use by the local network area.

The at least one coupling point can be, for example, two or more

Rectifiers include. The at least one coupling point encompasses this

Rectifiers, for example, in that the rectifiers are operatively (e.g. electrically) connected to the coupling point.

Accordingly, for example, several [at least two] different DC voltages at the coupling point, e.g. B. for tap by consumers. For this purpose, for example, a direct current rail is suitable as a transfer point for the consumers. The DC rail can, for example, DC voltages of different heights, for. B. 400 V and 800 V, provide.

800 V DC in particular is suitable, for example, for charging electric vehicles.

According to an exemplary embodiment of all aspects of the invention, the at least one coupling point to a fixed operating point is through the

Adjusting the network frequency of the local network area to a predefined value.

For example, control information or a control parameter comprising, for example, a plurality of parts, each part being determined for a specific element encompassed by the local network area, comprising or representing information relating to its control and / or regulation. Alternatively or additionally, a separate element can be created for each element included in the local network area (e.g. separate) control information can be determined. It goes without saying that for the latter case all the specific control information is then sent to the corresponding elements of the local one in the manner described in this specification

Network area issued or whose output must be arranged accordingly.

According to an exemplary embodiment of all aspects of the invention, there is a communication connection between the control device of the local one

Network area and in particular a central network control center of the public

Power network for the transmission of one or more information.

For this purpose, the at least one control device comprises, for example, a

Communication interface. The timetable information can be found on the

Communication interface can be received, for example. B. from a network control center of the public power grid. The at least one control parameter can also be transmitted (for example transmitted) to one or more elements that are included in the local network area, for example via the communication interface.

The ones described above, which basically stand alone

Embodiments and exemplary configurations of all aspects of

The present invention should also be understood to be understood in all combinations with one another.

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

present invention, in particular in connection with the figures. However, the figures enclosed with the application are only intended for the purpose of

Clarification, but not used to determine the scope of the invention. The accompanying drawings are not necessarily to scale and are only intended to exemplify the general concept of the present invention reflect. In particular, features which are contained in the figures should in no way be regarded as a necessary part of the present invention.

Brief description of the figures

Show it:

1: a schematic representation of an exemplary embodiment of a

Systems according to the present invention;

2: a schematic representation of an exemplary embodiment of a

Device according to the present invention; and

FIG. 3 shows a flow diagram of an exemplary embodiment of a method that can be carried out, for example, by the control device 110 of the system of FIG. 1 in the context of the present invention.

Detailed description of some exemplary embodiments of the invention

1 is a schematic illustration of an exemplary embodiment of a system 100 in accordance with the present invention.

1 shows a schematically represented local network area 120 with three coupling points 180-1, 180-2, 180-3 to a public power grid 130 in the present case. The coupling points are each present via a transformer with the

[higher-level] public power grid 130 (eg a medium-voltage grid). The power grid 130 can be connected to several of such local grid areas [not shown in FIG. 1] in the manner of the local grid area 120, with one or more coupling points between such a local network area and the public power grid 130.

The system 100 includes a control device 110, which is included in the local network area 120. The control device 110 comprises a communication interface [cf. Communication interface 230 of FIG. 2). About the Communication interface, the control device 110 z. Legs

Receive schedule information (e.g. received). The schedule information can be transmitted, for example, from a device (for example a server of a network control center) of the public electricity network 130 to the control device 110.

5

In the present case, the local network area 120 comprises one memory 140, several

House connections 160-1 to 160-5, which form loads of the local network area 120, a plurality of electrical energy generating devices 150-1, 150-2, 150-3, the generating devices 150-1, 150-2 being constructed as photovoltaic systems L0 and For example, are arranged on a roof of the house that includes the house connection 160-1 or 160-2. In the present case, the generating device 150-3 is designed as a wind energy installation. Furthermore, the local network area 120 comprises an electric vehicle 160-6 as a load, which is connected to the local network area 120 for charging, for example.

L5

Starting from each of those covered by the local network area 120

Transformers of the coupling points 180-1, 180-2, 180-3 a distribution line 170 - which is designed as an electrical line - extends to the elements that are included in the local network area 120. Such transformers 180-1, 180- Ü0 2, 180-3 can for example be designed as electronic transformers.

The coupling points can enable operation of a direct current (DC) network, for example. In the latter case, for example, rectifiers are included in the respective coupling points instead of the transformers. It goes without saying that a respective corresponding coupling point is an alternative to that

Ü5 corresponding transformer shown in Fig. 1 180-1, 180-2, 180-3 in

certain applications also equivalent by a rectifier,

Converter, or electronic transformer can be realized.

In the present case, the energy store 140 is designed as a battery or rechargeable battery and allows energy to be stored therein and stored energy to be used for consumption by elements of the local network area 120, and / or via one or feed several of the transformers, which are encompassed by the respective coupling points 180-1, 180-2, 180-3, into the public power grid 130.

The control device 110 can, for example, form a switching device so that it is possible to use individual elements of the local network area 120 (in the present case, for example, house connections 160-1 to 160-6, generating devices 150-1 to 150-3, and the memory 140). targeted supply of electrical energy, so that a

These elements are controlled and / or regulated.

The coupling point 180-1 in the present case comprises two taps for electrical energy. This is shown schematically by the two solid lines leading from the transformer of the coupling point 180-1 to the distribution line 170. The taps can provide, for example, direct, alternating or three-phase current. In the event that the two taps are DC taps, these can e.g. B. provide voltages of different heights, e.g. B. once 400 V and once 800 V, just to name a non-limiting example.

The coupling point 180-2 in the present case comprises a tap for electrical energy. This is illustrated schematically by the single dashed line that leads from the transformer of the coupling point 180-2 to the distribution line 170.

The coupling point 180-3 in the present case comprises three taps for electrical energy. This is shown schematically by the three dashed lines drawn by the

Transformer of the coupling point 180-3 lead to the distribution line 170 shown. The taps can provide, for example, direct, alternating or three-phase current. It is understood that in the event that at least two of the taps provide direct current, this is analogous to the explanations for the

Coupling point 180-1 z. B. can provide voltages of different heights. The coupling points 180-1 _» 180-2 _» 180-3 each include a galvanic one

Separation according to exemplary aspects of the present subject.

FIG. 3 shows a flow diagram 300 of an exemplary embodiment of a method according to the first aspect of the present invention, which in the context of the present invention can be carried out, for example, by the control device 110 of the system of FIG. 1. The control device 110 can be designed, for example, as a device 200 in FIG. 2. In a first step 310, schedule information is obtained. The

Timetable information is obtained, for example, from a communication interface comprised by the control device 110 (eg communication interface 330 of the device 300 according to FIG. 3) [e.g. B. received). The schedule information is transmitted, for example, from a network control center of a public power network (e.g. power network 130 according to FIG. 1), to which a local network area, which includes the control device 110, is transmitted to the control device 110 (e.g. sent).

In a second step 321 there is a control and / or regulation of the controllable and / or regulatable elements which are included in the local network area, e.g. B. based on a specific control parameter (see step 322). The control and / or regulation of the control and / or regulatable elements is carried out, for example, by the specific control parameter being transmitted from the control device 110 to the corresponding elements to be controlled or regulated (e.g. memory 140; generation systems 150-1, 150-2, 150-3; electrical consumers (loads) 160-1 to 160-6) is transmitted, e.g. B. over that included by the control device 110

Communication interface. The at least one control parameter in the optional step 322 is determined, for example, by the control device 110. The at least one control parameter is determined, for example, based at least in part on the timetable information obtained (cf. step 321). The schedule information specifies, for example, how much (electrical)

Power over a certain coupling point (e.g. coupling points 180-1, 180-2, 180-3) to be fed into the public power grid. Correspondingly, for example, the at least one specific control parameter (cf. step 322) can be determined in such a way that a storage device (eg energy storage device 140 of FIG. 1) provides this required electrical energy. The one from that

Energy provided by energy storage does not have to meet the technical requirements of the public power grid, such as a specific one

Transmission method and a predefined frequency (e.g.

AC transmission methods and 50 Hz) support, because at one or more coupling points (e.g. coupling points 180-1, 180-2, 180-3 of FIG. 1) there is a galvanic separation between the local network area (cf. local network area 120 of FIG . 1) and the public power grid (cf. public

Power network 120 of FIG. 1) is realized. Step 321 and optional step 322 are combined in box 320, since these are a logical and / or

can form a functional unit.

FIG. 2 shows a schematic illustration of an exemplary embodiment of a device 200 that can be used in the context of the present invention.

The device 200 can, for example, represent the device 110 (control device) according to FIG. 1 (and then, for example, the method of

Execute flow diagram 300 of FIG. 3). Furthermore, the device 200 can be comprised, for example, by an element (eg elements 140, 150-1 to 150-3, 160-1 to 160-6 of FIG. 1), in particular a controller and such can be controlled by means of an actuator 260 / or regulation of the corresponding element.

Device 200 includes a processor 210 with associated working memory 240 and program memory 220. Processor 210, for example, performs

Program instructions stored in program memory 220. The program instructions carry out the procedure according to the first aspect of

Invention from and / or control this. Program memory 220 thus contains and sets a computer program according to an exemplary aspect of the invention Computer program product for storing it. Device 200 represents an example of a device according to the second aspect of the invention.

The program memory 220 can be, for example, a persistent memory, such as a read-only memory (ROM) memory. The program memory 220 can, for example, be permanently connected to the processor 210, but can alternatively also be releasably connected to the processor 210, for example as a memory card, floppy disk or optical data carrier medium (for example a CD or DVD). Further information can also be stored in the program memory 220, or in a separate memory.

The working memory 240 is used, for example, for storing temporary results during the processing of the program instructions. It is, for example, a volatile memory, such as a random access memory (RAM) memory.

The processor 210 is also operatively connected to a communication interface 330, with which, for example, an exchange of information with others

Devices is possible (see, for example, the arrows or connections between the entities or elements comprised by the system 100 according to FIG. 1).

The device 200 can also contain or comprise further components.

For example, one or more sensors 250 are or are included, for example, for the acquisition (e.g. measurement) of measured values at a coupling point (e.g. coupling points 180-1, 180-23, 180-3). between a local network area (e.g. local network area 120 according to FIG. 1) and a public power network (e.g. power network 130 according to FIG. 1) is or are set up as a structural and / or functional unit and with the processor 210 is operatively connected or is comprised by this. The device 200 can furthermore have one or more actuators 260 as structural and / or functional

Include unit (s) operatively connected to processor 210. The actuator 260 can be configured, for example, to control and / or regulate an element of the local network area (cf. also step 321 of the

Flow chart 300 of FIG. 3).

The exemplary embodiments / exemplary embodiments of the present invention described in this specification are to be understood as being disclosed both individually and in all combinations with one another. In particular, the description of a feature included in an embodiment - unless explicitly stated otherwise - should not be understood in the present case to mean that the feature is essential or essential for the function of the embodiment. The sequence of the process steps described in this specification in the individual flowcharts is not mandatory, alternative sequences of

Process steps are conceivable. The procedural steps can be implemented in various ways, such as implementation in software (through program instructions], hardware, or a combination of both

Implementation of the procedural steps conceivable.

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

"Include", "Contain" and the like do not exclude further elements or steps. The wording "at least partially" includes both the case "partially" and the case "complete". The wording "and / or" should be understood to mean that both the alternative and the

Combination should be disclosed, ie "A and / or B" means "(A) or (B) or (A and B]". A plurality of units, people or the like means in

Connection of this specification to multiple units, people or the like. The use of the indefinite article does not preclude a majority. A single device can perform the functions of several units or devices mentioned in the claims. Reference numerals given in the claims are not to be regarded as restrictions on the means and steps used.

Claims

Patent claims

1. A method carried out by a control device comprising:

Obtained from a schedule information indicative of a lot of electrical

Energy, which is to be transmitted for at least one coupling point between a local grid area and a public power grid for a predefined period of time, a first transmission method of the electrical energy within the local grid area being transmitted from a predefined second one

Transmission method of the public power grid deviates at least temporarily, with a galvanic separation of the local network area from the public power grid being realized at the coupling point; and

2. The method according to claim 1, wherein the first transmission method of the local network area is a direct current, alternating current or

AC transmission method is.

3. The method of claim 2, wherein the transmission method is AC or three-phase transmission method, further comprising:

Determining at least one control parameter with which at least one network frequency of the local network area is changed, the at least one control parameter being output, so that the network frequency of the local one

Network area is changed.

4. The method according to claim 3, wherein the at least one coupling point to a fixed operating point is balanced by adapting the network frequency of the local network area to a predefined value.

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

Control device is operatively connected to the coupling point or is comprised by the coupling point.

6. The method according to any one of the preceding claims, wherein the electrical isolation from the coupling point is realized or included, wherein the electrical isolation is realized in particular by means of a power electronic converter or a step-down or step-up converter.

7. The method according to any one of claims 3 to 6, wherein by means of the at least one control parameter, a voltage change in the local network area is also set and / or compensated, the voltage change in particular by storing or releasing electrical energy into or from one or more storage comprised by the local network area takes place.

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

at least one coupling point is transferred as a transfer point for electrical energy based at least in part on the schedule information between the local network area and the public power grid, so that one of the

Schedule information included or represented setpoint on the

Transfer point is set.

9. The method according to any one of the preceding claims, wherein the at least one coupling point further provides several different DC voltages for use by the local network area.

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

Coupling points between the public power grid and the local one

Network area are formed, the setting of the transmission method of the local network area based at least in part on the received

Timetable information takes into account the multiple coupling points.

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

There is a communication link between the control device of the local network area and a central network control center, in particular, of the public power network for transmitting one or more information.

12. The device, configured to execute and / or control the method according to one of claims 1 to 11 or comprising respective means for

Execution and / or control of the steps of the method according to one of claims 1 to 11.

13. The device according to claim 12, wherein the device has spatial proximity or spatial proximity to the control and / or regulatable elements encompassed by the local network area such that no elements of the public power network are arranged between them.

14. System comprising:

at least one device according to one of claims 12 or 13; and one or more control and / or regulatable elements which are included in the one local network area and are connected to a public power network via at least one coupling point;

wherein the at least one device and the one or more elements are included in the local network area.

15. A computer program comprising program instructions that cause a processor to execute and / or control the method according to one of claims 1 to 11 when the computer program runs on the processor.