Energy measuring device, system and method for determining an emission quantity of a substance that occurs for generating consumed energy

Abstract

The invention relates to an energy measuring device (1a, 1b, 1c) that can be connected to an electrical network (2a, 2b, 2c) for determining the energy consumption of a load (3) connected thereto, comprising a communication unit (4) which can be coupled to a central unit (10), a measuring unit for measuring current and / or voltage, and an evaluation unit connected to the measuring unit and to the communication unit (4) for determining an energy drawn from the network (2a, 2b, 2c). The energy measuring device (1) is designed to receive data relating to the energy composition of the drawn energy, to calculate an emission quantity of a substance that occurs for generating the determined energy, said calculation being based on the data relating to the energy composition, the determined energy and a specified assignment rule, and to provide said calculated emission quantity via the communication unit (4). The invention also relates to a system (20) comprising a plurality of corresponding energy measuring devices (1a, 1b, 1c) and a central unit, and to a method, each for determining a total emission quantity of a substance that occurs for generating the drawn energy.

Description

[0001] Energy measuring device, system and method for determining the quantity of emissions of a substance incurred in the production of consumed energy

[0002] The present application relates to an energy measuring device, a system comprising a plurality of energy measuring devices as well as a central unit and a method for determining the quantity of emissions of a substance incurred in the generation of energy taken from an electrical network.

[0003] Electrical energy is needed and consumed today for a wide variety of applications, including in private and industrial settings. The generation of electrical energy typically releases greenhouse gases and air pollutants, so-called energy-related emissions, into the environment. These emissions at least affect the environment, and often do so in a particularly long-term way. Therefore, comprehensive measures must be taken to reduce climate-damaging emissions. An important aspect of this is determining the emissions resulting from the generation of each unit of electrical energy consumed.

[0004] For example, the production process of a product in the manufacturing industry typically comprises several different production steps or work processes, as the product usually consists of multiple components that are often manufactured at different production sites. In this case, the total energy consumed for the production of the product is difficult to determine, due in part to the individual energy quantities of a specific energy source used, such as wind energy, solar energy, nuclear energy, etc. Furthermore, since the various production sites draw energy at different times, and this energy usually has a different energy composition depending on the time of consumption, determining the total amount of emissions generated during the production of the product becomes very complex.In the automotive sector, there are already developments aimed at determining the carbon dioxide (CO2) emissions of a vehicle through its fuel consumption. For example, WO 2021 / 028140 Al concerns a CO2 measuring and metering system for a vehicle, in which CO2 emissions and the vehicle's absolute CO2 footprint are determined, among other things, based on data on the electricity or energy composition used during charging / refueling.

[0005] Energy meters, especially smart meters, are used to measure energy consumption. These devices digitally record, store, and transmit the consumed electricity or energy. However, they typically do not provide information about the types and quantities of emissions released to generate the energy consumed.

[0006] In light of the aforementioned aspects, a key concept of the present invention can be seen in implementing a further, in particular dynamic, parameter in energy measuring devices, which indicates the emission quantity of a substance emitted during the generation of a given amount of energy consumed.

[0007] Accordingly, at least one object of the present invention is to provide an improved energy measuring device such that it can determine, as accurately, reliably, and simply as possible, the corresponding emission quantity of a substance released during the generation of a given amount of energy consumed. Furthermore, it is an object of the present invention to provide a system comprising a plurality of energy measuring devices and a method within such a system by which the total emission quantity of a substance that has been released or emitted at different locations for the generation of the respective amounts of energy consumed can be determined, particularly in energy-consuming processes such as the manufacture of products or the energy supply of buildings or building complexes.The solution of the invention is represented by an object having the features of the respective independent claims. Advantageous embodiments and further developments are the subject of the further features of the respective dependent claims.

[0008] Accordingly, the solution according to the invention relates to an energy meter that can be connected to an electrical network and, when connected, is configured to determine the energy consumption of an electrical load connected to the energy meter. The energy meter comprises a communication unit via which the energy meter can be coupled to a central unit for sending and / or receiving data, as well as a measuring unit configured to measure a current flowing through the energy meter and / or a voltage applied to the energy meter, and an evaluation unit that is electrically connected to the measuring unit and the communication unit and configured to determine energy drawn from the electrical network based on the measured current and / or voltage.The energy meter is configured to receive data on the energy composition of the energy drawn from the electrical grid via the communication unit. The evaluation unit of the energy meter is further configured to calculate, based on the energy composition data and the determined energy drawn, a quantity of emissions of a first substance required to generate the determined energy, according to a predefined allocation rule, and to provide this calculated quantity of emissions of the first substance via the communication unit, in particular to transmit it to the central unit.

[0009] The energy measuring device according to the invention is characterized in that, for every measured amount of energy drawn from the electrical grid, it can always determine, as a further parameter, the emission quantity of a first substance generated during the generation of the measured energy drawn. The first substance corresponds in particular to a greenhouse gas or a so-called CO2 equivalent, or to an air pollutant. Such an air pollutant can be, for example, particulate matter or one or more heavy metals released during energy generation in coal-fired power plants.

[0010] To determine this emission quantity, the energy meter receives data on the energy composition of the energy drawn from the electrical grid and measured via its communication unit. This data can be stored, for example, in a storage device or evaluation unit of the energy meter. Depending on the electrical grid from which the energy meter draws power, it can, in one exemplary embodiment, receive and store this energy composition data only once, and in particular only once, via the communication unit. This is especially advantageous if the energy composition of the energy drawn from the electrical grid does not change over time, i.e., remains constant.Thus, the energy meter can access the stored energy composition data each time it determines the amount of energy drawn from the electrical grid and, based on this data and the first allocation rule, determine the corresponding emission quantity of the first substance. Alternatively, instead of receiving the energy composition data only once, in another exemplary embodiment, the energy meter can also receive the updated energy composition data for each energy drawn from the electrical grid at regular intervals via the communication unit. In particular, the energy meter can receive this energy composition data continuously, i.e., in real time.For example, this can be achieved by equipping the energy meter to independently retrieve data on the energy composition of the energy drawn from the electrical grid from a database or a central unit and store it in a storage device or evaluation unit of the energy meter. This is particularly advantageous in cases where the energy composition of the energy drawn from the electrical grid varies, especially significantly, throughout the day, as it ensures that the energy meter always has access to current data on the energy composition for determining the emission quantity required to generate the measured energy. Accordingly, the emission quantity of the first substance can be calculated very precisely using the first allocation rule. Depending on the specific application, the energy meter can also be reprogrammed.

[0011] The first allocation rule required to determine the emission quantity can be defined, in particular, by at least one conversion factor for calculating a specific emission quantity of the first substance as a function of a particular form of energy that is included in the extracted energy according to the energy composition data. The conversion factor is, in particular, a proportionality factor between the emission quantity of the first substance and a specific energy quantity, especially a normalized one. Consequently, if the extracted energy comprises a certain number of energy forms greater than one, the first allocation rule is necessarily also defined by a number of conversion factors corresponding to that certain number.The first allocation rule can be stored, in particular, in the energy meter, specifically in a storage device of the energy meter, wherein the storage device is electrically connected to the evaluation unit or is designed as a component of the evaluation unit. In particular, the first allocation rule can already be stored in the energy meter in its delivered state. For example, the first allocation rule can be stored in the form of at least one table. Furthermore, the energy meter can, for example, be configured to receive the first allocation rule together with the respective data on the energy composition via the communication unit and then process this information in the evaluation unit to determine or calculate the emission quantity of the first substrate based on the previously determined energy drawn from the electrical grid.For example, the central unit may be configured to send or transmit the first allocation rule together with the respective data on the energy composition to the energy meter, or the energy meter may be configured to independently retrieve the first allocation rule together with the respective data on the energy composition from the central unit or a database.

[0012] Furthermore, the energy meter can, for example, include a display unit. The evaluation unit of the energy meter can be configured to transmit the calculated emission quantity of the first substance to the display unit, and the display unit can be configured to display the calculated emission quantity of the first substance, in particular to display it visually, e.g., in the form of a specific numerical value, a diagram, or a graph. Of course, the energy drawn from the electrical network can also be displayed by the display unit, either additionally or alternatively.

[0013] In a further development, the evaluation unit of the energy meter can be configured to calculate, based on the energy composition data and the determined energy extracted, a quantity of emissions of a second substance resulting from the generation of the determined energy, according to a predefined second allocation rule. The calculated emission quantity of the second substance can then be made available via the communication unit, in particular by sending it to the central unit. The first and second substances are distinct and correspond either to a CO2 equivalent or to an air pollutant.The second allocation rule is also stored in the storage device of the energy meter and is defined by at least one conversion factor for calculating a respective specific emission quantity of the second substance depending on a respective form of energy that is included in the extracted energy according to the data on the energy composition.

[0014] Furthermore, the evaluation unit of the energy meter can, for example, be configured to calculate, based on a predefined third allocation rule, the emission quantity of a third substance incurred in generating the measured energy and to provide the calculated emission quantity of the third substance via the communication unit. Determining the emission quantity of more than three substances based on corresponding predefined allocation rules using the energy meter is also possible.

[0015] In the manner described above, the energy measuring device according to the invention thus makes it possible to determine the respective emission quantity of various substances released during the generation of energy drawn from the electrical grid. Based on information, preferably current, concerning the energy composition of the energy drawn, the energy measuring device can determine, based on one or more allocation rules, the emission quantity resulting from the energy drawn, which is specific to a particular substance. This substance is, in particular, a greenhouse gas or a CO2 equivalent or an air pollutant, for example, particulate matter, heavy metals, nitrogen oxides, etc.

[0016] Furthermore, the solution of the present invention relates to a system, in particular for determining the quantity of emissions of a first substance resulting from the generation of energy drawn from an electrical network, comprising a plurality of energy measuring devices, each connected to an electrical network, wherein each of the plurality of energy measuring devices is designed in particular according to the energy measuring device described above, for determining the energy consumption of an electrical consumer connected to the energy measuring device and a central unit, which may in particular be designed as a central controller or as a central server.Each of the multiple energy meters comprises a communication unit, a measuring unit configured to measure the current flowing through the respective energy meter and / or the voltage applied to the respective energy meter, and an evaluation unit electrically connected to the measuring unit and the communication unit. This evaluation unit is configured to determine the energy drawn from the respective electrical network based on the measured current and / or voltage. The central unit is in communication with each of the multiple energy meters via the respective communication unit and is configured to provide each of the multiple energy meters with data on the energy composition of the energy drawn from the respective electrical network.Each of the multiple energy meters is configured to receive the provided energy composition data via its own communication unit. Based on this received energy composition data and the energy drawn, the respective evaluation unit calculates, using a predefined allocation rule, the emission quantity of a first substance required to generate the measured energy. This calculated emission quantity of the first substance is then transmitted via the individual communication unit to the central unit. Furthermore, the central unit is configured to receive the calculated emission quantity of the first substance from each of the multiple energy meters and to calculate the total emission quantity of the first substance from these received emission quantities.

[0017] Furthermore, the solution according to the present invention also relates to a method, in particular for determining the emission quantity of a first substance incurred in the generation of energy drawn from an electrical network, within a system comprising a plurality of energy measuring devices, each connected to an electrical network, and a central unit that is in communication with each of the plurality of energy measuring devices, in particular within a system according to the preceding description. The method comprises the following steps:

[0018] - Determining the amount of energy drawn from an electrical network to supply an electrical consumer using a respective energy meter (or the majority of energy meters).

[0019] - Providing data on the energy composition of the respective energy drawn from an electrical network,

[0020] - Calculating the respective emission quantity of a first substance, which was generated for the production of the respective energy extracted from an electrical network, based on the provided data on the energy composition and on the respective extracted energy based on a given first allocation rule by a respective energy measuring device of the plurality of energy measuring devices,

[0021] - Transmitting the calculated respective emission quantity of the first substance from each energy meter or the plurality of energy meters to the central unit, and

[0022] - Calculating a total emission quantity of the first substance from the calculated respective emission quantities of the first substance by the central unit.

[0023] The invention is described in more detail below with reference to some preferred, but merely exemplary, embodiments and the accompanying drawings. The drawings show:

[0024] Figure 1: a schematic representation of an energy measuring device according to a first

[0025] embodiment of the invention,

[0026] Figure 2: a schematic representation of a system according to a first

[0027] embodiment of the invention,

[0028] Figure 3: a schematic representation of a system according to a second

[0029] embodiment of the invention,

[0030] Figure 4: a schematic representation of a system according to a third

[0031] embodiment of the invention,

[0032] Figure 5: an exemplary table comprising data on energy composition and a given initial allocation rule,

[0033] Figure 6: a schematic representation of a method within a system according to Figure 2, 3 or 4 according to a first embodiment of the invention; Figure 7: a schematic representation of work steps taking place within an energy meter according to a second embodiment of the invention compared with work steps of a standard energy meter.

[0034] Figure 1 shows a schematic representation of an energy meter 1 according to a first embodiment of the invention. The energy meter 1 can be connected to an electrical network 2 and, in the embodiment shown in Figure 1, is connected to it. In the state connected to the electrical network 2, the energy meter 1 is designed to determine the energy consumption of an electrical load 3 connected to the energy meter 1. The energy E drawn from the electrical network 2 can be composed of various forms of energy, with the energy forms typically having different percentage shares of the energy E drawn from the electrical network. This is often also referred to as the energy mix of the energy E drawn from the electrical network.

[0035] The energy meter 1 shown in Figure 1 comprises a communication unit 4, via which the energy meter 1 can be connected to a central unit 10, which may be configured, for example, as a central controller or a central server, for sending and / or receiving data. The energy meter 1 further comprises a measuring unit 5, which is configured to measure a current flowing through the energy meter 1 and / or a voltage applied to the energy meter, as well as an evaluation unit 6, which is electrically connected to the measuring unit 5 and the communication unit 4 and is configured to determine the energy E drawn from the electrical network 2 based on the measured current and / or the measured voltage. The evaluation unit 6 therefore receives corresponding measurement data from the measuring unit 5 and evaluates this data to determine, in particular to calculate, the energy drawn from the electrical network 2.The energy measuring device 1 is further configured according to Figure 1 to transmit data on the energy composition Ei, E2, .. E. via its communication interface 4. n to receive the energy E drawn from the electrical network 2 to supply the electrical consumer 3. Within the scope of the present invention, the term energy composition of the energy drawn from the electrical network or data on the energy composition are to be understood as the different percentage proportions of the respective energy forms contained in the energy drawn from the electrical network.

[0036] Receiving this data on the energy composition Ei, E2, . . E n This can be done in various ways. For example, the energy measuring device 1 can be configured to record the data on the energy composition Ei, E2, ... E nThe energy drawn from the electrical network 2 is received once via the communication unit 4, and the received data on the energy composition is stored, e.g., in a storage device 7 of the energy meter. This is particularly advantageous if the energy composition of the energy drawn from the electrical network 2 does not change over time, i.e., remains the same or constant, or changes only slightly over time. If, for example, the energy meter 1 is connected to the electrical network of a permanently installed photovoltaic system, the energy mix of the energy drawn from this electrical network is predetermined. As an alternative to receiving the data on the energy composition only once, the energy meter 1 can, for example, be configured to store the data on the energy composition Ei, E2, ... E nThe energy drawn from the electrical network 2 is updated at regular intervals, particularly in real time, and is received via the communication unit 4 and stored in the evaluation unit 6 or a storage device 7 of the energy meter 1. In particular, the energy meter 1 can also be configured to independently retrieve or download this regularly updated data from a database 30 or from the central unit 10. Furthermore, the energy meter 1 can also be configured to send a signal to a database or the central unit 10 requesting the regularly updated data on the energy composition Ei, E2, ... E. nThis includes the fact that the energy meter 1 always has access to current data on the energy composition for determining the amount of emissions generated or released during the production of the measured energy. This is particularly advantageous in cases where the energy composition of the energy drawn from the electrical grid varies, especially significantly, throughout the day and also depending on the season. Based on the knowledge of current data on the energy composition, the emission quantity of the first substance can therefore be calculated very precisely using the first allocation rule. Depending on the specific application, the energy meter 1 can also be reprogrammed accordingly, i.e.,Depending on the application, it either receives data on energy composition only once and uses this as the basis for calculating a respective emission quantity, or it receives updated data on energy composition at regular intervals and thus uses current data for each calculation of the emission quantity.

[0037] The evaluation unit 6 of the energy measuring device 1, shown by way of example in Figure 1, is designed to determine the energy composition Ei, E2, .. E based on the received data. nand, based on the energy extracted by the evaluation unit 6, to calculate, according to a predetermined first allocation rule ZVI, the emission quantity of at least one first substance incurred in generating the determined energy, and to provide this calculated emission quantity of the at least first substance via the communication unit 4, in particular to send it to the central unit 10. For the purposes of this invention, a substance, e.g., the first substance, is understood to be an environmentally affecting or even environmentally harmful substance. The emission quantity of this first substance incurred, released, or emitted in generating the determined energy can, for example, relate to the emission quantity of a CO2 equivalent, a single greenhouse gas, or air pollutants.Accordingly, the first substance can be, for example, a CO2 equivalent, a greenhouse gas, especially CO2, or an air pollutant such as particulate matter or heavy metals, which are emitted, for example, during energy production in coal-fired power plants. The first allocation rule (ZVI) required to determine the emission quantity can be defined, for example, by at least one conversion factor for calculating a specific emission quantity of the first substance as a function of a particular form of energy, which, according to the energy composition data, is included in the extracted energy. The conversion factor is, in particular, a proportionality factor between the emission quantity of the first substance and a specific energy quantity, especially a standardized one.If the energy drawn from the electrical network 2 comprises a certain number of energy forms, where this number is greater than one, then the first allocation rule is necessarily also defined by a number of conversion factors corresponding to this certain number. The allocation rule ZVI described above can also be referred to as an allocation function. As shown by way of example in Figure 1, the first allocation rule ZVI is stored in the energy meter 1, specifically in the storage device 7 of the energy meter. In the embodiment shown in Figure 1, the storage device 7 is designed as a component of the evaluation unit 6, but in another embodiment not shown, it can also be designed as a separate component that is electrically connected to the evaluation unit 6. For example, the first allocation rule ZVI can already be stored in the energy meter 1 in its delivered state.In an exemplary embodiment, the first allocation rule ZV2 can be stored in the form of at least one table. The energy meter 1 can, for example, further be configured to store the first allocation rule ZVI together with the respective data on the energy composition Ei, E2, ... E. n The communication unit 4 receives this information, and this information is then processed in the evaluation unit 6 to determine or calculate the emission quantity of the first substrate based on the previously determined energy drawn from the electrical network 2, as illustrated in more detail in Figure 7. The central unit 10 can, for example, be configured to process the first allocation rule ZVI together with the respective data on the energy composition Ei, E2, E nto send or transmit to the energy meter 1, or the energy meter 1 can be configured to send the first allocation rule ZVI together with the respective data on the energy composition Ei, E2, E n independently retrieved from the central unit 10 or alternatively from a database.

[0038] As can be seen in Figure 1, a predefined second allocation rule ZV2 is also stored in the storage device 7 of the energy meter 1, and further predefined allocation rules can also be stored in the storage device 7, as indicated by the corresponding dots. The evaluation unit 6 of the energy meter 1 shown in the exemplary embodiment of Figure 1 is further configured to use the received data on the energy composition Ei, E2, ... E to determine the energy composition. nand, based on the determined energy drawn from the electrical network 2 and the specified second allocation rule ZV2, to calculate an emission quantity of a second substance incurred in generating the determined energy and to also provide this calculated emission quantity of the second substance via the communication unit 4, in particular to send it to the central unit 10. The first and second substances are different from each other and correspond either to a CO2 equivalent or to an air pollutant. Depending on the specific application and the need for emission quantities of different substances to be analyzed, it may also be provided that the energy meter, by means of its evaluation unit 6, calculates an emission quantity of a third, fourth, etc. substance incurred in generating the determined energy based on a specified third, fourth, etc. allocation rule.can calculate the substance and provide the calculated emission quantity via communication unit 4.

[0039] As shown in Figure 1, the energy meter 1 also has a display unit 8 electrically connected to the evaluation unit 6. The evaluation unit 6 is configured to transmit the calculated emission quantity of the first substance, and in particular also the respective calculated emission quantities of the other substances to be analyzed, such as the second, third, and / or fourth substance, to the display unit 8. Furthermore, the evaluation unit 6 is also configured to transmit the determined energy or quantity of energy drawn from the electrical network 2 to the display unit 8. The display unit 8, in turn, is configured to display the determined energy drawn from the electrical network 2 and the corresponding calculated emission quantity of the first substance, and in particular also the corresponding calculated emission quantity of the other substances to be analyzed, such as the second, third, and / or fourth substance.to represent the second, third and / or fourth substance. This representation is primarily visual, e.g., by displaying a specific numerical value, a diagram, or a graph.

[0040] Figure 7 shows a schematic representation of the work steps carried out within an energy measuring device 1' according to a second embodiment of the invention, compared with the work steps of a standard energy measuring device. The work steps shown with dashed lines represent the work steps of an energy measuring device according to the prior art. An input measurement, for example, power, is measured, represented by S1, and the measurement is processed according to S2. After a time accumulation of the measurement, represented in Figure 7 by S3, the amount of energy resulting from the time-accumulated measurement is determined, represented by S4, and finally, the correspondingly determined amount of energy is output S5, e.g.By displaying the energy meter 1 using a display unit 8. In contrast, the work steps S3' and S4', represented by a solid line, are performed by the energy meter 1 ' ' according to the invention instead of work steps S3 and S4. In Figure 7, the energy meter 1 ' receives, by way of example, information 27 via its communication unit, wherein this information 27 includes the time-dependent data on the energy composition as well as at least data relating to the first allocation rule. Based on this information 27, in work step S3', a temporal accumulation of the emission quantity of the first substance takes place with respect to the respective time-dependent measured values, for example, the respective power measured values. In work step S4', an emission quantity of the first substance is determined, in particular calculated, with respect to the total amount of energy consumed.This determined emission quantity of the first substance is provided via the communication unit of the energy measuring device 1 ', represented by S6, and can furthermore be output or displayed e.g. by means of the display unit 8 of the energy measuring device 1 ', according to S5.

[0041] Figure 2 shows a schematic representation of a system 20 according to a first embodiment of the invention, wherein the system 20 comprises a plurality of energy meters 1a, 1b, 1c, each connected to an electrical network 2a, 2b, 2c, for determining the energy consumption of an electrical load 3 (not shown in Figure 2) connected to each energy meter 1a, 1b, 1c, and a central unit 10. The respective energy meters 1a, 1b, 1c shown in Figure 2 are constructed according to the energy meter 1 shown in Figure 1 and can therefore each have features as already described with regard to the energy meter 1 shown in Figure 1. Accordingly, the same reference numerals are used for the same terms, and a representation of the internal structure of the energy meters 1a, 1b, 1c has been omitted in Figures 2 and 3 for the sake of clarity of the respective system depicted.According to the energy meter 1 shown in Figure 1, each of the plurality of energy meters 1a, 1b, 1c comprises a communication unit 4, a measuring unit 5 configured to measure a current flowing through the respective energy meter 1a, 1b, 1c and / or a voltage applied to the respective energy meter 1a, 1b, 1c, and an evaluation unit 6 electrically connected to the measuring unit 5 and the communication unit 4, which is configured to determine energy drawn from the respective electrical network 2a, 2b, 2c based on the measured current and / or the measured voltage. As can be seen in Figure 2, the central unit 10 is in communication communication 9 with each of the plurality of energy meters 1a, 1b, 1c via the respective communication unit 4. According to Figure 2, the central unit 10 is configured by way of example as a central control unit and has, among other things,An administrative function with regard to energy consumption and the resulting amount of emissions. Alternatively, the central unit 10 could also be designed, for example, as a central server.

[0042] As indicated by the arrow in Figure 2, the central unit 10 is designed to provide each of the plurality of energy measuring devices 1a, 1b, 1c with data on the energy composition Ei, E2, E nto provide the energy drawn from the respective electrical networks 2a, 2b, 2c. It should be noted that in the embodiment shown in Figure 2, the respective electrical networks 2a, 2b, 2c are each different electrical networks, each providing energy with a different energy composition. Accordingly, in Figure 2, at least one first energy meter 1a of the plurality of energy meters is connected to a first electrical network 2a, and at least one second energy meter 1b of the plurality of energy meters is connected to a second electrical network 2b, which is different from the first electrical network 2a. In particular, Figure 2 also shows a third energy meter 1c of the plurality of energy meters being connected to a third electrical network 2c, the third electrical network 2c being different from the first and second electrical networks 2a, 2b.However, in an alternative embodiment, electrical networks 2a, 2b, 2c could also be the same electrical network, or only two of the three electrical networks could be identical. In particular, electrical networks 2a, 2b, 2c could be electrical networks available at different production sites.

[0043] Each of the majority of energy meters 1a, 1b, 1c is configured to measure the provided data on the energy composition Ei, E2, .. E nEach energy measuring unit 4 receives data on the energy composition and the energy extracted from the respective electrical network 2a, 2b, 2c. Using its own communication unit 6, the unit calculates, based on a predefined first allocation rule ZVI, the emission quantity of a first substance generated during the production of the energy extracted from the electrical network. This calculated emission quantity of the first substance is then transmitted via its own communication unit 4 to the central unit 10. In other words, each energy measuring unit 1a, 1b, 1c independently determines the emission quantity of the first substance released during the production of the energy extracted from the electrical network, based on the provided information on the energy composition of this energy and on the first allocation rule stored, in particular, in the energy measuring unit 1a, 1b, 1c.Thus, in addition to the measured value of the energy or amount of energy drawn from the electrical grid, each energy meter also provides the corresponding emission quantity related to at least the first substance. The first substance is an environmentally impacting or even polluting substance and can be, for example, a CO2 equivalent, a greenhouse gas such as CO2, or an air pollutant such as particulate matter or heavy metals.

[0044] After receiving the respective calculated emission quantities of the first substance from each of the plurality of energy measuring devices 1a, 1lb, 1c, e.g., after completion of a product or after the end of a day, the central unit 10 is configured to calculate a total emission quantity of the first substance from the emission quantities received, i.e., in particular, to add the emission quantities received to obtain a total emission quantity of the first substance. This total emission quantity may, for example, be the total emission quantity of the first substance emitted to generate the energy required to manufacture a product, or the total emission quantity of the first substance emitted to generate the energy required within a specific period, e.g., a day.

[0045] The system 20 shown in Figure 2 is thus suitable for determining the quantity of emissions of a first substance incurred in the generation of energy. The system 20 shown in Figure 2 represents, by way of example, interconnected infrastructures distributed across several production sites. The energy measuring devices 1a, 1b, 1c are thus located, by way of example, at different production sites, as shown in Figure 2. It is understood that each of the energy measuring devices 1a, 1b, 1c can also represent a plurality of energy measuring devices, each of which metrologically monitors a production step and whose evaluation results with regard to the energy consumed and the resulting quantity of emissions are then summarized and transmitted, for example, to the central unit 10. Such a production step could, for example, be...The production of a component of a product at a production site, where the product itself is manufactured at one or more production sites. In such a system 20, as outlined in Figure 2, the emission quantity of the first substance already varies due to the use of different types or forms of energy and, if applicable, the use of self-generated renewable energy. By using energy meters 1, 1a, 1b, 1c according to the invention and a central unit 10 designed according to the invention, as described above, the system 20 advantageously allows for inferences to be drawn about the emission quantity of the first substance, for example, the emission quantity of a CO2 equivalent as the first substance, throughout the entire value creation process of a product. This makes it possible to determine, in a simplified manner, the emission quantity of a predetermined substance, such as a CO2 equivalent, and thus, for example, a so-calledDetermining the CO2 footprint, among other things, for the production of goods and the operation of buildings. In particular, the balance of emitted substances, such as a CO2 balance, of distributed buildings or production areas that are operated with different energy mixes, e.g., due to self-generated energy from renewable energies, can be analyzed more easily within the system 20 according to the invention, as shown, for example, in Figure 2.

[0046] As already described with regard to the energy measuring device 1 sketched in Figure 1, the given first allocation rule can be used, in particular by at least one conversion factor, and in particular by several conversion factors, to calculate a respective specific emission quantity of the first substance as a function of a respective energy form, which according to the data on the energy composition Ei, E2, .. E nThe energy extracted is defined as being included in the energy. Additionally or alternatively, each of the plurality of energy measuring devices 1a, 1b, 1c can further comprise a storage device 7, which is electrically connected to the evaluation unit 6 of the respective energy measuring device 1a, 1b, 1c or is designed as a component of the evaluation unit 6 of the respective energy measuring device 1a, 1b, 1c and in which at least the first allocation rule is stored. For example, the first allocation rule can be stored in the form of at least one table. Furthermore, each energy measuring device 1a, 1b, 1c of the plurality of energy measuring devices can, for example, be configured to store the first allocation rule together with the corresponding data on the energy composition Ei, E2, ... E nThe information is received via the respective communication unit 4 and then processed in the evaluation unit 6 of the respective energy measuring device 1a, 1b, 1c to determine or calculate the emission quantity of the first substrate based on the previously determined energy extracted from the respective electrical network 2a, 2b, 2c. For example, the central unit 10 can be configured to send or transmit the first allocation rule together with the respective energy composition data to a respective energy measuring device 1a, 1b, 1c, or the respective energy measuring device 1a, 1b, 1c can be configured to retrieve the first allocation rule together with the respective energy composition data independently from the central unit 10 or a database.

[0047] As outlined in Figure 2, the central unit 10 of the system 20 includes, by way of example, a storage device 17. This storage device 17 contains the data on the energy composition Ei, E2, ... E n as shown in Figure 2, and in particular as a function of the respective electrical network 2a, 2b, 2c from which the energy was drawn, i.e., as network-specific data on the energy composition, and as a function of the respective time of energy withdrawal from the respective electrical network 2a, 2b, 2c. The central unit 10 can store the data on the energy composition Ei, E2, . . E n e.g., received from a database 30, in particular retrieved from database 30, as shown by way of example in Figure 2. The data on the energy composition Ei, E2, .. E nThis includes information on the percentage shares of each energy form contained in the energy drawn from the respective electrical grids 2a, 2b, 2c. The energy drawn from each electrical grid 2a, 2b, 2c includes, in particular, at least one of the following energy forms: wind energy, solar energy, nuclear energy, and energy generated from biomass, hydropower, lignite, hard coal, and natural gas. As shown by way of example in Figure 2, the energy drawn from at least one of the respective electrical grids 2a, 2b, c is composed of 27% wind power, 10.4% photovoltaics, 9.3% biomass, 3.7% hydropower, 16.8% lignite, 7.3% hard coal, 12.5% ​​nuclear energy, and 12.1% natural gas. The respective energy measuring devices 1a, 1b, 1c of system 20 are configured, as shown in Figure 2, to record the corresponding data on the energy composition Ei, E2, ... E nThe energy drawn from the respective electrical networks 2a, 2b, 2c is updated at regular intervals and received from the central unit 10 via its respective communication unit 4 and stored in its respective evaluation unit 6 or storage device 7. In a further embodiment, the corresponding energy composition data can also be transmitted continuously, i.e., in real time, from the central unit 10 to the respective energy meters 1a, 1b, 1c. In the embodiment shown in Figure 2, the central unit 10 sends the corresponding energy composition data to 1i, 1b, 1c. n actively to the respective energy measuring devices 1a, 1b, 1c. In an alternative embodiment, however, it is also conceivable that the respective energy measuring devices 1a, 1b, 1c retrieve this data on the energy composition independently from the central unit 10 or a database 30.

[0048] In an alternative embodiment, for example, one or more of the plurality of energy measuring devices 1a, 1b, 1c can be configured to receive the data on the energy composition of the energy drawn from the respective electrical network once via the communication unit 4 and to store this received data in the storage device 7. As already mentioned, this is particularly advantageous for applications in which the energy composition of the energy drawn from the electrical network does not change over time, i.e., remains constant. Furthermore, the respective energy measuring device 1a, 1b, 1c can also receive the data on the energy composition of the energy drawn from the respective electrical network once via the communication unit 4, together with the specified first allocation rule, and store the received information in the storage device 7.

[0049] As already described with regard to the energy meter 1 shown in Figure 1, each of the plurality of energy meters 1a, 1b, 1c of the system can further comprise a display device 8 electrically connected to the evaluation unit 6 of the respective energy meter, as indicated in Figure 2. The evaluation unit 6 of the respective energy meter 1a, 1b, 1c is then configured to transmit the determined emission quantity of the first substance, and optionally also a calculated emission quantity of one or more further substances to be analyzed, such as a second, third and / or fourth substance, as well as, in particular, the energy or quantity of energy drawn from the electrical network 2a, 2b, 2c determined by the respective energy meter 1a, 1b, 1c, to the display device 8. The display device 8, in turn, is configured accordingly to display this transmitted information, i.e., the determined energy drawn or quantity of energy.to represent the amount of energy and the calculated amount of emission corresponding to this energy, in particular visually, e.g. in the form of a concrete numerical value, as is the case in Figure 2, or also a diagram or a graph.

[0050] Figure 3 shows a schematic representation of a system 20' according to a second embodiment of the invention. System 20' essentially corresponds to system 20 sketched in Figure 2 and differs from it, among other things, by a slightly different application and / or by having a different structure or topology. While the system shown in Figure 2 relates to the multi-site production of products, system 20' sketched in Figure 3, in addition to multi-site product production, also relates to the energy management of buildings, in particular office spaces. The energy meter 1a included in system 20' is, in the illustrated embodiment, assigned to a first production line 24 and is configured to determine the energy drawn from the electrical network 2a that has been consumed by the first production line 24.Using the first production line 24, for example, a first product or several products, e.g., a first and a second product, can be manufactured, with the production of the respective products occurring at different times. Furthermore, the energy measuring device 1a is configured to determine the time-accumulated emission quantity of a first substance that has been emitted to generate the energy consumed within the first production line 24, and in particular within a predetermined time. The energy measuring device 1b, comprised of the system 20', is assigned to a second production line 25 in the illustrated embodiment and is configured to determine the energy drawn from the electrical network 2b that has been consumed by the second production line 25.For example, the second production line 25 can include the production of a third product, or even the production of several other products. Furthermore, the second production line 25 can, for example, operate within a time interval during which production line 1 is idle. In addition, the energy measuring device lb is configured to determine the time-accumulated emission quantity of a first substance that has been emitted to generate the energy consumed within the second production line 25, and in particular within a predetermined time.In the embodiment shown in Figure 3, the energy measuring devices 1a and 1lb each receive information 28 from the central unit 10 of the system 20' via their respective communication units. This information consists of data on the energy composition of the energy drawn from the respective electrical networks 2a and 2b at the time of energy withdrawal, and of the first allocation rule. The energy measuring device 1c, which is part of the system 20', is configured to determine the total energy consumption of the production process, i.e., including the first production line 24 and the second production line 25, within a predetermined time or time interval, and to determine the resulting emission quantity of the first substance from this total energy consumption.Optionally, the energy meter 1c can also be configured to additionally determine the energy drawn from another electrical network 2c and the resulting, time-accumulated emission quantity of the first substance, and to include this in the calculation of the total emission quantity of the first substance generated during production. Furthermore, the system 20' includes the energy meter Id, which is configured to determine the energy consumption required for operating buildings, offices, etc., and which has been drawn from an electrical network 2d within a predetermined time or time interval, and to determine a corresponding emission quantity of the first substance for this determined energy consumption. The emission quantities determined accordingly by the energy meters 1c and Id are transmitted to the central unit 10, which is shown in Figure 3 as an example of the central orThe higher-level control system or the higher-level control system transmits, in particular sends, e.g. after a corresponding request by the central unit 10.

[0051] In contrast to the embodiment of system 20 shown in Figure 2, the central unit 10 of system 20' is configured to access a database 30 at regular intervals, represented by the arrow marked with reference numeral 29. The database 30 contains the corresponding energy composition data Ei, E2, E assigned to each electrical network 2a, 2b, 2c, 2d. n are stored in a time-dependent manner, and these time-dependent data on energy composition (Ei, E2, .. E) n) to be downloaded to a storage facility 17 encompassed by the central unit 10. The regular time intervals are predefined or fixed. For example, this can take the form of a daily or even hourly data query, e.g., from the Federal Network Agency. Furthermore, a continuous data query, i.e., a real-time data query, can also be performed, e.g., from the Federal Network Agency. In addition to the relevant energy composition data, the allocation rule can also be transmitted as part of the data query. In particular, information 28 can be downloaded from the database 30 by the central unit 10 via a data query, whereby this information consists of the time-dependent energy composition data and data concerning the first allocation rule.An example of such information is shown in Figure 5, which presents a sample table with data on energy composition, including the first allocation rule for calculating CO2 emissions. In this example, the first substance is carbon dioxide (CO2). For instance, the table shown in Figure 5 can be provided as a data basis to the respective energy meters 1a, 1b, 1c, and 1d shown in Figure 3 by the central unit 10, provided that the emission quantity of the first substance to be calculated by the energy meters 1a, 1b, 1c, and 1d relates to the quantity of CO2 emissions. The table values ​​shown in Figure 5 indicate how many grams of CO2 are released as emissions per kWh of energy generated by a specific electrical grid, depending on the season and time of day.The table values ​​thus include both information on the energy composition of the energy supplied by the electrical network and an allocation rule with corresponding conversion factors, by means of which a corresponding amount of CO2 emitted during the energy generation of the respective energy form can be calculated for a standardized amount of energy of a respective energy form that is included in the energy supplied by the electrical network.

[0052] Figure 4 shows a schematic representation of a system 20" according to a third embodiment of the invention, which differs from the system 20' shown in Figure 3 in that the central unit 10', instead of a central server in Figure 4, is now designed as an external data source, e.g., in the form of a data cloud. In contrast to the embodiment shown in Figure 3, the energy meters 1a, 1b, 1le, 1d of the system 20" are configured to receive information via their respective communication units, by each independently downloading this information 27, e.g., from the central unit 10 of the system 20' acting as an external data source or from another database.This information 27 comprises the time-dependent data on the energy composition of the energy drawn from the respective electrical network 2a at the time of energy withdrawal, and furthermore, in particular, information concerning the first allocation rule. As already noted with regard to Figure 3, this information 27 can, for example, comprise the table shown in Figure 5. The energy measuring devices 1a, 1b, 1c, and 1d can, for example, download this information 27 at regular intervals or continuously from the external data source or another database.

[0053] Figure 6 shows a schematic representation of a method within a system according to Figure 2, 3, or 4, according to a first embodiment of the invention. Within the framework of the method, according to Block A shown in Figure 6, the amount of energy drawn from an electrical network to supply an electrical load is determined by one of the multiple energy meters in the system. An electrical load can be, for example, a machine for manufacturing a component of a product within a production line, or an electrical load in a building, such as a server, a computer, a heating system, etc. According to Block B shown in Figure 6, data on the energy composition of the respective energy drawn from the electrical network is provided.This provision can be carried out in different ways, as already described with regard to the systems 20, 20', 20" shown in Figures 2, 3 and 4 respectively. According to Block B1, the data on the energy composition of the respective energy drawn from an electrical network can be provided in the central unit and / or in a database and received by one or more energy meters and stored in that energy meter. Alternatively or additionally to Block B1, the data on the energy composition of the respective energy drawn from an electrical network can be updated at regular intervals by the central unit from a database or downloaded directly by a respective energy meter and stored accordingly, according to Block B2.It is also possible for individual energy meters to download the previously described information independently from the central unit, while other energy meters receive the corresponding information from the central unit, either automatically or upon request from the respective energy meters. The chronological order of carrying out steps A and B of the procedure can be chosen arbitrarily.

[0054] According to the block marked C, a respective emission quantity is calculated, specifically, according to reference numeral CI, an emission quantity of at least one substance, whereby this emission quantity is generated for the production of the respective energy drawn from an electrical grid. The calculation is performed using the provided data on the energy composition and the respective energy drawn, based on a predefined first allocation rule by a respective energy meter. Furthermore, an additional calculation of a respective emission quantity of a second substance, represented by reference numeral C2, can be performed. This is also based on the provided data on the energy composition, the respective energy drawn, and a predefined second allocation rule by a respective energy meter. Optional calculation of emission quantities of other substances is also possible.Based on correspondingly specified further allocation rules, this is represented by the reference symbol Ci in Figure 6. For example, the energy composition data, together with the respective allocation rule, i.e., the specified first allocation rule and optionally also the second allocation rule, etc., can be received by the respective energy measuring devices.

[0055] Following the calculation steps performed in the respective energy meters to determine the emission quantity of at least one substance, the calculated emission quantity of each substance is transmitted from each energy meter to the central unit, as shown in block D in Figure 6. Specifically, reference numeral D1 represents the transmission of the calculated emission quantity of the first substance. Depending on the application, a corresponding optional transmission of calculated emission quantities of a second substance, represented by reference numeral D2, or of further substances, represented by reference numeral Di, to the central unit may also be provided. Finally, according to the procedure outlined in Figure 6, the total emission quantity is calculated, as shown in block G, specifically the total emission quantity of at least one substance, symbolized by reference numeral Eq.This calculation is performed by the central unit using the calculated emission quantities of the first substance, i.e., based on the emission quantities of the first substance transmitted to the central unit by the respective energy meters and calculated accordingly. Furthermore, the central unit can optionally calculate the total emission quantity of the second substance from the calculated emission quantities of the second substance, as represented by reference symbol G2 in Figure 6. If emission quantities of other substances have also been determined by the respective energy meters and transmitted to the central unit, the central unit can further determine the total emission quantity of these other substances based on this transmitted information, as represented by reference symbol Gi.

[0056] Optionally, according to the method outlined in Figure 6, it can also be provided that a display of the respective energy drawn from an electrical network, as well as a display of the corresponding measured emission quantity of the first substance, represented by reference numeral Fl, and optionally also of the second substance (reference numeral F2) and / or further substances (reference numeral Fi), is carried out by a respective energy meter of the plurality of energy meters. This is illustrated in Figure 6 by the dashed block F. This allows the emission quantity generated for the generation of the respective consumed energy to be directly identified on-site at each energy withdrawal point.

[0057] The present invention thus relates, in summary, to an energy meter, a system comprising a plurality of energy meters and a central unit communicating with them, and a method, each of which is suitable for determining an emission quantity of at least a first substance incurred in the generation of energy drawn from an electrical network. Based on information concerning the respective energy composition of the energy drawn from an electrical network, also known as the energy mix, and information concerning the allocation of an emission quantity of the first substance to a standardized energy quantity of a respective energy form contained in the energy drawn from the electrical network, a respective energy meter can advantageously determine, in addition to the energy drawn from the electrical network, the emission quantity of at least a first substance.Furthermore, the amount of energy can also be determined, along with the corresponding amount of emissions from the first substance. The first substance can be, in particular, a CO2 equivalent, a greenhouse gas (e.g., CO2), or an air pollutant (e.g., particulate matter or heavy metals) released during energy generation in coal-fired power plants, and can be predetermined depending on the application. The present invention makes it possible, in particular, to determine emission quantities during the production process of a specific product or the operation of buildings and building complexes. This is especially relevant given that products typically consist of various components, which are usually manufactured at different production sites where, at different times, electricity is drawn from potentially different electrical grids or...Since energy is drawn from energy sources, the present invention can make an important contribution to determining the total amount of emissions ultimately generated during the production of the product. For example, within the framework of the system according to the invention, energy measuring devices according to the invention can be used at the different production sites for each production line. These devices determine and, if necessary, display not only the amount of energy consumed but also the corresponding amount of emissions from a first substance, and optionally from a second, third, etc. substance. Thus, when the method according to the invention is implemented, the system according to the invention provides a data set on the basis of which the total amount of emissions from the first substance for the production of the product can be determined. Similarly, for example,Generate statistics on emissions from energy consumption for production lines, departments, floors, buildings, locations, and the entire company.

[0058] Reference symbol list

[0059] 1, la, lb, 1c, Id Energy Meter

[0060] 2, 2a, 2b, 2c, 2d electrical network

[0061] 3 electrical consumers

[0062] 4 Communication unit

[0063] 5 Unit of measurement

[0064] 6 evaluation unit

[0065] 7 Storage setup

[0066] 8 Display unit

[0067] 9 Communication link

[0068] 10, 10' central unit

[0069] 17 Storage device

[0070] 20, 20', 20" system

[0071] 24 first production line

[0072] 25 second production line

[0073] 27 Information

[0074] 28 Information

[0075] 29 Accessing the database

[0076] 30 database

[0077] El, E2, ..., En Data on energy composition

[0078] ZV1, ZV2 first, second allocation rule

[0079] 51 Measuring an input quantity

[0080] 52 Processing the measured value

[0081] 53. Temporal accumulation of the measured quantity

[0082] 54 Determining an amount of energy

[0083] S3' temporal accumulation of the emission quantity of the first substance

[0084] S4' Determining the emission quantity of the first substance

[0085] 55 Outputting previously determined values

[0086] 56 Provision of the emission quantity of the first substance via communication unit

[0087] A. Determining energy consumption B. Providing data on energy composition

[0088] Bl Receiving and storing data on energy composition

[0089] B2 Download, save updated data for

[0090] Energy composition C Calculating an emission quantity

[0091] Calculate the emission quantity of Cl, C2, Ci of the first, second, and i-th substance.

[0092] D. Transmitting the calculated emission quantity to the central unit

[0093] D1, D2, Di transmit the emission quantity of the first, second, i-th substance to the central unit G; calculate a total emission quantity

[0094] Gl, G2, Gi Calculate the total emission quantity of the first, second, i-th

[0095] substance

[0096] F Displaying an emission quantity

[0097] F1, F2, Fi Display emission quantity of first, second, i-th substance

Claims

Patent claims 1. Energy measuring device (1), which can be connected to an electrical network (2) and, when connected, is designed to determine the energy consumption of an electrical consumer (3) connected to the energy measuring device (1), comprising - a communication unit (4) via which the energy meter (1) can be coupled to a central unit (10) for sending and / or receiving data, - a measuring unit (5) designed to measure a current flowing through the energy measuring device (1) and / or a voltage applied to the energy measuring device, - an evaluation unit (6) which is electrically connected to the measuring unit (5) and the communication unit (4) and is designed to determine energy drawn from the electrical network (2) based on the measured current and / or the measured voltage, wherein the energy measuring device (1) is designed to transmit data on the energy composition (E1, E2, ... E) via the communication unit (4). n ) of the energy drawn from the electrical network (2), and wherein the evaluation unit (6) is designed to use the data on the energy composition (Ei, E2, E) to n) and, based on the determined extracted energy and a given first allocation rule (ZVI), to calculate an emission quantity of a first substance incurred for the generation of the determined energy and to provide the calculated emission quantity of the first substance via the communication unit (4), in particular to send it to a central unit (10, 10').

2. Energy measuring device (1) according to claim 1, wherein the first allocation rule (ZVI) is modified by at least one conversion factor, in particular by several conversion factors, to calculate a respective specific emission quantity of the first substance as a function of a respective energy form, which according to the data on the energy composition (Ei, E2, .. E n ) is included in the extracted energy, is defined.

3. Energy measuring device (1) according to claim 1 or 2, wherein the energy measuring device (1) further comprises a storage device (7) which is electrically connected to the evaluation unit (6) or is designed as a component of the evaluation unit (6) and in which at least the first allocation rule (ZVI) is stored, wherein the first allocation rule (ZVI) is stored in particular in the form of at least one table.

4. Energy measuring device (1) according to claim 3, wherein the energy measuring device (1) is configured to record the data on the energy composition (E, E2, .. E n ) the energy extracted from the electrical network (2) is received once via the communication unit (4) and the received data on the energy composition (Ei, E2, E n ) to be stored in the storage device (7).

5. Energy measuring device (1) according to any one of claims 1 to 3, wherein the energy measuring device (1) is configured to record the data on the energy composition (Ei, E2, . . E n ) the energy drawn from the electrical network (2) is updated at regular intervals, in particular in real time, to be received via the communication unit (4), in particular to be retrieved independently from a database or from the central unit (10), and to be stored in the evaluation unit (6) or a storage device (7) of the energy measuring device (1).

6. Energy measuring device (1) according to any one of claims 1 to 5, wherein the energy measuring device (1) further comprises a display device (8), wherein the evaluation unit (6) is configured to transmit the calculated emission quantity of the first substance to the display device (8), and the display device (8) is configured to display the calculated emission quantity of the first substance, and / or wherein the first substance corresponds to a CO2 equivalent or an air pollutant, in particular particulate matter or heavy metal.

7. Energy measuring device (1) according to any one of claims 1 to 6, wherein the evaluation unit (6) is further configured to determine, on the basis of the data on the energy composition (Ei, E2, . . E n) and, based on the determined extracted energy and a given second allocation rule (ZV2), to calculate an emission quantity of a second substance incurred for the generation of the determined energy and to further provide the calculated emission quantity of the second substance via the communication unit (4), in particular to send it to the central unit (10), wherein the first substance and the second substance are different from each other and correspond either to a CO2 equivalent or to an air pollutant.

8. System (20, 20', 20"), in particular for determining an emission quantity of a first substance incurred in the generation of energy taken from an electrical network, comprising - a plurality of energy measuring devices (1a, 1b, 1c, 1d) each connected to an electrical network (2a, 2b, 2c, 2d) for determining the energy consumption of an electrical consumer (3) connected to each energy measuring device (1a, 1b, 1c, 1d), in particular according to one of claims 1-7, wherein each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) - a communication unit (4), - a measuring unit (5) designed to measure a current flowing through the respective energy measuring device (1a, 1b, 1c, 1d) and / or a voltage applied to the respective energy measuring device (1a, 1b, 1c, 1d), and - an evaluation unit (6) electrically connected to the measuring unit (5) and the communication unit (4), which is designed to determine energy drawn from the respective electrical network (2a, 2b, 2c, 2d) on the basis of the measured current and / or the measured voltage, and - a central unit (10, 10') in communication connection (9) with each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) via the respective communication unit (4), wherein the central unit (10, 10') is configured to transmit data on the energy composition (Ei, E2, ..., to each of the plurality of energy measuring devices (1a, 1b, 1c, 1d). E n ) to provide the energy taken from the respective electrical network (2a, 2b, 2c, 2d), wherein each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) is set up to - the provided data on energy composition (Ei, E2, . . E n ) to receive via its own communication unit (4), - based on the data on energy composition (egg, E2, ... E n) and, based on the energy extracted in each case, using the respective evaluation unit (6) based on a given first allocation rule (ZVI), to calculate an emission quantity of a first substance that was generated for the production of the energy determined in each case and - to send the calculated emission quantity of the first substance via its own communication unit (4) to the central unit (10, 10'), wherein the central unit (10) is configured to receive the calculated emission quantity of the first substance from each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) and to calculate a total emission quantity of the first substance from the emission quantities received.

9. System (20, 20', 20") according to claim 8, wherein the first allocation rule (ZVI) is modified by at least one conversion factor, in particular by several conversion factors, to calculate a respective specific emission quantity of the first substance depending on a respective energy form determined according to the energy composition data (Ei, E2, ..., E n ) is included in the extracted energy, is defined, and / or wherein each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) further comprises a storage device (7) which is electrically connected to the evaluation unit (6) of the respective energy measuring device (1a, 1b, 1c, 1d) or is designed as a component of the evaluation unit (6) of the respective energy measuring device (1a, 1b, 1c, 1d) and in which at least the first allocation rule (ZVI) is stored, wherein the first allocation rule (ZVI) is stored in particular in the form of at least one table.

10. System (20, 20') according to one of claims 8 or 9, wherein the central unit (10) comprises a storage device (17), and - the data on energy composition (egg, E2, ..., E n ) are stored in the storage unit (17), in particular depending on the respective electrical network (2a, 2b, 2c, 2d) from which the energy has been taken, and depending on the respective time of withdrawal of the energy from the respective electrical network (2a, 2b, 2c, 2d), and / or - the central unit (10) is designed to access (29) a database (30) at regular intervals, in which data on the energy composition (Ei, E2, . .., E) for a respective electrical network (2a, 2b, 2c) are stored. n ) are stored in a time-dependent manner, and these time-dependent data on energy composition (Ei, E2, ..., E) n ) to download to the storage device (17).

11. System (20, 20', 20") according to any one of claims 8 to 10, wherein each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) is configured to record the data on the energy composition (Ei, E2, ..., E n ) the energy extracted from the respective electrical network (2a, 2b, 2c, 2d) is either received once via the communication unit (4) and the received data on the energy composition (Ei, E2, ..., E n ) to store in the storage device (7), or the data on the energy composition (Ei, E2, ..., E n ) the energy drawn from the respective electrical network (2a, 2b, 2c, 2d) is updated at regular intervals, in particular in real time, to be received via the communication unit (4), in particular to be retrieved independently from a database (30) or from the central unit (10') and stored in the evaluation unit (6) or a storage device (7) of the respective energy measuring device (1a, 1b, 1c, 1d).

12. System (20, 20', 20") according to any one of claims 8 to 11, wherein each of the plurality of energy measuring devices (1a, 1b, 1c, 1d) further comprises a display device (8), wherein the evaluation unit (6) of a respective energy measuring device (1a, 1b, 1c, 1d) is configured to transmit the determined emission quantity of the first substance to the to transmit to the display device (8), and the display device (8) is configured to display the determined emission quantity of the first substance.

13. Method, in particular for determining an emission quantity of a first substance incurred for the generation of energy, within a system (20, 20', 20") comprising a plurality of energy measuring devices (1a, 1b, 1c, 1d) each connected to an electrical network (2a, 2b, 2c) and a central unit (10, 10') which is in communication connection (9) with each of the plurality of energy measuring devices (1a, 1b, 1c, 1d), in particular within a system (20, 20', 20") according to any one of claims 8 to 12, comprising the following steps: - Determining (A) the energy taken from an electrical network (2a, 2b, 2c, 2d) to supply an electrical consumer (3) by means of a respective energy measuring device (1a, 1b, 1c, 1d) of the plurality of energy measuring devices (1a, 1b, 1c, 1d), - Providing (B) data on energy composition (Ei, E2, . .., E n) the respective energy taken from an electrical network (2a, 2b, 2c, 2d), - Calculating (CI) the respective emission quantity of a first substance that was used to generate the respective energy extracted from an electrical network (2a, 2b, 2c, 2d), based on the provided data on the energy composition (Ei, E2, ..., E n ) and based on the energy extracted in each case, according to a given first allocation rule (ZVI) by a respective energy measuring device (1a, 1b, 1c, 1d) of the majority of energy measuring devices, - Transmitting (Dl) the calculated respective emission quantity of the first substance from each energy measuring device (la, 1b, 1c, Id) of the plurality of energy measuring devices to the central unit (10, 10'), - Calculating (Eq) a total emission quantity of the first substance from the calculated respective emission quantities of the first substance by the central unit (10).

14. Method according to claim 13, wherein the data on the energy composition (Ei, E2, E) n ) of the respective energy extracted from an electrical network (2a, 2b, 2c, 2d) are provided in the central unit (10) and / or in a database (30) and are received by a respective energy meter (1a, 1b, 1c, 1d) of the plurality of energy meters and stored in a respective energy meter (1a, 1b, 1c, 1d) of the plurality of energy meters (Bl), and / or wherein the energy composition data (Ei, E2, E n ) the respective energy extracted from an electrical network (2a, 2b, 2c, 2d) is updated at regular intervals from a database (30) by the central unit (10) or directly by a respective energy meter (1a, 1b, 1c, 1d) of the majority of energy meters and is downloaded and stored accordingly (B2).

15. Method according to one of claims 13 or 14, further comprising the steps: - Calculating (C2) a respective emission quantity of a second substance, which was used to generate the respective energy taken from an electrical network (2a, 2b, 2c, 2d), based on the provided data on the energy composition (Ei, E2, E n ) and based on the energy extracted in each case, according to a given second allocation rule (ZV2), by a respective energy measuring device (1a, 1b, 1c, 1d) of the plurality of energy measuring devices, wherein the first substance and the second substance are different from each other and in particular correspond either to a CO2 equivalent or to an air pollutant, as well as - Transmitting (D2) the calculated respective emission quantity of the second substance from a respective energy measuring device (1a, 1b, 1c, 1d) of the plurality of energy measuring devices to the central unit (10, 10') and - Calculating (G2) a total emission quantity of the second substance from the calculated respective emission quantities of the second substance by the central unit (10, 10').

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