Patent Application
20210313809
The disclosure relates to a method for controlling an electrical installation having a plurality of electrical devices, to a control unit configured to carry out the method, and to an electrical installation having such a control unit.
Electricity tariffs for larger energy customers, for example commercial enterprises, generally have a maximum active power to be consumed and often also a minimum active power to be consumed. This is used for better planning of energy production. Exceeding the maximum active power and undershooting the minimum active power obtained from an AC voltage grid via a grid connection point are associated with increased energy costs for the energy customer.
Energy customers often operate an electrical installation comprising a regenerative energy production installation in combination with an energy storage system and electrical consumers. This makes it possible to supply the electrical consumers to the greatest possible extent within the predefined tolerances for the minimum and maximum active power to be obtained. Specifically, an excess of power which is produced within the installation and currently cannot be used by the electrical consumers is fed into the energy storage system and is buffered there. In contrast, when the power consumed overall by the consumers of the energy customer threatens to exceed the maximum active power to be obtained, power is drawn from the energy storage system. This limits a power obtained from the AC voltage grid via a grid connection point and supports a supply of the consumers when power below the maximum active power to be obtained is obtained from the grid.
Regulating such an electrical installation having a plurality of electrical devices, including at least one device which can be operated in an energy-producing manner, one device which can be operated in an energy-storing manner and/or one device which can be operated in an energy-consuming manner, is complex. The complexity increases with the number of different electrical devices within the installation. This is due to the fact that the regulation must take into account, on the one hand, individual device targets for the power flows of the individual devices and, on the other hand, an installation target for the power flow of the entire installation at the grid connection point at the same time. It is not expedient if, although the installation target is achieved, a device or individual devices severely fall(s) short of its/their individual device targets relative to other devices in the installation. Rather, it is desirable for both the installation target and the individual device targets of the individual devices of the installation to be achieved as well as possible for all devices of the installation.
The document DE 102015101738 A1 discloses a method for operating an energy production installation which, for the bidirectional exchange of an electrical exchange power, is connected to a public AC voltage grid via a grid connection point. The energy production installation comprises an energy production unit, an energy store and an electrical consumer. The electrical exchange power of the energy production installation at the grid connection point is adjusted to a desired value by controlling the energy production unit, the energy store and/or the consumer, which desired value is determined on the basis of a first target variable and a second target variable. In this case, the first target variable for the exchange power is predefined as a constant value and the second target value for the exchange power is predefined on the basis of at least one variable captured at the grid connection point.
The document DE 102016110716 A1 discloses a method for adaptively controlling a discharge power of a storage unit assigned to a system. The aim of the control is to limit electrical energy obtained from an energy supply grid via a grid connection point of the system within an averaging interval to a target value. For this purpose, the discharge power of the storage unit is controlled during the averaging interval on the basis of electrical energy already obtained at the current time in the averaging interval, a current time and the target value assigned to the averaging interval.
The disclosure is directed to a method for controlling an electrical installation having a plurality of electrical devices comprising a device which can be operated in an energy-producing manner, an electrical device which can be operated in an energy-storing manner and/or a device which can be operated in an energy-consuming manner. The method can be used to achieve both an installation target and individual device targets of the individual devices within the installation as well as possible. The disclosure is also directed to a control unit configured to carry out the method and an electrical installation having a plurality of electrical devices which can be operated differently, and such a control device.
The method according to the disclosure relates to control of an electrical installation having a plurality of electrical devices using a control unit. In this case, the plurality of devices and therefore the installation are connected to a public energy supply grid via a common grid connection point. The installation comprises at least one device which can be operated in an energy-producing manner, at least one device which can be operated in an energy-storing manner and/or one device which can be operated in an energy-consuming manner. The method has a first stage which is aimed at achieving an installation target PAnl,Soll for a power flow PAnl assigned to the installation at the grid connection point. The method also has a second stage which is aimed at achieving an individual device target PGer,Soll,i for a power flow PGer,i of each device i from the plurality of devices. In this case, the method comprises:
detecting the power flow PAnl of the installation at the grid connection point,
comparing the detected power flow PAnl of the installation with the installation target PAnl,soll. The method also comprises:
operating the method in the second stage if the detected power flow PAnl of the installation is within a tolerance range around the installation target PAnl,soll, with the result that each device achieves the individual device target PGer,Soll,i assigned to it in the best possible manner, and operating the method in the first stage if the detected power flow PAnl of the installation is outside the tolerance range around the installation target PAnl,soll, wherein the devices of the installation are regulated in the direction of achieving the installation target P Anl,soll, and wherein the regulation strives for the situation in which, for each device i of the plurality, a difference ΔPGer,i=PGer,Soll,i−PGer,i between the power flow PGer,i of the device and the respective individual device target PGer,Soll,i corresponds to a device-specific default value.
According to the application, the term “controlling the installation” should also be understood as meaning, for example, “regulating the installation”. An electrical device which can be operated in an energy-storing manner should be understood as meaning a device which can be operated both in an energy-releasing manner and in an energy-absorbing manner. The plurality n of devices may comprise two devices or a greater number of devices, that is to say n≥2. The power flow of each device PGer,i and the individual device target for the power flow PGer,Soll,i can in each case comprise an active power, a reactive power and/or an apparent power. A similar situation applies to the power flow of the installation PAni and the installation target for the power flow PAnl,soll. The installation target PAnl,Soll can, but need not necessarily, be in the center of the tolerance range. According to the disclosure, it is also possible for the installation target to correspond to a tolerance limit of the tolerance range.
In one embodiment the power flow of the installation PAnl corresponds to the sum of the power flows PGer,i of the devices according to equation 1:
P
Anl=Σi=inPGer,i (eq. 1)
The tolerance range around the installation target PAnl,Soll can be understood as meaning a permitted range, such that, when the power flow for the installation PAnl is within the tolerance range, the installation power does not require any correction.
In one embodiment, the individual devices i can control or adjust their respective individual device target PGer,Soll,i independently of one another within the tolerance range of the installation. In this case, the desired value to be adjusted by the respective device corresponds to the individual device target PGer,Soll,i. A regulator assigned to the respective device of the installation, in particular a proportional-integral regulator (PI regulator), operates with the aim of regulating an error in the power flow ΔPGer,i for each device i to 0 according to ΔPGer,i=PGer,Soll,i−PGer,i. In this case, the sum of the power flows PGer,i of the devices may not be equal to the installation target PAnl,soll, with the result that there is a deviation of the power flow PAnl of the installation from its desired value PAnl,soll. However, as long as this deviation is within the tolerance range, it is disregarded and is not taken into account when regulating the individual device targets PGer,Soll,i.
In contrast, if the power flow of the installation PAnl at the grid connection point is outside the tolerance range, it is necessary to correct the power flow PAnl of the installation in order to change it into the tolerance range again. In one embodiment all devices i of the installation participate in the correction of the power flow in a predefined manner according to the disclosure.
In particular, a modified desired value {tilde over (P)}Ger,soll,i can be generated for each device i of the installation on the basis of the relative proportion of the nominal power PGer,nom,i of the device i in the nominal power PAnl,nom of the installation, wherein the nominal power PAnl,nom corresponds to the sum PAnl,nom=Σi=1nPGer,nom,i of the nominal powers PGer,nom,i of the devices of the installation.
In one embodiment the desired value {tilde over (P)}Ger,Soll,i modified for the purpose of correcting the installation power can then be composed as follows according to equation 2:
In equation 2, the first summand PGer,Soll,i describes the individual device target for the power flow of the device i. This value is used if the installation power is in the tolerance range.
The second summand includes a first correction term which is used to distribute the installation error (PAnl,Soll−PAnl) among the individual devices i of the installation. For this purpose, a difference between the power flow PAnl of the installation and its installation target PAnl,Soll can be scaled using the relative proportion of the nominal device power PGer,nom,i in the nominal installation power PAnl,nom. The distribution of the installation error can therefore be advantageously scaled on the basis of the relative proportions of the respective nominal powers PGer,nom,i of the devices in the nominal power PAnl,nom of the installation.
The second summand also includes a second correction term which is used to distribute the deviations of the power flows PGer,i from the respective individual device targets PGer,Soll,i, which are summed overall across all devices i (with k=1 to n) of the installation, among the individual devices i of the installation. The second summand is used in the first stage of regulation in which the achievement of the installation target PAnl,Soll is prioritized over achieving the individual device targets PGer,Soll,i, wherein the installation target PAnl,Soll is to be adjusted using the devices i of the installation. In this case, it is possible—and generally also the case—that the devices cannot adjust their individual targets PGer,Soll,i at the expense of achieving the installation target PAnl,soll. Rather, for the devices of the installation, there is in each case a deviation from their individual device target, which is summed in the second correction term of the second summand. The deviation which is present overall i.e. summed—is then distributed among the individual devices of the installation.
The deviations of the individual devices i from their respective individual device targets are therefore controlled using the second summand, whereas the control unit controls the devices of the installation with the aim of together setting or adjusting the installation target PAnl,Soll of the installation. This prevents an individual device i or a plurality of individual devices i from having an uncontrolled and possibly excessive deviation from its/their individual device target relative to the other devices. For this purpose, the modified desired value {tilde over (P)}Ger,soll,i is calculated for each device i of the installation, wherein the power flow PGer,i of the respective device i is adjusted to the modified desired value {tilde over (P)}Ger,soll,i, that is to say PGer,i={tilde over (P)}Ger,soll,i. The method can therefore be used to set the situation in which a difference ΔPGer,i=PGer,Soll,i−PGer,i between the power flow PGer,i of the device and the respective individual device target PGer,Soll,i for each device i of the installation corresponds to a device-specific default value. Since the power flow PGer,i of the device i is adjusted to the modified desired value {tilde over (P)}Ger,soll,i according to PGer,i={tilde over (P)}Ger,soll,i in the first stage of the method, this is synonymous with the fact that, in a state in which the power flow PGer,i of the device i has been adjusted to its accordingly modified desired value {tilde over (P)}Ger,Soll,i, a difference between the modified desired value {tilde over (P)}Ger,soll,i and the individual device target PGer,Soll,i corresponds to a device-specific default value.
In one embodiment of the method, the device-specific default value for each device i of the installation may have an equal relative difference ΔPGer,i/PGer,nom,i, which also corresponds to an equal relative difference (PGer,Soll,i−{tilde over (P)}Ger,soll,i)/PGer,nom,i, based on a nominal power PGer,nom,i of the respective device. This results in devices of the installation with a high nominal power PGer,nom,i also having a great absolute deviation from their individual device target PGer,Soll,i, whereas devices with an only low nominal power PGer,nom,i also have only a small absolute deviation from their individual device target.
In an alternative embodiment, the device-specific default values may be selected in such a manner that, for at least one device of the installation, a relative difference ΔPGer,i/PGer,nom,i of the power flow based on a respective nominal power PGer,nom,i differs from the relative differences ΔPGer,k/PGer,Nom,k (with k≠i) of the other devices of the installation. In this case too, the power flow PGer,i of the device i corresponds to the modified desired value {tilde over (P)}Ger,soll,i and the difference ΔPGer,i=(PGer,Soll,i−PGer,i) corresponds to the equal difference (PGer,Soll,i−{tilde over (P)}Ger,soll,i). In addition, individual devices i within the installation can be controlled in such a manner that they better achieve their individual device target PGer,Soll,i, whereas the other devices k (with k≠i) have a greater deviation from their individual device target Ger,Soll,i. P Individual devices i within the installation can therefore be prioritized over other devices k as they approach their individual device targets PGer,Soll,i.
In one embodiment of the method, the relative differences ΔPGer,i/PGer,nom,i of the power flows from the individual device targets PGer,Soll,i can be adjusted using different weighting factors Xi assigned to the devices i. For example, the weighting factors Xi can be selected in such a manner that a relative difference of the power flow ΔPGer,i/PGer,nom,i, multiplied by the respective weighting factor Xi, assumes a constant value for each device i of the installation. In other words, it is possible to use an approach according to
It therefore follows in this case that as a device i better achieves its individual device target, the higher the weighting factor Xi of the corresponding device i. As an alternative to the above-mentioned approach, however, the weighting factors Xi can also be selected in such a manner that a low weighting factor results in the corresponding device i being brought closer to its individual device target PGer,Soll,i. This can be achieved, for example, using weighting factors which are reciprocal to the weighting factors Xi.
In one embodiment of the method, the individual device targets PGer,Soll,i of the individual devices i may vary or be varied over time. For example, the power flow of a bidirectionally operating battery inverter, as part of a device of the installation, may depend on a state of charge of a battery connected to the battery inverter on the input side, wherein the state of charge of the battery varies over time. Alternatively or additionally, the power flow of a photovoltaic (PV) inverter, as part of an electrical device of the installation, can vary over time, for example on account of thermal boundary conditions of the inverter. It can also vary as a result of a supply of the power flow into an energy supply grid connected to the installation being limited by the energy supply company.
A temporal variation in the individual device target PGer,Soll,i for the power flow of a device may be provided and/or temporally varied by the one device itself. This is the case in a battery inverter, for example, when its control itself ensures that a certain state of charge of the battery is complied with. In the case of the PV inverter as part of an electrical device, control of the PV inverter may cause a reduction in the individual device target PGer,Soll, for example on account of temperature measurements within the device.
Sometimes, it may be advantageous for the device targets PGer,Soll,i of individual devices i to not be provided by the devices themselves. Alternatively or additionally, the individual device target PGer,Soll,i of a device or the individual device targets PGer,Soll,i of a plurality of devices, optionally of all devices, therefore cannot be provided and/or temporally varied by the devices themselves, but rather by a superordinate energy management system. This is advantageous, in particular, when the device targets PGer,Soll,i depend on one another. It goes without saying that it is also possible for individual devices to determine their device targets PGer,Soll,i themselves, while the device targets PGer,Soll,i of other devices within the electrical installation are provided by the superordinate energy management system.
In a further embodiment of the method, the installation target PAnl,Soll and/or the tolerance band around the installation target PAnl,Soll may temporally vary. Such temporal variations may result on account of a state change of the energy supply grid. For example, properties of an AC voltage—for example a frequency and/or a voltage amplitude of the AC voltage—can indicate that there is an excess supply of electrical power in the energy supply grid. The installation can then react to such state changes of the energy supply grid in a grid-supporting manner and can control the exchange of power with the energy supply grid by varying the installation target PAnl,Soll and/or the tolerance band around the installation target PAnl,soll. For example, the installation target PAnl,Soll and/or the tolerance band around the installation target PAnl,Soll can be determined by detecting the frequency, voltage, active power and/or reactive power at the grid connection point and taking into account a characteristic curve, in particular an active power/frequency characteristic curve (P(f)), a reactive power/voltage characteristic curve (Q(U)), a reactive power/active power characteristic curve (Q(P)) and/or a phase shift/active power characteristic curve (cos_phi(P)).
As an alternative, or in addition to reacting to properties of the AC voltage in the energy supply grid, the installation target PAnl,Soll and/or the tolerance band around the installation target of the installation can also be directly communicated. Specifically, the installation target PAnl,Soll and/or the tolerance band around the installation target PAnl,Soll can be predefined by an operator of the energy supply grid by radio or in a wired manner, for example.
In a further embodiment of the method for controlling an electrical installation, the method acts can be run through repeatedly, in particular can be run through repeatedly at regular intervals of time. This results in continuous control or regulation of the installation that can take into account changed device targets PGer,Soll,i and/or installation targets PAnl,Soll over an extended period.
A control unit or circuit according to the disclosure is designed and configured to control, in particular regulate, an electrical installation according to the disclosure. In this case, the installation comprises a plurality of electrical devices. The installation includes at least one device which can be operated in an energy-producing manner and/or at least one device which can be operated in an energy-storing manner—that is to say both in an energy-releasing manner and in an energy-absorbing manner—and/or at least one device which can be operated in an energy-consuming manner. The control unit is configured to carry out the method according to the disclosure. The control unit may be in the form of a separate control unit of the installation. Alternatively, the control unit may also be in the form of a control unit which is integrated in a device of the installation. The control unit may be connected to the devices of the installation which can be operated in an energy-producing, energy-consuming or energy-producing and energy-consuming manner for the purpose of communication and data interchange. The control unit may optionally also be connected to one or more measurement devices in order to detect properties of an AC voltage or of a power flow at the grid connection point—in particular a frequency, a voltage, an active power and/or a reactive power. The control unit may be configured to determine an installation target PAnl,Soll and/or a tolerance band around the installation target PAnl,Soll for a power flow PAnl of the installation from the detected properties, taking into account characteristic curves known to the control unit. The control unit may also be connected to an energy management system assigned to the installation and may be designed to receive individual device targets PGer,Soll,i for a power flow of the individual devices of the installation from the energy management system and to take them into account when controlling the installation. The control unit may also be connected to a communication device in order to receive an installation target PAnl,Soll from an operator of the energy supply grid by radio or in a wired manner and to take it into account when controlling the installation.
An energy-consuming and/or energy-producing electrical installation comprises a plurality of electrical devices. The plurality of devices include at least one device which can be operated in an energy-producing manner, at least one device which can be operated in an energy-storing manner—that is to say both in an energy-releasing manner and in an energy-absorbing manner—and/or at least one device which can be operated in an energy-consuming manner. The installation comprises a control unit or circuit according to the disclosure. In this case, at least one of the electrical devices may have an inverter. The inverter may comprise a photovoltaic (PV) inverter, to the DC input of which a PV generator is connected. Alternatively, the inverter may also comprise a battery inverter, the DC input of which is connected to a battery. The battery inverter can be operated in a bidirectional manner in order to charge and discharge the battery. If the installation has a consumption unit operating in an energy-consuming manner as an electrical device, the consumption unit may comprise a connection unit and a consumer connected to the connection unit. The control unit of the installation is connected to the connection unit and is configured—possibly in conjunction with a controller of the connection unit—to control a power flow to the consumer. The electrical installation may additionally have further electrical devices, in particular electrical devices operating in an energy-consuming manner, which cannot be controlled via the control unit. The advantages which have already been mentioned in connection with the method result for the control unit according to the disclosure and also for the installation according to the disclosure.
The disclosure is illustrated below with the aid of figures, in which
The electrical installation comprises a plurality of electrical devices and includes at least one device which can be operated in an energy-producing manner, one device which can be operated in an energy-consuming manner and/or at least one device which can be operated both in an energy-releasing manner and in an energy-absorbing manner. The latter may be, in particular, an energy storage system having a battery.
The installation 1 also comprises a superordinate control unit 3 or circuit for controlling the electrical devices 2. The control unit 3 is connected to an energy management system 7. The energy management system 7 determines and communicates individual device targets PGer,Soll,i for the individual devices 2 of the installation 1 to the control unit 3. The control unit 3 is also connected to a measurement device 6 for detecting a property of an AC voltage of the energy supply grid. For this purpose, the measurement device 6 is connected to the energy supply grid 5 on a side of the grid connection point facing the energy supply grid. The property detected by the measurement device 6 may be an amplitude U0 and/or a frequency f of the AC voltage. The measurement device 6 is also able to detect a property of a power flow PAnl exchanged between the energy supply grid 5 and the installation 1. The property of the power flow PAnl may be an active, reactive and/or apparent power.
The control unit 3 is designed and configured to carry out the method according to the disclosure. For this purpose, the control unit 3 is aware of an installation target PAnl,son for a power flow PAnl of the installation 1, which is transferred via the grid connection point 4, and a tolerance range around the installation target PAnl,soll. The installation target PAnl,Soll may arise, in one embodiment, taking into account a tariff agreement for the power obtained from the energy supply grid and may be stored in the control unit 3 or the energy management system 7. Alternatively, the installation target PAnl,Soll and possibly the tolerance range around the installation target PAnl,Soll may be determined by the control unit 3 from the properties of the AC voltage in the energy supply grid 5 which are detected by the measurement device 6 at the grid connection point 4. For this purpose, the control unit 3 may take into account characteristic curves, for example an active power/frequency characteristic curve (P(f)), a reactive power/voltage characteristic curve (Q(U)), a reactive power/active power characteristic curve (Q(P)) and/or a phase shift/active power characteristic curve (cos_phi(P)).
In
The method starts at S1. In the following, at S2, individual device targets PGer,Soll,i are determined for each device i of the installation 1, for example by the energy management system 7. At S3, properties of the AC voltage at the grid connection point 4 of the installation 1 are detected by the measurement device 6. In one embodiment, an amplitude U0, a frequency f and a power flow PAnl of the installation 1 are detected. These properties are transmitted to the control unit 3.
At S4, the control unit 3 determines an installation target PAnl,Soll of the installation 1 and a tolerance range around the installation target PAnl,Soll from the properties of the AC voltage which are detected at the grid connection point 4 and taking into account characteristic curves. The installation target PAnl,Soll is within the tolerance range. In this case, it is possible for the installation target to correspond to one of the threshold values. For example, an installation target PAnl,Soll for an active power component of the power flow PAnl of the installation 1 and the tolerance range assigned to the installation target can be determined on the basis of the detected frequency f and taking into account an active power/frequency characteristic curve P(f). In one embodiment, the tolerance range is defined, by way of example, by a lower threshold value PTH1, with PTH1≤PAnl,soll, and an upper threshold value PTH2, with PTH2≥PAnl,soll, for the power flow, in particular its active power component, for example.
At S5, the power flow PAnl of the installation 1, determined at the grid connection point 4 at S3, is compared with the tolerance range around the installation target PAnl,soll. If the power flow PAnl transferred via the grid connection point 4 is within the tolerance range around the installation target PAnl—that is to say when PTH1≤PAnl≤PTH2 applies to the power flow PAnl of the installation 1—the method branches to S6 in which the installation 1 is operated in the second stage by the control unit 3. For this purpose, the individual device targets PGer,Soll,i are communicated to the respective regulators of the devices 2 of the installation 1. Each of the regulators for the plurality of electrical devices may be arranged in the electrical device assigned to it. Alternatively, the regulators may also be arranged together within the control unit. If the regulators are arranged in the devices 2, the control unit 3 signals to the devices 2 of the installation 1 that the power flow PAnl of the installation 1 is within the tolerance range around the installation target PAnl,Soll or the method is operated in the second stage. In a situation in which the regulators are arranged in the control unit 3, corresponding signaling is not required. In response to this, each device 2 of the installation 1 is regulated in such a manner that its power flow PGer,i achieves or corresponds to the respective device target PGer,Soll,i in the best possible manner. This regulation may be carried out via the controllers 14, 24, 34 of the individual electrical devices 2 or by the regulators arranged inside the control unit 3.
The method finally jumps back to S3 in which the power flow PAnl of the installation 1 flowing via the grid connection point 4 as well as the amplitude U0 and the frequency f of the AC voltage are detected again by the measurement device 6.
If the power flow PAnl of the installation 1 that is transferred via the grid connection point 4 is outside the tolerance range around the installation target PAnl,Soll—that is to say when PTH1≤PAnl≤PTH2 does not apply—the method branches to S7 in which the method according to the disclosure is operated by the control unit 3 in the first stage. Here, the aim is to modify the power flow PAnl of the installation 1, which is exchanged with the energy supply grid 5, in the direction of the installation target PAnl,soll, at least such that the power flow changes again into the tolerance range around the installation target PAnl.
If the regulators of the devices 2 are arranged in the respective devices 2, the control unit 3 signals to the devices 2 of the installation 1 that the method is operated in the first stage. In a situation in which the regulators of the devices 2 are arranged in the control unit 3, such signaling is not required. Modified desired values {tilde over (P)}Ger,soll,i or a variable {tilde over (P)}Ger,soll,i comprising the modified desired values {tilde over (P)}Ger,soll,i, for example a modified difference between the modified desired value and the power flow of the device according to ({tilde over (P)}Ger,soll,i−PGer,i), is/are then communicated to the regulators of the electrical devices 2. The modified desired values {tilde over (P)}Ger,soll,i comprise a first correction term, which depends on a difference between the power flow PAnl and the installation target PAnl,Soll of the installation 1, and a second correction term which takes into account a deviation of the power flows PGer,i of the individual devices from their respective individual device targets PGer,Soll,i, which is present overall (i.e. summed over all devices), and is used to distribute the deviation Σi=1n (PGer,soll,i−PGer,i) which is present overall among the individual devices i of the installation 1. In this case, the distribution may be carried out in an unweighted manner or possibly in a manner weighted with weighting factors Xi. The second correction term ensures that the difference ΔPGer,i=PGer,Soll,i−PGer,i between the power flow PGer,i and the respective individual device target PGer,Soll,i for each device of the installation 1 corresponds to a device-specific default value.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2018 132 645.9 | Dec 2018 | DE | national |
This application is a continuation of International Patent Application number PCT/EP2019/080697, filed on Nov. 8, 2019, which claims priority to German Patent Application number 102018132645.9, filed on Dec. 12, 2018, and is hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/EP2019/080697 | Nov 2019 | US |
| Child | 17349074 | US |
