System and method for operating an inverter

Abstract

An inverter (200) is disclosed, which is connected to an energy source (100) and configured to supply power to a load network (300) comprising at least one controllable load, the inverter (200) comprising a processor (201) for controlling the at least one controllable load of the load network (300). The processor (201) comprises a net load detector (201a) which detects a net load of the load network (300), a power output analyzer (201b) which determines an inverter power delivery of the inverter and a grid power delivery of a grid (400), characterized by a power manager (201c) which changes a power output of the inverter (200) and a power consumption of the at least one controllable load based on the inverter power delivery, the grid power delivery, an output condition violation and a derating state of the energy source (100).

Description

Technical Field

[0001] The present invention relates to systems and methods for operating power converters connected to a power source, and more particularly to systems and methods for operating inverters to continuously optimize the self-consumption of power from the power source while controlling the power fed to the public grid. Background Technology

[0002] With the increasing use of distributed energy generators (such as photovoltaic systems), power management has changed considerably over time. A photovoltaic system feeds the electricity generated by the photovoltaic panels to an inverter, which converts the generated direct current (DC) to alternating current (AC). The inverter then supplies AC power to the load network. The inverter's power output is typically additionally connected to the public grid. Generally, when the load network's power demand exceeds the power supplied by the photovoltaic source, the missing power is obtained from the public grid. If the load network's power demand is less than the power supplied by the photovoltaic source, the inverter feeds the excess power back into the public grid.

[0003] However, due to certain regulations / restrictions on power output to the public grid in some countries, owners of photovoltaic (PV) systems choose to self-consume excess electricity generated by the PV source rather than feeding it into the public grid. PV system owners can use controlled storage devices as part of a load network to optimize the self-consumption of excess electricity supplied by the power source. For example, controlled storage devices could include electric water heaters that consume surplus electricity to heat water for domestic needs.

[0004] Households with restrictions on not outputting any electricity to the public grid require inverters to limit power output so that it does not exceed the household's total load consumption. That is, the inverter limits its output power so that its output power is less than or equal to the household's total load consumption. This is achieved by derating the power supply, where the actual power supplied to the inverter by the photovoltaic (PV) source is less than the available power at the PV modules of the PV source. However, since the inverter is unaware of the available power at the PV source during derating, this results in reduced power consumption by the controlled storage device. Furthermore, since the inverter is not allowed to output any power to the public grid, the controlled storage device does not increase power consumption. This leads to a waste of the available power at the PV source. Therefore, the inverter cannot convert the maximum available power at the PV source into power output, thus reducing overall efficiency. Therefore, an effective solution is desired to utilize the maximum available power at the PV source in real time while complying with grid feed regulations.

[0005] Therefore, the object of the present invention is to provide a device and method that allows the maximum available power source to be utilized while complying with grid feed regulations.

[0006] This objective is achieved by an inverter according to the first aspect of the invention and by a method for operating the inverter to optimize power generation from an energy source according to the second aspect of the invention. Attached Figure Description

[0007] Figure 1 Possible embodiments of the architecture of a power generation system with an inverter according to the first aspect of the present invention are shown; and

[0008] Figure 2 A flowchart of a method for operating an inverter to optimize power generation from an energy source, according to a second aspect of the present invention, is shown. Detailed Implementation

[0009] Figure 1 A possible embodiment of the architecture of a power generation system 1000 having an inverter 200 according to a first aspect of the present invention is shown. The inverter 200 is connected to an energy source 100 and is configured to supply power to a load network 300 including at least one controllable load 301. The inverter 200 includes a processor 201 for controlling at least one controllable load of the load network 300. The processor 201 includes a net load detector 201a for detecting the net load of the load network 300. The processor 201 also includes a power output analyzer 201b for determining the inverter power transmission of the inverter 200 and the grid power transmission of the grid 400. A power manager 201c modifies the power output of the inverter 200 and the power consumption of the at least one controllable load 301 based on the determined inverter power transmission, the determined grid power transmission, output condition violations, and the derating state of the energy source 100. In a possible implementation, the derating state can be indicated by a flag. In a possible implementation, the derating state flag can be read by the processor 201 of the inverter 200.

[0010] In possible embodiments, energy source 100 includes at least one renewable energy source, such as a photovoltaic power plant, a wind power plant, a hydropower plant, a biogas power plant, a tidal power plant, or any combination thereof. Figure 1The inverter 200 shown is connected to an energy source 100. In one embodiment, the energy source 100 is a photovoltaic unit, which may include one or more photovoltaic strings of photovoltaic modules within a photovoltaic array. The inverter 200 converts DC current received from the photovoltaic unit into AC current, which may be fed by the inverter 200 to a load network 300. Additionally, the inverter 200 is also connected to a power grid 400. The inverter 200 includes a user interface 202 that communicates with a processor 201 of the inverter 200. The user interface 202 may include a display screen, a touchscreen or touchpad, a microphone, buttons, lights, an augmented reality display device, a virtual reality display device, a web interface, or any combination thereof. The processor 201 may include a microprocessor or a microcontroller. The processor 201 may generate control signals applied to the controllable loads 301 to control their power consumption and / or control the AC power output by the inverter 200.

[0011] Inverter 200 is also configured to supply power (AC) to load network 300 via a local power path. Load network 300 includes, for example, residential locations, non-residential locations, or any combination thereof. Load network 300 includes power-consuming devices, such as household appliances, such as computers, refrigerators, lights, air conditioners, etc. At least one controllable load 301 forms part of load network 300. Controllable load 301 includes, for example, water heaters, heat pumps, rechargeable batteries, etc. Load network 300 may also include uncontrollable loads 302. Inverter 200 includes processor 201 for controlling at least one controllable load 301 of load network 300. Processor 201 includes net load detector 201a for detecting the net load of load network 300. The net load of load network 300 represents the total electrical load of load network 300. Net load detector 201a sends details about the net load of load network 300 to power output analyzer 201b of processor 201. The loads 301 and 302 of the load network 300 may include AC loads that consume AC power P1 generated by the inverter 200. The processor 201 of the inverter 200 may communicate with the load network 300 via a communication path such as a bus. This communication may be bidirectional; for example, when the controllable load 301 receives a control signal CRTL from the processor 201 to change its power consumption, it acknowledges the changed power consumption to the processor 201. The control signal CRTL between the inverter 200 and the load network 300 is represented by a bidirectional dashed line, as shown below. Figure 1 As shown.

[0012] The communication can be performed using a predefined communication protocol suitable for the corresponding use case. The communication can be performed on a wired fieldbus or via a wireless interface. The processor 201 can communicate with sensors and / or smart meters to determine inverter power delivery and grid power delivery. In a possible embodiment, the communication is performed as power line communication (PLC). For example, the smart meter is positioned such that it communicates with inverter 200, grid 400, and load network 300. The smart meter tracks inverter power delivery of inverter 200 and grid power delivery of grid 400. The smart meter measures the energy consumption and generation for power generation system 1000. In another example, energy consumption data for power generation system 1000 is measured via sensors located at each load in load network 300 and grid 400. In one example, the sensor transmits the sensed data to the smart meter via a power line transceiver. Figure 1 The sensor and / or smart meter are not explicitly shown in the document.

[0013] The power output analyzer 201b determines the inverter power transfer of inverter 200 and the grid power transfer of grid 400. The inverter power transfer is the measured power transfer from inverter 200 to load network 300 and / or to grid 400. The grid power transfer is the power transfer from grid 400 to load network 300. The power flow between photovoltaic energy source 100, inverter 200, load network 300, and grid 400 is represented by a solid line in the direction of the flow arrows. Loads 301 and 302 of load network 300 consume AC power P1 generated by inverter 200. The power transferred from grid 400 and consumed by load network 300 is represented by P2. The power flow from inverter 200 to grid 400 is represented by P3. The power flow from photovoltaic energy source 100 to inverter 200 is represented by P... PV The total power transmitted from inverter 200 to load network 300 and / or grid 400 is equal to the sum of P1 and P3, and this indicates the inverter power transmission of inverter 200. Similarly, the grid power transmission from grid 400 to load network 300 is represented by P2.

[0014] The power manager 201c of the processor 201 of inverter 200 determines output condition violations based on determined inverter power transmission and / or determined grid power transmission. The power manager 201c evaluates inverter power transmission and / or grid power transmission to determine any output condition violations based on the definition of a corresponding output condition. For example, an output condition may be region-specific and defined by a local regulatory authority. The output condition violation definition encompasses all violations related to the defined output condition. In one example, the output condition refers to the amount of power transmitted from inverter 200 to grid 400 at any given time. In another example, the power manager 201c considers the amount of power transmitted from inverter 200 to load network 300 and / or grid 400, and the amount of power transmitted from grid 400 to load network 300, at a given time instance to determine output condition violations. In yet another example, the power manager 201c considers multiple output conditions based on inverter power transmission and / or grid power transmission to determine output condition violations.

[0015] Output condition violations can be defined based on rules. These rules (e.g., IF-THEN rules) can be defined by one or more rules stored in a configuration file. This configuration file can be loaded and stored in the configuration memory of inverter 200. In a possible embodiment, the configuration file can be edited via user interface 202. In a possible embodiment, at least one configuration file can be loaded from a platform (particularly a cloud platform connected to inverter 200 via a data network) through the data interface of inverter 200. A configuration file can be selected from the platform's storage and downloaded to the configuration memory of inverter 200. In a possible embodiment, this selection is performed based on the physical location of inverter 200 (e.g., in the country where inverter 200 is installed). In a possible embodiment, inverter 200 includes a GPS receiver to generate coordinates indicating the instantaneous installation location of inverter 200. These coordinates can be processed to automatically select a matching configuration file.

[0016] In one example, a user of system 1000 sets and defines a rule for output condition violations via user interface 202 of system 1000. This rule is region-specific and defined by the local management authority that manages energy transmission to the public utility grid 400. The rule stipulates that at any given time, an instance is only allowed to transmit a maximum of 10% of the total power generated by energy source 100 to the public utility grid 400. Net load detector 201a sends details about the net load of load network 300 to power output analyzer 201b of processor 201. Power output analyzer 201b determines the inverter power transmission of inverter 200 and the grid power transmission of grid 400. When the total power transmitted by the instance to the public utility grid 400 at any given time exceeds 10% of the total power generated by energy source 100, power manager 201c of processor 201 of inverter 200 determines an output condition violation.

[0017] In one embodiment, the output status indicates zero power feed to the grid 400. That is, the power generated by the inverter 200 is fully utilized by the load network 300, such that no power is fed to the grid 400. In other words, the load network 300 consumes the power generated by the inverter 200 without outputting any power to the grid 400. This prevents power from the energy source 100 from reaching the grid 400. In another embodiment, the output status indicates the maximum output power from the energy source 100 to the grid 400 during a predefined time interval. In yet another embodiment, the output status indicates the permissible time period for outputting power from the energy source 100 to the grid 400.

[0018] If the power manager 201c determines that an output condition violation exists, it automatically increases the power consumption of at least one controllable load 301 and automatically reduces the power output of the inverter 200 proportionally to the degree of the violation (e.g., deviation from a set value or threshold). The reduction in AC power output from the inverter 200 and the increase in power consumption of at least one controllable load 301 of the load network 300 are based on the determined magnitude of the output condition violation. The power manager 201c can determine the magnitude of the output condition violation through power measurements performed by sensors or smart meters.

[0019] When the power manager 201c increases the power consumption of at least one controllable load 301 and decreases the power output by the inverter 200 based on the amount of output condition violation, the power manager 201c checks the derating state of the energy source 100. The power manager 201c considers the derating state of the energy source 100 to additionally increase the power of at least one controllable load 301. The additional amount of power increase for at least one controllable load 301 is a predetermined value. In one embodiment, the predefined power value of at least one controllable load 301 is based on the nominal power output of the inverter 200. The power manager 201c additionally increases the power consumed by at least one controllable load 301 only when the derating state of the energy source 100 is active. In other words, when the energy source 100 is in a derating state, the power manager 201c additionally increases the power consumed by at least one controllable load 301 by the predetermined value. In one embodiment, the derating state of the energy source 100 refers to the operation of the energy source 100 at a level below its instantaneous maximum capacity, taking into account solar radiation. If the derating state of the energy source 100 is not activated, the power manager 201c will not additionally increase the power of at least one controllable load 301 by the predetermined value.

[0020] In scenarios where the power manager 201c determines that there is no output condition violation based on the inverter power transmission and grid power transmission, the power manager 201c considers the grid power transmission and the derating state of the energy source 100 to further change the power output of the inverter 200 and the power consumption of at least one controllable load 301.

[0021] When the energy source 100 is not in a derating state and there is grid power transmission, the power manager 201c reduces the power of at least one controllable load 301 based on the measured grid power transmission, specifically proportional to the measured grid power transmission. That is, the power manager 201c reduces the power of at least one controllable load 301 based on the amount of power transmitted from the grid 400 to the load network 300. The power manager 201c does not change the power output of the inverter 200.

[0022] Furthermore, after reducing the power of at least one controllable load 301 based on the determined amount of grid power transmission, the power manager 201c checks again whether the energy source 100 remains in a derating state. If the energy source 100 remains in a derating state, the power manager 201c further increases the power of at least one controllable load 301 by the predetermined value. Here, the predetermined increase in power of at least one controllable load 301 based on the derating state of the energy source 100 is substantially greater than the reduction in power of at least one controllable load 301 based on the amount of grid power transmission. If the energy source 100 is not in a derating state after reducing the power of at least one controllable load 301 based on the amount of grid power transmission, the power manager 201c will not increase the power of at least one controllable load 301 by the predetermined value.

[0023] In a possible embodiment, when the energy source 100 is in a derating state and grid power transmission is present, the power manager 201c increases the power output of the inverter 200 and decreases the power of at least one controllable load 301 proportionally to the determined grid power transmission. That is, the power manager 201c increases the power output of the inverter 200 and decreases the power of at least one controllable load 301 based on the amount of power transmitted from the grid 400 to the load network 300. Furthermore, after completing the proportional increase in the inverter 200's power output and the decrease in the power of at least one controllable load 301, the power manager 201c checks again whether the energy source 100 remains in a derating state. If the energy source 100 remains in a derating state, the power manager 201c further automatically increases the power of at least one controllable load 301 by the predetermined value. If the energy source 100 no longer remains in a derating state, the power manager 201c does not further increase the power consumed by at least one controllable load 301 by the predetermined value.

[0024] In the following description, consider a scenario where the power manager 201c determines that there is a violation of the no-output condition and no grid power transmission. The power manager 201c checks whether the energy source 100 is in a derating state. When the energy source 100 is in a derating state, the power manager 201c increases the power consumption of at least one controllable load 301 by the predetermined value. When the energy source 100 is not in a derating state, the power manager 201c does not increase the power consumption of at least one controllable load 301 by the predetermined value.

[0025] Therefore, inverter 200 utilizes the maximum available power at photovoltaic energy source 100 in real time by controlling at least one controllable load 301 to increase power consumption until each of the at least one controllable load 301 reaches its maximum available power consumption, or when the power generated by energy source 100 no longer increases; it also maintains grid feed limits defined by local regulatory authorities, which can be defined as output condition violation rules in a configuration file. This configuration file may include different rules for different regions or locations. It is also possible to provide different configuration files for different regions. In one embodiment, processor 201 of inverter 200 continuously repeats the process of increasing the power consumption of at least one controllable load 301. This, in turn, increases the self-consumption of power from energy source 100. In another embodiment, because the maximum available power from energy source 100 varies over time, processor 201 of inverter 200 repeats this process at predefined time intervals.

[0026] Figure 2 A flowchart of a method for operating an inverter 200 to optimize power generation according to a second aspect of the present invention is shown.

[0027] In step S1, the net load detector 201a of the processor 201 detects the net load of the load network 300. In step S2, the power output analyzer 201b determines the inverter power transmission of the inverter 200 and the grid power transmission of the grid 400. The inverter power transmission is the power transmission from the inverter 200 to the load network 300 and / or to the grid 400. The grid power transmission is the power transmission from the grid 400 to the load network 300. The grid 400 includes the public power grid.

[0028] In step S3, the power manager 201c determines whether an output condition violation exists based on the determined inverter power delivery and / or the determined grid power delivery. Furthermore, the power manager 201c can determine the extent of the output condition violation. The output condition violation and its extent can be determined by evaluating the current inverter power delivery and the current grid power delivery measured by sensors and / or smart metering devices based on predefined rules that can be loaded from a configuration file or hardwired into the programmable logic. If the power output analyzer 201b determines an output condition violation, the power manager 201c automatically increases the power consumption of at least one controllable load 301 and automatically reduces the power output by the inverter 200, as in step S5, based on the determined amount or extent of the output condition violation. In a possible embodiment, the reduction in inverter 200 power output and / or the increase in power consumption are proportional to the determined amount of the output condition violation. Furthermore, in step S9, the power manager 201c again checks whether the energy source 100 remains in a derating state. In step S10, if the energy source 100 continues to be in a derating state, the power manager 201c further increases the power of at least one controllable load 301 by the predetermined value.

[0029] Output condition violations detected by power manager 201c in step S3 can be notified or reported to the remote central controller via user interface 202.

[0030] In step S4, after the power manager 201c has determined in step S3 that there are no output condition violations based on the determined inverter power transmission and the determined grid power transmission, the power manager 201c considers the grid power transmission. As in step S6, the power manager 201c also considers the current (instantaneous) derating state of the energy source 100 to further modify the AC power output of the inverter 200 and the power consumption of at least one controllable load 301. If grid power transmission exists, and if the energy source 100 is in a derating state, the control routine proceeds to step S8. If grid power transmission exists, and if the energy source 100 is not in a derating state, the control routine proceeds to step S7.

[0031] In step S7, when the energy source 100 is not in a derating state and there is grid power transmission, the power manager 201c reduces the power of at least one controllable load 301 based on the determined grid power transmission. Furthermore, in step S9, the power manager 201c checks again whether the energy source 100 remains in a derating state. In step S10, if the energy source 100 remains in a derating state, the power manager 201c further increases the power of at least one controllable load 301 by the predetermined value.

[0032] In step S8, when the energy source 100 is in a derating state and there is grid power transmission, the power manager 201c increases the power output of the inverter 200 and reduces the power consumption of at least one controllable load 301 based on the determined grid power transmission. Furthermore, in step S9, the power manager 201c checks again whether the energy source 100 remains in a derating state. In step S10, if the energy source 100 remains in a derating state, the power manager 201c further increases the power consumed by the at least one controllable load 301 by the predetermined value.

[0033] In step S3, if the power manager 201c determines that there is no output condition violation, and in step S4, if the power manager 201c determines that there is no grid power transmission, then in step S9, the power manager 201c checks again whether the energy source 100 is in a derating state. In step S10, if the energy source 100 is in a derating state, the power manager 201c increases the power consumed by at least one controllable load 301 by the predetermined value. Based on the decision in step S9, the power manager 201c repeats the process starting from step S1.

[0034] This method reduces the waste of unknown residual power generated at energy source 100 during derating. Processor 201 initiates Maximum Power Point Tracking (MPPT) by allowing at least one controllable load 301 to consume additional power even when no residual power is available. This, in turn, allows inverter 200 to generate more power from energy source 100 for the load network 300. Processor 201 allows at least one controllable load 301 to increase its power consumption until each of the at least one controllable load 301 actually reaches its maximum consuming power or when the power generated by energy source 100 no longer increases further. Furthermore, this method does not rely on a specific threshold for setting the setpoint of inverter 200.

[0035] Therefore, inverter 200 increases the consumption of its own generated power, thereby maintaining zero power fed to grid 400. This method is efficient and cost-effective because it consumes the generated power instead of drawing power from grid 400. At any given time, the power transmitted to grid 400 is equal to zero. The term "equal to zero" should not be understood as an exact number zero, but rather as a range around zero. It should not be limited to a zero-feed-in condition, but can also be equal to a specific value, for example, to meet specific grid 400 requirements.

[0036] Figure 2 The computer-implemented control routines shown in the flowchart can be executed by a program running on the processor 201 of the inverter 200. This program can be executed continuously and periodically in the background within the real-time control loop.

[0037] Figure 2 The control program shown in the flowchart can be loaded as an application from the platform's server and deployed in the program memory of the inverter 200 in a possible embodiment.

[0038] Providing loadable control apps and configuration files for different types of inverters 200 and / or different installation locations allows for flexible worldwide use of the power generation system 1000 according to the invention. In a possible embodiment, the inverter 200 notifies a remote cloud server of parameters of the inverter and / or the connected energy source 100, as well as parameters of its current installation location (e.g., coordinates), to trigger the download of an adaptation control application and / or adaptation configuration file suitable for the type of inverter 200 and the power output specified at the location of the power generation system 1000.

Claims

1. An inverter (200) connected to an energy source (100) and configured to supply power to a load network (300) comprising at least one controllable load (301), the inverter (200) comprising a processor (201) for controlling the at least one controllable load (301) of the load network (300), the processor (201) comprising: a net load detector (201a) for detecting a net load of the load network (300); a power output analyzer (201b) for determining an inverter power transfer (PI, P3) of the inverter (200) and a grid power transfer (P2) of a grid (400); and a power manager (201c) for changing a power output of the inverter (200) and a power consumption of the at least one controllable load (301) based on the determined inverter power transfer (PI, P3), the determined grid power transfer (P2), an output condition violation and a derating state of the energy source (100); wherein the power manager (201c) is configured to perform the following steps: if the energy source (100) is not in the derating state (S6), decreasing (S7) the power consumption of the at least one controllable load (301) in dependence on the grid power transfer (P2) in case the grid power transfer (S4) is present and there is no output condition violation (S3); checking (S9) the derating state of the energy source (100); and if the energy source (100) is in the derating state, increasing (S10) the power of the at least one controllable load (301) by a predetermined value. the derating state of the energy source (100) is indicated by a derating state flag read by the processor (201) of the inverter (200).

2. The inverter of claim 1, wherein, the inverter power transfer (PI, P3) comprises a power transfer from the inverter (200) to the load network (300) and / or to the grid (400).

3. The inverter of claim 1 or 2, wherein, the grid power transfer (P2) is a power transfer from the grid (400) to the load network (300).

4. The inverter of claim 1 or 2, wherein, the power manager (201c) determines the output condition violation based on the determined inverter power transfer (PI, P3) and / or the determined grid power transfer (P2).

5. The inverter of claim 1 or 2, wherein, the power manager (201c) increases the power consumption of the at least one controllable load (301) and decreases the power output of the inverter (200) in proportion to the extent of the output condition violation.

6. The inverter of claim 1 or 2, wherein, the power manager (201c) is configured to perform the following steps:

7. The inverter of claim 1 or 2, wherein, increasing (S5) the power consumption of the at least one controllable load (301) and decreasing (S5) the power output of the inverter (200) in dependence on the output condition violation; checking (S9) the derating state of the energy source (100); and if the energy source (100) is in the derating state, increasing (S10) the power of the at least one controllable load (301) by a predetermined value. ​ increasing (S10) power consumption of the at least one controllable load (301) by a predetermined value when the energy source (100) is in the derated state.

8. The inverter of claim 1 or 2, wherein, The power manager (201c) is configured to perform the following steps: If the energy source (100) is in the derated state (S6), increasing (S8) power output of the inverter (200) in proportion to the grid power transfer (P2) and decreasing (S8) power of the at least one controllable load (301) in the presence of the grid power transfer (S4) and in the absence of an output condition violation (S3); checking (S9) the derated state of the energy source (100); and increasing (S10) power of the at least one controllable load (301) by a predetermined value when the energy source (100) is in the derated state.

9. The inverter of claim 1 or 2, wherein, The power manager (201c) is configured to perform the following steps: checking (S9) the derated state of the energy source (100) in the absence of the grid power transfer (S4) and in the absence of an output condition violation (S3); and increasing (S10) power consumption of the at least one controllable load (301) by a predetermined value when the energy source (100) is in the derated state.

10. A method for operating an inverter (200) to optimize power generation of an energy source (100), the method comprising the steps of: detecting (S1) a net load of a load network (300); determining (S2) an inverter power transfer (P1, P3) of the inverter (200) and a grid power transfer (P2) of a grid (400); and controlling (S3-S10) power output of the inverter (200) and power consumption of at least one controllable load (301) of the load network (300) based on the determined inverter power transfer (P1, P3), the determined grid power transfer (P2), a detected output condition violation, and a derated state of the energy source (100); wherein controlling (S3-S10) power output of the inverter (200) and power consumption of at least one controllable load (301) of the load network (300) comprises: if the energy source (100) is not in the derated state (S6), decreasing (S7) power consumption of the at least one controllable load (301) in dependence on the grid power transfer (P2) in the presence of the grid power transfer (S4) and in the absence of an output condition violation (S3); checking (S9) the derated state of the energy source (100); and if the energy source (100) is in the derated state, increasing (S10) power of the at least one controllable load (301) by a predetermined value.

11. The method of claim 10, wherein, The determined inverter power transfer (P1, P3) comprises a power transfer from the inverter (200) to the load network (300) and / or to the grid (400).

12. The method of claim 10 or 11, wherein, The determined grid power transfer (P2) comprises a power transfer from the grid (400) to the load network (300).

13. The method of claim 10 or 11, wherein, The power manager (201c) determines the output condition violation based on the determined inverter power transfer (P1, P3) and / or the determined grid power transfer (P2).

14. The method of claim 10 or 11, wherein, The power manager (201c) automatically increases the power consumption of the at least one controllable load (301) of the load network (300) and automatically decreases the power output of the inverter (200) in proportion to the determined output condition violation.

15. A power generation system (1000) comprising The inverter (200) according to any one of claims 1 to 9, the inverter (200) having a processor (201) for executing a computer-implemented method according to any one of claims 10 to 14, the method optimizing the power utilization of the power generated by an energy source (100) of the power generation system (1000) connected to the inverter (200).

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