Method and control device for controlling a renewable power plant

Abstract

A method (200) for controlling a renewable power plant (100) comprising one or more renewable power generation units (103) and one or more electric-to-gas units (120), the renewable power plant (100) being connected to a gas transmission network (126). The method (200) comprises determining (210) one or more parameters of the gas transmission network (126); controlling (220), based on the determined one or more parameters of the gas transmission network (126), the one or more electric-to-gas units (120) to convert electric power provided at least in part by the one or more renewable power generation units (103) into gas; and controlling (230), based on the determined one or more parameters of the gas transmission network (126), the renewable power plant (100) to introduce at least a portion of the converted gas into the gas transmission network (126) in order to improve stability of the gas transmission network (126).

Description

Technical Field

[0001] Various aspects of the present invention relate to methods and control apparatus for controlling a renewable power plant, the renewable power plant including one or more renewable power generation units and one or more electricity-to-gas units, the renewable power plant being connected to a gas transmission network. Other aspects of the present invention relate to a renewable power plant including the aforementioned control apparatus, and a computer program or computer-readable medium for implementing the methods. Background Technology

[0002] Renewable power plants rely on renewable energy sources such as wind and / or solar power to generate electricity using wind turbine generators and / or photovoltaic generators. Renewable power plants may also include one or more power-to-gas (ETO) units and may also be referred to as ETO-X power plants. In addition to electricity, renewable power plants may produce additional energy carriers, such as green hydrogen produced from water, and other green synthetic fuels produced by mixing green hydrogen with additional compounds and / or elements. Byproducts of renewable power plants may include recoverable low-grade heat and oxygen, both derived from the electrolysis of water.

[0003] Renewable power plants can be connected to external power grids, external hydrogen or natural gas networks, external heat distribution networks, and / or networks for industrial products (such as electronic fuels) via one or more interfaces.

[0004] The integration of multiple energy carriers / products provides renewable power plants with the possibility of exchanging different types of energy carriers through one or more energy exchange nodes. For example, electricity, hydrogen, and / or heat can be exchanged at such nodes. The interface can be implemented as a physical point where the energy flow between the renewable power plant and its surrounding environment (e.g., various external networks) is formally regulated. Therefore, an energy carrier can only be exchanged for another energy carrier if it possesses a specific set of properties, such as specific voltage, frequency, pressure, flow rate, and / or temperature. This specific set of properties may correspond to, be included in, or encompass network / grid specifications for one or more energy carriers.

[0005] Regulation of renewable power plants can be controlled, for example, by one or more electricity or gas transmission system operators, who may be responsible for regulating energy nodes configured to exchange electricity and gaseous fuels (e.g., hydrogen). In some countries, these one or more transmission system operators may include national transmission system operators. Furthermore, local district heating companies may regulate / control energy nodes configured to exchange low-grade heat. Because energy exchange may cross national borders, national electricity or gas transmission system operators may be coordinated by supranational agencies.

[0006] Depending on the configuration of the renewable power plant and the available energy infrastructure, it is necessary to develop control systems and strategies that can simultaneously comply with network / grid specifications for electricity and gas distribution systems, as well as potential heat distribution systems. Therefore, for the reliable operation of a renewable power plant, it is required that the plant produce energy based on a specific set of properties (e.g., voltage, frequency, flow rate, pressure, and / or temperature) according to the energy carrier. Summary of the Invention

[0007] In certain circumstances, imbalances may occur in the external hydrogen or natural gas networks (i.e., gas transmission / distribution networks) to which renewable power plants are connected. Imbalances may be caused, for example, by the shutdown of large gas-consuming units, such as by deliberate reduction of their operation, or by a sudden accident or production interruption at a large gas-consuming unit. Imbalances may also be caused by the startup of large gas-consuming units, i.e., when they suddenly begin consuming large amounts of gas. Imbalances in the gas transmission network may, for example, result in unstable gas flow rates, unstable gas pressures, and / or changes in gas quantity within the gas transmission / distribution network. Therefore, rapidly changing gas flow rates, gas pressures, and / or gas quantities over time can be an indication of imbalances in the gas transmission / distribution network.

[0008] The purpose of this invention is to provide a solution to alleviate or resolve such imbalance problems.

[0009] The purpose of this invention is to provide a solution that mitigates or solves the drawbacks and problems of conventional solutions.

[0010] The foregoing and other objectives are addressed by the subject matter of the independent claims. Further advantageous embodiments of the invention can be found in the dependent claims.

[0011] According to a first aspect of the invention, a method for controlling a renewable power plant is provided, the renewable power plant comprising one or more renewable power generation units and one or more electricity-to-gas units, the renewable power plant being connected to a gas transmission network. The method includes: Determine one or more parameters of the gas transport network; Based on the one or more parameters determined by the gas transport network, the one or more electro-gas conversion units are controlled to convert at least a portion of the electrical power provided by the one or more renewable power generation units into gas; and Based on one or more parameters determined for the gas transmission network, the renewable power plant is controlled to introduce at least a portion of the converted gas into the gas transmission network in order to improve the stability of the gas transmission network.

[0012] Therefore, gas can be generated in a renewable power plant by converting electrical power into gas in one or more electro-gas conversion units. The gas can then be introduced into a gas transmission network. The generation of gas and its introduction into the gas transmission network are based on one or more parameters of the gas transmission network, which can indicate the stability level of the gas transmission network.

[0013] Therefore, if the gas transmission network is unstable, i.e., there are imbalances within the network, such as rapidly changing pressure, flow rate, and / or gas volume, these instabilities can be offset by introducing generated gas into the network. Thus, renewable power plants can improve imbalances in gas transmission networks and potentially restore balance to the gas transmission system.

[0014] In particular, short-term changes in gas transmission networks that are impossible or at least very difficult to predict can be managed. Such short-term changes may be caused, for example, by the start-up or shutdown of large gas-consuming units in the gas transmission network. By monitoring the gas transmission network, i.e., by determining one or more parameters of the gas transmission network, such sudden changes in the gas transmission network can be managed by the renewable power plant.

[0015] Since the generation of gas and the introduction of the generated gas into the gas transport network are based on one or more parameters of the gas transport network, the real-time or near-real-time balance of the gas transport network can thus be achieved by the renewable power plant.

[0016] According to one embodiment of the first aspect, the method further includes: determining an instability of the gas transport network based on the determined parameters of the gas transport network; and controlling the one or more electro-gas conversion units to convert electrical power into gas based on the determined instability of the gas transport network.

[0017] By identifying instabilities in the gas transport network and, based on these identified instabilities, converting electrical power into gas and introducing the converted gas into the gas transport network, the instabilities of the gas transport network are effectively counteracted.

[0018] Imbalances in gas transport networks, such as those related to rapidly changing pressure, flow rate, and / or gas quantity, can be stabilized / balanced by introducing the resulting gas into the gas transport network. In particular, instabilities caused by short-term changes in the gas transport network can be offset by introducing gas into the network.

[0019] According to one embodiment of the first aspect, if at least one of the determined parameters of the gas transmission network exceeds a fluctuation amplitude threshold A th The amplitude A fluctuates, that is, A>Ath If so, then the gas transport network is determined to be unstable.

[0020] Some of the determined parameters of the gas transport network have naturally fluctuating values. A fluctuation amplitude threshold A is used. th This is used to identify parameters that fluctuate excessively (i.e., abnormally), thereby indicating instability in the gas transmission network.

[0021] According to one embodiment of the first aspect, the renewable power plant is connected to the power grid, wherein the method further includes: Based on one or more parameters determined by the gas transmission network, electrical power is input from the power grid to the renewable power plant; and Based on the one or more parameters determined by the gas transmission network, the one or more power-to-gas units are controlled to convert at least a portion of the electrical power input from the power grid into gas, in addition to the electrical power provided by the one or more renewable power generation units.

[0022] When a renewable power plant is connected to the grid, there are more possibilities to offset the instabilities of the gas transport network. The electrical power available for conversion into gas can then be provided by both one or more renewable power generation units at the renewable power plant and the grid. Therefore, electrical power can be input from the grid to the renewable power plant, and in addition to the electrical power generated by one or more renewable power generation units at the renewable power plant, this input electrical power can also be converted into gas.

[0023] This enables renewable power plants to achieve a higher level of flexibility. For example, when wind turbine generators and / or photovoltaic generators cannot generate enough electrical power to stabilize the gas transmission network, such as during periods of low wind and / or at night or on cloudy days, the instability of the gas transmission network can still be offset and improved by converting the input electrical power into gas and introducing the converted gas into the gas transmission network.

[0024] According to one embodiment of the first aspect, the method further includes: Determine one or more parameters of the power grid; and Based on the one or more parameters determined by the power grid, electrical power is input from the power grid to the renewable power plant for the purpose of converting at least a portion of the electrical power input from the power grid into gas.

[0025] When electrical power is input from the power grid, the state and / or condition of the power grid are also used as the basis for decisions related to the electrical power input by simultaneously considering one or more parameters of the power grid. Therefore, when electrical power is input from the power grid, the state and / or condition of both the gas transmission network and the power grid are taken into account. The input of electrical power and the conversion of the input electricity into gas are optimized to adapt to the current situation occurring in one or both of the gas transmission network and the power grid.

[0026] According to one embodiment of the first aspect, the one or more electro-gas conversion units are controlled to convert only the electrical power provided by the one or more renewable power generation units into gas.

[0027] Therefore, no electrical power is input here for converting electrical power into gas. Thus, the conversion of electrical power to gas can be performed without potentially expensive electrical power input. In this way (i.e., no input), it is also ensured that the electrical power originates solely from the renewable power generation unit, i.e., from renewable energy sources.

[0028] According to one embodiment of the first aspect, the determined one or more parameters of the gas transport network fluctuate over time, and the fluctuation indicates the stability of the gas transport network.

[0029] By analyzing the natural fluctuations of one or more parameters of a gas transport network, parameters that change in an anomalous manner can be identified as indicators of instability, while parameters that change normally can be detected as indicators of the stability of the gas transport network.

[0030] According to one embodiment of the first aspect, the method further includes: Based on the one or more parameters determined by the gas transmission network, the power generation capacity of the renewable power plant is allocated. Controlling the one or more renewable power generation units to generate electrical power by utilizing the allocated power generation capacity; and The one or more electro-to-gas units are controlled to convert at least a portion of the generated electrical power into gas.

[0031] This allocation of power generation capacity creates a power reserve that can be used to generate gas if needed. Thus, a power reserve for gas conversion is allocated, which can be introduced into the gas transmission network to compensate for instabilities / imbalances within the network.

[0032] According to one embodiment of the first aspect, the method further includes: An imbalance is determined to exist in the gas transport network if one or more of the following conditions or events are valid: • At least one of the determined parameters of the gas transport network is below a preset threshold P.th The value of P, that is, P <P th ;as well as • At least one of the determined parameters of the gas transport network exceeds a preset change threshold M with a time variation amplitude M. th The gradient fluctuates, i.e., M > M th ;as well as When an imbalance is determined in the gas transmission network, based on the determined parameters of the gas transmission network, the one or more power-to-gas (HPC) units are controlled to convert electrical power from the renewable power plant into gas; and Based on one or more parameters determined for the gas transmission network, the renewable power plant is controlled to introduce at least a portion of the converted gas into the gas transmission network in order to counteract imbalances in the determined gas transmission network.

[0033] By identifying an imbalance in the gas transport network and, based on that imbalance, converting electrical power into gas and introducing the converted gas into the gas transport network, the imbalance is effectively counteracted.

[0034] For example, short-term variations in a gas transport network can be identified by comparing one or more determined parameters of the network with corresponding thresholds. Some of the determined parameters of the gas transport network naturally fluctuate. However, if they fluctuate too rapidly, this could be an indication of imbalance in the gas transport network. Therefore, the fluctuation gradient can be analyzed, and if the magnitude M of the parameter value changing over time exceeds a corresponding threshold M... th M>M th This allows for a rapid and reliable determination of gas transport imbalances. For other parameters of the gas transport network, this can be determined by inferring that the values ​​P of these parameters are below a preset threshold P. th That is, P <P th This makes it easier to identify imbalances.

[0035] According to one embodiment of the first aspect, the determined one or more parameters of the gas transport network include one or more of the following: • Pressure of the gas transmission network; • Gas flow rate in the gas transmission network; • The direction of gas flow in the gas transport network; • Gas volume in the gas transport network; • The quantity of one or more gases at one or more locations in a gas transport network; and • Set point for renewable power plants.

[0036] Therefore, various parameters of the gas transmission network can be used as the basis for the conversion of electrical power to gas and / or the introduction of the converted gas into the gas transmission network, providing flexibility and reliability for gas production and / or introduction. The one or more parameters determined for the gas transmission network can be parameters that typically fluctuate. The one or more parameters determined for the gas transmission network can correspond to, be included in, and / or be part of the network / grid specifications for the gas transmission network, i.e., can define a specific set of properties that gas distributors must meet in the energy market.

[0037] According to one embodiment of the first aspect, each of the one or more electro-to-gas units is configured to convert electrical power into gas by utilizing an electrolyzer system.

[0038] Electrolyzer systems provide a way to efficiently convert electrical power into gas with minimal conversion losses.

[0039] According to one embodiment of the first aspect, the method further includes: Based on the one or more parameters determined by the gas transport network, the one or more electro-gas conversion units are controlled to convert electrical power into gas or a gas mixture, the gas or gas mixture comprising or consisting of one or more of the following: ·hydrogen; Oxygen; and Methane.

[0040] Hydrogen, oxygen, and / or methane gases are available in large-scale implementations. Furthermore, these gases can be converted into other products in one or more power plant extension units by consuming electricity from a renewable power plant. Here, gases, along with possible other compounds or elements (e.g., nitrogen or carbon dioxide), can be used to produce other industrial products, such as electronic fuels, ammonia, and / or methanol.

[0041] According to one embodiment of the first aspect, the one or more renewable power generation units include one or more of the following: • Wind turbine generators in renewable power plants; • Photovoltaic generators in renewable power plants; • Battery energy storage systems for renewable power plants; and • Fuel cells for renewable power plants.

[0042] Therefore, a renewable power plant can include multiple different renewable power generation units, each utilizing a corresponding number of different renewable energy sources. Thus, a renewable power plant can generate renewable electricity under various weather conditions (e.g., different wind and sunlight conditions).

[0043] According to one embodiment of the first aspect, the method further includes: Determine one or more parameters at the point of interest, at which one or more requirements of the gas transport network will be met; Based on the one or more parameters determined at the point of interest, one or more reference values ​​are issued to the renewable power plant. Based on the one or more reference values ​​issued, the one or more electro-gas conversion units are controlled to convert electrical power into gas; and Based on one or more parameters determined at the point of interest, the renewable power plant is controlled to introduce at least a portion of the converted gas into a gas transmission network in order to meet one or more requirements at the point of interest.

[0044] When determining one or more parameters of the gas transmission network at a point of interest where the renewable power plant and the gas transmission network are connected, the requirements may correspond to and / or be included in the gas transmission network / grid specifications. The issued reference values ​​may correspond to or include setpoints intended for controlling the entire renewable power plant and / or reference points intended for controlling individual entities within the renewable power plant.

[0045] Therefore, based on gas transmission network / grid specifications, gas is generated by converting electrical power and then introduced into the gas transmission network. This controls the gas production and introduction into the gas transmission network by the renewable power plant, ensuring that the gas transmission conforms to its network / grid specifications. In other words, the renewable power plant balances the gas transmission network based on its gas network specifications, ensuring that the gas transmission network securely provides gas that conforms to its specific set of properties (e.g., flow rate and / or pressure properties).

[0046] According to a second aspect of the invention, a control device for controlling a renewable power plant is provided, wherein the renewable power plant includes one or more renewable power generation units and one or more electricity-to-gas conversion units, and is connected to a gas transmission network. The control device is configured to: Determine one or more parameters of the gas transport network; Based on the one or more parameters determined by the gas transport network, the one or more electro-gas conversion units are controlled to convert at least a portion of the electrical power provided by the one or more renewable power generation units into gas; and Based on one or more parameters determined for the gas transmission network, the renewable power plant is controlled to introduce at least a portion of the converted gas into the gas transmission network in order to improve the stability of the gas transmission network.

[0047] The control device of the second aspect has the corresponding advantages mentioned above for the method of controlling a renewable power plant according to the first aspect of the present invention.

[0048] It should be understood that all embodiments described for the method aspect also apply to the control device aspect of the present invention. Therefore, all embodiments described for the method aspect can be executed by a control device, which may include one or more controllers, control units, or control devices. The embodiments of the control device have advantages corresponding to those mentioned above for the method and its embodiments.

[0049] According to a third aspect of the invention, a renewable power plant is provided. The renewable power plant includes one or more renewable power generation units and one or more electricity-to-gas conversion units, and is connected to a gas transmission network. The renewable power plant further includes the control device described herein.

[0050] The third aspect of the renewable power plant has the corresponding advantages mentioned above for the method and embodiments of controlling a renewable power plant according to the first aspect of the invention.

[0051] According to a fourth aspect of the invention, the above and other objectives are achieved by a computer program or computer-readable medium comprising instructions that, when executed by a computer, cause the computer to perform one or more methods according to any of the methods and embodiments described above or below. The advantages of the computer program or computer-readable medium according to the fourth aspect correspond to the advantages described above or below of the methods and embodiments according to the first aspect.

[0052] According to one aspect of the invention, the aforementioned computer program and / or computer-readable medium are configured to implement the methods and embodiments thereof described herein.

[0053] The features and implementation methods of the above-described methods, computer programs, computer-readable media, control devices, and renewable power plants can be combined in various possible ways to provide further advantageous implementation methods.

[0054] Further advantageous embodiments of the method and control apparatus for controlling a renewable power plant, as well as further advantages of the embodiments of the invention, will become apparent from the detailed description of the embodiments. Attached Figure Description

[0055] Embodiments of the invention will now be described in more detail by way of example only and with reference to the accompanying drawings, wherein similar reference numerals are used to denote similar parts, in which: Figure 1This is a schematic diagram illustrating an implementation of a renewable power plant, the implementation described herein being applicable to such a renewable power plant; Figure 2 It is shown Figure 1 A schematic diagram illustrating the implementation of a wind turbine generator in a power plant; Figure 3 It is shown Figure 1 A schematic diagram illustrating the implementation of an X-unit in a power plant; Figure 4 This is a schematic flowchart illustrating methods according to various aspects and embodiments of the present invention; and Figure 5 This is a schematic diagram illustrating an embodiment of a control device according to a second aspect of the present invention, in which any of the methods and embodiments described herein can be implemented. Detailed Implementation

[0056] Figure 1 A non-limiting example of a renewable power plant 100 is schematically shown, in which aspects and embodiments of the invention can be implemented. Of course, aspects and embodiments of the invention can be implemented in any suitable renewable power plant, utilizing one or more renewable power generation units and one or more electricity-to-gas units, and connected to a gas transmission network. Therefore, aspects and embodiments of the invention are not limited to... Figure 1 This is implemented in an example of a renewable power plant.

[0057] Renewable power plant 100 is arranged to provide electrical power or energy to grid 116. Renewable power plant 100 includes one or more renewable power generation units 103, such as wind turbine generators 101. According to some embodiments, renewable power plant 100 may also include one or more other renewable power generation units / assets 103, such as photovoltaic generators 102, such as photovoltaic panels, solar panels, or solar cells. Wind turbine generators 101 and photovoltaic generators 102 can also be generally described as renewable power sources 103 of renewable power plant 100, or renewable generators 103 of renewable power plant 100. Other renewable power generation units 103, such as one or more fuel cells 104, may also be included in renewable power plant 100. The one or more fuel cells 104 may, for example, include one or more hydrogen fuel cells and may be configured to convert hydrogen and oxygen into electrical power by utilizing a redox reaction. The hydrogen used in this conversion can be generated, for example, by a power-to-gas (P2G) unit 120 in the renewable power plant 100, and can be temporarily stored in an internal hydrogen storage device 122 of the renewable power plant 100 as described below. The renewable power plant 100 may also include one or more additional renewable power sources or generators 103, such as one or more battery energy storage systems 106, which may include one or more battery cells.

[0058] The renewable power plant 100 may also include additional assets / units / components, such as one or more harmonic filters and / or one or more reactive power compensation units. These additional assets / units / components are... Figure 1 The term 107 is schematically referred to as another asset / unit / component.

[0059] Renewable power plant 100 can be connected to power grid 116 via a point of common coupling (PCC) 115 (possibly via its internal power grid 110). Renewable power generation unit 103 feeds / provides the electrical power it generates to the internal power grid 110, which is connected to the external power grid 116 via PCC 115. In some implementations, power grid 116 may be referred to as a utility grid, power grid, power network, or electricity grid.

[0060] The renewable power plant 100 further includes one or more electricity-to-X (E2X) units, each comprising one or more electricity-to-gas (E2G) units 120. The E2X units are configured to convert electrical power from the renewable power plant 100 into X, in this case, into gas. Therefore, the E2X units may include electricity-to-gas (P2G) units 120, each including an electrolyzer system 121 configured to convert electrical power from the renewable power plant 100 into gas. The P2G units 120 can be described as dynamic electrical loads. The one or more electrolyzer systems 121 are arranged to decompose water molecules into their constituent components, namely hydrogen and oxygen, by consuming electricity. Each P2G unit 120, including one or more electrolyzer systems 121, may also generate heat during the electrolysis process.

[0061] Optionally, the renewable power plant 100 may also include one or more power plant extension units 130, which can convert hydrogen produced by one or more electro-gas units 120 (i.e., by one or more electrolyzer systems 121, respectively) into other products by consuming electricity. The power plant extension unit 130 may be described as a static or semi-static electrical load and may include one or more chemical units / plants that utilize hydrogen and possibly other compounds or elements (e.g., nitrogen or carbon dioxide) to produce other industrial products (e.g., electronic fuels). The power plant extension unit 130 may also include, for example, an ammonia production plant and / or a methanol production plant. The resulting industrial products (e.g., electronic fuels) may be stored locally in a product storage unit 131 or may be provided directly for subsequent transportation.

[0062] One or more interfaces (e.g., a common coupling point 115 connected to an external power grid 116) can provide the possibility of outputting surplus power generated by the renewable generator 103 of the renewable power plant that is not used by one or more power-to-gas units 120 (including electrolyzer system 121) and downstream power plant extension units 130 to the power grid 116. Correspondingly, one or more external interfaces 125 can be implemented to output hydrogen generated by the power-to-gas units 120 (i.e., electrolyzer system 121) in the renewable power plant 100 to a hydrogen or natural gas network 126, i.e., to a gas transmission / distribution network / power grid 126. One or more external interfaces 127 can be further implemented to output heat generated by one or more power-to-gas units 120 in the renewable power plant 100 to a heat network 128, i.e., to a heat transmission / distribution network 128. Furthermore, one or more interfaces 135 can be implemented to output industrial products (e.g., electronic fuel) generated by the power plant extension unit 130 to a power grid 136 for industrial products (e.g., electronic fuel).

[0063] One or more interfaces 115 connected to an external power grid 116 can also provide the possibility of inputting electrical power from the external power grid 116 to the renewable power plant 100. Correspondingly, one or more external interfaces 125 connected to a gas transmission / distribution network 126 can provide the possibility of inputting gas from the gas transmission / distribution network 126 to the renewable power plant 100. In addition, one or more external interfaces 127 connected to a heat transmission / distribution network 128 can provide the possibility of inputting heat from the heat transmission / distribution network 128 to the renewable power plant 100. Furthermore, one or more interfaces 135 connected to a power grid 136 for industrial products can provide the possibility of inputting industrial products from the power grid 136 for industrial products to the renewable power plant 100.

[0064] Renewable power plant 100 may include a control device 150 configured to control the renewable power plant 100. According to some embodiments, the control device 150 may include, or be referred to as, a power plant controller (PPC). Figure 1 As schematically shown, a control device 150, in the form of a power plant controller, controls a renewable power generation unit 103, a battery system 106, additional assets / units / components 107, an internal power grid 110, one or more power-to-gas units 120, a power plant expansion unit 130, and / or a product storage device 131. The power plant controller 150 can also communicate with an external power grid 116, a gas transmission network 126, a heating network 128, and / or a power grid 136 for industrial products and / or their respective interfaces 115, 125, 127, 135. Furthermore, measured values ​​(e.g., measurements of electrical power or other system parameters and / or attributes) are provided to the control device 150 from one or more of the renewable power generation unit 103, battery system 106, additional assets / units / components 107, internal power grid 110, one or more power-to-gas units 120, power plant expansion unit 130, and product storage device 131. Measurements can also be provided by one or more of the external power grid 116, gas transmission network 126, heat transmission / distribution network 128, and power grid 136 for industrial products, and / or from their respective interfaces 115, 125, 127, 135.

[0065] Therefore, the renewable power plant 100 (also referred to as an E-to-X power plant) utilizes renewable energy sources, such as wind and solar, to generate electricity using a renewable generator 103 (e.g., a wind turbine generator 101 and / or a photovoltaic generator 102). The generated electricity can be supplied to an external power grid 116 and / or used to produce hydrogen, natural gas, heat, and / or industrial products (e.g., electronic fuels). The generated electricity, hydrogen, natural gas, heat, and / or industrial products can then be output to the external power grid 116, an external gas transmission network 126, an external heat transmission / distribution network 128, and / or an external industrial product grid 136, respectively.

[0066] exist Figure 2 The diagram illustrates the point. Figure 1 One embodiment of a wind turbine generator 101 in a renewable power plant 100. The wind turbine generator 101 may include a rotor 161, which includes one or more blades 162, such as two or more blades, such as three or more blades. The wind turbine generator 101 may include a tower 163 and a nacelle 164 mounted on top of the tower 163. The rotor 161 may be connected (e.g., rotatably connected or mounted) to the nacelle 164. The wind turbine generator 101 may include a generator 165, to which the rotor 161 is connected. The rotor 161 is configured to drive the generator 165. The nacelle 164 may house the generator 165.

[0067] Rotor 161 can be rotated by the action of wind. The wind-induced rotational energy of blades 162 and rotor 161 can be transferred to generator 165 via coupling 166 (e.g., including one or more shafts). Therefore, wind turbine generator 101 can be described as being configured to convert the kinetic energy of wind into mechanical or rotational energy through blades 162, and subsequently into electrical power through generator 165. Wind turbine generator 101 may include one or more power converters 167 connected to generator 165. Wind turbine generator 101 and / or generator 165 may be connected to power grid 116 via one or more power converters 167. The one or more power converters 167 may include a first power converter for converting alternating current (AC) from generator 165 to direct current (DC). The one or more power converters 167 may include a second power converter for converting DC from the first power converter to AC for supplying to power grid 116. Nacelle 164 may house the one or more power converters 167, or the one or more power converters 167 may be located elsewhere.

[0068] The wind turbine generator 101 may be controlled by or may include a control device 168 for controlling the wind turbine generator 101. The control device 168 may include a wind turbine generator controller. The control device 168 may be configured to communicate with and / or connect to a control device 150 of the power plant 100, or be part of the control device 150. In some embodiments, the wind turbine generator 101 may be referred to as a variable-speed wind turbine generator. It should be understood that the wind turbine generator 101 may include additional units, components, and / or equipment (e.g., sensors) required for the wind turbine generator 101. In some embodiments, and as... Figure 2 As schematically shown, the electro-to-X unit 120, i.e., the electro-to-gas unit 120, can be connected (more specifically, electrically connected) to the connection point of the wind turbine generator 101, so that it can draw electrical power generated by the wind turbine generator 101 to generate X. In some embodiments, the wind turbine generator 101 and the electro-to-X unit 120 can be arranged together as a single unit. However, in some embodiments, the electro-to-X unit 120 can be located elsewhere in the renewable power plant 100 and / or connected to other locations within the renewable power plant 100.

[0069] Figure 3 It was made public. Figure 1 This embodiment of the power plant 100 includes a power-to-X (P2X) unit (here, a power-to-gas (P2G) unit 120) configured to convert electrical power from the renewable power plant 100 into gas. According to the various embodiments described herein, the power-to-gas unit 120 can be configured to convert electrical power generated by the renewable power plant 100 itself and / or use input electrical power to produce a gas or gas mixture comprising or consisting of hydrogen, oxygen, and / or methane. Figure 3 In the illustrated embodiment, the electro-gas unit 120 is configured to convert electrical power from the renewable power plant 100 (i.e., electrical power generated within and / or input to the renewable power plant 100) into a gaseous mixture containing hydrogen and oxygen. The electro-gas unit 120 can be described as being configured to use electricity to decompose water into hydrogen and oxygen using a process called electrolysis in an electrolyzer system 121. Thus, hydrogen is produced by electrolysis, which can be used, for example, as fuel. The electro-gas unit 120 may include a container 322 configured to hold or contain water. The electro-gas unit 120, i.e., the electrolyzer system 121, may include one or more anodes 323 and one or more cathodes 324 spaced apart from each other by membranes 325. The container 322 may include an outlet 326 for hydrogen and an outlet 327 for oxygen. The produced hydrogen may be stored in an internal hydrogen storage device 122 of the renewable power plant 100.

[0070] refer to Figure 3 In some implementations, the electro-gas conversion unit 120 includes an electrolyzer system 121, which includes one or more of the following groups: - Alkaline electrolyzer; - Non-pressurized alkaline electrolyzer; -Pressurized alkaline electrolyzer; -Proton exchange membrane electrolyzer; - Non-pressurized proton exchange membrane electrolyzer; -Pressurized proton exchange membrane electrolyzer; - Polymer electrolyte membrane electrolyzer; - Non-pressurized polymer electrolyte membrane electrolyzer; - Pressurized polymer electrolyte membrane electrolyzer; and - Solid oxide electrolyzer (SOEC).

[0071] like Figure 2 and Figure 3 As shown, in some embodiments, the power-to-gas unit 120 may be connected (more specifically, electrically connected) to the connection point of the wind turbine generator 101. In some embodiments, the power-to-gas unit 120 may be connected (more specifically, electrically connected) to the connection point of the renewable power plant 100. In some embodiments, the power-to-gas unit 120 may be connected (more specifically, electrically connected) to the connection point / external interface (e.g., common coupling point 115) between the renewable power plant 100 and the power grid / grid 116, and to the connection point / external interface 125 between the renewable power plant 100 and the gas transmission / distribution network 126.

[0072] It should be understood that the electro-gas conversion unit 120 may include more units than those described herein, such as other components and / or equipment required for the effective operation of the electro-gas conversion unit 120, such as pumps, vents, tanks, and / or separators. It should be understood that, in addition to Figure 3 Besides the electro-gas conversion unit 120 disclosed in the paper, other implementations are also possible.

[0073] As mentioned above, regulation of renewable power plants can be controlled by national transmission system operators, local district heating companies, and / or supranational agencies for electricity or gas. Therefore, control systems and strategies are needed that conform to network specifications (including, for example, specific attribute sets) of the transmission / distribution networks / grids for electricity, gas, and / or heat to provide reliable regulation for renewable power plants.

[0074] For example, in a European context, energy nodes configured to exchange electricity from renewable power plants for gaseous fuels can be regulated by European national electricity or gas transmission system operators. Furthermore, energy nodes configured to exchange low-grade heat can be regulated by European local district heating companies. European national electricity and gas transmission system operators are coordinated by supranational bodies such as the European Network of Operators of Transmission Systems (ENTSO-E) and the European Network of Operators of Transmission Systems (ENTSO-G).

[0075] Both ENTSO-E and ENTSO-G monitor and analyze the implementation of network specifications that clearly define a specific set of attributes that electricity and gas distributors must meet in order to have a coordinated and integrated energy market within the EU.

[0076] Therefore, renewable power plants within Europe may be required to comply with the ENTSO-E network specifications, the ENTSO-G network specifications, both ENTSO-E and ENTSO-G network specifications, or neither, depending on the configuration of the renewable power plant and the available energy infrastructure. Outside of Europe, relevant organizations / institutions may determine the corresponding network specifications for other countries / regions / continents that renewable power plants in those countries / regions / continents must adhere to.

[0077] Therefore, it may be necessary to develop control systems and control strategies that can simultaneously comply with network specifications for electricity, gas, and / or heat distribution transmission / distribution networks / grids. Even where regulatory agencies do not enforce network specifications, the renewable power plant 100 still needs to produce energy based on a specific set of properties (e.g., voltage, frequency, pressure, and / or temperature) according to the energy carrier for reliable operation.

[0078] Imbalances in the external gas transmission / distribution network 126 to which the renewable power plant 100 is connected are not permitted according to the network specifications of the gas transmission / distribution network 126. For example, unstable gas flow rates, unstable gas pressures, and / or changes in the amount of gas in the gas transmission / distribution network 126 due to such imbalances may cause the gas transmission / distribution network 126 to fail to meet its network specifications.

[0079] Figure 4 A flowchart is shown for a method 200 for controlling a renewable power plant 100, wherein the renewable power plant 100 includes one or more renewable power generation units 103 and one or more electricity-to-gas units 120. The renewable power plant 100 is further connected to a gas transmission network 126, as described above.

[0080] In the first step 210 of method 200, one or more parameters of the gas transport network 126 are determined.

[0081] According to various embodiments, the determined one or more parameters of the gas transport network 126 may include the pressure of the gas transport network 126, the gas flow rate of the gas transport network 126, the gas flow direction of the gas transport network 126, the gas volume of the gas transport network 126, the quantity of one or more gases at one or more locations in the gas transport network 126, and / or a setpoint for the renewable power plant 100. At least some of the determined one or more parameters may be typically fluctuating / non-stationary parameters that change relatively slowly over time. At least one of the determined one or more parameters may correspond to at least one of the network specifications of the gas transport network 126.

[0082] In the second step 220, based on the one or more parameters determined by the gas transport network 126, one or more electro-gas conversion units 120 are controlled to convert electrical power, at least partially provided by one or more renewable power generation units 103, into gas. According to various embodiments, therefore, based on the one or more parameters determined by the gas transport network 126, control 220 of one or more electro-gas conversion units 120 converts electrical power into gas or a gas mixture, said gas or gas mixture comprising or consisting of hydrogen, oxygen, and / or methane.

[0083] Therefore, one or more power-to-gas units 120 are connected to one or more renewable power generation units 103 and are configured to draw electrical power generated by the one or more renewable power generation units 103 when producing gas. Thus, the power-to-gas unit 120 can be configured to convert electrical power into gas, wherein the electrical power is provided by one or more renewable power sources / assets / units 103 of the renewable power plant 100, including, for example, one or more wind turbine generators 101 and / or one or more photovoltaic generators 102. Furthermore, for some embodiments described below, the power-to-gas unit 120 can be connected to the power grid 116 and can be configured to convert electrical power input from the power grid 116 into gas.

[0084] In the third step 230, based on the determined parameters of the gas transmission network 126, the renewable power plant 100 is controlled to introduce at least a portion of the converted gas into the gas transmission network 126 to improve the stability of the gas transmission network 126. Therefore, the renewable power plant 100 here supplies / injects gas into the gas transmission network 126, thereby counteracting any imbalances / instabilities in the gas transmission network 126 that may be caused by reduced or increased flow rate, pressure, and gas quantity in the gas transmission network 126.

[0085] according to Figure 4In one embodiment illustrated in the flowchart, method 200 further includes a step of determining 211 instability / imbalance of the gas transport network 126 based on the determined one or more parameters of the gas transport network 126. This determination 211 of instability / imbalance can be performed by detecting whether the determined one or more parameters of the gas transport network 126 exceed their respective limits / thresholds.

[0086] It should be noted that at least one of the determined parameters is a parameter of overall fluctuation / change. Fluctuations / changes in parameter values ​​can indicate the stability level of the gas transport network 126. For such normally fluctuating / changing parameters, corresponding limits / thresholds can be defined to detect whether the determined parameter fluctuates / changes too much. Therefore, according to one embodiment, the limits / thresholds for normally fluctuating parameters can indicate the amplitude threshold A of these fluctuations / changes. th The amplitude threshold should not be exceeded by the amplitude A of the parameter. In other words, if at least one of the determined parameters of the gas transmission network 126 exceeds its fluctuation amplitude threshold A... th The amplitude A fluctuates, that is, A>A th This indicates that the 211 gas transport network 126 is unstable / unbalanced. Furthermore, limits / thresholds can also indicate how these fluctuations / changes change over time, and which should not be exceeded by the parameters.

[0087] After an instability / imbalance may have been identified 211, the control 220 of electrical power to gas conversion performed by one or more electro-gas conversion units 120 is based on the identified instability / imbalance of the gas transport network 126.

[0088] according to Figure 4 In one embodiment shown in the flowchart, the renewable power plant 100 is connected to the power grid 116, such as... Figure 1 As shown. Therefore, method 200 further includes the step of inputting 212 electrical power from the power grid 116 to the renewable power plant 100 based on the one or more parameters determined by the gas transmission network 126.

[0089] Then, one or more power-to-gas units 120 are controlled to convert at least a portion of the electrical power input from the power grid 116 into gas. The power-to-gas units 120 are also controlled to convert electrical power supplied by one or more renewable power generation units 103 into gas. The conversion of electrical power input from the external power grid 116 and electrical power generated by one or more renewable power generation units 103 of the renewable power plant 100 into gas is based on the one or more parameters determined by the gas transmission network 126. The converted gas is then introduced into the gas transmission network at 230.

[0090] according to Figure 4 In one embodiment illustrated in the flowchart, method 200 further includes the step of determining one or more parameters of the power grid 116 in addition to the determined parameters of the gas transport network 126. Then, the input 214 from the power grid 116 to the renewable power plant 100 for converting at least a portion of the input electrical power into gas is also based on the determined parameters of the power grid 116. Therefore, here, electrical power is input from the power grid 214 based on the determined parameters of the gas transport network 126 and the determined parameters of the power grid. Then, based on the determined parameters of the gas transport network 126, the electrical power input from the power grid 214 is converted into gas. Then, based on the determined parameters of the gas transport network 126, at least a portion of the converted gas is introduced 230 into the gas transport network.

[0091] According to one embodiment, control 220 of the one or more electro-gas conversion units 120 includes controlling the one or more electro-gas conversion units to avoid inputting electrical power, and instead convert only the electrical power generated / provided by the one or more renewable power generation units into gas. Then, based on the determined one or more parameters of the gas transport network 126, at least a portion of the thus converted gas can be introduced into the gas transport network 126 to improve the stability of the gas transport network 126. Since no electrical power is input here for converting electrical power into gas, this ensures that the electrical power originates solely from renewable power sources.

[0092] according to Figure 4 In one embodiment illustrated in the flowchart, method 200 further includes the step of allocating the power generation capacity of renewable power plant 100 based on one or more determined parameters of gas transport network 126. This allocation is provided by controlling renewable power plant 100 to operate in a so-called derating mode, in which not all of the renewable power plant's power generation capacity is fully utilized. Then, control 216 allows one or more renewable power generation units 103 to generate electrical power by utilizing the allocated power generation capacity. Control 220 allows one or more electro-gas conversion units 120 to convert at least a portion of the thus generated electrical power into gas, which can then be introduced 230 into gas transport network 126.

[0093] Therefore, a potential / virtual power reserve / storage is created / released in the renewable power plant 100, which can be used for gas production if needed. In other words, a power reserve is allocated that can be used to produce gas, which can then be introduced into the gas transmission network 126 if required.

[0094] according to Figure 4In one embodiment shown in the flowchart, method 200 further includes the step of determining 217 that an imbalance exists in the gas transport network 126 if one or more of the following conditions or events occur. These conditions or events may include: at least one of the determined one or more parameters of the gas transport network 126 is below a preset threshold P. th If the value of P is , then P <P th These conditions or events may also include: at least one of the determined parameters of the gas transport network 126 exceeding a preset change magnitude threshold M with a change magnitude M over time. th The gradient fluctuates, i.e., M > M th .

[0095] When an imbalance is determined to exist in the gas transport network 126, method 200 includes controlling 220 one or more power-to-gas units 120 to convert electrical power from the renewable power plant 100 into gas based on the determined parameters of the gas transport network 126. Furthermore, method 200 includes controlling 230 the renewable power plant 100 to introduce at least a portion of the converted gas into the gas transport network 126 based on the determined parameters of the gas transport network 126 to counteract the determined imbalance in the gas transport network 126.

[0096] according to Figure 4 In one embodiment illustrated in the flowchart, one or more parameters 210 are determined at point 125 of concern, at which one or more requirements of the gas transmission network 126 will be met. According to some embodiments, these requirements may correspond to and / or be included in gas transmission network / grid specifications.

[0097] In this document, all points of interest, points of common coupling (PCC), and interconnection points refer to a single point, such as the point / node / location where two or more networks meet, for example, the point where the obligations / responsibilities of renewable power plant 100 terminate and the obligations / responsibilities of gas supplier and / or transmission network 126 begin. This can also be described as the point where renewable power plant 100 stops and gas network 126 begins.

[0098] Then, based on the one or more parameters determined at point 125 of interest, one or more reference values ​​221 are issued to the renewable power plant 100. According to one embodiment, the issued reference values ​​may be, correspond to, and / or include setpoints intended for use throughout the renewable power plant 100 and / or reference points intended for use with individual entities within the renewable power plant 100. According to one embodiment, the step of issuing reference values ​​221 further includes calculating the reference values ​​based on the one or more parameters determined at point 125 of interest.

[0099] Then, in the renewable power plant 100, based on the one or more reference values ​​issued, one or more power-to-gas units 120 are controlled to convert electrical power into gas. Therefore, the issued reference values ​​are received by the renewable power plant 100 and used to control the process of converting electrical power into gas in one or more power-to-gas units 120.

[0100] Then, based on the one or more parameters determined at point 125, control 230 of the renewable power plant 100 to introduce at least a portion of the converted gas into the gas transmission network 126 in order to meet the one or more requirements at point 125.

[0101] According to a second aspect, a control device 150 configured to control a renewable power plant 100 is proposed. As described above, the renewable power plant 100 includes one or more renewable power generation units 103 and one or more electricity-to-gas units 120. The renewable power plant 100 is connected to a gas transmission network 126.

[0102] The control device 150 is configured to determine one or more parameters of the gas transmission network 126 210, as described above.

[0103] The control device 150 is further configured to control one or more electro-gas conversion units 120 to convert electrical power, at least partially provided by one or more renewable power generation units 103, into gas based on the determined parameters of the gas transmission network 126, as described above.

[0104] The control device 150 is also configured to control the renewable power plant 100 230 to introduce at least a portion of the converted gas into the gas transmission network 126 based on the determined parameters of the gas transmission network 126, in order to improve the stability of the gas transmission network 126.

[0105] refer to Figure 1 The renewable power plant 100 may include a control device 150 for controlling the power plant 100 according to any of the methods and / or implementations disclosed herein. The control device 150 may include, or be referred to as, a power plant controller (PPC).

[0106] According to a third aspect, a renewable power plant 100 is proposed. The renewable power plant 100 includes one or more renewable power generation units 103 and one or more electricity-to-gas units 120, and is connected to a gas transmission network 126, such as... Figure 1 As shown schematically, the renewable power plant 100 further includes a control device 150 as described herein.

[0107] The control device 150 may be further configured (e.g., including units / devices / equipment 410, 411, 412, 413, 414, 415, 416, 417, 420, 421, 422, 430) to perform / provide / implement further method steps 210, 211, 212, 213, 214, 215, 216, 217, 220, 221, 222, 230 as described herein according to the various embodiments above.

[0108] Those skilled in the art will understand that the method aspects and implementations for controlling a renewable power plant 100 described herein can also be implemented in a computer program, which, when executed in a computer, instructs the computer to perform the method. The computer program is typically a computer program product 503 stored on a non-transitory / non-volatile digital storage medium. Figure 5 (As shown in the diagram) constitutes a computer program incorporated into a computer-readable medium of a computer program product. The computer-readable medium includes suitable memory such as ROM (Read-Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable PROM), flash memory, EEPROM (Electrically Erasable PROM), hard disk units, etc.

[0109] Figure 5 An embodiment of a control device 150 according to one aspect of the present invention is illustrated schematically. The device may include a control unit 500, which may be arranged / configured to execute / implement one or more of the above-described method steps 210, 211, 212, 213, 214, 215, 216, 217, 220, 221, 222, 230. The control unit 500 may include a computing unit 501, which may be composed of substantially any suitable type of processor or microcomputer, such as circuitry for digital signal processing (Digital Signal Processor, DSP), or circuitry with a preset specific function (Application-Specific Integrated Circuit, ASIC). The computing unit 501 is connected to a storage unit 502 disposed within the control unit 500. The storage unit 502 provides the computing unit 501 with, for example, stored program code and / or stored data, which the computing unit 501 requires to perform calculations. The computing unit 501 is also arranged to store partial or final calculation results in the storage unit 502.

[0110] Furthermore, the control unit 500 may be equipped with devices 511, 512, 513, and 514 for receiving and transmitting input and output signals. These input and output signals may include waveforms, pulses, or other attributes, which can be detected as information by the devices 511 and 513 for receiving input signals and can be converted into signals that can be processed by the computing unit 501. These signals are then provided to the computing unit 501. The devices 512 and 514 for transmitting output signals are arranged to convert the signals received from the computing unit 501 to create output signals by, for example, modulating signals. These output signals may be transmitted, for example, to the power grid 116, gas transmission network 126, heat transfer / distribution network 128, power grid 136 for industrial products, and / or renewable power plant 100 (see...). Figure 1 Other parts and / or systems, or related parts and / or systems. Connections to each of the devices used for receiving and transmitting input and output signals may consist of one or more of cables, data buses, and wireless connections.

[0111] Throughout this document, and indeed herein, control units are generally described as steps provided for performing methods according to aspects and embodiments of the invention described herein. This also includes units designed and / or configured to perform these method steps. For example, a control unit may include one or more control entities arranged to perform one or more of the method steps 210, 211, 212, 213, 214, 215, 216, 217, 220, 221, 222, 230 described herein, respectively. These control entities may, for example, correspond to sets of instructions (which may be in the form of programming code) that are input to and utilized / executed by the processor / computing unit 501 of the control unit 500 when the entity is activated and / or used to perform its respective method steps. Such control entities may be implemented as separate entities among multiple control units, or may be logically separate but physically implemented in the same control unit, or may be arranged together both logically and physically.

[0112] refer to Figure 1 The control device 150 (which may include one or more control units or control entities 410, 411, 412, 413, 414, 415, 416, 417, 420, 421, 422, 430, such as one or more devices, controllers, or control devices) may be arranged to perform all the method steps mentioned above, in the claims, and in connection with the aspects and embodiments described herein. The control device 150 is associated with the aforementioned advantages of each method embodiment.

[0113] The aspects and implementation methods described herein can also be applied to other power plant sectors besides the renewable / electricity-to-X power plant sector mentioned herein. For example, the aspects and implementation methods described herein can be applied to virtual power plants or the aggregation of flexible energy loads with their respective constraints.

[0114] This invention is not limited to the embodiments described above. Rather, this invention relates to and includes all different embodiments encompassed within the scope of the independent claims.

Claims

1. A method (200) for controlling a renewable power plant (100), the renewable power plant comprising one or more renewable power generation units (103) and one or more power-to-gas units (120), the renewable power plant (100) being connected to a gas transmission network (126), wherein, The method (200) includes: Determine (210) one or more parameters of the gas transport network (126); Based on the one or more parameters determined by the gas transport network (126), control (220) the one or more electro-gas conversion units (120) to convert at least a portion of the electrical power provided by the one or more renewable power generation units (103) into gas; and Based on the determined parameters of the gas transmission network (126), the renewable power plant (100) is controlled (230) to introduce at least a portion of the converted gas into the gas transmission network (126) in order to improve the stability of the gas transmission network (126).

2. The method (200) according to claim 1, further comprising: Based on the determined parameters of the gas transport network (126), the instability of the gas transport network (126) is determined (211). as well as Based on the instability of the determined gas transmission network (126), the one or more electro-gas conversion units (120) are controlled (220) to convert electrical power into gas.

3. The method (200) according to claim 2, wherein, If at least one of the determined parameters of the gas transport network (126) exceeds the fluctuation amplitude threshold A th The amplitude A fluctuates, that is, A > A th Therefore, it is determined that the gas transport network (126) is unstable.

4. The method (200) according to any one of claims 1-3, wherein, The renewable power plant (100) is connected to the power grid (116), wherein the method (200) further includes: Based on the one or more parameters determined by the gas transmission network (126), electrical power is input (212) from the power grid (116) to the renewable power plant (100); and Based on the one or more parameters determined by the gas transport network (126), the one or more electric-to-gas units (120) are controlled (220) to convert at least a portion of the electrical power input from the power grid (116) into gas, in addition to the electrical power provided by the one or more renewable power generation units (103).

5. The method (200) according to claim 4, wherein, The method (200) further includes: Determine (213) one or more parameters of the power grid (116); and Based on the one or more parameters determined by the power grid (116), electrical power is input (214) from the power grid (102) to the renewable power plant (100) for use in converting at least a portion of the electrical power input from the power grid (116) into gas.

6. The method (200) according to any one of claims 1-3, wherein, The one or more electro-gas conversion units (120) are controlled (220) to convert only the electrical power provided by the one or more renewable power generation units (103) into gas.

7. The method (200) according to any one of claims 1-6, wherein, The determined parameters of the gas transport network (126) fluctuate over time, and the fluctuations indicate the stability of the gas transport network (126).

8. The method (200) according to any one of claims 1-7, wherein, The method (200) further includes: Based on the one or more parameters determined by the gas transmission network (126), the power generation capacity of the renewable power plant (100) is allocated (215); Control (216) the one or more renewable power generation units (103) to generate electrical power by utilizing the allocated power generation capacity; and Control (220) the one or more electro-gas conversion units (120) to convert at least a portion of the generated electrical power into gas.

9. The method (200) according to any one of claims 1-8, wherein, The method (200) further includes: If one or more of the following conditions or events are valid, then an imbalance is determined to exist in the gas transport network (126) (217): • At least one of the determined parameters of the gas transport network (126) is below a preset threshold P. th The value of P, that is, P < P th ;as well as • At least one of the determined parameters of the gas transport network (126) exceeds a preset change magnitude threshold M with a change magnitude M over time. th The gradient fluctuates, i.e., M > M th ;as well as When an imbalance is determined in the gas transmission network (126), based on the determined parameters of the gas transmission network (126), the one or more electro-gas conversion units (120) are controlled (220) to convert electrical power from the renewable power plant (100) into gas; and Based on the determined parameters of the gas transmission network (126), the renewable power plant (100) is controlled (230) to introduce at least a portion of the converted gas into the gas transmission network (126) in order to counteract any imbalance in the determined gas transmission network (126).

10. The method (200) according to any one of claims 1-9, wherein, The determined parameters of the gas transport network (126) include one or more of the following groups: • Pressure of the gas transmission network (126); • Gas flow rate of the gas transmission network (126); • The direction of gas flow in the gas transport network (126); • Gas volume of the gas transport network (126); • One or more quantities of gas at one or more locations in the gas transport network (126); and • Set point for renewable power plants (100).

11. The method (200) according to any one of claims 1-10, wherein, Each of the one or more electro-to-gas units (120) is configured to convert electrical power into gas by utilizing an electrolyzer system (121).

12. The method (200) according to any one of claims 1-11, wherein, The method (200) further includes: Based on the one or more parameters determined by the gas transport network (126), the one or more electro-gas conversion units (120) are controlled (220) to convert electrical power into gas or a gas mixture, the gas or gas mixture comprising or consisting of one or more of the following: ·hydrogen; Oxygen; and Methane.

13. The method (200) according to any one of claims 1-12, wherein, The one or more renewable power generation units (103) include one or more of the following groups: • Wind turbine generator (101) of renewable power plant (100); • Photovoltaic generator (102) of renewable power plant (100); • Battery energy storage system (106) for renewable power plant (100); and • Fuel cell (104) of renewable power plant (100).

14. The method (200) according to any one of claims 1-13, wherein, The method (200) further includes: At the point of interest (125), one or more parameters (210) are determined, at which one or more requirements of the gas transport network (126) will be met; Based on the one or more parameters determined at the point of interest (125), one or more reference values ​​(221) are issued to the renewable power plant (100); Based on the one or more reference values ​​issued, control (222) the one or more electro-gas conversion units (120) to convert electrical power into gas; and Based on the one or more parameters determined at the point of interest (125), the renewable power plant (100) is controlled (230) to introduce at least a portion of the converted gas into the gas transmission network (126) in order to meet the one or more requirements at the point of interest (125).

15. A computer program (703) or computer-readable medium comprising instructions that, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 14.

16. A control device (150) for controlling a renewable power plant (100), wherein, The renewable power plant (100) includes one or more renewable power generation units (103) and one or more power-to-gas units (120), and is connected to a gas transmission network (126), wherein the control device (150) is configured to: Determine (210) one or more parameters of the gas transport network (126); Based on the one or more parameters determined by the gas transport network (126), control (220) the one or more electro-gas conversion units (120) to convert at least a portion of the electrical power provided by the one or more renewable power generation units (103) into gas; and Based on the determined parameters of the gas transmission network (126), the renewable power plant (100) is controlled (230) to introduce at least a portion of the converted gas into the gas transmission network (126) in order to improve the stability of the gas transmission network (126).

17. A renewable power plant (100) comprising one or more renewable power generation units (103) and one or more power-to-gas units (120), and connected to a gas transmission network (126), wherein, The renewable power plant includes the control device (150) according to claim 16.

Images