Portable control panel for conducting experiments with energy generation systems, preferably with water wheels.

Abstract

The invention relates to a portable control panel for conducting experiments with energy generation systems, preferably with waterwheels, comprising a housing (16) wherein at least one measuring device (13) is accommodated in the housing (16), to which electrical energy generated by an energy generation system, preferably by a generator of an energy generation system, most preferably by a generator of a waterwheel (2), can be supplied. The at least one measuring device (13) is configured to detect and / or determine at least one value for at least one electrical parameter of the supplied electrical energy, wherein the control panel (1) is associated with at least one display device (14; 41; 44; 47; 50) which is configured to display at least one value of a detected and / or determined electrical parameter.Furthermore, the control panel (1) has several electrical consumers (23) which can be switched on and off individually or in groups, preferably to determine a power curve of the electrical energy supplied to the control panel (1) by the power generation plant.

Description

[0001] The invention relates to a portable control panel for conducting experiments with power generation systems, preferably with water wheels. Furthermore, the invention relates to a method for operating such a control panel coupled to a power generation system.

[0002] Control cabinets for large hydroelectric or wind turbines with high voltage and power are large, heavy, and designed exclusively for stationary use. Using such control cabinets in conjunction with conducting tests at different locations is extremely complex.

[0003] For experiments with smaller wind or water wheels, especially with smaller floating water wheels held in position on the water by holding cables, or with water turbines, commercially available multimeters are used to measure electrical values ​​(voltage, current, power). In order to be able to measure these values ​​simultaneously during the experiment, at least two multimeters are normally required and carried along. The generated power can then be calculated from these values, for example. To determine other parameters, such as the temperature or flow velocity in the area of ​​the water wheel or the tensile forces in the holding cables of a floating water wheel, additional separate measuring setups with sensors and display devices are required. The speed of a water wheel or wind wheel is usually measured or determined using a stopwatch.

[0004] Determining performance curves and other parameters for these small-scale systems is very cumbersome and time-consuming using the methods described above and given the changing conditions during the test process. Especially with "floating hydropower plants" or water turbines, referred to here as floating waterwheels or simply as waterwheels, many factors influence the achievable performance. Consequently, a large number of tests are required to determine these factors, which, in turn, results in a very significant time expenditure when using conventional methods.

[0005] These factors also vary greatly from location to location and therefore have to be determined anew for each location, which requires considerable time.

[0006] The installation of the required measuring devices often involves a considerable amount of time; faulty or incorrect installation can result in damage to the measuring devices and incorrect measurement values.

[0007] The object of the invention is therefore to provide a device and a method by means of which the above-mentioned disadvantages can be eliminated.

[0008] This problem is solved by the features of the independent claims. Advantageous embodiments are the subject of the dependent claims.

[0009] According to claim 1, a mobile, portable and therefore easy-to-handle control panel for conducting experiments with energy generation systems, preferably for conducting experiments with water wheels and / or wind turbines, is proposed, which control panel has a housing, wherein the housing accommodates at least one measuring device to which electrical energy generated by an energy generation system, preferably by a generator of an energy generation system, most preferably by a generator of a water wheel, can be supplied. The at least one measuring device is designed to detect and / or determine at least one value for at least one electrical characteristic of the supplied electrical energy, wherein the control panel is assigned at least one display device which is designed to display at least one value of a detected and / or determined electrical characteristic.Furthermore, the control panel has a plurality of electrical consumers which can be switched on and off individually or in groups, preferably for determining a power curve of the electrical energy supplied to the control panel from the power generation system.

[0010] Even though a water wheel and a water turbine often have structural differences, since a water wheel usually has a relatively large wheel with blades or paddle wheels, while a water turbine is usually a more compact device whose specially shaped blades are installed in a tubular casing so that the water flows through the turbine in a narrow channel, it should be expressly stated at this point that the term "water wheel" or "water wheels" in the context of the present invention is expressly intended to also include "water turbine" or "water turbines", since a water wheel and a water turbine are each devices that can convert the energy of flowing water into mechanical energy, which is then used to generate electrical energy.

[0011] Such a control panel offers a number of advantages: The control panel is mobile and portable, making it easy to transport and deploy at different locations for power generation plant experiments. This increases flexibility and enables use in a variety of environments.

[0012] The control panel is also specifically designed for ease of use and operation. Users can easily measure the electrical energy from the power generation system and display measured values ​​without relying on complex or bulky equipment. Furthermore, all required controls, measuring and display devices, including the electrical loads, can be located on and / or in the control panel (as described in more detail below), thus eliminating time-consuming on-site wiring and the associated potential for errors.

[0013] The control panel is equipped with at least one measuring device that allows for the recording and determination of electrical parameters of the supplied electrical energy. This enables precise measurement and analysis of the power generation plant's performance parameters.

[0014] By attaching a display device to the control panel, the recorded and determined measurement values ​​can be displayed in real time. This facilitates monitoring and control of the power generation plant during tests.

[0015] The ability to switch multiple electrical loads on and off individually or in groups also makes it possible to determine the power curve of the supplied electrical energy. This is particularly important for analyzing the behavior of the power generation system under different load conditions.

[0016] The portable control panel according to the invention thus enables researchers, engineers, students or pupils to carry out practical experiments with power generation systems in order to investigate and optimize the performance, efficiency and behavior of the systems.

[0017] The control panel according to the invention provides precise measurement data that can be analyzed in conjunction with other parameters of the power generation plant. This enables better evaluation and optimization of the plant.

[0018] The control panel also facilitates the understanding and exploration of waterwheels, wind turbines, and other renewable energy generation systems. It contributes to promoting the use of clean and sustainable energy sources.

[0019] Overall, the control panel according to the invention offers a user-friendly and efficient solution for the investigation and analysis of power generation plants. It enables precise measurements, is easy to handle, and opens up possibilities for scientific studies and practical applications in the field of renewable energies.

[0020] The control panel according to the invention can thus integrate all the components required for determining performance curves. These can include, for example, a switchable power supply, display devices for the parameters to be determined, switchable load resistors, and connection options for external devices. The invention is portable and can also be designed in a lightweight construction, allowing it to be easily transported to the respective test sites and connected to the systems to be tested there.

[0021] In principle, all of the electrical parameters of interest and desired can be recorded and / or determined using the control panel according to the invention and, if required, displayed in the desired manner by means of the at least one display device, i.e., for example, displayed individually, in groups, or all together. Of particular interest, in particular for teaching purposes, is that the at least one measuring device is designed to determine a value for the electrical voltage and / or for the electrical current and / or for the electrical power as electrical parameter(s) of the supplied electrical energy and to display it if required. An embodiment is particularly preferred in this case in which the at least one measuring device is designed to determine a value for the electrical voltage and for the electrical current as electrical parameters and, if required, to display it.On the basis of these values, the electrical power can then be calculated independently, for example in the context of a lesson by students or pupils.

[0022] Particularly preferred is an embodiment in which the at least one measuring device is designed not only to determine a value for the electrical voltage and the electrical current, but also for the electrical power and, if appropriate, to display it. This is particularly advantageous for determining performance curves. With the ability to record electrical voltage, current and power, the control panel can provide a comprehensive analysis of the electrical energy generated by the power generation plant. It enables a holistic assessment of the plant's performance and efficiency. This makes it possible to identify potential improvements in order to optimize the plant's performance. By simultaneously recording (and, if appropriate, displaying) voltage, current and power, deviations or problems in the power generation plant can be detected at an early stage.This facilitates fault diagnosis and enables timely maintenance. Simultaneous recording of multiple electrical quantities enables more accurate measurements and reduces the risk of measurement errors. Voltage, current, and power measurements allow for accurate comparisons between different power generation systems, facilitating the selection of the most suitable system for specific applications.

[0023] It goes without saying that it would also be possible, in principle, to simply measure and, if necessary, display the electrical power. The control panel according to the invention offers a wide range of configuration options, and the design of the control panel can thus be easily adapted to the individual wishes and needs of each operator.

[0024] The at least one display device can also be designed individually, preferably in such a way that it is fundamentally possible to display each determined value for one of the detected and / or determined electrical parameters, for example with a mobile terminal that can be coupled to the control panel, such as a mobile phone and / or a laptop, and / or in conjunction with one or more displays arranged on the control panel or housing side, which will be discussed in more detail below.

[0025] The present invention also allows, in a simple manner, the simultaneous, very time-saving and needs-based determination and, if necessary, display of electrical parameters, for example of at least the electrical voltage and the electrical current, preferably also the electrical power of a power generation plant, preferably a water turbine or wind turbine, during the tests.

[0026] The control panel according to the invention is also flexible and can be used in different locations due to its portability, making it ideal for conducting experiments at schools, other educational and research institutions, and for conducting experiments by companies involved in the development of new systems in the field of renewable energies. This compact and relatively inexpensive control panel is also very suitable for interested private individuals.

[0027] The housing can have a power connection via which the electrical energy generated by the power generation system, preferably by a generator of the power generation system, can be easily supplied to the at least one measuring device. The electrical energy can be supplied to the at least one measuring device via at least one cable that runs from the power generation system, preferably from the generator of the power generation system, to the power connection and from there to the measuring device. Wired signal transmission is characterized by low susceptibility to interference and particularly high functional reliability, although wired or wireless signal transmission is of course also an option. Examples of such wireless transmission technologies are WLAN (Wireless Local Area Network) and Bluetooth.

[0028] According to a particularly preferred embodiment, the energy generation plant is formed by a water wheel driven by water (water here represents any suitable liquid or gaseous fluid), preferably by a water wheel held in position by a holding device, for example by means of holding cables as a holding device. Furthermore, a generator (or, in a broader sense, an energy converter) is assigned to the water wheel, which generator can be driven in rotation by means of the water wheel, preferably using a gear and / or a belt drive, to generate electrical energy, wherein the housing, in addition to the energy connection, has at least one further connection via which a signal detected at the water wheel and / or in the region of the water wheel can be fed to the at least one measuring device.In this case, it is particularly advantageous if the housing has at least one connection via which a signal detected at the water wheel and / or in the area of ​​the water wheel can be fed to the at least one measuring device. For example, the housing can have at least one of the connections listed below: - a speed connection to which a speed signal of the water wheel measured by a speed sensor can be fed, - at least one temperature connection to which a temperature signal measured by means of at least one temperature sensor, preferably a temperature signal measured by means of a temperature sensor in the vicinity of or directly on the generator and / or in the vicinity of or directly on the water wheel and / or in the area of ​​the water and / or the environment close to the generator and / or water wheel, can be fed, - a dew point connection to which a dew point signal measured in the area of ​​the water wheel by means of a dew point sensor that measures the relative humidity and the air temperature and calculates the dew point can be fed, - at least one flow velocity connection to which a flow velocity signal measured by a flow velocity sensor, preferably a vane anemometer or a paddle wheel flow meter, in the area of ​​the water wheel can be fed, - a traction force connection to which a traction force signal measured by a force sensor in the area of ​​the water wheel holding device can be fed.

[0029] Such a setup increases functionality and allows measurements and determination of additional parameters to be carried out using a single, portable and mobile control panel.

[0030] The signal can be supplied to the at least one measuring device via at least one cable that runs from the power generation system to the corresponding connection and from there to the measuring device. Preferably, the at least one measuring device is suitable and configured to determine a value for the respective measured variable based on the transmitted signal. Wired signal transmission is again characterized by low susceptibility to interference and particularly high functional reliability, although wired or wireless signal transmission is of course also an option.

[0031] Examples of such wireless transmission technologies are WLAN (Wireless Local Area Network) and Bluetooth.

[0032] What has been said above regarding hydroelectric power plants with a water wheel applies analogously to wind turbines with wind turbines, in which the flowing medium is formed by air, the water wheel by a wind turbine / rotor and the holding device by a tower, namely the so-called wind tower.

[0033] Furthermore, it is also advantageous here if the at least one display device is suitable and designed to display the value for the respective measured variable determined on the basis of the transmitted signal.

[0034] The electrical loads are preferably formed by electric lights, preferably light bulbs or LEDs, and / or load resistors. Each load can be assigned a separate switch located on the housing, by means of which the respective load can be switched on and off, preferably manually. The use of light bulbs is particularly advantageous here, as they exhibit linear resistance behavior. This means that their resistance increases almost proportionally with the applied voltage. When the voltage across the light bulb is increased, the current flow through the light bulb increases, and it shines brighter. When the voltage is decreased, the current flow decreases, and the light bulb shines dimmer. This linear behavior is ideal for varying the electrical load in the test system in a step-by-step and controlled manner. Light bulbs can also be easily controlled by simply switching them on and off.Each light bulb can be switched on or off independently, making it possible to simulate different load conditions and determine a power curve for different load scenarios. Incandescent bulbs are also often cheaper to purchase than LEDs. However, it should also be noted that incandescent bulbs consume significantly more energy and are less efficient than LEDs. For continuous use, such as in lighting, LEDs are therefore preferred due to their energy efficiency and longer lifespan. However, in a test system where the primary goal is to vary the resistance and control the electrical load, incandescent bulbs are the preferred choice as electrical loads.

[0035] Furthermore, it is preferred if the at least one measuring device is configured to determine the resulting load resistance as a function of the number of consumers connected or disconnected. Here, too, it is advantageous if the at least one display device is suitable and configured to display the current value for the resulting load resistance.

[0036] The at least one measuring device can generally be formed by a single measuring device to which all measured values ​​and / or signals from the power generation plant can be fed. The advantage here is that a single measuring device requires less space than several individual measuring devices. Furthermore, by combining several measured variables in one device, costs for the purchase and maintenance of individual devices can be saved. A single measuring device also means that only one device needs to be operated and calibrated. This simplifies handling and reduces the training required for users. Furthermore, the simultaneous recording of several parameters with one device enables better data synchronization. This is particularly important in applications where the various measured variables are related and need to be analyzed simultaneously.

[0037] Alternatively, it is also possible to provide several separate measuring devices to which the measured values ​​and / or signals from the power generation plant can be fed individually or in groups. The advantage here lies in specialization: Because each measuring device records and processes only one or a few parameters, these devices can be optimized for specific applications. This leads to greater accuracy and precision for the respective measured variable. It also increases redundancy because, in the event of a measuring device failure, the other devices still function and not all measurement data is lost. This increases the reliability and availability of the measurements. Multiple individual measuring devices also offer greater flexibility in arrangement and placement. Furthermore, if new measured variables need to be added, separate measuring devices can be more easily expanded or replaced without having to change the entire system.Finally, multiple measuring devices ensure independent measurements. This can be advantageous, for example, when it comes to avoiding potential interference or interactions between the measured variables.

[0038] Furthermore, the at least one measuring device can comprise an evaluation device or be coupled to an evaluation device in which at least some of the measured values ​​and / or signals from the power generation plant can be processed, wherein the at least one measuring device and / or the at least one evaluation device is connected to the at least one display device for data and / or signal transmission. In particular, the integration of the evaluation device into the at least one measuring device of the control panel offers many advantages in the present case: Firstly, less additional space is required, since no separate evaluation devices are necessary. This leads to a more compact and space-saving overall design. An integrated system with an evaluation device also enables simpler operation, since all functions and information are combined in one device.Users don't have to deal with multiple separate devices, which simplifies handling and operation. An evaluation unit integrated into the measuring device can also process measurement data in real time without the need to transfer data between multiple devices. This shortens response time. The integration of the evaluation unit further enables a closer connection between the measuring sensor and the evaluation unit, leading to greater accuracy and reliability of the measurement results. Potential errors due to signal loss or interference are reduced. When the evaluation unit is integrated into the measuring device, the data can be processed internally before being passed on to other systems. This enables efficient data processing and transmission.The integration of the evaluation unit can also improve the security of sensitive measurement data, as the data passes through fewer interfaces and is therefore less vulnerable to external attacks or data leaks. Finally, the integration of a programmable evaluation unit allows measuring devices to be more flexibly adapted to different applications: For example, functionality can be improved or new features added via software updates without requiring any physical changes to the device.

[0039] Furthermore, it can be provided that the at least one display device is formed by a single display that shows all values ​​to be displayed. A single display requires less space and simplifies device design, which is advantageous in applications with limited space. A single display also enables a central presentation of all measured values. Users can quickly grasp all relevant information at a glance, which improves clarity and usability. Furthermore, the measured values ​​are presented consistently in a single display, which facilitates comparability and interpretation of the data. Finally, the use of a single display reduces hardware and assembly costs compared to several separate displays.

[0040] Alternatively, the display can be made up of several separate displays, each showing one or more values. The advantage here is that multiple separate displays for each parameter provide a clearer presentation without the information becoming overcrowded or confusing. Separate displays also allow the positioning and arrangement of the displays to be adapted to specific needs. For example, certain measured values ​​that are of particular importance can be highlighted on a separate display to draw the user's attention to them.

[0041] The at least one display device can in principle be a separate, external component. However, the at least one display device is preferably arranged on the housing and formed by a display on which the information to be displayed is visually presented. It is preferably provided that each display device is assigned a separate switch arranged on the housing, by means of which the respective display device can be manually switched on and off. By integrating the display devices and, if applicable, switches into the housing of the control panel, the overall design becomes more compact and ergonomic. This facilitates handling and transport of the control panel. The visual representation of the measured values ​​on an integrated display improves clarity. Users can see all relevant information at a glance without having to switch between different devices.Because the indicator(s) are attached to the housing, the measured values ​​are immediately visible without the user having to take additional steps to connect or switch on an external display. The optional use of separate switches for each indicator allows for intuitive and immediate control. Users can easily activate or deactivate the displays to focus on the relevant measured values. This is particularly advantageous for teaching purposes. The integration of the indicator(s) into the housing also improves the overall robustness of the control panel, as there is less susceptibility to damage or malfunction, for example, due to external connections or cables.Finally, the display devices and switches arranged on the control panel housing enable easier operation, as all relevant controls are in close proximity and the user does not have to switch between different devices.

[0042] A particularly compact and easy-to-manufacture housing design is characterized in that the housing has a housing shell located at the top, relative to the vertical axis, which forms a top and visible side and partially encloses a housing interior. A bottom side opposite the top and visible side, relative to the vertical axis, is open at least in some areas to allow access to and intervention in the housing interior. The at least one measuring device and the cabling of the individual electronic components are accommodated in the housing interior. Advantageously, the at least one display device can then be arranged on the top and visible side.

[0043] According to a particularly preferred, compact embodiment, the housing has a substantially rectangular outer geometry in plan view and the housing shell is formed, in a simple and advantageous manner, from a folded plate, for example made of light metal or stainless steel, which, when the control panel is in use, has a sloping wall which is inclined upwards relative to the horizontal in the direction of the user and which forms the top and visible side. In this case, it is then further advantageously possible for the sloping wall to be attached to the use position in the direction away from the user to the rear and optionally orpreferably, with respect to the vertical axis, an upper wall which is angled downwards relative to the inclined wall and is preferably horizontally or angularly oriented, on which upper wall the plurality of electrical consumers are arranged at a distance from one another, preferably equally spaced from one another, in a row above the at least one display device. A number of switches corresponding to the number of consumers can then be arranged on the inclined wall below the at least one display device, wherein it is preferably provided that exactly one switch is assigned to each electrical consumer and / or that the switches on the inclined wall are arranged at the same height as the respectively assigned electrical consumer. Such a structure could of course also be constructed in principle exactly the other way around, i.e. that the electrical consumers face the user.However, this may have the disadvantage that the user has to reach across the electrical consumers to reach the switches, which entails a certain risk of injury from burns, especially when using light bulbs.

[0044] The chamfered shape of the housing makes efficient use of the available space. The chamfered shape can also contribute to better heat dissipation, especially when using incandescent bulbs as electrical devices. Finally, the slanted wall also results in an ergonomic design, as the control panel can be positioned in an ergonomic position for comfortable reading and operation.

[0045] According to a further particularly preferred embodiment, the housing shell is folded in such a way that a rear wall extending downwards in the vertical axis direction adjoins the top wall and that a downwardly extending front wall adjoins the inclined wall, on the side of the inclined wall facing away from the top wall, preferably parallel to the rear wall, wherein the rear wall is suitable and designed to form at least one connection, preferably at least one power connection and / or one speed connection. The downwardly extending rear wall and front wall enable a compact design, whereby the control panel takes up less space. The folded shape with a downwardly extended rear wall and front wall also gives the housing increased stability and robustness.A key advantage of this design is that the rear panel of the housing also serves as a location for connections, such as the power connection and / or the speed connection. This allows for neat cable routing and simplifies connecting the measuring device to external devices.

[0046] At least one carrying and / or holding handle for the control panel can also be arranged on the front panel. Such a carrying and / or holding handle allows for easy handling and transport by a user.

[0047] Alternatively or additionally, a side wall can be arranged on each of the housing shells, transversely opposite to the position of use, with the side walls extending between the front and rear walls. These side walls provide additional stability to the housing and also prevent dirt or moisture from penetrating the interior.

[0048] The housing shell may also have at least one fastening element or at least one fastening counter-element on the underside, which is suitable and designed: - to arrange and fix the control panel on a power generation plant, and / or - to releasably close the control panel on its underside by means of a cover element, preferably by means of a cover plate.

[0049] The at least one fastening element on the underside of the housing shell allows the control panel to be easily and securely attached to a power generation system or another suitable surface. This facilitates transport, assembly, and installation of the control panel. The at least one fastening element also ensures that the control panel is securely attached to the power generation system.

[0050] Covering the control panel with a cover element or cover plate offers protection from external influences such as dust, dirt, moisture, or unwanted contact. It also minimizes the risk of accidents or damage caused by accidental contact or tampering, which is particularly important in industrial environments. The detachably lockable cover design allows easy maintenance and access to the control panel without having to open the entire housing. This allows maintenance work to be carried out quickly and efficiently. The detachably lockable cover design also allows easy access to the interior of the control panel when necessary, for example, when components inside the control panel need to be replaced or adapted to the respective location.

[0051] In addition, the control panel, preferably the housing of the control panel, can have at least one power supply device, for example at least one battery or a rechargeable accumulator, by means of which the current-carrying components of the control panel can be supplied with electrical energy. In this case, it is then further advantageous to provide a main switch on the control panel by means of which the power supply device can be switched on and off. The power supply device integrated into the control panel allows the control panel to be operated independently of external power sources. This is particularly advantageous in situations where there is no direct power supply and, as in the present case, when the control panel is used mobile. The control panel can therefore be easily transported and relocated from one location to another.If the control panel is equipped with an integrated power supply, it can operate continuously even if the external power supply is interrupted, power outages occur, or the minimum voltages required for the measuring and display devices are not met under certain test conditions. Finally, an integrated power supply enables wireless applications, which increases the mobility and user-friendliness of the control panel and reduces the need for external power cables. The ability to switch the power supply on and off using a main switch simplifies operation and saves energy when the control panel is not actively in use.

[0052] The at least one energy supply device can also advantageously be accommodated in a receiving compartment on the top and visible side of the housing shell.

[0053] The integration of the storage compartment on the top and visible side of the housing shell enables a compact design for the entire control panel. Positioning the storage compartment on the visible side of the housing provides easy and clearly visible access to the power supply unit for users. This facilitates battery replacement or maintenance without having to open the device itself.

[0054] A particularly compact and advantageous, space-saving, and easily accessible design provides for the storage compartment to be located in a central area between the display devices arranged to the left and right of the storage compartment. By arranging the storage compartment in a central area between the display devices arranged to the left and right of the storage compartment, the available space is optimally utilized. This results in efficient use of space and an aesthetically pleasing design.

[0055] The control panel according to the invention is preferably designed for extra-low voltages in the range of 6 V to 24 V AC. Versions with higher nominal voltages are generally possible, but stricter safety requirements, such as the Low Voltage Directive, must be observed. Accordingly, the control panel according to the invention can also be preferably designed for low voltages, preferably up to a maximum of 230 V AC. For clarification: In Europe, low voltage is defined, for example, as a voltage range from 50 V AC to 1000 V AC. In the USA, the voltage range for low voltage in the AC system is normally set at 600 V AC or less.

[0056] The object is further achieved by a method in which several electrical consumers can be switched on and off individually or in groups to determine a power curve of the electrical energy supplied to the control panel by the power generation system.

[0057] The resulting advantages are identical to those of the previously described device, so that reference is made to the above explanations in this regard.

[0058] The invention is explained in more detail below with reference to a drawing, merely by way of example.

[0059] They show: Fig. 1 a schematic, perspective view of an experimental setup with a water wheel as an energy generation system, Fig. 2a an exemplary first embodiment of a control panel according to the invention, which is provided with the water wheel according to Fig. 1 is connected for signal and data transmission, Fig.2b the control panel according to Fig. 2a in a rear view, Fig. 2c the control panel according to Fig. 2a and Fig. 2b in a first bottom view from behind and without lower cover plate, Fig. 2d the control panel according to the Fig. 2a and Fig. 2b in a second bottom view from the front and without the lower cover plate, Fig. 2e a schematic diagram for the control panel according to the Fig. 2a to 2d, Fig. 3a is a schematic perspective top view of an exemplary second embodiment of a control panel according to the invention, Fig. 3b a schematic rear view of the control panel according to Fig. 3a, Fig. 3c a bottom view of the Fig. 3a and Fig. 3b shown control panel, without lower cover plate, Fig. 3d a schematic diagram for the control panel according to the Fig. 3a to 2c Fig. 4 a schematic, perspective top view of a further exemplary embodiment of a control panel according to the invention, Fig. 5 is a purely exemplary representation of an exemplary power curve as can be generated with the control panel according to the invention.

[0060] A control panel 1 according to the invention, the exemplary and preferred embodiments of which are described below in connection with the Fig. 2, Fig. 3 and Fig. 4 will be described in more detail, can be used, for example, in conjunction with a water wheel 2 as a hydroelectric power plant or energy generation plant, as is the case for an exemplary test setup in the Fig. 1 is shown.

[0061] For the test, this waterwheel 2 is first placed in a flowing body of water and anchored to the bank (not shown here), for example, via holding cables 3, which form an exemplary holding device for the waterwheel 2. The flow of the flowing water causes the paddle wheel 4 of the waterwheel 2 to rotate. This rotational movement of the paddle wheel 4 is transmitted via a large gear 5 arranged on the paddle wheel 4 to a smaller pinion 6 of a generator 7. The large gear 5 and pinion 6 form an exemplary gear unit or belt drive and are connected to one another by means of a belt 8 for rotational transmission. Even if a generator is mentioned here as an example, it should be noted that the term generator in the context of the present inventive idea is merely an example of any energy converter suitable for use in connection with the present inventive idea.

[0062] The generator 7 is also arranged here on the water wheel 2, which in the example shown here also comprises two floating bodies 9, which are arranged to the left and right of the paddle wheel 4 with respect to the flow direction 10 of the water.

[0063] The electrical energy generated by the generator 7 is then fed via a cable 11 to an energy connection 12 of the Fig. 2a to Fig. 2d according to a first exemplary embodiment. This power connection 12 is particularly well known from the Fig. 2b, Fig. 2c and Fig.2d, wherein the power connector 12 is further connected, for example by means of a cable (not shown), to a measuring device 13, so that the electrical energy generated by the generator 7 is ultimately supplied to the power connector 12 and from there to the measuring device 13. It is understood that the electrical voltage and current generated by the generator 7 must, of course, be compatible with the measuring device 13.

[0064] In a preferred embodiment, the measuring device 13 comprises a voltmeter (for the voltage) and an ammeter (for the current), so that the electrical voltage and the electrical current of the electrical energy generated by the generator 7 can be directly measured and recorded by means of the measuring device 13.

[0065] In the embodiment shown here, the measuring device 13 can also comprise an evaluation device with which the electrical power (P=U * I) of the supplied electrical energy can be determined at the respective measuring time on the basis of the recorded values ​​for the electrical voltage and the electrical current.

[0066] The control panel further comprises a display device 14 with a display 15 (see Fig. 2a) by means of which or on which at least one value of the recorded or determined electrical parameters is displayed, for example the value of the recorded electrical voltage, the recorded electrical current and the determined electrical power.

[0067] The display device 14 together with the display 15 is arranged on a housing 16 of the control panel 1, in the interior 18 of which the measuring device 13 is accommodated, wherein the power connection 12 is also arranged on the housing 16.

[0068] It is understood that the measuring device 13 is of course also connected to the display device 14 for data and / or signal transmission, which is technical standard and is therefore not shown in detail here.

[0069] Specifically, the housing has a housing shell 17 which is located at the top with respect to the vertical axis direction z, which forms an upper and visible side 19 and which partially encloses the housing interior 18 in such a way that a lower side 20 opposite the upper and visible side 19 with respect to the vertical axis direction z is designed to be open at least in some areas for access to and intervention in the housing interior 18 (see Fig. 2c and Fig. 2d).

[0070] As can be seen from the summary of the Fig.2a to 2d, the housing 16 has, in plan view, a substantially rectangular outer geometry with respect to the transverse direction y and the longitudinal direction x, wherein the housing shell 17 is formed by a bevelled plate which, in the use position of the control panel 1 ( Fig. 2a) has a sloping wall 21 inclined upwards relative to the horizontal toward the user or in the vertical axis direction z, which forms the upper and visible side 19. The display device 14 including the display 15 is arranged in this sloping wall 21.

[0071] As is particularly evident from the Fig. 2a and Fig.2b, the inclined wall 21 is adjoined by an upper wall 22 which is angled in the direction away from the user, that is to say in the opposite x-axis direction to the rear and, with respect to the vertical axis direction, downwards relative to the inclined wall 21, and here angularly aligned, for example, on which upper wall 22 a plurality of electrical consumers 23, here for example in the form of light bulbs, are arranged, preferably evenly spaced from one another, in a row above (with respect to the opposite x-axis direction) the display device 14.

[0072] As is particularly evident from the Fig. 2a and Fig.2b, a number of switches 24 corresponding to the number of electrical consumers 23 is arranged on the inclined wall 21, relative to the x-axis direction, below the display device 14, wherein exactly one switch 24 is assigned to each electrical consumer 23 and the switches 24 on the inclined wall 21 are arranged, here by way of example, at the same height as the electrical consumers 23 assigned to them.

[0073] Thus, the individual electrical consumers 23 can be individually switched on or off by means of the switches 24 in the example case shown here, which represents a preferred embodiment, in order, for example, to determine a power curve of the electrical energy supplied to the control panel 1 by the water wheel 2, as will be explained in more detail below.

[0074] As is particularly evident from the Fig.2a, the display device 14 can be assigned an additional, separate on / off switch 25 arranged on the housing 16, here for example on the top and visible side 19, by means of which, for example, only the display device 14 can be manually switched on or off, but it is preferably provided that this on / off switch 25 forms a main switch, by means of which a battery 26 can also be switched on and off at the same time as an exemplary energy supply device for the current-carrying components of the control panel 1. The battery 26 is accommodated here for example in a receiving compartment 27 on the top and visible side 19 of the inclined wall 21 of the housing shell 17.

[0075] The housing shell 17 is further bent in such a way that a rear wall 28 extending downwards in the vertical axis direction z adjoins the upper wall 22 and that a downwardly extending front wall 29 adjoins the inclined wall 21, on the side of the inclined wall 21 facing away from the upper wall 22 in the x-axis direction, which front wall 29 preferably runs parallel to the rear wall 28, as in the exemplary embodiment shown here.

[0076] On the rear wall 28, which is particularly evident from the Fig. 2b, the energy connection 12 is arranged or formed.

[0077] A carrying and / or holding handle 30 is arranged on the front wall, by means of which the control panel 1 can be easily grasped and transported.

[0078] In addition, the housing 16, which is particularly evident from the combination of Fig. 2a and Fig.2b, side walls 31, 32, wherein one of the two side walls 31, 32 is, relative to the position of use of the Fig. 2a, arranged on opposite sides of the housing shell 17 in the transverse direction y. These side walls 31, 32 each extend between the front wall 29 and the rear wall 28 and are firmly connected to the housing shell 17.

[0079] How this is only very schematically shown in the Fig.2a with the cover plate 33 shown in dashed lines, the at least partially open compartment 20 of the housing 16 of the control panel 1 can be releasably closed by means of this cover plate 33. For this purpose, corresponding fastening elements are arranged on the underside 20 of the housing 16, which interact with fastening counter-elements on the cover plate side. In the example shown here, the fastening elements on the underside 20 can be formed by rail-like sliding guide receptacles 34, into which the cover plate 33 can be inserted with its edge regions opposite one another in the transverse axis direction y.The detachable fixing of the cover plate 33 to the underside 20 can be effected, for example, by stops (not shown) or by additional fastening elements (not shown), such as screws, which are screwed from the side of the cover plate 33 into corresponding screw receptacles 35 on the underside 17 of the housing 16.

[0080] The screw receptacles 35 are shown here merely as examples and can, of course, have any other suitable shape. For example, the writing receptacles 35 can also serve a dual function, allowing the control panel (with or without cover plate 33) to be directly mounted at a suitable location on the water wheel 2 (not shown).

[0081] In particular, from the two bottom views 2c and 2d, it is clearly visible how the electrical consumers 23 (here, for example, light bulbs) and the switches 24 assigned to them, with their connection areas, protrude into the housing interior 18. The wiring or cabling required for connecting the individual electronic components (power connection 12, measuring device 13, display device 14, display 15, electrical consumers 23, switch 24, on / off switch 25, battery 26) is carried out as standard and is shown in the Fig. 2c and Fig. 2d is not shown for reasons of clarity, but only by the circuit diagram according to Fig. 2e, in which the interconnection of the most important components is shown as an example.

[0082] In the Fig. 3a to 3c shows a second embodiment of a control panel 1 according to the invention, which is essentially constructed in the same way as that shown in Fig. 2, but differs from the first embodiment of a control panel 1 according to the invention in that a further connection is provided on the housing 16, more precisely on the rear wall 28 of the housing 16, namely a speed connection 38, to which a speed sensor 36 (see Fig. 1) measured speed signal of the water wheel 2 is fed via a cable 37. The speed sensor 36 is in the Fig. 1 is arranged only as an example and schematically on the shaft of the impeller 4.

[0083] In the embodiment shown here, this speed signal is then fed via a cable (not shown) to another measuring device 39, which is also arranged in the housing interior 18. Using this measuring device 39, a speed, for example, is then determined based on the speed signal and displayed via a second display device 14 including a second display 15 on the top and visible side 19 of the housing 16.

[0084] A corresponding circuit diagram is in the Fig. 3d shown.

[0085] From the Fig. 3a and the Fig. 3b it is very clearly evident that in the embodiment shown here, a particularly attractive design and construction of the control panel design is achieved when the receiving compartment 27 for the battery 26 is arranged in a central region between the two display devices 14 arranged to the left and right of it with respect to the transverse direction y.

[0086] Otherwise, the structure is identical to that of the first embodiment of the Fig. 2.

[0087] In the Fig. Finally, Figure 4 shows a third exemplary embodiment of a control panel 1 according to the invention, in which the control panel 1 has, merely by way of example, four additional connections, namely a temperature connection 40, to which a temperature signal measured by a temperature sensor (not shown) is supplied. This temperature connection 40 can in turn be assigned a measuring device (not shown) in the housing interior 18, which detects or determines a corresponding temperature value and displays it via a further display device 41 with a display 42.

[0088] The same applies to a dew point connection 43 together with the associated measuring device (not shown) and display device 44 together with display 45.

[0089] The same applies to a flow velocity connection 46 together with the associated measuring device (not shown) and display device 47 together with display 48.

[0090] The same applies to a traction force connection 49 together with the associated measuring device (not shown) and display device 50 together with display 51.

[0091] The Fig.4 is merely intended to illustrate, by way of example, that further measuring devices can be integrated into the control panel 1 or that further connections for further physical parameters can be arranged on the control panel 1. If necessary, only a single measuring device can be provided, to which all or all of the recorded data and signals are fed. This then results in a compact device. Overall, it should be noted that, as previously explained in the general description, an essential aspect of the present inventive idea is to provide a portable control panel that can be handled and transported by a user easily and without great difficulty. In this respect, according to a particularly preferred embodiment, it is particularly advantageous if the control panel has housing dimensions (without handle and cable glands and as length x width x height oras y * x * z in the examples shown here) that do not exceed 1000x500x350 mm and / or if the control panel does not exceed a weight of approximately 6.0 kg, preferably 5.0 kg. The following exemplary embodiments of control panels according to the invention are particularly preferred: a) Housing dimensions (without handle and cable glands) as length x width x height (or as y * x * z in the examples shown here): - 12V basic version with one measuring device: 300x140x66 mm - 12V version with additional measuring devices: 500x140x66 mm - 230V version with additional measuring devices: 800x300x150 mm b) Guide values ​​for the weight of the control panel for the exemplary versions mentioned under a) above: - 12V basic version with one measuring device: approx. 0.8 kg - 12V version with additional measuring devices: approx. 1.5 kg - 230V version with additional measuring devices: approx. 4.0 kg

[0092] Next, it will now be described by way of example how tests can be carried out with such a control panel 1 according to the invention, and only by way of example in connection with the Fig. 1 schematically shown water wheel 2: First, at the start of the experiment, all electrical consumers 23 are preferably switched off on the control panel 1, for which purpose the switches 24 are switched to their off position.

[0093] The water wheel 2 is then positioned in a flowing water body in the desired manner and the connection between the generator 7 and the control panel 1 is established.

[0094] Then the on / off switch 25 on the control panel 1, which functions as the main switch or battery switch, is switched on.

[0095] As a result, the display device 14 assigned to the measuring device 13 (see for example Fig. 2a) an open circuit voltage of the generator 7 can be read.

[0096] If, as in the example according to the Fig.3, a measuring device 39 with a further second display device 14 and second display 15 as well as a speed sensor 36 is also present, the speed of the water wheel 2 in idle mode can also be determined or displayed.

[0097] After that, a first electrical consumer 23 is connected by switching on the correspondingly assigned switch 24. Now the electrical voltage, the electrical current and the generated power can be shown on the display 14 of the display device 14 assigned to the measuring device 13 (see Fig. 2a) are read and documented. A second electrical load 23 is then connected, and the process is repeated, for example, until all electrical loads have been connected.

[0098] An example of a tabular representation of such a series of experiments is shown below: (0 = idle, all electrical consumers are switched off)

[0099] It is understood that the above measured values ​​are purely exemplary and depend on the specific experimental setup, the type of power generation system, and, of course, the type of electrical loads 23. For example, incandescent bulbs are particularly suitable as electrical loads 23, such as 0.5-watt bulbs or 2-watt bulbs, to name just a few examples. Incandescent bulbs offer the advantage over LED lamps in that they can be used over a wider voltage range and, both through their brightness and through brightness fluctuations, provide a better visual indication of voltage changes and fluctuations during experiments.

[0100] This test procedure can also be repeated with changed parameters, such as a changed gear ratio of the gearbox (large gear 5, pinion 6).

[0101] By systematically determining all influencing factors, the design of the water wheel can be optimized and the maximum achievable performance at a given location of the water wheel and under varying operating conditions can be determined.

[0102] Design factors for the water wheel include the gear ratio of the gearbox, the type of generator used, the ratio of the generator's internal resistance to the load resistance, and so on.

[0103] The operating conditions that can be varied if necessary include the flow rate and flow velocity of the flowing water, the distance of the water wheel from the water bed, the ratio of the width of the water wheel to the width of the water body, to name just a few examples.

[0104] From the data obtained (for example those in the table above), the maximum power of water wheel 2 can then be determined and displayed in a diagram, as shown only as an example in the Fig. 5 is shown.

[0105] In the Fig.Figure 5 shows a power curve with solid lines, while the electrical current and voltage are each shown as dashed lines with different dash sequences. The left y-axis of the diagram shows the current in mA (milliamperes) and the electrical power in mW (milliwatts) as an example, while the right y-axis shows the voltage in V (volts) as an example. The x-axis shows the number of switched-on electrical consumers 23. Here you can see an example maximum power of the water wheel of approx. 5100 mW with around five switched-on electrical consumers 23 and a current of approximately 745 mA at a voltage of approximately 6.8 volts. List of reference symbols 1 control panel 2 water wheel 3 holding ropes 4 paddle wheels 5 large wheel 6 pinions 7 Generator 8 belts 9 floats 10 Flow direction 11 cables 12 Energy exclusion 13 measuring device 14 Display device 15 Display 16 housings 17 Housing shell 18 Housing interior 19 Top and visible side 20 subpage 21 sloping wall 22 upper edge 23 electrical consumers 24 switches 25 on / off switches 26 Battery 27 Compartment 28 Rear wall 29 Front wall 30 Carrying and / or holding handle 31 Side wall 32 side wall 33 Cover plate 34 sliding guide mounts 35 screw receptacles 36 Speed ​​sensor 37 cables 38 Speed ​​exclusion 39 measuring device 40 Temperature exclusion 41 Display device 42 Display 43 Dew point connection 44 Display device 45 Display 46 Flow velocity connection 47 Display device 48 displays 49 Traction connection 50 Display device 51 Display

Claims

[1] Portable control panel for conducting experiments with power generation systems, preferably with water wheels, with a housing (16), wherein at least one measuring device (13) is accommodated in the housing (16), to which electrical energy generated by a power generation plant, preferably by a generator of a power generation plant, most preferably by a generator of a water wheel (2), can be supplied, wherein the at least one measuring device (13) is designed to detect and / or determine at least one value for at least one electrical characteristic of the supplied electrical energy, wherein the control panel (1) is assigned at least one display device (14; 41; 44; 47; 50) which is designed to display at least one value of a detected and / or determined electrical characteristic, wherein the control panel (1) has a plurality of electrical consumers (23) which can be switched on and off individually or in groups, preferably for determining a power curve of the electrical energy supplied to the control panel (1) from the power generation system. [2] Control panel according to claim 1, characterized by that the at least one measuring device (13) is designed to determine a value for the electrical voltage and / or for the electrical current and / or for the electrical power as an electrical characteristic of the supplied electrical energy. [3] Control panel according to claim 2, characterized by that the at least one measuring device (13) is designed to determine a value for at least the electrical voltage and for the electrical current as electrical parameters, preferably to determine a value for at least the electrical voltage, the electrical current and the electrical power of the supplied electrical energy. [4] Control panel according to one of the preceding claims, characterized by that the at least one display device (14; 41; 44; 47; 50) is designed to display each determined value for an electrical characteristic. [5] Control panel according to one of the preceding claims, characterized by that the housing (16) has an energy connection (12) via which the electrical energy generated by the energy generation plant, preferably by a generator of the energy generation plant, can be supplied to the at least one measuring device (13). [6] Control panel according to claim 5, characterized by that the electrical energy can be supplied to the at least one measuring device (13) by means of at least one cable (11) which is led from the energy generation plant, preferably from the generator (7) of the energy generation plant, to the energy connection (12) and from there to the measuring device (13). [7] Control panel according to claim 5 or 6, characterized by , that the energy generation plant is formed by a water wheel (2) which can be driven by water, preferably by a water wheel (2) held in position by means of a holding device, preferably by means of holding cables (3), that the water wheel (2) is assigned a generator (7) which can be driven in rotation by means of the water wheel (2), preferably using a gear and / or a belt drive, to generate electrical energy, that the housing has, in addition to the energy connection (12), at least one further connection (37, 40, 3, 46, 49), via which a signal detected at the water wheel and / or in the region of the water wheel (2) can be fed to the at least one measuring device. [8] Control panel according to claim 7, characterized by that the housing has at least one of the additional connections listed below: - a speed connection (38) to which a speed signal of the water wheel (2) measured by a speed sensor (36) can be fed, - at least one temperature connection (40) to which a temperature signal measured by means of at least one temperature sensor, preferably a temperature signal measured by means of a temperature sensor in the vicinity of or directly on the generator (7) and / or in the vicinity of or directly on the water wheel (2) and / or in the area of ​​the water and / or the environment close to the generator and / or water wheel, can be fed, - a dew point connection (43) to which a dew point signal measured in the area of ​​the water wheel (2) by means of a dew point sensor which measures the relative humidity and the air temperature and calculates the dew point can be fed, - at least one flow velocity connection (46) to which a flow velocity signal measured by a flow velocity sensor, preferably by a vane anemometer or a paddle wheel flow meter, in the region of the water wheel can be fed, - a traction force connection (49) to which a traction force signal measured by a force sensor can be fed in the area of ​​the holding device of the water wheel. [9] Control panel according to claim 7 or 8, characterized by that the signal can be fed to the at least one measuring device by means of at least one cable which is led from the energy generation plant to the corresponding connection and from there to the measuring device, wherein it is preferably provided that the at least one measuring device is suitable and designed to determine a value for the respective measured variable on the basis of the transmitted signal. [10] Control panel according to one of claims 7 to 9, characterized bythat the at least one display device (38, 40, 43, 46, 49) is suitable and designed to display the value for the respective measured variable determined on the basis of the transmitted signal. [11] Control panel according to one of the preceding claims, characterized by that the electrical consumers (23) are formed by electric lights, preferably by light bulbs or LEDs, and / or by load resistors. [12] Control panel according to one of the preceding claims, characterized by that each of the electrical consumers (23) is assigned a separate switch (24) arranged on the housing (16), by means of which the respectively assigned consumer (23) can be switched on and off, preferably manually. [13] Control panel according to one of the preceding claims, characterized bythat the at least one measuring device (13) is designed to determine the resulting load resistance as a function of the number of consumers (23) respectively switched on or off, wherein it is preferably provided that the at least one display device is suitable and designed to display the current value for the resulting load resistance. [14] Control panel according to one of the preceding claims, characterized by that the at least one measuring device is formed by a single measuring device to which all measured values ​​and / or signals of the energy generation plant can be fed, or is formed by several separate measuring devices to which the measured values ​​and / or signals of the energy generation plant can be fed individually or in groups. [15] Control panel according to one of the preceding claims, characterized by , that the at least one measuring device (13; 39) comprises an evaluation device or is coupled to an evaluation device in which at least some of the measured values ​​and / or signals of the energy generation plant can be processed, and that the at least one measuring device (13; 39) and / or the at least one evaluation device is connected to the at least one display device (14) in a data and / or signal-transmitting manner. [16] Control panel according to one of the preceding claims, characterized by that the at least one display device is formed by a single display which displays all values ​​to be displayed or is formed by several separate displays which display individual or several values. [17] Control panel according to one of the preceding claims, characterized bythat the at least one display device (14; 41, 44, 47, 50) is arranged on the housing (16) and is formed by a display (15, 42, 45, 48, 51) on which the information to be displayed is visually represented, wherein it is preferably provided that each display device is assigned a separate switch arranged on the housing (16), by means of which the respective display device can be manually switched on and off. [18] Control panel according to one of the preceding claims, characterized by , that the housing (16) has a housing shell (17) located at the top with respect to the vertical axis direction, which forms a top and visible side (19) and partially encloses a housing interior (18), that a bottom side (20) opposite the top and visible side (19), relative to the vertical axis direction, is at least partially open for access to and intervention in the housing interior (18), that the at least one measuring device (13; 39) and the wiring of the individual electronic components are accommodated in the housing interior (18). [19] Control panel according to claims 17 and 18, characterized by that the at least one display device is arranged on the top and visible side (19). [20] Control panel according to claim 19, characterized by , that the housing (16) has a substantially rectangular outer geometry in plan view, that the housing shell (17) is formed by a bevelled plate which, in a use position of the control panel (1), has a sloping wall (21) inclined upwards towards the user relative to the horizontal, which forms the upper and visible side (19), that in the use position, the inclined wall (21) is adjoined by a top wall (22) which is angled backwards in the direction away from the user and preferably, with respect to the vertical axis direction, downwards relative to the inclined wall (21), preferably horizontally or angularly oriented, on which the plurality of electrical consumers (23) are arranged at a distance from one another, preferably equally spaced from one another, in a row above the at least one display device, that on the inclined wall (21), below the at least one display device, a number of switches (24) corresponding to the number of electrical consumers (23) is arranged, wherein it is preferably provided that exactly one switch (24) is assigned to each electrical consumer (23) and / or that the switches (24) are arranged on the inclined wall (21) at the same height as the respectively assigned electrical consumer (23). [21] Control panel according to claim 20, characterized by , that the housing shell (17) is bent in such a way that a rear wall (28) extending downwards in the vertical axis direction adjoins the upper wall (22) and that a downwardly extending front wall (29) adjoins the inclined wall (21), on the side of the inclined wall (21) facing away from the upper wall (22), preferably parallel to the rear wall (28), that the rear wall (28) is suitable and designed to form at least one connection, preferably at least one energy connection (12) and / or one speed connection (38). [22] Control panel according to claim 21, characterized bythat at least one carrying and / or holding handle (30) for the control panel (1) is arranged on the front wall (29) and / or that a side wall (31, 32) is arranged on opposite sides of the housing shell (17) in the transverse direction, relative to the position of use, the side walls (31, 32) each extending between the front wall (29) and the rear wall (28). [23] Control panel according to one of claims 18 to 22, characterized by that the housing shell (17) has on the underside (20) at least one fastening element or at least one fastening counter-element which is suitable and designed: - to arrange and fix the control panel (1) on a power generation plant, and / or - to releasably close the control panel (1) on its underside (20) by means of a cover element, preferably by means of a cover plate (33). [24] Control panel according to one of the preceding claims, characterized bythat the control panel (1), preferably the housing (16) of the control panel (1), has at least one energy supply device, preferably at least one battery (26) or a rechargeable accumulator, by means of which the current-carrying components of the control panel (1) can be supplied with electrical energy, wherein it is preferably provided that the control panel (1) has a main switch by means of which the energy supply device can be switched on and off. [25] Control panel according to one of claims 18 to 23 and according to claim 24, characterized by that the at least one energy supply device is accommodated in a receiving compartment (27) on the upper and visible side (19) of the housing shell (1). [26] Control panel according to claim 25, characterized by that the receiving compartment (27) is arranged in a central region between display devices arranged to the left and right thereof. [27] Control panel according to one of the preceding claims, characterized by that the control panel (1) is designed for extra-low voltages in the range of 6 V to 24 V or for low voltages, preferably up to a maximum of 230 V. [28] Method for operating a control panel coupled to a power generation plant according to one of the preceding claims, characterized by that the control panel (1) has a plurality of electrical consumers (23) which can be switched on and off individually or in groups in order to determine a power curve of the electrical energy supplied to the control panel (1) from the power generation system.

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