123 results about "Grid code" patented technology

The invention discloses a low-altitude integrated management system based on a grid digital twin model and an intelligent algorithm, and relates to the technical field of low-altitude aircrafts. The method comprises the following steps: multi-source sensing data fusion and grid coding are carried out, and an airspace environment space-time database is constructed; constructing an airspace environment space-time database to carry out three-dimensional subdivision on the airspace; generating a multi-scale grid twinborn body, and associating a corresponding attribute for each level of grid according to a management requirement; generating an airspace risk thermodynamic diagram in the future 5-30 minutes; establishing a grid state change triggering rule; and generating a multi-target optimal path set by taking the grid navigation cost as a weight. According to the invention, by combining the real-time operation data of the low-altitude aircraft, the meteorological environment and other data with the artificial intelligence algorithm and the navigation rule base, the airspace traffic flow is analyzed, the flight plan is optimized, the flight route is intelligently distributed, the automatic route setting of any two points is realized, and the response speed of the low-altitude flight service system and the processing capability of various flight data are improved.

The invention provides an urban low-altitude AI collaborative management and control method and system based on a Beidou grid code and a block chain, and the method comprises the steps: obtaining the information of an unmanned plane, and searching a corresponding evidence storage record in the block chain; the unmanned aerial vehicle information is obtained through a low-altitude intelligent flight control box compatible with various unmanned aerial vehicle protocols; verifying the qualification of the unmanned aerial vehicle through the evidence storage record, and bringing the unmanned aerial vehicle into a distributed collaborative management and control network for unified scheduling when the unmanned aerial vehicle passes the qualification authentication; setting flight authority according to airspace classification of the airspace map and generating a corresponding geofence to limit the flight range of each unmanned aerial vehicle; the airspace map is divided into space-time grids with specified resolution based on Beidou grid codes, state information of each grid unit in the space-time grids is analyzed based on an AI reinforcement learning engine, and flight paths of the unmanned aerial vehicles are dynamically optimized. Flight proxy of the unmanned aerial vehicles is realized through the low-altitude intelligent flight control box, unified scheduling of the multi-source heterogeneous unmanned aerial vehicles is realized, and the airspace use efficiency is improved.

The invention provides a regional target characterization method and device based on a global discrete grid, and relates to the technical field of global discrete grids. The method comprises the following steps: under the condition that a to-be-represented region target is a circular region target, determining three first grid codes used for identifying the circular region target based on the central latitude and longitude of the circular region target, the physical radius of the circular region target and a preset grid level; and under the condition that the to-be-represented region target is a polygonal region target, vertex extraction is performed on a polygonal region of the polygonal region target to obtain a plurality of extracted target vertexes, and second grid codes at the plurality of target vertexes are determined based on latitudes and longitudes of the plurality of target vertexes and a preset grid level. According to the invention, the number of grid codes for identifying the area target can be reduced, the data storage amount and the transmission data amount of the equipment are reduced, and the grid code transmission efficiency of the equipment is improved.

The invention discloses a ship path planning method and system based on Beidou grid codes, and belongs to the technical field of path planning, and the method comprises the steps: obtaining planning data of a to-be-planned area of a ship, carrying out the priority level division of the ship, and combining a prior path, a priority level and a planning index, a grid chart based on Beidou grid codes is generated through a real environment Beidou grid code management module to perform global path planning, collision risk analysis is performed according to real-time sensing data of a navigation positioning system, an AIS, an electric gyrocompass, a log, waves and weather forecast, a path planning effect is evaluated according to task completion efficiency after planning, and the path planning efficiency is improved. According to the method, real-time sensing data such as port information, ship route information, route planning historical data and meteorological information of ships are analyzed and excavated, the route is recommended, the safety, economical efficiency and reliability of the route are improved, and the method is suitable for large-scale popularization and application. And the intelligent level and the operation efficiency of the ship are improved.

The invention discloses an air route intelligent conflict detection method based on a three-dimensional grid, and the method comprises the steps: firstly, carrying out the deep analysis of the spatial domain structure characteristics of a designated region, and constructing a three-dimensional grid model based on the spatial domain structure characteristics; then, on the basis of the three-dimensional grid model, fine arrangement of an airspace and an air route is carried out; and finally, carrying out grid coding on the marked air route, and comprehensively judging the air route conflict in combination with the marked airspace. The method can prevent the unmanned aerial vehicles in various industry fields from conflicting, dangerous approaching and collision events, and is of great significance to guarantee the safe operation of the low-altitude unmanned aerial vehicles.

The invention discloses a low-altitude flight base map construction method for unmanned aerial vehicle path planning, and belongs to the technical field of low-altitude flight base map construction. Screening the building data in the target area, and calculating the actual occupied area of each building after screening; dividing the grid level to which each building belongs according to the actual floor area of each building; performing grid coding on the grid level to which each building belongs; constructing an initial grid; and step-by-step refining is carried out on the initial grid by adopting a method based on building space characteristics to obtain sub-grids, and the building space is represented by utilizing a sub-grid group. According to the method, the low-altitude flight base map of the unmanned aerial vehicle is constructed based on the Beidou grid code, and the method has remarkable advantages in the aspects of data storage and calculation efficiency; through regularized grid division and a refinement strategy, an efficient and lightweight low-altitude flight base map of the unmanned aerial vehicle is constructed, so that the data storage amount of the base map is reduced by more than 95%, and the storage overhead is greatly reduced.

The invention relates to an indoor unmanned aerial vehicle dynamic obstacle avoidance method and device, a medium and a program product. The method comprises the following steps: acquiring an initial planning path; dynamic obstacle detection is carried out to obtain an obstacle detection result, and the obstacle detection result comprises 4D grid codes corresponding to grid volume elements where one or more detected dynamic obstacles are located; segmenting the initial planning path based on the 4D grid codes of the one or more dynamic obstacles, and determining one or more target road sections needing to be replanned in the initial path; and re-planning the target road section by using an improved A star algorithm and a node search strategy, and combining the re-planned road section with other road sections in the initial planning path to obtain a final path planning result. According to the dynamic obstacle avoidance algorithm for the indoor unmanned aerial vehicle, sudden dynamic obstacles in an indoor environment are effectively dealt with, and path adjustment during dynamic obstacle avoidance is realized.

The invention discloses a real-scene three-dimensional system geographic entity space-time coding method, system and device and a medium, belongs to the technical field of three-dimensional scenes, and aims to solve the technical problem of how to quickly and accurately carry out space-time positioning and coding on a geographic entity in a real-scene three-dimensional system and improve data processing efficiency and precision. According to the technical scheme, multi-level network division and unique identifier: multi-level and multi-scale grids on the surface of the earth are divided based on a GeoSOT model, the GB / T 40087-2021 earth space grid coding rule is followed, the grid level is determined by calculating the size of a bounding box of a geographic entity, coordinate binarization left-shift operation is carried out at a coordinate of a center point of the entity, and a unique identifier is obtained; generating a unique grid code containing south and north hemisphere marks and east and west hemisphere marks by combining a Morton code conversion technology and a quaternary conversion technology; bTC Beidou subdivision of time codes is carried out; a space-time embedding model; optimizing spatial data coding in combination with Morton codes and binary tree coding; and sorting the space-time codes through a heap sorting algorithm.

The invention discloses a human and vehicle positioning method and system driven by grid codes, and relates to the technical field of satellite navigation and position service, and the method comprises the steps: obtaining the landform information through a radar and a GIS, carrying out the multi-level space grid division through combining with a Beidou coordinate system, and obtaining a grid set with codes and fuzzy bands; real-time position data of people and vehicles are collected through the Beidou terminal, fuzzy zone intrusion analysis is performed after grids are matched, grid codes with normal / abnormal identifiers are generated, backtracking correction is performed when the grids are abnormal, direct adoption is performed when the grids are normal, and accurate positioning is achieved. According to the invention, the technical problems of poor suitability of traditional grid coding, imperfect boundary processing and dynamic tracking mechanism, easy lattice jumping in positioning and insufficient precision in the process of realizing human-vehicle positioning based on radio wave positioning are solved, and the technical effects of optimizing coding adaptation, boundary and tracking mechanism and realizing accurate and continuous human-vehicle positioning are achieved.

The invention relates to the technical field of data processing, and particularly discloses a city management event processing method and system based on Beidou grid codes. The method comprises the steps of performing grid coding on geographic space data in a city space range based on Beidou grid codes, and generating a basic grid model; when a city management event is reported, obtaining reported event data; processing the event data to determine the event type, geographic position and attribute of the city management event; determining a Beidou grid code associated with the city management event by using the geographic position; judging whether similar events exist in the city management events or not; if the similar events exist, judging whether the events are repeated events or not; if the city management event is not the repeated event, the event type and attribute of the city management event are mapped to a space grid pointed by the Beidou grid code; and packaging each block of data in the basic grid model to provide the data for a subsequent batch processing flow. Based on the invention, data support can be provided for urban management planning.

The invention provides an inspection data acquisition optimization method and system based on a grid code, and electronic equipment, and relates to the technical field of data processing, and the method comprises the steps: traversing parts of a target substation, carrying out the grid code layout, and constructing a digital twin three-dimensional model; obtaining a target inspection point set and a target grid code set in the inspection task, and planning an inspection route; routing inspection is carried out according to the routing inspection route, when any target routing inspection point is reached, positioning is carried out through the grid codes, and acquisition parameters are determined; and adjusting a holder camera according to the collection parameter set, carrying out inspection data collection, carrying out verification by using a digital twin three-dimensional model, and carrying out feedback adjustment based on a verification result. The technical problem that in the prior art, due to inaccurate positioning, the collected data quality is not high, and the inspection efficiency is affected is solved, inspection is conducted through grid code mark positioning and parameter adjustment, it is ensured that the inspection collected data can meet the inspection target, and the inspection efficiency is improved.

An energy conversion arrangement 100 for an electrolysis system 150 comprises an adjustable transformer 101 having a primary-side 102 connectable to an AC power-grid 103 via a point-of-common-coupling, a secondary-side 104, and a tap-changer 105, rectifier transformers 106,107 having primary-sides 108,109 configured to provide secondary-side voltages differing by pre-defined phase-shifts, thyristor rectifier units 114,115,116,117 forming a multipulse rectifier system 118 receiving the secondary-side voltages and providing DC current to electrolyser units 119,120,121,122, and a protection controller unit 133 for connecting / disconnecting the arrangement to / from the grid depending on comparisons of secondary-side voltages with corresponding secondary-side threshold voltages, wherein the multipulse rectifier system comprises synchronization control circuits 123,124,125,126 providing thyristor gate-pulses at firing angles synchronized with the secondary-side voltages, and wherein the corresponding secondary-side threshold voltages are determined by a nominal threshold-voltage in accordance with a grid code at the point-of-common-coupling and physical transformer parameters, adjusted depending on tap-changer position information 129.

The described technology is generally directed towards implementation of an electric vehicle (EV) as an energy generator for a vehicle to grid (V2G) power discharge operation. Energy available at a battery onboard the EV can be discharged to an electrical grid, e.g., via an electric vehicle supply equipment (EVSE) / wallbox. A grid code(s) can be received at the EV. The grid code can be in compliance with EN50549-1 or a local grid code specification. The grid code can include a parameter(s) required to perform the V2G operation, e.g., an “Overvoltage 10 min mean protection, “anti-islanding disengage time”, and the like. The parameter(s) can be added to a distributed energy resource (DER) function bitmap, e.g., to enable an anti-islanding detection method. Communication between the EV and the EVSE can be ISO 15118-2, ISO 15118-20, etc.

The invention relates to a CORS service method for improving positioning performance and safety performance of a Beidou terminal, and belongs to the technical field of GNSS positioning. The Beidou terminal requests the CORS service, and in the cold start state, the CORS service center selects whether to send the ephemeris data according to the user request so as to improve the cold start efficiency of the terminal; after the big dipper terminal achieves rough position calculation, the terminal carries out grid code coding on the rough position, meanwhile, encryption is carried out through an encryption algorithm, and the encrypted rough position is sent to a CORS service center; after receiving the request of the Beidou terminal, the CORS service center decodes the grid code encoding information, searches the corresponding virtual observed quantity according to the approximate position, and broadcasts the virtual observed quantity to the Beidou terminal; and after the Beidou terminal receives the virtual observed quantity, grid point coordinates and observed quantity of the virtual observed quantity are decoded, and high-precision real-time positioning is realized. The method is short in positioning time, saves the communication flow overhead, and reduces the exposure risk of the position of the Beidou terminal.

The invention provides an electrical equipment remote monitoring and fault diagnosis system based on the Internet of Things. According to the method, a multi-source heterogeneous sensor network adopts a self-adaptive acquisition strategy, an edge computing node calculates a signal entropy value in real time, when a chaotic signal is found to be abnormal, the acquisition frequency is automatically improved, Beidou grid code space labeling is started, an attention mechanism of an LSTM-CNN hybrid network is combined, power frequency interference and environmental noise are separated, a standardized vector is output, and the accuracy of the chaotic signal is improved. The problem that a traditional filtering algorithm is prone to losing fault features is solved, a cloud server constructs an equipment part fault graph model through a graph neural network, an improved message passing algorithm is used for analyzing a node coupling relation, and a three-dimensional model of equipment and a signal propagation path inverse calculation method are combined. Accurate positioning of hidden faults such as transformer winding turn-to-turn short circuit is achieved, the real-time state of equipment is dynamically mapped through the digital twin, three-dimensional visual maintenance guidance is generated through the maintenance knowledge graph on the basis of monitoring evidences, and the maintenance decision-making efficiency is remarkably improved.

The invention relates to the technical field of data processing, and particularly discloses a low-altitude track processing method and device based on a three-dimensional grid. The method comprises the following steps: dividing a low-altitude airspace where an aircraft moves into a plurality of three-dimensional grid units, and respectively generating a grid code of each three-dimensional grid unit; obtaining a track data queue, wherein each track point in the queue has time sequence and contains attribute data; the method comprises the following steps: judging whether a track point corresponding to a next adjacent time point is a noisy point or not by utilizing attribute data of track points corresponding to every two adjacent time points, and de-noising a track data queue to obtain a smooth track data queue; filtering the track points in the smooth track data queue at least based on the distance relationship between each track point and the adjacent track point to obtain a thinned track data queue; and processing each track point in the thinned track data queue to determine a three-dimensional grid unit matched with each track point so as to restore the route of the aircraft. According to the scheme, the accuracy of track calculation can be improved.

The invention relates to an indoor unmanned aerial vehicle path planning method and device, a medium and a program product. The method comprises the steps that in response to a path planning instruction of the unmanned aerial vehicle in an indoor environment, 4D grid codes corresponding to the current position and the final position of the unmanned aerial vehicle are acquired, and the 4D grid codes are used for uniquely identifying indoor grid volume elements; based on the position of the unmanned aerial vehicle and the position of the obstacle, the collision risk is calculated and evaluated through a space-time relation, and the space-time relation comprises a space relation and a time relation; and based on the evaluation result, the path is planned by using an improved A star algorithm and a node search strategy, the improved A star algorithm uses a cost function containing flight constraint and distance penalty, and the node search strategy adopts direction heuristic pruning. The invention provides an improved A star algorithm for indoor unmanned aerial vehicle path planning, and ten-millisecond-level path planning under a ten-million-level grid voxel map is realized.

The present invention discloses a system and method for optimizing energy distribution in renewable energy plants. The system (100) comprises a solar power plant or a wind power plant to generate electrical energy. A renewable energy controller (108) monitors real-time energy output and manages energy flow to a grid (112). The renewable energy controller (108) optimizes charging cycles based on forecasts. The renewable energy controller (108) generates dispatch schedules through an intelligent bidding unit (114), considering market prices and grid conditions, while ensuring grid code compliance. A battery digital twin unit (122) is operatively connected to the renewable energy controller (108), to simulate future states of the plant based on historical data, real-time operational data, and weather forecasts, providing inputs for the intelligent bidding unit (114) to optimize energy dispatch and storage.

The invention provides a bridge health monitoring method and system based on Beidou grid codes, and the method comprises the following steps: S1, constructing a bridge spatial index model, generating a multi-level spatial index for a bridge structure according to a Beidou grid coding rule, and building a topological relation table of components and grids; s2, performing multi-modal data feature extraction, performing defect identification on bridge image data through a pre-trained convolutional neural network, and performing abnormal mode detection on sensor time sequence data through a long-short-term memory network; according to the invention, deep coupling of the spatial index and the intelligent algorithm is realized. According to the method, health state evaluation of adjacent areas is mutually referenced, spatial continuity is enhanced, and meanwhile, multi-scale feature aggregation is realized by utilizing a grid hierarchical structure, so that the model can capture relevance of local defects and overall structure response at the same time. In the model training process, space consistency regularization is introduced, it is ensured that evaluation results of adjacent grid units are kept reasonable and continuous, and the misjudgment rate is remarkably reduced.

The invention discloses a distributed control system topological structure optimization method and system oriented to a gas turbine, and belongs to the technical field of gas turbine control. The method comprises the following steps: establishing a double-feature grid coding system fusing space coordinates and an adjacent distance matrix, and updating a shortest path between nodes by using a Floyd algorithm; designing a function-resource allocation scheme by combining engineering constraints such as node working temperature limitation and bus load uniformity; the position of a central intelligent node of the star topology structure is optimized by adopting a particle swarm algorithm, and the local wire harness length is shortened; the node connection sequence of the annular topological structure is optimized through a genetic algorithm, and the redundancy of key nodes is improved; and finally, a hybrid topological structure is formed. The example verifies that the total wire harness length of a certain type of gas turbine control system is reduced by 61.6% compared with that of a traditional centralized architecture, the signal transmission reliability is remarkably improved, the development and maintenance cost is reduced, and the method has important engineering application value.

The invention provides a power grid inspection scheduling method and system based on multi-level subdivision grid driving, and relates to the technical field of inspection scheduling, and the method comprises the steps: carrying out the multi-level space subdivision and space-time coding endowing of a target power grid resource; carrying out table structure design and resource data insertion based on the power grid resource space-time grid coding set and the target power grid resource; querying and determining a target grid coding task set of the to-be-inspected equipment set from the power grid resource subdivision index large table, and performing task scheduling distribution on the target grid coding task set; performing priority ranking on the branch scheduling task sets of the inspection equipment; and performing scheduling planning analysis based on the target branch inspection task sequence set, dynamically generating a target branch inspection path, and performing power grid inspection cooperative scheduling on the unmanned inspection equipment set through the target branch inspection path. According to the invention, the technical effects of improving the space organization capability of the inspection task, optimizing the equipment scheduling strategy and enhancing the resource collaboration efficiency can be achieved.

The invention discloses a ground feature Beidou grid data generation method. The method comprises the following steps: determining a ground feature polygonal patch set under a projection coordinate system according to a ground feature three-dimensional model; constructing an axial bounding box according to the polygonal patch set; determining an effective grid unit model of the ground object three-dimensional model according to the axial bounding box and the hierarchical precision of the Beidou grid; and calculating a Beidou grid code according to the central point geographic coordinate of each grid unit of the effective grid unit model, and adding Beidou grid attribute information corresponding to the Beidou grid code to the attribute of the corresponding grid unit to obtain ground feature Beidou grid data. According to the method, the spatial reference frame consistent with the Beidou grid system can be established for the three-dimensional universal model in any format, and the calculation efficiency is improved. The invention further discloses a device for implementing the method, electronic equipment and a storage medium.

Operation of an electric vehicle (EV) is monitored and controlled to enable operation in a vehicle to grid (V2G) configuration. During bidirectional power transfer, energy stored in batteries onboard the electric vehicle can be transferred to the grid. During a period of high energy input into the grid, e.g., energy sourced from wind turbines / solar, the energy can be stored in the onboard batteries. During low energy input, the energy stored in the batteries can be transferred to the grid. V2G operation is conducted in accordance with a grid code(s) implemented at the grid. As the EV operates from one location to another, a grid code pertaining to a current location of a V2G operation by the EV can be identified and implemented on the EV. In the event of the grid goes into an emergency condition, the EV can assist in returning the grid to a normal operating condition.

The invention provides a three-dimensional geographic entity space-time identification coding method based on a Beidou grid code, and belongs to the field of live-action three-dimensional, and the method employs a classification identification + space identification + time identification structure, and rapidly calculates an outsourcing 3D convex hull of a three-dimensional geographic entity through KD tree pruning and principal component analysis. The method comprises the following steps of: determining a subdivision hierarchy of a maximum inner packet grid by using neighborhood seed growth, calculating an entity space identifier which takes a Beidou three-dimensional grid position code as description by using a six-point method, further calculating an entity time identifier in a form of geographic entity ID + timestamp, realizing accurate identification of a geographic entity three-dimensional space position and time information, and realizing accurate identification of the geographic entity three-dimensional space position and time information. The problems that traditional geographic entity coding is insufficient in identification precision in three-dimensional space and time dimension, data integration is difficult and the like are solved, and the method has extremely high application value in the fields of live-action three dimensions, smart cities, low-altitude economy and the like.

The invention provides a business processing method of a smart factory platform based on a Beidou grid code, and the method comprises the steps: carrying out the multi-stage grid subdivision of a factory physical space through the Beidou grid code, and generating a unique grid code; the grid coding adopts an integer format to represent position information; equipment sensor data, personnel positioning data and business logic data are bound with the grid codes, and a space-time joint index table is constructed; performing real-time deviation correction on the positioning data through a grid neighborhood topological relation and personnel moving speed constraint to generate a high-precision positioning track; and mapping the service logic to the grid codes through a rule engine, and triggering automatic operation according to grid attributes. Traditional floating point latitude and longitude coordinates are replaced by integer coding, data calculation efficiency is optimized through bit operation, cross-level business association and fast path planning are supported, and business response efficiency is improved.

The invention discloses a building grid enterprise migration clue generation method and system, a storage medium and a program. The method comprises the following steps: S1, establishing a building three-dimensional grid code; s2, accessing an enterprise entity, an address text and a heterogeneous presence event stream; s3, gate region co-occurrence anchor point event pairs are constructed only based on the anchor point qualification set, multi-source event flow clock skew and drift rate are estimated and corrected in a segmented mode, drift continuity constraint is applied, and a unified time axis is formed; s4, segmenting a resident section on a unified time axis, generating a migration candidate, and executing passing feasibility verification and grid fingerprint template consistency verification on the migration candidate; and S5, constructing a minimum evidence matrix and performing decision according to a one-ticket override mode, taking gate area coverage consistency as a necessary evidence source, performing override when conflicts occur, triggering a mending closed loop when the evidence is in a gap, and then outputting a migration clue or a suspected clue and a recheckable evidence packet. According to the method, pseudo migration clues caused by wireless coverage overlapping and cross-source clock skew can be inhibited, and clue reliability and auditing performance are improved.

The invention discloses a three-dimensional grid coding and decoding method and device, and relates to the technical field of three-dimensional grid coding and decoding, and the method comprises the steps: dividing a three-dimensional grid into a basic grid intra-frame piece and a basic grid inter-frame piece, carrying out the coding, obtaining a basic grid intra-frame piece code stream and a basic grid inter-frame piece code stream, and carrying out the coding of the basic grid intra-frame piece and the basic grid inter-frame piece; obtaining a reconstructed basic grid intra-frame slice and a reconstructed basic grid inter-frame slice at the same time; combining the reconstructed basic grid intra-frame slices and the reconstructed basic grid inter-frame slices to obtain a reconstructed basic grid; and subdividing the reconstructed basic grid to obtain the displacement of a subdivided grid, and encoding the displacement of the subdivided grid to obtain a displacement code stream. The coding efficiency can be greatly improved.

The described technology is generally directed towards implementation of an electric vehicle (EV) as an energy generator for a vehicle to grid (V2G) power discharge operation. Energy available at a battery onboard the EV can be discharged to an electrical grid operated by a distribution system operator (DSO), e.g., via an electric vehicle supply equipment (EVSE) / wallbox. Location codes can be utilized to ensure the EV is able to perform the V2G operation where the EVSE is located. The location codes can be Subdivision codes complying with ISO 3166-2. Communication between the EV and the EVSE can comply with ISO 15118-2, and include exchange of ServiceDetailRequest messages and ServiceDetailResponse messages.

The invention relates to the technical field of building information modeling, in particular to a BIM model rendering method and device, a medium and equipment, and the method comprises the steps: screening out a reference grid hierarchy set and a middle grid hierarchy set through the matching degree between a building component and each initial grid hierarchy and preset grid data; according to the method, the first tile set and the second tile set are constructed, the building components are divided and rendered from a relative macroscopic angle through the first tiles, and finer detail parts of the building components are presented through the second tiles, so that reasonable division and rendering of the building components from different levels are facilitated, diversified display requirements are met, and the display efficiency is improved. According to the method, the plurality of grid codes are selected, the target grid code is screened out from the plurality of grid codes, then the corresponding grid triangular surface of the building component under each first tile is constructed and integrated, the triangular surface data used for rendering the outer surface of the building component is accurately determined while the rendering data volume is optimized, and the rendering efficiency is greatly improved on the basis of ensuring the rendering effect.

An energy conversion device 100 for an electrolysis system (150) comprises: an adjustable transformer (101) having a primary side (102) connectable to an AC grid (103) via a point of common coupling, a secondary side (104) and a tap switch (105); a rectifier transformer (106, 107) having a primary side (108, 109) configured to provide a secondary side voltage differing by a predetermined phase shift; a thyristor rectifier unit (114, 115, 116, 117) forming a multi-pulse rectifier system (118) that receives the secondary side voltage and provides a DC current to the electrolyser unit (119, 120, 121, 122); and a protection controller unit 133 for connecting / disconnecting the device to / from the power grid as a function of a comparison of the secondary-side voltage to a corresponding secondary-side threshold voltage, where the multi-pulse rectifier system comprises a synchronization control circuit (123, 124, 125, 126) providing thyristor gate pulses at an emission angle synchronized with the secondary-side voltage, and a protection controller unit 133 for connecting / disconnecting the device to / from the power grid as a function of a comparison of the secondary-side voltage to a corresponding secondary-side threshold voltage. And wherein the respective secondary-side threshold voltage is determined from a nominal threshold voltage specified by a grid guideline at the point of common coupling and a physical transformer parameter adjusted according to tap switch position information (129).