145 results about "Low voltage grid" patented technology

The invention discloses a line loss treatment method based on low-voltage power grid multi-source data fusion, and belongs to the technical field of information, and the method comprises the steps: reconstructing a power supply path based on a power grid topological structure and a changed power access point; extracting reverse power flow characteristics of the frequency points for correcting a node impedance matrix of the current power supply path to obtain a power supply access point impedance parameter set; updating a power transmission path through the reverse power flow characteristic to obtain a power distribution characteristic; and a power grid topological structure, a current power supply path, a power supply access point impedance parameter set and power distribution characteristics are fused to construct a line loss distribution prediction model and identify a line loss abnormal region, and the line loss abnormal region is treated. Through implementation of the method and the device, the problem that the line loss treatment effect is poor due to the fact that the influence of factors such as transformer area topological structure change, power access point change and load fluctuation on the line loss is not considered in the prior art, and the predicted line loss distribution has a large error compared with the actual situation can be solved.

The invention discloses a low-voltage power grid residual current monitoring and early warning system and method based on an intelligent network, and belongs to the field of safety monitoring. The method comprises the steps that a residual current sensor is installed to monitor current change, and current fluctuation is intelligently analyzed; establishing a machine learning model based on historical data, and training normal fluctuation characteristics of the residual current; the sudden change of the current is judged through a time sequence anomaly detection algorithm, and a new data optimization model is regularly utilized; the residual current fluctuation is graded, when the current deviation reaches a threshold value, the system automatically sends a notification of the corresponding grade according to the early warning grade, the position of a fault node is automatically judged through the geographic position of a sensor and a network topology structure, and a fault section is judged in combination with power grid topology data; after early warning is triggered, the system performs statistical analysis on abnormal current data, and the system automatically optimizes the acquisition frequency and the early warning threshold according to the real-time current data and the fault probability. According to the invention, through monitoring and intelligent early warning, the safety and response speed of the power grid are significantly improved.

A system suppresses extreme voltage surges induced on electric power lines due to transient electromagnetic energy disturbance from detonation of a nuclear weapon at high altitude generating an electromagnetic pulse (EMP) comprising E1, E2, and E3 pulses, geomagnetic disturbance, and intentional electromagnetic interference. Low voltage (LV) surge protection (SP) assemblies mounted at medium voltage (MV) inputs and LV outputs of the stacked converter cells of a solid-state transformer (SST) form SP of MV and LV electrical power grids interfaced by the SST. The SP assemblies utilize LV components to provide MV grid protection, shunting overcurrent to ground without interfering with the SST MV / LV grid segments isolation. The SP components are selected and coordinated to achieve predefined response at protection threshold voltage levels with current capacity mitigating complex components of HEMP. The hybrid SP communicates with SST control to react to a prolonged overvoltage / overcurrent fault condition.

The invention provides a communication method and system based on HPLC and HRF dual-mode fusion, belongs to the field of power line carrier communication, and solves the problem that the communication performance is still insufficient in a three-phase four-wire system low-voltage power grid environment. The method comprises the following steps: in a high-speed power line carrier communication channel of a three-phase four-wire system power grid, dynamically learning an electric phase of each terminal through a carrier coupling success rate, constructing an electric phase identification model, and recording communication characteristics of a phase line to which each terminal belongs; identifying link isolation states among different phase lines by combining an electric phase communication map generated on the concentrator side based on the phase information of each terminal; and under the condition of determining that a cross-phase communication bottleneck exists based on the link isolation state, executing a preset collaborative packet sending optimization strategy, and in the optimization process, establishing an out-phase relay path through a high-speed wireless communication channel.

The invention provides a power grid day-ahead regulation and control method and device based on distributed photovoltaic virtual cluster dynamic division, and the method comprises the steps: obtaining a distributed photovoltaic virtual cluster through the dynamic division of an improved community theory of weight clustering based on distributed photovoltaic characteristic data and a regulation and control target; based on a pre-trained distributed photovoltaic prediction model, predicting future output data of each distributed photovoltaic according to historical output data, historical meteorological data and meteorological prediction data of the distributed photovoltaic in the distributed photovoltaic virtual cluster; and regulating and controlling the distributed photovoltaic virtual cluster according to the regulation and control target and the corresponding regulation and control target function based on the future output data of each distributed photovoltaic in the distributed photovoltaic virtual cluster. According to the method, distributed photovoltaic can be effectively classified, so that the regulation and control capability and the stable operation capability of a low-voltage power grid are improved; meanwhile, the economical efficiency, the safety and the reliability of low-voltage power grid operation are improved.

The invention discloses a low-voltage power grid voltage fluctuation control method and system based on artificial intelligence. The method comprises the steps of obtaining a multi-source data set from a power grid; if the line loss estimation deviation in the multi-source data set exceeds a preset deviation range, iteratively optimizing a preset initial resource allocation scheme according to a multi-objective optimization algorithm to obtain a computing resource allocation scheme; obtaining final line loss distribution characteristics through task grading and parallel decoupling calculation according to a calculation resource allocation scheme; and generating a generator set output adjustment scheme according to the final line loss distribution characteristics, and regulating and controlling the power grid. According to the artificial intelligence-based low-voltage power grid voltage fluctuation control method and system provided by the invention, power grid data are integrated, line loss distribution is analyzed, and a voltage fluctuation trend is predicted, so that the output of a generator set is regulated and controlled, and voltage stabilization and line loss control are realized; therefore, the problem that effective control and line loss treatment are difficult to carry out on the power grid voltage fluctuation can be solved.

The invention discloses a middle and low voltage power grid fault positioning system and method based on grid topology, and relates to the technical field of power grid fault positioning, and the method comprises the steps: obtaining historical electrical parameter records of equipment nodes in grid topology modeling, evaluating the node abnormality degree of the equipment nodes, and obtaining abnormal equipment nodes; obtaining coordinates of the abnormal equipment nodes in the grid topology modeling, traversing the equipment nodes in the grid topology modeling, generating candidate abnormal regions, and evaluating region anomalies of the candidate abnormal regions to obtain a target abnormal region; acquiring traveling wave signal data in the target abnormal area, and positioning a fault in the target abnormal area based on the traveling wave signal data to obtain fault position data of the target abnormal area; and acquiring fault position data in the power grid in the current period, planning a fault maintenance path in the power grid, and dispatching maintenance personnel to sequentially maintain the faults in the power grid according to the fault maintenance path.

The invention discloses a protection method for a low-voltage power grid, the low-voltage power grid comprises a transformer area intelligent terminal and a plurality of intelligent switches, the transformer area intelligent terminal and the plurality of intelligent switches are connected through power lines, and the method comprises the following steps: establishing a longitudinal communication network between the transformer area intelligent terminal and the plurality of intelligent switches; determining a branch level of the low-voltage power grid according to the voltage, the current, the power, the electric energy and the alternating-current zero crossing point; drawing an electrical topological relation of the plurality of intelligent switches based on the branch hierarchy; establishing a transverse communication network of the plurality of intelligent switches based on the electrical topological relation; and when the power line has a short circuit or a grounding fault, the fault area is cut off through the corresponding intelligent switch, the fault information is broadcasted and the fault area is positioned through the transverse communication network, and the fault information is reported to the station area intelligent terminal through the longitudinal communication network. According to the protection method, the fault area can be accurately positioned, so that the emergency situation of the low-voltage power grid can be efficiently and quickly handled in real time.

The invention discloses a voltage balancing device of a 10KV three-element combined mutual inductor and a using method of the voltage balancing device, and relates to the technical field of mutual inductors. The voltage balancing device of the 10KV three-element combined mutual inductor comprises a first mutual inductor shell, the voltage balancing device comprises a second mutual inductor shell, a voltage mutual inductor is installed in the first mutual inductor shell, and a current mutual inductor is installed in the second mutual inductor shell. The front end of the first mutual inductor shell is fixedly connected with a mutual inductor junction box, a voltage stabilizer is installed outside the first mutual inductor shell, and by means of Y-shaped connection of a secondary winding of the voltage mutual inductor and use of a circuit breaker and the voltage stabilizer, voltage balance of the voltage mutual inductor is facilitated; the Y-shaped connection can guarantee three-phase balance while providing a stable power supply, has an effect of absorbing harmonic waves, improves the power supply efficiency, avoids equipment damage caused by overload, and guarantees good operation of low-voltage power grid protection.

The embodiment of the invention provides a fault recording data processing method and device, equipment and a storage medium, and relates to the technical field of electric power. The method comprises the steps of obtaining a wave recording file of a photovoltaic grid-connected point in a preset time period, carrying out data sampling on the wave recording file according to a time period of sampling frequency determined according to the time period of sampling time so as to obtain fault wave recording data, and finally carrying out fault analysis on a power grid fault according to the fault wave recording data. Wherein the time period comprises a fault occurrence stage, a fault development stage or a fault change stage. According to the method, on the premise of ensuring that key fault information is obtained, the data storage amount is effectively reduced, the balance of high sampling rate and low occupied memory of the fault recording data is realized, then a reliable basis is provided for power grid fault analysis, the comprehensiveness and accuracy of power grid fault analysis are greatly improved, and the method is suitable for popularization and application. And safe and stable operation of the low-voltage power grid after distributed photovoltaic large-scale access is ensured.

The invention discloses an electric shock protection method for a low-voltage power distribution network, and belongs to the field of electric shock protection of low-voltage power distribution networks. Decomposing the residual current signal into IMF components based on VMD; total energy of IMF components is calculated, and energy values of different frequency bands are used as features; inputting the features into a pre-constructed electric leakage fault type identification model, wherein the electric leakage fault type identification model identifies different electric leakage scenes; and based on the electric leakage scene identification result, executing a protection criterion. According to the method, the electric shock current component is accurately extracted from the complex residual current waveform, the degree of an electric shock accident is reflected, after the electric shock current is obtained, different action measures are executed according to the effective value of the current, and RCD protection misoperation caused by interference factors and refusal action in the electric shock state are effectively prevented.

The invention provides a dual-mode-based low-voltage power grid state information management method and a dual-mode-based low-voltage power grid state information management system, belongs to the field of power line carrier communication, and solves the problem that the bit error rate is still high in some scenes. The method comprises the following steps: acquiring control harmonic characteristic parameters of grid-connected inverter equipment in a transformer area and physical layer state parameters of a high-speed power line carrier communication channel in the high-speed power line carrier communication channel; on a concentrator side or an edge node side, constructing an error rate risk assessment model based on the control harmonic characteristic parameters and the physical layer state parameters so as to identify a link risk state in which feedforward gain limitation and spectrum migration need to be executed; the method comprises the following steps: under the condition of determining that a control harmonic wave causes selective desensitization of a high-speed power line carrier communication front end based on a link risk state, applying feed-forward gain limitation to a high-speed power line carrier communication channel, and migrating a high-risk subcarrier to a low-risk frequency band; and a bypass relay path is established through the high-speed wireless radio frequency communication channel so as to transmit key data in the execution period.

The invention relates to an unlocking control system and method and a vehicle, and the unlocking control system comprises an external electricity supplementing interface which is used for connecting an external emergency power supply in a whole vehicle power shortage state; the power management module is used for being connected with an external emergency power supply and collecting and detecting the voltage of the external emergency power supply. If the detected voltage is matched with the low-voltage power grid voltage of the whole vehicle, the power management module controls the second-stage cut-off protection unit to be switched on, so that the low-voltage storage battery is switched on with an external emergency power supply for charging operation; the low-voltage storage battery is used for supplying power to a low-voltage power grid And the door module is used for driving a door lock to complete unlocking if a vehicle door unlocking signal is received and a user passes identity information authentication after the door module is powered by the low-voltage storage battery. The vehicle door can be opened on the premise of ensuring the reliability of vehicle power-on operation and the anti-theft safety, and the design which is low in cost and compatible with science and technology is achieved.

The invention belongs to the technical field of low-voltage power grid emergency repair, and proposes a low-voltage distribution network fault emergency repair wire-laying device and method. The invention has multiple wire-laying mechanisms on a central axis, and the wire-laying mechanisms include a limit assembly arranged on the central axis. After the multiple limit assemblies are arranged and the elastic rod is connected to the isolation rod, the wire coil can be separated independently, thereby avoiding the problem that multiple wires are embedded together and affect the wire-laying effect; at the same time, when laying out the wire, the adjustment assembly rotates relative to the limit assembly to put the wire on the wire coil; when winding the wire, the central axis rotates to drive the entire limit assembly to rotate, and the wire is wound around the isolation rod and the elastic rod, thereby avoiding the contact between the wire and the original wire of the wire coil when winding the wire, avoiding the influence on the wire, making it easier to lay out the wire next time, and at the same time avoiding the pollution of the original wire of the wire coil by mud on the wire when winding the wire, thereby ensuring the cleanliness of the original wire of the wire coil.

The invention relates to the technical field of transformers, in particular to a signal transformer for multi-path signal coupling of a low-voltage power grid, the signal transformer comprises a magnetic core, an inlet wire winding and an outlet wire winding, efficient electromagnetic coupling and isolation of multi-path signals are achieved through the magnetic core, and a main control chip can send control signals to equipment through a driver and a coupling winding. And receiving an equipment feedback signal. The system can extract characteristics of a control signal and a feedback signal in real time, dynamically calculate a comprehensive crosstalk index, and adaptively adjust parameters of a receiving filter and a driver according to the comprehensive crosstalk index, so that signal crosstalk caused by physical coupling among multiple channels is effectively inhibited. According to the scheme, the structure is simplified, the system cost is reduced, the communication quality and the anti-interference capability of multiple paths of signals in a low-voltage power grid are remarkably improved, and the system is suitable for multiple occasions such as high-reliability power line communication.

The invention discloses a sensing signal transmitting system for liquid caustic soda production, which comprises the steps of acquiring and processing a sensing signal at a production equipment end, coupling the sensing signal with a low-voltage power grid, transmitting the signal by using a high-frequency low-frequency band narrowband communication technology, receiving and processing the sensing signal at a central control end, and inputting the sensing signal into a PC (Personal Computer), various control signals are generated in combination with production process software, and the control signals are coupled and then transmitted to a production equipment end to be processed and executed. A low-voltage power grid high-frequency low-frequency band narrow-band communication technology is adopted, the defects that wiring transmission of sensing and control signals of a traditional liquid caustic soda production line is high and existing carrier communication has high requirements for frequency, frequency band and bandwidth are overcome, and on the basis that stable transmission of the sensing and control signals and normal operation of equipment are met, the communication efficiency is improved. The technical difficulty and cost of the system are reduced, and the problems of technical upgrading and reconstruction of the existing production line and sensing and control signal transmission of a newly-built production line are effectively solved.

The utility model discloses a pest control device for forestry seedling raising, which belongs to the field of pest control and comprises a liquid storage barrel, a stand column is fixedly connected to the middle of the upper surface of the liquid storage barrel, a spraying deinsectization mechanism is arranged on the outer surface of the stand column, and a night deinsectization mechanism is arranged at the upper end of the stand column. According to the device, the pump is started, pesticide liquid used for killing pests in the liquid storage barrel is pumped out through the main pipe and the branch pipe and sprayed out through the atomization spray head, forest seedlings in the daytime are irrigated, pests on the forest seedlings are killed, the trap lamp is turned on at night to attract the pests, and when the pests fly to the trap lamp, the pests are electrically killed through the low-voltage power grid. Physical prevention and control and chemical prevention and control are combined together to achieve a better prevention and control effect, and the situation that the prevention and control effect is reduced due to the fact that pesticide prevention and control are singly used is avoided.

The invention relates to the technical field of power systems, in particular to a low-voltage user power failure monitoring system based on the Internet of Things, which comprises a central processing unit module, a communication module, a storage module, a supervision module, an alarm module, a power failure monitoring module and a treatment module. Through the arrangement of structures such as the supervision module, the power failure monitoring module and the management module, the operation conditions of an ammeter and a transformer of a user can be monitored factually, the real-time discovery of a low-voltage power grid fault is realized, and a power failure global map in a specified power distribution area is displayed so as to monitor a power failure event; and displaying the monitoring result of the processing process of the power failure event according to the type of the power failure event, so that a decision maker can globally know the power failure event in the power distribution area and the processing process condition of all the power failure events through the power distribution network power failure monitoring system provided by the embodiment of the invention. The power failure event can be monitored and processed in time, and the processing efficiency of the power failure event is improved.

The invention discloses an electric energy meter-oriented low-voltage power grid harmonic recognition algorithm optimization method, which relates to the technical field of power systems, and comprises the following steps of: respectively acquiring electric signals at a first sampling frequency and a second sampling frequency, constructing a high-frequency harmonic existence frequency list based on the electric signals acquired at the second sampling frequency, and constructing a high-frequency harmonic recognition algorithm based on a Nyquist sampling theorem. Whether a position locking instruction is triggered or not is judged, after the position locking instruction is received, a high-frequency harmonic existence frequency list is traversed, turn-back frequencies are calculated, energy accumulation is carried out on the same turn-back frequencies, an aliasing high-risk interval is constructed, high-order wavelet packet decomposition is carried out on the aliasing high-risk interval, and a candidate aliasing component sequence is obtained; and for each high-frequency harmonic frequency, calculating total turn-back pollution contribution energy at each turn-back position in the sampling channel under the condition of the first sampling frequency, and performing iterative correction on the candidate aliasing component sequence based on the total turn-back pollution contribution energy.

The invention discloses a user terminal-oriented low-voltage power grid fault early warning method and system, and belongs to the technical field of fault early warning. In the operation process of the low-voltage power grid, collecting environment data around the user terminal in real time; collecting real-time operation data of the power grid equipment; fusing the environment data and the real-time operation data of the power grid equipment; based on the fused data, identifying a potential mode of a power grid fault, and predicting fault occurrence time; and the fault early warning information and the adjustment strategy are fed back to the user terminal in real time, the load change condition after the user receives the feedback is monitored in real time, and dynamic adjustment is carried out. According to the invention, by dynamically adjusting the load and equipment use, the power grid can be further ensured to respond quickly when facing a fault risk, and the possibility of fault occurrence is reduced, so that the operation efficiency, stability and reliability of the power grid are effectively improved.

The invention discloses a low-voltage intelligent management and control device, particularly relates to the technical field of low-voltage power system management, and realizes accurate expression of a low-voltage power system structure through multi-level power network model construction and topology updating. Identifying a potential propagation path through fault feature vector extraction and graph neural network training; the risk probability of each path is predicted through the long-short-term memory network, and the fault risk prediction index is formed by combining the operation risk index and the electrical risk index, so that the problem that the fault is difficult to locate and block in time in the traditional low-voltage management and control is solved; performing priority protection on a key path through dynamic threshold regulation and control; the method can achieve the advanced prediction and active prevention and control of potential faults in a low-voltage power grid, reduces the chain loss caused by fault spreading, and improves the operation reliability and power supply safety.

The invention provides a prediction method, device and equipment for a power failure range of a low-voltage power grid, a medium and a product. The method comprises the following steps: acquiring a low-voltage power grid operation variable after disturbance is added into a low-voltage power grid and a variable reference value during normal operation of the low-voltage power grid; determining a time sequence data set of each component in the low-voltage power grid operation variables according to the low-voltage power grid operation variables; according to the time sequence data set of each component and the prediction register, performing prediction processing on the low-voltage power grid operation variables to obtain a predicted operation variable sequence; determining a component power failure prediction index corresponding to each component according to the prediction operation variable sequence; according to the variable reference value during normal operation, the component power failure prediction index corresponding to each component is verified to obtain the low-voltage power failure prediction index, and the accuracy of predicting the power failure range of the low-voltage power grid is improved.

The application discloses a kind of dynamic response 5G communication differential protection data transmission method, so that the differential protection service based on 5G communication is widely applied in low-voltage distribution network field, promote the development of new technology of power grid relay protection, solve the protection terminal of traditional low-voltage power grid not dependent on channel cannot give consideration to speed and selectivity requirement, by using advanced 5G communication technology, with the high bandwidth of 5G communication network, low latency and high reliability wireless communication environment, realize the large-scale application of longitudinal differential protection in closed-loop operation low-voltage power grid, improve the protection level of power grid.The application applies dynamic response transmission mode in the communication process of distribution network transmission line differential protection based on 5G communication, meets the rapidity requirement of relay protection, reduces 5G communication transmission flow, saves communication resources and reduces communication cost.

The invention discloses a high-voltage multi-section constant-current LED emergency lighting driving system and a control method. Relates to the technical field of power supply. Comprising LED lamp beads, an alternating current power supply part, an EPS power supply part and a driving IC. The alternating current power supply part and the EPS power supply part supply power to the same LED lamp bead through the same driving IC; according to the scheme, a traditional circuit structure is improved, the alternating current power supply part and the EPS power supply part supply power to the same LED lamp bead through the same driving IC, and the purposes of reducing cost and simplifying a circuit are achieved; wherein the alternating current power supply part accords with high-low voltage power grid input and meets sub-harmonic requirements; meanwhile, the EPS power supply part outputs constant voltage, the output power of the voltage changes along with the combination of the LED lamp beads, linear driving is shared to realize single-section constant current, and the purposes of reducing the cost and simplifying the circuit are realized on the premise of flexibly realizing EPS illumination application of different powers.

The application discloses a line loss treatment method based on low-voltage power grid multi-source data fusion, and belongs to the information technology field.The method is as follows: based on the power grid topological structure and the changed power supply access point, the power supply path is reconstructed; the reverse power flow characteristics of the frequency point are extracted to correct the node impedance matrix of the current power supply path, and the power supply access point impedance parameter set is obtained; the power transmission path is updated through the reverse power flow characteristics, and the power distribution characteristics are obtained; the line loss distribution prediction model is constructed by fusing the power grid topological structure, the current power supply path, the power supply access point impedance parameter set and the power distribution characteristics, and the line loss abnormal area is identified and treated. Through the implementation of the application, the influence of the factors such as the change of the transformer area topological structure, the change of the power supply access point and the load fluctuation on the line loss is not considered in the prior art, so that the predicted line loss distribution has a large error compared with the actual situation, and the line loss treatment effect is poor.

The utility model relates to the field of farm deinsectization, in particular to a hanging type deinsectization device for a cow breeding room, which comprises a cylinder, a top cover is fixedly mounted at the top of the cylinder, a deinsectization mechanism is arranged on the inner wall of the cylinder, the deinsectization mechanism comprises a bait box and a driving motor, the bait box is in threaded connection with the inner wall of the cylinder, and the driving motor is in threaded connection with the cylinder. The driving motor is fixedly installed on the inner top wall of the top cover, an output shaft of the driving motor is fixedly connected with a connecting rod, the surface of the connecting rod is fixedly connected with a low-voltage power grid, a reciprocating motor is fixedly installed at the lower end of the connecting rod, and an output shaft of the reciprocating motor is fixedly connected with a threaded rod. Compared with the prior art, the hanging type deinsectization device for the dairy cow breeding room is provided with the deinsectization mechanism, the storage bag and the clamping mechanism, after the storage bag is filled with flies, the storage bag can be separated from the cylinder only by pulling an arc-shaped plate outwards, and the killed flies are received through the storage bag, so that the cylinder does not need to be cleaned; and the use of workers is more convenient.

The utility model discloses a three-in-one transformer cabin for a power van, and relates to a structure of a mobile power van. The system comprises a cabin body, power conversion equipment is arranged in the cabin body, a plurality of emergency management assemblies used for controlling the working state of the power conversion equipment are arranged on the outer side wall of the cabin body, and the power conversion equipment comprises low-voltage grid-connected equipment, medium-voltage grid-connected equipment, a ring main unit and mobile box-type substation equipment which are arranged in parallel. The system integrates a low-voltage grid-connected function, a medium-voltage grid-connected function, a power distribution protection function, a complete-set power transformation and distribution function and the like, so that the system is more powerful in function and more convenient to use.

The application belongs to the technical field of power systems, and discloses a low-voltage power grid operation state monitoring method and device, the method comprising: based on a pre-constructed Internet of Things architecture, obtaining operation state data of a target power grid device, and gathering the operation state data to a transformer area fusion terminal; processing the operation state data transmitted by the transformer area fusion terminal, and sending the processing result to a plurality of service terminals; in response to the processing result, each service terminal generates a cooperative monitoring result. The scheme of the application expands the dimension of low-voltage power grid state monitoring, expands the data volume, and improves the real-time performance of state monitoring.

This invention provides an automatic modeling method and system for low-voltage power grid data based on visual data acquisition, relating to the field of low-voltage power grid technology. The method includes: dividing the low-voltage power grid area into multiple sub-regions and constructing multiple local coordinate systems; analyzing the power grid equipment to be acquired and determining at least one matching local coordinate system; configuring a visual data acquisition task template, performing data acquisition to obtain at least one set of equipment modeling data; constructing a multi-region coordinate system transformation model, performing coordinate system transformation to obtain at least one set of equipment modeling transformation data corresponding to the equipment modeling data, and generating visual modeling simulation results for the data acquisition task. This invention solves the technical problem in existing technologies where, in the process of low-voltage power grid data modeling, a large, unified global modeling coordinate system is typically established for data acquisition or modeling of all power grid equipment. While this achieves a unified effect, it is not accurate enough, affecting the true reflection of power grid data and its application effectiveness.

The invention belongs to the technical field of power transmission and distribution of a power system, and particularly discloses an AC-DC three-dimensional interconnected power transmission and distribution system based on a flexible converter, which comprises a power transmission network, a power distribution network and the flexible converter, the power transmission network comprises an extra-ultra-high-voltage power grid, a high-voltage power grid and a medium-low The centralized new energy comprises Saggog new energy, water-wind-light new energy and offshore wind power new energy; electric energy generated by the centralized new energy and the distributed new energy is transmitted to a load through the flexible converter, the power transmission network and the power distribution network. According to the invention, the three-dimensional topological structure containing multi-voltage-level power grid interconnection is constructed, so that integrated calling of centralized new energy and distributed new energy is realized, the capability of a power system for efficient and safe grid connection and consumption of large-scale new energy is improved, and through the AC-DC hybrid power grid constructed based on the flexible converter, the power grid connection efficiency is improved. Electric energy mutual aid and power flow optimization are realized, and the operation flexibility and reliability of a power system are enhanced.