47 results about "Power reliability" patented technology

The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.

The invention discloses a resident intelligent energy management system suitable for an intelligent power grid. Due to the adoption of the resident intelligent energy management system, peak and off peak load regulation of a power load is realized, and the power quality and power reliability are improved. An intelligent energy management controller and an intelligent electric meter are arranged in the home of each resident; a control terminal is arranged on each controllable domestic appliance and a user switch respectively; a distributed power supply accessing device is arranged on each distributed power supply; the controller is connected with the control terminal and the distributed power accessing device through a Zigbee wireless communication network; the intelligent electric meter is connected with the distributed power supply accessing device and the controllable domestic appliance; the controller is communicated with the intelligent electric meter through a bus; the intelligent electric meter is further connected with the secondary sides of a voltage mutual inductor and a current mutual inductor; the controller undergoes information interaction with a high-level measuring system AMI (Advanced Metering Infrastructure) of a main station through Ethernet communication; the controller is used for controlling switching of the control terminal and the distributed power supply accessing device; the control terminal is used for submitting the state of the switch to the controller; the controller is used for monitoring the state of the switch.

The invention discloses a loudspeaker diaphragm which comprises a ball top part (20) in the center and a folding part (10) at the rim. The folding part (10) is a single layer structure made from a TPEE (thermoplastic polyester elastomer) material layer (2) or is a composite structure provided with at least one TPEE material layer (2). Compared with diaphragms made from TPU materials, the diaphragm of the invention has good toughness and strength, can effectively reduce the vibration frequency, and expand the bandwidth of a product. Further, the diaphragm is also stable in structure and reliable in withstanding power and provides good stability of vibration frequency.

The invention relates to a wind-farm reliability evaluation method, and particularly to a wind-farm reliability evaluation method of considering wind-turbine transmission system fatigue. The method solves the problem that risks cannot be accurately evaluated by existing evaluation methods, and includes the steps of: 1, generating a historical fatigue load time sequence and a fatigue load spectrumof turbines; 2, generating a shafting material performance S-N curve; 3, carrying out fatigue analysis on turbine shafting; 4, establishing a shafting fatigue failure rate model; 5, establishing a Markov model of considering the transmission system fatigue; and 6, using a Monte Carlo method for reliability analysis. The method of the invention has the advantage that possibility that fatigue damageof traditional turbine shafting causes a turbines outage and occurrence probability and caused consequences thereof are considered when it is determined that the turbines are in running or outage status, thus a more accurate turbine outage probability model according with reality is provided in turbine reliability modeling, then accuracy of wind-power reliability evaluation is significantly improved, and an analysis result can be indirectly used for guiding of wind-farm overhaul plans and running plans.

The invention relates to a reliability analysis method in the field of accelerated degradation testing, and in particular to a method based on accelerated degradation electrical parameter for analyzing the reliability of a LED integrated driving power within a LED entire light life cycle based on luminous flux. The method aims at using an electrical parameter to analyze the reliability of the LED integrated driving power so as to obtain the result of influence on the lifecycle of the entire lamp by the driving power. The reliability research for the driving power is based on design perspective. According to the invention, the method aims at addressing the problem of reliability analysis of the integrated driving power within the entire life cycle of the LED lamp, establishes a Wiener-based statistic model in accordance with the accelerated degradation electrical parameter, and conducts model parameter identification in combination with the maximum likelihood method and the MCMC method. The improved identification method reduces sampling requirements with the proviso of better protecting the identification precision by improving the identification method. And eventually, the method can provide a reliability index of the LED integrated driving power within the life cycle of the entire lamp in accordance with the constraints of the life cycle of the entire LED lamp based on luminous flux.

The present invention discloses a reliability power outage event collection integrity analysis and automatic completion method, and belongs to the technical field of power reliability management. Themethod comprises: constructing a unified analysis model for power outage events of distribution networks; collecting the automatically collected discrete user power outage information to generate original power outage events; performing collection integrity analysis on the original power outage events, and searching and positioning incompletely collected power outage line segments and omissively collected users; determining and identifying whether the omissively collected users belongs to the users in real power outage; and automatically completing power outage information for the omissive users in real power outage, and uploading a final power outage event to a reliability service system. The method disclosed by the present invention has strong real-time performance, high accuracy, and asmall amount in calculating and processing data, can improve the integrity and accuracy of automatic integration of power outage data, and can provide strong support for reliability index analysis application and daily service management.

The invention discloses a waveguide switch with a heat dissipating device, and aims to effectively solve the problem of heat dissipation when the waveguide switch transmits high-power radio frequency signals. The heat dissipating device comprises an inner ring, an outer ring and a heat dissipating wire. The heat dissipating device is mounted at the bottom of the waveguide switch, can quickly transmit heat generated by high-power radio frequency signals to an outer casing of a guided stator of the waveguide switch, effectively reduce the temperature difference between a guided rotor and the guided stator, and avoid rotational failures of the waveguide switch, due to expansion of parts caused by over temperature. The waveguide switch provided by the invention has the advantages of simple structure and light weight, unnecessary nonmetallic materials are not used, the heat dissipation potential of the waveguide switch under high-power working conditions is effectively improved, and the overall high-power reliability of the waveguide switch is improved.

The invention discloses a first passage theory-based method for analyzing non-probability power reliability of a vibrating active control system. According to the method, the influences, caused by interval uncertainty of materials, on well-posedness of the active control system is comprehensively considered. The method comprises the following steps: deriving a power response expression of the active control system on the basis of a one-order state-space equation and a state feedback control theory; constructing a non-probability interval process model of controlled structure power response on the basis of an interval mathematic thought and a time varying uncertainty propagation analysis method; and defining a non-probability power reliability index of the vibrating active control system by utilizing a first passage theory and a structure control rate failure criterion, and exploring an efficient and steady solving method. When the method is used for carrying out reliability calculation, the comprehensive influences, caused by material dispersity, on controlled structure power response is embodied, so that necessary and feasible theoretical reference is provided for the fine design of controllers.

The invention discloses a novel parking AGV trolley. The novel parking AGV trolley consists of a bumper, a frame and two sets of symmetrical structures installed on the frame, wherein each set of structures comprises a driving system, a steering system, a vibration attenuation guiding mechanism and a clamping mechanism. The driving system is driven by four electric wheels, all-wheel omni-directional walking can be realized, the effect of bearing a balance car body is reached, and the driving system has relatively high dynamic property; the steering system realizes flexible steering through a swivel bearing and a stepping motor; the vibration attenuation guiding mechanism mainly consists of a spring and a guide rod, and the stability in the transportation process of the trolley is improved;the clamping mechanism comprises a clamping assembly and a clamping adjusting device, the clamping assembly realizes lifting of vehicles, the clamping adjusting mechanism realizes adjustment for thecenter distance of a front clamping device and a rear clamping device, and transportation for vehicles with different distances between shafts can be realized. Compared with the prior art, the novel parking AGV trolley has the advantages of power reliability, steering flexibility, stability in the transportation process and high applicability.

The invention provides a power maintenance operating platform. The power maintenance operating platform comprises a first hoop piece, a second hoop piece, a loading platform and a climbing device, wherein the first hoop piece and the second hoop piece are alternately arranged on a wire pole up and down, the first end of the loading platform is arranged on the first hoop piece, the first end of the climbing device is connected to the second hoop piece, and the second end of the climbing device is connected to the second end of the loading platform far away from the wire bar. The power maintenance operating platform can be used for stably supporting a repairer standing on the loading platform, however the wire pole is slippery in rainy days, therefore the repairer can climb the wire bar successfully to carry out power maintenance operation timely in rainy days, the power supply of the power faulty line can be restored timely, and the powering reliability of a circuit can be improved.

The invention relates to the technical field of electrical equipment and household appliance protection and discloses an arc fault protection device. The device comprises a central processing unit, an output drive circuit and an alarm light. The input end of the central processing unit is connected with output ends of a voltage filtering processor, a first current filtering processor and a second current filtering processor respectively. According to the device, the voltage in a load circuit is acquired through a voltage transformer, the serial current in the load circuit is acquired through a first current transformer, the parallel current in the load circuit is acquired through a second current transformer, and accordingly, the problems of the damage of loads due to the failure of protection caused by distance running of a breaker or the reduction of power reliability caused by the maloperation of conventional arc fault protection breakers are solved by combining with the voltage waveform of arc faults and integrating fault protection with leakage protection on the basis of the arc fault current waveform. The device has the advantages of being complete in protection items and accurate and reliable in breaker action.

The invention discloses conveying equipment capable of achieving goods delivery with a freely-bent track. The conveying equipment comprises a plurality of conveying sections. The conveying sections comprise turnable chain plate conveying mechanisms and underframe mechanisms. Bottom wheels are installed on the bottom faces of the underframe mechanisms. The turnable chain plate conveying mechanismscomprise chain plates, motors and driving wheels. The chain plates are sequentially connected in series end to end. The motors are connected with the corresponding driving wheels. The chain plates aremovably connected through T-shaped connectors. The underframe mechanisms comprise underframes and universal joint mechanisms. The underframes are movably connected through the universal joint mechanisms. The motors are installed on the corresponding underframes, and the driving wheels make contact with the T-shaped connectors to form driving structures of the corresponding chain plates. Accordingto the conveying equipment, the chain plates and the underframes are designed to be a circulation conveying structure capable of being bent left and right and further being bent up and down, the whole conveying mechanism is composed of the multiple conveying sections, the multiple motors can be installed at the head end and the tail end of each conveying section, and thus power reliability is improved; and meanwhile the defects that a conveying device is small in bending amplitude and prone to breaking down in the prior art are overcome.

The invention discloses a power distribution network topological structure optimization method and system, and the method comprises the steps: calculating a corresponding communication signal quality index and a corresponding power reliability index after the topological structure optimization of a power distribution network is carried out through employing each topological optimization scheme, and carrying out the comprehensive analysis of the communication signal quality index and the power reliability index. According to the method, the optimal optimization scheme is screened out to optimize the topological structure of the power distribution network, so that the communication quality of the intelligent switch is ensured to a certain extent, the accuracy of the acquired power parameters is further ensured, and the reliability of the topological structure optimization of the power distribution network is ensured.

The invention provides a main wiring system of a medium-voltage power distribution cabinet. The main wiring system comprises a metering cabinet, a PT cabinet, an incoming cabinet and a feeder cabinet, wherein the metering cabinet comprises a first current transformer, a first fuse, a metering voltage transformer, a first charged display and a first arrester; an incoming line terminal of the metering voltage transformer sequentially passes through the first fuse and the first current transformer and is connected with a medium-voltage bus; an outgoing line terminal of the first current transformer sequentially passes through the first charged display and the first arrester and is grounded; the PT cabinet comprises a three-winding voltage transformer and a second fuse; the incoming line terminal of the three-winding voltage transformer passes through the second fuse and is connected with the medium-voltage bus; the incoming line terminal of the second fuse passes through a second arrester and is grounded. The main wiring system of the medium-voltage power distribution cabinet is simple in structure and convenient to use; the fault rate of the system is reduced; the electric energy quality is improved; the power reliability is ensured; the electric cost expenditure is reduced; and the reliability of a power distribution network is improved.

The invention discloses an ultra-high-voltage direct-current fault scheduling method based on an aggregated constant-temperature control load, and belongs to the field of electric power system emergency circumstance scheduling. The method includes the steps: building an ultra-high-voltage transmission power reliability model based on ultra-high-voltage element fault probability; performing constant-temperature control load individual scheduling capacity modeling based on electric thermal characteristics; performing aggregation modeling on different constant-temperature control loads in the same area based on constant-temperature control load individual scheduling capacity modeling to determine total constant-temperature control load scheduling capacity; combining an aggregated constant-temperature control load scheduling model and a conventional unit scheduling model based on an optimal power flow module, acquiring an optimal scheduling scheme under the ultra-high-voltage direct-current fault scheduling condition, and assessing the scheduling participation degree of the constant-temperature control load. According to the method, the scheduling participation degree of the constant-temperature control load is assessed, total scheduling capability of a system is improved, the running reliability of a receiving end network of an ultra-high-voltage direct-current system is effectively improved, and the total scheduling cost of the system can be reduced.

The invention discloses a wind farm active power distribution method based on second-price sealed auction. The method is completed under cooperation between a wind farm active power controller and each wind turbine; the wind farm active power controller initiates power generation right auction to each wind turbine successively, and an auction end time is judged; according to the actual condition of the turbine, each wind turbine controller decides auction bid at each time; according to the bid of each turbine, the wind farm active power controller selects a turbine which wins the bid at each time according to a second-price sealed auction principle, and the corresponding power generation right is distributed to the turbine which wins the bid; and after the auction is ended, the power generation right acquired accumulatively by each turbine is the reference power for operation of the wind turbine. The method of the invention can promote the turbine to compete for the power generation right according to the real conditions of the self wind speed, the health condition and the output features, the wind farm active power reliability is ensured, the technical competition between the turbines is promoted, and the complexity of the wind farm active power control system is reduced.

The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.

The invention discloses a resident intelligent energy management system suitable for an intelligent power grid. Due to the adoption of the resident intelligent energy management system, peak and off peak load regulation of a power load is realized, and the power quality and power reliability are improved. An intelligent energy management controller and an intelligent electric meter are arranged in the home of each resident; a control terminal is arranged on each controllable domestic appliance and a user switch respectively; a distributed power supply accessing device is arranged on each distributed power supply; the controller is connected with the control terminal and the distributed power accessing device through a Zigbee wireless communication network; the intelligent electric meter is connected with the distributed power supply accessing device and the controllable domestic appliance; the controller is communicated with the intelligent electric meter through a bus; the intelligent electric meter is further connected with the secondary sides of a voltage mutual inductor and a current mutual inductor; the controller undergoes information interaction with a high-level measuring system AMI (Advanced Metering Infrastructure) of a main station through Ethernet communication; the controller is used for controlling switching of the control terminal and the distributed power supply accessing device; the control terminal is used for submitting the state of the switch to the controller; the controller is used for monitoring the state of the switch.

The invention discloses a waveguide switch with a heat dissipating device, and aims to effectively solve the problem of heat dissipation when the waveguide switch transmits high-power radio frequency signals. The heat dissipating device comprises an inner ring, an outer ring and a heat dissipating wire. The heat dissipating device is mounted at the bottom of the waveguide switch, can quickly transmit heat generated by high-power radio frequency signals to an outer casing of a guided stator of the waveguide switch, effectively reduce the temperature difference between a guided rotor and the guided stator, and avoid rotational failures of the waveguide switch, due to expansion of parts caused by over temperature. The waveguide switch provided by the invention has the advantages of simple structure and light weight, unnecessary nonmetallic materials are not used, the heat dissipation potential of the waveguide switch under high-power working conditions is effectively improved, and the overall high-power reliability of the waveguide switch is improved.

A reliability prediction method for a power field effect transistor belongs to the technical field of power MOSFET reliability modeling. The present invention is to solve the problem of low work efficiency caused by manually adjusting model hyperparameters in the existing deep learning model for reliability prediction of power devices. It includes: S1, collecting sensor data as initial data and performing data processing on the initial data; S2, optimizing the hyperparameters of the Transformer model using a genetic algorithm to construct a GA-Transformer model; S3, transmitting the data obtained by S1 to the GA-Transformer model obtained by S2, evaluating the accuracy of the prediction based on performance indicators, predicting the remaining service life RUL, and outputting the reliability prediction result. The present invention is used for power MOSFET reliability prediction.

The invention discloses a loudspeaker diaphragm which comprises a ball top part (20) in the center and a folding part (10) at the rim. The folding part (10) is a single layer structure made from a TPEE (thermoplastic polyester elastomer) material layer (2) or is a composite structure provided with at least one TPEE material layer (2). Compared with diaphragms made from TPU materials, the diaphragm of the invention has good toughness and strength, can effectively reduce the vibration frequency, and expand the bandwidth of a product. Further, the diaphragm is also stable in structure and reliable in withstanding power and provides good stability of vibration frequency.

The invention provides a method for monitoring and counting power supply reliability of the terminal of a power grid. The method is carried out through an electric energy meter arranged at the terminal of the low-voltage power grid. The electric energy meter comprises an electric energy metering unit, a main control unit, a human-machine interface unit, a storage unit, a real-time clock unit, a communication interface unit and a power module. The method includes the steps of 1, initialization of the electric energy meter; 2, power-on time recording; 3, power-down time recording; 4, power failure time counting; 5, power supply reliability counting. The method is simple, practical and reliable, the power supply reliability of the terminal of the low-voltage power grid can be effectively monitored and counted, the gap for monitoring and counting the power supply reliability of the terminal of the power grid in the prior art is filled in, and an effective information support is provided for a power supply department to improve the power supply quality of the terminal of the power grid.

The invention provides a power maintenance operating platform. The power maintenance operating platform comprises a first hoop piece, a second hoop piece, a loading platform and a climbing device, wherein the first hoop piece and the second hoop piece are alternately arranged on a wire pole up and down, the first end of the loading platform is arranged on the first hoop piece, the first end of the climbing device is connected to the second hoop piece, and the second end of the climbing device is connected to the second end of the loading platform far away from the wire bar. The power maintenance operating platform can be used for stably supporting a repairer standing on the loading platform, however the wire pole is slippery in rainy days, therefore the repairer can climb the wire bar successfully to carry out power maintenance operation timely in rainy days, the power supply of the power faulty line can be restored timely, and the powering reliability of a circuit can be improved.

An impedance transformation circuit and a radio frequency power reliability test system are provided. The impedance transformation circuit can be used in a radio frequency power measurement system. The radio frequency power measurement system includes a signal generator, a buffer, a device under test, an attenuator, and a spectrum analyzer. The impedance transformation circuit includes a plurality of impedance transformers, which correspond to a plurality of impedance points on a reflection coefficient circle of a Smith chart, respectively. In a radio frequency power reliability test, the impedance transformers are alternatively coupled between the device under test and the attenuator in turn, and the spectrum analyzer is configured to measure an output power corresponding to each of the impedance points, such that two of the impedance points respectively corresponding to a maximum output power and a minimum output power are found by the radio frequency power measurement system.

The invention provides a fault processing method, device and flexible direct current transmission system. The method includes: responding to the fault signal of the flexible direct current transmission system, blocking the fault processing sub-module; obtaining the current of the transmission line; based on the current falling to the first current threshold, controlling the fault processing sub-module to switch to uncontrolled rectification after the deionization time The operation mode; determine the fault state of the flexible direct current transmission system according to the current; control the fault processing sub-module according to the fault state. Therefore, it is possible to identify the fault state after the end of the deionization stage, unlock only after it is judged as a transient fault, and re-block the faulty pole converter after it is judged as a permanent fault, isolate the faulty line, and realize the automatic failure of the flexible DC transmission system. Adaptive recovery avoids unnecessary shocks and delays in stability control actions caused by repeated recovery operations under permanent faults, which is conducive to improving system stability and power supply reliability.

This application provides an optimized scheduling method, system, equipment, and storage medium based on microgrids, belonging to the field of energy dispatching technology. The method includes: calculating power reliability parameters corresponding to distributed power sources, energy storage health parameters corresponding to energy storage devices, and load demand parameters corresponding to loads based on microgrid operation monitoring data; inputting the power reliability parameters, energy storage health parameters, and load demand parameters into a pre-trained decision tree model to obtain the microgrid's operating state; the microgrid includes distributed power sources, energy storage devices, and loads; the microgrid's operating state includes normal operation and abnormal power supply states; determining a target scheduling mode based on the microgrid's operating state; the target scheduling mode includes either a normal mode or an emergency mode; determining scheduling strategy adjustment parameters based on the target scheduling mode; and using the scheduling strategy adjustment parameters for optimized microgrid scheduling. This application can improve the stability and reliability of microgrid operation.

The application discloses a kind of offshore ship energy management method and system based on pyramid diversification attention, method includes: collecting ship operation data, and carry out data fusion processing;Performing convolutional neural network-based extrusion and excitation initialization operation;With the data after fusion as input, the power output mode of offshore ship is output, constructs pyramid diversification attention network classification model, including main CNN, local CNN, global CNN and energy management mode classification layer, wherein CNN is the abbreviation of convolutional neural network;The local CNN includes pyramid attention module, diversification learning module, hierarchical bilinear pooling module;Through the power output mode of offshore ship, perform electronic converter action to carry out power distribution.Based on power electronics technology, by controlling the operating mode of electronic converter, the switching of different power output modes is realized, so as to improve the power reliability of key load and ensure the stable operation of ship.

The invention relates to the technical field of power dispatching of a power system, in particular to a reliability-based high-renewable energy power system multi-region intra-day dispatching method, which comprises the following steps of: constructing a power reliability index system of a multi-region power system; constructing a power system dispatching model; calculating the output power of the direct-current line through the power system dispatching model; generating a unit combination operation scheme based on the DC line output power through a model prediction control method; calculating a power reliability index by combining a power reliability index system based on the unit combination operation scheme; feeding back the power reliability index to the power system dispatching model to update the constraint; and iteratively updating the unit combination operation scheme at each moment, and realizing the scheduling of the conventional unit and the wind turbine unit in the multi-region power system at each moment. The active power scheduling problem of the multi-region power system can be effectively improved, and the operation reliability of the multi-region power system is improved.