52results about How to "Improve reliability index" patented technology

The invention relates to a power dispatching automation method and a power dispatching automation system based on a 'cloud computing' dispatching application. A dispatching application service module is deployed in a cloud server. A dispatching pre-processing unit and a historical database are deployed in a local server. Data acquired by substation RTUs is transmitted via a dispatching data network to the dispatching pre-processing unit to complete data acquisition and analysis. Real-time data is transmitted via a broadband network to the dispatching application service module and an upper dispatching module. Historical data is saved to the historical database through a local data interface. A dispatching workstation terminal issues a service request to a scheduling application, and the dispatching application service module triggers a corresponding service and deals with related affairs, and feeds a result back to the request initiator immediately after getting the result, so as to realize power dispatching automation function operation. Deployment is simple. A variety of options can be provided for dispatchers in the aspects of hardware resources, dispatching terminal equipment type and access network type, so that system hardware investment and maintenance are reduced, and the reliability of the system and the flexibility of power dispatching are improved.

The invention provides a reliability design optimization method for an avionic device. By means of the reliability design optimization method for the avionic device, the reliability index of the device can be practically and effectively promoted in the design stage. According to the technical scheme, the method comprises the following steps that three-dimensional digital prototype modeling is conducted according to an avionic device design scheme; on the basis of a three-dimensional digital prototype, environmental stress digital prototype modeling is conducted according to a device working load, an environmental load and design information relevant to device characteristics, and a model is corrected and verified; thermal environment stress, mechanical environment stress and the like of the avionic device are analyzed by referring to environmental conditions, environmental stress weak links of the device are searched, and corresponding avionic device design optimization is conducted; a fault physical digital prototype model is built, environmental stress analysis results are introduced to conduct device fault risk prediction, avionic device design optimization is conducted aiming at the reliability weak links occurring in the analysis process, and the reliability level of the avionic device is evaluated according to the optimized fault risk distribution situation.

The invention relates to a linear voltage stabilizer with current-limiting short circuit protection. The linear voltage stabilizer comprises a starting circuit, a reference voltage circuit, a comparison amplifying circuit, a short circuit protection circuit, a current sampling circuit, a voltage sampling circuit and an adjusting pipe, wherein the starting circuit delivers the input voltage sourceinto the reference voltage circuit; the reference voltage circuit provides the adjusted reference voltage to the comparison amplifying circuit; an output end of the adjusting pipe is connected in series with the current sampling circuit; the current sampling circuit feeds back the sampled output current signal to the comparison amplifying circuit; the voltage sampling circuit feeds back the sampled output voltage signal to the comparison amplifying circuit; the comparison amplifying circuit processes the output current signal and the output voltage signal and delivers to a control end of the adjusting pipe so that the adjusting pipe works in a linear area and the aim of current limiting and voltage regulation is achieved; and the short circuit protection circuit processes the acquired output voltage signal and delivers to the control end of the adjusting pipe so that the adjusting pipe is adjusted from the linear area to a shutoff area and the aim of short circuit protection is achieved.

The invention discloses a constant-current source driver circuit used for driving an LED illumination light source and an integrated current source device based on the circuit. A low-cost resistance-capacitance voltage-reduction type drive circuit is simple in structure and low in cost, but has the disadvantages of poor performance and low efficiency, and damages an LED light source device to a certain extent; a series voltage stabilization type circuit has the disadvantages of large volume, heavy weight, high heat generation, low efficiency and energy waste; and a PWM voltage-stabilizing or constant-current power supply has relatively good performance and higher efficiency, but has higher cost and an important problem of introducing EMI electromagnetic interference. The constant-current source drive circuit has the advantages of good constant-current effect, low cost, high efficiency, long service life and no EMI. The key point to achieve the advantages lies in adopting a CRD device to provide stable base current for a regulating tube so as to greatly improve the overall constant-current technical index on the premise of keeping simple structure and low cost of the constant-current circuit.

The invention discloses a complex power distribution network fault positioning method based on the voltage sag information. The method comprises steps that (1), the fault over-current information reported by a feeder monitoring terminal is utilized to preliminarily determine a fault section; (2), the current vector information of a fault uploaded by the feeder monitoring terminal is utilized to determine fault point short circuit current magnitude; (3), the fault point short circuit current magnitude is calculated through utilizing the voltage sag information uploaded by each monitoring point and a system node impedance matrix; and (4), traversal of each node of the system is carried out, a short circuit current offset value is calculated, and a fault node is determined. The method is advantaged in that precise fault positioning of the complex power distribution network is realized, for the actual power distribution network having relatively large-quantity branch lines and the complex structure, the positioning result is relatively accurate, influence of the branch lines can be avoided, influence of grounding resistance, a load model and fault types on the result is relatively small, shortening the fault inspection time of the power distribution network and the user power failure time is facilitated, and a reliability index of the power distribution network is improved.

The invention relates to an electric power unified video monitoring platform equipment fault diagnosis early warning method. The method comprises steps of rapid equipment fault diagnosis analysis and positioning, diagnosis fault early warning and fault data analysis. The method is advantaged in that automatic diagnosis analysis positioning of a blank screen and error code faults existing in a platform video equipment operation process can be realized, operation and maintenance personnel is facilitated to rapidly realize troubleshooting, position fault causes and solve problems, and operation and maintenance efficiency is improved. The method is advantaged in that multi-dimension analysis on the equipment fault causes, fault types, fault frequency, typical fault regions and typical fault scenes is carried out to form an equipment operation defect database, data support is provided for later video monitoring equipment model selection and network configuration standardization, operation personnel workload is effectively reduced, operation maintenance efficiency is improved, and the platform reliability index is improved.

The invention discloses a memetic algorithm-based method for researching optimal configuration of switches of power distribution networks. The method comprises the following steps of comprehensively considering the balance of economy and reliability by taking a minimum power supply zone as a basic analysis unit, calculating the differences between a manual switch and a remote control switch, and establishing a mathematic model for optimizing a section switch and an interconnection switch at the same time on the basis of a cost-benefit theory; importing a memetic algorithm, and combining an intelligent algorithm and a local search strategy to optimize the mounting quantity and positions of the section switch and the interconnection switch; and carrying out analysis by applying an IEEE RBTS-BUS 2 system, and the results show that load capacities at two ends of the switches need to be basically balanced and then the effectiveness of the method is verified.

The invention discloses a user adjustable load resource demand response method and system based on a virtual power plant. The method comprises the following steps: collecting and obtaining a user to be investigated according to an industry attribute and an electrical load of each user; identifying a to-be-investigated user with load adjustable equipment as a user participating in power demand response, and collecting adjustable load resources of the users; establishing an adjustable load technical economic model based on marginal cost, and establishing a capacity model of the maximum adjustable load based on safety constraints; therefore, an electric power real-time demand response adjustment algorithm model is formed; and when the demand response item is started, the operation state and the adjustable load resource of the adjustable load equipment of each user are taken as input data, and the power real-time demand response adjustment algorithm model is utilized to calculate the load regulation and control index of each user and carry out load regulation and control. According to the method, the power peak load is reduced, economic and reputation loss caused by orderly power utilization of the power grid is avoided, the maximum load of equipment at the peak load is reduced, and the operation capability of the power grid is improved.

The invention discloses a server and a double-link backup method thereof. In the method, one or more long-time online addresses are selected as reliable link addresses by the server, and double-link IP addresses supported by the server are set as a master address and a slave address; when the server arrives at preset time, a link request is initiated to a reliable link address based on the primary address, if the link succeeds, the primary address external service is bound, and a gateway correspondent to the master address is set as a default gateway; otherwise, the server initiates a connection request to a reliable link address based on the slave address, if the link succeeds, the slave address external service is bound, and a gateway correspondent to the slave address is set as a default gateway; and if the link fails, external service is not provided. The method realizes double-link hot backup of servers on Windows platform to greatly improve reliability index of servers.

The invention discloses a weak link identification method for a power distribution network. The method comprises the following steps of (1) building a topology model of the power distribution network, forming a topology diagram of the power distribution network according to an actual connection diagram of the power distribution network and generating a main transformer capacity matrix, a tie line connection relationship matrix and a tie line capacity matrix; (2) calculating the power supply capacity of the power distribution network by using existing information of the power distribution network, comparing with the actual operation condition and troubleshooting weak links; and (3) traversing a topology of the power distribution network and troubleshooting all weak links; and (4) comprehensively judging all possible weak links to form a weak link set. The weak links of a transformer and a tie line of the power distribution network are accurately judged by virtue of the transformer capacity, the tie line transmission capacity limitation and the network structure topology connection relationship of the power distribution network, occurrence and consequence of a fault are accurately pre-judged, and identification of the weak links of the power distribution network and shortening of the maintenance time of the power distribution network and the customer interrupt time are facilitated.

The invention provides a wireless data transmission method, which comprises the following steps of: copying service data to be sent to obtain at least two pieces of service data; Respectively sendingthe at least two pieces of service data through M transmission channels; And enabling the receiving end to receive the sent data in the N channels and recover the original service data, wherein N is an integer greater than 2. The invention also provides a corresponding wireless data transmission system. According to the method, the system design difficulty supporting high reliability and low timedelay is solved, the reliability index of the service is improved through flexible system frame structure design, flexible frame configuration and multi-channel transmission strategy combination.

The invention relates to a cylindrical roller bearing retainer and relates to the field of bearing processing. In order to solve the problem that a pocket of an existing bearing retainer in a using process is worn and broken, the device comprises a body and a cross beam. A stress buffer slot which is a 2/3 to 3/4 circle is processed in a transitional position of the body and the cross beam. N Oiltanks are processed in the cross beam. The oil tanks are semicircles which are sunken along the radial direction of the cross beam. N is a positive integer. By adopting the device, a phenomenon of stress concentration can be avoided, the shock resistance of the retainer is improved greatly, and the problems of cracks and raptures at the corners of the pocket can be solved. The using reliably and safety of a product bearing are guaranteed as a result of the structural design and the dimensional precision control of the pocket of the retainer. The reliability index of the bearing can be improvedto 1.3 times. The device can be widely applied to the field of bearing processing.

The invention provides a controller management method for a ship power station. The ship power station is internally provided with a plurality of power stations, wherein each power station is provided with one or more sets. The monitoring method is characterized by comprising the steps of configuring a set controller for each set, configuring a regional controller for each power station for controlling one or more sets and the corresponding set controllers of the power station, presetting a priority level for each regional manager, forming the sets in each region into a power supply echelon when the power stations operate, and controlling the power supply echelons according to the priority levels of the regional managers, wherein the priority levels of the regional managers are different. The management method puts forward distributed multilevel control system architecture design and multi-controller authority management for the first time and has a higher reliability index than the conventional power station monitoring system.

The invention relates to the field of fiber processing, and provides a fiber ceramic insertion core tail handle for the purpose of effectively preventing fibers from falling off. The fiber ceramic insertion core tail handle disclosed by the invention comprises an optical cable with the fibers being stripped, and a ceramic insertion core and a tail seat which are connected in a sleeved mode. The optical cable with the fibers being striped is inserted into a space reserved by the ceramic insertion core and a shaft in the fiber ceramic insertion core tail handle and is fixed through casting glue. The optical fiber with the fibers being stripped, which is fixed in the tail seat, is an optical cable whose optical cable fiber skin is provided with a recess. According to the invention, through arranging the recess in the optical cable, the fiber ceramic insertion core tail handle is provided with a convex ridge as a bayonet, the tail seat is crimped with and is in interference fit with the ceramic insertion core, based on this, through glue perfusion and high-temperature solidification, at the time when a glue amount is increased, the solidified glue can form an enclosed fixation sleeve among the optical cable, the tail seat and the ceramic insertion core, and the press mark of the optical cable is reversely hooked on the solidified 353ND glue in a step form, such that when reliability tests such as high temperature and high moisture, TC, tension tests and the like are carried out, the problem that the optical cable falls off is radically prevented, and the reliability index of the optical cable is improved.

The invention relates to a zero leakage hydraulic lock which comprises a valve body, a left end cover, a right end cover, a left spring, a left movable door, a left valve base, a right spring, a right moveable door, a right valve base and a sliding valve element, wherein an oil port A, an oil port A1, an oil port B and an oil port B1 are arranged on the valve body; a first soft sealing ring is arranged on the left movable door; a first penetrating hole and a first annular platform are arranged on the left valve base; the first annular platform is pressed on the first soft sealing ring; a second soft sealing ring is arranged on the right moveable door; a second penetrating hole and a second annular platform are arranged on the right valve base; the second annular platform is pressed on the second soft sealing ring; a left jacking rod of the sliding valve element is opposite to the left movable door; a right jacking rod of the sliding valve element is opposite to the right moveable door; the oil port A is communicated with the right end of the first penetrating hole; the oil port A1 is communicated with the left end of the first penetrating hole when the first soft sealing ring is separated from the first annular platform; the oil port B is communicated with the left end of the second penetrating hole; and the oil port B1 is communicated with the right end of the second penetrating hole when the second soft sealing ring is separated from the second annular platform. The zero leakage hydraulic lock has the advantages of excellent sealing property and high reliability.

The invention provides a triplex redundancy whole electric braking actuation system, and relates to the technical field of aircraft parking. The triplex redundancy whole electric braking actuation system comprises three actuators, an actuating bracket, a brake disc assembly and an airplane wheel; the airplane wheel is of a cylindrical structure vertically arranged; the brake disc assembly is fixedly mounted at the axial top end of the airplane wheel; the actuating bracket is of a disc structure; the actuating bracket is horizontally and coaxially placed on the upper surface of the brake disc assembly; the three actuators are fixedly mounted on the upper surface of the actuating bracket; the three actuators are uniformly and annularly distributed taking the axis of the actuating bracket asthe center of a circle; the distance from the center of the actuators to the axis of the actuating bracket is 83-87mm; and the two adjacent actuators take the axis of the actuating bracket as the center of the circle, and an angle of the two adjacent actuators is 120 degrees. According to the triplex redundancy whole electric braking actuation system, high-reliability braking schemes with small volume and light weight are provided for a whole electric airplane/a heavy truck and the like.