摘要:
The application provides a method and apparatus for analyzing reliability of a cyber-physical system (CPS) of a very-large-scale (VLS) battery energy storage power station, which solves a problem that due to large and complex topology of communication and monitoring systems of a VLS battery energy storage power station, operation efficiency thereof is greatly reduced and the danger of power station shutdown may be caused when a communication and monitoring device fails. The method includes the following operations. Information disturbance data is obtained based on a preset reliability model of an information system. A failure rate and a repair rate of a cyber-physical interface apparatus are obtained based on a preset reliability model of the cyber-physical interface apparatus. A reliability model of the CPS of the VLS battery energy storage power station is obtained based on a preset reliability model of a physical system, the information disturbance data and the failure rate and the repair rate of the cyber-physical interface apparatus. A reliability index of the VLS battery energy storage power station is obtained based on the reliability model of the CPS of the VLS battery energy storage power station.
摘要:
The present invention provides a retreat preventing apparatus, comprising: a base (1) for providing support, a detecting assembly provided on the base (1) for detecting the movement direction of a winch traction rope, and a braking assembly provided on the base (1) and connected to the detecting assembly; the detecting assembly triggers the braking assembly at the time of the movement of the winch traction rope in an opposite direction detected by the detecting assembly, so as to make the braking assembly clamp the winch traction rope. The apparatus of the present invention can automatically detect the movement direction of the winch traction rope and can timely clamp the winch traction rope when the traction rope moves in an opposite direction, thereby preventing retreat from generating and avoiding various accidents caused by retreat.
摘要:
The invention relates to a transformer substation multi-target accurate positioning system, which comprises an intelligent positioning terminal, a sound positioning beacon node and a wireless data transmission base station. The intelligent positioning terminal can match with the sound positioning beacon node so as to perform a time synchronization on the sound positioning beacon node, and then send an ultrasonic positioning signal; the sound positioning beacon node can decode the ultrasonic signal sent by the intelligent positioning terminal to obtain positioning information by matching with the intelligent positioning terminal so as to perform the time synchronization, and transmit the positioning information to the wireless data transmission base station; and the wireless data transmission base station processes the positioning information transmitted by the sound positioning beacon node so as to obtain a position coordinate of an operator wearing the intelligent positioning terminal. The invention can position site plants in the transformer substation, identify and dynamically position the operator, ensure that the operator operates according to rules, and provide alarm bases for a violation operation which is out of scope or time, which is performed on wrong operation objects, or which destructs safety precautions.
摘要:
A data transmission method includes: upon initial transmission of data, a data transmission terminal acquiring the type and construction information of the data, and encoding the type and construction information and the data for transmission to a data reception terminal, and the data reception terminal decoding the received type and construction information and data; and upon subsequent transmission of data, the data transmission terminal encoding the data for transmission to the data reception terminal, and the data reception terminal decoding the received data according to the type and construction information. According to the invention, at the data transmission terminal, it is unnecessary to make an analysis to acquire the type and construction information of the data in each transmission, to thereby dispense with a significant workload of data compilation, save communication resources and reduce the time for processing the data. Also, the data transmitted subsequently by the data transmission terminal does not include the type and construction information of the data, causing the transmitted data packets to be relatively small to thereby facilitate rapid and efficient transmission of the data.
摘要:
A passive high-voltage direct-current circuit breaker and an implementation method therefor. The high-voltage direct-current circuit breaker is connected in a direct-current system in series, and comprises an energy absorption branch, a main branch and a current transfer branch which are connected in parallel, wherein the current transfer branch comprises first current transfer branches (T1, T2) and second current transfer branches(T3, T4); the energy absorption branch is composed of a nonlinear resistor (MOV); and the main branch comprises at least two groups of high-speed mechanical switches (Kl, K2) and at least two groups of full controlled device modules which are connected in series. Since the circuit has a simple topology structure, is simple and convenient to control, and is flexible to apply, the energy required by injecting a current into a capacitor can be obtained from a system without configuring an auxiliary power source, thereby improving the reliability of an apparatus. The used power electronic devices are mainly half controlled thyristors, so that the series connection technology is mature, the capability for current segmentation is strong, the level of withstand voltage is high, the expansion capability is strong, and the costs of devices are low.
摘要:
The present invention discloses a centralized monitoring system for transmission line inspection of unmanned aerial vehicles, including a centralized monitoring subsystem, mobile substations and unmanned aerial vehicle flight platforms. The centralized monitoring subsystem is connected with the mobile substations in a one-to-many mode, the mobile substations are connected with the unmanned aerial vehicle flight platforms in a one-to-one mode, in a manner of combining remote centralized monitoring with local monitoring, centralized monitoring is carried out on the flight states, pod states, transmission lines, inspection results and other information of more than one accessed unmanned aerial vehicle for line inspection, personnel, equipment and inspection lines involved in an unmanned aerial vehicle inspection task are planned and managed, and centralized management and defect diagnosis are carried out on the inspection results, so as to reinforce the informatization and automation degrees of the unmanned aerial vehicle inspection process and inspection result processing, improve the unmanned aerial vehicle inspection efficiency, and provide technical supports for achieving safe and reliable operation of unmanned aerial vehicle line inspection.
摘要:
Provided are a method for identifying an overcurrent in an electric cable and a device for the same. The method includes: detecting whether a single-phase overcurrent occurs in three-phase current signals; determining an indicator feature vector sample of an overcurrent phase current signal in a case that it is detected that the single-phase overcurrent occurs in the three-phase current signals; calculating association coefficients between the indicator feature vector sample and predetermined indicator vector reference samples of indicators, where the indicator vector reference samples respectively correspond to reasons for the single-phase overcurrent; calculating association degrees between the indicator feature vector sample and the predetermined indicator vector reference samples based on a predetermined indicator weight vector and the association coefficients corresponding to the indicators; and finding a reason for the single-phase overcurrent, which corresponds to an indicator vector reference sample having a maximal association degree. Hence, an incipient failure of the electric cable is identified.
摘要:
The present disclosure provides a blockchain-based green power certification method, apparatus, and system, to pre-process obtained basic data to obtain proof of existence data, certify the proof of existence data from a production side and a consumption side by using a certification chain and a token chain respectively, and obtain a green power attribute certificate and a green power consumption label if the certification is passed; generate a unique digital identifier for the green power attribute certificate and the green power consumption label separately based on a non-fungible token (NFT), which realizes non-interchangeability, indivisibility, and other characteristics of the certificate and the identifier; and supervise and verify a certification process by using a chain of custody, and generate a corresponding unique blockchain identifier for the certification chain, the token chain, and the chain of custody separately through multi-chain interaction, so as to realize data interaction between blockchains. This resolves problems of an inaccurate certification mechanism of renewable energy, and information asymmetry and data opaqueness in attribute certification and consumption evaluation processes of the renewable energy.