This paper introduces the research on the key technology of bending control of strain clamp for transmission line. Through the development of special measurement tools, the introduction of intelligent measurement and data analysis functions, and the improvement of design to meet the needs of high-altitude operation, the problem of bending of strain clamp in the process of crimping is solved, and the quality control ability and detection efficiency and accuracy of crimping process are improved to ensure the operation reliability and safety of transmission line. Through the research and implementation of this scheme, it can not only reduce the transmission line fault caused by crimping quality defects, but also significantly reduce the labor intensity of construction personnel, improve the working environment, and promote the mechanization and intelligent development of transmission line construction technology.
This paper briefly introduces the basic principles and types of vehicle grounding,and conducts in-depth investigation and analysis on the distribution of ground current,the principle of drift current,and the path of drift current.Combined with practical tests,the vehicle electrical system under a new 2.0 architecture platform simulates the environment of ground closing and breaking,and accurately monitors the current through IPE equipment,and furthermore,a method for determining the safety of wire harnesses is proposed.Based on analyzing drift current path,it is found that the harness with risks meets the design requirements.The potential risks caused by the drift current are optimized and rectified by means of changing and disassembling the ground point,and thickening the drift current ground wire.Post-rectification re-simulation on the grounding disconnection environment shows that the rectification achieves stable and safe grounding,and effectively ensures the functional operation of the 2.0 architecture platform.
In response to the gradual exhaustion of fossil energy and the worsening of the climate environment,global new energy power generation has developed rapidly.However,large-scale grid integration of new energy generation has not on-ly brought a great impact on the conventional energy market to maintain a balance of supply and demand,but also brought certain uncontrollable factors to the electricity market.In order to achieve full potential of the incentive role of electricity prices to mobilize the enthusiasm of both supply and demand,and to improve the level of consumption of new energy,a virtual power plant bidding strategy based on continuous bidirectional auctions is proposed.The applicable conditions,transaction methods,and transaction rules of electricity market transactions based on continuous bidirectional auctions are analyzed to establish a quotation function that conforms to the transaction psychology of buyers and sellers,and to per-form user cost calculation and error processing.Through multiple simulation tests,it is compared under the hidden bid auction.The new energy consumption efficiency and social welfare have verified that the proposed continuous bidirectional auction-based bidding strategy for virtual power plants is conducive to the full consumption of new energy and the healthy development of the electricity market.
This paper presents a prediction-based method to generate load transfer strategy for intelligent distribution net-work.The method obtains section data of system operation from power distribution monitoring system.According to the primary model information and equipment operation status of the system,the topology structure of the system operation is calculated through the topology service to provide a basis for load transfer.System prediction results are obtained from the prediction system,topology and prediction results are input into the load transfer expert system,and the transfer strategy is calculated and generated according to the weight configuration of the transfer.The transfer strategy is stored in the da-tabase or displayed on the interface to provide decision-making basis for operators.
The voltage gain range in the over-resonant region of CLLLC resonant converter under pulse frequency modulation (PFM) at light load is insufficient. Phase shift modulation (PSM) can only realize the buck function, and the load switching perturbation has a large impact on the output voltage. In response to the above problem this paper proposes a variable frequency and phase-shift control method that can freely switch the control mode according to the input voltage range to achieve a wide voltage range soft switching and output voltage stability. The system model is acquired by the extended descriptive function method and reduced to the second order. The second-order linear active disturbance rejection control (LADRC) strategy is introduced to reduce the impact of the load casting perturbation on the output voltage and improve the dynamic performance of the system. Finally, the correctness of the theoretical analysis and the effectiveness of the control strategy are verified by PLECS simulation.
