With the rapid development of communication technology, people increasingly need compact and efficient antennas that can operate at multiple frequencies. However, traditional antenna design methods, such as miniaturiz...
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With the continuous promotion of the goal of 'carbon peak, carbon neutral', China is building a new type of powersystem in which the proportion of wind power/photovoltaic energy is gradually increasing, but t...
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Recently, Wind-thermal bundled transmission via LCC-HVDC has become the main way of wind energy development and utilization in my country at present and in the future. The complex interaction between wind turbines, th...
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In practical engineering,DC disturbance will lead to excitation saturation and vibration intensification on transformer core,as well as affecting the normal operation of equipment and power *** to the problem,a new id...
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In practical engineering,DC disturbance will lead to excitation saturation and vibration intensification on transformer core,as well as affecting the normal operation of equipment and power *** to the problem,a new idea is proposed in this *** on the electromagnetic characteristics of DC biased transformer,excitation saturation and core vibration are studied by using excitation-vibration harmonic response analysis *** current is identified through electromagnetic coupling to characterize the excitation saturation ***,vibration harmonic response model is established to analyze core *** characteristics of DC biased Y/△transformer are *** variation of excitation current and core vibration at different DC levels are ***-vibration characteristics of three-phase group transformer and three-phase three-limb transformer are compared and *** experimental platform built,the correctness of simulation results is verified by experimental data,and the effectiveness of the proposed method can be proved.
The networked operation of multiple energy sources is gradually becoming the direction of future powersystem development. The optimal scheduling of the multi-energy network system is an important means to cope with t...
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With the reduction of spectrum resources available in modern communication, higher requirements are put forward for the out of band suppression, frequency selection characteristics and signal-To-noise ratio of the fil...
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This article designs three MIMO antennas for WLAN and WIMAX. The center resonance frequencies are 2.4 GHz, 3.5 GHz, and 5.2 GHz, respectively. The electromagnetic simulation software HFSS is used to design and optimiz...
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Because the antenna is an important passive component in the RF front-end of mobile communication, some studies have found that the combination of EBG and antenna can effectively improve the performance of the antenna...
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Traditional distribution transformers have shortcomings such as poor dynamic characteristics and unreasonable voltage compensation. It is difficult for them to meet the demand for power quality with large-scale integr...
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The inertia control of grid-following direct-drive wind turbines significantly influences the system frequency response pattern afrer disturbances. However, current research has not clearly identified the dominant res...
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