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This paper focused on a new type simulation platform. Restricted by the number of network nodes and time step, traditional all digital simulation platform is not fast enough for the modular multilevel converter Based HVDC (MMC-HVDC). This paper presented a real-time digital-analog hybrid simulation platform including 49-level MMC, described the method of calculating the proportion of the platform...
Based on the parameters of TR Maglev train, a mathematic model of air gap control system with hybrid suspension of electro- and permanent magnet was established. Introduced by the control strategy of state feedback, the start-up characteristics of hybrid Maglev control system were analyzed and compared under the condition of ramp and instantaneous spring inputs. With the disturbances of air gap spring...
Recently, more and more attention has been paid to the power generation from renewable energy resources, such as wind energy, solar energy etc. As one of the interconnecting scheme with power grid of renewable energy resources, voltage source converter (VSC) has been gradually used in power system. Therefore, special attention has also been devoted to research about VSC, such as mathematics modeling,...
This paper proposes an electromagnetic transient model of the voltage source converter (VSC) based HVDC transmission converter station multi-legged transformer. Currently, three phase multi-legged converter transformers are often used in VSC-HVDC schemes. However, VSC-HVDC converter transformers are normally represented as magnetically and electrically independent single phase units when simulating...
The precursor precipitation of InVO 4 was synthesized by co-precipitation using indium trichloride (InCl 3 ), ammonium metavanadate (NH 4 VO 3 ) and ammonia (NH 3 H 2 O) as raw materials. The InVO 4 sols with orthorhombic phase were obtained by hydrothermal treatment (the precursor precipitation solution at 423 K, for 4 h). The precursor and...
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