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this paper proposed a control strategy for STATCOM based on particle swarm algorithm (PSO) according to online adaptively adjusted the parameter of PI control loop. Reactive power optimal compensation of bus voltage can be realized under various disturbances. Electromagnetic transient simulation model of small scale power grid with STATCOM device has been built. Conventional double closed-loop control...
AlGaN/GaN metal-oxide-semiconductor high electron mobility transistors (MOSHEMTs) with thick (>30 nm), high-κ (TiO2/NiO), submicron-footprint (0.4 µm) gate dielectric on SiC substrate are demonstrated, which are found to exhibit low gate leakage current (∼ 1 nA/mm of gate periphery), high IMAX (1 A/mm), and high drain breakdown voltage (188 V). The derived current gain cutoff frequency is 30 GHz...
39 industry sectors in Shandong province were divided into three societies. In Society II an industrial chain linked with industries most closely was identified. Economical scale and pollutant emission of the industrial chain both had an important position in Shandong province. Ridge regression method was applied for respectively constructing models of industrial waste water, solid waste emissions...
Because the buses inside HV switchgear cabinet are under high voltage condition, the very high voltage between the contacts of high-voltage switch or between high-voltage buses makes the direct measurement of its temperature a very difficult problem which has not been solved in practice so far. For these reasons, a method to measure the temperature of the bus-bar for switchgear cabinet on-line monitoring...
This paper presents electronic ballast that can supply five independent high press sodium lamps. The main contributions are as the follows: Half-bridge topology is used, putting one LCC out filter to each lamp of the ballast, parallel distributed between both switch, frequency sweep method was used to start up the five lamps. It is possible to supply any numbers (<5) of lamps. A lighting system...
This paper presents electronic ballast that can supply five independent high press sodium lamps. The main contributions are as the follows: Half-bridge topology is used, putting one LCC out filter to each lamp of the ballast, parallel distributed between both switch, frequency sweep method was used to start up the five lamps. It is possible to supply any numbers (<5) of lamps. A lighting system...
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