Tài liệu tiếng anh Điện tử công suất mạch MERS A new AC current switch called MERS with low on state voltage IGBTs for renewable energy and power saving applications

. A New AC Current Switch Called MERS with Low On- State Voltage IGBTs (1.54 V) for Renewable Energy and Power Saving Applications Ryuichi Shimada ∗ , Jan. discharge lamps [6]. With a high efficient configuration, energy savings can be achieved with low cost. Voltage and power factor control of induction motors

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. that variable compensation is needed to maintain rated voltage. III. SVC MERS C ONFIGURATION AND O PERATION P RINCIPLE A. Configuration The configuration. Effect of excitation capacitor isolated or stand-alone condition, capacitor is usually used. This system is called SEIG. A variable capacitor is required in

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. value to zero. The power factor is reduced for load voltages lower than rated and will be in the leading area. The load voltage and connecting power factor. (4):102–103, April 2000. [2] Jan A. Wiik, Taku Takaku, Fransisco Danang Wijaya, Tadayuki Kitahara, and Ryuichi Shimada. Improvement of synchronous generator characteristics

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. tubes MERS capacitor 5uF to 40uF film capacitor according to load inductance Parallel connection units Not limited, same electric characteristics are required. More than 40% electric power saving compared with NO MERS systems. 2. Replace mercury lamp with metal halide lamp with MERS metal halide controller. • Approx.

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. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded on November 25, 2008 at 23:44 from IEEE Xplore. Restrictions apply. Authorized. Downloaded on November 25, 2008 at 23:44 from IEEE Xplore. Restrictions apply. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded

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. by changing a switching phase angle of MERS. MERS itself generates voltage and compensates for the inductance voltage unlike a conventional series capacitor, so. value of capacitor voltage V C is 51.3 V. The voltage drop across the synchronous reactance is compensated by this capacitor voltage and the output voltage V dc is

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. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded on November 25, 2008 at 23:56 from IEEE Xplore. Restrictions apply. Authorized. Downloaded on November 25, 2008 at 23:56 from IEEE Xplore. Restrictions apply. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded

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. to capacitor energy. The capacitor discharges the energy to load. (c) Off condition (d) Capacitor energy is discharged S1 S3 turn on 3 Reactance voltage. saved. (in Tokyo) Required electric capacity is decreased about 30%. without MERS with MERS Power factor Active power (W) Apparent power (VA) Current (A) Rective

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. suitable capacitor from (1), high voltage can be generated to the capacitor. The high voltage is applied on the load when S1 and S3 are turned on again, and. the load, and the capacitor voltage grad- ually decreases. When the capacitor voltage becomes zero, cur- rent flows in parallel again. The magnetic energy

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. Restrictions apply. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded on November 25, 2008 at 23:45 from IEEE Xplore. Restrictions apply. Authorized. Downloaded on November 25, 2008 at 23:45 from IEEE Xplore. Restrictions apply. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded

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