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When power grid voltage sag occurs simultaneously with some other power quality problems, it will be necessary to install a variety of power quality conditioners. In order to effectively analyze potential interaction resulted from combined operation of the series and shunt compensation devices with no common dc bus. This paper has deeply derived the impedance models of DVR and DSTATCOM, then illustrates...
This paper describes the basic principles of flywheel energy storage technology and flywheel UPS power supply vehicle structure and principle. The Application state in Beijing power grid protection is analysed by portable multi-channel synchronous power quality tester. The test results show Flywheel UPS power supply vehicle has good performance, which can guarantee the power supply continuity of vital...
This article put forward the concept of voltage dip ride through capability test system of electrical equipment, and made the definition and description for the composition, function and application of the test system. We got the voltage dip ride through curve through the experimental study of AC contactor using the test system. The test results show that the voltage dip ride through capability of...
In order to ensure high-reliability and high-security of the power supply for major politic, economic and culture activities, emergency power supply vehicle is often used to provide backup by power companies. Automatic Transfer Switch (ATS) is widely utilized to join the vehicle into power grid. The switching process lasts for a few seconds, during which power supply is shortly interrupted and the...
Solid State Transfer Switch (SSTS) is one of the most economic and effective techniques that can solve the problem powering to sensitive load and critical load uninterruptedly. SSTS uses modern power electronic technology and measurement technology which are based on microprocessor, optical fiber communication and digital signal processing technology to meet the need of power supply. This paper shows...
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