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With the development of the smart meters, demand response (DR) is able to provide fast ancillary services, such as frequency control. Some recent studies demonstrated that DR can perform like thermal generators in the frequency control. However, little attention has been paid to DR's effect on the electromechanical oscillations of the power system. Fast-response DR can not only affect system frequency,...
This paper discusses the control strategy of DC-capacitor voltage in single-phase STATCOM with drastically reduced capacitance. Reduced capacitance results in a high amplitude of the capacitor voltage oscillation; therefore, the peak voltage control is important to keep the dimensional size of the capacitor compact. A good dynamic peak voltage estimation method has been proposed for the control. This...
This paper discusses the design and control of a single-phase STATCOM with reduced dc capacitance. It is first demonstrated how operation with reduced dc capacitance and large dc voltage oscillations can be possible without increasing the maximum dc voltage, as long as only operation for reactive power injection is required. Then, a method for dc peak voltage control is proposed, based on adaptive...
We report an abnormal waveguiding phenomenon that the fundamental mode guided in strip waveguides of a special Ti-diffused waveguide structure, in which an array of 4- and 6--wide strip waveguides is embedded in a planar waveguide, nonperiodically oscillates with the wavelength along the waveguide width direction. The oscillation amplitude reaches 2 . The...
This article designed an improving high voltage discharging ozone generating system. By analyzing the disadvantages of the present high voltage discharging ozone generating systems, we elastically designed a discharging system with double power supply module, matching the low-power oscillating circuit, the transformers with low circle number and voltage-multiplying rectification circuit, and assisted...
This article presented a Gunn oscillator with plane substrate circle cavity. A 2-port model is present to determine both the oscillating frequency and output circuit. This oscillator is working in its third oscillating mode which provides a output power about 15.0dBm and the phase noise about -85dB at offset 100KHz.
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