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This paper proposes a novel nonlinear multi-loop control method for the coordinated control of the Unified Power Flow Controller (UPFC) using high gain state and perturbation observers (HGSPO). The UPFC is decoupled into four independent subsystems. The optimal output feedback control of each subsystem is achieved with the estimates of states and perturbations obtained by the HGSPO. A four-loop nonlinear...
In order to validate the lifetime of long-life product, the concept of lifetime demonstration testing (LDT) based on degradation is presented in this paper. For shortening test time as far as possible, the prior information of similar products is considered. Therefore, a framework of Bayesian lifetime demonstration based on degradation is developed by considering the prior information of products...
The issue on reliability of the device becomes more critical as power density of device progressively increases with advancement of technology nodes. Smaller transistor and hence thinner gate oxide implies transistors are more vulnerable against an Electrostatic Discharge (ESD) event. Among the test models in ESD, Charged Device Model (CDM) has greater potential to cause catastrophic damage to the...
This paper is devoted to the experimental investigation of GaInSn current limiter based on a novel principle, which mainly takes advantage of the gas pressure in the liquid metal when arcing. According to this principle, an U-shape sliding part is designed and pushed upward under the gas pressure, which subsequently squeezes the arc into a narrow slot. Firstly, a specially designed setup is employed...
The testing of a controller for a proposed 10 MVA STATCOM through hardware-in-the-loop experimentation is described in this paper. The electrical environment into which the STATCOM is to be inserted, including a significant portion of the utility network and a nearby wind farm are simulated using a large-scale digital real time electromagnetic transients simulator. The STATCOM controller is interfaced...
The advances of semiconductor technology are highly dependent on the advances of polymeric materials. These include the use of polymers as adhesives (both conductive and nonconductive), interlayer dielectrics (low-k, low loss dielectrics), encapsulants (discrete and wafer level packaging), embedded passives (high-k and high-Q materials), superhydrophobic selfcleaning lotus effect surfaces, etc. In...
Distributed generation can have an impact on distribution feeder voltage regulation, and distributed solar photovoltaics (PV) are no exception. As the penetration level of solar PV rises over the coming decades, reverse power flow on the distribution feeder will happen more frequently and the associated voltage rise might lead to violations of voltage boundaries defined by ANSI C84.1. The severity...
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