Current Issue : July - September Volume : 2020 Issue Number : 3 Articles : 5 Articles
This work presents a concise methodology for the calculation of assessment indexes\nregarding the coupling between active and reactive power control observed on distribution level\nconverters. First, the reader is introduced to the concept of power coupling; when, where and how\nit appears in power control of converters. A brief summary of the theory and formulation behind it\nis also included, together with relevant literature.......................
With the deregulation of modern power grids, electricity markets are playing a more and more important role in power grid\noperation and control. However, it is still questionable how the real-time electricity price-based operation affects power grid\nstability. From a complex network perspective, here we investigate the dynamical interactions between price-based frequency\nregulations and physical networks, which results in an interesting finding that a local minimum of network stability occurs when\nthe response strength of generators/consumers to the varying price increases. A case study of the real world-based China Southern\nPower Grid demonstrates the finding and exhibits a feasible approach to network stability enhancement in smart grids. This also\nprovides guidance for potential upgrade and expansion of the current power grids in a cleaner and safer way....
This paper shall explore the dynamics of power transition in full power shift of hydromechanical transmission (HMT) and focus\non the ideal target displacement ratio. An arithmetic two-range HMT is taken as the research object. A mathematical model of\npower transition in full power shift is established, including the hydraulic transmission unit model and the brake torque model\nduring the double brakes overlapping.........................
This work presents a series representation for the mutual inductance of two coaxial pancake coils which remains accurate in nonquasi-\nstatic regime under the hypothesis that the current in the source coil is uniformly distributed. Making use of Gegenbauerâ??s\naddition theorem and a term-by-term analytical integration, the mutual inductance between two generic turns belonging to\ndistinct coils is expressed as a sum of spherical Hankel functions with algebraic coefficients. The accuracy and efficiency of the\nresulting expression is proved through pertinent numerical examples....
The current research paper deals with the worldwide problem of photovoltaic (PV) power forecasting by this innovative\ncontribution in short-term PV power forecasting time horizon based on classification methods and nonlinear autoregressive with\nexogenous input (NARX) neural network model......................
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