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Busbar plays an important role in the transmission and distribution network of the electrical power system, and busbar protection is also an indispensable part of the relaying protection. This digest will focus on studying the property of the busbar protection. The basic analyzing approaches are explained and the performance of busbar protection is discussed by the simulation and calculation results...
It has been shown that, with the instantaneous power constraint and joint power allocation, two-way relaying (TWR) outperforms one-way relaying (OWR) in terms of system throughput. However, the conclusion is not clear for the case with the average power constraint and the case with the instantaneous power constraint but separate power allocation. In this paper, we shall first investigate the optimality...
Almost all plants have the experience of ACB's overcurrent relay (OCR) unexpectedly trip event. Each accident will cause a huge production loss. But manufacturers of OCR can't afford the cost-effective solution of problem. The most used solution is to install an additional relay (ex. ABB Relay B) to replace the function of the ACB's OCR or to adopt a new ACB to replace the old one. These two uneconomical...
In this paper, we investigate the performance of a symmetric two-user interference channel with a full-duplex relay (IFRC) from the perspective of diversity-multiplexing tradeoff (DMT). The sources and destinations are all assumed to be equipped with single antenna and the relay is equipped with multiple antennas. We first find a DMT upper bound of the channel by using a channel capacity upper bound...
With the increasing development of wind power, the capacity of wind farms is larger and its impact on grid operation has become more prominent. The fault current that wind farms provide is much different from the traditional synchronous machines. Wind farms in China are mostly centrally connected to power system. The central integration enlarges the impacts on power system. The correct action of the...
In this paper, diversity-multiplexing tradeoff (DMT) of two-user interference channels with source cooperation is studied. A DMT upper bound is derived based on a capacity upper bound. The tightness of the upper bound is evaluated using an achievable DMT derived from a decode-and-forward (DF) based cooperation scheme. We show that in some channel scenarios, the upper bound can be achieved by the DF-based...
Conventional methods of load shedding are too slow, do not effectively calculate the correct amount of load to shed and lack in operating in a coordinated way. This results in either unnecessary or insufficient load reduction. A new technique should be applied that will be fast and optimal relying on slow communication in order for the distribution network to maintain stability and to improve the...
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