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Secure and efficient operation of an electricity transmission system has always been challenging. This has been further complicated by the recent growth in dispersed and intermittent power generation, connected to both transmission and distribution networks, along with the inherent intricacies of a detailed system. To represent this persistently growing vast and complex active distribution network...
As a consequence of the progressive evolution of smart grid functionality, distribution systems are transitioning towards more active network management and are therefore posing significant challenges to the transmission system operators. The conventional approach of planning and operating the transmission and distribution systems, as virtually separate entities with limited coordination, will no...
This paper presents a new load curve methodology based on an enhancement of the Extended Ward equivalent for offline contingency analysis in GB transmission system. The proposed approach maintains the desirable properties of the Extended Ward equivalent method and can update the parameters by exchanging essential operational information between different cardinal points in the demand curve. Different...
The novel technique proposed in this paper is a further enhancement of the Extended Ward Equivalent (EWE) model that does not require any real time data from the external control areas. The proposed technique will enhance LV network equivalent models in order to improve the accuracy of GB power system operational planning. The paper also presents the fault level results as related to the novel network...
In an effort to improve the overall transient stability assessment process, this paper presents an enhancement of the Extended Ward Equivalent (EWE) model combined with a proposed level of signal processing and analysis. Due to the characteristic deviation of elements of the EWE model, the reduced network cannot be fully represented in a suitable form for transient stability studies. By employing...
The UK government has set an ambitious target in the proportion to be generated from renewable sources by 2020 in order to decarbonize the UK electricity. Based on these targets the Electricity Networks Strategy Group (ENSG), developed a "Gone-Green" scenario for the energy mix, which outlines the anticipated rise in generating capacity from wind. The challenge imposed in incorporating this...
A modified version of a quasi-self-complementary antenna, constructed in a leather substrate for ultra wideband applications, is presented in this paper. The proposed antenna, without using a matching circuit, can operate in an ultra-wide 10 dB impedance bandwidth. Featuring a very small and compact size on a leather substrate, this antenna can operate in a specific UWB range for on-body communications...
Now-a-days renewable sources are connected to the main grid which creates bi-directional power flow in the network. These sources can have variable and unpredictable impact on the system which can produce variable outputs. So, real and reactive power becomes variable throughout the hybrid power system. As a consequence the voltage and angle of the system diverges. Thus a faster technique is needed...
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