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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...
This paper describes a new approach to update network equivalents by exchanging essential operational information between different cardinal points of the demand curve. The purpose of the study is to create an off-line model that has closer agreement with the on-line model of GB system. In order to minimize the setup time for analyzing the network, it needs to be represented with minimum modelling...
The penetration of wind energy in power system is growing dramatically world wide. Consequently, there are some new challenges appeared on power system. Smart demand technology involves new communication technologies to make sure actions can be fast enough to prevent instability situation of generators. Due to the high level of renewable energy in power system, flexible demand becomes a future option...
As a consequence of the fast development of renewable energy sources in the UK, higher transmission capacity will be required to integrate potentially large volumes of wind generation in the future. Also, over the next decade, maintaining the transmission system security and stability will become more difficult. A major increase in the application of HVDC transmission technology and the deployment...
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...
With the increasingly fast large-scale deployment of renewable energy sources in the UK more state-of-the-art transmission system technologies such as Thyristor Controlled Series Compensation (TCSC) and embedded High Voltage DC (HVDC) links will come into operation in the future GB transmission system. These power flow control devices can be utilized in a co-coordinated manner for better stability...
High penetration of wind power is anticipated in order to increase the share of renewable energy sources up to 20% in 2020. Therefore, in the future there will be major changes to the GB generation profile, both in terms of equipment type and geographical location, which will result in the need to transfer large amounts of renewable energy from the north of Scotland to the mainland demand centers...
This study investigates the possibility of using new transmission technologies such as Thyristor Controlled Series Capacitor (TCSC) and embedded High Voltage DC (HVDC) links to increase power transfer capabilities by means of improving the transient stability as well as oscillation damping in a power system. Initially, this paper discusses the need for stability control systems to ensure co-ordinated...
Pulmonary embolism (PE) is a major preventable cause of maternal mortality during pregnancy and accurate diagnosis is essential. Computed tomography pulmonary angiography (CTPA) is a robust diagnostic test in non-pregnant patients with suspected PE. The potential latent carcinogenic effects of CTPA-related breast irradiation mandates careful use of this technique in young women. The aim of this study...
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