1,022 research outputs found
Rationalizing migration decisions: Labour migrants in East and South-East Asia
No full textExamining how migrants go about making the decision to migrate and how they rationalize their decision post-migration, this book draws on an innovative blend of statistical analysis and interviews with Bangladeshi migrant workers in Hong Kong and Malaysia. © AKM Ahsan Ullah 2010. All rights reserved.https://fount.aucegypt.edu/faculty_books/1035/thumbnail.jp
Ahsan Ullah, Akm, Refugee Politics in the Middle East and North Africa. Human Rights, Safety, and Identity, New York, Palgrave Macmillan, 2014, 232p.
No full textAKM Ahsan Ullah provides an insightful analysis of migration and displacement in the Middle East and North Africa. He examines the intricate relationship of these phenomena with human rights, safety concerns, and issues of identity crisis and identity formation. Engaging in a wide range of current debates including the Arab Uprising and regional and international responses to refugee movements, this book will enrich the present understanding of migration and refugee rights. Voir sur le site d..
Forman Christian College Magazine
No full textEditorial. pp. 1-2; Katju, J. L.-Poetry-A Song. pp. 3; Jain, M. P.-Article-Man and Woman in Hardy's ""Tess"". pp. 4-6; Parmanand, A.-Studentium Amorate. pp. 6-8; Banerji, E. H.-Article-The Past and Present of Co-operation in India. pp. 8-14; An Indian Day. pp. 14-17; Mirza, M. A.-Essay-Boxing-its Science. pp. 17-20; Mumtaz Hassan Ahsan-Article-The Art of Turgenev. pp. 20-25; Patrick, B. N.-Falling in Love. pp. 25-26; Mahesh, P. M.-Article-Banking in India. pp. 26-31; Parmanand, A.-News and Notes. pp. 31-33; Ata Ullah Kalim-Hostel News. pp. 33-34; Ata Ullah Kalim-Irani Shairon ke Dilchasp Waqiat. pp. 35-36; Vernacular Articles. [Hindi] 14 p. [Urdu]. 32 p
Line Congestion Management in Modern Power Systems: A Case Study of Pakistan
Get PDFThe surging electricity demand in Pakistan has led to frequent blackouts, prompting government initiatives to expand power plant capacities and improve the national grid. The government prioritizes integrating large-scale renewable energy sources, such as wind and solar power, to reduce dependence on conventional power plants. However, the intermittency of renewables leads to forecasting errors, requiring extra power reserves from conventional units, thereby escalating operational costs and CO2 emissions. The country currently utilizes a manual mechanism for power balancing operations, overlooking critical grid constraints of the transmission line loadings. In such conditions, injecting large-scale power from renewables can lead to significant fluctuations in line power flows, risking transmission line loadings and compromising the system's secure operation. Hence, this paper has developed an automatic generation control (AGC) model for the highly wind-integrated power system to alleviate line congestions in the network and enhance the economic operation of the system. The study utilizes the Pakistan power system as a case study to simulate the proposed model. The developed real-time power dispatch strategy for the AGC system considers the constraints of the transmission line to avoid congestion. It integrates wind energy as operating reserves to enhance the economic operation of the system. When managing line congestion, it identifies overloaded bus lines and adjusts power regulation accordingly while compensating for shortfalls by augmenting transmitted power from regional grid stations. However, it maintains a constant dispatch ratio without line overloads, aligned with generation capacities. Additionally, the strategy integrates reserve power from the wind power plant and traditional generating units to further improve economic operations. Simulations have been conducted using PowerFactory software, employing the eight-bus and five-machine models to replicate the characteristics of the Pakistan power system. The results demonstrate the effectiveness of the proposed AGC design in mitigating transmission line congestion of power systems that are heavily integrated with wind energy sources while simultaneously ensuring the economic operation of generating units
Control Strategies for Electric Vehicle Drives: FOC Implementation with MTPA and Field Weakening
No full text
Ancillary services from wind and solar energy in modern power grids: A comprehensive review and simulation study
Get PDFRenewable energy sources like wind and solar have increased demand for surplus power capacity. The demand is primarily fueled by the growing impact of forecasting errors associated with these intermittent energy sources. Implementing advanced control methods for automatic generation control (AGC) is essential to integrate wind and solar power with conventional generation sources to balance the power system and reduce reliance on traditional reserves. Therefore, this paper comprehensively overviews solar and wind energy integration in the AGC framework to provide optimal grid ancillary services. Initially, the paper presents an overview of the basic equations used to integrate reserve power from the photovoltaic (PV) system by employing the de-loading strategy. Subsequently, a comprehensive review is conducted on integrating the PV system in AGC strategies to provide grid ancillary services. The study also analyzes the contribution of wind power in AGC services using relevant equations and past practices. The paper presents a real-time dynamic control strategy to optimize the dispatch of the AGC unit by integrating the operating reserves from wind energy systems in conjunction with thermal power systems. The study simulates an 8-bus, 5-machine model using the Dig-SILENT Power Factory. The findings reveal that utilizing operating reserves from wind power can significantly reduce large-scale forecasting errors in massively renewable energy resources (RES) integrated power systems, thereby ensuring the necessary system operational security and reducing the reliance on traditional generating units
Finite sample econometrics / Aman Ullah.
No full texteconomic&political bookfair2015Includes bibliographical references (p. 199-225) and index.x, 230 pages
- …
