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Steady State Control Enhancement and Power Flow Analysis of Longitudinal Power Systems Incorporating Interline Power Flow Controller
Olaniyi Isaiah Opeyemi,
Adepoju Gafari Abiola,
Babatunde Olukotun
Issue:
Volume 6, Issue 4, July 2017
Pages:
27-42
Received:
1 April 2017
Accepted:
12 May 2017
Published:
12 July 2017
Abstract: Transmission lines operating in steady state are prone to several challenges such as; poor steady-state power flow control, active and reactive power loss and voltage limit violations. These challenges can be solved either by the use of Flexible Alternating Current Transmission System (FACTS) controllers such as Interline Power Flow Controller (IPFC) and Generalized Unified Power Flow Controller (GUPFC) or other non-economical means such as building additional generation and transmission facilities. Previous works have incorporated IPFC to solve the challenges in meshed transmission system but has not been applied to solve the inherent challenges of the longitudinal Nigerian transmission system operating in steady state. This work performs power flow analysis with the incorporation of IPFC into the Nigerian 330-kV, 28-bus transmission system to solve its steady state challenges. Steady state power system component model produces a set of algebraic equations while the steady state IPFC model in rectangular form produces another set of algebraic equations for power flow analysis. The sets of equations were solved simultaneously using Newton-Raphson numerical iteration method, due to its fast quadratic convergence and high efficiency. Newton-Raphson power flow algorithm was implemented using MATLAB 8.1.0.604 (version R2013b) and the analysis was performed without and with the incorporation of IPFC data into the Institute of Electrical and Electronic Engineers (IEEE) 14-bus and the Transmission Company of Nigeria (TCN) 330-kV, 28-bus system. The performance evaluation of IPFC was investigated using active and reactive power as performance variables. The incorporation of IPFC rectangular model into the Nigerian 330-kV, 28-Bus TCN and IEEE 14-bus system demonstrated the capability of IPFC to control active and reactive power flow. IPFC typifies effective enhancement and the maximum use of Nigerian 330-kV, 28-Bus TCN and IEEE 14-bus transmission infrastructure for better delivery of electrical power to the end users.
Abstract: Transmission lines operating in steady state are prone to several challenges such as; poor steady-state power flow control, active and reactive power loss and voltage limit violations. These challenges can be solved either by the use of Flexible Alternating Current Transmission System (FACTS) controllers such as Interline Power Flow Controller (IPF...
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Review on S-Shape Characteristics of Pump Turbine for Hydropower Generation
Daniel Adu,
Jinfeng Zhang,
Yujian Fang
Issue:
Volume 6, Issue 4, July 2017
Pages:
43-50
Received:
23 May 2017
Accepted:
26 June 2017
Published:
26 July 2017
Abstract: This paper presents and discussed the results of an experimental investigation of S-shape characteristics of pump turbine. An experimental study of pump turbine has been carried out by many researchers to study its characteristics. By using the experimental results of tested pump of some previous researchers, The Numerical analysis and Experimental studies on the S-shaped characteristics of a pump turbine model, Impact of Parameters on S-shaped characteristics, mechanism of the internal flow of pump turbines as well as measurements of pressure fluctuations on reduced-scale model pump-turbines have been discussed.
Abstract: This paper presents and discussed the results of an experimental investigation of S-shape characteristics of pump turbine. An experimental study of pump turbine has been carried out by many researchers to study its characteristics. By using the experimental results of tested pump of some previous researchers, The Numerical analysis and Experimental...
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Research on Value Sharing Model of Energy Service Industry Value Network
Dong Jun,
Lv Shanlei,
Xie Shiyan,
Dou Xihao
Issue:
Volume 6, Issue 4, July 2017
Pages:
51-56
Received:
25 June 2017
Accepted:
10 July 2017
Published:
31 July 2017
Abstract: Energy service industry is a complex network system and a promising industry involving multi-subject, multi-product, multi-technology and multi-value. In this network, all the value network participators are correlative and the value appreciation constitutes value network. Value network is a new effective form of management for the industrial value chain, which can increase the added value of the value network. In the value network of the energy service industry, analyzing the relationship among those participators can help to solve the distribution problem and create more value. This paper built the value sharing model with energy service companies as the object. Then analyzed the relevant factors through fuzzy comprehensive evaluation method and analytic hierarchy process method. The example confirmed the feasibility and validity of the model.
Abstract: Energy service industry is a complex network system and a promising industry involving multi-subject, multi-product, multi-technology and multi-value. In this network, all the value network participators are correlative and the value appreciation constitutes value network. Value network is a new effective form of management for the industrial value...
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A New Approach to LCL Filter Design for Grid-Connected PV Sources
Mohammad Amin Chitsazan,
Andrzej M. Trzynadlowski
Issue:
Volume 6, Issue 4, July 2017
Pages:
57-63
Received:
1 July 2017
Accepted:
10 July 2017
Published:
31 July 2017
Abstract: Power converters have been widely employed in power systems to enhance the quality and magnitude of the power drawn from renewable energy sources. An LCL filter for connection of an inverter to the grid is often used to mitigate the harmonics generated by the inverter. Based on different design methodologies, optimal parameters of LCL filters tend to vary in wide ranges. This paper describes a new approach to an LCL filter used for minimizing the harmonic currents. A phase shifting transformer is inserted into the structure of an LCL filter to minimize the harmonic current. The procedures and techniques described in this paper are particularly suited for the grid-connected photovoltaic energy systems.
Abstract: Power converters have been widely employed in power systems to enhance the quality and magnitude of the power drawn from renewable energy sources. An LCL filter for connection of an inverter to the grid is often used to mitigate the harmonics generated by the inverter. Based on different design methodologies, optimal parameters of LCL filters tend ...
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