نتایج جستجو برای: deregulated environment

تعداد نتایج: 523730  

2002
Thomas F. Brady

The electric utility industry has undergone fundamental change in the last decade. Foremost of these changes have been numerous deregulation attempts. Producers and large consumers have built business models based upon large volume transactions, which lead to smooth production and volume discounting. The risks associated with using these traditional business models in deregulated markets are ma...

2003
Tony B. Nguyen

In the deregulated environment of power systems, the transmission networks are often operated close to their maximum capacity to achieve transfer of power. Besides, the operators must operate the system to satisfy its dynamic stability constraints under credible contingencies. This paper provides a method using trajectory sensitivity to reschedule power generation to ensure system stability for...

2013
P. Priyadharshini

Under new de-regulated environment an open access to transmission system seems to be desired. Determination and enhancement of available transfer capability (ATC) are important issues in deregulated operation of power systems. This paper focuses on the best location and optimal allocation of FACTS devices to improve maximum available transfer capacity (ATC). ATC is computed using repeated power...

Journal: :The Journal of biological chemistry 2009
Wing-Kin Sung Yiwei Lu Charlie W H Lee Dongwei Zhang Mostafa Ronaghi Caroline G L Lee

The hepatitis B-X (HBx) protein is strongly associated with hepatocellular carcinoma. It is implicated not to directly cause cancer but to play a role in hepatocellular carcinoma as a co-factor. The oncogenic potential of HBx primarily lies in its interaction with transcriptional regulators resulting in aberrant gene expression and deregulated cellular pathways. Utilizing ultraviolet irradiatio...

2014
Maruthi Prasanna

In the present deregulated environment, optimal placement of Distributed Generation (DG) and shunt capacitor in the distribution network plays a vital role in distribution system planning. In this paper, an analytical approach for optimal placement of combined DG and Capacitor units are determined with the objective of power loss reduction and voltage profile improvement. Firstly, the DG unit i...

2012
K. VENKATESWARLU CH. SAI

Improving ATC is important in the current deregulated environment of power systems. In this paper, ATC is computed using Continuous Power Flow (CPF) method considering line thermal limit and bus voltage limits. Flexible Alternating Current Transmission system (FACTS) can control magnitude of voltage, phase angle and circuit reactance and the load flow may be re-distributed to regulate bus volta...

2012
Saran Satsangi Ashish Saini Amit Saraswat

In this paper, a new K-means clustering based approach for identification of voltage control areas is developed. Voltage control areas are important for efficient reactive power management in power systems operating under deregulated environment. Although, voltage control areas are formed using conventional hierarchical clustering based method, but the present paper investigate the capability o...

2013
Ashwani Kumar

In this paper, an optimal power flow based approach has been applied for multi-transactions deregulated environment for ATC determination with SVC and STATCOM. The main contribution of the paper is (i) OPF based approach for evaluation of ATC with multi-transactions, (ii) ATC enhancement with FACTS devices viz. SVC and STATCOM for intact and line contingency cases, (iii) Impact of ZIP load on A...

2014
Apostolos Zaravinos George I. Lambrou Nikos Mourmouras Patroklos Katafygiotis Gregory Papagregoriou Krinio Giannikou Dimitris Delakas Constantinos Deltas

BACKGROUND Upper tract urothelial carcinomas (UT-UC) can invade the pelvicalyceal system making differential diagnosis of the various histologically distinct renal cell carcinoma (RCC) subtypes and UT-UC, difficult. Correct diagnosis is critical for determining appropriate surgery and post-surgical treatments. We aimed to identify microRNA (miRNA) signatures that can accurately distinguish the ...

2016
K. Afshar M. Fotuhi-Firuzabad N. Amjady

In this paper, a new formulation for clearing reserve market in a deregulated environment with separated energy and reserve market is introduced. In the proposed method, reserve market is cleared such that the costs associated with capacity reservation, producing energy in real-time, opportunity cost of those units which are accepted in the energy market and backed down from the accepted values...

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