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The need for locating the source of disturbance at supplier and customer's point of common connection (PCC) is one of the most important criteria in power quality assessment. Power quality problems like harmonics, asymmetry, voltage dip and fluctuation have a severe impact in term of both technical and economical point of view. Both utilities and customers are becoming more and more interested in...
Compensation of reactive power is one of the most important factors in power system operation. At present, advanced technologies like Flexible AC Transmission System (FACTS) and Flexible AC Distribution System (FACDS) are being introduced in the modern power system to improve power system stability as well as for stable compensation of reactive power. FACTS and FACDS controllers are widely adopted...
Static Var Compensator (SVC) is one of the most popular modern power system elements to stabilize voltage as well as to compensate reactive power demand. There are varieties of such circuit which deal with different technical arrangement, reactive power compensation technique, contribution to power system stability and individual features as well. In this paper simulation and experimental results...
The concept of green and clean energy sources is the major concern for the researchers in the field of renewable and sustainable energy. Fuel cells are considered to be a promising source of electrical power but the stability of the output voltage is a question yet to be answered. In this paper a fuel cell generation model is shown as well as two stability control schemes (DVR and D-STATCOM) have...
With the development of human civilization, energy harvesting from different sustainable energy sources is getting more and more importance. Among various renewable energy resources, wind energy is one of most popular forms of energy. This source of energy can be a good prospect to meet power crisis for a developing country like Bangladesh. Since wind has a random characteristic nature, it is very...
Due to massive increase in prices of fossil fuels as well as alarming rate of environmental pollution, researchers and scientists are paying good number of attentions towards sustainable energy and technology. Among various sources of renewable energy, fuel cell technology is becoming quite popular now a days. A comprehensive analysis of fuel cell generation and stability enhancement has been presented...
In this study, Co doped ZnO thin film were deposited by spray pyrolysis technique at 230°C and annealed at 400°C for 1 hour in N2 atmosphere. Structural characterization techniques were performed by X-Ray Diffraction method. All the undoped and doped samples showed polycrystalline hexagonal wurtzite structure. Variation of lattice parameters, Volume of unit cell and Zn-O bond length were investigated...
In this paper, comparative analysis is done between two phase compensations and wide area control system based PSSs for multi-machine system. The comparison is mainly based on the co-ordination of two cases-different types of fault analysis and variation of loads connected in the system. One and two phase compensation PSSs have been used in this analysis where rotor speed deviation for each machine...
This paper discusses small signal stability analysis of a grid connected fixed speed wind turbine driven induction generator (IG) including series dynamic braking resistor (SDBR). The stator windings of IG are directly connected to a power grid thorough a step-up transformer and transmission line, where SDBR is dynamically inserted in the generation circuit for short time during network disturbance...
This paper presents a comparative study of different IEEE standard excitation systems with and without power system stabilizer (PSS) by examining a case of single machine connected to an infinite bus system. To evaluate the robust behaviour of the PSS, different loading condition is been verified in this study.. Non linear simulation using MATLAB/SIMULINK is applied in this system to show the effect...
This paper presents small signal stability analysis of a doubly fed induction generator (DFIG) based wind farm including series dynamic braking resistor (SDBR) connected at the stator side. A detailed mathematical model of wind turbine, DFIG machine and converters and SDBR is presented in this paper to derive the complete dynamic equations of the studied system. Small signal stability of this system...
This paper presents a co-operative control scheme for a small scale offshore wind and marine current farms composed of variable speed wind turbine driven doubly fed induction generators (DFIGs) and fixed speed squirrel cage induction generators (IGs), respectively. One of the objectives of the proposed scheme is to reduce the overall cost due to the low cost of induction generator. However, induction...
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