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Volume 7, Issue 3 2006 Article 5 International Journal of Emerging Electric Power Systems Novel STATCOM Controllers for Voltage Stabilization of Stand Alone Hybrid (Wind/ Small Hydro) Schemes Mohamed S. ElMoursi, McGill University Adel M. Sharaf, University of New Brunswick Recommended Citation: ElMoursi, Mohamed S. and Sharaf, Adel M. (2006) "Novel STATCOM Controllers for Voltage Stabilization of Stand Alone Hybrid (Wind/Small Hydro) Schemes," International Journal of Emerging Electric Power Systems: Vol. 7: Iss. 3, Article 5. DOI: 10.2202/1553-779X.1342 Novel

Abstract

In this paper Static Synchronous Compensator (STATCOM) is used for improving the performance of the power grid with wind turbine that drives synchronous generator. The main feature of the STATCOM is that it has the ability to absorb or inject rapidly reactive power to grid. Therefore the voltage regulation of the power grid with STATCOM device is achieved. STATCOM also improves the stability of the power system after occurring severe disturbance such as faults, or suddenly step change in wind speed. The proposed STATCOM controller is a Proportional-Integral (PI) controller tuned by Genetic Algorithm (GA). An experimental model was built in Helwan University to the proposed system. The system is tested at different operating conditions. The experimental results prove the effectiveness of the proposed STATCOM controller in damping the power system oscillations and restoring the power system voltage and stability.

distributed generation resources near the load centers. The connection of distributed generation to the distribution grid may influence the stability of the power system, i.e. angle, frequency and voltage stability. It might also have an impact on the protection selectivity, and the frequency and voltage control in the system. This paper presents a low cost FACTS based Dynamic Distribution System Compensator (DDSC) scheme for voltage stabilization and power transfer and quality enhancement of the distribution feeders connected to a dispersed wind generator, using MATLAB

Abstract

In this note the ratio of the second to the first order reflection is determined for the KAP and PbSt crystals, for wavelengths corresponding to the Al K-line emission. The source of the radiation was a low-voltage stabilized X-ray tube. The X-rays were detected with a Bragg spectrometer equipped with a proportional counter detector. The signal measured by the proportional counter was subsequently pulse height analyzed.

Abstract

Development of smart grids for power supply to rural consumers assumes the creation of adaptive voltage regulation systems in 0.38 … 10 kV electrical networks as one of the directions. This paper considers a new approach to create an algorithm for controlling the technical means of regulation and voltage stabilization. The proposed adaptive voltage regulation system allows collecting and processing information on the actual voltage at the consumer inputs and automatically determine the voltage regulation coefficient. The developed mathematical model allows calculating the voltage regulation coefficient depending on the voltage at various points of the 0.38 kV electric network. In the paper there are also new methods of adaptive automatic voltage regulation in the 0.38 kV electrical networks and the requirements to the functional capabilities of this system. The article suggests technical solutions for the implementation of adaptive automatic voltage regulation system. The successful tests of experimental model of this system have been carried out.

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Voltage Stabilization of a Variable Speed Wind Turbine Driving Synchronous Generator using STATCOM based on Genetic Algorithm 541 Helmy M. El-Zoghby and Ahmed F. Bendary A Novel Technique for Maximum Power Point Tracking of a Photovoltaic Based on Sensing of Array Current Using Adaptive Neuro-Fuzzy Inference System (ANFIS) 547 H. E. Keshta, A. A. Ali, E. M. Saied and F. M. Bendary Application of Static Var Compensator (SVC) With PI Controller for Grid Integration of Wind Farm Using Harmony Search 555 Rafael Cisneros, Rui Gao, Romeo Ortega and Iqbal Husain PI Passivity

and arouses great interest from the society [2]. However, increased penetration of dispersed and distributed wind energy creates a new serious uncontrollable scenario in electric power grid system. On one hand, dynamic variations and wind velocity excursions cause excessive changes in prime mover power and the corresponding electrical power injected into the grid utility network. Depending on intensity and rate of wind changes, difficulties with generator output frequency variations and severe generator voltage stabilization could result in possible loss of

order ODE 112 semiconductor 177 Semiconductor 3 Shannon-Nyquist criterion 155 short circuit 26 SMD 191 source 15, 192 SPICE 199 supercap 97 superposition 65 switching 102 THD 191 Thevenin’s equivalent 70 underdamped case 117, 123 unity gain buffer 88 valence band 2, 3 vector diagram 129 voltage 8 voltage divider 38 voltage source 16 voltage stabilization 184 voltmeter 43 wafer 177 Wheatstone bridge 23, 147 Wye-Delta transformation 41 Zener diode 180, 184

diagram of the experimental set-up consisted of heat supply system, heat pipe unit, data acquisition and monitoring system. Heat supply system includes voltage-stabilized power source, i.e., two 180×50×5 mm electric heating plates, each with 108 Ω of electrical resistance and 500 W of the highest output power. The two plates, insulated with multi-layers of asbestos cloth, face and cling to the exterior of the heating section of the pipe with their lengthwise direction vertical to the crosswise direction of the heat pipe. Total of twelve temperature monitoring