Conference Paper

A STATCOM simulation model to improve voltage sag due to starting of high power induction motor

Dept. of Electr. & Electron. Eng., Putra Malaysia Univ., Selangor, Malaysia
DOI: 10.1109/PECON.2004.1461633 Conference: Power and Energy Conference, 2004. PECon 2004. Proceedings. National
Source: IEEE Xplore


A simulation model of static synchronous compensator (STATCOM) has been constructed on Matlab/Simulink software to examine its capability for voltage sag mitigation due to starting high power induction motor. In this paper, the main structure of Simulink (STATCOM) model is described briefly. Its capability to compensate reactive power to the system when the voltage sag occurs was described. A phase control thyristor (SCR) based voltage source inverter (VSI) is employed for this application. The influences of the initial operation point and DC capacitance are considered. The behavior of this system during voltage sag caused by starting of motor load has been examined. Simulation result shows the fast response and the STATCOM capability for mitigate voltage sag.

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Available from: S. M. Bashi, Oct 04, 2015
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    • "In the past equipments used to control industrial process were mechanical in nature, which were rather tolerant of voltage disturbances. Nowadays , modern industrial equipment typically uses a large amount of electronic components, such as programmable logic controllers (PLCs), adjustable speed drives and optical devices, which can be very sensitive to such voltage disturbances [1]. Among various types of power quality (PQ) disturbances (e.g., interruptions, voltage sags, voltage swells, over voltages, under voltages, transients, voltage unbalance, voltage flicker, and harmonics), voltage sags are the most frequent. "
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    ABSTRACT: Voltage sag can have significant economic consequences for different types of industries. Flexible AC Transmission System (FACTS) is originally developed for transmission networks but similar ideas are now starting to be applied in distribution systems. FACTS devices have become popular as a cost effective solution for the protection of sensitive loads from voltage sag. This paper presents the modeling of FACTS devices to minimize the voltage sag induced financial losses. The overall system financial losses due to voltage sag could be significantly reduced depending on the type of FACTS devices used. The short circuit analysis approach is used to incorporate the effect of these devices on financial losses. Voltage sag produced by balanced and unbalanced short circuits is analyzed by means of an analytical approach using system impedance matrix (ZBus) which incorporates FACTS devices. Two types of FACTS devices, which are most often used in practical applications, are considered in this study: Distribution Static Compensator (D-STATCOM) and Static VAR Compensator (SVC). Case studies based on a real Indian distribution system are used to illustrate the modeling method and the effectiveness of these devices in minimization of financial losses.
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    ABSTRACT: To study and analyze the dynamic performance of the flexible AC transmission system (FACTS) devices, modelling of the FACTS devices is needed. Reactive power compensation is an important issue in the control of electric power systems. Reactive power increases the transmission system losses and reduces the power transmission capability of the transmission lines. Moreover, reactive power transmitted through the transmission lines can cause large amplitude variations in the receiving-end voltage. This paper illustrates the effect of static compensator (STATCOM) in power system on reactive power control by proper modelling of simple power system and voltage source converter based STATCOM (Static compensator) using Simulink and Simpower system toolboxes in MATLAB. The proposed control structure is also verified via state- of- the- art dSPACE software.
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