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A Flexible AC Transmission System (FACTS) device which is Static Synchronous Compensator (STATCOM) is commonly use to overcome voltage instability issue. However, the implementation of the STATCOM may cause a voltage increasement within the allowable limits in all areas and maintain the voltage stability of interconnected system. Therefore, this pa...
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... study in Subsystem Alpha have been done to assess some cases which may lead to voltage drop until exceeding the voltage limit standard used in this study, which is ±5% based on IEEE/ANSI C84.1 which can cause voltage instability of the subsystem [6]. Table 1 shows cases made to see the voltage stability of the subsystem with contingencies study. Case 1 shows the loss of two transmission lines 17-09 and Case 2 shows the loss of two transmission lines 17-16. ...Similar publications
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![Fig. 1. Configuration of STATCOM Controller [13]](profile/Abdulsamad-Jimoh-2/publication/363450176/figure/fig1/AS:11431281083919306@1662900137724/Configuration-of-STATCOM-Controller-13_Q320.jpg)
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... STATCOM is a power electronics voltage source converter employed to inject or absorb reactive power into the electrical grid. It is a member of Flexible AC Transmission System (FACTS) family shunt devices [25]. Figure 4 shows the basic connection of the STATCOM to the electric power grid through step-down transformer which is replaced by its equivalent circuit and as an RL filter. ...
... At steady state Vbus = Vconv and no reactive power (Q) exchange will occur, when the Vbus > Vconv the reactive power (Q) will flow from Bus to the STATCOM (absorption) and when the Vbus < Vconv then the reactive power (Q) will flow from STATCOM to the Bus (injection). The exchanging process can be described by the following equation [25]: ...
In recent decades, multi-level converters have become popular and used in many power systems applications. Compared with conventional converters, multi-level converters contribute to reducing the voltage stress on the switching devices and enhancing the power quality delivered to the load. In this paper, the study of the five-level diode clamped multilevel converter based static synchronous compensator has been accomplished. Model Predictive current control strategy which a type of modern control algorithms was employed for driving the proposed compensator. The suggested five level converter controlled by model predictive current control is firstly examined to verify that this control algorithm is appropriate for achieving the desired performance. Then the proposed converter and control combination is employed and simulated as a static synchronous compensator in distributed power system. Moreover, in order to examine the robustness of this compensator, the load status is suggested to be heavy inductive. Simulation process has been performed using MATLAB – SIMULINK software package. The results show that the implemented configuration (converter and control algorithm) provides high power quality improvement with adequate reactive power compensation.
... In this paper a design of a static synchronous compensator (STATCOM) based on diode clamped multilevel converter DCMC installed on the 11kV, 100MVA distribution system is considered. The exchanging process between the power system and the converter can be described by the following equation [22]: ...
In this paper, a STATCOM based on Five-level Diode Clamped Multilevel Converter is
used to maintain the bus voltage at specific bus bar in a suggested grid under various abnormal
conditions like 2-phase to ground fault, load disturbance and source disturbance. The suggested
grid consists of a single machine, transmission line and loads. The compensation procedure is
carried out and compared between the two suggested control methods, the first method was the
traditional control method using Phase Shifted-PWM controller which is used to improve the
voltage profile. The Second one was the Finite Set-Model Predictive Controller for improving the
voltage profile. The simulation results show that the two methods provided significant
improvements of the bus voltage profile. Moreover, the improvement of voltage profile using FS-
MPC method is less over shoot and attains a steady state better than the conventional PS-PWM
when the system is subjected under many disturbances. The results of the harmonic effect show
low values of total harmonic distortion (THD) of supply voltage and curren
