Investigation of Distribution System Stability with Incorporation of Capacitor Switching: A Case Study of Monatan 11 Kv Distribution System

Effectiveness of an electrical distribution system depends on the stability of its voltage profile. Several methods such as Static Compensator (SC), Thyristor Controlled Series Compensation (TCSC) and Series Capacitor have been applied for the stability of the system. However, these methods have been characterized by harmonic variation and low efficiency. Therefore, this research paper applied Shunt Switching Capacitor (SSC) on 11 kV distribution system located at Monatan, Ibadan, Oyo State in order to investigate the stability of the system during outages. Hourly data on bus voltage of the system were collected to determine the average bus voltage and voltage drop of the distribution system for stability evaluation using IEEE statutory limits method. Load Flow Model (LFM) of the distribution system was developed with incorporation of Capacitor Switching Compensation (CSC). This was solved using Kirchoff’s Current Law( KCL) analysis to improve the average bus voltage and voltage drop of the distribution system while simulation was done using MATLAB R2015a. The results of the average bus voltage and voltage drop of the distribution system were 10.5  and 4.2 , respectively. The CSC model improved the average bus voltage and voltage drop by 6 % and 33 % respectively. The research showed that incorporating capacitor switching as a compensation technique enhanced the stability of the distribution systems. The research is useful in the planning and optimization of electrical distribution systems. Keywords: Electrical Distribution System, Voltage, Capacitor Switching Compensation, Load Flow Models, Monatan 11 kV Distribution System, Voltage Drop, MATLAB. DOI: 10.7176/NCS/14-02 Publication date:August 31st 202

Application of Shunt Capacitor Compensation Technique on Electrical Power Distribution System: A Review

The performance and quality of service of the electrical power distribution system are one of the utmost issues bothering the power system operator. This matter is important in order to fulfil load demands, which increase significantly. The progress in enhancing the efficiency of the system is plagued by high real power losses and poor voltage profile especially in the conventional radial distribution system. Hence, researchers have adopted a variety of different approaches to solve these problems in electrical power distribution system. One of the techniques employed is installation of shunt capacitor (using Capacitor Switching Compensation). Studies have shown that when Capacitor Switching Compensation is incorporated into the distribution system, the system losses can be minimized by reducing the reactive power component. Capacitor Switching Compensation is a widely used technique in electric power distribution system to improve the power system performance. This study therefore, reviews some of the applications of Capacitor Switching Compensation in electrical distribution system based on voltage and reactive power control. Thus, the usage of Capacitor Switching Compensation help to control the reactive power on a distribution system, maintenance of the flat voltage profile, improve the system efficiency and the stability of the electrical power distribution system. Keywords:Electrical Power Distribution System, Reactive Power, Voltage Control, Capacitor Switching Compensation, System Losses, Load Demand. DOI: 10.7176/ISDE/12-5-03 Publication date:August 31st 202