Analisa pemasangan Static Synchronous Series Compensator untuk meperbaiki profil tegangan menggunakan Software PSCAD/EMTDC Power Simulation pada saluran distribusi 20 kv G.I. sambutan KAltim

Membahas performa Static Synchronous Series Compensator (SSSC) dengan adanya jatuh tegangan berupa voltage tags yang terjadi pada saluran distribusi Static Synchronous Series Compensator digunakan bertujuan untuk mereduksi voltage sags sehingga pengiriman tegangan dari penyedia kepada konsumen sesuai dengan yang di harapkan. kata kunci: Static Synchronous Series Compensato

Torsional Interaction Studies on a Power System Compensated by SSSC and Fixed Capacitor

In this paper, a static synchronous series compensator (SSSC), along with a fixed capacitor, is used to avoid torsional mode instability in a series compensated transmission system. A 48-step harmonic neutralized inverter is used for the realization of the SSSC. The system under consideration is the IEEE first benchmark model on SSR analysis. The system stability is studied both through eigenvalue analysis and EMTDC/PSCAD simulation studies. It is shown that the combination of the SSSC and the fixed capacitor improves the synchronizing power coefficient. The presence of the fixed capacitor ensures increased damping of small signal oscillations. At higher levels of fixed capacitor compensation, a damping controller is required to stabilize the torsional modes of SSR

Static Synchronous Series Compensator (SSSC) with low harmonic inverter.

Static Synchronous Series Compensator (SSSC) is one of the two converters of the Unified Power Flow Controller (UPFC). It provides the main function of UPFC in controlling the amount and direction of power flow in the transmission lines by varying the additional voltage magnitude, Δv and additional voltage phase shift, Φ. In this worlç the SSSC has been constructed using 3-level Neutral-Point-Clamped (NPC) structure in order to reduce the harmonics. The effect of the variation of additional voltage magnitude, Δv and additional voltage phase shift, Δ to the sending end voltage, V2 has been investigated. From the results obtained from simulation and laboratory models, a small THD of less of 2% has been obtained

Performance Studies of Static Synchronous Compensator and Static Synchronous Series Compensator Modes for Convertible Static Compensator

This thesis presents an overview of the emerging Flexible AC Transmission System (FACTS) and Convertible Static Compensator (CSC) technologies. CSC, the flexible multifunctional compensator is an innovation fi-om FACTS technology. These technologies are fully utilized the existing transmission system assets, that improve transmission nationality for economical and environmental reasons. The CSC can occupy as shunt and/or series compensation devices providing various modes. The CSC can operate in 11 different configurations depending on control objectives, for voltage control at bus system as well as power flow control on two existing transmission lines. The CSC can function as a Static Synchronous Compensator (STATCOM), Static Synchronous Series Compensator (SSSC), Unified Power Flow Controller (UPFC) and Interline Power Flow Controller (IPFC). This research work focused on STATCOM and SSSC for CSC as shunt and series controller, respectively. The basic operation of the controllers is explained, together with the circuit configurations and general control strategies. The STATCOM and SSSC are based on a voltage-sourced converter (VSC) which consist of Gate Turn- Off (GTO) Thyristor as the switching devices, are used in this research work to study the performance of the controllers. An 11-bus system as the test system is used throughout the study to verifL the proposed models and its control strategies. The model of the controllers and its control are then validated through PSCAD/EMTDC simulation. Steady-state analysis is done to demonstrate the capability of the controllers designed for improving voltage regulation and power flows in the transmission systems. The result obtained from the simulations clearly showed that the designed STATCOM and SSSC controllers are capable in regulating voltage and increased the transmitting powe

Enhancement of a Power System Transient Stability Using Static Synchronous Series Compensator SSSC

Static Synchronous Series Compensator (SSSC) is a well known device for effectively regulating the active power flow in a power system. In this paper, the SSSC linearized power flow equations are incorporated into Newton-Raphson algorithm in a MATLAB written program to investigate the control of active poweer flow and the transient stability of a five bus and a thirty bus IEEE test systems, during abnormal conduction (three phase fault near buses). A comparison of the results obtained for the base case without SSSC and with it to investigate the effectiveness of the device on both of the active power flow and the transient stability

Static shunt and series compensations of an SMIB system using flying capacitor multilevel inverter

The flying capacitor multilevel inverter (FCMLI) is a multiple voltage level inverter topology intended for high-power and high-voltage operations at low distortion. It uses capacitors, called flying capacitors, to clamp the voltage across the power semiconductor devices. A method for controlling the FCMLI is proposed which ensures that the flying capacitor voltages remain nearly constant using the preferential charging and discharging of these capacitors. A static synchronous compensator (STATCOM) and a static synchronous series compensator (SSSC) based on five-level flying capacitor inverters are proposed. Control schemes for both the FACTS controllers are developed and verified in terms of voltage control, power flow control, and power oscillation damping when installed in a single-machine infinite bus (SMIB) system. Simulation studies are performed using PSCAD/EMTDC to validate the efficacy of the control scheme and the FCMLI-based flexible alternating current transmission system (FACTS) controllers

The role of distributed generation on the performance of electrical radial distribution network

Purpose: This article provides available information on the role of distributed generation (DG) in the performance of a power distribution network.Design/methodology/approach: The study reviewed articles about available methods for reducing technical losses in electrical distribution networks. The second step involved studying various researchers' views on renewable energy in some developing countries for introducing DG into a distribution network. The influence of DG on the economic performance of a distribution network. Finally, the study scouted for available information on the implementation of a demand response (DR) program on the performance of a distribution network in the presence of DG.Findings: Available information reveals that the reliability of DG for reducing the technical losses in a distribution network is higher than relying on alternating current controllers. There are indications of renewable energies in developing countries for introducing DG into a distribution network. According to the articles reviewed, the approach for the optimal location of DG did not include the combination of the voltage stability index and power loss reduction index. It is also worth considering using the power system analysis toolbox (PSAT) for DG sitting. The economic influence of DG on a distribution network's performance has not been evaluated based on the technical loss, generation cost, emission cost and reliability. It is also worth considering the benefits of demand response programs in the presence of DG.Research limitation: The review concentrated mainly on DG's influence in reducing technical loss. Articles relating to the effect of DG on other distribution network technical issues such as voltage stability, harmonics etc. also require attentionPractical implications: Distribution network performance is essential for the operation of electrical gadgets. Therefore, improved distribution network performance will result in the economic development of a country.Originality/Value: This paper provides the platform that stimulates interest in using DG to improve the distribution network performance

Optimal Parameters of Static Synchronous Series Compensator (SSSC) Connected to a Power System

The objective of this project is to develop a Static Synchronous Series Compensator (SSSC) controller with the purpose to control the power flow in the transmission lines. The optimal parameters of this controller are sized using an optimization technique so that the transmission line losses can be minimized. SSSC is a part of Flexible AC Transmission System (FACTS) technology that has the ability to control the interrelated parameters that govern the operation of transmission systems. The optimization of the parameters of SSSC is formed as an optimization problem with the objective of minimizing the transmission loss in the power system network. Particle Swarm Optimization (PSO) technique is used to solve the problem and the Newton-Raphson method for power flow is modified to consider the insertion of SSSC in the network. The proposed method is applied using MATLAB and tested on IEEE 14-bus system to observe the voltage profile and the transmission loss of the power system network. This report also covers basic principles and operation of SSSC, the power flow model and PSO technique. The result and outcome of the project are included as well as the recommendation for future work

A Fault-Tolerant P-Q Decoupled Control Scheme for Static Synchronous Series Compensator

Control of nonlinear devices in power systems relies on the availability and the quality of sensor measurements. Measurements can be corrupted or interrupted due to sensor failure, broken or bad connections, bad communication, or malfunction of some hardware or software (referred to as missing sensor measurements in this paper). This paper proposes a fault-tolerant control scheme (FTCS) for a static synchronous series compensator (SSSC). This FTCS consists of a sensor evaluation and (missing sensor) restoration scheme (SERS) cascaded with a P-Q decoupled control scheme (PQDC). It is able to provide effective control to the SSSC when single or multiple crucial sensor measurements are unavailable. Simulation studies are carried out to examine the validity of the proposed FTCS. During the simulations, single and multiple phase current sensors are assumed to be missing, respectively. Results show that the SERS restores the missing data correctly during steady and transient states, including small and large disturbances, and unbalanced three-phase operation. Thus, the FTCS continuously provides effective control to the SSSC with and without missing sensor measurements