Transient Stability Enhancement of a Power System Using STATCOM Based on Particle Swarm Optimization Case Study: IEEE 30-bus test system integrated into Adama II Wind Farm

Abstract

A transmission system is a network of inter-connected lines that makes it possible to transport large amounts of electricity from a generation station to a substation. Power system transient stability is a critical aspect in ensuring reliable and secure power system operation. FACTS devices, such as STATCOM, have proven to be effective in enhancing power system transient stability. These devices have the capability to control power flow in the network, resulting in increased system load capacity, reduced flow in heavily loaded lines, lower system losses, and improved system security. STATCOM controllers are integrated into existing approaches to ad- dress these issues, but they are sized and placed incorrectly, which could result in a negligible reduction in magnitude of voltage deviations and transmission network losses. Hence, the pur- pose of this research is to minimize transmission network losses, transient instability and volt- age magnitude variation in the transmission network by appropriately allocating the STATCOM controller through the use of PSO. After optimization, the results indicated that bus 05 with the injection of 39.93 MVAr of shunt reactive power with PSO had the best STATCOM controller positions in the test system. At steady state, the network under consideration’s total active power loss was 9.003 MW, while the STATCOM controller optimized using PSO was 8.4173 MW, cor- respond to 6.5% total active power loss reduction. In accordance, the total reactive power loss was 32.6309 MVAr and 30.2954 MVAr, respectively, correspond to 7.157% total reactive power loss reduction. Further analysis is done on the impact of the compensation device STATCOM in the areas of transient stability improvement, loss reduction, damped oscillation in power system, and voltage profile support of a case study involving the incorporation of wind farm Adama II into IEEE 30-bus modified test systems using MATLAB/PSAT has been implemented. The results are compared to the impact in the absence of STATCOM under faulty conditions. The overall test systems with STATCOM placement have significantly improved transient stability, damped the multiple-machine system oscillations, and shortened the transient period of the oscillations.