Review on load frequency control for power system stability

Muhammad Nizam Kamarudin, Nabilah Shaharudin, Noor Haqkimi Abd Rahman, Mohd Hendra Hairi, Sahazati Md. Rozali, Tole Sutikno
2021 TELKOMNIKA (Telecommunication Computing Electronics and Control)  
Power system stability is the capability of power systems to maintain load magnitude within specified limits under steady state conditions in electrical power transmission. In modern days, the electrical power systems have grown in terms of complexity due to increasing interconnected power line exchange. For that, an inherent of controllers were essential to correct the deviation in the presence of external disturbances. This paper hence aims to review the basic concepts of power system
more » ... y in load frequency control. Various control techniques were analyzed and presented. Power system stability can be classified in terms of method to improve power system stability, which are rotor angle stability, frequency stability and voltage stability. It is found that each method has different purpose and focus on solving different types of problem occurred. It is hoped that this study can contribute to clarify the different types of power system stability in terms of where it occurs, and which is the best method based on different situation. Keywords: Load frequency control Power line exchange Power system stability Power transmission Rotor angle stability Voltage stability This is an open access article under the CC BY-SA license.  Review on load frequency control for power system stability (Muhammad Nizam Kamarudin) 639 several types of control that were introduced [3-10]. However, research has consistently shown that previous control methods are lack of robustness towards the uncertainty's parameter. Therefore, objective of this paper is to review a few conventional methods and presenting the research gaps and new research directions in LFC. CONCEPTS OF POWER SYSTEM STABILTY Stability in power system defines the ability of the system to regain a state of operating equilibrium after being injected by disturbances. In power system, all variables are bounded. As such, the entire system remains intact [1, 2] and interconnected. The type of disturbances are faults, load changes, generator outrage, and line outrage or voltage collapse. Plus, the source of disturbances can be the combination of all. As depicted in Figure 1 , power system stability can be classified into rotor angle, voltage stability and frequency stability [2] . Each of these three stabilities can be further classified into large disturbance or small disturbance, as well as short term or long term stability issues.
doi:10.12928/telkomnika.v19i2.16118 fatcat:5katfdc73zg2lhzuyj5uqe3uye