This paper investigates the load frequency control problem for a multi-area power system taking into consideration system parameter variations. This paper proposes an intelligent control scheme for load frequency control (LFC) of interconnected power systems. A fuzzy logic based integral controller is proposed for two area power system interconnected via parallel ac/dc transmission link. The si...

The objective of this paper is to investigate the cause of several unexpected high amplitude oscillations that occurred in the surge tank water level of a real hydropower plant during secondary load-frequency control (LFC) maneuvers, after the replacement of the turbine runner, and to propose solutions that allow the power plant to continue providing secondary LFC in a safe and reliable manner....

Generation and distribution of electric energy with good reliability and quality is very important in power system operation and control. This is achieved by Automatic Generation Control (AGC). In an interconnected power system, as the load demand varies randomly, the area frequency and tie-line power interchange also vary. The objective of Load Frequency Control (LFC) is to minimize the transi...

This paper presents a new approach to Load Frequency Control (LFC) for a hydro-power plant. The control algorithm combines sliding mode control with H∞ technique. The dynamic model of an entire hydro-power plant has been developed. The sliding hyperplane is constructed by H∞ full state feedback control method. The ideal lossless turbine-penstock model is used in this paper to conduct the simula...

Abstract: The Load Frequency Control problem has been a major subject in electrical power system design/operation and is becoming more significant recently with increasing size, changing structure and complexity in interconnected power systems. In practice LFC systems use simple proportionalintegral controllers. However, since the PI control parameters are usually tuned based on classical or tr...

In the LFC problem, the interconnections among some areas are the input of disturbances, and therefore, it is important to suppress the disturbances by the coordination of governor systems. In contrast, tie-line power flow control by TCPS located between two areas makes it possible to stabilize the system frequency oscillations positively through interconnection, which is also expected to provi...

Since renewable energy sources (RESs) have an intermittent nature, conventional secondary frequency control, i.e., load control (LFC), cannot mitigate the effects of variations in system frequency. Thus, this paper proposes incorporating ultralocal model (ULM) into LFC to enhance microgrid (µG) stability. ULM controllers are regarded as model-free that yield high rejection rates for disturbance...

A large penetration of photovoltaic and wind power generation causes the imbalance between supply and demand in power systems because their output is intermittent. To alleviate the mentioned problem, many researches on Load Frequency Control (LFC) using Electric Vehicles (EVs) as controllable loads have been studied. In this paper, we propose a new LFC method using EVs, which is named the State...

Load frequency control in power systems introduces as one of the most important items in order to supply reliable electric power with good quality. The goals of the Load Frequency Control (LFC) are to maintain zero steady state errors in a two area interconnected power system. To achieve this goal a fast controller with having no steady-state error will be necessary to be included in power syst...

In this paper, a robust Takagi-Sugeno Fuzzy Parallel Distribution Compensation (TSFPDC) technique is proposed for the solution of Load Frequency Control (LFC) problem in the interconnected power system. In this strategy, control signal is tuned online from the knowledge base and the fuzzy inference which request fewer sources. In order to minimize the efforts of load disturbances and achieve th...