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Anti-lock Braking System (ABS) can be controlled by wheel slip regulation control method. Two output measured variables are usually considered for slip regulation: wheel speed (wheel's angular speed) and vehicle velocity. Accurate slip calculation is a key to control the ABS system. Since wheel slip control loop is utilized, the faultless operation of this control loop is strictly required. For this...
This paper proposed a novel strategy based on developed Ant Colony Optimization (ACO) algorithm which attempts to improve the voltage stability of the power systems with respect to minimum real power loss and proper voltages profile. This algorithm uses optimum settings of On-Line Tap Changer transformer (OLTC) and minimum number of Reactive Power Compensation Equipment (RPCE). The proposed algorithm...
In this paper, actuator fault detection and isolation is designed for two-area Automatic Generation Control (AGC) system. To isolate and estimate the possible actuator faults a bank of Sliding Mode Observer (SMO) is designed. Based on the designed observers, bank of residuals are defined correspondingly. The actuator faults can be isolated if only one residual goes to zero while the others do not...
In competitive electricity markets, procurement of spinning reserve (SR) as one of the most important ancillary services (AS); is the duty of transmission system operator (TSO). SR capacity allocated for satisfying reliability requirements and desired level of security in power systems causes replacing a part of deliverable energy capacity of units that must not be traded in the energy market. This...
Security in stressed power systems is seriously affected by voltage collapse phenomena. This paper proposes a new algorithm for determining the voltage security margin. The algorithm is based on the perturbation method and has a very high computational efficiency. Therefore it can be used for on-line and real-time voltage evaluation. The proposed approach has been validated using IEEE14, IEEE30 and...
Electricity industry is ongoing towards reregulation worldwide. Some new market issues that experienced in other commodities markets are suggested to be exercised in electricity markets. Electricity and ancillary services pricing under different schemes are such issues. Pricing mechanism can be applied via several sequential markets. A day-ahead market associated with joint energy and ancillary services...
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