Tzu Liang Bill Tseng

A new hybrid optimization algorithm for solving economic load dispatch problem with valve-point effect

This paper presents an efficient approach for solving the economic load dispatch (ELD) problem with valve-point effect using a new hybrid optimization algorithm. The main aim for solving ELD problem is to schedule the output of the committed generating units in order to meet the system load under various operating constraints. Since ELD is a non-linear and non-convex problem, stochastic search algorithms are considered as appropriate solutions. In this paper, the proposed new hybrid optimization algorithm is based on Clonal Selection Algorithm (CSA) that uses the positive features of two other optimization techniques, Gases Brownian Motion Optimization (GBMO) and Particle Swarm Optimization (PSO), for local search and improving the quality of initial population, respectively. To validate the efficiency of the proposed hybrid method, termed as PG-Clonal in this paper, we tested it on two systems considering different constraints, and the obtained results are compared with the results of existing stochastic search algorithms available in the literature. The test results demonstrate the effectiveness of the proposed new hybrid PG-Clonal method in solving the ELD problem efficiently.

Secure SCADA communication network for detecting and preventing cyber-attacks on power systems

This paper presents a scaled model for supervisory control and data acquisition (SCADA) communication network, which monitors and controls power distribution in residential areas. We recommend to integrate advanced communication technologies into current SCADA system to improve its performance in monitoring and controlling the operations of the power systems. This paper further proposes to use ad hoc wireless sensor networks in the residential areas as a part of SCADA communication in power distribution network. Moreover, a trust-based intrusion detection and prevention (IDP) technology built on monitoring, detecting, and rehabilitation (MDR) approach is applied to the proposed network for cyber security analysis. To verify the performance of the proposed SCADA communication network using MDR, simulation is carried out for three different cases and results demonstrate that the proposed MDR approach helps in detecting and preventing the malicious nodes in the network effectively.