Reactive power dispatch (RPD) is one of the important tasks in the operation and control of power system. This paper presents a Differential Evolution (DE) based approach for solving optimal reactive power dispatch including voltage stability limit in power systems. The monitoring methodology for voltage stability is based on the L-index of load buses. The objective is to minimize the real powe...

In this paper, an intelligent-gradient based algorithm is proposed to solve time optimal bang-bang control problem. The proposed algorithm is a combination of an intelligent algorithm called improved particle swarm optimization algorithm (IPSO) in the first stage of optimization process together with a gradient-based algorithm called successive quadratic programming method (SQP) in the second s...

The key of case-based reasoning process (CBR) is the case retrieval. With the increase of the number of cases, the efficiency of the case retrieval decreases. In order to ensure efficiency and stability of the CBR system, related clustering algorithms are introduced to make effective classification and improve the efficiency of the case retrieval. Results of many clustering algorithms are affec...

The performance of voltage stability indices in the multiobjective optimal power flow modern systems is presented this work. Six indices: Voltage Collapse Proximity Index (VCPI), Line Stability (LVSI), (Lmn), Fast (FVSI), Factor (LQP), and Novel (NLSI) were considered as case studies on a modified IEEE 30-bus consisting thermal, wind, solar hybrid wind-hydro generators. A evaluation using mayfl...

According to the existed structure and algorithm of extension controller, proposed an improved extension control algorithm based on the Optimal Control, which was named LQR-EC, and applied to a SIMO system—Crane-Double Pendulum System. And, using MATLAB simulation platform to study the effect of the LQR—EC Algorithm. The result shows that, the LQR-EC Algorithm not only has a simple theory, but ...

The necessity of Distributed Generation (DG) in the modern power system has increased greatly. Optimal placement and sizing DGs have a significant impact on objectives voltage stability enhancement, real reactive loss minimization security reliability. Different types such as Type I, II, III IVare placed. optimal these is found using Voltage Stability Index (VSI). done Differential Evolution (D...

In this paper, a novel generalized value iteration technique is presented for solving online the discounted linear quadratic (LQ) optimal control problems for continuous-time (CT) linear systems with an unknown system matrix A. In the proposed method, the discounted value function is considered, which is a general setting in reinforcement learning (RL) frameworks, but not fully considered in RL...

determining the optimal location of wells with the aid of an automated search algorithm is a significant and difficult step in the reservoir development process. it is a computationally intensive task due to the large number of simulation runs required. therefore,the key issue to such automatic optimization is development of algorithms that can find acceptable solutions with a minimum number of...