Abstract
An isolated power system (IPS) is usually operated under a bad environment and is influenced by external disturbances. Advanced load restoration technology is an important way to enhance the survivability and reliability of IPS. This paper proposes a fast load restoration approach based on Input-to-State Stability (ISS) theory for IPS. The method can recover load after an outage happens in an IPS under severe perturbations. In the proposed restoration approach, both stability and security constraints are considered based on the ISS theory, which can guarantee the stable and secure operation of IPS during the restoration dynamic process. These constraints have good adaptability for topology transformation and operation status transition of IPS. A heuristic approach to efficiently solve the load restoration problem is proposed, where bisection search is used to check the feasibility of the loads to be restored. Case studies on a typical IPS are used to verify the proposed method.
Highlights
An isolated power system (IPS) [1] is often used in locations such as aircrafts, shipboards, and space stations, and is usually operated under persistent disturbances
To reach a fast load restoration, a heuristic approach is proposed to optimize the survivability of the IPS at each restoration stage, and the loads to be restored are arranged in order according to their level of importance and capacity
This paper presents a novel idea on the fast restoration of IPS, the major advantage of which is its ability to satisfy transient stability and security requirements of IPS
Summary
An isolated power system (IPS) [1] is often used in locations such as aircrafts, shipboards, and space stations, and is usually operated under persistent disturbances. Other optimization objectives, such as power loss reduction are considered in [3] Methods such as heuristic approaches [4,5,6], expert systems-based strategies [7], and mathematical programming approaches [8] are proposed to solve the optimization problem. In [16], a decomposed input-output stability analysis method is presented based on the operator approach, while the state dynamics are not fully considered. This paper proposes a fast load restoration approach with stability and security constraints for IPS with flexible topologies. The advantages of the proposed method are as follows: First, based on the ISS theory, an analytical stability and security criterion is obtained to guarantee the stable and secure operation of IPS during and after the restoration procedure.
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