A UPFC‐based robust damping controller for optimal use of renewable energy sources in modern renewable integrated power systems

Abstract

This paper proposes coordinated design of wide‐area damping controller (WADC) in the presence of renewable energy resources in a large‐scale power system. To tackle with constant and time‐varying delays in wide‐area system, a robust criterion based on H∞ has been used for the coordinated WADC design. By using an auxiliary function in Lyapunov function, conservatism of linear inequality matrix (LMI) is reduced, such that larger delay margin and larger feasibility region is obtained in the presence of delays. The wind farms here are composed of doubly‐fed induction generator (DFIG) and squirrel‐cage induction generator (SCIG), which are connected to common bus of photovoltaic (PV) system by using unified power flow controller (UPFC). Then, the renewable energy units are integrated with 10 and 16‐machine power systems. Afterwards, by identifying oscillating modes, the coordinated design of WADC is carried out for rotor‐side‐converter (RSC) in DFIG, DC/AC converter in the PV units, shunt converter (SHC) in UPFC, and power system stabilizer (PSS). Different scenarios of power system operating conditions are considered to evaluate performance of the proposed approach. The simulations in power system analysis toolbox (PSAT) and programming in MATLAB demonstrate effectiveness of the conducted method.

Solar, Wind and Their Hybridization Integration for Multi-Machine Power System Oscillation Controllers Optimization: A Review

“…High-tech advancements in power electronic converters have greatly influenced the large-scale adoption of grid-wind-integrated energy systems [26]. Nonetheless, integrating this converterdriven renewable energy solution into the electrical grid causes several technical issues, particularly power system oscillations, which generally impair the overall power transmission capability of already-installed transmission lines [27,28]. These oscillations are basically of various electromechanical modes based on their frequency range of occurrence.…”

“…Thus flexible AC transmission systems (FACTSs) introduced by Hingorani are an intriguing alternative because, when used in conjunction with a power oscillation damping (POD) controller system, they can add extra damping to the inter-area oscillation modes in addition to improving the performance of the power system [29]. Due to the robust nature of RES-integrated electric power systems, robust damping controller like FACTS controller, and PSS are combined and coupled to grid synchronous generators [27].…”

Design of a new robust controller for voltage regulation of DC link in wind‐farm‐side converter integrated with a hybrid AC and DC large‐scale power system

“…Regarding the widespread use of wind-based energies and integration of large-scale offshore wind farms (OWFs) in today's power systems, it is necessary for the power system operator to tackle with the related technical, economic, and environmental challenges [1][2][3]. For example, along with increasing the capacity of offshore wind farms and their distance from the power grid, there is considerable capacitive current in long AC cables, which constrains the transmission capacity, and it requires compensation of reactive power [4].…”

Coordination of power system stabilizers using scenario based optimization for enhancement of small‐signal stability considering uncertainties

“…The results show that the proposed method helps to reduce the settling time and overshoot values. The authors of [21] have designed the wide area power oscillation damping controllers using robust control method and have achieved good damping under under renewable energy resources and time delay variation. A brief summary of all the related works is shown in Table 1.…”