Utilization of superconducting magnetic energy storage and doubly fed induction generator for enhancing stability of interconnected power system

Abstract

SummaryAs the share of wind power keeps on increasing, the interaction between synchronous and wind generators pose a challenging issue on power system stability. In order to investigate the impact of wind penetration on stability of power system, appropriate modeling of wind energy conversion systems (WECSs) is necessary. Moreover, it is needed to comprehensively study the impact of wind penetration on power system oscillations. This paper presents a didactic approach for integrating a doubly fed induction generator (DFIG)‐based wind farm from SimPower Systems library to a five‐area 68‐bus power system modeled in Simulink. Inter‐area oscillations with and without wind power penetration are investigated for their characteristics. Renewable energy sources are connected to the grid via power electronics converters at the cost of a reduction in inertia. The concept of virtual synchronous generator (VSG) produces virtual inertia by exchanging active power with the power system. The impact of superconducting magnetic energy storage (SMES) and DFIG on enhancing damping performance of inter‐area is investigated. The increase in damping ratios of inter‐area oscillatory modes verifies the enhancement in small signal stability by connecting SMES and DFIG to the power system. The usage of SMES operating in VSG mode to improve the dynamic stability with highly erratic wind profile is also investigated. The developed MATLAB/SIMULINK‐based DFIG model is simple to use and can be expanded to build efficient controllers. The fidelity of the DFIG model and VSG technology is verified in real time by Opal‐RT (OP4510).

A Comprehensive Review on Recent Developments of Hosting Capacity Estimation and Optimization for Active Distribution Networks

“…Hence, some frequency control techniques are investigated such as automatic generation control (AGC) regulators, and local frequency control (LFC) using optimization and data-driven methods [54], [99], [102]- [104]. Moreover, new virtual inertia compensation methods are used to improve the frequency stability in low-inertia ADNs, as discussed in [105]- [108].…”

“…In the extreme presence of non-dispatchable generation units (such as RESs) that require power electronic converters, the power system inertia is decreased which in turn in causing frequency instability as reviewed in [337], [414]. Therefore, the virtual inertia compensation algorithms are implemented with the inverters to improve the frequency stability in lowinertia ADNs, as discussed in [105]- [108]. Before calculating the HC value, it is essential to regulate the virtual inertia compensation techniques.…”

Virtual inertia and droop parameters quantitative determination method for VSC‐HVDC in receiving‐end area power systems with online inertia estimation based

“…With the growing penetration of power electronic converters interfaced with non-synchronous generators (SGs) in power systems, inertia and primary frequency regulation (PFR) response resources are becoming increasingly deficient, making it difficult to cope with frequency stability issues. 1 Meanwhile, inertia response resources exist not only in SGs due to the diversification of load forms and advanced control applied in power electronic converters, 2 which makes it impossible to obtain accurate system inertia information according to the state of SGs. Thus, accurately obtaining area power systems' inertia information and formulating inertia and PFR support control strategies are of great significance for frequency stability.…”