The kinetic energy stored in the rotating mass of wind turbine generators can provide the effective power quality solution to the inertia-free stand-alone (IFSA) microgrid by improving its stability. In conventional power systems, the power released from the inertia of synchronous generators regulates the system frequency. However, the frequency does not vary much even when a large disturbance or a load change occurs in the IFSA microgrid with only converter-based generators. This paper proposes a new inertia control method for a type-4 permanent magnet synchronous generator wind turbine system in the IFSA microgrid by utilizing the measurement of the dc-link voltage of the converter and its derivatives, not by the system frequency. Several case studies are carried out to evaluate the performance of the proposed inertia control in the IFSA microgrid with electromagnetic transients program-based simulation. Also, its effectiveness is verified with the experimental results from the hardware-in-the-loop test implemented by the controller interface with the digital signal processor, which is connected to the real-time digital simulator.
Bibliographical noteFunding Information:
Manuscript received July 24, 2017; revised December 19, 2017; accepted January 25, 2018. Date of publication May 23, 2018; date of current version September 17, 2018. Paper 2017-PSEC-0796.R1, presented at the 2017 IEEE Industry Applications Society Annual Meeting, Cincinnati, OH, USA, Oct. 1–5, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Power System Engineering Committee of the IEEE Industry Applications Society. This work was supported in part by the National Research Foundation of Korea funded by the Korea government (MEST) under Grant 2016R1E1A1A-02920095 and in part by the Power Generation and Electricity Delivery Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry and Energy, Republic of Korea, under Grant 20171220100330. (Corresponding author: Jung-Wook Park.) J. Kim and J.-W. Park are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea (e-mail:, firstname.lastname@example.org; email@example.com).
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering