Centralized Fuzzy Logic Based Optimization of PI Controllers for VSC Control in MTDC Network
- PDF / 1,704,310 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 85 Downloads / 229 Views
ORIGINAL ARTICLE
Centralized Fuzzy Logic Based Optimization of PI Controllers for VSC Control in MTDC Network Shahid Aziz Khan1 · Chongru Liu1 · Jamshed Ahmed Ansari1,2 Received: 13 April 2020 / Revised: 28 July 2020 / Accepted: 21 September 2020 © The Korean Institute of Electrical Engineers 2020
Abstract Advancements in the field of power electronics led to global changes in the electrical energy generation, transmission, and distribution. The voltage source converter (VSC) based HVDC system is the future of the power system due to the advantages it offers in terms of renewable power generation, transmission, and integration. Currently, the two-terminal VSC–HVDC systems have been successfully commissioned. Multi-terminal VSC–HVDC system is the developing trend for higher power reliability, large scale integration, and smart operation. The performance of a VSC based multi-terminal direct current (MTDC) system greatly depends upon the tuning of the controller. Standard practice is to tune the PI controller using hit and trial method or based on the operator’s experience. However, the tuning process becomes complex when multiple grids are involved. Thus, for MTDC systems, the manual tuning of the controller does not yield the desired results. This paper presents a centralized fuzzy logic-based optimization technique for VSC control of the MTDC system to obtain the optimized parameters for the PI controllers. The optimized parameters ensure a better system performance in terms of fast settling time, better slew rate, minimum undershoot, and minimum overshoot response. The proposed technique is tested on a three-terminal MTDC network in SIMULINK / MATLAB. Keywords VSC–MTDC · HVDC · Fuzzy logic · Optimization · PI controller · Overshoot · Settling time
1 Introduction Increasing energy demand and evolving global environmental challenges have directed researchers to opt for renewable energy resources rather than conventional coal power plants. Usually, renewable energy resources are located far away from the power demand centers. To reduce the energy transporting cost and losses, HVDC (high voltage direct current) technology is being adopted instead of a traditional HVAC (high voltage alternating current) transmission system. Recent literature shows various applications of the HVDC system in renewable energy resources [1–4]. The flexibility of large-scale integration of renewable energy resources, which are mostly located remotely into the existing grids, results in an increasing trend of multi-terminal direct current
* Shahid Aziz Khan [email protected] 1
School of Electrical and Electronics Engineering, North China Electric Power University, Beijing, China
Sukkur IBA University, Sukkur, Pakistan
2
(MTDC) [5–6]. VSC (voltage source converter) based MTDC scheme has advantages over classic HVDC technology in terms of reliability, inter-regional energy exchange, active and reactive power control. These features make the VSC-HVDC system advantageous compared to the traditional DC transmission system
Data Loading...
