Local Grid-Tied DFIG Wind Energy Conversion System скачать в хорошем качестве

Local Grid-Tied DFIG Wind Energy Conversion System

Authors and Affiliations: Subhadip Chakraborty, Member, IEEE, Bhim Singh, Fellow , IEEE , and, BK Panigrahi, Fellow , IEEE Department of Electrical Engineering, Indian Institute of Technology, Delhi, New Delhi, India-110016, Ambrish Chandra, Fellow, IEEE and Kamal Al-Haddad, Life Fellow, IEEE Department of Electrical Engineering, School of Advanced Technology, Montreal, Quebec, Canada Paper Abstract: Community and residential loads connected to low-voltage AC distribution networks require a neutral point connection. Neutral point forms return path for single-phase loads. The presence of neutral wire reduces the effect of unbalanced loading of one phase to get reflected on other load phases. It helps during fault conditions to minimize the effect of circulating current by providing a low-impedance path. However, in the case of harmonically polluted load currents, the rating of the neutral conductor increases, leading to additional losses and unwanted heating affecting other components of the network. Wind energy conversion systems (WECS) use transformers for connection to AC networks to reduce the requirement of a higher rating and size of DC link capacitor. Neutral current and harmonic currents of load are processed through the transformer, which leads to additional heating of the transformer, which is detrimental for connected loads. Such conditions can lead to the failure of WECS operation and damage transformers and connected sensitive loads due to the flow of circulating currents. Hence, this work presents the design and control of a novel four-wire topology of a WECS consisting of a doubly fed induction generator (DFIG) and a battery energy storage (BES). A grid forming converter (GFC) is deployed to provide independent compensation for load neutral and harmonic currents without affecting the WECS transformer, reducing its failure and heating rate. WECS converters are controlled to improve the power quality of stator current and point of common coupling (PCC) voltage as per the IEEE 519-2022 std. Simulation results present the MPPT operation of WECS with neutral and harmonic compensation even during dynamic conditions. The developed hardware prototype for system validation, as demonstrated in this video, is carried out using a three-phase three wire version of the system and the development of the three phase four wire version for the system is under progress.