Open AccessImproved Control Strategy for Doubly-fed wind Turbines in Weak Synchronous Support Systems
Author(s) -
Weiyuan Wang,
Fengshan Dou,
Mengmeng Yang,
Qinxin Huang,
Yifan Gao
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/486/1/012050
Subject(s) - turbine , wind power , stator , control theory (sociology) , electric power system , power (physics) , power control , ac power , transmission system , computer science , power optimizer , vector control , transmission (telecommunications) , engineering , control (management) , voltage , electrical engineering , maximum power point tracking , induction motor , physics , inverter , mechanical engineering , quantum mechanics , artificial intelligence
When the wind power is sent as the interface by the line commutated converter, the vector-controlled doubly-fed wind turbine will be difficult to operate without power supply support, and it is impossible to send the wind power through the HVDC transmission system on a large scale. Future planned land-based wind power bases are becoming more remote and may not contain synchronous units. Therefore, it is extremely urgent to design a dual-feeder control strategy that can operate independently. In this paper, the control target of the doubly-fed turbine is changed to control the stator voltage and frequency. An improved control strategy of the doubly-fed turbine in the weak synchronous support system is proposed. The doubly-fed turbine will have the ability to send out through the line commutated converter. The simulation analysis of the wind power access weak synchronous support system sent by the HVDC transmission system is carried out. Under the natural wind disturbance, the sending end and the receiving end communication system disturbance, the doubly-fed turbine can quickly resume normal operation. With the effectiveness of this control strategy, the doubly-fed turbine can operate independently even if it loses its synchronous power supply.