Coordinated Control of DFIG Based Wind Farms and SGs for Improving Transient Stability

Journal Article · Fri Sep 21 00:00:00 EDT 2018 · IEEE Access

DOI:https://doi.org/10.1109/ACCESS.2018.2866252· OSTI ID:1564160

Zhou, Ming ^[1]; Dong, Zhe  ^[1]; Li, Hongyu  ^[2]; Gan, Chun  ^[3]; Li, Gengyin ^[1]; Liu, Yilu ^[4]

---

1. North China Electric Power Univ., Beijing (China). State Key Lab. for Alternate Electrical Power System with Renewable Energy Sources
2. Hohai Univ., Nanjing (China). College of Energy and Electrical Engineering
3. Huazhong Univ. of Science and Technology, Wuhan (China). School of Electrical and Electronic Engineering
4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Electrical Engineering and Computer Science

This paper proposes a coordinated control of doubly fed induction generator (DFIG)-based wind farms' (WFs) post-fault active power and synchronous generators' (SGs) tripping with the aim of improving transient stability of both the first swing and multi swings. To achieve it, the impact mechanism of the WFs' post-fault active power and SGs' tripping on the stability margin of each swing is first presented by using extended equal area criterion (EEAC). Based on this, a principle of the coordinated control is put forward. The WFs' control period is designed as six stages, and the value of post-fault active power in each stage is suggested to improve the stability of the first five swings and maintain the post-fault steady state. To decrease the tripping amount of the SGs, the SGs are tripped only when WFs' control effect is not sufficient to avoid the instability. Then, by utilizing an “online pre-decision and real-time matching”scheme, an engineering application method for the control principle is proposed, where the control procedures and detailed parameters calculation are demonstrated. The numerical simulations show that the coordinated control has a better damping effect and a less control cost (less amount of tripped SGs) than the traditional DFIG control or traditional SG tripping.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1564160
• Journal Information: IEEE Access, Vol. 6, Issue n/a; ISSN 2169-3536
• Publisher: IEEE
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
coordinated control
control cost
DFIG based wind farms
improving transient stability
doubly fed induction generator-based wind farms
stability margin
post-fault active power
post-fault steady state
control principle
control procedures
WF
SG tripping
WF control period
WF control effect
extended equal area criterion
EEAC