Stable stepwise short-term frequency support of a DFIG-based wind farm

2017 ◽  
Vol 28 (3) ◽  
pp. e2495 ◽  
Author(s):  
Dejian Yang ◽  
Moses Kang ◽  
Jinho Kim ◽  
Junhee Hong ◽  
Yong Cheol Kang
Keyword(s):  
Wind Farm ◽  
Short Term ◽  
Term Frequency

scholarly journals Two-Phase Short-Term Frequency Response Scheme of a DFIG-Based Wind Farm

2021 ◽  
Vol 9 ◽  
Author(s):  
Dejian Yang ◽  
Shun Sang ◽  
Xinsong Zhang
Keyword(s):  
Frequency Response ◽  
Wind Farm ◽  
Operating Conditions ◽  
Control Coefficient ◽  
Short Term ◽  
Two Phase ◽  
Term Frequency ◽  
Point Tracking ◽  
Control Gain ◽  
System Frequency

The kinetic energy stored in the doubly-fed induction generators (DFIG)-based wind farm can be utilized to sustain the dynamic system frequency. However, difficulties arise in determining the control gain to effectively improve the frequency nadir and smoothly return to the maximum power point tracking (MPPT) operation. This paper addresses a two-phase short-term frequency response (STFR) scheme to boost the frequency nadir and minimize the second drop in the system frequency based on a piecewise control gain. To achieve the first goal, a constant control coefficient, which is determined according to the initial operating conditions of the DFIG-based wind farm, is employed until the frequency nadir produces. To achieve the second goal, the control coefficient, which changes with time, facilitates to smoothly return to the MPPT operation. The effectiveness of the proposed two-phase STFR scheme is verified under various wind power penetration levels, wind speeds, and disturbances. The results reveal that the frequency nadir is improved, and simultaneously, it smoothly returns to the MPPT operation and minimizes the second drop in the system frequency.

scholarly journals Aerodynamic-Efficiency-Constrained Short-Term Frequency Support Control of Wind Turbine Generators

2020 ◽  
Vol 53 (2) ◽  
pp. 12115-12120
Author(s):  
Zhengyang Zhang ◽  
Zaiyu Chen ◽  
Guoqiang Yu ◽  
Tianhai Zhang ◽  
Minghui Yin ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Short Term ◽  
Aerodynamic Efficiency ◽  
Term Frequency ◽  
Turbine Generators ◽  
Wind Turbine Generators

Real‐time optimisation of short‐term frequency stability controls for a power system with renewables and multi‐infeed HVDCs

2018 ◽  
Vol 12 (13) ◽  
pp. 1462-1469 ◽  
Author(s):  
Luping Wang ◽  
Xiaorong Xie ◽  
Xiaoliang Dong ◽  
Ying Liu ◽  
Hongming Shen
Keyword(s):  
Power System ◽  
Real Time ◽  
Frequency Stability ◽  
Short Term ◽  
Term Frequency
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