Adaptive Over-Frequency Response Control for Wind Farm to Participate the System Frequency Regulation

2021 ◽  
pp. 381-390
Author(s):  
Kang Wang ◽  
Tianhu Wan ◽  
Hua Li ◽  
Kun Huang ◽  
Peng Kou
Keyword(s):  
Frequency Response ◽  
Wind Farm ◽  
Frequency Regulation ◽  
Response Control ◽  
System Frequency

scholarly journals Coordinated Sending-End Power System Frequency Regulation via UHVDC

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1909
Author(s):  
Qiaoming Shi ◽  
Hongqing Liu ◽  
Kai Liu ◽  
Yongping Wang ◽  
Qingwu Zhang ◽  
...  
Keyword(s):  
Frequency Response ◽  
Operating Conditions ◽  
Frequency Deviation ◽  
Frequency Regulation ◽  
Control Parameters ◽  
Response Control ◽  
Response Characteristics ◽  
Frequency Response Characteristics ◽  
System Frequency ◽  
Inertia Response

The continuous improvement of new energy penetration reduces the inertia of the system, which leads to the frequency deviation and the rate of change of frequency (RoCoF) being easily exceeded. To improve the frequency stability of sending-end power systems with large-scale renewable energy access via ultra-high voltage direct current (UHVDC), the coordinated frequency control for UHVDC participating in system frequency regulation (FR) including primary FR and system inertial response is presented. Based on the simplified system model, the mechanism of UHVDC participation in system frequency support and its influence on receiving-end system frequency response characteristics are analyzed. Compared with the inertia response and primary FR of traditional synchronous generators, the parameter calculating method of UHVDC coordinated frequency response control is proposed. Based on the system root trajectory analysis, the influence of the frequency response control parameters on the sending-end system’s stability is analyzed, and the constraints of UHVDC participating in the system frequency response control are analyzed. Then, based on the RTDS verification platform containing the Lingshao ±800 kV UHVDC control and protection system, the system frequency response characteristics under different control strategies, operating conditions and control parameters are verified and analyzed. The experimental results show that the UHVDC frequency coordinated control can effectively increase the equivalent inertia of the sending-end system, restrain the RoCoF and the frequency deviation, and increase the FR capability of the UHVDC system.

Time Sequence Coordination Frequency Control Strategy Design of Wind Farm

2014 ◽  
Vol 1070-1072 ◽  
pp. 319-326
Author(s):  
Zhi Xu ◽  
Hong Tao Wang ◽  
Cheng Ming He
Keyword(s):  
Control Strategy ◽  
Wind Farm ◽  
Frequency Control ◽  
Time Sequence ◽  
Frequency Regulation ◽  
Negative Effects ◽  
Primary Frequency ◽  
Primary Frequency Control ◽  
Strategy Design ◽  
System Frequency

For the rotor speed of variable speed wind turbine (VSWT) is decoupled from system frequency, the system equivalent rotary inertia and primary frequency control ability are decreased with wind power penetration growing continuously. To solve the problems, VSWT with additional frequency control was studied. The dynamic characteristics of input and output power of VSWT during participating in system frequency regulation are analyzed. The relationships between the active power increments and the duration of VSWT participating frequency control are quantified. A coordination frequency control strategy base on time sequence control is proposed. According to the control strategy, the VSWTs can participate in frequency regulation depending on the coordination of wind speed, power increments and duration. The simulation results demonstrate the effectiveness of the proposed control strategy, which can make full use of the frequency regulation ability of VSWTs as well as minimize the negative effects on system frequency.

scholarly journals An Extended System Frequency Response Model Considering Wind Power Participation in Frequency Regulation

Energies ◽  
2017 ◽  
Vol 10 (11) ◽  
pp. 1797 ◽  
Author(s):  
Yi Tang ◽  
Jianfeng Dai ◽  
Jia Ning ◽  
Jie Dang ◽  
Yan Li ◽  
...  
Keyword(s):  
Frequency Response ◽  
Wind Power ◽  
Frequency Regulation ◽  
Response Model ◽  
Extended System ◽  
System Frequency

scholarly journals Primary Frequency Stability Support of a DFIG in Association With Pitch Angle Control

2022 ◽  
Vol 9 ◽  
Author(s):  
Xiuli Si ◽  
Xiaoxin Wu ◽  
Feng You ◽  
Hongliang Yuan ◽  
Yien Xu ◽  
...  
Keyword(s):  
Frequency Response ◽  
Pitch Angle ◽  
Frequency Stability ◽  
Response Strategy ◽  
Frequency Regulation ◽  
Electric Power Grid ◽  
Doubly Fed ◽  
Primary Frequency ◽  
Primary Frequency Response ◽  
System Frequency

For an electric power grid that has large penetration levels of variable renewable energy including wind generation and photovoltaics, the system frequency stability is jeopardized, which is manifest in lowering frequency nadir and settling frequency. This paper suggests an enhanced primary frequency response strategy of a doubly-fed induction generator (DFIG) in association with pitch angle control. The DFIG works in de-loaded operation with a certain reserve power via pitch angle control prior to disturbances for frequency regulation. To address this, a function of the pitch angle is employed that decreases the pitch angle with time to slowly feed the active power to the power gird. The simulation results demonstrate the effectiveness and feasibility of the proposed primary frequency response strategy including the settling frequency and frequency nadir.

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