Impact of Inertia Control of DFIG-Based WT on Electromechanical Oscillation Damping of SG
Impact of Inertia Control of DFIG-Based WT on Electromechanical Oscillation Damping of SG
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DOI：
10.1109/tpwrs.2018.2801283
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发表时间：
2018-02
影响因子：
6.6
通讯作者：
Jie Ying;Xiaoming Yuan;Jiabing Hu;Wei He
中科院分区：
文献类型：
--
作者：
Jie Ying;Xiaoming Yuan;Jiabing Hu;Wei He
基于双馈感应发电机（DFIG）的风力发电机（WT）在电力系统中占有很高的渗透率，并且被要求模拟同步发电机（SG）的惯性响应。因此，研究双馈风力发电机惯性控制对发电机机电振荡阻尼的影响具有重要意义。然而，以特征值分析法为主的相关研究还不够，普遍的机理研究还很缺乏。本文采用新的方法研究了风力发电机惯性控制参数（比例常数和时间常数）对蒸汽发生器爆炸物发生率的影响规律和机理。首先，基于运动方程的概念，推导了惯性控制下的风力发电机线性化模型，该模型能明确描述风力发电机的外特性。从模型中可以看出，比例常数决定了行波管的惯性特性，而时间常数对行波管的阻尼特性有决定性的影响。然后，通过建立潜器和潜器的运动方程模型，对惯性控制参数对潜器爆炸物处理效果的影响规律和机理进行了分析。此外，由于变惯量控制参数意味着WT的变惯量和阻尼系数，因此可以从一般的角度理解冲击机理。
Doubly fed induction generator (DFIG)-based wind turbines (WTs) occupy a high penetration in power systems and are being required to emulate inertia response as synchronous generators (SGs). Therefore, it is of value to study the impact of inertia control of DFIG-based WT on electromechanical oscillation damping (EOD) of SG. However, relevant studies that are mainly based on eigenvalue analysis method are not enough and general mechanism study is still lacking. This paper studies the impact rules and mechanism of inertia control parameters (proportional constant and time constant) of WT on EOD of SG with a novel approach. First, linearized model of WT under inertia control is derived based on motion equation concept, which can explicitly describe the external characteristic of WT. From the model, it is clear that the proportional constant determines the inertia characteristic of WT, while time constant has decisive effect on the damping characteristic. Then, by interaction analysis based on motion equation models of both SG and WT, the impact rules and mechanism of inertia control parameters on EOD of SG are explained clearly. Besides, since variable inertia control parameters mean variable inertia and damping coefficients of WT, the impact mechanism can be understood from a general perspective.