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1.现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市 132012
2.浙江科技大学自动化与电气工程学院,浙江省杭州市 310023
3.国网吉林省电力科学研究院,吉林省长春市 130000
姜超(1994—),男,博士,助理实验师,主要研究方向:新型电力系统频率稳定分析与控制。E-mail:2305577980@qq.com
杨冬锋(1976—),男,通信作者,博士,教授,主要研究方向:新型电力系统同步稳定性分析与控制、能源互联网优化控制与运行。E-mail:ydfnedu@126.com
郭书嘉(1993—),男,博士,副教授,主要研究方向:电力系统稳定与控制。E-mail:gsj122657522@hotmail.com
收稿:2024-07-12,
修回:2024-10-26,
网络出版:2025-01-13,
纸质出版:2025-05-25
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姜超,杨冬锋,郭书嘉等.跟网型直驱风机惯量控制下系统频率响应聚合建模[J].电力系统自动化,2025,49(10):39-48.
JIANG Chao,YANG Dongfeng,GUO Shujia,et al.Aggregation Modeling of System Frequency Response Under Inertia Control of Grid-following Direct-drive Wind Turbine[J].Automation of Electric Power Systems,2025,49(10):39-48.
姜超,杨冬锋,郭书嘉等.跟网型直驱风机惯量控制下系统频率响应聚合建模[J].电力系统自动化,2025,49(10):39-48. DOI: 10.7500/AEPS20240712001.
JIANG Chao,YANG Dongfeng,GUO Shujia,et al.Aggregation Modeling of System Frequency Response Under Inertia Control of Grid-following Direct-drive Wind Turbine[J].Automation of Electric Power Systems,2025,49(10):39-48. DOI: 10.7500/AEPS20240712001.
跟网型直驱风机惯量控制深刻影响系统受扰后频率响应形态。然而,目前研究并未清晰刻画出直驱风机参与频率调节主导响应环节,同时存在建模过于复杂而难以适用于频率特性分析的问题。因此,根据空气动力学方程、发电机模型、功率控制环节及其控制电路结构,文中针对两种典型直驱风机,分别推导其惯量控制的线性化模型,认识了电流控制-升压电路/定子电压动态回路的快速物理过程并对其进行合理忽略,发现两种类型直驱风机存在通用的频率响应机制,均可被描述为转速外环-风机转子运动方程的级联作用。进一步地,结合同步机组的频率响应模型,构建了含跟网型直驱风机惯量控制的系统频率分析聚合模型。同时,为适用于频率极值的解析计算,采用平衡截断法将聚合模型降阶为二阶模型。通过MATLAB/Simulink仿真验证了聚合模型及其降阶模型的准确性和适用性,并分析了控制参数和系统状态对频率动态特性和稳定裕度的影响。
The inertia control of grid-following direct-drive wind turbines significantly influences the system frequency response pattern after disturbances. However
current research has not clearly identified the dominant response link of direct-drive wind turbines in frequency regulation
while the modeling is too complicated to be suitable for frequency characteristic analysis. Therefore
the linearized models under inertia control are derived for two typical types of direct-drive wind turbines according to the aerodynamic equations
generator models
power control link
and control circuit structure. The fast physical process of current control-boost circuit/stator voltage dynamic loop is clearly understood and reasonably ignored. It is revealed that the two types of direct-drive wind turbines have a common frequency response mechanism which can be described as the cascade effect of the speed regulator-wind rotor motion equation. Furthermore
combined with the frequency response model of synchronous unit
the aggregation model of system frequency response under the inertia control of grid-following direct-drive wind turbines is constructed
and the aggregation model is reduced to a second-order model by the balance truncation method for analytical calculation of frequency extremes. The accuracy and applicability of the aggregation model and its reduced-order model are verified by MATLAB/Simulink simulation
and the influence of control parameters and system states on frequency dynamic characteristics and stability margin is analyzed.
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