PSS/E环境下的第二代风机模型解析与低电压穿越功能优化增强

Mechanism of 2nd-generation Wind Turbine Model and Functional Optimization of Low Voltage Ride-through Based on PSS/E

PSS/E作为广泛应用且功能强大的电力系统专业仿真分析软件,在模型仿真研究中具有巨大优势。但PSS/E的暂态模型在对风电机组的低电压穿越描述中存在缺陷,致使PSS/E环境下的风电建模仿真无法进行有效深入的并网研究,对于电网规划建设及运行控制各个环节,均降低了实际参考指导意义。通过全面解析PSS/E第2代风机模型的构建机理,阐述其在风机低电压工况描述上的优势与不足,并应用PSS/E强大的暂态模型自定义功能对其低穿特性进行功能补充优化。该工作填补了基于PSS/E第2代风机模型进行功能扩展上的研究空白,丰富了PSS/E暂态模型库,赋予该软件平台进行大规模可再生能源并网发电暂态分析的核心功能。结合风机实际电压跌落故障下的输出特性,通过仿真对比验证了该模块的准确性与实用性。

As a powerful power system simulation software with wide applications,PSS/E has considerable advantage in the study of model simulations.However,there exits some shortcomings in the description of low voltage ride-through(LVRT)of wind turbine unit by the PSS/E transient model,which makes the wind power modelling and simulation based on PSS/E cannot be applied to the study of grid integration.As a result,the reference values to engineering practice will decrease in different links,such as the planning and construction of power grid,as well as its operation and control.In this paper,according to the analysis of the principle for the PSS/E 2nd-generation wind turbine model,the advantage and disadvantage in describing the low-voltage operation conditions of wind turbine are elaborated.In addition,the user-defined functions of the transient model in PSS/E are applied to perform functional optimization for the LVRT characteristics.The research in this paper extends the functions of the 2nd-generation wind turbine model based on PSS/E and enriches the transient model library in PSS/E,which empowers this software platform with core functions to perform transient analysis for the grid integration of large-scale renewable energy power generation.Finally,combined with the output characteristics of wind turbine under the actual voltage drop fault,the correctness and practicability of the user-defined module are compared and verified through simulations.