基于RT-LAB的直驱风电场振荡仿真分析技术

发布时间：2018-06-18 02:31

本文选题：阻抗分析法 + 实时仿真　；参考：《电网技术》2017年12期

【摘要】：直驱风电场并入弱交流电网时会出现振荡等不稳定问题,严重时会导致风电机组脱网、火电机组跳闸等事故。以新疆某地区的直驱风电场为研究对象,以阻抗分析法为依据,对直驱风电机组网侧逆变器进行阻抗理论建模,并在MATLAB中搭建风电机组逆变器并网模型,得到并网数字模型的阻抗来验证理论推导阻抗。最后以单机数字模型为基础,以新疆地区某直驱风电场的框架和参数为建模依据,考虑实时仿真的建模规则,在RT_LAB/MATLAB中搭建一个直驱风电场,依据并网点短路比的概念在直驱风电场和交流电网之间串入一定数值的电感模拟弱交流电网,最终复现出振荡,并简单分析了振荡的产生机理,为后续进一步解决直驱风电场振荡问题提供一种新的思路。
[Abstract]:When the direct-drive wind farm is merged into the weak AC power grid, there will be unstable problems such as oscillation, which will lead to the breakaway of wind turbine and tripping of thermal power unit. Taking a direct drive wind farm in Xinjiang as the research object, based on impedance analysis method, the impedance theory model of grid-side inverter of direct-drive wind turbine is modeled, and the grid-connected model of wind turbine inverter is built in MATLAB. The impedance of the grid-connected digital model is obtained to verify the theoretical derivation of impedance. Finally, a direct drive wind farm is built in RTLAB / MATLAB based on single-machine digital model, based on the frame and parameters of a direct drive wind farm in Xinjiang, and considering the modeling rules of real-time simulation. According to the concept of parallel network short-circuit ratio, a series of numerical values of inductance simulation weak alternating current network between direct drive wind farm and AC power network are put into the network, and the oscillation is reappeared finally, and the mechanism of oscillation is simply analyzed. It provides a new idea for further solving the oscillation problem of direct drive wind farm.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;国家电力调度控制中心;新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司);
【基金】：国家重点研发计划项目(2017YFB0902000) 国家电网公司科技项目(集群新能源发电与电网宽频带耦合机理及仿真与实证研究)~~
【分类号】：TM614

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