风能驱动发电机宽频振荡监测方法研究

A Study on the Broadband Oscillation Monitoring of Wind-Driven Generators

中文关键词:双碳目标  宽频振荡  监测设备  最小二乘法

keywords:dual carbon target  wide frequency oscillation  monitoring equipment  least square method

中文摘要:对风能驱动发电机宽频振荡实施监测的传统方法一般是依据频率、分辨率来获取其固定频率点的参数，无法实现同步采样，所得结果误差较大。设计一种可应用于风能驱动发电机宽频振荡监测的新方法。对发电机宽频振荡数据进行同步采集设计；对宽频相量进行处理，获得模态频率和模态电流幅值后对宽频状态进行估计；通过分析监测支路上线路电流与节点电压之间的关系，得到风能驱动发电机宽频振荡的监测值与预测值之间的关系，实现精准监测。实验测试结果表明：设计的监测方法在宽频振荡的幅值、频率和相位等参数上的监测误差均小于0.1%，验证了该方法的有效性。

Abstract:The traditional broadband oscillation monitoring method of wind driven generators is typically relies on frequency and resolution to obtain the parameters of broadband oscillation frequency points， which cannot achieve synchronous sampling and the results of obtaining parameters at fixed frequency points have significant errors. Therefore， a new method suitable for broadband oscillation monitoring of wind driven generators is designed. Firstly， the synchronous data acquisition for generator broadband oscillation is designed； secondly， after obtaining oscillation data， the wideband phasor is processed to obtain the modal frequency and modal current amplitude， and the wideband state is estimated； Finally， the relationship between the line current and node voltage on the monitoring branch is analyzed to obtain the relationship between the monitoring value and oscillation prediction value， thus achieving accurate monitoring of broadband oscillation of wind energy driven generators. The experimental test results show that the monitoring error of the designed monitoring method on the amplitude， frequency， phase and other parameters of broadband oscillation is less than 0.1%， verifying the effectiveness of the designed monitoring method.