文章摘要
于淼,尚伟鹏,袁志昌,等.基于迭代辨识方法的含风电多干扰电力系统阻尼控制[J].电力系统自动化. DOI: 10.7500/AEPS20170227008.
Yu Miao,Shang Weipeng,Yuan Zhichang, et al.Damping Control of Wind Power System in Multi-Interference Environment Based on Iterative Identification Method[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20170227008.
基于迭代辨识方法的含风电多干扰电力系统阻尼控制
Damping Control of Wind Power System in Multi-Interference Environment Based on Iterative Identification Method
DOI:10.7500/AEPS20170227008
关键词: 递推最小二乘法  Vinnicombe距离  辨识误差  风电接入  阻尼控制
KeyWords: recursive least square method  Vinnicombe distance  identification error  wind power integration  damping control
上网日期:2017-09-08
基金项目:国家自然科学基金,北京建筑大学研究生创新项目
作者单位E-mail
于淼 北京建筑大学机电与车辆工程学院 olivermiaoer@163.com 
尚伟鹏 北京建筑大学机电与车辆工程学院 swp-study@foxmail.com 
袁志昌 清华大学电机系 yuanzc@tsinghua.edu.cn 
衣俊艳 北京建筑大学电气与信息学院 yijunyan@bucea.edu.cn 
摘要:
      风电接入电力系统后的低频振荡控制是保证电网稳定运行的关键。随着风电场联网规模的不断扩大,当风电接入由于电网结构、负荷潮流、发电机励磁控制等因素导致的阻尼不足形成的多干扰环境下电力系统后,模型辨识误差因素给电力系统的辨识与阻尼控制带来了很大的难题,常常会恶化阻尼控制效果。针对此问题,本文首先以风电功率波动信号作为辨识信号,建立风电接入多干扰环境下电力系统闭环模型;然后基于递推最小二乘法和Vinnicombe距离理论,提出一种迭代辨识方法,并给出方法实现的整个步骤,该方法充分考虑辨识误差因素在内,可以实时辨识出电力系统最优电力系统模型和最优阻尼控制器模型;最后,以风电接入四机两区域间降阶模型为例,采用本文提出的方法进行仿真,并与传统迭代辨识方法进行了对比。仿真结果表明本文提出方法的正确性和有效性,可以有效抑制风电接入下多干扰电力系统的低频振荡,实现稳定的阻尼控制。
Abstract:
      The low frequency oscillation control of wind power integration is the key to ensure the stable operation of power network. With the continued expansion of scale of wind farms network, when the wind power is connected to the power system lack of damping under multi-interference environment caused by the grid structure, the load current, the generator excitation control and other factors, the error factor of model identification brings great difficulty to the identification and damping control of power system, and it often deteriorates the effect of damping control. Aiming at this problem, firstly, the wind power fluctuation signal is used as identification signal, and power system closed-loop model under multi-interference environment considering the wind power integration is built; Then an iterative identification method based on recursive least square method and Vinnicombe distance is proposed. And the whole algorithm implementation steps are given. In this method, the optimal power system model and optimal damping controller model can be identified online by considering the identification error factors fully; Finally, taking the wind power access system model of four-machine two-area as an example, simulation is carried out using the method proposed and it compared with the traditional iterative identification method in this paper. Simulation results show the correctness and effectiveness of the proposed method, which can effectively suppress the low frequency oscillation under the multi-interference of power system with wind power integration, and can achieve stable damping control.
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