半月刊

ISSN 1000-1026

CN 32-1180/TP

+高级检索 English
基于系统辨识建模的微网二次电压频率控制器参数设计方法
作者:
作者单位:

可再生能源与工业节能安徽省工程实验室(合肥工业大学),安徽省合肥市 230009

作者简介:

通讯作者:

基金项目:

国家自然科学基金资助项目(51907045);安徽省自然科学基金资助项目(JZ2019AKZR0255)。


Parameters Design Method of Secondary Voltage and Frequency Regulation Controller in Microgrid Based on System Identification Modeling
Author:
Affiliation:

Anhui Province Renewable Energy Utilization and Energy Saving Laboratory (Hefei University of Technology), Hefei 230009, China

Fund Project:

This work is supported by National Natural Science Foundation of China (No.51907045) and Anhui Provincial Natural Science Foundation of China (No. JZ2019AKZR0255).

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    在采用由下垂或者虚拟同步机控制的逆变器构建的微网系统中,二次电压频率调节器参数优化是提高微网电压频率性能的关键。进行电压频率参数优化分析的前提是获取微网电压频率响应模型,但是由于微网系统结构复杂多样,系统内微源和负荷种类繁多,以及商业化电源广泛使用造成的电源模型难以获得等原因,给微网机理建模带来了很多困难。为解决上述问题,通过建立微网系统公共连接点电压频率响应模型结构,利用在微网中采样的运行数据以及系统辨识方法对模型中传递函数进行辨识,并利用辨识得到的模型对微网系统二次电压频率控制器进行参数优化。所提方法不仅可以在微网内部结构以及电源模型未知的情况下对微网进行建模,而且所建模型阶次低,便于调节器参数设计使用。最后,在微网实验平台上对所提方法的有效性进行了实验验证。

    Abstract:

    Parameters optimization of secondary voltage and frequency regulation controllers plays a key role in improving voltage and frequency quality in microgrid, especially for a microgrid system which consists of inverters controlled by droop or virtual synchronous generator (VSG) control. In order to complete the process of parameters optimization, the first step is to construct the voltage and frequency response model of microgrid. However, due to the complex structure of the microgrid system, multiple kinds of micro sources, loads and widely-used commercial power supply, the source model is hard to be obtained, which brings about lots of difficulties in microgrid mechanism modeling. To solve the above problem, a model structure of voltage and frequency at point of common coupling (PCC) for microgrid system is established. The transfer function in the model is identified by operation data sampled in the microgrid and system identification algorithm, and the parameters of second voltage and frequency controller in microgrid system is optimized by identified model. The proposed method can model the microgrid without knowing the inter structure of microgrid and source model, and the order of built model is low which is convenient for parameter planning of regulator. Finally, the effectiveness of proposed method is verified by experiments in test platform for microgrid.

    图1 微网系统电压频率控制框图Fig.1 Control diagram of voltage and frequency in microgrid system
    图2 微网二次电压频率控制简化框图Fig.2 Simplified diagram of frequency control of secondary voltage in microgrid system
    图3 微网模型结构Fig.3 Structure of microgrid model
    图4 微网调频控制系统优化实验波形Fig.4 Optimal experimental waveforms of frequency regulation system in microgrid
    图5 微网电压控制系统优化实验波形Fig.5 Optimal experimental waveforms of voltage regulation system in microgrid
    图 微网典型结构Fig. The typical structure of microgrid
    图 微网实验平台Fig. The microgrid experimental platform
    图 微网实验平台结构框图Fig. The structural diagram of microgrid platform
    图 二次调频控制框图Fig. Block diagram of secondary frequency regulation
    图 二次调频控制框图Fig. Block diagram of secondary frequency regulation
    图 二次调压控制框图Fig. Block diagram of secondary voltage amplitude regulation
    图 有功扰动时采样数据Fig. Sampled data during the active power step process
    图 PCC点频率测量值和模型响应对比Fig. Comparison between measured and model frequency response
    图 PCC点电压幅值采用smooth函数滤波前后对比Fig. PCC voltage amplitude with P0ST change though smooth filter
    图 PCC点电压测量值和模型响应对比Fig. Comparison between measured and model voltage
    图 无功扰动的时候采样数据Fig. Sampled data during the reactive power step process
    图 电压测量值和模型响应对比Fig. Measured and model PCC voltage amplitude response
    图 PCC点频率测量值和模型响应对比Fig. Measured and model PCC frequency response with Q0ST change
    图 二次频率控制系统根轨迹图Fig. The root locus of frequency secondary control system
    图 二次电压控制系统根轨迹图Fig. The root locus of voltage amplitude secondary control system
    参考文献
    相似文献
    引证文献
引用本文

施永,徐冬,于鸿儒,等.基于系统辨识建模的微网二次电压频率控制器参数设计方法[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190712002.
SHI Yong,XU Dong,YU Hongru,et al.Parameters Design Method of Secondary Voltage and Frequency Regulation Controller in Microgrid Based on System Identification Modeling[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190712002.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-07-12
  • 最后修改日期:2020-04-15
  • 录用日期:2019-11-28
  • 在线发布日期:
  • 出版日期: