计及储能混合控制算法的微电网运行模式无缝切换控制策略研究

曹浪恒; 郑峰; 林祥群; 杨威

曹浪恒,郑峰,林祥群,杨威.计及储能混合控制算法的微电网运行模式无缝切换控制策略研究[J].电测与仪表,2022,59(6):1-11.
Cao Langheng,Zheng Feng,Lin Xiangqun,Yangwei.Research on seamless switching control strategy of micro-grid operation mode considering hybrid control algorithm of energy storage[J].Electrical Measurement & Instrumentation,2022,59(6):1-11.

计及储能混合控制算法的微电网运行模式无缝切换控制策略研究

Research on seamless switching control strategy of micro-grid operation mode considering hybrid control algorithm of energy storage

DOI：DOI: 10.19753/j.issn1001-1390.2022.06.001

中文关键词: 无缝切换分层控制二自由度电流预测模型动态全补偿

英文关键词:seamless switching, hierarchical control, two-degree of freedom control, current predictive model, dynamic full compensation

基金项目:福建省自然科学基金项目(2019J01249)

作者中文名	作者英文名	单位
曹浪恒	Cao Langheng	广东省电力设计研究院
郑峰	Zheng Feng	福州大学电气工程与自动化学院
林祥群	Lin Xiangqun	福州大学电气工程与自动化学院
杨威	Yangwei	武汉大学电气与自动化学院

摘要点击次数: 1342

中文摘要:

为了实现微电网不同运行模式间的无缝切换，文中提出了一种计及储能系统并网逆变器的混合型控制算法。针对逆变器的分层控制结构的特点，该算法融合了三类控制：二自由度控制原理、电流预测控制模型以及改进下垂控制相，将三种控制应用于逆变器的不同层。其中，控制层电流内环采用电流预测模型控制器替代PI控制器、PWM调节器；控制层电压外环则利用二自由度控制原理，构造被控对象逆模型，并在电流内环电流预测模型控制的基础上，单位化控制层传函，消除有害扰动量对储能控制系统的影响。应用层则采用以电压、频率为反馈量的改进下垂控制，实现孤岛微电网电压与频率的无差调节。并且此时储能系统控制层可作为微电网并/孤网运行时的共享层，因此在微电网运行模式切换过程中，其暂态冲击电流及母线电压畸变率也得到明显抑制。最后通过MATLAB/Simulink仿真系统，验证所提混合型控制算法的正确性与有效性。

英文摘要:

In order to realize the seamless switching of micro-grid operation mode, a hybrid control algorithm considering energy storage (ES) grid-connected inverter is proposed in this paper. Aiming at the characteristics of the hierarchical control structure of inverter, firstly, the two-degree of freedom control principle, the current predictive control model and modified droop control phase are combined, and three kinds of controls are applied to different layers of the inverter. Thereinto, together with current prediction model controller is adopted to replace PI controller and PWM regulator in the current inner loop of control layer. The principle of two-degree of freedom is adopted to construct the inverse model of the controlled object in the voltage outer loop of control layer. And based on the current model predictive control of inner current loop, the unit transfer function of the control layer is realized. Then, the influence of harmful disturbances on energy storage control system can be eliminated. For the application layer of ES system, the improved droop control with voltage and frequency as feedback is used to realize the voltage and frequency regulation of islanding micro-grid. And because the control layer can be used as the shared layer of ES system, during the switching process of micro-grid operation mode, the transient surge current and bus voltage distortion rate of micro-grid can be significantly suppressed. Finally, the correctsness and effectiveness of the proposed hybrid control algorithm are verified by MATLAB/Simulink simulation system.

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