基于导前微分控制的虚拟同步发电机功频特性控制策略  

POWER FREQUENCY CHARACTERISTIC CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS GENERATOR BASED ON LEADING DIFFERENTIAL CONTROL

作　　者：高长伟 黄翀阳 郭丹[3] 黄志东 Gao Changwei;Huang Chongyang;Guo Dan;Huang Zhidong(Global 100-100 School,Liaoning Institute of Since and Technology,Benxi 117004,China;School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;College of Information and Electrical Engineering,Shenyang Agricultural University,Shenyang 110866,China)

机构地区：[1]辽宁科技学院中美双百学院,本溪117004 [2]沈阳工业大学电气工程学院,沈阳110870 [3]沈阳农业大学信息与电气工程学院,沈阳110866

出　　处：《太阳能学报》2023年第4期359-370,共12页Acta Energiae Solaris Sinica

基　　金：辽宁省教育厅基本科研项目(LJKMZ20221687);辽宁科技学院博士科研基金(2107B01)。

摘　　要：该文对可再生能源发电并网逆变器虚拟同步发电机(VSG)控制策略进行研究,针对传统VSG不能兼顾动态调节特性与稳态性能这一缺陷,提出一种改进的虚拟同步发电机控制策略。在传统同步发电机本体控制算法数学模型分析基础上,建立虚拟同步发电机有功功率对于频率波动的闭环传递函数,研究动态过渡过程中转动惯量与阻尼对有功功率响应的影响机理。在传统VSG功频控制器中引入导前微分控制环节与惯性校正环节,提出基于导前微分控制的改进虚拟同步发电机功频控制策略,建立有功功率对于频率波动的闭环传递函数,分析离网与并网状态下的功频特性。通过对导前微分环节控制参数的调节,抑制过渡过程中的功率振荡,实现VSG动态特性与稳态性能的解耦控制。This paper studies the control strategy of virtual synchronous generator(VSG)for grid-connected inverter of renewable energy units.In view of the contradiction between the dynamic regulation characteristics and the steady state performance of the traditional VSG,an improved virtual synchronous generator control strategy is proposed.Based on the analysis of the mathematical model of the traditional synchronous generator ontology control algorithm,the closed-loop transfer function of active power and the frequency fluctuation for the virtual synchronous generator is established.The influence mechanism of the inertia and damping on the active power response in the dynamic transition process is analyzed.The leading differential control and the inertial correction are introduced into the traditional VSG power frequency controller,a power frequency control strategy for improved virtual synchronous generator based on pre-derivative control is proposed.The closed-loop transfer function of active power and frequency fluctuation is established,and the power frequency characteristics in the off-grid and grid-connected state are analyzed.The power oscillation in the transition process can be effectively suppressed by adjusting the control parameters of the pre-derivative control link,and the decoupling control of VSG dynamic characteristics and steady-state performance is realized.

关 键 词：可再生能源 虚拟同步发电机 电能质量 频率稳定 导前微分控制 

分 类 号：TM615[电气工程—电力系统及自动化]