计及储能动态的VSG惯量阻尼自适应控制研究
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引用本文:吴舟1,邹晓松1,2,袁旭峰1,2,辛晓云3,刘玉洁3,赵真3,熊焱3.计及储能动态的VSG惯量阻尼自适应控制研究[J].电网与清洁能源,2020,36(12):83~91
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作者单位
吴舟1 1. 贵州大学 电气工程学院 2. 贵州电力科学研究院 
邹晓松1,2 1. 贵州大学 电气工程学院 2. 贵州电力科学研究院 
袁旭峰1,2 1. 贵州大学 电气工程学院 2. 贵州电力科学研究院 
辛晓云3 3. 贵州大学 电气工程学院 
刘玉洁3 3. 贵州大学 电气工程学院 
赵真3 3. 贵州大学 电气工程学院 
熊焱3 3. 贵州大学 电气工程学院 
基金项目:国家自然科学基金项目(51667007);贵州省科学技术基金项目([2019]1128;[2018]5615)
中文摘要:随着风力发电、光伏发电等新能源发电渗透率增加,电力系统的等效惯量和等效阻尼逐渐减小,其稳定性问题变得越来越严峻。虚拟同步发电机(virtual synchronous generator, VSG)技术的提出能有效地解决这一问题。然而,传统的VSG并网逆变器采用恒惯量和阻尼控制,在系统受到扰动时,其鲁棒性较差。因此,为增强系统的鲁棒性,优化其频率响应曲线,本文提出了一种计及储能装置动态特性的并网VSG惯量阻尼自适应控制策略。首先,阐述了VSG的基本工作原理,然后通过建立其数学模型分析不同旋转惯量和阻尼系数对系统输出特性的影响。在此基础上,结合同步发电机(synchronous generator, SG)功角特性曲线和频率振荡曲线设计出旋转惯量和阻尼系数的自适应控制策略,该控制策略通过引入惯性环节以较好地匹配储能装置的动态特性。最后,通过MATLAB/Simulink仿真软件对比分析了所提控制策略和传统的VSG恒惯量和阻尼控制,结果验证了所提控制策略的正确性。
中文关键词:虚拟同步发电机  储能装置  旋转惯量  阻尼  自适应控制
 
Research on VSG Rotational Inertia and Damping Adaptive Control Considering Energy Storage Dynamics
Abstract:As the permeability of new energy generation such as wind power generation and photovoltaic power generation increases, the equivalent rotational inertia and equivalent damping of the power system gradually decrease, causing more and more severe stability problems to the system. The virtual synchronous generator (VSG) technology can effectively solve these problems. However, the traditional VSG grid-connected inverter adopts constant inertia and damping control, and its robustness is poor when the system is disturbed. Therefore, in order to enhance the robustness of the system and optimize its frequency response curve, an adaptive control strategy of grid-connected VSG rotational inertia and damping considering the dynamic characteristics of energy storage devices is proposed in this paper. First, the basic working principle of VSG is described, and then the influence of different rotary inertia and damping coefficients on the output characteristics of the system are analyzed by establishing their math models. On this basis, combined with the SG power angle characteristic curve and the frequency oscillation curve, an adaptive control strategy of rotary inertia and damping is designed. An inertia link is introduced to better match the dynamic characteristics of energy storage devices in the control strategy. Finally, the proposed control strategy is compared with the traditional VSG constant inertia and damping control by MATLAB/Simulink simulation, and the results verify the correctness of the proposed adaptive control strategy.
keywords:virtual synchronous generator  energy storage devices  rotational inertia  damping  adaptive control
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