Modular Multilevel Converter Synthetic Inertia-Based Frequency Support for Medium-Voltage Microgrids
Modular Multilevel Converter Synthetic Inertia-Based Frequency Support for Medium-Voltage Microgrids
复制标题
适用于中压微电网的模块化多电平变流器基于合成惯性的频率支持
DOI：
10.1109/tie.2018.2890491
复制
发表时间：
2019-01
影响因子：
7.7
通讯作者：
Wang Peng
中科院分区：
文献类型：
--
作者：
Yang Shunfeng;Fang Jingyang;Tang Yi;Qiu Huan;Dong Chaoyu;Wang Peng
可再生能源通过快速响应电力转换器的高渗透导致传统同步发电机的相当大的位移以及频率控制的系统惯性的损失。模块化多电平转换器（MMC）可用作大规模可再生能源发电和电网之间的接口。在通过 MMC 集成的可再生能源比例较高的微电网中，子模块 (SM) 电容器可用作储能，为系统频率支持提供一定程度的合成惯性。本文定量地利用了具有灵活的可再生能源渗透水平的微电网中的 MMC 合成惯性。提出了MMC惯性系数的概念。主要受MMC的穿透比、SM电容和调制指数的影响，并受到系统运行的限制。根据分析，系统惯性的很大一部分可以由正确设计的 MMC 提供。详细介绍了 MMC 频率控制环路。电容器平均电压与频率偏差成比例，以便在频率事件期间灵活调整电容器能量。 MMC输出有功功率根据电容器能量变化率有意地同时调节。通过控制MMC电容器电压、直流侧功率和输出有功功率，SM电容器可以释放或吸收一定量的能量，以改善频率事件瞬变期间的系统频率响应，而可再生发电几乎不受影响。所提出的概念经过实验验证，结果表明，通过适当的系统参数和控制回路，可以显着降低线路频率偏差和频率变化率。系统频率特性的理论计算与实验结果吻合良好。
High penetration of renewable energies through fast-response power converters results in a considerable displacement of conventional synchronous generators and losing of system inertia for frequency control. Modular multilevel converters (MMCs) can be employed serving as an interface between the large-scale renewable generation and power grids. In a microgrid with high shares of renewables integrating through MMCs, submodule (SM) capacitors can be used as energy storage to provide a degree of synthetic inertia for system frequency support. This paper quantitatively exploits the MMC synthetic inertia in a microgrid with flexible renewable penetration levels. An MMC inertia coefficient concept is proposed. It is mainly affected by the penetration ratio, the SM capacitance, and the modulation index of an MMC, with the system operation constraints. According to the analysis, a substantial portion of system inertia can be provided by properly designed MMCs. Detailed MMC frequency control loops are presented. The capacitor average voltage is proportionally linked to the frequency deviation, in order to flexibly adjust the capacitor energy during frequency events. The MMC output active power is deliberately and simultaneously regulated according to the capacitor energy change rate. By controlling the MMC capacitor voltage, dc side power, and output active power, an amount of energy can be released or absorbed by SM capacitors to improve the system frequency response during the frequency event transients, while the renewable generation is scarcely influenced. The proposed concept is experimentally verified and the results show that, with proper system parameters and control loops, the line frequency deviation and the rate of change of frequency can be significantly reduced. Good agreements of the system frequency characteristics have been achieved between the theoretical calculation and experimental results.
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DOI：
10.1109/pesgm.2015.7286086
发表时间：
2015-07
期刊：
2015 IEEE Power & Energy Society General Meeting
影响因子：
--
作者：
O. Adeuyi;M. Cheah‐Mane;Jun Liang;N. Jenkins;Yanan Wu;Chang Li;Xueguang Wu
通讯作者：
O. Adeuyi;M. Cheah‐Mane;Jun Liang;N. Jenkins;Yanan Wu;Chang Li;Xueguang Wu
影响因子：
6.7
作者：
Peng Wang;Yi Tang
通讯作者：
Peng Wang;Yi Tang
DOI：
10.1109/jestpe.2015.2439053
发表时间：
2015-06
影响因子：
5.5
作者：
P. F. Frack;P. Mercado;M. Molina;E. Watanabe;R. D. De Doncker;H. Stagge
通讯作者：
P. F. Frack;P. Mercado;M. Molina;E. Watanabe;R. D. De Doncker;H. Stagge
影响因子：
6.7
作者：
Jingyang Fang;Yi Tang;Hongchang Li;Xiaoqiang Li
通讯作者：
Jingyang Fang;Yi Tang;Hongchang Li;Xiaoqiang Li
影响因子：
8.8
作者：
Delille, Gauthier;Francois, Bruno;Malarange, Gilles
通讯作者：
Malarange, Gilles