Hierarchical Frequency Control Strategy of Microgrids with Virtual Synchronous Generators

被引：0

作者：

Chen M. ^{[1
]}

Xiao X. ^{[1
]}

Lai B. ^{[2
]}

机构：

[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing

[2] State Grid Zhejiang Electric Power Company Hangzhou Power Supply Corporation, Hangzhou

来源：

Gaodianya Jishu/High Voltage Engineering | 2018年 / 44卷 / 04期

关键词：

Frequency control; Hierarchical control; Internal model control; Microgrid; Virtual synchronous generator;

D O I：

10.13336/j.1003-6520.hve.20180329030

中图分类号：

学科分类号：

摘要：

To improve the frequency stability of islanded microgrid, we propose a hierarchical frequency control scheme based on the synchronous reference frame, in which the inner control level consists of voltage and current loops for tracking quickly and improving the quality of waveforms. The virtual synchronous generator with power-frequency droop mechanism is used for primary control in order to increase inertia and improve the stability of the microgrid. Then a frequency restoring strategy, i.e., secondary control is developed based on the internal model control. The effectiveness of the proposed control method is verified using a microgrid test system, which includes inverters with different kinds of control strategies, in PSCAD/EMTDC. The results show good robustness of the proposed secondary frequency control strategy based on the internal model control even considering communication delays. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：1278 / 1284

页数：6

共 22 条

[1]

Xiao X., Basic problems of the new complex AC-DC power grid with multiple energy resources and multiple conversions, Transactions of China Electrotechnical Society, 30, 15, pp. 1-14, (2015)

[2]

Zhou L., Luo A., Chen Y., Et al., A low-delay robust droop control method, Transactions of China Electrotechnical Society, 31, 11, pp. 1-12, (2016)

[3]

Zhu X., Chen D., Fang Z., Et al., Mean cost-based droop scheme in the application of distributed generators, Power System Protection and Control, 43, 10, pp. 14-20, (2016)

[4]

Zheng T., Chen L., Chen T., Et al., Review and prospect of virtual synchronous generator technologies, Automation of Electric Power Systems, 39, 21, pp. 165-175, (2015)

[5]

Cheng Q., Yang X., Chu S., Et al., Research on control strategy of PV system based on virtual DC generator, High Voltage Engineering, 43, 7, pp. 2097-2104, (2017)

[6]

Frack P.F., Mercado P.E., Molina M.G., Et al., Control strategy for frequency control in autonomous microgrids, IEEE Transactions on Power Electronics, 3, 4, pp. 1046-1055, (2015)

[7]

Wang K., Wang Z., Chai J., Et al., Analysis of grid-connecting pre-synchronized process for synchronously controlled inverter power source, Automation of Electric Power Systems, 39, 12, pp. 152-158, (2015)

[8]

Liu J., Miura Y., Ise T., Comparison of dynamic characteristics between virtual synchronous generator and droop control in inverter-based distributed generators, IEEE Transactions on Power Electronics, 31, 5, pp. 3600-3611, (2016)

[9]

Zeng Z., Shao W., Ran L., Et al., Mathematical model and strategic energy selection of virtual synchronous generators, Automation of Electric Power Systems, 39, 13, pp. 22-31, (2015)

[10]

Wu H., Ruan X., Yang D., Et al., Small-signal modeling and parameters design for virtual synchronous generators, IEEE Transactions on Industrial Electronics, 63, 7, pp. 4292-4303, (2016)

← 1 2 3 →