STABILITY MARGIN ANALYSIS AND OPTIMAL DESIGN METHOD OF CONTROL PARAMETERS FOR MULTI-SOURCE AND MULTI-LOAD DC MICROGRID

Chen Jinghua; Huang Zehang; Yang Ling; Chen Yiqian; Liu Jiaxin; Ye Meiting

doi:10.19912/j.0254-0096.tynxb.2023-0453

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (7) : 294-302. DOI: 10.19912/j.0254-0096.tynxb.2023-0453

STABILITY MARGIN ANALYSIS AND OPTIMAL DESIGN METHOD OF CONTROL PARAMETERS FOR MULTI-SOURCE AND MULTI-LOAD DC MICROGRID

Chen Jinghua, Huang Zehang, Yang Ling, Chen Yiqian, Liu Jiaxin, Ye Meiting

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Abstract

In order to study the influence of multi-source and multi-load parameters on the stable operation of the system, a small-signal model of multi-source and multi-load DC microgrid is established in this paper. The voltage stability analysis is carried out based on the oscillation modes and participation factors of the system. The stability margin analysis of the system with the same kind of parameter coupling is carried out. When three power supply, a new pattern is discovered that the system stability margin is larger when the source-line length is “two long and one short” than when the source-line length is “two short and one long”. The interaction between the droop coefficient and the virtual inertia coefficient is explained in detail in the stability margin analysis under heterogeneous parameter. Based on the coupling interaction of multiple control parameters, the optimal design method of control parameters is proposed to achieve the maximum stability margin of the system and have the ability to provide greater inertia. Finally, the experimental results verify the correctness of the above analysis.

Key words

microgrids / DC-DC converters / stability / small-signal model / parameter optimization design

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Chen Jinghua, Huang Zehang, Yang Ling, Chen Yiqian, Liu Jiaxin, Ye Meiting. STABILITY MARGIN ANALYSIS AND OPTIMAL DESIGN METHOD OF CONTROL PARAMETERS FOR MULTI-SOURCE AND MULTI-LOAD DC MICROGRID[J]. Acta Energiae Solaris Sinica. 2024, 45(7): 294-302 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0453

References

[1] 付媛, 吴奇, 孙星, 等. 直流微电网中的虚拟储能与分区运行控制技术[J]. 太阳能学报, 2020, 41(5): 319-328.
FU Y, WU Q, SUN X, et al.Virtual energy storage and partition operation control technology in DC microgrid[J]. Acta energiae solaris sinica, 2020, 41(5): 319-328.
[2] PEI W, ZHANG X, DENG W, et al.Review of operational control strategy for DC microgrids with electric-hydrogen hybrid storage systems[J]. CSEE journal of power and energy systems, 2022, 8(2): 329-346.
[3] TABARI M, YAZDANI A.Stability of a DC distribution system for power system integration of plug-in hybrid electric vehicles[J]. IEEE transactions on smart grid, 2014, 5(5): 2564-2573.
[4] 张学, 裴玮, 邓卫, 等. 多源/多负荷直流微电网的能量管理和协调控制方法[J]. 中国电机工程学报, 2014, 34(31): 5553-5562.
ZHANG X, PEI W, DENG W, et al.Energy management and coordinated control method for multi-source/multi-load DC microgrid[J]. Proceedings of the CSEE, 2014, 34(31): 5553-5562.
[5] 赵卓立, 杨苹, 郑成立, 等. 微电网动态稳定性研究述评[J]. 电工技术学报, 2017, 32(10): 111-122.
ZHAO Z L, YANG P, ZHENG C L, et al.Review on dynamic stability research of microgrid[J]. Transactions of China Electrotechnical Society, 2017, 32(10): 111-122.
[6] SU M, LIU Z J, SUN Y, et al.Stability analysis and stabilization methods of DC microgrid with multiple parallel-connected DC-DC converters loaded by CPLs[J]. IEEE transactions on smart grid, 2018, 9(1): 132-142.
[7] 刘辉, 高舜安, 孙大卫, 等. 光伏虚拟同步发电机并网小信号稳定性分析[J]. 太阳能学报, 2021, 42(2): 417-424.
LIU H, GAO S A, SUN D W, et al.Small signal stability analysis of grid-connected photovoltaic virtual synchronous generators[J]. Acta energiae solaris sinica, 2021, 42(2): 417-424.
[8] SUN J.Impedance-based stability criterion for grid-connected inverters[J]. IEEE transactions on power electronics, 2011, 26(11): 3075-3078.
[9] POGAKU N, PRODANOVIC M, GREEN T C.Modeling, analysis and testing of autonomous operation of an inverter-based microgrid[J]. IEEE transactions on power electronics, 2007, 22(2): 613-625.
[10] 高阳, 徐国宁, 王生, 等. 平流层飞艇能源系统建模与小信号稳定性分析[J]. 太阳能学报, 2022, 43(8): 50-57.
GAO Y, XU G N, WANG S, et al.Modeling and small signal stability analysis of stratospheric airship energy system[J]. Acta energiae solaris sinica, 2022, 43(8): 50-57.
[11] ANAND S, FERNANDES B G.Reduced-order model and stability analysis of low-voltage DC microgrid[J]. IEEE transactions on industrial electronics, 2013, 60(11): 5040-5049.
[12] 朱晓荣, 李铮, 孟凡奇. 基于不同网架结构的直流微电网稳定性分析[J]. 电工技术学报, 2021, 36(1): 166-178.
ZHU X R, LI Z, MENG F Q.Stability analysis of DC microgrid based on different grid structures[J]. Transactions of China Electrotechnical Society, 2021, 36(1): 166-178.
[13] 王燕宁, 郭春义, 杨硕, 等. MMC系统稳定裕度随内环电流控制带宽的非单调变化特性及机理分析[J]. 中国电机工程学报, 2022, 42(10): 3538-3548.
WANG Y N, GUO C Y, YANG S, et al.Non-monotonic characteristics of stability margin of MMC system with the change of inner loop current control bandwidth and its mechanism analysis[J]. Proceedings of the CSEE, 2022, 42(10): 3538-3548.
[14] 吴琦, 邓卫, 谭建鑫, 等. 基于下垂控制的多端直流系统稳定性分析[J]. 电工技术学报, 2021, 36(S2): 507-516.
WU Q, DENG W, TAN J X, et al.Stability analysis of multi-terminal DC system based on droop control[J]. Transactions of China Electrotechnical Society, 2021, 36(S2): 507-516.
[15] 朱晓荣, 李铮. 多换流器直流微电网稳定性分析[J]. 电网技术, 2021, 45(4): 1400-1410.
ZHU X R, LI Z.Stability analysis of multi converter DC microgrid[J]. Power system technology, 2021, 45(4): 1400-1410.