Research on the New Topology and Coordinated Control Strategy of Renewable Power Generation Connected MMC-Based DC Power Grid Integration System

被引：4

作者：

Wang, Shanshan ^{[1
]}

Qin, Shanmeng ^{[2
]}

Yang, Panbo ^{[2
]}

Sun, Yuanyuan ^{[2
]}

Zhao, Bing ^{[1
]}

Yin, Rui ^{[2
]}

Sun, Shengya ^{[2
]}

Tian, Chunyi ^{[2
]}

Zhao, Yuetong ^{[2
]}

机构：

[1] China Elect Power Res Inst, Beijing 100192, Peoples R China

[2] Shandong Univ, Sch Elect Engn, Jinan 250061, Peoples R China

来源：

SYMMETRY-BASEL | 2021年 / 13卷 / 10期

关键词：

coordinated control strategy; islanded renewable energy generation integration system; MMC-based DC power grid; overvoltage and overcurrent; VOLTAGE;

D O I：

10.3390/sym13101965

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The modular multilevel converter (MMC) station connected to the islanded renewable energy generation system needs to adopt the voltage frequency (VF) control to provide AC voltage. The single-pole converter fault will unbalance the input and output power of the DC power grid, which causes the DC voltage or the bridge arm current of the non-fault pole to exceed the protection value in the time scale of tens to hundreds of milliseconds, leading to cascading failures. To realize the fault ride-through (FRT) of single-pole converter fault, this paper analyzes the electrical characteristic of the system. Based on the analysis, the existing topology is optimized and the reasonable operation reserved margin is designed. Furthermore, the corresponding control strategy is proposed, which can not only ensure the single-pole converter block fault ride-through but can also realize economic, stable, and resilient power supply and address asymmetrical problems. Finally, the simulation model is built in PSCAD/EMTDC and the simulation results validate the effectiveness of the proposed control strategy.</p>

引用

页数：14

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