Coordinated optimal configuration of grid-forming inverters and STATCOMs for enhancing transient voltage security of regional power grid

Authors

• Xiaofeng YU, Heyuan Power Supply Bureau, Guangdong Power Grid Co., Ltd., Guangzhou 517000, China
• Ronghao TAN, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
• Binbin TANG, Heyuan Power Supply Bureau, Guangdong Power Grid Co., Ltd., Guangzhou 517000, China
• Shunjiang LIN, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, ChinaFollow
• Ye CHENG, Heyuan Power Supply Bureau, Guangdong Power Grid Co., Ltd., Guangzhou 517000, China
• Weikun LIANG, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China

Keywords

transient voltage security; low voltage ride through; grid-forming inverters; STATCOM; fourth-orderimplicit Adams method

Abstract

At present, renewable energy stations in a regional power grid mainly adopt grid-following control. Since it has the current source control characteristic and does not have the voltage support capability similar to that of traditional synchronous generators, it will reduce the transient voltage security of the regional power grid. When short circuit faults occur or the impact loads start up frequently in the regional power grid, it is more likely to result in the transient voltage instability and thus affect the secure and reliable power supply to users. In response, a coordinated optimal configuration model of grid-forming inverters and static synchronous compensators (STATCOMs) is established to enhance the transient voltage security of regional power grids. The objective function is to minimize the investment costs, and transient safety constraints are required to be satisfied when the system is subjected to a short circuit fault or impact load startup. It is also required to ensure that the output current of the grid-forming inverters in renewable energy stations does not exceed the secure limit during the transient process, thereby achieving low voltage ride through. To solve the optimization model with differential equation constraints quickly and accurately, a fourth-order implicit Adams method based on fast startup is proposed, which reduces the number of differential periods in the startup of the traditional fourth-order implicit Adams method, and transforms the differential equation constraints into a smaller number of algebraic equation constraints, so that the optimization model can be solved quickly and accurately. Finally, a case study on an actual regional power grid verifies the effectiveness of the proposed optimal configuration model and solution algorithm.

DOI

10.19781/j.issn.1673-9140.2026.02.006

First Page

64

Last Page

78

Recommended Citation

YU, Xiaofeng; TAN, Ronghao; TANG, Binbin; LIN, Shunjiang; CHENG, Ye; and LIANG, Weikun (2026) "Coordinated optimal configuration of grid-forming inverters and STATCOMs for enhancing transient voltage security of regional power grid," Journal of Electric Power Science and Technology: Vol. 41: Iss. 2, Article 6.
DOI: 10.19781/j.issn.1673-9140.2026.02.006
Available at: https://jepst.researchcommons.org/journal/vol41/iss2/6