Active Support Control Strategy for Receiving-end of VSC-HVDC System Based on Reverse Mapping of Grid Frequency and DC Voltage

DONG Chenjie; LI Ming; ZHAO Xibei; ZHAO Chengyong; MA Xiuda

doi:10.13334/j.0258-8013.pcsee.250646

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Active Support Control Strategy for Receiving-end of VSC-HVDC System Based on Reverse Mapping of Grid Frequency and DC Voltage

更新时间：2026-10-12

- Active Support Control Strategy for Receiving-end of VSC-HVDC System Based on Reverse Mapping of Grid Frequency and DC Voltage
- Vol. 46, Issue 9, Pages: 3828-3840(2026)
- 作者机构：
  
  1. 1 新能源电力系统全国重点实验室(华北电力大学)，北京市昌平区,102206
  2. 2 国网经济技术研究院有限公司，北京市昌平区,102209
  3. 3 南京南瑞继保电气有限公司,江苏省,南京市,211102
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.250646
  CLC：
- Received：05 May 2026，
  
  Published：2026
- 稿件说明：
移动端阅览
DONG Chenjie, LI Ming, ZHAO Xibei, et al. Active Support Control Strategy for Receiving-end of VSC-HVDC System Based on Reverse Mapping of Grid Frequency and DC Voltage[J]. 2026, 46(9): 3828-3840.
DOI：

DONG Chenjie, LI Ming, ZHAO Xibei, et al. Active Support Control Strategy for Receiving-end of VSC-HVDC System Based on Reverse Mapping of Grid Frequency and DC Voltage[J]. 2026, 46(9): 3828-3840. DOI： 10.13334/j.0258-8013.pcsee.250646.

摘要

新能源经柔性直流输电送出为未来发展趋势，但其通常无法为电网提供频率支撑。现有理论研究大多采用降低直流电压的方式向送端反映电网频率下降信息，然而，此时桥臂电流上升较快，易达到绝缘栅双极晶体管电流限值。为此，文中提出一种电网频率-直流电压反向映射的主动支撑控制策略。所提策略通过两端的子模块能量定额控制和桥臂电压限幅控制，避免柔直系统在直流升压过程中对有功功率的挤占，在传递电网频率下降信息的同时，能够有效抑制桥臂电流的增长，提升柔直功率传输的上限，有效增强新能源经柔直送出系统支撑电网的能力与电网频率稳定性。最后，基于PSCAD/EMTDC建立光伏孤岛经柔直系统送出模型，对主动支撑控制策略在负荷突增工况下的惯量响应以及频率支撑效果进行分析，验证该策略的有效性。

Abstract

The transmission of new energy through voltage source converter based high voltage DC (VSC-HVDC) is a future development trend

but it generally fails to offer frequency support for the power grid. Conventional methods lower DC voltage to signal frequency drops

which may overload IGBTs due to rapidly rising arm currents. This paper proposes an active frequency support control strategy based on a reverse frequency-DC voltage mapping mechanism. The strategy prevents active power encroachment during DC boosting via dual-terminal submodule energy control and arm voltage clamping. While conveying grid frequency drop information

it suppresses arm current growth

enhances flexible DC transmission capacity

and significantly strengthens both the grid-support capability of renewable energy delivery systems via flexible DC and grid frequency stability. Based on PSCAD/EMTDC

a photovoltaic island transmission model is established through a VSC-HVDC system. Tests under load surge scenarios demonstrated its effectiveness in delivering inertial response and dynamic frequency regulation.

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