电网技术2024，Vol.48Issue(7)：3067-3074,中插116,9.DOI:10.13335/j.1000-3673.pst.2023.1082
柔性直流系统自适应惯性和阻尼模拟的自同步解耦控制策略
Self Synchronous Decoupling Control for Adaptive Inertia and Damping Simulation of MMC-HVDC Systems
摘要
Abstract
Aiming at the frequency instability caused by the low inertia characteristics of an electronic power system,this paper quantitatively analyzes the available energy of a MMC-HVDC system and its feasibility in actively supporting the system inertia from the perspective of exploring the regulation potential of the power grid transmission link.A self synchronization control strategy for the receiving end converter station that takes into account the capacitor energy margin is proposed,which achieves the self synchronization without the phase-locked loop and actively supports the inertia of the receiving end power grid.On this basis,considering the impact of the DC voltage safety constraints on the utilization of capacitor energy margin,a self synchronous decoupling control strategy and the parameter design method for adaptive inertia and damping simulation of MMC-HVDC systems are suggested.Through adaptively adjusting the inserted number of the sub-modules and the Moment of inertia,the capacity of the inertia support is further improved by using the capacitor energy margin.By introducing the damping control,the frequency deviation adjustment is achieved while improving the stability of the control system.The effectiveness of the proposed control strategy is verified through the real-time digital simulation.关键词
柔性直流输电/自同步控制/频率响应/惯性与阻尼模拟/自适应调制Key words
MMC-HVDC/self synchronous control/frequency response/inertia and damping simulation/adaptive modulation分类
信息技术与安全科学引用本文复制引用
江守其,李卓易,李国庆,辛业春,王丽馨..柔性直流系统自适应惯性和阻尼模拟的自同步解耦控制策略[J].电网技术,2024,48(7):3067-3074,中插116,9.基金项目
吉林省科技发展计划项目(20220508014RC).Project Supported by Jilin Provincial Science and Technology Development Plan Under Grant(20220508014RC). （20220508014RC）
