| 引用本文: | 李景一,李浩志,尹聪琦,谢小荣,杨建军,王克.基于附加频变增益控制的风电-柔性直流输电系统次同步振荡抑制方法[J].电力自动化设备,2022,42(8): |
| LI Jingyi,LI Haozhi,YIN Congqi,XIE Xiaorong,YANG Jianjun,WANG Ke.Sub-synchronous oscillation mitigation method of wind power-flexible DC transmission system based on supplementary frequency dependent gain control[J].Electric Power Automation Equipment,2022,42(8): |
|
| 摘要: |
| 针对风电-柔性直流输电系统动态相互作用引发的次同步振荡(SSO)问题，提出了一种基于附加频变增益(SFDG)控制的SSO抑制策略。基于阻抗理论揭示了风电-柔性直流输电系统SSO的发生机理；采用参数灵敏度分析从多个变流控制环节中优选出施加SFDG控制的最佳位置；将SFDG控制设计规范为多工况约束优化问题并求解实现其参数优化；通过对比施加SFDG控制前、后系统聚合阻抗的频率特性变化，从理论上说明SFDG控制的原理和作用。通过电磁暂态仿真验证了单一和2个SFDG控制的SSO抑制效果。 |
| 关键词: 风电-柔性直流输电系统 次同步振荡 附加频变增益控制 参数优化 振荡抑制 |
| DOI：10.16081/j.epae.202202011 |
| 分类号:TM614;TM712 |
| 基金项目:国家自然科学基金资助项目(51737007,51925701)；清华大学-新南威尔士大学自主科研国际合作专项(2020Z02NSW)；中国电建集团华东勘测设计研究院科技项目(KY2020-XNY-02-02) |
|
| Sub-synchronous oscillation mitigation method of wind power-flexible DC transmission system based on supplementary frequency dependent gain control |
|
LI Jingyi1,2, LI Haozhi2, YIN Congqi2, XIE Xiaorong2, YANG Jianjun1, WANG Ke1
|
|
1.Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province, Power China Huadong Engineering Corporation Limited, Hangzhou 311112, China;2.State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
|
| Abstract: |
| Aiming at the SSO(Sub-Synchronous Oscillation) problem caused by dynamic interaction between wind power and flexible DC transmission system, a SSO mitigation strategy based on SFDG(Supplementary Frequency Dependent Gain) control is proposed. Based on impedance theory, the mechanism of SSO in wind power-flexible DC transmission system is revealed. The optimal positions for applying SFDG controls are selected from multiple converter control loops by using parameter sensitivity analysis. By comparing the frequency characteristics of system’s polymerization impedance before and after applying SFDG control, the principle and function of SFDG control are explained theoretically. The SSO mitigation effects of single SFDG control and two SFDG controls are verified by electromagnetic transient simulation. |
| Key words: wind power-flexible DC transmission system sub-synchronous oscillation supplementary frequency dependent gain control parameter optimization oscillation mitigation |
