Dynamic characteristic of HVDC reactive power and its influence on transient voltage stability of receiving-end power grid

作者：Yang, Huanhuan; Cai, Zexiang; Zhu, Lin; Feng, Lei; Jin, Xiaoming; Zhou, Baorong; Zhang, Donghui

来源：Electric Power Automation Equipment, 2017, 37(10): 86-92.

DOI：10.16081/j.issn.1006-6047.2017.10.013

• Critical clearing time
• Dynamic characteristics
• Evaluation index
• Influence mechanism
• Load transformations
• Reactive power balance
• Transient voltage stability
• Transmission characteristics

The dynamic characteristics of HVDC reactive power after large disturbances in AC system are thoroughly analyzed, and a new viewpoint of reactive power source-load transformation of HVDC is proposed. In the view of dynamic reactive power balance, the influence mechanism and approaches of HVDC reactive power source-load transformation on transient voltage stability of receiving-end power grid are analyzed, and an analytical method to quantitatively depict the dynamic characteristics of reactive power for HVDC in condition of stable critical transient voltage is proposed. On this basis, an analytic index to evaluate the influence of HVDC on transient voltage stability of receiving-end power grids is proposed, comprehensively considering the HVDC reactive power source-load transformation characteristics, transmission characteristics of reactive power network and voltage support strength of DC-link location. Compared with the results of critical clearing time index, simulative results of China Southern Power Grid verify the effectiveness and practicability of the proposed index.

• 出版日期2017-10-10
• 单位华南理工大学; 南方电网科学研究院有限责任公司