特高压直流输电控制与保护技术的研究

Study on the control and protection system of ultra high voltage direct current transmission

随着特高压大电网和交直流并网的开展,直流输电技术逐渐被广泛应用在实际工程中。在直流输电系统和换流技术研究的基础上,结合云广±800kV特高压直流输电工程,系统地介绍了直流输电控制保护系统的分层冗余结构以及不同故障对应的保护措施,并提出了直流输电工程中存在的问题和解决方案。特高压直流输电控制保护系统的研究对特高压大电网和交直流并网的可靠、有效运行具有十分重大的意义。

With the development of the ultra high-voltage transmission network and AC-DC merging into the network, ultra high voltage direct current （UHVDC） transmission technology is widely used in practical engineering. Based on the DC transmission system and the conversion between AC and DC by considering _＋ 800 kV Yun-Guang project, the paper systematically introduces the redundant and hierarchical structure and protection measures corresponding different faults of the control and protection system of UHVDC.Then it brings forward the problems and solutions of a UHVDC project. The study is great significant to the high-voltage transmission network and AC-DC merging into the network.