Non-inductive arc-suppression and active grounding compensation system based on master-slave inverters

作者：Chen, Zhongren^*; Zhang, Bo

来源：Electric Power Automation Equipment, 2014, 34(6): 62-66.

DOI：10.3969/j.issn.1006-6047.2014.06.011

• Active components
• Arc suppression
• Compensation systems
• Constant frequency
• Harmonic components
• Master slave
• Normal operations
• Single phase grounding faults

A non-inductive arc-suppression and active grounding compensation system based on master-slave inverters is designed to effectively compensate the active-power and harmonic components of grounding fault current, which is composed of a master inverter for compensating the fundamental and active components and a slave inverter for compensating the harmonic components. During normal operation, both constant frequency injection method and asymmetric voltage method are used to respectively measure the fundamental and active component of grounding fault current. When single-phase grounding fault occurs, the fault current at neutral point is detected and its harmonic component is extracted by FFT algorithm. The master and slave inverters are then quickly switched on to completely compensate the grounding fault current and keep the residual current at a lower level. The feasibility and effectiveness of the designed system are verified by computer simulations.

• 出版日期2014-6
• 单位华南理工大学