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首页> 外文会议>International Conference on Power Electronics and ECCE Asia >Active Current-Limiting Control to Handle DC Line Fault of Overhead DC Grid
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Active Current-Limiting Control to Handle DC Line Fault of Overhead DC Grid

机译：有源限流控制处理架空直流电网的直流线路故障

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摘要

To handle with the DC line faults in a DC grid, this paper proposed an active current-limiting controller for hybrid MMC. With this active current-limiting control strategy, the requirement of interruption current of DCCB will be significantly decreased, and the investment of DC grid will be reduced obviously. Firstly, the control architecture of active current-limiting controller is disclosed. To avoid the overvoltage of submodule capacitors during DC fault, a dynamic limiter for the reference value of the DC current controller is proposed. To decrease the peak of fault current, the feedforward controller of DC voltage is put forward. The decoupling controllability of the AC/DC voltage of hybrid MMC is disclosed. The current-limiting mechanism of the active current-limiting controller is analysis. Then, the validity of the active current-limiting control strategy is verified by RTDS.
机译：为了处理直流电网中的直流线路故障，本文提出了一种用于混合MMC的有源限流控制器。采用这种主动限流控制策略，将大大降低DCCB的中断电流要求，并明显减少DC电网的投资。首先，公开了有源限流控制器的控制架构。为了避免子模块电容器在直流故障期间过电压，提出了一种用于直流电流控制器参考值的动态限制器。为了减小故障电流的峰值，提出了直流电压的前馈控制器。公开了混合MMC的AC / DC电压的解耦可控性。有源限流控制器的限流机制为分析。然后，通过RTDS验证了有源限流控制策略的有效性。

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