Preprint Article Version 1 This version is not peer-reviewed

Active Power Tracking Control Strategy to Suppress DC-Link Voltage Rising with Enhanced Fault Ride-Through Capability using Superconducting Fault Current Limiter

Version 1 : Received: 25 April 2019 / Approved: 26 April 2019 / Online: 26 April 2019 (10:03:30 CEST)

How to cite: Choi, S.; Lim, S. Active Power Tracking Control Strategy to Suppress DC-Link Voltage Rising with Enhanced Fault Ride-Through Capability using Superconducting Fault Current Limiter. Preprints 2019, 2019040294 (doi: 10.20944/preprints201904.0294.v1). Choi, S.; Lim, S. Active Power Tracking Control Strategy to Suppress DC-Link Voltage Rising with Enhanced Fault Ride-Through Capability using Superconducting Fault Current Limiter. Preprints 2019, 2019040294 (doi: 10.20944/preprints201904.0294.v1).

Abstract

Building a new power plant to address the growing demand for power due to population concentration in the metropolitan area is one of the world's major concerns. However, since a large power plant can not be located around the city due to burden of economic cost, building power plant outside metropolitan and cities is necessary. Therefore, new power generation facilities are promoting policies to provide distributed generator(DG) with a small capacity relatively near the metropolitan. When the DG (photovoltaic, wind farm, etc.) is connected with the grid using medium voltage direct current (MVDC) system, voltage sourced converter(VSC) should supply reactive power to the grid, because of fault ride through(FRT) operation in grid fault. If the voltage drop is severe, the converter should be disconnected from the grid immediately without supplying the reactive power, resulting in a considerable economic loss. In general, superconducting fault current limiter(SFCL) is introduced as a measure to enhance FRT capability. In this paper, we use trigger type SFCL which protects superconducting element and reduces low voltage. On the other hand, the active power unbalance of the DC-link and the DC voltage rise due to the reactive power supply of the grid-side converter. The rise of the DC voltage causes the P (active power), Q (reactive power) control of the converter to deviate, causing malfunction and damage of the DC equipment. Therefore, the rise of the DC voltage must be prevented. In this paper, we consider the suppression the DC voltage rising caused by the FRT operation through the active power tracking control (APTC).

Subject Areas

distributed generator (DG); medium voltage direct current (MVDC) system; voltage sourced converter (VSC); fault ride-though (FRT); trigger type superconducting fault current limiter (SFCL); active power tracking control (APTC)

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.