DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support

Choongman Lee; Heejin Kim; Jae W. Shim; Kyeon Hur

doi:10.1109/ICPES47639.2019.9105659

DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support

Choongman Lee, Heejin Kim, Jae W. Shim, Kyeon Hur

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper presents an inertia emulation control method with the voltage droop strategy for voltage-sourced converter (VSC) based multi-terminal DC (MTDC) system. In the voltage droop strategy that all VSCs of MTDC system participate in the DC voltage control, the electro-static energy in MTDC capacitors cannot be delivered to a specific terminal: This may become an issue when the MTDC interconnects asynchronous AC power systems and one of the AC systems needs an immediate support from the MTDC. The proposed method aims to deliver the DC-link energy to one of the AC systems. This methodology is performed by adjusting the DC voltage reference depending on the frequency of each connected AC system. Subsequently, it improves the frequency stability of AC grid by utilizing the DC-link energy in MTDC system. The efficacy of the proposed method is demonstrated through PSCAD/EMTDC simulation studies for three-terminal DC system of Jeju Island in South Korea.

Original language	English
Title of host publication	2019 9th International Conference on Power and Energy Systems, ICPES 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728126586
DOIs	https://doi.org/10.1109/ICPES47639.2019.9105659
Publication status	Published - 2019 Dec
Event	9th International Conference on Power and Energy Systems, ICPES 2019 - Perth, Australia Duration: 2019 Dec 10 → 2019 Dec 12

Publication series

Name	2019 9th International Conference on Power and Energy Systems, ICPES 2019

Conference

Conference	9th International Conference on Power and Energy Systems, ICPES 2019
Country/Territory	Australia
City	Perth
Period	19/12/10 → 19/12/12

Bibliographical note

Funding Information:
This work was supported under the framework of international cooperation program managed by National Research Foundation of Korea (No. 2017K1A4A3013579).

Publisher Copyright:
© 2019 IEEE.

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology
Fuel Technology
Renewable Energy, Sustainability and the Environment
Electrical and Electronic Engineering
Control and Optimization

Access to Document

10.1109/ICPES47639.2019.9105659

Cite this

Lee, C., Kim, H., Shim, J. W., & Hur, K. (2019). DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support. In 2019 9th International Conference on Power and Energy Systems, ICPES 2019 [9105659] (2019 9th International Conference on Power and Energy Systems, ICPES 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICPES47639.2019.9105659

Lee, Choongman ; Kim, Heejin ; Shim, Jae W. ; Hur, Kyeon. / DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support. 2019 9th International Conference on Power and Energy Systems, ICPES 2019. Institute of Electrical and Electronics Engineers Inc., 2019. (2019 9th International Conference on Power and Energy Systems, ICPES 2019).

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title = "DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support",

abstract = "This paper presents an inertia emulation control method with the voltage droop strategy for voltage-sourced converter (VSC) based multi-terminal DC (MTDC) system. In the voltage droop strategy that all VSCs of MTDC system participate in the DC voltage control, the electro-static energy in MTDC capacitors cannot be delivered to a specific terminal: This may become an issue when the MTDC interconnects asynchronous AC power systems and one of the AC systems needs an immediate support from the MTDC. The proposed method aims to deliver the DC-link energy to one of the AC systems. This methodology is performed by adjusting the DC voltage reference depending on the frequency of each connected AC system. Subsequently, it improves the frequency stability of AC grid by utilizing the DC-link energy in MTDC system. The efficacy of the proposed method is demonstrated through PSCAD/EMTDC simulation studies for three-terminal DC system of Jeju Island in South Korea.",

author = "Choongman Lee and Heejin Kim and Shim, {Jae W.} and Kyeon Hur",

note = "Funding Information: This work was supported under the framework of international cooperation program managed by National Research Foundation of Korea (No. 2017K1A4A3013579). Publisher Copyright: {\textcopyright} 2019 IEEE.; 9th International Conference on Power and Energy Systems, ICPES 2019 ; Conference date: 10-12-2019 Through 12-12-2019",

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Lee, C, Kim, H, Shim, JW & Hur, K 2019, DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support. in 2019 9th International Conference on Power and Energy Systems, ICPES 2019., 9105659, 2019 9th International Conference on Power and Energy Systems, ICPES 2019, Institute of Electrical and Electronics Engineers Inc., 9th International Conference on Power and Energy Systems, ICPES 2019, Perth, Australia, 19/12/10. https://doi.org/10.1109/ICPES47639.2019.9105659

DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support. / Lee, Choongman; Kim, Heejin; Shim, Jae W.; Hur, Kyeon.

2019 9th International Conference on Power and Energy Systems, ICPES 2019. Institute of Electrical and Electronics Engineers Inc., 2019. 9105659 (2019 9th International Conference on Power and Energy Systems, ICPES 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Lee, Choongman

AU - Kim, Heejin

AU - Shim, Jae W.

AU - Hur, Kyeon

N1 - Funding Information: This work was supported under the framework of international cooperation program managed by National Research Foundation of Korea (No. 2017K1A4A3013579). Publisher Copyright: © 2019 IEEE.

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N2 - This paper presents an inertia emulation control method with the voltage droop strategy for voltage-sourced converter (VSC) based multi-terminal DC (MTDC) system. In the voltage droop strategy that all VSCs of MTDC system participate in the DC voltage control, the electro-static energy in MTDC capacitors cannot be delivered to a specific terminal: This may become an issue when the MTDC interconnects asynchronous AC power systems and one of the AC systems needs an immediate support from the MTDC. The proposed method aims to deliver the DC-link energy to one of the AC systems. This methodology is performed by adjusting the DC voltage reference depending on the frequency of each connected AC system. Subsequently, it improves the frequency stability of AC grid by utilizing the DC-link energy in MTDC system. The efficacy of the proposed method is demonstrated through PSCAD/EMTDC simulation studies for three-terminal DC system of Jeju Island in South Korea.

AB - This paper presents an inertia emulation control method with the voltage droop strategy for voltage-sourced converter (VSC) based multi-terminal DC (MTDC) system. In the voltage droop strategy that all VSCs of MTDC system participate in the DC voltage control, the electro-static energy in MTDC capacitors cannot be delivered to a specific terminal: This may become an issue when the MTDC interconnects asynchronous AC power systems and one of the AC systems needs an immediate support from the MTDC. The proposed method aims to deliver the DC-link energy to one of the AC systems. This methodology is performed by adjusting the DC voltage reference depending on the frequency of each connected AC system. Subsequently, it improves the frequency stability of AC grid by utilizing the DC-link energy in MTDC system. The efficacy of the proposed method is demonstrated through PSCAD/EMTDC simulation studies for three-terminal DC system of Jeju Island in South Korea.

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Lee C, Kim H, Shim JW, Hur K. DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support. In 2019 9th International Conference on Power and Energy Systems, ICPES 2019. Institute of Electrical and Electronics Engineers Inc. 2019. 9105659. (2019 9th International Conference on Power and Energy Systems, ICPES 2019). https://doi.org/10.1109/ICPES47639.2019.9105659

DC-Link Energy Control in Voltage Droop Strategy of Multi-Terminal DC System for AC Grid Frequency Support

Abstract

Publication series

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Bibliographical note

All Science Journal Classification (ASJC) codes

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