Novel reactive-power-compensation scheme for the Jeju-Haenam HVDC system

Jang, Gilsoo; Oh, Sangwook; Han, Byung-Moon; Kim, C.K.

doi:10.1049/ip-gtd:20059004

Cited by 22 publications

(9 citation statements)

References 5 publications

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“…Although voltage-source converters (VSCs) have been used in HVDC systems, line-commutated converter (LCC) schemes are also advantageous because they are a mature technology and are available at higher capacities for HVDC systems than current VSCs [2]. Based on these advantages, the 180-kV, 300-MW LCC-HVDC system installed by Korea Electric Power Corporation (KEPCO) has been used to convey relatively cheap electrical power from the Haenam substation on the Korean mainland to the Jeju substation on Jeju Island, via 100-km undersea cables [3].…”

Section: Introductionmentioning

confidence: 99%

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

et al. 2017

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Abstract:A new modeling method for high voltage direct current (HVDC) systems and associated controllers is presented for the power system simulator for engineering (PSS/E) simulation environment. The aim is to improve the estimation of the transient DC voltage and current in the event of an AC line-to-ground fault. The proposed method consists primary of three interconnected modules for (a) equation conversion; (b) control-mode selection; and (c) DC-line modeling. Simulation case studies were carried out using PSS/E and a power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC) model of the Jeju-Haenam HVDC system in Korea. The simulation results are compared with actual operational data and the PSCAD/EMTDC simulation results for an HVDC system during single-phase and three-phase line-to-ground faults, respectively. These comparisons show that the proposed PSS/E modeling method results in the improved estimation of the dynamic variation in the DC voltage and current in the event of an AC network fault, with significant gains in computational efficiency, making it suitable for real-time analysis of HVDC systems.

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Section: Introductionmentioning

confidence: 99%

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

et al. 2017

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“…2 also shows that ΔIdcr and ΔVdci in (2) and (3) can be calculated using ΔVdcr and ΔIdci of the DC line. Using the equations for Δα, Δγ, ΔIdcr, and ΔVdci provided in Appendix A, (2) and (3) can be converted to (4) and (5), which are expressed in the frequency domain s. By using additional equations to express the differentials of H, Y, U, and Z (see Appendix B), (4) and (5) can be divided into multiple first-order differential equations, which are in a matrix form as: (6) This procedure is comprehensively explained in Appendix B. From (6), the state space model of the LCC HVDC system with the proposed control method is represented by:…”

Section: A State Space Model For the Proposed Control Methodsmentioning

confidence: 99%

“…Among these applications, regulating DC power delivery for frequency control is particularly important for the stable and efficient operation of transmission networks. For example, a 184-kV 150-MW LCC-HVDC system was installed by the Korea Electric Power Corporation (KEPCO) to convey electrical power from the Haenam Substation on the Korean mainland to the Jeju Substation on Jeju Island, via 100-km undersea cables [6]. It has been recently retrofitted with the additional capability to control DC power for frequency regulation in the Jeju Island network [7].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Kwon

Kim

Moon

2018

IEEE Trans. Power Delivery

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“…The AC/DC power system shown in Figure 10 is a simplified model of an island grid fed by a 300 MW HVDC system [28]. The selected information on the system is summarized in Table 1.…”

Section: Ac/dc Power Systemmentioning

confidence: 99%

A Co-Simulation Framework for Power System Analysis

Chae

2016

Energies

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Power system electromagnetic transient (EMT) simulation has been used to study the electromagnetic behavior of power system components. It generally comprises detailed models of the study area and an equivalent circuit which represents an external part of the study area. However, a detailed description of an external system that includes transmission or distribution system models is required to study the interaction among power system components because the number of high power converter based devices in a power grid have been increasing. Since detailed models of the system components are necessary to simulate a series of events such as cascading faults the computational burden of power system simulation has increased. Therefore a more effective and practical framework has been sought to handle this computational challenge. This paper proposes a co-simulation framework including a delay compensation algorithm to compensate the time delayed signals due to network segmentation and a fast and flexible simulation environment composed of non-real time power system EMT simulation on a general purpose computer with a multi core central processing unit (CPU), which is currently very popular owing to its performance. The proposed methods are applied to an AC/DC power system model.

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Novel reactive-power-compensation scheme for the Jeju-Haenam HVDC system

Cited by 22 publications

References 5 publications

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

A Co-Simulation Framework for Power System Analysis

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