A categorization of converter station controllers within multi-terminal DC transmission systems

Irnawan, Roni; Silva, Filipe Miguel Faria da; Bak, Claus Leth; Bregnhøj, Tom Chresten

doi:10.1109/tdc.2016.7520039

Cited by 7 publications

(4 citation statements)

References 27 publications

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“…4. The data for the CIGRE model and the converter control system description can be found in [27,28] and table 5. The sampling frequency is 20 kHz, which is generally considered a low sample rate in comparison with the sample rates used in some other researches.…”

Section: The Test Systemmentioning

confidence: 99%

Analysis and validation of mathematical morphology filters for single-ended fault localization in VSC-HVDC links

Ashouri

Silva²,

Bak³

2021

Electr Eng

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Fast and accurate fault detection and localization are important topics in voltage source converter-based high voltage direct current transmission (VSC-HVDC) grids in order to isolate the fault after the first milliseconds of occurrence. Common signal-processing methods used for detecting fault traveling wave (TW) peaks like Fourier, S-transform and Wavelet-based techniques, transform the signal into the frequency domain, requiring complicated computations. In this paper, the application of mathematical morphology (MM)-based filters for detecting and locating faults in VSC-HVDC links are studied. MM-based methods analyze the signal in the time domain and detect the wave peaks accurately. Multiple MM-based filters resulted from basic MM operators are presented and used for TW-based fault study in VSCHVDC grids. Several fault cases are applied to the CIGRE VSC-HVDC model in PSCAD and the MMbased scripts are written in MATLAB. The impact of different size and type of the Structuring Element (SE) on the accuracy of peak detection is analyzed. The results show the accuracy of MM filters for detecting and locating fault transient in VSC-HVDC links. The proposed method gives accurate results for both low-impedance and high-impedance faults.

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Section: The Test Systemmentioning

confidence: 99%

Analysis and validation of mathematical morphology filters for single-ended fault localization in VSC-HVDC links

Ashouri

Silva²,

Bak³

2021

Electr Eng

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“…In a DC grid, the DC voltage can be considered as the power balance indicator [8]. The DC voltage is directly impacted when there is any deviation in the power flow within the DC grid.…”

Section: DC Grid Control Conceptmentioning

confidence: 99%

“…It should be noted that the DC voltage droop control mode is specific only for the MTDC system. A more advanced converter control can also be considered by activating different modes depending on the active power and DC voltage condition [8]. In this paper, only these basic converter modes are considered.…”

Section: DC Grid Control Conceptmentioning

confidence: 99%

“…Furthermore, there is resemblance between the DC voltage in DC system and AC frequency in AC system, i.e. controlling the DC system can be achieved by controlling the DC voltage [8]. Therefore, with this approach, each non-islanded converter is operated in UdcCtrl and the IFC generates a specific DC voltage reference for the converter, such that the measured active power and DC voltage of the converter lies along a predefined droop curve [4], [13].…”

Section: Multi-vendor With Primary Control Interface (Ifc)mentioning

confidence: 99%

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Enabling the Existing Point-to-Point VSC-HVDC Control for Multi-Terminal Operation

Irnawan

Silva

Bak

et al. 2019

2019 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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Existing point-to-point (PtP) VSC-HVDC link's control is usually not prepared for a multi-terminal HVDC (MTDC) operation, e.g. the DC voltage droop control might not exist in the PtP link or active power control might not exist in the offshore wind farm (OWF) link. Therefore, an existing PtP link's converter control needs to be adjusted when this link is expanded into an MTDC system by interconnecting new converters into the existing system. If only one vendor is involved in the MTDC system, these MTDC specific controls can be applied directly since the vendor has the knowledge of the installed system. However, if several converter vendors are involved, they need to define a common requirement and adjust their converters to fulfil this requirement. Another option is to implement the MTDC specific control as an extension of the existing converter control. The converter control is operated in DC voltage control, which is commonly found in every PtP link, and the extension gives the appropriate DC voltage reference such that the converter operating point lies along a predefined characteristic. Simulation results show that both implementation approaches can be adopted when a PtP link is expanded into an MTDC system, although each of them has different advantages.

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Introduction

Irnawan¹

2019

Planning and Control of Expandable Multi-Terminal VSC-HVDC Transmission Systems

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A categorization of converter station controllers within multi-terminal DC transmission systems

Cited by 7 publications

References 27 publications

Analysis and validation of mathematical morphology filters for single-ended fault localization in VSC-HVDC links

Analysis and validation of mathematical morphology filters for single-ended fault localization in VSC-HVDC links

Enabling the Existing Point-to-Point VSC-HVDC Control for Multi-Terminal Operation

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