DC grid control through the pilot voltage droop concept: Mitigating consequences of time delays

Berggren, Bertil; Majumder, Ritwik; Lindén, Kerstin

doi:10.1109/powereng.2015.7266307

Cited by 9 publications

(7 citation statements)

References 8 publications

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“…A disadvantage compared to a local voltage based droop control, is the need for communication. An extension is presented in [33] where the consequences of time delays are considered for the pilot voltage control approach. The delay is considered by dividing the feedback signal into the local voltage with full dynamic content together with the second correction term.…”

Section: B Common Voltage Feedback Signalmentioning

confidence: 99%

Current Sharing in Multiterminal DC Grids—The Analytical Approach

Eriksson¹

2018

IEEE Trans. Power Syst.

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Section: B Common Voltage Feedback Signalmentioning

confidence: 99%

Current Sharing in Multiterminal DC Grids—The Analytical Approach

Eriksson¹

2018

IEEE Trans. Power Syst.

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“…The main drawback of pilot voltage droop control is its dependency on communication system. In [39], [40] methods to mitigate communication latencies and outage were proposed by combining local and common measurements to get more reliable control.…”

Section: DC Voltage Measurement Locationmentioning

confidence: 99%

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

Irnawan

Silva

Bak

et al. 2016

2016 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)

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Abstract-As more and more VSC-HVDC links are planned and commissioned, interconnection of neighboring links or connection to an existing link becomes a feasible step towards secure and reliable multi-terminal DC (MTDC) transmission systems. Multi-vendor MTDC (MV-MTDC) operation is anticipated as an impact of this gradual DC grids development. In order to achieve certain operation conditions, DC grid controller needs to send specific control settings to individual converter station controls. One of the challenges in MV-MTDC transmission systems occurs in coordination of converters since different types of controller might exist in the same system. It is therefore important to identify the parameters required by the converter station controllers to ensure a smooth coordination. In this paper, different converter station controllers available in the literatures are categorized. Challenges of converter station control coordination are also discussed.

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“…The reliability and stability of the MTDC can be reinforced by distributed droop control as multiple VSCs contribute to voltage regulation and power sharing [15], [16], [19]. There are two kinds of DC voltage droop control, namely, local voltage droop control [13]- [15] and pilot voltage droop control (PVDC) [20]- [22]. The power sharing of PVDC does not rely on local voltage following a disturbance.…”

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confidence: 99%

Adaptive Voltage Reference Based Controls of Converter Power Sharing and Pilot Voltage in HVDC System for Large-Scale Offshore Wind Integration

Zhang,

Qian,

Shao

et al. 2024

IEEE Open J. Power Energy

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Active power sharing and voltage regulation are two of the major control challenges in the operation of the voltage source converter based multi-terminal high-voltage DC (VSC-MTDC) system when integrating large-scale offshore wind farms (OWFs). This paper proposes two novel adaptive voltage reference based droop control methods to regulate pilot DC voltage and share the power burden autonomously. The proposed Method I utilizes DC grid lossy model with the local voltage droop control strategy, while the proposed Method II adopts a modified pilot voltage droop control (MPVDC) to avoid the large errors caused by the DC grid lossless model. Dynamic simulations of a five-terminal MTDC grid are carried out using MATLAB/Simulink SimPowerSystems /Specialized Technology to verify the proposed autonomous control methods under various types of disturbance and contingency. In addition, comparative study is implemented to demonstrate the advantages of the proposed methods. Index Terms-Adaptive voltage reference based droop, autonomous control, offshore wind farms (OWFs), power sharing, power-voltage droop control, voltage regulation, voltage source converter based multi-terminal high-voltage DC (VSC-MTDC). I. INTRODUCTIONACING finite fossil fuels and worldwide appeal for cutting down greenhouse gas emission, the past twenty years witness a continuous growing share of the sustainable energies in the power generation mix [1]- [3]. As one of the mainstream renewable energy technologies, offshore wind generation is growing rapidly in many countries in Europe, North America, and Asia [4], [5]. There are two feasible technologies to integrate the offshore wind farms into an existing AC system, i.e. high voltage ac grid and voltage source converter based high-voltage DC (VSC-HVDC) grid. However, the advantages of independent control of the active and reactive powers, undersea connection, as well as power flow redirection capability make HVDC grid, i.e. multiterminal HVDC (MTDC) system, a preferable solution to integrate offshore wind farms [1], [6]- [9].The classical VSC control schemes for MTDC system can be categorized into three types: V-P control [10], voltage

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DC grid control through the pilot voltage droop concept: Mitigating consequences of time delays

Cited by 9 publications

References 8 publications

Current Sharing in Multiterminal DC Grids—The Analytical Approach

Current Sharing in Multiterminal DC Grids—The Analytical Approach

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

Adaptive Voltage Reference Based Controls of Converter Power Sharing and Pilot Voltage in HVDC System for Large-Scale Offshore Wind Integration

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