HVDC grid control system based on autonomous converter control

Barnes, Michael; Beddard, Antony; Barker, Carl; Adamczyk, A.

doi:10.1049/cp.2016.0261

Cited by 6 publications

(16 citation statements)

References 12 publications

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“…The optimal power flow (OPF) solver has widely been proposed in the literature as a hierarchical secondary control layer for MTDC systems [12]- [14], [19]. A hierarchical control algorithm referred to as a Power Flow Solver (PFS) is proposed and analyzed in [14]. A basic control block diagram of MTDC system with PFS is given in Fig.…”

Section: Power Flow Solvermentioning

confidence: 99%

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Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Shah¹,

Barnes²,

Preece³

2019

15th IET International Conference on AC and DC Power Transmission (ACDC 2019)

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Multi-terminal DC (MTDC) grids are becoming increasingly popular for interconnecting non-synchronous generating resources such as offshore wind power plants (WPPs). The benefit of MTDC systems is that they can be reconfigured during contingencies to maintain the supply of power to the host AC systems. DC grid reconfiguration in MTDC systems will inevitably change the power injections to the host AC system, and will thus affect the dynamic behaviour of the AC system. This paper investigates the dynamic behaviour of the representative Great British (GB) transmission system (i.e. a reduced order dynamic model) for a series of reconfigurations in a meshed MTDC grid connecting offshore WPPs to the system. Hierarchical control strategies for the MTDC system including a DC power flow solver (PFS) and pilot voltage droop (PVD) are compared. From the analysis, it is observed that the reconfiguration of MTDC grid has a notable impact on large-disturbance dynamics of the GB transmission system.

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Section: Power Flow Solvermentioning

confidence: 99%

“…The OPF based secondary controller has been used as a supplementary controller to adjust the reference points of the primary droop controllers. A similar idea has been proposed in [14], and the performances are assessed for various droop characteristics and converter outage cases with simple AC systems.…”

Section: Introductionmentioning

confidence: 99%

Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Shah¹,

Barnes²,

Preece³

2019

15th IET International Conference on AC and DC Power Transmission (ACDC 2019)

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“…The configuration of the NAWC is shown in Figure 5 [14]. All of the VSCs have a power rating of 1GW and a nominal DC voltage of 600kV.…”

Section: Impact Of Parameter Uncertainty On Nawcmentioning

confidence: 99%

“…This gain was selected to prevent the DC voltages from exceeding their normal operating range by ±2% [14]. The series resistance of the DC cables is approximately 0.0113Ω/km with a shunt conductance of 10 -7 S/km [15].…”

Section: Impact Of Parameter Uncertainty On Nawcmentioning

confidence: 99%

“…Figure 6 shows that the impact of the DC voltage measurement systems' accuracy decreases as the droop gains increase, and that the power flow error is still significant when large droop gains and very accurate DC voltage measurements are employed. An EMT model based on the NAWC was implemented in [14]. In this model, the VSCs are represented using average value models based on a half-bridge MMC and the DC cables are represented using the frequency dependent phase cable model.…”

Section: Impact Of Droop Gain and DC Voltage Measurement Errormentioning

confidence: 99%

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Impact of Parameter Uncertainty on Power Flow accuracy in multi-terminal systems

Beddard

Wang

Barnes

et al. 2016

2016 IEEE Power and Energy Society General Meeting (PESGM)

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Abstract-Accurate power flow in a MT system can be achieved with droop controllers. However, almost all publications have assumed that the DC voltage, DC current and DC cable resistances can be measured with 100% accuracy. In this paper, a novel power flow solver is developed which enables the user to analyse the impact of these parameters on power flow accuracy. The developed Parameter Uncertainty Power Flow Solver (PU-PFS) is shown to be able to accurately calculate the power flow error for hundreds of parameter uncertainty scenarios in less than a second. The PU-PFS is employed to investigate the impact of parameter uncertainty on a potential MT system and the results show that realistic measurement errors (0.2%) can result in significant power flow error (>150MW). Finally, the paper assesses the key factors which influence the power flow accuracy resulting in a number of important conclusions.

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A Realistic Telecommunication Model for Electromagnetic Transient Simulations and Control Assessment of Multi-Terminal VSC-HVDC Networks in PSCAD/EMTDC

Carmona-Sanchez¹,

Green²,

Barnes³

et al. 2019

15th IET International Conference on AC and DC Power Transmission (ACDC 2019)

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A telecommunication system is vital for the operation and control of large electric power systems such as present and future multi-terminal HVDC networks. The latency in data transmission, and the variation in latency, known as jitter, are one of the most important features, in addition to reliability and security, to be considered in the modelling of telecommunication networks when assessing the overall performance of electric power systems. Further, in switched packet telecommunication systems, such as the internet, data packets arriving out of order might occur. Based on the behaviour of switched telecommunication networks and considering the latency as the main component to be represented, in this paper, a telecommunication model is developed and a user defined component is built in PSCAD/ EMTDC using the FORTRAN 90 language. Such a model is suitable to represent telecommunication networks with variable and constant latency as well as switched packet telecommunication systems, i.e. the internet and telephone networks. Results obtained from the application of the telecommunication model to the control a multi-terminal VSC HVDC network, interfacing offshore wind power generation, are then presented and discussed in the paper.

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HVDC grid control system based on autonomous converter control

Cited by 6 publications

References 12 publications

Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Impact of Parameter Uncertainty on Power Flow accuracy in multi-terminal systems

A Realistic Telecommunication Model for Electromagnetic Transient Simulations and Control Assessment of Multi-Terminal VSC-HVDC Networks in PSCAD/EMTDC

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