Case Study of a Multi-Infeed HVDC System

Toledo, P.F. de; Pan, Jiuping; Srivastava, K. N.; Wang, Weiguo; Chen, Hong

doi:10.1109/icpst.2008.4745240

Cited by 16 publications

(6 citation statements)

References 2 publications

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“…In the time‐domain simulation of the study case, this assumption will be relieved. (ii) In the studied receiving system, there exists at least one fault that will cause commutation failure in all the DC links fed into the receiving system simultaneously. This assumption holds in a small‐scale receiving system such as Jeju island power system [10, 11], or in a large‐scale multi‐infeed receiving system where the inverters are closely interacted such as Guangdong grid in China Southern Power Grid [12]. In other cases, although commutation failure may not be caused in all the DC links fed into the receiving system simultaneously, severe AC faults will still result in a large deficit of the DC power in the receiving grid.…”

Section: Modelling and Assumptionsmentioning

confidence: 99%

Critical receiving power ratio of the receiving system in asynchronously connected power systems based on voltage response analysis

Song

Huang³

2016

IET Generation, Transmission & Distribution

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The objective of this study is to determine the critical receiving power ratio (CRPR) of a receiving system fed only by high-voltage DC transmission lines. The approach is to check the voltage response when a severe fault occurs in a simplified asynchronously connected receiving system. The DC power limit is found by continuously increasing the DC power until the voltage cannot recover from the severe fault. The topic is expanded as follows. First, a simplified system model is established under a few reasonable assumptions. Then, the analytical voltage response expressions when a three-phase short-circuit fault occurs are developed, taking the effect of commutation failure, fast AC voltage control and load characteristics into consideration. The expressions of the DC power limits under different load characteristics are deduced from the analytical voltage response expressions. Besides, several crucial factors that limit the infeed power capacity of an asynchronously connected receiving system are discussed in this study based on the sensitivity analysis of the DC power limits. The CRPRs of a receiving system with different crucial characteristics are found through time-domain simulation with detailed models. The validity of the analytical voltage response expressions and the crucial factor analysis is well proved by the simulation results.

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Section: Modelling and Assumptionsmentioning

confidence: 99%

Critical receiving power ratio of the receiving system in asynchronously connected power systems based on voltage response analysis

Song

Huang³

2016

IET Generation, Transmission & Distribution

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“…Several publications have developed and tested controllers to enable inertial response on HVDC systems [6][7][8][9]. HVDC for primary frequency control has been considered in several publications [10], [11], and the coordinated primary frequency control among nonsynchronous systems connected by a multi-terminal HVDC grid has been studied in [12]. In addition, the problem of providing frequency control services, including inertia emulation and primary frequency control, from offshore wind farms connected through a MTDC network has been studied in [13].…”

Section: Introductionmentioning

confidence: 99%

Flexible Automatic Generation Control system for embedded HVDC links

González-Longatt

Steliuk

Hugo

2015

2015 IEEE Eindhoven PowerTech

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Abstract-Future power systems are expected being operated under increasingly stressed conditions and increased uncertainties. The future single European electricity market will entail higher energy trading volumes, for which augmented use of HVDCs is expected to facilitate cross-border bulk power transfers. In traditional power systems a change in demand at one point of network is reflected throughout the system by a change in frequency. However, significant interconnections using HVDC will affect the classical ability of traditional AC system to overcome "together" frequency deviations which may result in a cascading failure and system collapse. Future HVDC systems shall fulfil requirements referring to frequency stability and also intervening in the frequency quality. As consequence HVDC systems will operate providing ancillary service depends on the framework of service. This paper proposes a flexible Automatic Generation Control (AGC) system for embedded HVDC links in order to provide frequency sensitive response and control power interchange.

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“…Simulation results provided in both papers show that such frequency feedback control leads to smaller frequency differences between the two areas. Furthermore, de Toledo et al [5] also mention that using HVDC for primary frequency control yields reduced costs of primary reserves.…”

Section: Introductionmentioning

confidence: 99%

“…Although the control laws proposed in [5,6] were heuristically designed, our control scheme is derived from algorithms for the extensively studied consensus problem, which appears in the context of coordination of multi-agent systems [7]. With the proposed scheme, the power injections from the AC areas into the DC grid are coordinated in such a way that the frequency deviations of all the AC areas stay close to each other despite power imbalances in one area.…”

Section: Introductionmentioning

confidence: 99%

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Coordinated primary frequency control among non-synchronous systems connected by a multi-terminal high-voltage direct current grid

Dai

Phulpin

Sarlette

et al. 2012

IET Gener. Transm. Distrib.

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The authors consider a power system composed of several non-synchronous AC areas connected by a multi-terminal high-voltage direct current (HVDC) grid. In this context, the authors propose a distributed control scheme that modifies the power injections from the different AC areas into the DC grid so as to make the system collectively react to load imbalances. This collective reaction allows each individual AC area to downscale its primary reserves. The scheme is inspired by algorithms for the consensus problem extensively studied by the control theory community. It modifies the power injections based on frequency deviations of the AC areas so as to make them stay close to each other. A stability analysis of the closed-loop system is reported as well as simulation results on a benchmark power system with five AC areas. These results show that with proper tuning, the control scheme makes the frequency deviations converge rapidly to a common value following a load imbalance in an area.

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Case Study of a Multi-Infeed HVDC System

Cited by 16 publications

References 2 publications

Critical receiving power ratio of the receiving system in asynchronously connected power systems based on voltage response analysis

Critical receiving power ratio of the receiving system in asynchronously connected power systems based on voltage response analysis

Flexible Automatic Generation Control system for embedded HVDC links

Coordinated primary frequency control among non-synchronous systems connected by a multi-terminal high-voltage direct current grid

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