New HVDC technology in Pan-European power system planning

Michi, L.; Donnini, Giacomo; Giordano, Chiara; Scavo, Francesca; Luciano, E.G.; Aluisio, Benedetto; Vergine, Chiara; Pompili, M.; Lauria, S.; Calcara, Luigi; L'Abbate, A.

doi:10.1109/aeit-hvdc.2019.8740544

Cited by 9 publications

(8 citation statements)

References 9 publications

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“…This voltage should be defined according to the current direction at the load current branch and the polarity of the capacitor voltage. For instance, if the voltage polarity and current direction (i1 (1) ) are as shown in Fig. 7(a), IGBTs S1 and S3 of the MFB should be closed so that the inserted voltage is reversed.…”

Section: B Operating Sequencementioning

confidence: 99%

“…More recently, there has been a growing interest of connecting converter terminals to build multi-terminal HVDC grids. This has been reflected not only by a substantial amount of academic research [1], [2], but also by recent practical projects, such as the ±200kVdc Zhoushan five-terminal HVDC grid and the ±500kVdc Zhangbei fourterminal HVDC system [3], [4]. These two multi-terminal systems are intended for the grid integration of renewables while, at the same time, ensuring reliability of power supply.…”

Section: Introductionmentioning

confidence: 99%

“…Detailed MFB action to create current zero-crossing: (a) i1(1) flowing from N1 to other nodes; (b) i1(1) flowing from other nodes to N1.…”

mentioning

confidence: 99%

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A Low-Loss Integrated Circuit Breaker for HVDC Applications

Wang

Ming

Ugalde‐Loo

et al. 2022

IEEE Trans. Power Delivery

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Hybrid dc circuit breakers (HCBs) are recognized as suitable devices for protecting high-voltage direct-current (HVDC) systems, along with other dc circuit breakers (DCCB). However, compared to mechanical circuit breakers, HCBs exhibit higher conduction losses. Such losses are inevitable under no-fault conditions as current may flow through some of the semiconductor switches. An integrated circuit breaker (ICB) minimizing these losses is presented in this paper, and this is achieved by replacing semiconductor switches by mechanical components in the current path. For completeness, the topology design, operating sequence and a mathematical analysis for component sizing of the device are provided. In addition, an estimation of the conduction losses is quantified. It is estimated that the power losses of an ICB are 2 to 30% of an HCB only. The ICB has been implemented in PSCAD/EMTDC to demonstrate its effectiveness for isolating dc faults, with simulations conducted on a three-terminal HVDC grid.

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Section: B Operating Sequencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Low-Loss Integrated Circuit Breaker for HVDC Applications

Wang

Ming

Ugalde‐Loo

et al. 2022

IEEE Trans. Power Delivery

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“…Such is the case of world energy council (WEC) that in [1] recommends to reduce the use of fossil fuels increasing the use of alternative renewable energy sources, this can be done by identifying different scenarios that facilitate their transition. The previous proposed transition has important challenges in the electrical infrastructure: since by nature, the growth in energy demand is concentrated in regions generally distant from the main and major sources of sustainable renewable generation [2].…”

Section: Introductionmentioning

confidence: 99%

Planning multi-terminal direct current grids based graphs theory

Ríos

Acero

2021

IJECE

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Transmission expansion planning in AC power systems is well known and employs a variety of optimization techniques and methodologies that have been used in recent years. By contrast, the planning of HVDC systems is a new matter for the interconnection of large power systems, and the interconnection of renewable sources in power systems. Although the HVDC systems has evolved, the first implementations were made considering only the needs of transmission of large quantities of power to be connected to the bulk AC power system. However, for the future development of HVDC systems, meshed or not, each AC system must be flexible to allow the expansion of these for future conditions. Hence, a first step for planning HVDC grids is the planning and development of multi-terminal direct current (MTDC) systems which will be later transformed in a meshed system. This paper presented a methodology that use graph theory for planning MTDC grids and for the selection of connection buses of the MTDC to an existing HVAC transmission system. The proposed methodology was applied to the Colombian case, where the obtained results permit to migrate the system from a single HVDC line to a MTDC grid.

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“…Multiterminal high voltage direct current (HVDC) grids are expected to be used to gather renewable energy from wind and solar power plants. At present, some multiterminal HVDC grids and several point-to-point HVDC links are already in operation to connect distant offshore wind farms to the onshore electrical grid [1][2][3]. For these grids, the modular multilevel converter (MMC) is the preferred topology because of its modularity, scalability, independent control of the active and reactive powers, capability to supply weak or passive networks, black-start capability, and ease to build multiterminal grids.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Enhanced Control of Hybrid Full Bridge–Half Bridge MMCs for HVDC Grid Studies

Vidal-Albalate¹,

Forner²

2020

Energies

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Modular multilevel converters (MMCs) are expected to play an important role in future high voltage direct current (HVDC) grids. Moreover, advanced MMC topologies may include various submodule (SM) types. In this sense, the modeling of MMCs is paramount for HVDC grid studies. Detailed models of MMCs are cumbersome for electromagnetic transient (EMT) programs due to the high number of components and large simulation times. For this reason, simplified models that reduce the computation times while reproducing the dynamics of the MMCs are needed. However, up to now, the models already developed do not consider hybrid MMCs, which consist of different types of SMs. In this paper, a procedure to simulate MMCs having different SM topologies is proposed. First, the structure of hybrid MMCs and the modeling method is presented. Next, an enhanced procedure to compute the number of SMs to be inserted that takes into account the different behavior of full-bridge SMs (FB-SMs) and half-bridge submodules (HB-SMs) is proposed in order to improve the steady-state and dynamic response of hybrid MMCs. Finally, the MMC model and its control are validated by means of detailed PSCAD simulations for both steady-state and transients conditions (AC and DC faults).

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New HVDC technology in Pan-European power system planning

Cited by 9 publications

References 9 publications

A Low-Loss Integrated Circuit Breaker for HVDC Applications

A Low-Loss Integrated Circuit Breaker for HVDC Applications

Planning multi-terminal direct current grids based graphs theory

Modeling and Enhanced Control of Hybrid Full Bridge–Half Bridge MMCs for HVDC Grid Studies

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