N-1-Secure Dispatch Strategies of Embedded HVDC Using Optimal Power Flow

Meyer-Huebner, Nico; Weck, S.; Bennewitz, F.; Suriyah, Michael; Bhalodi, K.H.; Giuntoli, Marco; Biagini, V.; Krontiris, Athanasios; Wasserrab, Andreas; Ndreko, Mario; Wiest, Michael; Hanson, Jutta

doi:10.1109/pesgm.2018.8586478

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…There are in general two different approaches to ensure operational n ‐1 security, namely the preventive and the curative approach. The latter does not take corrective actions until outages in the network occur, while the preventive approach activates countermeasures to ensure a priori security margin for each contingency case [42]. The simulations carried out in this work assume curative congestion management, thus for different contingency situations the necessary amount of curtailment actions is determined, which would only be realised if the considered outages actually occurred.…”

Section: Implementation and Simulation Resultsmentioning

confidence: 99%

Optimised curtailment of distributed generators for the provision of congestion management services considering discrete controllability

Liere-Netheler¹,

Schuldt²,

Maydell³

et al. 2020

IET Generation, Transmission & Distribution

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Section: Implementation and Simulation Resultsmentioning

confidence: 99%

Optimised curtailment of distributed generators for the provision of congestion management services considering discrete controllability

Liere-Netheler¹,

Schuldt²,

Maydell³

et al. 2020

IET Generation, Transmission & Distribution

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“…It was introduced by Carpentier [1] and the conventional AC OPF was studied to large extents in the last decades, a review can be found in [2], [3]. Lately, the OPF problem was extended to the above stated AC-DC grid in [4]- [10] by using voltage source converters (VSCs) to transfer power between AC and DC grid. The highly controllable VSCs are used to minimize steady-state losses in [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

“…AC-DC OPF is used in [8] to evaluate economic aspects when installing VSC-based DC systems in an existing AC system and the authors in [9] include energy storage systems in the hybrid grid. N-1-secure dispatch strategies for embedded DC links are presented in [10].…”

Section: Introductionmentioning

confidence: 99%

Distributed Optimal Power Flow in Hybrid AC–DC Grids

Meyer-Huebner

Suriyah

Leibfried

2019

IEEE Trans. Power Syst.

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Distributed or multi-area optimal power flow (OPF) in alternating current (AC) grids is currently a subject undergoing intense study to cope with computational burdens in large-scale grids and to maintain self-control of a regional system operator. However, future power grids will most likely be hybrid grids consisting of the conventional AC transmission system combined with high voltage direct current (DC) technology. Thus, we reformulate the full AC-DC OPF problem such that it becomes separable and, therefore, accessible to distributed algorithms. Then, we show in detail two different approaches on the decomposition of a hybrid AC-DC grid. Finally, we implement an improved alternating direction of multipliers method (ADMM) as well as the most recently proposed augmented Lagrangian based alternating direction inexact Newton (ALADIN) method. Simulation results show that optimality gaps below 0.01% are reached with both decomposition approaches and algorithms for two different test systems (5-bus and 66-bus). Furthermore, convergence rates and wall clock times are reduced by around one order of magnitude from ADMM to ALADIN.Index Terms-Distributed optimal power flow, multi-area optimal power flow, AC-DC grid, ADMM, ALADIN.

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“…in [1,8] and [9]. In [10] a corrective SC-OPF methodology is employed to investigate the capabilities of embedded HVDC systems to compensate for contingency cases in the AC system and thus to reduce redispatch by generators.…”

Section: Introductionmentioning

confidence: 99%

“…To our knowledge the effects of N − 1 cases inside the DC systems have not yet been studied extensively in the literature. As in [10] we focus on the capabilities of the grid components and in particular the embedded HVDC systems to compensate for contingency cases and to avoid generator redispatch.…”

Section: Introductionmentioning

confidence: 99%

Security Analysis of Embedded HVDC in Transmission Grids

Giuntoli¹,

Schmitt²

2019

Trends in Mathematics

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Security-constrained optimal power flow is widely used by grid operators during their short-term operations. Possible contingencies (e.g. outages of lines, generators) analyzed during this phase may be very critical for the stability of the power system. Thus, a simplified or reduced approach might not be desired. Moreover, the presence of embedded high-voltage direct current (HVDC) links (i.e. the DC link is done between two or more synchronous AC nodes) increases the degrees of freedom of the physical problem and thus an economically better working point for the system can be reached. To do this, a coordinated control between the AC and DC systems is required using one single stage of optimal power flow including the security assessment. In this work the SC-OPF (Security-Constrained Optimal Power Flow) approach is used to analyse the effects of contingency cases within the DC system.

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N-1-Secure Dispatch Strategies of Embedded HVDC Using Optimal Power Flow

Cited by 8 publications

References 7 publications

Optimised curtailment of distributed generators for the provision of congestion management services considering discrete controllability

Optimised curtailment of distributed generators for the provision of congestion management services considering discrete controllability

Distributed Optimal Power Flow in Hybrid AC–DC Grids

Security Analysis of Embedded HVDC in Transmission Grids

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