Superposition-based Modelling of Series FACTS in Nonlinear Mathematical Optimized Grid Operation

Mende, Denis; Stock, David Sebastian; Hofmann, Lutz

doi:10.1109/isgt-europe47291.2020.9248819

Cited by 1 publication

(7 citation statements)

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“…The optimisation framework with the AC power flow implementation used in this work was developed in [14] and enhanced by the authors of this work to a mixed AC/DC power flow in [15][16][17]. The following descriptions in Sections 2.1-2.3 serve as an introduction by recapping the reference works.…”

Section: Modellingmentioning

confidence: 99%

“…The basic modelling approach for series elements as already described by the author in [16] allows the representation of the most widely known series compensation and FACTS elements, such as the static synchronous series compensator (SSSC), mainly used for power flow control. For all series elements, one common modelling approach principally based on [18] (see Figure 1) is chosen, leading to a uniform implementation of all different series elements into the existing model and bus-based power flow representation.…”

Section: Series Facts For Power Flow Controlmentioning

confidence: 99%

“…Figure 2 shows the equivalent circuit for a converter connected to a bus k of the AC system. Basic modelling approach for series elements (based on [16,18]).…”

Section: Hvdc Systems and Combined Ac/mtdc Power Flowmentioning

confidence: 99%

“…Hence, an explicit modelling of both buses k and m and the subsequent line to the next bus n would lead to a change in the bus admittance matrix Y KK compared to the case without series element (additional node m and series admittance Y se ). Therefore, a kind of superpositioning approach to model series elements without changing the admittance matrix while still representing the full π-line model is chosen as presented by the authors in [16]. Using the formulation presented therein, the series elements can be added as additional bus powers s se = p se + jq se as introduced in (2) and (3).…”

Section: Hvdc Systems and Combined Ac/mtdc Power Flowmentioning

confidence: 99%

“…In addition to the mathematical representation in (15), so-called slack variables i SL are included for the line currents, which enter the objective function via a large factor µ SL . The constraints for the maximum line loadings thus become (16).…”

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confidence: 99%

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Optimised Congestion Management Using Curative Measures in Combined AC/DC Systems with Flexible AC Transmission Systems

Mende,

Hofmann

2024

Energies

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Due to the increasing demand for transport of electrical energy, measures for power flow control, congestion management, and higher utilisation of the existing grid play a decisive role in the transformation of the power system. Hence, enormous efforts must be undertaken using measures of congestion management. Modelling and integration of corresponding measures in optimisation tools to support grid and system operation and therewith reduce the resulting efforts become more important. This is especially true because of the high intermittency and decentralisation of renewable generation leading to increased complexity of the power system, higher loading of assets, and a growing need for control over flexible alternating current transmission systems (FACTS) and high-voltage direct current (HVDC) converters. This work therefore describes the implementation of optimised congestion management in an A Mathematical Programming Language (AMPL)-based nonlinear optimisation problem. AMPL is an effective tool to deal with highly complex problems of optimisation and scheduling. Therefore, the modelling of assets and flexibilities for power flow control in AC/DC systems in combination with an innovative grid operation strategy using predefined curative measures for the optimised use of the existing grid is introduced. The nonlinear mathematical optimisation aims at the optimal cost selection of flexibility measures. The application of the optimisation technique in a combined AC/DC system shows the optimal preventive and curative use of measures in operational congestion management. Simulation results prove that, by using predefined curative measures, the volume of cost-intensive preventive measures can significantly be reduced, especially in association with power flow control.

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Section: Modellingmentioning

confidence: 99%

Section: Series Facts For Power Flow Controlmentioning

confidence: 99%

“…Figure 2 shows the equivalent circuit for a converter connected to a bus k of the AC system. Basic modelling approach for series elements (based on [16,18]).…”

Section: Hvdc Systems and Combined Ac/mtdc Power Flowmentioning

confidence: 99%

Section: Hvdc Systems and Combined Ac/mtdc Power Flowmentioning

confidence: 99%

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confidence: 99%

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