The current objectives for the energy transition in Germany strive a substantial growth decentralized generation based on renewable energies, alongside decarbonization of transportation and heating sectors. rapidly increasing number charging stations heat pumps results high need time-consuming grid reinforcement extension measures. To enable integration new consumers thus increase capacity them, regulations § 14a German Energy Industry Act aim at providing legal basis operators to dim loads...

This paper presents the possibility of using a point-to-point voltage source converter - high direct current (VSC-HVDC) transmission system connecting offshore wind power plant (WPP) to onshore grid as black start unit initiate restoration process for an interconnected electrical after large area blackout. The station (CS) provides in order establish island within integrated CS's and WPP's black-start. Electric loads on mainland can be resupplied auxiliary start-up thermal provided. Possible...

This paper elaborates a corrective congestion management concept for transmission grids involving fast flexible units and storage systems referred to as "grid booster". post-fault remedial action acts first temporary relief congested lines. It enables system operators trigger subsequent measures with significant lead times re-establish an (N-1)-secure state. covers different aspects of integrating grid booster technologies configurations into existing operational planning real-time operation...

Due to the increasing demand for transport of electrical energy, measures power flow control, congestion management, and higher utilisation existing grid play a decisive role in transformation system. Hence, enormous efforts must be undertaken using management. Modelling integration corresponding optimisation tools support system operation therewith reduce resulting become more important. This is especially true because high intermittency decentralisation renewable generation leading...

The energy turnaround in Europe's and especially Germany's system raises various questions concerning the European market as well electrical power grids Germany all over Europe. An enabler to cope with these is possibility simulate respective structure of mechanisms transmission. Because complexity both systems models can get quite complex. main goal project "SystemKontext" at Fraunhofer IWES elaborate which level detail different parts have be modelled obtain valid precise results a focus...

Because of the rapid increase distributed generation, active voltage regulation becomes relevant for low networks. In this paper, several power electronic approaches are presented and compared to each other through a Monte-Carlo-based network analysis. The focus investigation is on series regulator, which simulation results experimental prototype shown.

Frequency control in interconnected electrical power systems is nowadays realized using the networks' conventional thermal plants. With ongoing changes worldwide share of these plants decreasing while renewable resources such as wind and photovoltaics are increasing their continuously. Up to now a contribution sources primary frequency not systems. This paper describes possibilities support turbines with enhanced active functionalities synthetic inertia. The effects analyzed IEEE 39 bus...

The article at hand gives an overview of a newly developed method and tool to flexibly efficiently remediate different kinds congestion in the power grid. presented approach consists three main steps: Building network model, identifying technical factors influencing congestion, formulating solving optimization problem by changing active set points plants. Within approaches for technically economically optimized redispatch are presented. paper focuses on development solution considering both,...

Local reactive power control in distribution grids with a high penetration of distributed energy resources (DERs) will be essential future system operation. Appropriate characteristic curves for DERs support stable and efficient grid However, the current practice is to configure local controllers collectively constant that may not volatile conditions or desired targets operators. To address this issue, paper proposes time series optimization-based method calculate parameters, which enables...

Due to higher penetration of renewable energy sources, grid reinforcements, and the utilization local voltage control strategies, a significant change in reactive power behavior as well an increased demand for additional flexibility German system can be predicted. In this paper, application-oriented management concept is proposed, which allows distribution operators (DSO) enable certain amount at interfaces while supporting imitations grid. To evaluate its feasibility, proposed applied real...

The European power grid infrastructure faces various challenges due to the expansion of renewable energy sources (RES). To conduct investigations on interactions between generation and grid, models for market as well are necessary. This paper describes basic functionalities working principles both types steps couple results model. combination these is beneficial in terms gaining realistic flow scenarios model being able pass back restrictions Focus laid possible application examples like...

This contribution investigates the influence of SiC semiconductor devices for HVDC transmission technology on system level. Different are recently in focus many scientific publications. However, extra high power applications, SiC-JFET exhibits promising properties. In order to assess impact losses such a new technology, scenario large-scale meshed offshore using CIGRE B4 DC Grid Test System is investigated. contrast classical approaches flow calculations, detailed representation...

In this paper, demand-side management (DSM) is performed through demand response aggregators (DRAs) in an uncertain environment within zonal price market framework. The proposed scheme aims to allow cross-border electricity trading and optimize interconnections usage as well obtain optimum DR volume from the perspective of Market Coupling Operator (MCO). consists several markets Nominated Electricity Operators (NEMO) who run their day-ahead balancing internally communicate information MCO...

The local reactive power control in distribution grids with a high penetration of distributed energy resources (DERs) is essential future system operation. Appropriate characteristic curves for DERs support stable and efficient grid However, the current practice to configure controllers collectively constant that may not be volatile conditions or desired targets operators. To address this issue, paper proposes time series optimization-based method calculate parameters, which enables each DER...

Abstract The planned massive increase of producers and consumers such as electric vehicles, heat pumps photovoltaic systems in distribution grids will lead to new challenges the electrical power system. These can include grid congestions at low voltage level but also higher levels. Control strategies enable efficient use flexibilities therefore help mitigate upcoming problems. However, they need be evaluated carefully before their application energy system avoid any unwanted effects choose...

Power system restoration takes place where power systems experience a blackout and might be splitted into several islands with limited number of black start units. The main challenge the process is to keep both frequency voltage within allowable limits while restoring network through energizing lines transformers as well load pickup. pickup scheme determined by specific conditions fulfilled which are in particular lowest nadir rate change. In traditional restoration, these variables function...

Serving a twofold purpose, integrated offshore grids can facilitate the connection of wind generation with onshore networks as well interconnection asynchronous market areas for power trade. With growing amount being deployed in Northern Europe, relevance North Seas Offshore Network (NSON) increases, particularly light high cross-sectoral decarbonisation targets. To investigate future deployments Seas, national NSON project Germany developed closely linked modelling chain involving several...

Ongoing changes in electrical energy systems and increasing possibilities to control power flows increase volatility as well flexibility therefore complexity of their operation. Hence, for flow control, system optimization, efficient integration operation planning currently are researched. Especially grid operation, reproducible robust solutions needed which can be provided by mathematical optimizations. This work describes a novel approach flexibly efficiently integrate different series...

The so-called short-term voltage stability is typical of nonlinear problems arising in dynamic performance electric power systems. This paper reports a simulation result on load margin for the IEEE 9-bus system connected to multi-terminal DC based voltage-source converter (VSC). shows that introduction AC control VSC increases under step change system, thereby showing clear benefit enhancing without harnessing system.