Lars Jendernalik

RWE · Westnetz

Grid control algorithms need to be tested in a simulation before adapting to the real network operation. Typical simulation techniques are load flow based. Thus, an appr opriate network model and realistic input data are needed. Varying feed-in and load data may lead to considerably differing loading scenarios. The quality and plausibility of data...

Distribution systems operator (DSO's) are facing significant challenges in network planning due to the integration of distributed energy resources (DER), smart grid technologies, E-mobility, regulation and volatile market conditions. In the previous work, it was shown (a) how DSO's are able to optimise planning of network assets in the presence of...

DSO’s are facing significant challenges in network planning due to the integration of DER, Smart Grid technologies, E-Mobility, regulation and volatile market conditions. In previous work it was shown (A) how DSO’s are able to optimize planning of network assets in the presence of high uncertainty [1] and (B) how to describe the interdependencies b...

The German " Energiewende " leads to significant uncertainty in terms of future demand and generation development. Distribution networks are mainly affected by the resulting different divergent requirements: Distribution networks are transformed into local transportation grids. Additionally network investments are restricted by regulation. The solu...

The German " Energiewende " enforces structural adaptions on the distribution grid which require significant investments. Finding cost optimal measures and synergies between state based and capacity based grid adaption under given uncertainties offers an obvious solution in this transition process. A prototype has been presented in [1] showing a pr...

Because of an expected increasing use of harmonic producing devices, the harmonic content in electrical distribution networks attracts more and more attention. Primarily, harmonics are caused by modern loads, which are connected to the electrical grid by power electronic interfaces. In order to analyze the effects of a widespread use of such nonlin...

Zusammenfassung Der kontinuierlich fortschreitende Ausbau von dezentralen Erzeugungsanlagen (DEA) führt bereits heute zu Engpässen in Verteilnetzen. Neben dem konventionellen Netzausbau suchen Netzbetreiber nach alternativen Lösungen, die Flexibilität in den Betrieb einbringen und eine weitere DEA-Integration unterstützen. Im deutschen Teil des eur...

Distorted currents and voltages are an increasing problem in electrical power networks. Primarily, they are caused by loads and decentralized power supply units which are connected by power electronic interfaces. In order to analyze the effects of a widespread use of such nonlinear appliances, nonlinear models have to be developed. Beside the curre...

The "Energiewende" in Germany and resulting legal requirements lead to a dynamic increase of decentralized energy generation and the essential network integration. The power distribution system represents the central hub between decentralized energy resources and load customers. German distribution system operators are obliged to immediate network...

Planning of Distribution Systems is facing several new challenges: (1)The portion of decentralized renewable sources within the distribution area is increasing (leading to inversion of power flows and potential congestions). (2)Prediction scenarios describing the future construction of renewable energy sources resp. decommissioning of conventional...

In order to analyze the effects of a widespread use of nonlinear appliances harmonic measurements are done on specific examples like compact fluorescent lamps (CFL) and photovoltaic (PV) inverters. The results of the investigation determine requirements on nonlinear models, which are necessary to consider the impact of mass implementation. Particul...

The research project IO.Netz(∗) aims to improve the current process of long term distribution system planning. Analysing and planning today's distribution systems is still characterized by isolated software tools so that network planners have to deal with a list of shortcomings. Furthermore they have to deal with an increasing complex environment a...

The effects of a widespread use of Compact Fluorescent Lamps (CFLs) on harmonics in the low voltage grid are analyzed. Therefore, measurements of the harmonic characteristics of nine different brands of CFLs are done. Based on these measurement results, a simulation model is developed, which enables to study the interaction of multiple CFLs. Thereb...

The field of duties and responsibilities of the asset management of electrical distribution grids has increased in recent years. Long-term oriented target grid planning forms an essential base of these assignments. This paper describes the actual and future demands of this fundamental planning process. Besides a detailed explanation of individual m...

The authors describe the development and implementation of a new software for time-dependent load modeling in distribution networks. This paper describes the features of the applications, the obstacles, and the first practical experiences of the using asset management division. Selected examples demonstrate the employment in practice

CIRED 1999 included the presentation of a principle method for extended modeling of electrical loads in the scope of medium-voltage distribution networks. In the meantime, a software application was implemented to automate the presented functions. This paper describes the extended possibilities of the application bundle, the obstacles of implementa...