Abstract
Taking advantage of the flexibility of Distributed Energy Resources (DER) can help improve distribution network efficiency, reliability and resilience. EUniversal project aims to facilitate the use of flexibility services and interlink active system management of distribution system operators with electricity markets. congestion management and voltage control have been identified has the most relevant needs, within different operation timeframes, namely: from day, weeks and years ahead. This paper considers long-term flexibility services to support maintenance actions, increasing the periods where is technically possible to perform maintenance actions maintaining security of operation. The methodology developed to schedule planned maintenance actions based on forecasted network profiles, maintenance costs, network reconfiguration capability and flexibility contracted in long-term flexible markets will be presented. © The Institution of Engineering and Technology 2023.

Abstract
This chapter presents key insights for the planning and operation of distribution power grids integrating high shares of renewable generation and charging capacity for electric vehicles (EVs). Case studies are presented to illustrate the impact of expected trends for vehicle electrification in the operation and future expansion of distribution power grids. The potential of innovative approaches is also exploited. The smart-transformer concept based on solid-state-transformer architectures as well as hybrid AC/DC distribution grids is qualitatively evaluated as a suitable solution for the massive integration of EV charging.

Abstract
Flexibility markets are emerging across Europe to improve the efficiency and reliability of distribution networks. This paper presents a methodology that integrates local flexibility markets into network maintenance scheduling, optimizing the process by contracting flexibility to avoid technical issues under the topology defined to operate the network during maintenance. A meta-heuristic approach, Evolutionary Particle Swarm Optimization (EPSO), is used to determine the optimal network topology.

Abstract
In this contribution the approaches that were developed in the European project SmartGuide are presented. Within its scope it is analysed how to address the challenges in planning and operating distribution systems resulting from the general transformation of the energy system, in particular concerning the development of generation and load. The paper presents four different methodologies and tools that facilitate the assessment of flexibilities and smart grid technologies for the reinforcement of European smart grids. Subsequently, the derivation of European planning guidelines by utilising the results of the tools is described.????

Abstract
During the transformation process of the energy supply system particularly the electricity networks need to be reinforced in the upcoming years. During network planning this can be achieved efficiently by considering innovative technologies and measures as well as by exchanging experiences at European level. This article presents developed methods and tools to derive European planning guidelines for distribution grids. In addition the first preliminary guidelines are introduced. They are based on the different challenges considered in the planning as well as the demonstrated operational capability of innovative technologies and measures. An increase of the feed-in by renewable energy resources as well as the consumption by electric vehicles is taken into account.