Future-proof islanding detection schemes in Sundom Smart Grid

Abstract

Future resilient distribution grids need new, standardbased, agile management and protection architectures which can intelligently utilize flexible, distributed energy resources for local and system-wide technical services. For example, future-proof islanding detection methods can be realized and utilization of flexible energy resources can be maximized by taking into account fault location, power balance situation, prioritization issues and intentional island operation status as part of the islanding detection scheme. In this paper future-proof, grid code compatible islanding detection schemes will be determined for both medium-and low-voltage network connected distributed generation units during both gridconnected and islanded (nested microgrid) operation of Sundom Smart Grid. Also significant issues, like network status dependency, distributed generation unit type, faultride-through capability and fault behavior as well as high-speed wireless 5G communication and routable GOOSE, having impact on future islanding detection schemes will be presented and discussed.

Combined islanding detection scheme utilising active network management for future resilient distribution networks

“…2) during grid‐connected operation are presented. The simulation studies purpose for this paper was to focus on the development of primarily combined islanding detection schemes [10] shown in Fig. 1 (i.e.…”

“…Therefore, in the future, for example, centralised islanding detection logic at HV/MV and MV/LV substation protection and control unit level utilising high‐speed communication (cost‐efficient, low‐latency wireless 5G and R‐GOOSE in the future) would be very potential way to realise these future schemes which have dependencies with protection and ANM functionalities (Fig. 1) [10]. Utilised islanding detection scheme should be coordinated with used protection scheme during normal grid‐connected operation as well as with distributed energy resourced (DER) unit P/f and Q/U ‐control grid‐code requirements as stated in [10].…”

“…1) [10]. Utilised islanding detection scheme should be coordinated with used protection scheme during normal grid‐connected operation as well as with distributed energy resourced (DER) unit P/f and Q/U ‐control grid‐code requirements as stated in [10]. In addition, both islanding detection and protection (e.g.…”

“…1 b ), protection and islanding detection functionalities (Fig. 1 a ) [10]. Today there are two DG units connected to SSG (Fig.…”

“…1). Realisation of future‐proof and grid‐code compatible schemes requires studies regarding dependencies between protection, islanding detection and ANM functionalities [1, 5–13].…”