View in EDS

Protection verification and designing while establishing collective prosumer's low-voltage electrical installation. A case study.

Saved in:
Bibliographic Details
Title: Protection verification and designing while establishing collective prosumer's low-voltage electrical installation. A case study.
Authors: Sobolewski, Robert Adam1 (AUTHOR) r.sobolewski@pb.edu.pl, Lis, Robert2 (AUTHOR)
Source: Electric Power Systems Research. May2023, Vol. 218, pN.PAG-N.PAG. 1p.
Subjects: Design protection, Electric shock, Energy storage, Power resources, Short-circuit currents, Safety appliances
Abstract: • Protection against electric shock and protection selectivity in collective prosumer electrical installations (cPEI) are investigated. • A cPEI can be easily established based on LV distribution system. • Original protective devices implemented in LV distribution system must be verified while the cPEI is planned to operate in island mode. • The case study demonstrates the whole process of protection verification to meet the requirements. • The case study prove the original protection devices and introducing molded case circuit breakers can satisfy the protection requirements. IEC 60364-8-2 introduces many safety issues concerning a new concept of integration of electricity consumers and local power generation and energy storage, i.e., prosumer's low-voltage electrical installations. A collective type of them is several consumer installations connected to the same public distribution system and sharing one common set of local power supplies and energy storage unit. The transition to island mode raises technical challenges related to ensuring the protection selectivity and the effectiveness of protection against electric shock. They result from the expected short-circuit currents, much smaller compared to other modes. In this paper, the first approach for protection verification and design concerning collective prosumers' electrical installation to be established based on an existing low-voltage distribution system in each area (group of prosumers) is proposed. It includes the following: calculation of short-circuit currents while operating in island mode, selection of the currents relying on the current limit of an energy storage unit, verification of the protection devices, and design of the additional protection. The case study confirms the approach allows for the investigation of the common protection devices in terms of meeting both the safety and selectivity requirements. Otherwise, advanced protection schemes and strategies should be considered to meet the same safety requirements. [ABSTRACT FROM AUTHOR]
Copyright of Electric Power Systems Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:• Protection against electric shock and protection selectivity in collective prosumer electrical installations (cPEI) are investigated. • A cPEI can be easily established based on LV distribution system. • Original protective devices implemented in LV distribution system must be verified while the cPEI is planned to operate in island mode. • The case study demonstrates the whole process of protection verification to meet the requirements. • The case study prove the original protection devices and introducing molded case circuit breakers can satisfy the protection requirements. IEC 60364-8-2 introduces many safety issues concerning a new concept of integration of electricity consumers and local power generation and energy storage, i.e., prosumer's low-voltage electrical installations. A collective type of them is several consumer installations connected to the same public distribution system and sharing one common set of local power supplies and energy storage unit. The transition to island mode raises technical challenges related to ensuring the protection selectivity and the effectiveness of protection against electric shock. They result from the expected short-circuit currents, much smaller compared to other modes. In this paper, the first approach for protection verification and design concerning collective prosumers' electrical installation to be established based on an existing low-voltage distribution system in each area (group of prosumers) is proposed. It includes the following: calculation of short-circuit currents while operating in island mode, selection of the currents relying on the current limit of an energy storage unit, verification of the protection devices, and design of the additional protection. The case study confirms the approach allows for the investigation of the common protection devices in terms of meeting both the safety and selectivity requirements. Otherwise, advanced protection schemes and strategies should be considered to meet the same safety requirements. [ABSTRACT FROM AUTHOR]
ISSN:03787796
DOI:10.1016/j.epsr.2023.109185