A novel adaptive protection coordination scheme for radial distribution networks in the presence of distributed generation

Abstract

Summary Developing micro‐grids and increasing penetration of distributed generation (DG) bring significant techno‐economic benefits to power systems. However, the presence of DG can affect the performance of the protection system. In particular, the coordination of over‐current protection relays in the presence of DGs is a challenging task. In this article, an adaptive algorithm is proposed for protection coordination of over‐current relays. Once the coordination of relays is disturbed due to the presence of DG, the characteristic curve of the backup relay is adaptively modified based on the characteristic curve of the main relay in such a way that the coordination time interval (CTI) be in the acceptable range and therefore the coordination of relays is maintained. The proposed algorithm can maintain the coordination of over‐current relays locally only by controlling current parameter of backup relay and without imposing any restriction on the output power of DGs. Therefore, the proposed protection coordination scheme allows system operators and DG owners to exploit DG benefits without concerning about protection aspects related to the presence of DGs. The efficiency and applicability of the proposed method are validated using simulations on a typical industrial 20 kV radial distribution system. The simulation results show that the proposed algorithm can maintain the CTI of the main and backup relays in an acceptable range for various penetration levels of DGs.

Fuse saving coordination scheme for active distribution systems: State‐of‐the‐art and a novel quasi‐voltage current based scheme

“…The main problem of integration of DG units into the load side appears in the abnormal operating condition [17, 35–39]. The generated power of DG units are variable and dependent on the environmental conditions; also, they are distributively installed in the distribution system from small rating up to large farms [40]. The presence of DG units changes the current profile of the distribution system.…”

An over current relay coordination: A comparative analysis of metaheuristic and linear program approach

“…Another method of OCR coordination using an enhanced discrete differential evolution algorithm is proposed for a microgrid at grid‐connected mode 29 . In Reference 30, an adaptive protection scheme is suggested for radial distribution networks in the presence of DGs. In 2021, the author applied a very recent hybrid WCMF algorithm to address the microgrid relay coordination issue 31 .…”

Coordenação da proteção para topologias de redes de distribuição radiais usando a otimização por enxame de partículas evolucionária diferencial

“…A abordagem de PA na atualização da configuração pode ser pré-configurada (Offline) ou sem pré-configuração (Tempo Real). (KHALID;SHOBOLE, 2021;BISHEH et al, 2021).…”

“…Devido à variação de topologia, a coordenação entre o relé principal e o de backup pode ser prejudicada. De acordo com Bisheh et al (2021), usando a figura 4, 3 casos podem ser considerados:…”

“…Outro trabalho onde a curva é modificada é o de Bisheh et al (2021) onde analisa os impactos da presença de GD no SD e os classifica em 3 casos de acordo com sua localização. Em seguida, descreve o método de coordenação proposto, onde define a corrente de falta com GD como a soma da corrente fornecida pela rede externa e a contribuição da GD, que é função da localização e da potência fornecida.…”