Hybrid Passive-Overcurrent Relay for Detection of Faults in Low-Voltage DC Grids

Saleh, Khaled A.; Hooshyar, Ali; El-Saadany, Ehab F.

doi:10.1109/tsg.2015.2477482

Cited by 122 publications

(66 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DC power system inertia reflects the system capability in preventing the DC voltage from a sudden change. Generalizing (2) to DC systems, the inertia time constant Hdc of one terminal of the DC grid can be defined as…”

Section: A DC Grid Inertia Definitionmentioning

confidence: 99%

“…C grids are currently considered as creditable alternatives to AC grids for integrating renewable energy sources (RES) due to the distinct advantages, such as less power conversion and transmission loss, no concerns on reactive power consumption and power angle stability, and flexible power flow controllability [1]- [2]. However, the capacitance inertia of DC grids is far less than the mechanic inertia of conventional AC grids with synchronous generators [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adjustable Inertial Response From the Converter With Adaptive Droop Control in DC Grids

Wáng

Wang

et al. 2019

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

show abstract

Section: A DC Grid Inertia Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adjustable Inertial Response From the Converter With Adaptive Droop Control in DC Grids

Wáng

Wang

et al. 2019

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

show abstract

“…The connection lines between DC buses are modeled using resistors [32,37,38], RL [36,39] and RLC models [31,40].…”

Section: Modeling Of Dc-microgridsmentioning

confidence: 99%

Passivity-Based Control for DC-Microgrids with Constant Power Terminals in Island Mode Operation

Murillo-Yarce

Garcés-Ruiz

Escobar-Mejía

2018

Rev. Fac. Ing. Univ. Antioquia

View full text Add to dashboard Cite

This paper presents a Passivity Based Control (PBC) for a dc microgrid. PBC is commonly used in electrical systems such as power electronics converters and electric machines, but there are few applications in microgrids operating in island mode. PBC is based on properties of passive systems and energy exchange between subsystems. The proposed strategy performs primary and secondary control of the hierarchical architecture. Local communications and measurements are needed at the nodes where dc/dc converters are placed. Simulation studies are performed in MATLAB to validate the control in a realistic test system composed of renewable energies sources, loads and energy storage units. Results show that the proposed control ensures stability and fast response of the dc-bus voltage under different operating conditions. RESUMEN: Este artículo presenta un Control Basado en Pasividad (CBP) de una microrred DC.El CBP se utiliza conmunmente en sistemas eléctricos como convertidores electrónicos de potencia y máquinas eléctricas, pero hay pocas aplicaciones en microrredes que operan en forma aislada. El CBP se fundamenta en las propiedades de los sistemas pasivos y en el intercambio de energía entre subsistemas. La estrategia propuesta desarrolla control primario y secundario de la arquitectura de control jerárquico. Son necesarias comunicaciones locales y mediciones en los nodos donde se ubican convertidores dc/dc. Estudios de simulación son realizados en MATLAB para validar el control en un sistema de prueba real compuesto por fuentes de energía renovables, cargas y unidades de almacenamiento de energía. Los resultados muestran que el control propuesto garantiza estabilidad y rápida respuesta del voltaje del bus dc bajo diferentes condiciones de operación.

show abstract

“…Microgrids can operate in a low or medium voltage range and generate their own power, that is, renewable sources along with energy storage, nonrenewable sources, and power electronic (PE) controlled loads [1]. The unique property of microgrids is that they can work in islanded mode under faulty conditions, which increases the reliability of the power supply [2][3][4]. In AC microgrids, the distribution system is AC.…”

Section: Introductionmentioning

confidence: 99%

Proportional Load Sharing and Stability of DC Microgrid with Distributed Architecture Using SM Controller

Rashad

Raoof

Ashraf

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

DC microgrids look attractive in distribution systems due to their high reliability, high efficiency, and easy integration with renewable energy sources. The key objectives of the DC microgrid include proportional load sharing and precise voltage regulation. Droop controllers are based on decentralized control architectures which are not effective in achieving these objectives simultaneously due to the voltage error and load power variation. A centralized controller can achieve these objectives using a high speed communication link. However, it loses reliability due to the single point failure. Additionally, these controllers are realized through proportional integral (PI) controllers which cannot ensure load sharing and stability in all operating conditions. To address limitations, a distributed architecture using sliding mode (SM) controller utilizing low bandwidth communication is proposed for DC microgrids in this paper. The main advantages are high reliability, load power sharing, and precise voltage regulation. Further, the SM controller shows high robustness, fast dynamic response, and good stability for large load variations. To analyze the stability and dynamic performance, a system model is developed and its transversality, reachability, and equivalent control conditions are verified. Furthermore, the dynamic behavior of the modeled system is investigated for underdamped and critically damped responses. Detailed simulations are carried out to show the effectiveness of the proposed controller.

show abstract

Hybrid Passive-Overcurrent Relay for Detection of Faults in Low-Voltage DC Grids

Cited by 122 publications

References 17 publications

Adjustable Inertial Response From the Converter With Adaptive Droop Control in DC Grids

Adjustable Inertial Response From the Converter With Adaptive Droop Control in DC Grids

Passivity-Based Control for DC-Microgrids with Constant Power Terminals in Island Mode Operation

Proportional Load Sharing and Stability of DC Microgrid with Distributed Architecture Using SM Controller

Contact Info

Product

Resources

About