Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Ehrenberger, Jakub; Švec, Ján

doi:10.3390/en10101452

Cited by 17 publications

(12 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3 shows this assembly and implementation. The low signal of the current and voltage of RC sensors changes to form a square wave having a value of "±1" and then multiplying these level signals to produce a positive number in the overlap interval, in the negative numbers are generated in the non-overlap interval [30].…”

Section: Proposed Protection System Simulation and Modellingmentioning

confidence: 99%

New High-Speed Directional Relay Based on Wireless Sensor Network for Smart Grid Protection

Abdulwahid¹

2019

Telecommunication Systems - Principles and Applications of Wireless-Optical Technologies

View full text Add to dashboard Cite

The production of energy from water represents large amounts of clean and renewable energy. However, only 30% of this energy has been developed so far. Hydropower, particularly hydropower plants, is not only environmentally friendly but also economical, and operates more efficiently than any other renewable energy system. Hydropower plants are largely automated and have relatively low operating costs. The main components of the power system must be continuously monitored and protected to maintain the quality and reliability of the power source. This task is provided by the data collection, monitoring and protection system. Turbines must be protected not only by short circuits but also by abnormal conditions. The proposed protection has been designed to avoid damaging the original power (motor or turbine), this usually happens when the generator fails, and the machine operates as a synchronous motor connected to the power system. In this case, the generator becomes an active load, causing a rise in temperature and severe damage to the main turbine, and hence it becomes a need to quickly detect these conditions. This study proposes a new controller for Neuro-Fuzzy to prevent reverse power flow and to keep the quality and reliability of supply. Fuzzy system network has attracted various scientific and engineering researchers. The new feature of this work is to adjust the membership function as a reverse mechanism derived of the Fuzzy Logic Controller. The smart meter network is the basis of the smart grid. In this study, smart grid meters were implemented using ZigBee technology based on wireless sensor networks. The ZigBee network of wireless sensors due to its low battery, low power consumption, become more useful than other wireless communication systems to provide a high-performance measurement. This study shows the ZigBee network using the OPNET simulation. Depending on the performance, parameters were analysed to understand the operating characteristics of the star, tree, and mesh.Although neural networks implement to solve tuning problems, the fuzzy logic controller is intended to use structured knowledge in the form of rules [4,5].The combination of Fuzzy Logic and neural networks provides the ability to solve optimisation problems. This new method consolidates the established advantages of both approaches and avoids the limitations of both approaches. Control algorithms are used to prevent unexpected fluctuations in voltage and frequency. Smart grids use energy storage systems and communication networks to ensure total coordination between power generation and energy use. Reduce the energy loss of the network to minimise demand and energy costs [6][7][8]. A reliable, real-time information flow among parts of the network is critical to the success of the smart grid self-regulation process. There are many wireless standards for technical applications [9]. One of the most popular technologies is ZigBee wireless sensor network (WSN), which is distributed on the smart grid structure, which has a lot of equipment...

show abstract

Section: Proposed Protection System Simulation and Modellingmentioning

confidence: 99%

New High-Speed Directional Relay Based on Wireless Sensor Network for Smart Grid Protection

Abdulwahid¹

2019

Telecommunication Systems - Principles and Applications of Wireless-Optical Technologies

View full text Add to dashboard Cite

show abstract

“…The DOC relay coordination OF is considered a highly constrained function, as there are many factors, boundaries and constraints that must be employed before starting the optimization process. Firstly, there are certain limits for the CTS and TDS of each relay as per (4) and (5):…”

Section: Constraints Of the Optimization Problemmentioning

confidence: 99%

“…However, the selectivity is guaranteed only if there is a total coordination between the main and back-up relays, as shown in Figure 1 [3]. This coordination becomes more complex in the presence of distributed generation because of the bidirectionality of the phase currents [4,5]. The coordination between primary and back-up relays is achieved by selecting suitable current tap setting (CTS) and time dial setting (TDS) to guarantee a coordination time interval (CTI) [3,[6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Optimal Coordination of DOC Relays Incorporated into a Distributed Generation-Based Micro-Grid Using a Meta-Heuristic MVO Algorithm

Abdelsalam

Diab

2019

Energies

View full text Add to dashboard Cite

Distributed, generation-based micro-grids are increasingly being used in the build-up of the modern power system. However, the protection of these micro-grids has many challenges. One of the important challenges is the coordination of directional overcurrent (DOC) relays. The optimization of the coordination of DOC relays is considered a nonlinear programming problem with pre-defined constrains. In this paper, the problem of the optimal coordination of DOC relays is solved using a multi-verse optimization (MVO) algorithm which is inspired from cosmology science. The proposed algorithm is tested by applying it to Institute of Electrical and Electronics Engineers (IEEE) 3 bus and IEEE 9 bus networks. The performance of the proposed algorithm is compared with the particle swarm optimization (PSO) algorithm when applied to both networks. All results show that the performance of the MVO algorithm is better than PSO in terms of its reduction of both the overall operating time (OT) of DOC relays and the computational burden of the computer solving the optimization problem.

show abstract

“…In [13], the authors proposed an index to measure the impact on OCRs coordination when DG units are included. The directional OCRs coordination problem is also analyzed in [14] in DNs with high participation of DG. The authors of [15] proposed a methodology for OCRs coordination which includes the N-1 security criterion.…”

Section: Introductionmentioning

confidence: 99%

Optimal Coordination of Overcurrent Relays in Microgrids Considering a Non-Standard Characteristic

2020

View full text Add to dashboard Cite

The optimal coordination of overcurrent relays (OCRs) has recently become a major challenge owing to the ever-increasing participation of distributed generation (DG) and the multi-looped structure of modern distribution networks (DNs). Furthermore, the changeable operational topologies of microgrids has increased the complexity and computational burden to obtain the optimal settings of OCRs. In this context, classical approaches to OCR coordination might no longer be sufficient to provide a reliable performance of microgrids both in the islanded and grid-connected operational modes. This paper proposes a novel approach for optimal coordination of directional OCRs in microgrids. This approach consists of considering the upper limit of the plug setting multiplier (PSM) as a variable instead of a fixed parameter as usually done in traditional approaches for OCRs coordination. A genetic algorithm (GA) was implemented to optimize the limits of the maximum PSM for the OCRs coordination. Several tests were performed with an IEC microgrid benchmark network considering several operational modes. Results showed the applicability and effectiveness of the proposed approach. A comparison with other studies reported in the specialized literature is provided showing the advantages of the proposed approach.

show abstract

Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Cited by 17 publications

References 26 publications

New High-Speed Directional Relay Based on Wireless Sensor Network for Smart Grid Protection

New High-Speed Directional Relay Based on Wireless Sensor Network for Smart Grid Protection

Optimal Coordination of DOC Relays Incorporated into a Distributed Generation-Based Micro-Grid Using a Meta-Heuristic MVO Algorithm

Optimal Coordination of Overcurrent Relays in Microgrids Considering a Non-Standard Characteristic

Contact Info

Product

Resources

About