A new differential protection scheme for microgrid using Hilbert space based power setting and fuzzy decision processes

Abdulwahid, Ali Hadi; Wang, Shaorong

doi:10.1109/iciea.2016.7603542

Cited by 14 publications

(11 citation statements)

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“…the value of the harmonic components h, and I 1 is the r.m.s. value of the fundamental component [21]. THD variation (∆THD t ) is a measure of how much the monitored THD at time t deviates from the steady state normal loading conditions, where THD reference value for the steady state.…”

Section: Thd Detection Methodsmentioning

confidence: 99%

“…In n-dimensional Hilbert space, according to the principle that the active current is the component of phase current that has the minimum average capacity for work, the active current vector i p is defined as the projection of the phase current vector i to the phase voltage vector u as Equation (16) [21].…”

Section: Proposed Algorithm Of Hilbert Space-based Power (Hsbp) For Pmentioning

confidence: 99%

“…The proposed architecture has proven to be sufficiently capable of extracting the fault in a microgrid model. Figure 7 shows a flow chart for fault detection via ANFIS [21]. …”

mentioning

confidence: 99%

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A Novel Approach for Microgrid Protection Based upon Combined ANFIS and Hilbert Space-Based Power Setting

Abdulwahid

Wang

2016

Energies

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Nowadays, the use of distributed generation (DG) has increased because of benefits such as increased reliability, reduced losses, improvement in the line capacity, and less environmental pollution. The protection of microgrids, which consist of generation sources, is one of the most crucial concerns of basic distribution operators. One of the key issues in this field is the protection of microgrids against permanent and temporary failures by improving the safety and reliability of the network. The traditional method has a number of disadvantages. The reliability and stability of a power system in a microgrid depend to a great extent on the efficiency of the protection scheme. The application of Artificial Intelligence approaches was introduced recently in the protection of distribution networks. The fault detection method depends on differential relay based on Hilbert Space-Based Power (HSBP) theory to achieve fastest primary protection. It is backed up by a total harmonic distortion (THD) detection method that takes over in case of a failure in the primary method. The backup protection would be completely independent of the main protection. This is rarely attained in practice. This paper proposes a new algorithm to improve protection performance by adaptive network-based fuzzy inference system (ANFIS). The protection can be obtained in a novel way based on this theory. An advantage of this algorithm is that the protection system operates in fewer than two cycles after the occurrence of the fault. Another advantage is that the error detection is not dependent on the selection of threshold values, and all types of internal fault can identify and show that the algorithm operates correctly for all types of faults while preventing unwanted tripping, even if the data were distorted by current transformer (CT) saturation or by data mismatches. The simulation results show that the proposed circuit can identify the faulty phase in the microgrid quickly and correctly.Keywords: microgrid protection; adaptive network-based fuzzy inference system (ANFIS); Hilbert space-based power (HSBP); total harmonic distortion (THD)

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Section: Thd Detection Methodsmentioning

confidence: 99%

Section: Proposed Algorithm Of Hilbert Space-based Power (Hsbp) For Pmentioning

confidence: 99%

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A Novel Approach for Microgrid Protection Based upon Combined ANFIS and Hilbert Space-Based Power Setting

Abdulwahid

Wang

2016

Energies

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“…As one of the core technologies of DFA, line current differential protection (LCDP) can identify the fault in multi-port protection areas and cope with multi-directional flow, and has been used in DFA systems extensively [6][7][8][9][10][11][12][13][14][15]. LCDP is a regional protection, which needs to acquire data from other protection devices (PDs) through communication, so the design of a communication system is an important part of it.…”

Section: Introductionmentioning

confidence: 99%

The Communication System and its Impacts on Line Current Differential Protection in Distributed Feeder Automation

Duan

Luo

et al. 2020

Energies

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As one of the core technologies of distributed feeder automation (DFA), line current differential protection (LCDP) can locate faults quickly and accurately and have the ability to cope with multi-directional flow. However, LCDP algorithm has high requirements for communication speed, and is sensitive to communication quality. In order to apply the LCDP algorithm to a real project, the communication system and its impacts on LCDP need to be studied in depth. In this paper, the design method of a communication system for LCDP, including communication mode, topology, communication protocol, and synchronization, is analyzed in detail. For better parameter determination, the communication models are investigated, and the impact of time delay, data loss, and jitter on LCDP are discussed. Further, the distribution network based on a real project is built in a cyber-physical co-simulation environment, and the impact of electrical fails and communication fails on LCDP are studied. The results show that the design method and parameters determination method proposed in this paper are effective.

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“…This method is complex and suffers from unsatisfactory reliability and high cost due to the differential protection used. The authors in [23] used differential protection as a foundation and tried to improve it by using Hilbert space and fuzzy processes. This method still suffers from the same cost and reliability issues as pure differentials due to the use of differentials.…”

Section: Introductionmentioning

confidence: 99%

Model-Based Fault Detection of Inverter-Based Microgrids and a Mathematical Framework to Analyze and Avoid Nuisance Tripping and Blinding Scenarios

et al. 2018

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Abstract:Traditional protection methods such as over-current or under-voltage methods are unreliable in inverter-based microgrid applications. This is primarily due to low fault current levels because of power electronic interfaces to the distributed energy resources (DER), and IEEE1547 low-voltage-ride-through (LVRT) requirements for renewables in microgrids. However, when faults occur in a microgrid feeder, system changes occur which manipulate the internal circuit structure altering the system dynamic relationships. This observation establishes the basis for a proposed, novel, model-based, communication-free fault detection technique for inverter-based microgrids. The method can detect faults regardless of the fault current level and the microgrid mode of operation. The approach utilizes fewer measurements to avoid the use of a communication system. Protecting the microgrid without communication channels could lead to blinding (circuit breakers not tripping for faults) or nuisance tripping (tripping incorrectly). However, these events can be avoided with proper system design, specifically with appropriately sized system impedance. Thus, a major contribution of this article is the development of a mathematical framework to analyze and avoid blinding and nuisance tripping scenarios by quantifying the bounds of the proposed fault detection technique. As part of this analysis, the impedance based constraints for microgrid system feeders are included. The performance of the proposed technique is demonstrated in the MATLAB/SIMULINK (MathWorks, Natick, MA, USA) simulation environment on a representative microgrid architecture showing that the proposed technique can detect faults for a wide range of load impedances and fault impedances.

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A new differential protection scheme for microgrid using Hilbert space based power setting and fuzzy decision processes

Cited by 14 publications

References 11 publications

A Novel Approach for Microgrid Protection Based upon Combined ANFIS and Hilbert Space-Based Power Setting

A Novel Approach for Microgrid Protection Based upon Combined ANFIS and Hilbert Space-Based Power Setting

The Communication System and its Impacts on Line Current Differential Protection in Distributed Feeder Automation

Model-Based Fault Detection of Inverter-Based Microgrids and a Mathematical Framework to Analyze and Avoid Nuisance Tripping and Blinding Scenarios

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