Protection Method for Radial Distribution Systems With DG Using Local Voltage Measurements

Jamali, S.; Borhani-Bahabadi, Hossein

doi:10.1109/tpwrd.2018.2889895

Cited by 53 publications

(25 citation statements)

References 27 publications

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“…According to Table 1, both DG‐based and the protection system (PS)‐based strategies can be implemented in an offline 15,22‐24 or online 8,25‐30 manner. In the offline methods, the coordination of protection devices is ensured in sizing and siting of DGs in the planning stage 6,31‐33 or output of DGs in operation stage 8,34‐36 . However, these methods may limit the penetration of DGs which in turn result in dissatisfaction of consumers and DG owners.…”

Section: Introductionmentioning

confidence: 99%

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

Bisheh

Fani

Shahgholian

2021

Int Trans Electr Energ Syst

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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.

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Section: Introductionmentioning

confidence: 99%

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

Bisheh

Fani

Shahgholian

2021

Int Trans Electr Energ Syst

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“…the protection scheme only using local information or via increasing the cooperation time between the protections at the upper and lower lines [5]- [8].…”

Section: Introductionmentioning

confidence: 99%

Improved Amplitude Differential Protection Scheme Based on the Frequency Spectrum Index for Distribution Networks With DFIG-Based Wind DGs

2020

IEEE Access

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With the ever-increasing integration of wind power into the distribution network (DN) in the form of distributed generations (DGs), the optimal application environment for the conventional three-stage overcurrent protection no longer exists. Meanwhile, a majority of advanced protection schemes cannot be implemented due to the lack of voltage information and weak communication conditions in DN. As the most typical wind-based DG used in the DN, the doubly fed induction generator (DFIG)-based DG is focused in this paper. First, the frequency and amplitude characteristics of the fault current supplied by a DFIG-based DG are studied. Then, the amplitude differential protection (ADP) scheme is described using the weak-infeed characteristics of the DFIG-based DG. Furthermore, the frequency spectrum index, which is constructed based on the different frequency characteristics of DFIG-based DGs from synchronous generators, is introduced as a regulator factor to further improve the sensitivity of the ADP. Since only the current amplitude information is needed and the strict synchronization of the sampling data at the two ends of the line is not required, the proposed scheme is easy to implement under the limited hardware conditions in present DN. The simulation results show that the proposed scheme has a high sensitivity to the internal faults and has absolute selectivity for external faults, especially under the existing DG permeability rules. INDEX TERMS Distribution network (DN), distributed generations (DGs), doubly fed induction generator (DFIG), amplitude differential protection (ADP), weak-infeed characteristics, frequency spectrum index.

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“…There are different solutions proposed in the literature to deal with the protection challenge of microgrids, including adaptive overcurrent methods, directional element method, differential‐based methods, voltage‐based methods, and data mining‐based methods …”

Section: Introductionmentioning

confidence: 99%

“…This method may cause the relay operation under normal events such as motor starting or load switching. Jamali et al propose a non‐standard time‐voltage characteristic for relays to protect microgrids without a communication link. However, this method does not consider normal events that can cause voltage sags, which could lead to incorrect operation for any voltage drop.…”

Section: Introductionmentioning

confidence: 99%

Identification of faulted line section in microgrids using data mining method based on feature discretisation

Jamali

Ranjbar

Bahmanyar

2020

Int Trans Electr Energ Syst

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Summary Protection is the main challenge for the operation of microgrids. This paper presents a new data mining method for identification of faulted line section for the protection of microgrids. This method uses wavelet packet transform (WPT) to extract a set of features from the fault voltage and current waveforms. The features are then pre‐processed and used for identifying the faulted line section through classification. Three classifiers are examined in this paper. In order to improve the classifiers performance, two pre‐processing steps are applied on the features. First, using three different feature selection methods, the irrelevant and redundant features are removed from the feature set. Secondly, using a supervised discretisation technique, the continuous features are converted into finite interval features. The performance of the proposed method is investigated and compared with previous methods using extensive simulation study on a complex microgrid. The results indicate that with only six discretised features, the proposed method has a fast and accurate performance by using the three classifiers examined, whereas one is more effective. Moreover, the proposed method only uses the measurement at the main substation, obviating the need for communication links to exchange data as used by most previous methods.

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Protection Method for Radial Distribution Systems With DG Using Local Voltage Measurements

Cited by 53 publications

References 27 publications

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

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

Improved Amplitude Differential Protection Scheme Based on the Frequency Spectrum Index for Distribution Networks With DFIG-Based Wind DGs

Identification of faulted line section in microgrids using data mining method based on feature discretisation

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