Technique for Fast Detection of Short Circuit Current in PV Distributed Generator

Varma, Rajiv K.; Rahman, Shah Arifur; Atodaria, V. H. Atodaria V. H.; Mohan, Sibin; Vanderheide, Tim

doi:10.1109/jpets.2016.2592465

Cited by 38 publications

(26 citation statements)

References 28 publications

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“…High computational load determining new system state and parameters. Optimal placement of FCLs [13,45,46] Minimise change to system fault levels. Preserve original protection settings.…”

Section: Optimal Protection Relay Coordinationmentioning

confidence: 99%

“…Depending on the system requirements, inverter-interfaced DG may be operated under power factor or voltage control mode [13]. Operation under FRT regime forces the control strategy to rapidly respond to limit the fault current contribution of the DG [79,80].…”

Section: Inverter Current Control-based Protection Strategiesmentioning

confidence: 99%

“…In particular, the protection and circuit breakers must act quickly to remove the fault to enable recovery of the system. Researchers in [13] proposed a fast fault detection technique for PV DG (PV-DG) based on the rate of rising of current. The technique can quickly detect the fault and transform the PV-DG into a dynamic reactive power compensator (PV-STATCOM) and provide grid support such as FRT.…”

Section: Frt Requirementsmentioning

confidence: 99%

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Review of technical issues influencing the decoupling of DG converter design from the distribution system protection strategy

Manditereza

Bansal

2018

IET Renewable Power Generation

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Several issues need to be considered in the design and control of converters for converter-interfaced distributed generators (DGs). Under fault conditions, the semiconductor devices withstand ratings must not be exceeded. The converter control strategy is also required to facilitate fault ride through (FRT) capability. On the other hand, protection against fault is better served by employing control strategies that allow the converter-interfaced DGs to contribute short duration fault current sufficient to aid the detection of faults. Semiconductor devices protection and FRT capability have the same objective of limiting the magnitude of the fault current. Protection coordination in the complex DG-integrated network is difficult and may result in protection settings that are not optimal or contribute to long relay operating times that may impact FRT support. On this basis, this study proposes the de-coupling of the protection solution from FRT and semiconductor device considerations. This study critically reviews various strategies proposed in the literature for the protection of the DG-integrated distribution system and develops an argument that aims to influence a paradigm shift towards voltage-based protection that may see protection design decoupled from inverter design and control, since fault current contribution may not be required to achieve effective protection.

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“…High computational load determining new system state and parameters. Optimal placement of FCLs [13,45,46] Minimise change to system fault levels. Preserve original protection settings.…”

Section: Optimal Protection Relay Coordinationmentioning

confidence: 99%

Section: Inverter Current Control-based Protection Strategiesmentioning

confidence: 99%

Section: Frt Requirementsmentioning

confidence: 99%

See 1 more Smart Citation

Review of technical issues influencing the decoupling of DG converter design from the distribution system protection strategy

Manditereza

Bansal

2018

IET Renewable Power Generation

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“…To address this problem, several solutions have been presented in the literature that can be categorized into seven groups as follows. (i)Disconnection of all DG units before the unnecessary operation of the faulty lateral fuse is proposed in Ebrahimpour et al 3 and Varma et al 4 In addition to the need for fast disconnection of DG units, it results in loss of generation. Also, the re‐connection of DGs is a time‐consuming process due to the need for a synchronization mechanism 5 …”

Section: Introductionmentioning

confidence: 99%

Fuse saving scheme in highly photovoltaic‐integrated distribution networks

Hajimohammadi

Fani

Sadeghkhani

2019

Int Trans Electr Energ Syst

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Summary The high penetration level of photovoltaic (PV) units increases their injected fault current that it may result in fuse‐recloser miscoordination in distribution networks. The conventional coordination techniques are based on shifting the fast operation curve of the recloser below the characteristic curve of the fuse for fuse saving in the case of a temporary fault. However, these techniques save fuse if the slopes of fuse and recloser characteristic curves are same. Also, in the case of the high penetration level of PV systems, the conventional schemes are not effective. To address these problems, this paper proposes two fuse saving strategies that not only modify the difference between the slopes of fuse and recloser characteristic curves but also are effective for various penetration levels of PV units in the distribution network. The proposed protection scheme does not require the communication infrastructure and can be implemented in both conventional and digital reclosers installed in the distribution network. The reliable performance of the proposed fuse saving strategies is assessed on the simulation model of the Isfahan distribution network.

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“…Fig. 1 shows the common topologies for the module integrated converters [1,2]. To meet the requirements for high-power applications, the converters are connected in series or in parallel.…”

Section: Introductionmentioning

confidence: 99%

Improved solar system with maximum power point tracking

Hua

Fang

Wong

2018

IET Renewable Power Generation

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This study presents an improved solar system with maximum power point tracking (MPPT). A digital signal processor is used to control the converter with the proposed control; thus, the system can implement MPPT independently for each solar panel whether it is under shading, various irradiation conditions or with faulty solar cells. A modified MPPT method is designed to reduce the power oscillation significantly, thus the power loss is reduced. With the proposed scheme, most of the solar panel available output power is delivered to the load only through a diode, reducing the converter power loss. In addition, the converter only handles part of the solar panel output power. Therefore, the system cost is reduced due to the low-power rating converter. A laboratory prototype is constructed and tested to evaluate the effectiveness of the proposed system. The proposed photovoltaic (PV) system and the PV balancer are compared through simulations and experiments under various shading conditions. The experimental results show that the proposed PV system can produce more output power with high efficiency.

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Technique for Fast Detection of Short Circuit Current in PV Distributed Generator

Cited by 38 publications

References 28 publications

Review of technical issues influencing the decoupling of DG converter design from the distribution system protection strategy

Review of technical issues influencing the decoupling of DG converter design from the distribution system protection strategy

Fuse saving scheme in highly photovoltaic‐integrated distribution networks

Improved solar system with maximum power point tracking

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