Towards next generation photovoltaic inverters

Xue, Yaosuo; Divya, K.C.; Griepentrog, Gerd; Mihalache, Liviu; Suresh, Sindhu; Manjrekar, Madhav

doi:10.1109/ecce.2011.6064096

Cited by 118 publications

(74 citation statements)

References 30 publications

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“…Moreover, the boundaries of the grid voltage and frequency are also specified. In response to the abnormal grid conditions, the PV systems are currently required to disconnect from the distributed grid for safety concern [10]- [18], also known as the islanding protection.…”

Section: Introductionmentioning

confidence: 99%

“…In light of this thriving situation, a typical anti-islanding disconnection may impose severe challenges for the whole power system, especially for the end-consumers' equipment. For instance, an anti-islanding operation that results in the disconnection of PV systems may cause voltage flickers, low voltage and power quality problems for the customers, leading to the loss of customers' money and the necessity to limit PV integration for a DSO [10], [18], [22].…”

Section: Introductionmentioning

confidence: 99%

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Suggested grid code modifications to ensure wide-scale adoption of photovoltaic energy in distributed power generation systems

Yang

Enjeti²,

Blaabjerg

et al. 2013

2013 IEEE Industry Applications Society Annual Meeting

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Abstract-Current grid standards seem to largely require low power (e.g. several kilowatts) single-phase photovoltaic (PV) systems to operate at unity power factor with maximum power point tracking, and disconnect from the grid under grid faults. However, in case of wide-scale penetration of single-phase PV systems in the distributed grid, the disconnection under grid faults can contribute to: a) voltage flickers, b) power outages, and c) system instability. In this paper, grid code modifications are explored for wide-scale adoption of PV systems in the distribution grid. More recently, Italy and Japan, have undertaken a major review of standards for PV power conversion systems connected to low voltage networks. In view of this, the importance of low voltage ride-through for singlephase PV power systems under grid faults along with reactive power injection is studied in this paper. Three reactive power injection strategies are discussed in detail. Simulations are presented for a PV power system with low voltage ride-through capability and ancillary services. An example of a full-bridge single-phase grid-connected system is tested experimentally to demonstrate the potential benefits.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Suggested grid code modifications to ensure wide-scale adoption of photovoltaic energy in distributed power generation systems

Yang

Enjeti²,

Blaabjerg

et al. 2013

2013 IEEE Industry Applications Society Annual Meeting

View full text Add to dashboard Cite

show abstract

“…a capacitor) [2]. Many consider these DC bus capacitors to be the weak link in inverter reliability [3] due to constant temperature and power cycling and high internal capacitor temperatures. According to SunEdison, over a 27-month period, capacitor issues were responsible for 7% of inverter energy loss due to maintenance and downtime [4].…”

Section: Introductionmentioning

confidence: 99%

Lifetime testing of metallized thin film capacitors for inverter applications

Flicker

Kaplar

Marinella

et al. 2013

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)

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In order to understand the degradation mechanisms and failure precursors of metallized thin film capacitors (MTFC) used in photovoltaic (PV) inverters, we have carried out accelerated testing on MTFCs. By understanding the degradation mechanisms and precursors of imminent catastrophic failure, implementation of a prognostics and health management (PHM) plan can be used to optimize PV array operations and maintenance (O&M), decreasing cost per watt towards the US Department of Energy goals.

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“…One of the advanced features for PV inverters is to statically support the grid by appropriately controlling the active power and exchanging the reactive power [4], and also to ride-through transient grid disturbances [27]- [29]. Thus, the future PV systems have to remain connected to the grid during low-voltage transients and also to support the grid voltage recovery by injecting reactive power into the grid.…”

Section: Operating Condition Effects On Capacitorsmentioning

confidence: 99%

“…The next-generation PV inverters have to be of much power controllability and flexibility in order to integrate into the conventional grid smoothly with reduced cost of PV energy [26], [27]. One of the advanced features for PV inverters is to statically support the grid by appropriately controlling the active power and exchanging the reactive power [4], and also to ride-through transient grid disturbances [27]- [29].…”

Section: Operating Condition Effects On Capacitorsmentioning

confidence: 99%