Integrated step‐up non‐isolated inverter with leakage current elimination for grid‐tied photovoltaic system

Hu, Xuefeng; Liang, Wenjuan; Gao, Benbao; Ma, Penghui; Zhang, Yubo

doi:10.1049/iet-pel.2018.6183

Cited by 12 publications

(16 citation statements)

References 36 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The minimum level of the I CM is reported for the proposed converter, whereas Ma et al 42 presented the nearest leakage current to this converter, and other studies 43,44,47 presented the medium leakage current values. This parameter is high for Rahimi et al 39 This table also presents the common-mode voltage values for the presented inverter blocks.…”

Section: Simulation Results and Discussionmentioning

confidence: 60%

“…Figure 2F) HERIC ( Figure 2E) H6 ( Figure 2G) inverters can be found in previous studies. 39,[42][43][44][45][46][47] This table can give us the total cost of the converters and the output power value that the maximum of the efficiency is obtained. It means, for example, the efficiency will change in lower or higher power values.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…As the other approach for the transformer-less inverters that have been presented in the references herein 39,[45][46][47] and shown in Figure 2D-G, both of the inductors L A and L B are available and usually equal. According to Equations 3 and 4, for this state, V dm = 0.…”

Section: Generation and Elimination Of I C Mmentioning

confidence: 99%

“…These inverters are categorized as the asymmetric inductor inverter group because they have only one inductor at the filter side. Therefore, for these types of inverters by considering the L A = 0, Equation 6 is calculated:

V_{t, italiccm} = \frac{V_{AN} + V_{BN}}{2} + \frac{V_{AN} - V_{BN}}{2} ((), \frac{L_{B}}{L_{B}}) = V_{AN} = italiccte .

If we consider L B = 0,

V_{t, italiccm} = \frac{V_{AN} + V_{BN}}{2} + \frac{V_{AN} - V_{BN}}{2} ((), \frac{- L_{A}}{L_{A}}) = V_{BN} = italiccte .

As the other approach for the transformer‐less inverters that have been presented in the references herein 39,45–47 and shown in Figure 2D–G, both of the inductors L A and L B are available and usually equal. According to Equations 3 and 4, for this state, V dm = 0.…”

Section: Generation and Elimination Of Icmmentioning

confidence: 99%

See 3 more Smart Citations

An FPGA‐based switching photovoltaic‐connected inverter topology for leakage current suppression in grid‐connected utilizations

Ghaderi

2020

Circuit Theory & Apps

View full text Add to dashboard Cite

This study presents a symmetrical photovoltaic (PV)-connected inverter topology for eliminating the common-state leakage current in grid-connected inverters. A new inverter topology is introduced that minimizes the leakage current, increases efficiency, and is economically viable because it consists of six power switches and two power diodes that, compared with similar ones, consist of the same element numbers. In this inverter, power losses are lower than popular topologies such as H5, H6, and HERIC, and the voltage stresses of the switches are reduced. These features are due to the unique composition of the inverter branches and the location of the switches and diodes and the formation of a suitable freewheeling path for the current. The freewheeling path separates the alternating current (AC) side from the direct current side in the converter and cuts off the PV array leakage current to the AC grid. This will improve network reliability indices and maintain conservation standards. Finally, the content of this method is validated by comparing the proposed inverter with the existing conventional topologies. A prototype has been implemented for the performance analysis of the proposed inverter and results presented.

show abstract

Section: Simulation Results and Discussionmentioning

confidence: 60%

Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Generation and Elimination Of I C Mmentioning

confidence: 99%

V_{t, italiccm} = \frac{V_{AN} + V_{BN}}{2} + \frac{V_{AN} - V_{BN}}{2} ((), \frac{L_{B}}{L_{B}}) = V_{AN} = italiccte .

If we consider L B = 0,

V_{t, italiccm} = \frac{V_{AN} + V_{BN}}{2} + \frac{V_{AN} - V_{BN}}{2} ((), \frac{- L_{A}}{L_{A}}) = V_{BN} = italiccte .

Section: Generation and Elimination Of Icmmentioning

confidence: 99%

See 2 more Smart Citations

An FPGA‐based switching photovoltaic‐connected inverter topology for leakage current suppression in grid‐connected utilizations

Ghaderi

2020

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Even though, as the galvanic isolation is detached, leakage current appears because of parasitic capacitance of PV module and common mode voltage (CMV) of the inverter as presented in Fig. 2 [45,46]. This is because of the potential difference appears across the PV module and the grid neutral depending on switching of the inverter.…”

Section: Challenges Of Grid Connected Transformerless Invertersmentioning

confidence: 99%

Investigation of single‐stage transformerless buck–boost microinverters

Mathew

Naidu

2020

IET Power Electronics

View full text Add to dashboard Cite

The conventional microinverters with transformers and multiple-stage system increases the cost, weight and size, lowering the effectiveness and power density of PV system. It is therefore desirable to prevent using these methods for a microinverter. However, extra care must be taken to prevent component stress, excess switching and conduction losses, ground leakage currents and harmonics. Several transformerless buck-boost inverters have lately been suggested to address various issues. Due to the availability of a number of buck-boost inverter-topology for the solar PV system, it is often difficult to identify when to choose the appropriate topology. Therefore, in order to present a clear view of the advancement of transformerless buck-boost inverters for next-generation grid-integrated PV systems, this article seeks to explore multiple buck-boost topologies with an extensive analytical comparison. Computer simulations for the 70 W system have been conducted in PLECS software to strengthen the results and comparisons, as well as to provide more insight into the features of the distinct topologies for the building-integrated photovoltaic implementation. At the later part, voltage and current stress in each component, efficiency and total harmonic distortion of the system are provided with a general summary, as well as, a technology roadmap.

show abstract

A modified carrier-based PWM technique for minimization of leakage current in transformer less single-phase grid-tied PV system

et al. 2020

View full text Add to dashboard Cite

Integrated step‐up non‐isolated inverter with leakage current elimination for grid‐tied photovoltaic system

Cited by 12 publications

References 36 publications

An FPGA‐based switching photovoltaic‐connected inverter topology for leakage current suppression in grid‐connected utilizations

An FPGA‐based switching photovoltaic‐connected inverter topology for leakage current suppression in grid‐connected utilizations

Investigation of single‐stage transformerless buck–boost microinverters

A modified carrier-based PWM technique for minimization of leakage current in transformer less single-phase grid-tied PV system

Contact Info

Product

Resources

About