Investigations on EMI Mitigation Techniques: Intent to Reduce Grid-Tied PV Inverter Common Mode Current and Voltage

Subramaniam, Umashankar; Bhaskar, Sagar Mahajan; Almakhles, Dhafer; Padmanaban, Sanjeevikumar; Leonowicz, Zbigniew

doi:10.3390/en12173395

Cited by 13 publications

(8 citation statements)

References 48 publications

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“…The CE causes significant electrical damages and communication malfunctions in many systems [17][18][19][20][21][22][23][24]. To reduce the CE, there are several methods [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] with different signal attenuation patterns. Each electrical system has different CE characteristics, so the CE attenuation method must be appropriately chosen for each system.…”

Section: Literature Reviewmentioning

confidence: 99%

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The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems

Jettanasen

Ngaopitakkul

2019

Sustainability

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Road lighting systems require a significant amount of electric energy. To compensate for the utilized energy, the concept of a nanogrid road lighting system is presented. A solar panel is installed on the top of a lighting pole to generate electric power. In this research, a photovoltaic simulator (PV simulator), which is used to simulate solar behavior such as current, voltage, and power based on temperature and solar irradiance levels, is employed to replace a solar panel. In the nanogrid system, grid-connected and stand-alone micro-inverters are employed to convert the electric power. The inverters comprise switching devices that can generate electromagnetic interference (EMI) when operating, which is harmful to the grid system and the electrical equipment. In general, EMI has been studied and reduced in electrical appliances, which only receive electric power. However, for the nanogrid system, which supplies electricity to the grid system, there is less study on the EMI topic because the usage is still not widespread. In the future, the nanogrid system will be widely used delivering high power directly into the electrical grid system. Therefore, the study and attenuation of EMI in the nanogrid system are very promising. Conducted emission (CE) is one form of EMI that flows through a cable connecting several appliances in the frequency range of 150 kHz to 30 MHz. CE of grid-connected and stand-alone micro-inverters have high levels in the low-frequency range between 150 kHz–5 MHz and then decreases steadily. CE attenuation is important for this inverter in a solar power system. This research studies the effect of CE mitigation on the nanogrid system. The result is compared with the Comité International Spécial des Perturbations Radio (CISPR) 14-1 standard. Finally, the passive EMI filter can reduce CE and meets the CISPR 14-1 standard.

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Section: Literature Reviewmentioning

confidence: 99%

“…CM and DM were analyzed and discussed in detail to design the EMI filter. The research of Subramaniam et al [31] presented the CM reduction in the three-phases grid-tie inverter. The result showed that the harmonic injection method reduced CMV and CMC by 60%.…”

Section: Literature Reviewmentioning

confidence: 99%

The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems

Jettanasen

Ngaopitakkul

2019

Sustainability

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“…Nowadays, renewable energy sources play a key role in supporting the power system to adapt the ever-increasing load demand. Among the renewable energy sources, the PV source is considered as one of the most effective solutions due to its relatively small size, clean energy, noiseless operation, and simple installation [1][2][3][4]. To connect the PV array with a utility grid, grid-connected inverters are widely used for the PV systems and are divided into the transformer-based and transformerless topologies [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Among the renewable energy sources, the PV source is considered as one of the most effective solutions due to its relatively small size, clean energy, noiseless operation, and simple installation [1][2][3][4]. To connect the PV array with a utility grid, grid-connected inverters are widely used for the PV systems and are divided into the transformer-based and transformerless topologies [4][5][6][7][8][9]. The use of a high-frequency transformer on the DC side or a low-frequency, bulky transformer in the AC side can be employed to ensure the safety issue with the galvanic isolation between the output and input sides [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Topology Review of Three-Phase Two-Level Transformerless Photovoltaic Inverters for Common-Mode Voltage Reduction

et al. 2022

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In grid-connected photovoltaic (PV) systems, a transformer is needed to achieve the galvanic isolation and voltage ratio transformations. Nevertheless, these traditional configurations of transformers increase the weight, size, and cost of the inverter while decreasing the efficiency and power density. The transformerless topologies have become a good solution. However, the problem is that commode-mode voltage and leakage current can occur via the stray capacitors between the PV array and the ground of the inverter. Various transformerless inverters have been introduced with different techniques, such as reducing the common-mode voltage or eliminating the leakage current. Furthermore, to introduce the development of transformerless PV inverters, especially in three-phase two-level inverter systems, this paper provides a comprehensive review of various common-mode voltage reduction three-phase two-level inverters.

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“…Moreover, in case the centralized rectifier fails, the common DC-bus can be powered by battery connected to the DC-link system which can provide sufficient power to continue the load system at the same operating conditions (in the meantime it is possible to do maintenance of the rectifier system). Additionally, it is possible to connect renewable energy resources such as PV inverters due to their DC nature with ease at the common DC-bus of the multidrive system [10,11] and [7,12], [J2] shown in Fig. 1.3. Despite the above stated benefits, one of the main challenges of the multidrive system is the presence high DC-link current harmonics content in the system [13][14][15] which may cause failure of fragile components such as DC-link capacitors [2,16].…”

Section: Common Parallel Connected Multidrive Systemmentioning

confidence: 99%

DC-link Harmonic Current Mitigation Strategies for Improvement of DC-link Capacitor Lifetime in a Multidrive System

Baburajan¹

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Investigations on EMI Mitigation Techniques: Intent to Reduce Grid-Tied PV Inverter Common Mode Current and Voltage

Cited by 13 publications

References 48 publications

The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems

The Conducted Emission Attenuation of Micro-Inverters for Nanogrid Systems

Topology Review of Three-Phase Two-Level Transformerless Photovoltaic Inverters for Common-Mode Voltage Reduction

DC-link Harmonic Current Mitigation Strategies for Improvement of DC-link Capacitor Lifetime in a Multidrive System

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