The conducted emission noise caused by the inverter in the off-grid photovoltaic (PV) system has been characterized. Noise that propagates in the conduction path was generated from the phenomenon of inverter switching for the power conversion process from direct current (DC) to alternating current (AC). The IEC 62920: 2017 and CISPR 25: 2016 standards were used to measure the noise generated by the inverter on the DC side. The conducted emission noise measurements for the inverter were carried out in three conditions, namely no-load condition, connected to a 60 W incandescent lamp load, and connected to the incandescent lamp load and dimmer for power variation. Measurements were made on five inverters with different power capacities and output types. The 200 W, 300 W, and 700 W outputs were for the modified sine wave output voltage, while the 500 W and 1,000 W were for pure sine wave output voltage. The measurement results show that when the inverter is connected to the load of the incandescent lamp and the dimmer, the 500 W and 1,000 W pure sine wave inverters have a low peak noise level and less potential to cause electromagnetic interference on the DC side.

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Karakterisasi Conducted Emission Noise pada Inverter di Sistem Photovoltaic Off-Grid

Artificial Network used to measure conducted emission noise on the DC side due to the use of photovoltaic inverters (DC-AN) has been characterized based on impedance and insertion loss using analytical method. Impedance and insertion loss compatibility requirements are regulated by CISPR standard 16-1-2:2014 to provide matching impedance with DC source and Equipment Under Test (EUT) in the radio frequency range from 150 kHz to 30 MHz. Circuit analysis using node analysis and loop analysis in the form of Laplace Transform is used to obtain the frequency response equations of impedance and insertion loss. Furthermore, the verification of the analytical method results is done by comparing it with the simulation method and the proposed DC-AN design based on analytical method has been made to validate DC-AN characteristic required by the standard. Finally, it could be concluded that the characteristics of DC-AN with analytical method are very close to the results of simulation method and the characteristic of the proposed DC-AN design is still within the tolerance limits allowed by the standard, which is ± 20% of the required impedance exact value and it has an insertion loss around of below -40 dB so it could be used to measure conducted emission noise.

S. P. Bambang Anggoro

Papers

Characterization of DC Artificial Network Using Analytical Method for Conducted Emission Measurement of Photovoltaic Inverter