Alleviation of the transients induced in large photovoltaic power plants by direct lightning stroke

Said, Abdelrahman; Abd-Allah, M.A.; Mohsen, Moustafa; Omar, Ahmed I.

doi:10.1016/j.asej.2022.101880

Cited by 14 publications

(10 citation statements)

References 25 publications

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“…The AGC system receives the frequency and power signals of the grid-connected point of the photovoltaic power station, determines and calculates as required, and sends the power adjustment command to the photovoltaic inverter through the communication unit [15][16][17][18].…”

Section: Retrofit Of Agc Systemmentioning

confidence: 99%

“…The AGC system receives the frequency and power signals of the grid‐connected point of the photovoltaic power station, determines and calculates as required, and sends the power adjustment command to the photovoltaic inverter through the communication unit [15–18]. Key technical points: The frequency measurement accuracy and frequency sampling period of the existing photovoltaic power station measurement and control devices are mostly unable to meet the fast frequency response requirements.…”

Section: Fast Frequency Response Technology Of Photovoltaic Power Sta...mentioning

confidence: 99%

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Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Yin

2023

The Journal of Engineering

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With the centralized access of large capacity and high proportion of new energy to the power grid, the power structure has undergone great changes, and the fast frequency response resources available to the power grid have gradually decreased. If high-power DC blocking occurs, it will pose a serious threat to the frequency security of the power grid, and the frequency regulation pressure of the power grid and the risk of safe operation will continue to increase. To this end, a fast frequency response technology for photovoltaic power plants based on equivalent modelling is proposed. According to the principle of equivalent modelling, the equivalent model of a single unit of photovoltaic power station is established through the parameters of photovoltaic array, photovoltaic inverter, unit transformer, unit transformer and collector line. According to the fast frequency response performance requirements of photovoltaic power plants, combined with the characteristics of photovoltaic power plants, a feasible scheme for fast frequency response of photovoltaic power plants is introduced. The case study on the implementation of fast frequency response project in photovoltaic power station shows that according to the order and type of AGC command and fast frequency response command, photovoltaic power station has conducted command superposition tests under 50 ±0.2 Hz and 50 ±0.09 Hz disturbance amplitudes respectively, and the results are qualified. The integration of automatic generation control/automatic voltage control (AGC/AVC) and fast frequency response function of photovoltaic power station is realized by using relevant technologies, so that the photovoltaic power station can actively support the grid frequency and voltage.

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Section: Retrofit Of Agc Systemmentioning

confidence: 99%

Section: Fast Frequency Response Technology Of Photovoltaic Power Sta...mentioning

confidence: 99%

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Yin

2023

The Journal of Engineering

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“…Where the air termination that the ILS impacted is assembled with a down conductor, the ILS current finds more than one path through the system, either the SPDs or R g . The general specifications of the PV system are listed in Tables 2 and 3 [13].…”

Section: Solar Pv Plant Overviewmentioning

confidence: 99%

“…The PV system's components modeling parameters used in PSCAD are enumerated for each element in Table 4 and Table 5 with the aid of the parameters listed in Table 2 and Table 3 [13]. The SPD's (I-V) characteristic data are listed in Table 6.…”

Section: Solar Pv Plant Modellingmentioning

confidence: 99%

“…Due to its constrained simulation run points, PSCAD's lengthy EMTDC run time is reduced using this system reduction technique. The system was validated in [13], where the steady-state waveforms with time for the array voltage, current, and power at P1 in the PV farm shown in Fig. 6 and the output AC voltage and current following the VSC are noted.…”

Section: A Behavior Of Pv Power Plant Under Normal Operationmentioning

confidence: 99%

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Induced Overvoltage Caused by Indirect Lightning Strikes in Large Photovoltaic Power Plants and Effective Attenuation Techniques

et al. 2022

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Indirect Lightning Stroke (ILS) is considered an urgent issue on overall power systems due to its sudden dangerous occurrence. A grid-connected solar Photovoltaic (PV) power plant of 1MW was considered and analyzed using PSCAD/EMTDC software. The effect of grounding grid resistance (R g ) on the induced voltages caused by the indirect strokes was discussed. The Transient Grounding Potential Rise (TGPR) variation with R g was presented and discussed. Four different models were proposed and installed for the system under study, which includes a combination of the Externally Gapped Line Arrester (EGLA) with the Non-Gapped Line Arrester (NGLA). The results show that when the R g was reduced from 5 to 1 ohm, TGPR decreased by about 79.63%, whereas the peak value was reduced by about 91.3% nearby the striking position. Four models of EGLAs were proposed to reduce the induced transient overvoltage effectively. The four models showed a remarkable ability to reduce the backflow current (BFC) and, consequently, the induced overvoltage. The EGLA's type with the composite air gap reduced the TGPR by about 77.04 % and reduced the induced overvoltage nearby the striking position by about 51.3%.INDEX TERMS ILS, EGLA, NGLA, backflow current (BFC), PV, grounding grid design (GGD), composite insulator, discharge voltage.

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Adaptive real-time protection scheme for distribution networks with high penetration levels of renewable energy resources

Wadie

Abdulgawad

Abd-Allah

2023

Ain Shams Engineering Journal

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Alleviation of the transients induced in large photovoltaic power plants by direct lightning stroke

Cited by 14 publications

References 25 publications

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Induced Overvoltage Caused by Indirect Lightning Strikes in Large Photovoltaic Power Plants and Effective Attenuation Techniques

Adaptive real-time protection scheme for distribution networks with high penetration levels of renewable energy resources

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