scholarly journals New Monitoring System for Photovoltaic Power Plants’ Management

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2495 ◽  
Author(s):  
Václav Beránek ◽  
Tomáš Olšan ◽  
Martin Libra ◽  
Vladislav Poulek ◽  
Jan Sedláček ◽  
...  
Keyword(s):  
Monitoring System ◽  
Power Plants ◽  
Data Logger ◽  
The Czech Republic ◽  
System Parameters ◽  
Photovoltaic Arrays ◽  
Photovoltaic Power ◽  
Processing Data ◽  
Expected Values ◽  
Important System

An innovative solar monitoring system has been developed. The system aimed at measuring the main parameters and characteristics of solar plants; collecting, diagnosing and processing data. The system communicates with the inverters, electrometers, metrological equipment and additional components of the photovoltaic arrays. The developed and constructed long working system is built on special data collecting technologies. At the generating plants, a special data logger BBbox is installed. The new monitoring system has been used to follow 65 solar plants in the Czech Republic and elsewhere for 175 MWp. As an example, we have selected 13 PV plants in this paper that are at least seven years old. The monitoring system contributes to quality management of plants, and it also provides data for scientific purposes. Production of electricity in the built PV plants reflects the expected values according to internationally used software PVGIS (version 5) during the previous seven years of operation. A comparison of important system parameters clearly shows the new solutions and benefits of the new Solarmon-2.0 monitoring system. Secured communications will increase data protection. A higher frequency of data saving allows higher accuracy of the mathematical models.

scholarly journals Performance Problem of Current Differential Protection of Lines Emanating from Photovoltaic Power Plants

2020 ◽  
Vol 12 (4) ◽  
pp. 1436
Author(s):  
Yingyu Liang ◽  
Wulin Li ◽  
Guanjun Xu
Keyword(s):  
Control System ◽  
Phase Angle ◽  
Power Plants ◽  
Power Grid ◽  
Fault Current ◽  
Differential Protection ◽  
System Parameters ◽  
Photovoltaic Power ◽  
Current Differential Protection ◽  
Performance Problem

The amplitude and phase angle of the fault current in photovoltaic power plants (PVPPs) are significantly influenced by the control system of the grid-connected inverters, unlike in a conventional synchronous source. Hence, PVPPs may adversely affect the performance of the current differential protection designed for synchronous sources-based power grids. In order to study the performance problem of current differential protection on AC transmission lines, an analytical expression of the fault current in the PVPPs was deduced, and the fault current characteristic was extensively analyzed. Based on this analysis, the ratio of differential current over restraint current was initially derived in this study; this ratio is observed to be affected by the control system parameters, power grid system parameters, fault resistance, and fault types. Moreover, the dynamic characteristics of this ratio can be clearly observed based on a three-dimensional diagram. Furthermore, the operating performance of the current differential protection was analyzed under different influencing factors. The mathematical analysis presents that the amplitude ratio of the fault current on both sides of the line is larger than nine and that current differential protection will operate reliably in any case. Meanwhile, the theoretical analysis and simulation results show that the current phase angle difference may become an obtuse angle in case of an ungrounded fault, which will cause inaccurate operation of the current differential protection. The results of this study will provide guidance for the engineering application of current differential protection in case the PVPPs are connected to a power grid.

scholarly journals Monitoring of Defects of a Photovoltaic Power Plant Using a Drone

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 795 ◽  
Author(s):  
Martin Libra ◽  
Milan Daneček ◽  
Jan Lešetický ◽  
Vladislav Poulek ◽  
Jan Sedláček ◽  
...  
Keyword(s):  
Power Plant ◽  
Monitoring System ◽  
Power Plants ◽  
Life Sciences ◽  
Electric Energy ◽  
Infrared Camera ◽  
Data Monitoring ◽  
Large Area ◽  
The Czech Republic ◽  
Pv Panel

Drone infrared camera monitoring of photovoltaic (PV) power plants allows us to quickly see a large area and to find the worst defects in PV panels, namely cracked PV cells with broken contacts. Roofs are suitable for the integration of PV power plants into buildings. The power plant at the Czech University of Life Sciences in Prague, which was monitored by this method, does not show any significant defects, and the produced electric energy exceeds the expected values. On the contrary, the PV power plant in Ladná has visible defects, and the data monitoring system Solarmon-2.0 also indicates defects. Our newly developed data monitoring system Solarmon-2.0 has been successfully used in 65 PV power plants in the Czech Republic and in many PV power plants throughout the world. Data are archived and interpreted in our dispatch area at the Czech University of Life Sciences in Prague. The monitoring system can report possible failure(s) if the measured amount of energy differs from the expected value(s). The relation of the measured values of PV power to the PV panel temperature is justified, which is consistent with the physical theory of semiconductors.

scholarly journals MODEL DATA LOGGER UNTUK MENGUKUR ARUS, TEGANGAN, DAN DAYA PADA SIMULASI PEMBANGKIT LISTRIK TENAGA ANGIN DAN SURYA MENGGUNAKAN ANDROID

Petir ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 1-9
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Power Plant ◽  
Monitoring System ◽  
Power Plants ◽  
Digital Data ◽  
Android Application ◽  
Data Logger ◽  
Current Voltage ◽  
Application Programming ◽  
System Data ◽  
Arduino Microcontroller

Monitoring System data at a power plant is the most important part in controlling and supervising a power plant. But in fact its technology monitoring system is still a lot of weakness. This thesis aims to innovate in reading current, voltage, and power at power plants by creating a data logger models that utilize the Arduino microcontroller. Current and voltage will be read by the ACS712 current sensor, then the value of current and voltage will be processed by the Arduino to be changed from analog data into digital data. Once the data is processed and the data will be sent to the Web Server as a database via GPRS Module by utilizing the internet signal. Applications designed on this system using a mobile based application programming android. Application as a user interface making it easier to monitor the generation of data in realtime via android smartphone. Then the data will be processed by the application so that it can be used to view history data readout and print reports. So later this monitoring system will be used to check power at a power plant using only virtual android smartphone and can be accessed anywhere.

scholarly journals Capacity of photovoltaic power plants in the Czech Republic

2014 ◽  
Vol 11 (3) ◽  
pp. 480-486 ◽  
Author(s):  
Michal Gallay ◽  
Ján Kaňuk ◽  
Jaroslav Hofierka
Keyword(s):  
Czech Republic ◽  
Power Plants ◽  
The Czech Republic ◽  
Photovoltaic Power
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