Grid operators employ a wide range of signals that are required for feed-in management and that are used to send commands and the response signals. The Solar-Log™ PM Package is a single system to implement the various requirements with minimum effort. The PM Package consists of I/O Boxes and PM profiles. The I/O Boxes are a flexible gateway between remote control technology and the Solar-Log 1900 PM+ and Solar-Log 2000 PM+. The input and output signals from the I/O Boxes are defined by the PM profile according to the grid operator requirement.
|Inputs||up to 4 analog and up to 9 digital|
|Outputs||up to 3 analog and up to 10 digital|
|Rated operating voltage|
|Compatibility||Solar-Log 1900 PM+, Solar-Log 2000 PM+|
*The operator specific PM+ profile needs to be ordered.
By using SCBs, the DC output from the individual strings is switched in parallel and connected to the central inverter. Recording the power per string and the transmission of the SCB measurements allows for performance monitoring at the string level.
The Solar-Log™ combined with the Solar-Log WEB Enerest™ monitors and compares every individual string, ensuring reliable and precise PV plant monitoring. The currents from the individual strings are compared with each other for error identification and localization. Disturbances that result in yield decreases are immediately detected and can be fixed.
The Solar-Log™ Utility Meter is a universal metering device. It can be integrated in both low- and medium-voltage networks (via a transformer) and is needed for various tasks. In addition to voltage-dependent reactive power control Q(U), it is also used for reactive power control at the feeding point and to record the data that is needed consumption meter for heavy loads.
|Voltage measurement||17 V-520 V L-L, 4 inputs|
|Current measurement||Max. 5A|
|Rated operating voltage||135-340 VDC voltage supply|
|Mounting||Top hat rails, 95-240 VAC / |
135-340 VDC voltage supply
|Compatibility||Solar-Log Base, 300, 1200, 1900 and 2000|
In some countries, the grid network capacity for feed-in energy produced by a solar PV installation is becoming more of a concern, with some G59/3 applications even being rejected completely by the responsible DNO. In other areas, grid saturation constraints lead to stipulated maximum reverse power limits imposed by the DNO, which is often far less than the peak theoretical limit that the Solar PV array can produce.
The Solar-Log™ PM Box combines the inherent power management capabilities of Solar-Log™ control systems with a fail-safe backup unit, should the control system fail or ceases to be effective. This solution is a standardized, yet scalable framework to provide dynamic, closed-loop power management control over the inverter bank, suitable for up to 2 MWp size arrays and can be implemented globally.