Single-Line Diagram for 214.06 kWp Solar Photovoltaic Generation System

A comprehensive single-line electrical diagram for a 214.06 kWp solar photovoltaic generation system. The installation consists of 556 Canadian Solar CS3U-385MS modules arranged in multiple strings connected to two ABB PVS-100-TL inverters.

Key System Components:
– Grid interconnection at 13.2kV with utility demarcation point
– 1000kVA dry-type transformer
– Protection devices including 3x2500A, 3x1600A, and 3x800A circuit breakers
– Detailed inverter configuration with DC inputs from multiple PV arrays
– Complete ANSI protection functions (27, 59, 81O/U, 25, 78, 50/51, 67, 32)

Photovoltaic Array Configuration:

Multiple string arrangements with varying DC voltages (643.2V, 683.4V, 723.6V, and 763.8V) based on series-connected module quantities (16-19 modules per string). Each string incorporates appropriate DC protection including fuses, disconnects, and surge protection devices.

The diagram includes detailed internal schematics of the inverters showing MPPT inputs, DC/AC conversion, and protection functions. The system includes comprehensive metering and power quality protection at the point of utility interconnection.