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PV Plant Performance Ratio (PR) and Global Horizontal Irradiance (GHI) Analysis

Overview

This project processes and visualizes the daily Performance Ratio (PR) and Global Horizontal Irradiance (GHI) data of a photovoltaic (PV) plant. The goal is to analyze the plant's performance over time, comparing it against a dynamically calculated budget line and visualizing key trends.

Dataset

The raw data consists of two parameters:

  • PR (Performance Ratio): Tracks daily PV plant performance; higher values indicate better performance.
  • GHI (Global Horizontal Irradiance): Tracks daily solar irradiation; higher values indicate sunnier days.

The data is organized by year-month and parameter in separate folders.

Data Processing

  • The script reads all CSV files from the PR and GHI directories.
  • It merges the data into a single CSV file named single_csv.csv with columns: Date, GHI, and PR.
  • The processed data contains 982 rows (daily records).

Visualization

  • The visualization script generates a scatter plot where:
    • The x-axis is the date.
    • The scatter points show daily PR values.
    • Points are color-coded based on GHI ranges:
      • < 2: Navy blue
      • 2 - 4: Light blue
      • 4 - 6: Orange
      • > 6: Brown
    • A red line shows the 30-day moving average of PR.
    • A dark green budget line shows a decreasing target PR value annually (not hardcoded).
    • The plot also highlights points above the budget and shows average PR values for various recent periods.