Update README.md

Author: letranduytan

README.md

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 # SCADA System for Solar Power Generationusing Raspberry Pi 3
+
+## 📌 Introduction
+The **SCADA Solar Rooftop System** project aims to build a **smart monitoring and control system** for rooftop solar power using SCADA technology.  
+It integrates hardware (PV, Inverter, Battery, Data Logger, Raspberry Pi) and software (SCADA/HMI, Cloud) to **monitor, control, and optimize solar energy operations**.
+
+✨ **Key Benefits**:
+- Reduce electricity costs.
+- Utilize clean & renewable energy.
+- Real-time monitoring and predictive maintenance.
+- Increase energy independence for households and businesses.
+
+---
+
+## 🏗️ System Architecture
+
+The system is divided into 3 SCADA levels:
+
+1. **Field Level**  
+   - PV Array (solar panels)  
+   - Combiner Box, Fuse, AC Breaker  
+   - Battery Bank (energy storage)  
+   - Weather Station (measures irradiance, temperature, wind, humidity)  
+   - Inverter (DC → AC conversion)  
+   - Charge Controller  
+
+2. **Control Level**  
+   - Inverter (PWM, MPPT control, voltage/current monitoring, SCADA communication)  
+   - Charge Controller (controls charging process)  
+   - Data Logger (can trigger safety cut-offs)  
+
+3. **Supervisory Level**  
+   - Plant SCADA (Server + HMI)  
+   - Raspberry Pi & Data Logger (data acquisition and transmission)  
+   - Dashboard (real-time monitoring, alarms, performance analysis)  
+
+---
+
+## ⚡ Workflow
+
+1. **Solar Energy Conversion**  
+   PV array → generates DC power.  
+
+2. **DC → AC Conversion**  
+   Sunny Boy inverters convert DC → AC 220/380V, synchronized with the grid.  
+
+3. **Grid Connection & Power Supply**  
+   AC power is supplied to local loads, excess power → exported to the grid.  
+
+4. **Measurement & Data Collection**  
+   - SDM630, SDM120: measures power, voltage, current.  
+   - PVmet75: irradiance, temperature, wind speed.  
+   - Data transmitted via RS485 → Modbus TCP.  
+
+5. **Data Management & Monitoring**  
+   - SMA Data Manager M + Router + Switch aggregate data.  
+   - SCADA (Raspberry Pi & Laptop) display and alert.  
+
+6. **Analysis & Optimization**  
+   - Dashboard shows power vs irradiance.  
+   - Detects inverter/panel faults and abnormal conditions.  
+
+---
+
+## 🔧 Main Components
+
+- **PV Array**: solar panels.  
+- **Combiner Box**: fuses and surge protection.  
+- **Charge Controller**: manages charging process (PWM/MPPT).  
+- **Battery Bank**: stores surplus energy.  
+- **Inverters (x4)**: DC → AC conversion, grid synchronization.  
+- **Data Logger (Raspberry Pi 3)**: data acquisition and transmission.  
+- **Weather Station**: collects environmental data.  
+- **HMI/SCADA**: user interface (PC, Web, Mobile).  
+
+---
+
+## 📊 Monitored Parameters
+
+- Generated power (kW)  
+- Voltage & Current (DC/AC)  
+- System efficiency (Performance Ratio – PR)  
+- Battery status (SOC, SOH, temperature)  
+- Environmental data (irradiance, temperature, wind)  
+
+---
+
+## 📜 EVN Regulations (Vietnam – Power Plan VIII)
+
+- Rooftop solar is considered **distributed energy** to reduce grid load.  
+- Systems **<100 kW**: notification to EVN only.  
+- Systems **≥100 kW**: must register as power generation source.  
+- Excess electricity sales require **Power Purchase Agreement (PPA)** with EVN.  
+- Governed by **Decree 18/2025 & 58/2025**.  
+
+---
+
+## 🚀 Installation & Deployment
+
+1. **Setup Raspberry Pi 3**  
+   - Install Raspberry Pi OS  
+   - Install `Node-RED`, `Grafana`, `InfluxDB`  
+   - Connect via Modbus RTU/TCP to inverters & sensors  
+
+2. **Deploy SCADA/HMI**  
+   - Web or mobile dashboards  
+   - Alarm & notifications via email/SMS  
+
+3. **Cloud Integration** *(optional)*  
+   - MQTT Broker or Cloud Monitoring  
+
+---
+
+
+## 📌 License
+This project is for **educational and research purposes only**.  
+Commercial use is not allowed without permission from the development team.