End User:

Sindh Energy Client, Karachi

Project Scope:

The scope of this project encompasses the supply, installation, testing, and commissioning of a comprehensive String Monitoring Unit (SMU), Supervisory Control and Data Acquisition (SCADA) system, and a weather monitoring station with sensors. These components are designed to monitor and control a 200kW grid-tie solar power plant integrated within a 110kV substation in Karachi.

Background:

The Sindh Energy Client is embarking on an eco-friendly initiative by developing a 200kW solar power plant in Karachi. This project aligns with their broader mission to enhance renewable energy usage and reduce carbon emissions. The primary goal is to implement a state-of-the-art monitoring and control system that ensures optimal performance and reliability of the solar power plant.

Requirements:

The Sindh Energy Client required a robust solution that includes:

• String Monitoring Unit (SMU)
• Supervisory Control and Data Acquisition (SCADA) system
• Weather Monitoring Station equipped with various environmental sensors

System Description:

FAIZAL was tasked with providing an integrated solution that covers the following components and functionalities:

1. String Monitoring Unit (SMU):
   • The SMU is essential for monitoring the performance of individual strings within the solar array.
   • It provides detailed data on voltage, current, and power output, helping in the early detection of underperforming strings.
2. SCADA System:
   • The SCADA system enables operators to view both historical and real-time data.
   • It offers remote monitoring and control capabilities via the internet.
   • Utilizes Modbus RTU protocol for communication with SMUs, weather monitoring stations, and inverters.
3. Weather Monitoring Station:
   • A typical station includes sensors such as pyranometers, wind speed sensors, ambient temperature sensors, and module temperature sensors.
   • These sensors provide analog values in the 4-20 mA range.
   • A converter integrates these analog signals into RS485 communication, interfacing with the PLC and SCADA systems.
4. PLC Integration:
   • A Programmable Logic Controller (PLC) is used to regulate and control various operations.
   • The PLC is hardwired to a breaker, ensuring real-time status updates and immediate control actions.

Operational Details:

1. Data Monitoring and Control:
   • The SCADA system collects data from SMUs, inverters, and the weather monitoring station.
   • Operators can analyze data trends, generate cumulative graphs, and produce detailed reports.
   • The system supports three web-based clients, ensuring accessible and efficient management.
2. Environmental Sensor Integration:
   • Pyranometers measure solar irradiance.
   • Wind speed sensors, ambient temperature sensors, and module temperature sensors provide critical environmental data.
   • These sensors are crucial for assessing and optimizing the performance of the solar power plant.
3. Communication Protocols:
   • Modbus RTU protocol ensures reliable communication between various system components.
   • The RS485 network facilitates efficient data transmission to the central SCADA system.

Features of the Centralized Management Platform:

• Real-Time Monitoring:
  • Dashboards and reports provide comprehensive overviews of system status and performance metrics.
• Data Analysis:
  • Historical and real-time data analysis helps in identifying trends and optimizing operations.
• Remote Access:
  • The platform can be accessed via smartphones, tablets, or laptops, ensuring flexibility and convenience for operators.
• Alert System:
  • Configurable SMS alerts notify operators of critical events, enabling prompt response and maintenance actions.

Project Outcomes

The implementation of this centralized monitoring and control system has significantly enhanced the operational efficiency of the solar power plant. Automated data acquisition and real-time monitoring have reduced the need for manual interventions, while the predictive maintenance capabilities have minimized unscheduled downtimes. This project not only aligns with the Sindh Energy Client’s sustainability goals but also sets a benchmark for future renewable energy projects in the region.

By partnering with FAIZAL, the Sindh Energy Client has successfully transitioned to a modern, automated solution that ensures the reliable and efficient operation of their solar power infrastructure.