IOT News

With the widespread deployment of photovoltaic (PV) power plants, grid interconnection issues have drawn increasing attention. To ensure safe, stable, and efficient grid-connected operation of PV systems, real-time monitoring and data analysis of power quality at the point of common coupling (PCC) are essential. This allows operators to stay informed about equipment performance and prevent issues such as reverse power flow or grid overload. To address these needs, WideIOT has developed an online power quality monitoring system for PV grid-connected applications, built around its industrial data acquisition gateway. The solution integrates data collection, edge computing, protocol conversion, remote monitoring, and visual management into a single, unified deployment.

The system deploys industrial data acquisition gateways at the power quality monitor or inverter side to collect key parameters—including voltage, current, frequency, harmonics, power factor, and active/reactive power. Through edge computing, the data is standardized and transmitted via 5G/4G wireless networks to the PV plant operation management platform. This enables remote monitoring, fault alerts, command dispatch, equipment management, and visual data analytics, providing robust data support for the safe and reliable operation of PV power stations.

Key Features

Supports access to a wide range of communication protocols, including IEC 101/103/104, Modbus TCP/RTU, IEC 61850, and DL/T645, ensuring compatibility with various power quality monitoring devices and inverters.

Built-in protocol conversion engine allows collected data to be transformed into standard protocols such as Modbus, MQTT, and HTTP, facilitating seamless integration with management platforms or third-party systems.

Edge computing capabilities include data filtering, threshold-based alarming, logical judgment, scheduled reporting, data caching, and retransmission, significantly improving system responsiveness.
Industrial-grade hardware design with 9–36 V wide-voltage input, operating temperature range of –20°C to 70°C, support for battery/solar power, and strong electromagnetic interference resistance, making it well-suited for outdoor PV site environments.

System Benefits

Enables real-time monitoring and visual display of power quality at PV grid connection points, helping O&M personnel stay fully aware of system status at all times.

Through threshold alerts and trend analysis, potential issues such as harmonic overruns and voltage fluctuations can be detected early, preventing equipment damage and grid disconnection incidents.

Establishes a unified local and remote monitoring platform, reducing the frequency of on-site inspections, lowering O&M costs, and improving management efficiency.

Complete historical data storage provides a reliable basis for power quality assessment, equipment selection optimization, and grid dispatch planning.

Supports centralized management of multiple sites, facilitating integrated monitoring and O&M scheduling for PV station clusters, and contributing to the digital transformation of new energy infrastructure.