State Grid Quzhou completes first low-voltage distributed PV direct control commissioning

State Grid Quzhou Power Supply Company successfully commissioned direct acquisition and control of a 0.4 kilovolt low-voltage distributed photovoltaic (PV) station in Huzhen township, Longyou county, on July 1, using the new-generation D6.0 dispatching subsystem.

Field staff confirmed that all monitoring and regulation functions were operating normally, marking the region's first deployment of this technology.

Previously, the dispatch center relied solely on the electricity information acquisition system for PV data statistics and online monitoring, which lacked active regulation capabilities.

This limited real-time monitoring and precise adjustment, failing to address grid pain points such as 10 kV line end‑to‑end management, reverse heavy overload in distribution transformer areas, and excessive voltage in transformer zones.

Using the D6.0 platform, the company integrated monitoring and control across the transmission network, distribution network and low-voltage distributed PV, creating a unified system that combines centralized monitoring with automatic regulation.

This breakthrough makes low‑voltage PV visible, manageable, and highly adjustable, providing a mature technical solution to mitigate safety risks from large‑scale distributed PV grid integration.

The direct control model builds a dedicated channel between the master station and PV equipment, allowing second‑level rapid response through power regulation and switching commands.

The project installed dedicated wireless acquisition terminals on the 0.4 kV inverter side, transmitting real‑time operational data to the prefecture‑level D6.0 master station via 4G/5G links.

Throughout the process, bidirectional identity authentication and encrypted data transmission ensured security, real‑time performance, and accuracy.

For applications such as peak shaving, power flow management, and local transformer overload mitigation, dispatchers can set target PV output levels, while the system automatically adjusts generation in real time. This improves the grid's ability to integrate renewable energy while maintaining stable operation.

Moving forward, State Grid Quzhou will continue advancing the D6.0 system, expand the application of this direct control technology, optimize monitoring precision and intelligent regulation efficiency, and expand new dispatch system coverage.

These efforts aim to accelerate the construction of a new‑type power system and promote green, low‑carbon energy transition.