Compliant PSRAM compatible with Hisilicon Hi3931 for State Grid distribution area upgrade projects

Amid the intelligent upgrade of distribution transformers in smart grids, concentrators serve as core terminals for data acquisition and transmission, tasked with high-frequency multi-node sampling, automatic distribution network topology identification and rapid fault location.

Their performance directly governs grid operation efficiency and data precision, imposing stringent requirements on memory capacity and data processing capability of supporting HPLC chips.

Widely adopted for State Grid local communication modules in distribution upgrade projects, Hisilicon Hi3931 features reliable communication performance yet suffers from insufficient on-chip memory, a key bottleneck blocking compliant implementation and performance improvement of projects.

Our 64Mbit QSPI PSRAM delivers precise compatibility and superior performance as the optimal memory partner for Hi3931, resolving industry pain points and enabling compliant and smooth project rollout.

Latest mandatory specifications including State Grid Q/GDW 1374.2-2025 Technical Specification for Electricity Consumption Information Collection System stipulate HPLC routing modules must be equipped with large-capacity working RAM to support minute-interval data collection and topology identification.

A provincial State Grid utility launched a distribution intelligent upgrade program covering over 500 distribution stations, requiring concentrators to realize minute-level meter reading for more than 100 smart meters, automatic topology mapping and instant fault pinpointing in full compliance with State Grid rules.

The project selected Hisilicon Hi3931 as the core of local HPLC communication modules, yet the chip’s limited embedded SRAM failed to meet mandatory large buffer requirements, creating obvious constraints for topology data storage and computation.

After repeated comparison and evaluation, our 64Mbit QSPI PSRAM was specified as the supporting memory solution to satisfy regulatory and performance benchmarks.

Tailored to offset Hi3931’s memory shortage, our 64Mbit (8MB) PSRAM stands out for easy integration and stable performance.

The native 4MB internal SRAM of Hi3931 only suffices for basic communication protocol operation, unable to accommodate massive node datasets, route calculation algorithms and message buffering for topology mapping, which commonly causes lagging topology detection and data loss hindering project acceptance.

Built with QSPI interface, our PSRAM achieves pin-to-pin seamless connection with Hi3931 without PCB revision or driver modification, cutting integration cost and shortening project lead time.

Supporting up to 84MHz clock speed with access latency below 20ns, it provides ample buffer for hundreds of power data frames and full topology tables to guarantee steady algorithm execution and eliminate stalling or packet loss.

Field deployment has verified the merits of this Hi3931 matching memory solution.

Deployed across over 500 distribution stations in the province, the PSRAM fully meets project targets: stable topology identification free from memory-caused malfunctions and drastically improved sampling efficiency complying with State Grid’s one-minute collection criterion.

Manufactured to industrial-grade standards with an operating temperature range of -40℃ to +85℃, the component reliably withstands harsh field environments with zero memory-related failures and fully conforms to Q/GDW 1374.2-2025.

It has gained high recognition from the provincial State Grid and contractors, becoming a proven reference design for nationwide subsequent distribution upgrade projects based on Hi3931.

Please contact us for samples, datasheets, customized application solutions and technical support to jointly advance high-quality smart grid development:.

Hotline: +86 150-1290-5940.

Email: sales@manduic.com.

Website: www.manduic.com.