Power Grid & Substation Time Synchronisation
Power grid is our core battlefield. We deliver SGCC "Four-Unification" Class-II clock-compliant master/slave clocks, IRIG-B/PTP multi-source distribution and monitoring systems for provincial-, prefectural- and county-level dispatch centres and 500kV/220kV substations and below.
Sector Overview
Power is Yinzhong's core battlefield. From 500kV / 220kV trunk substations to 110kV / 35kV distribution, to provincial / prefectural / county dispatch centres — Yinzhong master clocks, satellite-protection appliances, and monitoring devices are deployed across SGCC, CSG, the Big-Five generation groups, and provincial grid companies.
Core Pain Points
| Pain | Business impact | Yinzhong remedy |
|---|---|---|
| Slow master/slave failover | Mis-trip / fail-to-trip | YZ-9810 hot-redundant, < 50 ns |
| GNSS spoofing / jamming | Station-wide time corruption | YZ-9770 inline protection |
| Mixed IRIG-B / PTP / NTP | Devices out of sync | YZ-9810 simultaneous multi-protocol |
| Accuracy not provable ex-post | Liability disputes | YZ-9100 continuous monitoring |
Compliance
- DL/T 1100.1 Power system time sync — technical spec
- Q/GDW 11261 SGCC time sync device spec ("Four Unification")
- IEC 61850-9-3 Power utility PTP profile
- IEEE C37.238 Power-system precise time
- NEA Doc. 36 Power monitoring cyber-security regulations
Representative Projects
SGCC provincial 220kV substation timing retrofit
- Scale: 78 stations, 156 master/slave clocks, 78 protection appliances
- Challenge: hot-cutover, compatibility with legacy IEC 61850 gear
- Outcome: average accuracy < 200 ns, included in "Two Rules" KPI
CSG provincial dispatch monitoring
- Scale: 31 YZ-9100 units across provincial + 14 prefectural centres
- Challenge: heterogeneous legacy protocols
- Outcome: traceable alarm history; mean time to resolve 4 h → 35 min
Large hydro station timing + protection
- Scale: PMU + protection + DCS + SCADA unified time
- Challenge: outdoor environment, lightning exposure
- Outcome: 3 consecutive years zero timing incidents
Dispatch centres, substations and power plants each deploy their own time sources — cross-station time is neither traceable nor unified
WAMS, traveling-wave fault location and lightning location demand µs-level cross-station sync that one-way satellite timing cannot meet
Mismatched timestamps across secondary equipment, station communication gateways, PMUs and fault recorders make incident replay extremely difficult
Lightning strikes, water-ingressed feeders and GNSS denial scenarios expose the lack of redundancy and alarms in legacy timing networks
Hot-Standby Master/Slave
Master and slave clocks linked by dual time-stamp channels — slave time base remains continuously available under any single point of failure
Multi-Source Time Fusion
Supports BeiDou, GPS, IRIG-B(DC), PTP, enhanced Loran long-wave and BPL long-wave with automatic source preference
Satellite Common-View Timing
YZ-9880 enables traceable bidirectional sync between dispatch centres and substations
Time-Sync Monitoring
YZ-9100 monitors timing accuracy, protocol status and channel health across all timing-related devices, with tiered alarm forwarding
How LEADUS time-sync solutions land in substations, plants, hospitals and data centres
Three-Tier Dispatch Time Consistency
Provincial and prefectural dispatch centres run YZ-9000 master/slave clocks plus YZ-9880 common-view timing for traceable, sub-microsecond cross-centre synchronisation — backbone for dispatch automation, AGC/AVC and wide-area protection.
- Provincial dispatch master/slave: YZ-9846 (4U) + holdover
- Prefectural dispatch: YZ-9820 (2U), common-view linked to provincial
- County dispatch: YZ-9810 (1U), all three tiers time-consistent
Cross-centre sync accuracy ≤ 100 ns
Dispatch Centre500kV Substation "Four-Unification" Class-II Time Distribution
YZ-9846 (Four-Unification Class-II compliant) feeds every secondary device via IRIG-B(DC) / PTP / NTP — relay protection, PMUs, fault recorders, station gateways and the dispatch data network.
- Relay protection, PMU, fault recorders: IRIG-B(DC)
- Smart-substation SCD/MMS: PTP
- Station gateways, dispatch data network: NTP/SNTP
- Run / fault / sync / state monitoring all uplinked to O&M
Per-substation timing error ≤ 100 ns, Four-Unification Class-II compliant
SubstationJiuquan-Qilian UHV Converter Station Timing Security
Deployed satellite timing protection for the Gansu Jiuquan UHV Qilian converter station — adding YZ-9770 to detect and isolate GNSS spoofing, jamming and suppression, securing time-sync reliability for the UHV DC project.
- Master/slave clocks + rubidium atomic holdover
- YZ-9770 "timing firewall" identifies and isolates anomalies
- Anomalous events tier-classified and uplinked to O&M
Timing-security anomaly detection rate ≥ 99%
UHVSGCC Chongqing — YZ-9770 in Production
SGCC Chongqing installed and commissioned the YZ-9770 timing security system — among the first SGEPRI-certified timing security devices to enter grid production.
- YZ-9770 deployed between antenna/receiver and downstream timing devices
- Continuous monitoring of GNSS signal features and time offsets
- On anomaly, switches to local holdover and blocks contamination
First in China to pass SGEPRI certification
Timing SecurityProvince-Wide Time-Sync Network Monitoring
YZ-9100 monitors timing accuracy, protocol status and channel health across all timing-related devices (clocks, switches, routers, firewalls, servers, workstations) in the province — with tier-classified alarm forwarding to O&M and on-duty systems.
- Supports NTP / PTP / IRIG-B / DCF77 / PPS/PPM/PPH / serial accuracy capture
- Tiered alarms (info / major / critical) with automated dispatch
- Aligned to IEC 61850-90-3 time-sync monitoring, integrates with provincial O&M
Fault localisation time from hours to minutes
MonitoringSubstation Acceptance and Quarterly Maintenance
Construction crews and operations teams use the YZ-9910 handheld and YZ-9900 benchtop testers for new-site acceptance, periodic inspection, hidden-defect detection and warranty verification.
- Supports NTP / PTP / SNTP / IRIG-B / PPS / serial across protocols
- 7" touch + physical keys — no on-site training needed
- One-click test report export ready for archival
Per-site acceptance time cut by 50%, full traceability
Acceptance & MaintenanceSGCC Chongqing — YZ-9770 Timing Security
Installed and commissioned the YZ-9770 timing security system at SGCC Chongqing, identifying and isolating GNSS spoofing and jamming to build the grid's timing firewall.
Jiuquan-Qilian UHV Converter Station
Deployed the satellite-timing protection system for the Gansu Jiuquan UHV Qilian converter station, securing the time-sync reliability of the UHV DC project.
30+ Provincial Grids in Production
Equipment has been in continuous operation for 1+ years across 500kV/220kV substations in Beijing, Shanghai, the Xi'an DR centre, and dozens of provinces including Chongqing, Shanxi, Hunan, Hubei, Inner Mongolia, Hainan, Guangdong, Guangxi, Guizhou and Sichuan.
Find the right model
Our engineers combine your site topology, protocols and alarm logic to recommend the right model and customisation.