How does an intelligent multi-functional power monitoring and analysis device achieve "panoramic perception" of transient, dynamic, and steady-state power grid processes?
Publish Time: 2026-02-12
With the large-scale grid connection of new energy sources and increasingly complex load structures, modern power grid operation exhibits highly dynamic and uncertain characteristics. Traditional single-function monitoring equipment is no longer sufficient to comprehensively capture the entire picture of the power grid, from millisecond-level faults to long-term steady-state changes. The intelligent multi-functional power monitoring and analysis device has emerged to address this need—it integrates five core functions: intelligent fault recording, synchronous phasor measurement, high-precision power quality monitoring, accurate fault location, and real-time status perception. It is hailed as the power grid's "fault black box" and "dynamic electrocardiogram."
1. Multi-timescale collaborative sampling: Covering the entire spectrum of events from microseconds to hours
Power grid operation includes phenomena at different time scales: transient processes last from a few milliseconds to tens of milliseconds; dynamic processes last from hundreds of milliseconds to several seconds; and steady-state processes are measured in minutes or hours. This device addresses this challenge through a multi-rate synchronous sampling architecture: under normal conditions, it acquires phasor data at the standard PMU frequency; once a disturbance threshold is exceeded, it immediately triggers a high-speed waveform recording mode to fully capture transient waveform details; simultaneously, the power quality module continuously records steady-state indicators such as voltage deviation, flicker, and harmonics. The timestamps of these three data sources are strictly aligned, forming a seamless panoramic data stream.
2. High-Precision Synchronization and Wide-Area Collaboration: Constructing a Spatiotemporally Consistent Power Grid Mirror
"Panoramic perception" requires not only temporal continuity but also spatial consistency. The device incorporates a high-precision GPS/BeiDou timing module, ensuring all measurement data has microsecond-level time synchronization accuracy, conforming to PMU standards such as IEEE C37.118. This means that similar devices distributed across different substations can synchronously record the same disturbance event, providing a reliable basis for subsequent wide-area analysis. This spatiotemporally unified data foundation allows the dispatch center to reconstruct the entire power grid's chain response process during disturbances, much like watching a "slow-motion replay."
3. Intelligent Triggering and Deep Recording: From Passive Recording to Active Diagnosis
Unlike traditional waveform recorders that only activate after exceeding limits, this device employs a multi-level intelligent triggering mechanism. For example, when a voltage drop exceeding 10%, abnormal frequency changes, or a sudden increase in total harmonic distortion (THD) is detected, the system automatically activates the corresponding recording module and associates and stores the complete waveform, phasor, and event log for the preceding and following seconds. Furthermore, its built-in edge computing engine can perform preliminary analysis of the raw data, such as identifying fault types, estimating fault distance, and determining whether it was caused by grid disconnection from renewable energy sources, upgrading "data recording" to "intelligent diagnosis."
4. Integrated Platform Fusion: Eliminating Information Silos and Achieving Functional Collaboration
In the past, DFR, PMU, and power quality meters were often independent devices with inconsistent data formats and asynchronous timing, making correlation analysis difficult. This device, however, integrates these five functions into a single platform through hardware resource sharing and deep software fusion. The same set of sensor signals is fed in parallel into different analysis engines: the PMU module extracts the fundamental phasor, the power quality module decomposes harmonic components, and the fault recording module saves the original waveform. This "one-time acquisition, multi-dimensional analysis" architecture not only saves costs and space but also ensures that all analyses are based on completely consistent raw data, significantly improving diagnostic accuracy.
5. Adaptive Design for New Power Systems
Addressing the new challenges brought about by renewable energy grid integration, such as wide-frequency oscillations and subsynchronous resonances, the device has particularly enhanced its monitoring capabilities for high-frequency components. Its panoramic perception capability can effectively identify hidden risks such as inverter control instability and weak grid interaction mismatch, providing forward-looking support for the safe and stable operation of the power grid.
The intelligent multi-functional power monitoring and analysis device, through multi-scale sampling, high-precision synchronization, intelligent triggering, and deep functional integration, truly achieves full lifecycle perception of the power grid's "breathing," "heartbeat," and "spasms." It is not only a recorder but also an observer, providing indispensable "nerve endings" and "decision-making brains" for building a resilient, transparent, and intelligent new power system.
