CSD-812D-WF Wideband Oscillation Monitoring and Control Device
The CSD-812D-WF Wideband Oscillation Monitoring and Control Device (hereinafter referred to as CSD-812D-WF) is designed for power systems with a high penetration of renewable energy integration and power-electronic-based equipment. It is used to realize continuous monitoring of wideband oscillations in the power grid and to perform disturbance source identification and isolation after oscillations occur.
The CSD-812D-WF consists of one master unit and multiple slave units. The slave units are mainly responsible for wideband data acquisition on connected lines, oscillation feature extraction and eigenvalue calculation, and line-level control. The master unit is primarily responsible for executing oscillation control logic and issuing remote tripping (isolation) commands.
Wideband Monitoring
Monitoring of low-frequency oscillations in the 0.1–2.5 Hz range; sub-synchronous and super-synchronous oscillations in the 2.5–45 Hz and 55–95 Hz ranges; non-integer harmonic oscillations in the 100–2500 Hz range; and oscillation eigenvalues and oscillation frequencies at integer harmonic frequencies within the 100–2500 Hz range. Alarm judgment and signal reporting are provided.
Disturbance Source Tracing
Based on harmonic impedance disturbance source localization technology using propagation direction analysis, the disturbance source can be selectively isolated to achieve minimum or optimal control.
Refined (Granular) Prevention and Control
Wideband oscillation monitoring and control devices are deployed at wind farms and photovoltaic power plants to monitor reactive power compensation control loops, collector feeder branches, and outgoing lines of renewable energy plants. Priority is given to isolating reactive power compensation loops and collector feeder branches, with granularity down to individual generating units.
System-Level Prevention and Control
Wideband oscillation monitoring and control devices are deployed at collection substations and hub substations to monitor 220 kV renewable energy feeder lines at collection stations. Hierarchical and orderly tripping of 220 kV lines of renewable energy plants is implemented to identify and mitigate systemic oscillation risks.
High Anti-Interference Capability
The device exhibits strong immunity to interference. All components are industrial-grade products with stable hardware performance and can pass EMC Level IV tests.
Data Storage Capability
The device can be configured with optional storage modules and selectable memory capacity. It supports continuous recording of phasors, power, frequency, and other data for more than 14 days, and continuous recording of sampled-value disturbance waveform files for more than 3 days.
Communication Capability
The device provides comprehensive communication functions. It supports real-time communication with wideband measurement and processing units for integration into the WAMS system, and also supports IEC 61850 connectivity to the station control layer backend or connection to a wideband oscillation monitoring and control master station via protocol converters.
