CSD-811G-WF Wideband Oscillation Damping Control System
The Wideband Oscillation Damping Control System is applicable to power systems with a high share of renewable energy integration and a high penetration of power-electronic-based equipment. It is designed to achieve continuous monitoring of wideband oscillations in the power grid and to provide oscillation suppression once oscillations occur.
The Wideband Oscillation Damping Control System is connected in parallel at the renewable energy plant side. Through supplementary damping control, it provides increased positive damping at targeted oscillation frequencies, thereby enhancing oscillation suppression capability. The system consists of two main components: a Wideband Oscillation Damping Controller and a power electronic converter.
The Wideband Oscillation Damping Controller extracts oscillation characteristic signals in real time and dynamically generates compensating current reference values. Based on the control commands, the power electronic converter injects control currents at specified frequencies into the 35 kV busbar.
1) 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 supported.
2) Wideband Oscillation Suppression
For high-risk renewable energy plants, a wideband oscillation damping and suppression system is deployed. By applying a frequency-domain aggregated impedance modeling approach, the impedance at the point of interconnection (POI) of the target wind farm is reshaped, thereby fundamentally mitigating system-wide wideband oscillation issues.
3)? High Anti-Interference Capability
The device exhibits strong immunity to interference. All components are industrial-grade with stable hardware performance and are capable of passing EMC Level IV tests.
4) Data Storage Capability
The device supports configurable storage with selectable memory capacity. It can continuously record phasors, power, frequency, and other data for more than 14 days, and continuously record sampled-value disturbance waveform files for more than 3 days.
5) 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.
