GWPC300-GP Generator Protection Panel

Product Overview

• The GWPC300-GP Generator Protection & Control Panel is mainly composed of the GWPR300-GD Generator Differential Protection Relay, GWPR300-GB Generator Backup Protection Relay, GWPR300-GRE Generator Rotor Earth Fault Protection Relay, GWPR300-GBCU Generator Control & Measurement Unit, printer, cabinet and supporting accessories. Integrating complete protection, measurement and communication functions, this panel supports fully unattended operation. It is widely applicable to medium and small-scale hydropower plants and thermal power plants, serving for automatic control and comprehensive protection of turbine generator units and steam turbine generator units.

Configuration & Composition

Main Functions

• GWPR300-GD Generator Differential Protection Relay: Instantaneous differential protection, proportional differential protection (with 2nd harmonic restraint and CT open-circuit blocking), CT open-circuit alarm, transverse differential protection (optional upon request), non-electrical protection (hydraulic fault, excitation fault, electrical fault), and communication functions.
• GWPR300-GB Generator Backup Protection Relay: Composite voltage restrained overcurrent protection, negative-sequence overcurrent protection, overload protection, zero-sequence overcurrent protection, overvoltage/undervoltage protection, overfrequency/underfrequency protection, reverse power protection, loss-of-excitation protection, stator earth fault protection, PT fuse failure alarm, CT open-circuit alarm, control circuit open-circuit detection, manual/automatic circuit breaker tripping & closing, and communication functions. 
• GWPR300-GRE Generator Rotor Earth Fault Protection Relay: Rotor single-point earth fault protection, rotor two-point earth fault protection, fault disturbance recording, and communication functions.
•  GWPR300-GBCU Generator Control & Measurement Unit: Completes high-precision measurement, logic control and full data acquisition for generator bays, and supports standard industrial communication functions.

Product Features

•  Cabinet Structure: The cabinet features dimensions of 2260×800×600mm. All protection and control devices are physically distributed at the bay level corresponding to the primary equipment. Each device is equipped with a dedicated power supply, independent CPU and operational circuit, enabling standalone implementation of protection, measurement and control functions for the corresponding bay. The hardware and software operate completely independently without relying on external communication networks.
• High Reliability Design: Adopts industry-leading DSP chips. Equipped with multiple reliable technologies including electrical isolation, hardware and software filtering, watchdog circuit protection, anti-interference coding, intelligent fault diagnosis, interlock logic control, as well as vibration-resistant and anti-interference structural design, which greatly enhances the overall operational stability and reliability of the equipment.
• Flexible Communication System: Each device can be directly connected to industrial microcomputers via fieldbus, or realize data interaction with microcomputer monitoring systems through communication management units. It supports substation integrated automation and distributed network configuration. All equipment operates independently and can achieve stable data communication with station-level devices.
• Comprehensive Protection Capability: This integrated panel provides full-coverage protection for generators and excitation transformers, effectively avoiding equipment burnout risks and laying a solid foundation for the long-term, safe and stable operation of power station units.
• Rich Interface Resources: Configured with multiple industrial communication ports and GPS time synchronization ports, all wired to standard terminal blocks. It supports data interconnection with power system backend platforms to realize four remote functions (remote measurement, remote control, remote signalling and remote adjustment), and accurately collects core operational parameters including active power, reactive power, current, voltage, frequency, power factor and electrical energy.