POWER PLANT AUTOMATION SOLUTIONS – ONE-STOP INTEGRATION

• The GWPC-EXC Generator Excitation Control Panel is an essential control component of excitation systems for synchronous generators with ratings up to 300 MW. It continuously measures generator-terminal voltage, stator current, frequency, reactive power, power factor, and other operating quantities, and regulates the DC output of the thyristor rectifier accordingly. The controlled excitation output maintains the generator-terminal voltage at the required level and enables the generating unit to meet its reactive power control requirements during grid-connected operation.
• The GWPC-EXC provides automatic voltage regulation, manual field current control, operating limiters, logic control, fault monitoring, HMI, and communication functions. Depending on the generator rating, excitation method, and project requirements, the power rectifier, field-flashing unit, de-excitation unit, and excitation transformer may be supplied as integrated assemblies or as separate panels and equipment.
• The panel is widely used in hydropower plants, thermal power plants, industrial captive power plants, biomass power plants, waste-heat power generation facilities, and other facilities that operate synchronous generators. It plays an important role in ensuring the safe, stable, and efficient operation of the generator.

• The GWPC400-CMC Station Common Measurement and Control Panel is designed for station-wide common signal acquisition, busbar voltage supervision, equipment status monitoring and remote control in substations, power plants and renewable energy facilities.
• Built around the GWPR400-CMC Common Measurement and Control Unit, the panel serves as an interface between primary equipment, station auxiliary systems and the substation automation system or SCADA platform. It collects analogue measurements, binary status signals and alarm indications while providing supervised control and remote regulation functions for designated station equipment.
• The GWPC400-CMC is suitable for both conventional and digital substation applications. It can be configured for projects at voltage levels such as 132 kV, 66 kV and 33 kV, as well as other voltage levels subject to project requirements.

• The GWSC-HS is a new-generation distributed intelligent monitoring platform suitable for conventional hydropower stations, ecological hydropower stations, diversion hydropower stations, and pumped-storage power stations. Fully compliant with international power industry standards and deeply integrated with professional hydropower automation control technologies, the system realizes integrated monitoring and automatic control of turbine governing, excitation regulation, synchronizing, relay protection, AC/DC power supply, gate control system, plant-wide oil-water-gas auxiliary systems, and switchgear bay-level measurement and control functions. It supports unattended or reduced-staff operation modes for hydropower stations.
• Adopting an open modular architecture, the entire set of automation equipment forms a unified and standardized brand system, including station-level equipment, GWPC series control panels, GWPC300 series protection panels, GWPS AC/DC power supply systems, as well as distributed protection relays and intelligent meters for switchgears. All equipment features high compatibility and interoperability. With complete sequence control logic, intelligent regulation algorithms, fault early warning mechanisms and standardized dispatching interaction capability, the system effectively improves hydropower station operational safety and power generation efficiency, reduces on-site operation and maintenance costs, and supports the digital and intelligent upgrading of hydropower plants.

• Turbine and Generator Equipment;Hydraulic turbine-generator sets, reversible pump-turbine units for pumped-storage plants (generating and condensing modes), small steam turbine-generators and tidal turbine-generators. Unit capacities range from several hundred kW small units up to large hydro-generators with a capacity of millions of kilowatts.
• Signal Acquisition Targets;Generator electrical quantities collected via Current Transformer (CT) and Potential Transformer (PT), unit PT100 temperature signals, pressure, flow rate, rotating speed, liquid level, protection trip contacts, position switches and 4–20mA analog transducer signals.
• System Compatibility;Compatible with plant-level host computers, Remote Terminal Unit (RTU), dispatching systems, protection devices, fault recorders and electrical energy metering equipment. It supports mainstream power communication protocols including IEC 61850, Modbus TCP/RTU, serial communication and fiber-optic communication.

The GWPC-RTU RTU Communication Panel is primarily used in photovoltaic power plants, substations, distribution systems, power generation facilities, and other power automation applications for communication protocol conversion and data transmission between intelligent electronic devices (IEDs) and supervisory control systems.

Main Functions
Protocol Conversion;Supports protocol conversion and interoperability among various communication protocols, including:

• Modbus/IEC 60870-5-103/IEC 60870-5-104/TCP-IP/DNP3/IEC 61850

Data Transmission and Monitoring

• Data Upload: Telemetry, status indications, alarms, and event information are transmitted in real time to centralized control centers, SCADA systems, or utility dispatching centers through fiber-optic networks, dedicated communication networks, or wireless communication channels.
• Remote Monitoring and Control:Supports remote monitoring, supervisory control, and operational management of plant and substation equipment from dispatching centers, ensuring the safe and reliable operation of the power system.