Pumped Storage Power Station Integrated Automation System Solution

1. System Overview
          The pumped storage power station integrated automation system is an intelligent management system centered around a computer monitoring system, integrating multiple functions such as protection, measurement, control, and communication. Utilizing modern computer technology, network communication technology, and automatic control technology, the system enables automated monitoring and control of the entire station’s equipment, including generating units, transformers, switchyards, and auxiliary systems, ensuring safe, reliable, and economical operation.

Key Features of the System:
          Hierarchical and distributed architecture design
          High reliability and redundant configuration
          Support for standardized communication protocols
          Comprehensive anti-misoperation functions
          Intelligent diagnostics and early warning capabilities
          User-friendly human-machine interface (HMI)

2. System Composition and Subsystem Functions
2.1 Overall System Architecture

2.2 Detailed Subsystem Descriptions
2.2.1 Computer Monitoring System (CMS)
          Data Acquisition & Processing (SCADA) – Real-time collection and processing of operational parameters
          Operational Monitoring – Equipment status tracking, alarm management, trend analysis
          Control Operations – Unit start/stop, mode transition, load adjustment
          Event Logging – System events, operation records, fault recording
          Report Management – Automatic generation of operational & statistical reports
          Human-Machine Interface (HMI) – Graphical operation interface & historical data query

2.2.2 Protection Relay System
          Generator Protection – Differential protection, overcurrent protection, loss-of-field protection
          Transformer Protection – Differential protection, Buchholz relay, overload protection
          Line Protection – Distance protection, overcurrent protection, auto-reclosing
          Busbar Protection – Differential protection, breaker failure protection
          Station Service Protection – Overcurrent & earth fault protection

2.2.3 Local Control Unit (LCU)
          Unit LCU – Start/stop control, mode transition, protection interlocking
          Switchyard LCU – Circuit breaker & disconnector control, voltage/reactive power regulation
          Auxiliary LCU – Control of station service systems, drainage, compressed air
          Gate LCU – Intake/outlet gate control & monitoring

2.2.4 Governor System
          Speed & power regulation
          Frequency control
          Mode transition control
          Protection coordination

2.2.5 Excitation System
          Generator voltage regulation
          Reactive power control
          Field forcing & limitation functions
          De-excitation & overvoltage protection

3. System Hardware & Software Configuration
3.1 Hardware Configuration
3.1.1 Station Control Level Hardware

3.1.2 Local Level Hardware3.2 Software Configuration
3.2.1 System Software

3.2.2 Application Software

3.3 Key Equipment Technical Specifications
3.3.1 Computer Monitoring System
        MTBF (Mean Time Between Failures) ≥ 50,000 hours
        System Availability ≥ 99.9%
        Control Command Response Time < 1 sec
        Screen Refresh Time < 2 sec
        Dual-Network Redundancy & Hot Standby Support

3.3.2 PLC System
        Scan Cycle ≤ 10 ms
        IEC 61131-3 Programming Standard Compliance
        Hot-Swappable Module Support
        Operating Temperature Range -20°C to 60°C
        Industrial-Grade EMI Immunity (Level 4)

3.3.3 Protection Relays
        Protection Operation Time ≤ 30 ms
        Measurement Accuracy 0.2 class
        IEC 61850 Communication Protocol Support
        Fault Recording Capability
        Remote Setting Adjustment & Protection Enabling/Disabling

4. Key Technical Requirements
4.1 Reliability Requirements
        Redundant configuration for critical equipment
        Automatic fault detection & switching
        Electromagnetic interference (EMI) resistance
        Anti-misoperation interlocking

4.2 Real-Time Performance Requirements
        Status Change Transmission to Station Level ≤ 1 sec
        Analog Value Transmission (Deadband Exceeded) ≤ 2 sec
        Control Command Execution Cycle ≤ 1 sec
        Adjustable Screen Refresh Rate (1–3 sec)

4.3 Security Requirements
        Multi-level access control
        Multi-step command confirmation
        Operation logging & traceability
        Cybersecurity protection measures

4.4 Scalability Requirements
        Support for equipment capacity expansion
        Modular functional expansion capability
        Additional communication interface support
        Software upgrade compatibility