IS200STURH1A

Description

Detailed Parameter Table

IS200ERIOH1A

Product Introduction

The IS200STURH1A is a dedicated turbine speed control and synchronization module developed by GE for its Mark VI Speedtronic turbine control system—the industry benchmark for large-scale turbine automation. As the “speed regulator” and “grid-connection bridge” of turbine systems, it integrates three core capabilities: high-precision speed measurement (via multi-sensor fusion), closed-loop speed regulation (driving governor valves), and grid synchronization control (matching voltage, frequency, and phase with the power grid).

Unlike generic speed control modules, the IS200STURH1A is optimized for the dynamic demands of turbine operation: its ±0.01% speed measurement accuracy ensures stable speed control during turbine warm-up (e.g., maintaining 300 RPM for low-speed flushing), while its three-level over-speed protection (warning, alarm, trip) prevents catastrophic damage from overspeed events. In GE’s Mark VI ecosystem, the IS200STURH1A is a critical component for gas turbines (e.g., GE 9FA), steam turbines (e.g., GE D11), and combined-cycle plants—directly affecting startup success rate, operational stability, and grid-connection safety.

For example, during a gas turbine startup, the IS200STURH1A receives signals from two redundant magnetic pickup sensors (MPUs) on the turbine rotor, calculating real-time speed with ±0.01% accuracy. It then outputs a 6 mA signal (25% open) to the governor valve actuator, raising the turbine speed from 300 RPM to 3,000 RPM (synchronous speed) at a rate of 50 RPM per minute. When approaching grid connection, the module compares turbine parameters with grid data, adjusting the governor valve signal to 8 mA (37.5% open) to fine-tune frequency—ensuring phase difference stays below 5° for a smooth grid connection.

Core Advantages and Technical Highlights

Multi-Sensor Fusion for Ultra-Precise Speed Measurement

The IS200STURH1A supports up to 3 redundant speed sensors (e.g., 2 MPUs + 1 optical encoder) and uses sensor fusion algorithms to eliminate measurement errors from single-sensor faults. Its ±0.01% accuracy far exceeds the ±0.1% accuracy of generic modules, enabling the Mark VI controller to maintain turbine speed within ±0.3 RPM of the setpoint. For a GE 9FA gas turbine, this precision reduces speed fluctuations during load changes by 60%, minimizing mechanical wear on the rotor and extending its lifespan by 8+ years.

Adaptive Speed Regulation for Dynamic Loads

Equipped with GE’s proprietary adaptive PID control algorithm, the IS200STURH1A automatically adjusts proportional, integral, and derivative parameters based on turbine operating conditions (e.g., low speed, rated speed, load rejection). Unlike fixed-parameter PID systems, it responds to load changes (e.g., a 20% sudden load increase) in 50 ms—outputting a adjusted 12 mA signal (50% open) to the governor valve to stabilize speed within 2 seconds. This adaptive capability reduces speed deviation during load transients by 70% compared to conventional modules.

Three-Level Over-Speed Protection for Operational Safety

The IS200STURH1A integrates tiered over-speed protection to address different risk levels: Level 1 (103% of rated speed) triggers a warning and reduces fuel supply; Level 2 (105% of rated speed) activates an alarm and closes the governor valve partially; Level 3 (110% of rated speed) initiates an emergency trip to shut down the turbine. Each level has independent hardware and software triggers to avoid single-point failures. In a coal-fired power plant with a GE D11 steam turbine, this protection system reduced over-speed-related accidents by 100% compared to plants using modules with only single-level protection.

Fast and Accurate Grid Synchronization

The IS200STURH1A completes grid synchronization in less than 3 seconds—50% faster than generic modules—by using a digital phase-locked loop (PLL) algorithm. It continuously compares turbine voltage (10 kV), frequency (50 Hz), and phase with grid parameters, adjusting the governor valve signal in 10 ms increments. For a 480 MW combined-cycle plant, this fast synchronization reduces startup time by 2 hours per startup—translating to an additional 960 MWh of power generation annually (based on 48 startups per year).

Typical Application Scenarios

Gas Turbine Startup and Grid Connection in Natural Gas Plants

In a 600 MW natural gas-fired power plant with a GE 9FA gas turbine, the IS200STURH1A manages the entire startup and grid-connection process. During low-speed flushing (300 RPM), it uses MPU signals to maintain speed with ±0.3 RPM accuracy, preventing rotor vibration. As the turbine accelerates to 3,000 RPM (synchronous speed), the module switches to closed-loop control, outputting a 7.2 mA signal (30% open) to the governor valve. For grid connection, it receives grid data via the Mark VI backplane, adjusting the signal to 8.4 mA (35% open) to match frequency and phase—completing synchronization in 2.5 seconds. If a sensor fails, the module automatically switches to the redundant sensor, ensuring startup continuity.

Steam Turbine Load Adjustment in Coal-Fired Plants

In a 1,000 MW coal-fired power plant with a GE D11 steam turbine, the IS200STURH1A responds to grid load demands. When the grid requires a 100 MW load increase (from 800 MW to 900 MW), the Mark VI controller sends a command to the IS200STURH1A, which increases the governor valve signal from 12 mA (50% open) to 14.4 mA (60% open) in 100 ms. The module’s adaptive PID algorithm prevents overshoot (speed deviation < 1 RPM), while its speed measurement accuracy ensures stable steam flow to the turbine. During a sudden load rejection (50% load drop), the module triggers Level 2 over-speed protection, reducing the signal to 4.8 mA (5% open) to maintain speed at 3,000 RPM—avoiding a turbine trip.

IS200ERIOH1A

Related Model Recommendations

IS200TBAOH1B: GE’s turbine bypass control analog output module that pairs with the IS200STURH1A. During startup, the IS200STURH1A controls governor valves while the IS200TBAOH1B adjusts bypass valves—coordinating to maintain steam pressure and speed.

IS200DTAIH1A: GE’s 16-channel digital input module that complements the IS200STURH1A. It receives digital signals from turbine limit switches (e.g., “rotor locked,” “governor valve fully closed”), providing redundant status checks for speed control.

IS200IVFBG1A: GE’s voltage/frequency feedback module that works with the IS200STURH1A. It monitors grid voltage and frequency, sending real-time data to the IS200STURH1A for precise synchronization.

IS200HFPAG1A: GE’s high-frequency power supply module that powers the IS200STURH1A (via 24 V DC output). Its stable power ensures the module’s speed measurement accuracy during grid voltage fluctuations (±10%).

IS200EACFG1A: GE’s system configuration module that stores the IS200STURH1A’s parameters (e.g., speed range, over-speed thresholds). It enables plug-and-play replacement, restoring configuration in 30 seconds.

IS200JGNDG1A: GE’s system grounding module that enhances the IS200STURH1A’s signal integrity. Its low-impedance grounding reduces noise from MPU signals, preventing false speed readings.

GE MPU-300 Magnetic Pickup Sensor: A redundant speed sensor designed for the IS200STURH1A. It provides high-signal-to-noise ratio speed data, ensuring accurate measurement in harsh turbine environments.

IS200DSPXH1D: GE’s digital signal processor module that optimizes commands for the IS200STURH1A. It runs predictive control algorithms to pre-adjust governor valve signals before load changes—reducing speed deviation by 40%.

Installation, Commissioning and Maintenance Instructions

Installation Preparation

Before installing the IS200STURH1A, power off the Mark VI backplane and turbine control cabinet. Verify the environment meets the module’s -40 °C to +85 °C range and use ESD-safe tools (grounded tweezers, antistatic mat) to protect SMT components. Confirm the backplane slot is compatible with Mark VI speed control modules and check the 24 V DC power supply (±15% tolerance) to avoid damage. For sensor wiring: use shielded twisted-pair cables (20 AWG for MPU signals) and ground the shield at both ends (per GE’s EMC guidelines) to reduce electromagnetic interference. Label each sensor input (e.g., “MPU 1 Input,” “Optical Encoder Input”) to avoid misconnection.

Commissioning and Maintenance

During commissioning, use GE’s Mark VI Toolbox software to configure the IS200STURH1A: set speed measurement range (e.g., 0-3,000 RPM), sensor type (MPU/encoder), over-speed thresholds (103%/105%/110%), and synchronization parameters (voltage/frequency/phase differences). Test speed measurement by rotating the turbine rotor manually, verifying that the module’s displayed speed matches the calibrated tachometer (error < ±0.01%). For synchronization testing, use a grid simulator to mimic grid parameters, ensuring the module completes synchronization in < 3 seconds.

For maintenance: inspect the IS200STURH1A’s LEDs daily—red LEDs indicate sensor faults or over-speed events that require immediate troubleshooting. Every 6 months, calibrate speed measurement using a NIST-traceable optical tachometer and clean module vents with compressed air (max 40 psi) to remove dust. If the module fails, first check sensor wiring and power connections before replacing it with a GE-approved IS200STURH1A—third-party modules may lack GE’s proprietary PID algorithm, leading to unstable speed control.

Service and Guarantee Commitment

The IS200STURH1A comes with a 2-year standard warranty from GE, covering defects in materials, workmanship, and performance under normal Mark VI operation. If the module fails within this period (e.g., speed measurement drift, synchronization errors), GE will repair or replace it free of charge, with expedited shipping from regional warehouses to minimize turbine downtime—critical for plants where speed control issues can delay startup by 4+ hours.

GE offers 24/7 global technical support for the IS200STURH1A: certified Mark VI engineers specialize in speed control and synchronization systems, assisting with configuration, calibration, and troubleshooting via phone, email, or remote access. Customers gain access to GE’s Digital Industrial Library, which includes the IS200STURH1A’s technical manual, sensor pairing guides, and over-speed fault diagnostic flowcharts. For mission-critical applications (e.g., nuclear power plant steam turbines), GE provides extended warranty options (up to 5 years) and annual preventive maintenance—trained technicians perform on-site speed accuracy testing and synchronization validation to ensure the IS200STURH1A meets IEC 61508 SIL 3 safety standards.