In modern thermal power plants and industrial power systems, steam turbines are core power equipment, and their operating reliability is directly related to the safety and economy of the entire system. As a key component of the steam turbine control system, the valve control module E1612 bears the important responsibility of regulating steam flow and maintaining stable operation of the unit.

I. Intelligent architecture innovation of E1612 module

The E1612 module adopts a dual DSP collaborative architecture. The main processor is responsible for real-time control algorithm execution, and the sub-processor is dedicated to state monitoring and fault diagnosis. This physical isolation design concept not only ensures the continuity of the control function, but also provides independent computing resources for fault detection. The module integrates 16 high-precision AD sampling channels with a sampling accuracy of 0.05% FS, which can capture the changing trends of key parameters such as valve position, oil pressure, and temperature in real time.

At the software level, the control module E1612 introduces an abnormality recognition algorithm based on fuzzy logic. The algorithm compares the real-time collected displacement curve with the standard curve for similarity by establishing a valve dynamic characteristic model.

When the deviation value exceeds the preset threshold, the system automatically triggers a three-level diagnostic process: the first level performs signal validity verification to eliminate misjudgment caused by sensor failure; the second level performs time domain and frequency domain joint analysis to identify typical faults such as mechanical jamming or hydraulic leakage; the third level starts historical data tracing to evaluate the evolution trend of the fault.

II. In-depth analysis of fault self-diagnosis function

The diagnostic system of control module E1612 adopts a dual verification strategy of “horizontal comparison + vertical tracking”. At the horizontal level, multiple control module data of the same valve group are cross-checked in real time to eliminate single-point measurement errors; at the vertical level, a historical database containing 5,000 operating points is established to identify abnormal features through pattern matching technology. The system classifies faults and processes them in different levels:

Class A (emergency fault): including valve stem fracture, servo jamming and other faults that directly endanger equipment safety, triggering millisecond-level emergency response

Class B (performance degradation): progressive faults such as seal wear and spring stiffness reduction, start predictive maintenance procedures

Class C (environmental interference): adaptive compensation is performed for external factors such as temperature changes and electromagnetic interference

III. Collaborative linkage between self-diagnosis and alarm systems

When the self-diagnosis system detects an abnormality, the internal DSP of the control module E1612 performs preliminary fault location, generates a structured data packet containing fault code, severity level, and impact range, and then uploads it to the DCS system for joint analysis with unit vibration, temperature and other parameters. The diagnostic system identifies the abnormal feedback signal of the positioner, automatically switches to the backup sensor channel, and simultaneously triggers the “valve control abnormality” secondary alarm to guide the operation and maintenance personnel to replace the fault locator to avoid unplanned downtime.

When looking for high-quality, reliable valve control module, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

Yoyik offers various types of spare parts for steam turbines, generators, boilers in power plants:
Speed Sensor ZS-04-075-5000
Transmitter 2051CD2A02A1AS5E1M5Q4
LVDT sensor 5000td-xc3
Preamplifier 330106-05-30-10-02-00
LVDTsensor 10000TDGNK
MINI D1 PRO DEVELOPMENT BOARD ESP8266 16M
RELAY PROTEKSI IN ST571H-400-VM
lvdt displacement 8000TD
Pull Switch HKLS-ll
Intelligent Inverse Speed Transmitter and Protection Device HY-5SF
TEMPERATURE CONTROLLER BWR-04JJ(TH)
AC Active power (Watt) transducer S3-WD-3-015A40N
Proximity Transducer for Differential expansion of turbine ES-25
MAGNETIC SENSOR BRAND EPRO EMERSON PR6422/012-050
PRESSURE GAUGE RANGE: 0~1.6MPA, YTN-100
hall effect displacement sensor 4000TDG
potentiometer is a transducer DET250A
Actuator Displacement Sensor HL-6-150-15
linear sensors position TDZ-1-150
Temperature Gauge WSS-481W
Schneider Electric Breaker EZD100E4100N
RTD WZP2-2328
Armor Sensor EZ1081-07-00-010 & EZ1901-090
Auxiliary switch for circuit breaker DF3I04857S
oil tank level gauge UHZ-10C00N4000 S1.00DN25PN1.6V
Limit Switch For 3 Screws On Double Stack MH302-11YW
Embedded touch screen HSDS-30/C
Vibration sensor ZS-04
Sensor Position LVDT LP bypass HTD-400-3
Tachometer SZC-04B
FUSE 450SBMT