Manufacturer of Turbine Components
Manufactures various types of steam turbines ranging from 5MW - 50MW,including condensing, backpressure, and extraction-condensing designs
DEH-NTK Digital Electro-Hydraulic Control System
The DEH-NTK Steam Turbine Control System incorporates the strengths of numerous similar systems both domestically and internationally.
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DEH-NTK Digital Electro-Hydraulic Control System
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Product Introduction
The DEH-NTK Steam Turbine Control System incorporates the strengths of numerous similar systems both domestically and internationally. Built upon a high-speed network and a powerful DPU, the system employs international standards or mainstream industrial products for both software and hardware, forming an open industrial control system. It fully embodies the characteristics of “reliability,” “ease of use,” and “advanced technology.”
Applicable Unit Types:
Customer needs drive Keyuan's innovation. Building on years of engineering experience, Keyuan has standardized designs and development for various turbine types, creating DEH systems tailored to different configurations for user selection.
● Condensing Turbines
● Back-pressure Turbines
● Single-extraction Turbines
● Double extraction turbines
● Extraction-backpressure turbines
● Air-cooled turbines
● Steam-injection turbines
● Gas-steam combined cycle turbines
Technical Parameters:
● Speed control range: Handwheel speed to 3500 rpm, accuracy (±1 rpm)
● Load control range: 0–115%, accuracy 0.5%
● Speed deviation rate: 3–6% continuously adjustable
● Speed rise rate control accuracy: (1 rpm)
● Speed overshoot at rated load: (7% of rated speed)
● Control system hysteresis rate ≤0.2%
● Steam extraction pressure deviation: 0–10%
● Analog control loop cycle time: 50 ms (including I/O module-CPU communication time)
● Digital control loop cycle time: 20 ms (including I/O module-CPU communication time)
● Total time from keyboard (mouse) command issuance to return signal display on LCD <1s
● System Mean Time Between Failures (MTBF) >25,000 hours
● System Availability Rate: 99.9%
● Common-mode rejection ratio ≥90dB, differential-mode rejection ratio ≥60dB
● DEH-NTK system requires no dedicated grounding network; accepts connection to plant-wide electrical grounding network with ground resistance <5 ohms
● DEH-NTK system operating environment: Temperature -20 to 65°C, relative humidity 5 to 95% RH (non-condensing)
Key Features
● System employs comprehensive redundancy and reliable isolation technologies. Controllers utilize industrial-grade, low-power RISC dual-core POWERPC processors with fanless operation.
● All components feature fully sealed metal enclosures for hot-swappable, rapid replacement with automatic restart—no manual intervention required.
● System software includes fully localized menus. Software rapidly identifies module types without address jumpers or handheld terminals.
● Graphical configuration employs drag-and-drop auto-wiring and adjacent module pin capture technology. Configuration results are directly output as SAMA diagrams, eliminating redundant logic diagram and SAMA diagram drawing.
● All components feature standard, plug-in structures, eliminating cabinet wiring and power connections. Installation requires no specialized tools.
● System standard components, standard cabinets, and standardized engineering design support flexible system expansion.
● Rich, practical, user-friendly, and fully localized real-time monitoring interface.
● Historical data logging, fault analysis, and rapid query capabilities.
● Simulation debugging functionality.
● Multi-functional protocol conversion interfaces facilitate integration with heterogeneous systems.
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A production-oriented enterprise specializing in the processing, production, and research and development of steam turbine components