VBM010 TSI system for turbine safety monitoring PHILIPS

Description

Overview

Essential details：VBM010 TSI system for turbine safety monitoring PHILIPS

Turbine Supervisory Instrumentation (TSI) system monitors and measures turbine speed, axial displacement, relative expansion of high and low pressure cylinder, eccentricity, absolute expansion, bearing vibration, bearing cap vibration and other important turbine parameters. When the measured value reaches the set alarm value, an alarm signal is issued to warn the operator. When the set dangerous action value is reached, the output control signal is sent to the ETS turbine emergency interrupting system (Engine Temperature Switch) for tripping. At the same time, the TSI system can also send the monitoring signal collected on site to the TDM turbine vibration analysis system through its signal buffer output interface to achieve abnormal alarm, fault diagnosis, fault query, calculation and analysis, etc. Therefore, the importance of the TSI system is self-evident.
I. Overview
At present, the three major domestic steam turbine plants, the production of 660MW and above turbine generator units, TSI system is generally imported, with Germany epro, the United States Bentley (BENTLY NEVADA), Switzerland Vibro-Meter three equipment is the most common. The TSI system is configured by the respective turbine automation control company according to the specific range of measurement parameters. However, due to the inconsistency between the implementation of the technical standards and the implementation of the power plant, the system configuration is generally in violation of the “National Energy Safety [2014]161 State Energy Administration to prevent power production accidents of the twenty-five key requirements”, “DL/T-261 thermal Power Plant thermal automation system Reliability Evaluation Guidelines”, safety hazards. The reliability of thermal equipment is reduced, and hidden dangers are laid for the safe and stable operation of the generator set. The following takes the TSI system configuration of a 660MW supercritical unit in a plant as an example to talk about understanding and views.

VBM030

2. System configuration
The steam turbine is CLNZK660-24.2/566/566 supercritical, one intermediate reheating, three cylinder and four exhaust steam, direct air condensing steam turbine manufactured by a domestic company. The unit adopts the combined starting mode of high and middle pressure, constant pressure and fixed-sliding operation mode. The TSI system uses the 3500 monitoring system produced by Bentley, USA. The design of the system is completed by its subsidiary automation control company. The system is configured with two 3500/05 instrument frames, and each instrument frame is configured with two redundant 3500/15 power modules. Provide working power for all monitoring modules and external sensors and precursors within the frame to meet all load requirements within the frame. Each instrument frame is equipped with a frame interface module 3500/22, in particular, the module must be placed in the first slot in the frame (next to the power supply). Each instrument frame is configured with a communication gateway module 3500/92, which integrates the monitoring data and status of all frameworks with process control and other automation systems through Ethernet TCP/IP and serial (RS232/RS422/RS485) communication protocols, such as data communication with DCS decentralized control system. In addition to the above basic modules, the specific monitoring function module of the system design is configured as follows:
1, the system is configured with two key phase module 3500/25, each key phase module receives one eddy current sensor input signal, and converts this signal to digital key phase signal. The key phase output signal of one card is sent to the eccentricity monitoring module as the reference of the eccentricity measurement system, and the key signal output of the other card is used to send the gas power Angle measurement system.
2, the system is equipped with 5 large shaft relative vibration detector modules 3500/42M, each module has 4 input channels, used to measure the X and Y direction vibration of the #1~#9 turbogenerator shaft and output the operation stop. In the specific channel distribution, the #1 major axis X, Y direction, #2 major axis X, Y direction vibration distribution on a card, #3 major axis X, Y direction, #4 major axis X, Y direction vibration distribution on a card, and so on, vibration protection using a single point protection, single relay output.
3, the system is equipped with 3 pieces of absolute bearing vibration detector module 3500/42M, used to measure the vibration of #1~#9 turbogenerator bearing cover. In the specific channel distribution, the #1, #2, #3, #4 turbo generator bearing cover vibration is distributed on a clamp, #5, #6, #7, #8 turbo generator bearing cover vibration is distributed on a clamp, #9 turbo generator bearing cover vibration is a separate clamp, the alarm output adopts a single point alarm, single relay output, no stop protection.
4, the system is equipped with a speed/zero speed module 3500/50, two channel input, the sensor is installed in the front box of the steam turbine 60 teeth speed measurement gear plate, one is installed in the steam turbine #5 watt gear motor deceleration gear plate.

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