Quality appraisal of steam turbine generator

A steam turbine generator is a generator driven by a steam turbine. Its working principle is based on electromagnetic induction. The main components of a steam turbine generator include boiler, steam turbine, condenser, circulating water pump, condensate water pump and feed water heating device. The superheated steam generated by the boiler enters the steam turbine and expands to do work, causing the blades to rotate, thereby driving the generator to generate electricity. This process realizes the conversion of mechanical energy into electrical energy. After the work is done, the waste steam is processed by the condenser, circulating water pump, condensate water pump, feed water heating device, etc., and then returned to the boiler for recycling, forming a closed-loop system.
In the case of turbine generator quality appraisal, Zhongke Testing can provide turbine generator quality appraisal services.

1. Material quality: The materials of the turbine generator should meet the design requirements and have sufficient strength and toughness. The quality of materials can be identified through chemical composition analysis, metallographic examination and other methods.
2. Manufacturing process: The manufacturing process of turbine generators should comply with relevant standards and specifications, including processing, welding, heat treatment and other processes. The quality of the manufacturing process can be evaluated through inspection of welds, surface flatness, etc.
3. Testing method: Quality testing of turbine generators can use non-destructive testing technology, such as ultrasonic testing, radiographic testing, etc. These technologies can detect hidden defects such as cracks, pores, etc.
4. Dimensional accuracy: The size of the turbine generator should meet the design requirements, including the rotor, stator, impeller and other parts. Dimensional accuracy can be checked through gauges and measuring instruments.
5. Insulation performance: The insulation material of the turbine generator should comply with relevant standards and specifications and have sufficient insulation performance. Insulation performance can be evaluated through methods such as insulation resistance testing.
6. Overall machine performance: The overall machine performance of the turbine generator includes output electric power, efficiency, power factor, etc. Overall machine performance can be evaluated through actual testing and inspection.
7. Trial operation and commissioning: During the installation and commissioning process, the turbine generator should be trial run to ensure its normal operation, safety and reliability.

GB/T 29626-2019 Application Guidelines for Turbine Generator Condition Online Monitoring System
GB/T 36043-2018 Technical Specifications for Dynamic Characteristics of Shafting of Large Turbine Generator Sets
DL/T 5210.3-2018 Construction Quality Acceptance Regulations for Electric Power Construction Part 3: Turbine Generator Sets
NB/T 25083-2018 Technical Guidelines for Basic Vibration Isolation Testing of Nuclear Power Plant Turbine Generator Units
JB/T 8888-2018 Test Method for Measuring Residual Stress of Steam Turbine and Turbine Generator Rotor Forgings by Ring Core Method
JB/T 7026-2018 Technical Conditions for Turbine Generator Rotor Forgings Below 50MW
JB/T 4010-2018 Ultrasonic inspection of steel retaining rings of turbine generators
DL/T 607-2017 Inspection of water leakage and hydrogen leakage of turbine generators
DL/T 1766.1-2017 Inspection guidelines for water-hydrogen hydrogen-cooled turbine generators Part 1: General principles
NB/T 25067-2017 Nuclear power plant turbine generator instrumentation and control technical conditions
0NB/T 42085-2016 Turbine generator shafting torsional vibration monitoring and protection device technical requirements
1

The turbine generator set purchased by a waste gas power generation company did not meet the technical requirements agreed in the agreement, and a dispute arose with the equipment manufacturer.
was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" in the turbine generator involved.
identification and analysis results:
The identification and analysis expert group discussed and comprehensively quality-technically analyzed the relevant information and on-site investigation of the turbine generator involved in the case, and made the following suggestions and conclusions:
Among the two turbine generators involved in the case, the stator voltage of one of the turbine generators was 6300V, which did not meet the 10500V technical parameter requirements stipulated in the contract.