Guodian Power Plant
On April 15th, the No. 3 generating unit of the second phase of Guodian Yu Power Plant was successfully put into commercial operation. During the trial operation of 168 hours, the main auxiliary equipment of Unit No. 3 was operating in a good condition. The average loading rate was 100%, and the protection and automatic devices were put into operation. %.
Guodian Yuqi Power Plant is located in Macheng Economic Development Zone, Gaoxin District, Handan City, with convenient transportation and obvious location advantages. State Highway 206, Guodian Railway dedicated lines are east-west through the development zone.
Guodian Power Plant Location
The turbine unit of this project adopts the first 660,000-grade ultra-supercritical secondary reheating machine independently developed by Shanghai Electric. The main steam pressure is 31 MPa, and the reheat steam temperature is 620°C. The main indicators of the steam turbine have surpassed the current domestic The technology and economic indicators of the ultra-supercritical 660,000 units have been built. The third phase of the second phase of the project is starting, rotating, grid-connected, and the load-discharge phase is stable in operation. It has the characteristics of flexible start-up, fast increase rate, and safety and reliability. The control system and auxiliary system of the unit are rationally designed and work reliably. The operating data shows that the temperature, pressure, output, vibration, and noise indicators are qualified. The main performance indicators of the steam turbine meet or exceed the design guarantee value, setting a domestic unit project. The excellent quality and performance results reflect the high level of hard power and design, manufacturing, and quality of the Shanghai Electric brand.
Turbine unit three-dimensional layout
Based on the mature ultra-supercritical system and internationally leading independent secondary reheating technology, Shanghai Electric innovatively introduced the single-stream design concept into the design of the high-parameter reheat module, and developed an efficient high-parameter single-flow high-pressure cylinder module. , To adapt to the requirements of the first stage reheat parameters and flow in the secondary reheat system. Compared to the reheat module of the dual flow design, the drastic reduction of the blade flow loss significantly improves the efficiency of the full cylinder.
Single-flow high pressure cylinder module schematic
In addition, this unit has also applied the integrated valve configuration of the steam inlet valve and the main steam valve to the ultra-supercritical secondary reheat engine type for the first time, adding a means for flexible adjustment of the unit.
Super high pressure steam inlet valve + main steam valve of the joint system
In terms of generators for this project, various advanced technical programs have been applied in product design, including two-dimensional and three-dimensional field finite element electromagnetic calculation stator end electromagnetic calculations, such as the ventilation and temperature rise of the rotor air gap intake system. Study and calculation, stator core, stator end ventilation and temperature rise calculation, rotor winding stress analysis, analysis and study of rotor negative sequence field, analysis of torsional vibration of rotor shaft system, dynamic simulation of interaction between large grid and motor Calculations. In the manufacture of the product, the results of the new process research problems were applied, and a large number of new materials at home and abroad were adopted. The new structure ensures the product quality and ensures the product's operational reliability.
In addition, the project type generators have been put into operation at Huadian Wangting Power Plant, Nanjing Shimonoseki Power Plant, Zhejiang-Nengjing Yueqing Power Plant, Jiangsu Chenjiagang Power Plant, Shanghai Shidongkou Second Power Plant, Fuzhou Power Plant, Weihai Power Plant, etc. , Accumulated a large number of unit operating performance and data.
In the auxiliary engine system, the low-pressure heating system in this project uses five-stage heat recovery, three external low-adders, two internal low-adders, and an external evacuator. The design optimizes each heat exchange section. The structure, etc., guarantees low performance and safety. According to the on-site operating parameters, it shows that the low end of the additive is better than the design value. The condenser is double shell, double back pressure, single flow, surface type, horizontal Arrangement type, equipped with 2 basic body hydrophobic risers and 2 hydrophobic expanders. Its thermal design and structural design are in accordance with the HEI standard. Through the optimization of condenser tube bundle arrangement, the thermal performance and structural design of the condenser are both Achieve a higher level.
Shanghai Electric's integrated and systematic coal-fired technology has been greatly reflected in this project. On the basis of the completion of the first-million-level ultra-supercritical secondary reheat unit, it has once again achieved the first The operation of the 660,000-grade ultra-supercritical secondary reheat unit was put into operation, and the efficiency of the new technology in the field of flexible coal-fired power was again boosted.