In recent years, with the intensification of competition in the power industry, power production energy saving and consumption reduction has also become a key issue of attention to each power plant, now more and more large-scale thermal power generation units participate in the peak regulation of the power grid, power plant auxiliary equipment demand frequency conversion speed regulation work, together with many power plants high-voltage inverter original control plan is relatively backward, so in the case of ensuring the completion of the power generation mission, reducing power consumption and satisfying the safety of the unit has become the top priority.
A power generation limited company is a holding company of China Huadian Corporation, one of the five major power generation groups, with an installed capacity of 2×600MW and domestic supercritical coal-fired power generation units.
The generator set was ignited in 2007 to generate electricity, and the condensation pump inverter used in the early stage of the power plant has been used for more than 10 years, and needs to be upgraded and renovated to meet the work requirements, save energy, reduce costs and increase efficiency.
According to the overall control requirements of the inverter proposed by the user and the working process requirements of the condensation pump by INVT engineers, a complete set of condensation pump solution plan was provided after a comprehensive analysis.
After the equipment is put into operation, the work is stable and reliable, the operation is simple and convenient, the work record is complete and traceable, the maintenance is small, the starting characteristics are excellent, and the speed regulation performance is good, which has been well received by customers and enriched the use cases of INVT in the five major power generation groups and supercritical generator sets.
Customer value
Stability of the progressive system:
After the new plan is selected, the work record can be traced, the failure rate is low, and the inverter failover is more reliable, which reduces the unplanned downtime of users and improves the production efficiency.
Extend the life of your equipment:
After the frequency conversion speed regulation is selected, when the load is low, the condensed water pump works at low speed, and the necessary cavitation allowance of the pump decreases; The frequency conversion is soft when starting, and the mechanical stress is small, which reduces the power consumption of the condensation pump and the later maintenance cost.
Reliability of the supply network:
When the frequency conversion speed regulation is working, the speed is used to adjust the flow and pressure, which improves the impact on the pipe network system when the valve is adjusted, reduces the possibility of leakage of the pipe network before and after the valve, reduces the noise of the condensation pump and the system, and improves the working environment.
The condensation pump is an important auxiliary equipment for the power plant, INVT used the GD5000 series high-voltage inverter in the 600MW unit, and successfully carried out the inverter transformation of the condensation pump (replacing the original inverter control system), which maximized the reduction of throttling loss, reduced energy consumption, improved economic benefits, and ensured the safety of the condensation water system, and also provided a broad vision for the use of high-voltage inverters on the larger capacity generator sets of the five major power generation groups in the future.
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