Pump storage plant generator/ motor rotor rotational inertia test method

Abstract

The invention discloses a method for measuring a pumped storage power station energy production / a motor rotor rotating inertia, which trips off a motor switch and a dynamo magnetic blow-out switch suddenly in a manner of phasing operation to maintain the pressing sate; measures the moderating process of the rotor of the machine set in the pressing state (a turning wheel of a water turbine rotates in pressed air without contacting water body), records time of rotate speed reducing from rated speed to 90% of rated speed; measures the input electric power (active power), the tolerance of a dynamo stator and a rotor, and the winding temperature of the stator and the rotor in the phasing operation of the machine set; calculates iron loss and copper loss of the motor in phasing operation by using the iron loss and copper loss of the stator and the rotor obtained by the experiment of the motor stator, rotor tolerance and motor efficiency; difference value between sum of loss of the two phases to the input electric power of phasing operation of the machine set is the total mechanical consumption of the rotor of the machine set in the moderating process in the pressing state. The total rotation inertia of the machine set can be obtained by total mechanical consumption power and moderating time.

Description

technical field [0001] The invention relates to a test method for testing technical performance parameters of a large-scale power generation / motor, in particular to a method for testing the moment of inertia of a pumped storage power station power generation / motor rotor. Background technique [0002] With the development of the power industry, the capacity and coverage of the power grid are rapidly expanding, and problems such as power grid peak regulation, emergency backup and black start are becoming more and more prominent. my country's economic development and the geographical distribution of hydropower resources are very unbalanced, which brings greater peak-shaving difficulties to the power grid in the eastern region where hydropower resources are scarce. Building a pumped storage power station is an economical and efficient way to solve the above problems. In addition, the construction of nuclear power units also requires the cooperation of pumped storage power plant...

AI Technical Summary

Problems solved by technology

The test method recommended by the national standard and relevant international standards is only for measuring the moment of inertia of the generator / motor rotor. This method is not applicable to the units of large pumped storage power stations, because the generator / motor has been connected to the turbine when it is ready for operation. The runners are installed and connected together, because the shafting and bearings of the unit are designed as a whole, it is not only very uneconomical but also technically infeasible to install the generator / motor separately for the test

In addition, what is actually needed in production is the overall moment of inertia of the rotor of the unit, including the generator rotor and the turbine rotor. It is basically meaningless to measure the moment of inertia of the rotor of the generator / motor itself without measuring the moment of inertia of the turbine runner.