A Method for Quickly Stabilizing the Rotational Speed ​​of Expansion Generating Sets

Abstract

The invention discloses a method for quickly stabilizing the rotating speed of an expansion generating set during the running process, which includes manually changing the opening of the inlet air intake regulating door of the expanding generating set, and obtaining the relationship curve between the rotating speed and the inlet pressure of the final expander; After the rotation command is issued, set the target speed value and rising rate; generate the given speed value at the current moment; process the original signal of the speed to obtain the actual speed of the expansion generator set, and measure the actual measured value and actual speed of the inlet pressure of the final expander group Obtain the corresponding inlet pressure value of the last stage expander group at the current actual speed; receive the actual speed and the given value of the speed, and enter the PID to calculate x a ;When the actual speed is less than 97% of the speed target value x a Directly used as the opening command y of the intake valve; when the actual speed ω i ≥ 97% of the target value of the rotational speed, put into the rapid adjustment circuit of the rotational speed to control the opening of the air intake adjustment door; realize the fine adjustment and rapid adjustment of the rotational speed of the expansion generator set.

Description

technical field [0001] The invention belongs to the field of control of compressed air energy storage power generation equipment, and in particular relates to a method for rapidly stabilizing the rotating speed of an expansion generating set during the running process. Background technique [0002] With the diversification of energy structure, energy storage technology has been vigorously developed. Among energy storage technologies, compressed air energy storage is a technology with bright prospects, which can play a role in peak shaving and valley filling, storing excess electric energy during low power consumption, and releasing electric energy during peak power consumption. [0003] The work of the compressed air energy storage system is divided into two stages: energy storage and energy release. In the energy storage stage, the excess electric energy of the power grid is used to drive the motor, and then the compressor is driven to compress the air to a high-pressure s...

AI Technical Summary

Problems solved by technology

[0006] At present, the speed control of the expansion generator set mainly has the following problems: 1. Due to the gas-side volume of the heater and the existence of the intake pipe, the intermediate volume between the expanders of each stage is very large, which brings a negative impact on the speed control of the expansion generator set. The response of the speed control is slow and the overshoot is large, so it is difficult to realize the fine adjustment and fast adjustment control of the speed, which is not conducive to the rapid start-up and grid connection of the unit; 2. The traditional speed control only accepts the actual speed as feedback, and the speed change is driven by the rotor. The ultimate expression of the relationship between force and resistance, therefore, only accepting the speed will cause a response lag

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