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Method for rapidly stabilizing speed in impulse rotating process of expansion generator set

A generator set, stable speed technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve problems such as unfavorable unit rapid start and grid connection, difficult to achieve fine speed adjustment and fast adjustment control, slow speed control response, etc.

Active Publication Date: 2021-02-19
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Method for rapidly stabilizing speed in impulse rotating process of expansion generator set
  • Method for rapidly stabilizing speed in impulse rotating process of expansion generator set
  • Method for rapidly stabilizing speed in impulse rotating process of expansion generator set

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Embodiment 1

[0038] Embodiment 1: as figure 1 As shown, a method for quickly stabilizing the rotational speed of an expansion generator set during the run-in process, including a rotational speed measurement module, a rotational speed fine adjustment loop, a rotational speed rapid adjustment loop, and a calculation module for the inlet pressure of the final expander stage group.

[0039] Equipment preparation before the implementation of the invention:

[0040]In this embodiment, the rated rotational speed of the generator is 3000 r / min, the number of teeth of the speed measuring gear of the generator is 60, and the frequency of the original signal of the rotational speed of the generator is 50 Hz. The speed measurement module includes two parts: the speed probe and the supporting preamplifier and the speed card. The speed probe adopts Bentley 3500 eddy current sensor and the supporting preamplifier; the sampling frequency of the speed card is 1000Hz, and the operation cycle of the speed c...

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PUM

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Abstract

The invention discloses a method for quickly stabilizing the speed of an expansion generator set in the impulse rotating process. The method comprises the following steps of manually changing the opening degree of an inlet air inlet regulating valve of the expansion generator set to obtain a relation curve between the speed and the inlet pressure of a final-stage expansion unit; setting a speed target value and a rising rate after an impulse command is issued; generating a speed set value at the current moment; processing a speed original signal to obtain the actual speed of the expansion generator set, and measuring the measured value of the inlet pressure of the final-stage expansion unit and the actual speed to obtain the corresponding inlet pressure expected value of the final-stage expansion unit at the current actual speed; receiving the actual speed and the speed set value, and entering PID for operation to obtain xa; directly taking the xa as an opening instruction y of the airinlet adjusting valve when the actual speed is lower than 97% of the speed target value; switching the speed rapid adjusting loop to control the opening degree of the air inlet adjusting valve opening when the actual speed omega i is no less than 97% of the rotating target value; and achieving fine adjustment and rapid adjustment of the 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...

Claims

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Application Information

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IPC IPC(8): F01D15/10F01D21/00
CPCF01D15/10F01D21/00F01D21/003Y02E60/16
Inventor 钟晶亮文贤馗邓彤天李翔张世海王文强王锁斌姜延灿冯庭勇杨大慧
Owner GUIZHOU POWER GRID CO LTD
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