Method for setting valve flow characteristic curve of steam turbine

A technology of valve flow rate and characteristic curve, which is applied in the field of steam turbines, can solve problems such as failure, and achieve the effect of saving time and high reliability
CN110346121AInactive Publication Date: 2019-10-18JILIN ELECTRIC POWER RES INST +1
4 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN ELECTRIC POWER RES INST
Publication Date
2019-10-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for setting a valve flow characteristic curve of a steam turbine and belongs to the technical field of steam turbines. An overlap function is calculated by using datain single valve operation of a unit to obtain a new valve flow curve, and the reliability of a new characteristic curve is verified by using the data obtained in sequence valve operation of the unit.According to the method, valve flow characteristic parameters of the steam turbine can be completely and specifically set, so that switching between single valve and sequence valves is smooth, steam flow change is gentle during switching, load fluctuation is small, segment temperature and vibration do not greatly change and safe and stable operation of the unit is ensured; the response rate of AGCis optimized and the primary frequency modulation effect is improved; the overlap of regulating valves is reduced to improve the economy of the unit; and computation is simplified by using MATLAB programming.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of steam turbines, in particular to a method for setting the flow characteristic curve of a steam turbine valve. Background technique

[0002] The valve flow characteristic is the corresponding relationship between the valve opening and the steam flow through the valve. If the valve flow characteristic curve of the steam turbine differs greatly from the actual valve flow characteristic, there may be problems of sudden load change and slow adjustment during unit variable load and primary frequency regulation, resulting in difficulty in unit control, affecting unit safety and variable load capacity, and bringing certain economic loss.

[0003] Most of the existing setting methods are based on the experience of technicians based on the data in the operating state of the sequence valve of the unit. The workload is heavy and the requirements for technicians are high. Some even only change the characteristics of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More