An optimization method for steam turbine agc system
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An optimization method and steam turbine technology, applied in geometric CAD, computer-aided design, calculation, etc., can solve the problem that it is difficult to meet the adjustment speed and adjustment accuracy at the same time
Active Publication Date: 2020-10-20
哈尔滨沃华智能电力技术有限公司
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[0004] The purpose of the present invention is to solve the problem that it is difficult to meet the two requirements of adjustment rate and adjustment accuracy at the same time through the AGC optimization method of the control system design and adjustment control parameters of the existing heating units, and proposes an optimization of the steam turbine AGC system method
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specific Embodiment approach 1
[0032] Specific implementation mode one: as figure 1 Shown, a kind of optimization method of steam turbine AGC system comprises the following steps:
[0033] Step 1: According to the actual variable load rate V of the unit 0 And the expected variable load rate V that meets the requirements of the AGC assessment 1 Get the optimized ratio K 1 ;
[0034] Step 2: According to the optimized ratio K obtained in Step 1 1 Get the slope K of the tuning characteristic curve:
[0035] K=1+K 1
[0036] Step 3: In order to increase the slope of the characteristic curve, change the slope of the characteristic curve of the regulating valve, and change the value range of the X-axis (comprehensive flow command) of the characteristic curve of the regulating valve from [0,100] to [0,X’], where:
[0037]
[0038] Step 4: Translate the tuning characteristic curve as a whole, so that the value range of the X-axis of the tuning characteristic curve is [0,100];
[0039] Step 5: Correct the...
specific Embodiment approach 2
[0045] Specific embodiment two: the difference between this embodiment and specific embodiment one is that: in the step one, according to the actual variable load rate V of the unit 0 And the expected variable load rate V that meets the requirements of the AGC assessment 1 Get the optimal ratio K 1 Specifically:
[0046]
[0047] Other steps and parameters are the same as in the first embodiment.
specific Embodiment approach 3
[0048] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in the step 4, the overall translation distance X of the adjustment characteristic curve is translated. L for:
[0049] x L = 100-X'.
[0050] Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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Abstract
The invention relates to an optimization method for an AGC system of a steam turbine. The optimization method for improving AGC adjustment performance of the steam turbine solves the problem that it is difficult for existing methods to meet the two demands of adjusting a rate and precision. The method comprises the steps of 1, obtaining an optimization proportion K1 according to an actual variableload rate V0 of a unit and an expected variable load rate V1 for meeting AGC demands; 2, obtaining a valve characteristic curve slope rate K according to the optimization proportion K1 obtained in the step 1; 3, changing a value range of the X axis of a valve flow characteristic curve from [0,100] to [0,X']; 4, conducting the overall translation of the valve flow characteristic curve to make thevalue range of the X axis of the valve flow characteristic curve be [0,100]; 5, correcting X values corresponding to fitting point parameters of DEH function blocks of all valves, and ensuring that corresponding Y values keep unchanged. The optimization method is used in the field of adopting the valve characteristic curve optimization method to improve the AGC comprehensive adjustment performanceof a thermal power unit.
Description
technical field [0001] The invention relates to an optimization method for an AGC system of a steam turbine, in particular to an optimization method for improving the AGC adjustment performance of a heating unit by increasing the slope of the comprehensive flow characteristic of a high-adjustment door. Background technique [0002] At present, my country's requirements for environmental protection are increasing day by day, the power structure is constantly being adjusted, and the proportion of new energy in the energy supply structure is increasing year by year. However, due to the limitations of new energy sources and the high standard requirements of the State Grid for grid stability, thermal power units are more involved in grid peak regulation, especially in recent years, toward deep and fast regulation. develop. At the same time, with the rapid development of the electric power industry, the replacement of small-capacity units by large-capacity units is increasing, an...
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