A control method that can promote supercritical units to participate in wind power consumption

A technology of supercritical units and control methods, applied in the direction of reducing/preventing power oscillations, etc., can solve the problems of poor stability of operating parameters of supercritical units against wind power disturbances, achieve enhanced anti-wind power disturbances, stabilize operating parameters, and improve wind power The effect of permeability

Active Publication Date: 2021-07-13
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of the existing supercritical unit’s ability to resist wind power disturbance and the stability of the unit’s internal operating parameters, and propose a control method that can promote the supercritical unit’s participation in wind power consumption

Method used

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  • A control method that can promote supercritical units to participate in wind power consumption
  • A control method that can promote supercritical units to participate in wind power consumption
  • A control method that can promote supercritical units to participate in wind power consumption

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specific Embodiment approach 1

[0048] Specific implementation mode one: the following combination Figure 2 to Figure 4 Describe this embodiment, a control method that can promote supercritical units to participate in wind power consumption described in this embodiment, the method includes:

[0049]Step 1. Periodically collect the wind power signal, use the collected wind power signal to construct a periodic boiler input acceleration signal BIR, and add the constructed boiler input acceleration signal BIR to the boiler load command BM;

[0050] Step 2. For the steam pressure deviation signal Δp T The absolute value of is compared with the threshold A; when |Δp T When |≤A, execute step 3; where, A is greater than 0;

[0051] when |Δp T When |>A, correct the boiler load command BM in step 1 to obtain the corrected boiler load command BM′, and output the corrected boiler load command BM′ to the boiler of the supercritical unit to realize the participation of the supercritical unit in wind power consumption...

specific Embodiment approach 2

[0053] Embodiment 2. This embodiment is a further description of the control method that can promote the supercritical unit to participate in wind power consumption described in Embodiment 1. In step 1, the method for constructing the boiler input acceleration signal BIR is:

[0054] Let the boiler input acceleration signal BIR be X(t), and the integral of the boiler input acceleration signal be I x , Y(t) is the main steam temperature signal, and the integral of the main steam temperature signal is I Y , the rising time of X(t) is 0~T 1 , the stationary time is T 1 ~T 2 , the fall time is T 2 ~T 3 ;

[0055] and expression for:

[0056]

[0057]

[0058] is the integral of the boiler input acceleration signal at time i; is the integral of the main steam temperature signal at time i; using I X1 and I X2 Calculate the value of the boiler input acceleration signal BIR time T 1 ~T 2 Amplitude when:

[0059]

[0060] Among them, t 1 for T 1 , t 2 for...

specific Embodiment approach 3

[0077] Specific embodiment three: This embodiment is a further description of the control method that can promote supercritical units to participate in wind power consumption described in specific embodiment one or two. In step one, the cycle of periodically collecting wind power signals is 32s .

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Abstract

A control method capable of promoting supercritical units to participate in wind power consumption belongs to the field of wind power unit tuning control. The invention aims to solve the problem that the existing supercritical unit control technology cannot quickly and accurately supplement the heat storage required by the unit to track large-scale power changes under the premise of ensuring the stability of the internal operation parameters of the unit. The present invention periodically collects wind power signals, uses the collected wind power signals to construct a periodic boiler input acceleration signal BIR, and adds the constructed boiler input acceleration signal BIR to the boiler load command BM; for the steam pressure deviation signal Δp T The absolute value of is compared with the threshold A; when |△p T |≤A, and △p T When ×△f<0, the grid source energy is in accordance with the trend, the steam turbine load command TM is corrected, and the corrected steam turbine load command TM′ is output to the steam turbine in the supercritical unit, when |△p T When |>A, the boiler load command BM added to the boiler input acceleration signal BIR is corrected to obtain the corrected boiler load command BM′. The invention is suitable for the use of the supercritical unit participating in the frequency regulation of the power grid.

Description

technical field [0001] The invention belongs to the field of wind turbine tuning control. Background technique [0002] With the depletion of fossil energy, wind power has attracted widespread attention. However, wind power has natural volatility and intermittency, and the existing wind power forecasting methods are not perfect. The increase of wind power penetration will pose a great challenge to the frequency regulation capability of the power system. At the same time, since wind turbines do not have frequency modulation capabilities, the increase in wind power penetration will reduce the overall inertia of the power system. [0003] Facing the above problems, under the condition that the cost of energy storage is high and the frequency regulation capacity of the grid cannot be further improved, the grid side would rather choose to abandon the wind to maintain its own stability, resulting in a great waste of wind power resources. The national average wind abandonment rat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 郭钰锋陈润欣张冬蕊王琦
Owner HARBIN INST OF TECH
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