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Transient calculation method for water turbine power

A calculation method and hydraulic turbine technology, applied in calculation, computer-aided design, design optimization/simulation, etc., can solve problems such as inconvenient application

Inactive Publication Date: 2017-01-25
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

Moreover, this method is inconvenient to apply

Method used

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  • Transient calculation method for water turbine power
  • Transient calculation method for water turbine power
  • Transient calculation method for water turbine power

Examples

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Embodiment 1

[0063] This example is calculated based on the data of a hydropower station.

[0064] Turbine characteristic parameters: rated water head H r =69m, rated flow Q r =5.27m 3 / s, rated power P r = 3359KW.

[0065] The turbine model is: HLA855—LJ—98

[0066] Intake Turbine Volume Loss System k v =0.0.

[0067] Using the comprehensive characteristic curve of a certain type of turbine model to calculate the characteristic parameters under the rated water head.

[0068] Step 1: Calculate the characteristic parameters of the hydraulic system

[0069] ①k h determination of

[0070] Under rated water head, unit speed: n' 10 =70.7869(r / min), unit flow: Q' 10 =0.6606(m 3 / s)

[0071] at unit speed n' 10 = 70.7869 (r / min) line, on both sides of the highest efficiency point, take unit flow increment ± ΔQ' 10 , find two points corresponding to the efficiency. According to the turbine output formula P t =9.81QHη respectively calculate the output P on both sides of the highest...

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Abstract

The invention relates to a transient calculation method for water turbine power and belongs to the technical field of stability analysis and control of water turbines and waterpower sets. The transient calculation method includes firstly, calculating characteristic parameters of a water turbine model and calculating a waterpower loss coefficient kh, mechanical friction loss deltaPm and no-load discharge Qnl of a water turbine flow passage; secondly, extracting and fitting impact loss power, namely fitting by taking (Q-Qz) as a variable so as to obtain a water turbine impact loss change curve along with discharge: deltaPi=F(Q-Qz); thirdly, establishing a water turbine power calculation model Pt(Q)=gammaHrQ(1-kv)-deltaPm-khQ<3>-F(Q-Qz) under the condition of a rated water head; fourthly, revising the impact loss power so as to obtain a water turbine power calculation formula as shown in the specification under any water head of a water turbine. The transient calculation method for the water turbine power provides a convenient calculation method and approach for studying a transient process and stability of waterpower systems and the waterpower sets as well as nonlinear control design of the waterpower sets.

Description

technical field [0001] The invention relates to a transient calculation method of water turbine power, which belongs to the technical field of stability analysis and control of water turbines and hydraulic units. Background technique [0002] Turbine power calculation is the core problem of hydraulic unit transient process calculation. The current calculation methods can be roughly divided into two categories: the approximate calculation method based on the transient calculation of the turbine head and the interpolation calculation method based on the comprehensive characteristic curve of the turbine model. [0003] In the method based on the transient calculation of the water head of the turbine, the theoretical basis is that since the turbine is approximately a rigid element, the transient change of the output of the turbine is actually determined by the dynamics of the hydraulic system. Based on this, the calculation of the transient water head of the turbine has develop...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06G06F30/20
Inventor 曾云钱晶张立翔徐一民徐天茂
Owner KUNMING UNIV OF SCI & TECH
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