NB/T 10342-2019Guide for Hydraulic Transient Guarantee Design of Hydropower Stations (English PDF)

Foreword

According to the "Notice of the National Energy Administration on Issuing the First Batch of Industry Standard System (Revision) Plans in the Energy Sector in 2012" (National Energy Administration Neng Technology [2012] No. 83), the guidelines compilation team has conducted extensive investigations and studies, earnestly summarized practical experience, and conducted extensive Based on soliciting opinions, formulate this guideline.

The main technical contents of this guideline are. basic regulations, determination of calculated control values in the hydraulic transition process, selection of calculation conditions, The calculation and adjustment of the hydraulic transition process guarantee the determination of the design value, and the adjustment guarantee the design results and application.

1 General...1

1.0.1 This guideline is formulated in order to standardize the regulation and guarantee design work of hydropower stations.

1.0.2 This guideline is applicable to the regulation guarantee design of newly constructed, rebuilt and expanded hydropower stations.

1.0.3 The regulation guarantee design of the hydropower station shall not only comply with this guideline, but shall also comply with the current relevant national standards.

3 Basic regulations...4

4 Determining the calculated control value of the hydraulic transition process...5

3.0.1 The regulation guarantee design of the water transmission and power generation system of a hydropower station shall follow the principles of ensuring safety, economy and rationality.

3.0.2 Regarding the design conditions of the regulation guarantee, the extreme values of the parameters appearing during the hydraulic transition of the water transmission and power generation system should not exceed the regulation guarantee.

It is necessary to ensure that the unit and water conveyance structure do not damage the structure of the unit and the water conveyance structure for the adjustment and assurance check working conditions.

3.0.3 In the pre-feasibility study stage, according to the preliminary drafted unit parameters and water delivery structure parameters, etc.

The situation put forward the preliminary results of hydropower station regulation guarantee design.

3.0.4 In the feasibility study stage, the calculation results of the hydraulic transition process of the water transmission and power generation system shall be combined to establish unit parameters and water transmission construction.

Technical and economic comparison and optimization of the building type, size, etc.; should be based on the selected unit parameters, water delivery building parameters, and main Wiring type and access system method, etc., propose adjustment guarantee design values and corresponding operating rules for hydropower stations, and evaluate their water Safety and operational stability under the conditions of the power transition process; for large hydropower stations and pumped storage power stations with complex water delivery systems, At least two different hydraulic transition process calculation software should be used for calculation comparison and analysis, and special research should be carried out.

3.0.5 During the detailed construction drawing stage, the design should be checked and adjusted according to the determined water delivery system parameters and the characteristics of the water turbine generator set to ensure that the design is fruit.

3.0.6 When there are changes in the parameters of the water transmission and power generation system, review and adjustment should be made to ensure the design results.

3.0.7 When the load rejection guide vane of the unit is normally closed, the inlet valve should not participate in the flow adjustment of the hydraulic transition process of the water transmission and power generation system. Section.

3.0.8 Before obtaining the hydraulic turbine/pump-turbine characteristic curve of the hydropower station, the guide vane closing rule during the calculation of the hydraulic transition process It should be closed in a straight line.

3.0.9 The influence of the moment of inertia of the water body should be included in the calculation of the hydraulic transition process of axial flow and tubular hydropower stations, and the backwater should be included. Click Calculate.

2 For axial flow unit, 70%~50% should be used.

4 Determining the calculated control value of the hydraulic transition process

4.1 Calculation of the control value of large fluctuations in the hydraulic transition process...5

4.2 Calculation of control values for small fluctuations in hydraulic transition process...5

4.3 Calculation control value of hydraulic interference in hydraulic transition process...6

4.1 Calculation of the control value of large fluctuations in the hydraulic transition process

4.1.1 The calculated control value of the maximum pressure rise rate at the inlet of the volute for load rejection of the unit, the reference value is the upstream normal storage level and the machine The difference in installation elevation of the group shall meet the following requirements.

1 For the tubular unit, it should be 100%~60%.

3 For mixed flow units, when the rated water head is less than 100m, it should be 60%~30%; […]

5 Selection of calculation conditions...7

Appendix A Calculation Conditions for Large Fluctuations in the Hydraulic Transition Process...11 Appendix B Calculation Conditions for Small Fluctuations in the Hydraulic Transition Process...16 Appendix C Hydraulic Interference Calculation Conditions in the Hydraulic Transition Process...17 Explanation of terms used in this guideline...18 List of Reference Standards...19 Attachment. Article description...20 […]

6 Calculation of hydraulic transition process...8

7 Adjustment to ensure design value determination...9