Foreword
According to the Ministry of Housing and Urban-Rural Development "on the issuance of <2017 engineering construction standards and regulations and related work plan> notice" (Jianbiao [2016] No. 248) the requirements of the standard preparation group after extensive investigation and research, seriously summarize the practical experience, reference to relevant international standards and advanced foreign standards, and on the basis of extensive consultation, revised this standard. The main technical content of this standard: general, terminology, analysis and evaluation of the current situation, performance testing, transformation content and requirements, technical performance indicators, project acceptance.
The main technical content of this standard revision.
1. increased the provisions of the power station mechanical and electrical equipment end-of-life update.
2. Increased the analysis and evaluation of the current state of ecological flow.
3. Increased the content of small-capacity high-voltage generator can be changed to low-voltage generator.
4. increased the configuration of mobile communication equipment to monitor the operation of the power station.
5. Increased the content of the technical transformation of the plant
6. increased the content of the ecological flow release facilities; 7. improved the efficiency indicators of some units. This standard is managed by the Ministry of Housing and Urban-Rural Development
1 General Provisions
1.0.1 To regulate the technical transformation of small hydropower plants, promote the technical progress of power stations, scientific use of hydro energy resources, eliminate safety hazards, ensure operational safety, improve production technology and energy efficiency, improve the ecological environment, the development of this standard.
1.0.2 This standard applies to the single station installed capacity of 500kW ~ 50000kw of small hydropower station technology transformation.
1.0.3 small hydropower station technology transformation should follow the safe and reliable, green, technically sound, economical and applicable principles, making full use of existing facilities or equipment in hydropower stations, and actively use mature new technologies, new processes, new equipment, new materials.
1.0.4 small hydropower station before the technical transformation, should prepare the relevant design report. When the mechanical and electrical equipment in line with the current national standard "small hydropower station mechanical and electrical equipment scrapping conditions" GB / T 30951 should be timely scrapping update.
1.0.5 small hydropower station technology transformation, in addition to this standard, should also meet the provisions of the relevant national standards, and meet the needs of the ecological flow of the river discharge.
2 terms
2.0 made
Take technical measures, small hydropower plant facilities or equipment to modify, update, increase or reduce capacity, improve its reliability, economy, reasonableness and advanced activities.
2.02 Renewal
To improve the performance of facilities or equipment, improve efficiency and reliability, the small hydropower plant facilities or equipment to update the activities.
2.0.3 capacity building
Technical transformation of mechanical and electrical equipment to increase the installed capacity of the power station, improve performance, improve efficiency and reliability of the activities.
2.0.4 capacity reduction transformation
Technical transformation of electromechanical equipment to reasonably reduce the installed capacity of the power station, improve performance, optimize the operating area, improve efficiency and reliability activities.
3 Analysis and evaluation of the current situation
3.0.1 small hydropower station technology transformation should collect the following information.
1 engineering design, completion and operation information.
2 hydrology, sediment information.
Safety inspection and performance testing or evaluation information.
Other relevant information.
3.0.2 small hydropower station before the technical transformation, should be based on the results of safety testing or assessment, operation and maintenance information, hydraulic buildings, hydraulic machinery, electrical, metal structures and other facilities or equipment for safety analysis, and make technical transformation of the need to evaluate.
3.0.3 small hydropower station before the technical transformation, should be based on river planning and the latest hydrological data, the water resources available for analysis and evaluation, and should include the following: 1 if necessary, runoff and flooding to review
The possibility of increase or decrease of working head and flow.
The amount of water available for disposal.
Conditions to reduce head loss and flow loss: ecological flow and release facilities.
4 Performance tests
4.0.1 For hydro generator sets with a single capacity of 10000kW and above, performance comparison test shall be conducted before and after technical transformation.
4.0.2 The hydraulic turbine performance test shall be conducted according to the relevant provisions of the current national standard "Field Acceptance Test Procedure for Small Hydraulic Turbines" GB/T 22140 or "Field Acceptance Test Procedure for Hydraulic Performance of Hydraulic Turbine Storage Pump and Pump Hydraulic Turbine" GB/T 20043 according to specific conditions.
4.0.3 on the main mechanical and electrical equipment over the design life or affect the safe operation of the power station, there are abnormalities, according to the current national standard "small hydropower station safety testing and evaluation specifications" GB / T 50876 for testing and evaluation. 4.0.4 steel gates and opening and closing machine testing can be in accordance with the current industry standard "hydraulic steel gates and opening and closing machine safety testing technical regulations" SL10L of the relevant provisions. The provisions of the implementation. Pressure steel pipe detection can be in accordance with the current industry standard "Pressure Steel Pipe Safety Inspection Technical Regulations" NB/T 1349 the relevant provisions of the implementation.
4.0.5 small hydropower station main electrical equipment performance test, before the transformation can be used to prevent the test report or the current performance test results, after the transformation should be in accordance with the current national standard "electrical installation project electrical equipment handover test standards" GB50150 for testing and acceptance.
4.0.6 testing and evaluation results should be used as a basis for determining the need for technical transformation of small hydropower stations, transformation programs and assessment of the effectiveness of technical transformation
5 transformation content and requirements
5.1 General provisions
5.1.1 one of the following circumstances, should be technical transformation.
There are safety hazards.
Upstream and downstream hydrological characteristics of the parameters have changed significantly.
Unreasonable use of water and energy resources.
Civil construction, equipment manufacturing or installation quality is poor, equipment performance is backward, poor technical condition.
Geological conditions have changed.
No ecological flow release facilities.
Electrical and mechanical equipment in line with the scrapping conditions.
Other situations that require transformation.
6 technical performance indicators
6.0.1 small hydropower station after the technical transformation of the unit power and unit efficiency, should meet the following requirements.
Unit output power should meet the technical transformation design requirements.
Unit efficiency under rated operating conditions should not be lower than the provisions of Table 6.0.1, and based on the single-unit power from high to low value.
7 Project acceptance
7.0.1 small hydropower station technology transformation should be completed in a timely manner after acceptance
7.0.2 small hydropower station technical transformation acceptance can be in accordance with the current industry standard "small hydropower station construction acceptance procedures" SL168 the relevant provisions of the implementation.
7.0.3 partial technical transformation of small hydropower station, the trial run period can be appropriately shortened, and should simplify the acceptance procedures
The standard terminology
List of cited standards
GB 50071 Small hydropower station design specifications
GB 50150 The electrical installation project electrical equipment handover test standards
GB/T 50876 Specifications for Safety Testing and Evaluation of Small Hydropower Stations
GB/T 4208 Enclosure Protection Level (IP Code)
GB/T 8564 Technical Specification for Installation of Hydraulic Turbine Generator Sets
GB/T 15469.1 Evaluation of cavitation of hydraulic turbines, accumulator pumps and water pump turbines Part 1: Evaluation of cavitation of impact hydraulic turbines
GB/T 19184 Water bucket type turbine cavitation evaluation
GB/T 20043 Field Acceptance Test Procedures for Hydraulic Performance of Hydraulic Turbines, Accumulator Pumps and Water Pump Turbines
GB/T 21718 Basic Technical Conditions of Small Hydraulic Turbines
GB/T 22140 Regulations for Field Acceptance Tests of Small Hydraulic Turbines
GB/T 27989 Basic Technical Conditions of Small Hydro Generator
GB/T 30951 Scrapping Conditions of Mechanical and Electrical Equipment for Small Hydropower Stations
NB/T 10349 Technical Regulations for Safety Inspection of Pressure Steel Pipe
NB/T 42034 Design Guidelines for Small Hydropower Units Operating in Isolated Networks
SL101 Technical Regulations for Safety Inspection of Hydraulic Steel Gates and Closing Machines
SL168 Acceptance Regulations for Construction Works of Small Hydropower Station
SL203 Code for Seismic Design of Hydraulic Buildings
SL226 Metal Structure Scrapping Standards for Water Conservancy and Hydropower Engineering
SL229 Design Code for Automation of Small Hydropower Stations
SL696 Basic Technical Conditions for Small Hydraulic Turbine Inlet Valves
SL725 Design Specification for Safety Monitoring of Water Conservancy and Hydropower Projects
SL/T 796 Technical Guidelines for Dewatering Prevention and Control of Downstream Streams of Small Hydropower Stations
Foreword
1 General Provisions
2 terms
2.0.3 capacity building
3 Analysis and evaluation of the current situation
4 Performance tests
5 transformation content and requirements
6 technical performance indicators
7 Project acceptance
List of cited standards
