T/ZDL 009-2023 Active Group standards

T/ZDL 009-2023 Small-scale hydropower station variable speed constant frequency renovation specifications

Publish Date: 2023-09-22 Implement Date: 2023-10-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/ZDL 009-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: \nMining industry

ICS Name: Hydraulic engineering

Publish Date: 2023-09-22

Implement Date: 2023-10-01

Pages: 11 pages

Scope

Main Technical Content: 6.1 Project Scale and Tasks 6.1.1 Determine the scale of the variable-speed constant-frequency modification project based on hydrological conditions such as river planning, rainfall, water flow velocity, ecological flow, and operational conditions such as the power station’s access system, hydraulic structures, mechanical and electrical equipment, and annual power generation utilization hours. 6.1.2 Use the same power calculation method to compare and analyze parameters such as water utilization rate and multi-year average power generation before and after the variable-speed constant-frequency modification, taking into account the characteristics of small hydropower units, river ecological flow, and the power generation reference flow of upstream and downstream power stations to analyze the economic viability of the modification. 6.2 Excitation System and Generators 6.2.1 Modify the excitation system and generators based on the selected technical path: a) AC excitation double-fed generator power system: The converter provides AC excitation voltage to the rotor excitation winding to achieve variable speed. The AC excitation voltage provided should not exceed the design range in principle. If necessary, the generator rotor can be modified, and the modified rotor should match other components of the generator. b) Brushless double-fed generator power system: The converter provides AC excitation current to the stator excitation winding to achieve variable speed. The AC excitation current provided should not exceed the design range in principle. If necessary, the generator stator can be modified, and the modified stator should match other components of the generator. c) Full-power permanent magnet motor power system: The converter internally supplies DC excitation voltage or current to the generator rotor to achieve variable speed. The DC excitation voltage or current provided should not exceed the design range in principle. If nec