GB17621-1998
Specification of reservoir operation for large and medium-scale hydropower stations
大中型水电站水库调度规范
GB 17621-1998 is a current mandatory Chinese national standard for Specification of reservoir operation for large and medium-scale hydropower stations. It appears in the Construction compliance cluster with a electrical safety focus and has an implementation date of Apr 1, 1999.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard establishes the principles, tasks, and management requirements for the operation of large and medium-scale hydropower stations. It is specifically applicable to the reservoir dispatch of these facilities, while other types of reservoirs may refer to it as a guideline. It is mandatory for all relevant dispatch management units and their superior administrative departments to ensure project safety and maximize comprehensive utilization benefits.
Technical requirements
The standard outlines the fundamental parameters and basic data required for reservoir operation, including normal pool level, design flood level, and various capacity curves. It mandates that management units must maintain complete design data and hydrological records. Design parameters and indicators cannot be altered arbitrarily without proper approval. For flood dispatch, the standard prioritizes dam safety while adhering to design flood control standards. It specifies the division of responsibilities during flood seasons, emphasizing that flood control capacity usage above the flood limit level must be directed by authorized flood control command departments. Management units must formulate annual flood dispatch plans and emergency schemes for floods exceeding the check flood level. Regarding power generation and other beneficial uses, the standard requires the creation of a reservoir dispatch chart to guide water allocation among competing demands like irrigation, water supply, and navigation. It emphasizes the need to optimize peak-shaving and frequency regulation in the power grid. Operations must strictly follow the dispatch chart and not exceed planned water usage limits. The standard also sets strict rules for the management of the reservoir area and downstream river channels. It prohibits unauthorized development within the land acquisition line and restricts activities within a 300-meter management zone around the dam axis. Any obstacles affecting the downstream river's designed water discharge capacity must be removed.
Testing methods
The standard does not prescribe traditional laboratory testing methods; instead, it outlines hydrological and operational evaluation procedures. These include hydro-meteorological forecasting, reservoir routing calculations, and the verification of discharge curves and capacity-area curves. Management units must conduct regular reviews of reservoir parameters, typically every 5 to 10 years, or when hydrological conditions change significantly. It also mandates the assessment of water conservation and increased power generation efficiency.
FAQs
What types of facilities are regulated under GB 17621-1998?
The standard applies to large and medium-scale hydropower stations. While primarily targeting these facilities, other types of reservoirs may also refer to this standard for operational guidance.
How does GB 17621-1998 define the priorities during flood dispatch?
The standard mandates that flood dispatch above the flood control limit level must strictly follow the commands of the authorized flood control authority. During flood seasons, dam safety is the absolute priority, while actively mitigating downstream disasters.
What are the key principles for power generation and water dispatch under this standard?
It requires the creation of a reservoir dispatch chart combined with hydrological forecasting. It dictates specific operational zones (guaranteed, increased, or reduced supply) and prohibits water levels from dropping below the dead water level except in special, approved circumstances.
The summary above provides a high-level overview of GB 17621-1998. To ensure complete compliance for your hydropower operations in the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 17621-1998 today to access all detailed parameters, operational rules, and management procedures.
Applicability hints
- Type
- Management
- CCS
- P59
- ICS
- 27.140
- Competent department
- National Energy Administration
- Technical committee
- National Energy Administration