A Review of Critical Stable Sectional Areas for the Surge Tanks of Hydropower Stations

Abstract

The critical stable sectional area (CSSA) for surge tanks corresponds to the critical stable state of hydropower stations and is an important index to evaluate the stability of the turbine regulation system. The research on CSSA for surge tanks is always one of the most important topics in the area of transient processes of hydropower stations. The CSSA for surge tanks provides the value basis for the sectional area of surge tanks. In engineering practice, the CSSA for surge tanks is widely used to guide their hydraulic design. This paper provides a systematic literature review about the CSSA for surge tank of hydropower stations. Firstly, the CSSA for surge tanks based on hydraulic transients is discussed. Secondly, the CSSA for surge tanks based on hydraulic-mechanical-electrical coupling transients is presented. Thirdly, the CSSA for air cushion surge tanks is illustrated. Finally, the CSSA for combined surge tanks, i.e., upstream and downstream double surge tanks and upstream series double surge tanks, is presented. In future research, the CSSA for surge tanks of pumped storage power stations should be explored. The CSSA for surge tanks considering multi-energy complement is worth studying.

Optimization of hydraulic parameters for pipeline system of hydropower station with super long headrace tunnel based on mayfly algorithm considering operational scenarios

“…Therefore, the joint optimization of the hydraulic parameters for pipeline system and the mechanical and electrical parameters for turbine unit system is more reasonable and worth studying. (2) The object of the present study is the HSSLHT. At present, the pumped storage power station plays an important role in the power grid.…”

“…The pipeline system is an important component of hydropower stations. The optimization of hydraulic parameters for pipeline system is the key aspect of the design of hydropower stations 1,2 . The hydraulic parameters for pipeline systems directly influence the safety, stability, and economy of the steady processes and transient processes.…”

“…The optimization of hydraulic parameters for pipeline system is the key aspect of the design of hydropower stations. 1,2 The hydraulic parameters for pipeline systems directly influence the safety, stability, and economy of the steady processes and transient processes. On the one hand, the pipeline system includes several subcomponents, and each subcomponent has several hydraulic parameters.…”

Operational Stability of Hydropower Plant with Upstream and Downstream Surge Chambers during Small Load Disturbance

“…To relieve serious water-hammer pressure in hydropower systems, surge chambers should be set both in the upstream headrace tunnel and the downstream tailrace tunnel. Nowadays, hydropower plants with upstream and downstream surge chambers (HPUDSC) are becoming more and more widespread [12].…”

Stability Criterion for Mass Oscillation in the Surge Tank of a Hydropower Station Considering Velocity Head and Throttle Loss

“…Guo [18] proposed the concept of critical stable sectional area of ST under primary frequency regulation and pointed out that the critical stable sectional area of ST and governor parameters jointly determine the distributions of the system's stability state. Moreover, he also systematically reviewed the relevant literature on the critical stable section of the ST based on hydraulic transients and hydraulic-mechanical-electrical coupling transients [19]. Considering the interconnected operating effect of two hydropower plants, Yu [20] analyzed the impact of the cross-sectional area of STs on the stable region.…”