The pumped storage power station plays a vital role in modern power systems, where the key component is the pump turbine. Variable-speed operation can improve the operating efficiency of the pump ...
The working condition parameter of the pumped storage unit is very important for the start-up process of PSURS. The reasonable setting value of working condition parameters can reduce the oscillation of the PSU and realize fast and stable grid connection, which is conducive to improving the reliability of the power system and stabilizing the ...
The variable speed pumped storage unit with a full-size converter (FSC-VSPSU) can provide fast and flexible regulation capacity for the power grid, assisting the rapid development of the new energy-dominated power systems, and its application is gradually becoming widespread. The excitation system of FSC-VSPSU is crucial for maintaining the …
This paper proposes a multi-objective optimization method for the start-up strategy of pumped storage units (PSU) for the first time. In the multi-objective optimization method, the speed rise time and the overshoot during the process of the start-up are taken as the objectives. A precise simulation platform is built for simulating the transient process of start-up, …
Parameter identification is an important method to establish the governing system of a pumped storage unit. Appropriate parameters will make the governing system obtain better control performance.
Parameter identification is an important method to establish the governing system of a pumped storage unit. Appropriate parameters will make the governing system …
The pumped storage unit regulating system is a feedback control system composed of a water diversion system, governor (including servo mechanism and controller), pumped storage unit, generator, and load units. In this section, the mathematical model of a single pipe and a single turbine is established. Figure1is the structure of a pumped ...
The harsh operating environment aggravates the degradation of pumped storage units (PSUs). Degradation trend prediction (DTP) provides important support for the condition-based maintenance of PSUs. However, the complexity of the performance degradation index (PDI) sequence poses a severe challenge of the reliability of DTP. Additionally, the …
Accurate parameter identification of pump turbine governing system (PTGS) is of great importance to the precise modeling of pumped storage unit. As PTGS is characterized by uncertainties and strong nonlinear characteristics, it is difficult to identify its parameters. To solve the parameter identification problem for PTGS, an improved backtracking search algorithm …
Parameter identification is an important method to establish the governing system of a pumped storage unit. Appropriate parameters will make the governing system obtain better control performance. … Expand. 11. PDF. Save. Group strategy of dissertation defense based on greedy retrospective hybrid algorithm.
With the increasing of intermittent renewable energy (RE) sources such as wind and solar energy connected to the power grid, the power security and stability are seriously challenged [1], [2].Pumped storage units (PSU), as energy storage device (ESD) in renewable energy power grid (REPG), have the features of non-pollution, flexible operation and strong …
For the nonlinear pumped storage unit regulation system, the specific steps of Hopf bifurcation analysis are as follows [[45], ... Operating points will affect the frequency and damping of the unit speed, and by selecting the appropriate governor PID parameters to change the unit damping and frequency, the amplitude of the unit can be reduced ...
This paper adopts the actual parameters of a pumped storage power station with a unit capacity of 300 MW in Hubei province, China, which has been applied in practical studies for …
: Parameter identification is an important method to establish the governing system of a pumped storage unit. Appropriate parameters will make the governing system obtain better control performance. Therefore, in this study, an improved artificial hummingbird algorithm (IAHA) is proposed for the parameter identification of the governing system in a pumped …
Currently, the new power system is evolving from the traditional "generation-network-load" triad to a four-element system of "generation-network-load-storage", and energy storage has gradually become a still small but essential adjusting resource in the new power grid [1, 2].As the largest scale, most mature technology, and most environmentally friendly energy storage resource, …
Parameter identification is an important method to establish the governing system of a pumped storage unit. Appropriate parameters will make the governing system obtain better control performance. Therefore, in this study, an improved artificial hummingbird algorithm (IAHA) is proposed for the parameter identification of the governing system in a …
The pumped storage unit parameters. 2.2. Power system unit commitment model. ... Random Entropy-TOPSIS method for comprehensive evaluation of the relationship between the flexibility and stability of pumped storage units. The method enhances the objectivity of the evaluation by introducing more sets of random entropy weights to reduce potential ...
Constructing pumped-storage units between two upstream and downstream reservoirs is an effective method to further expand the capacity of flexible resources. This method transforms cascaded hydropower stations into a cascaded pumped-hydro-energy storage system. ... The input data include parameters of CHSs, parameters of thermal power units ...
The composition of doubly fed variable-speed pumped storage unit is introduced, and the mathematical model of every component is proposed. ... and the parameters of the unit in each control ...
The different kinds of parameter uncertainty, such as periodic excitations, random noises, unbalanced hydraulic forces and random power load, are considered. The …
Pumped storage unit (PSU) are playing an important role in frequency regulation and power generation [1].However, since PSU has always been operating in a relatively harsh environment, the problem of structural fatigue and deterioration are increasingly prominent [2] general, degradation trend prediction (DTP) mainly includes physics-based methods and data …
As the core control system of pumped storage units, the pumped storage governing system (PSGS) undertakes the important tasks of manipulating the start-up and …
pumped storage unit. Appropriate parameters will make the governing system obtain better control performance. Therefore, in this study, an improved artificial hummingbird algorithm (IAHA) is
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