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Design of three-stage start-up optimal strategy based on fuzzy ...
When the pumped storage unit (PSU) operates in the low water heads, it is easy to enter the ''S'' characteristic area, which leads to the chaotic phenomenon of the hydraulic transient of the PSU and makes the adjustment and control of the PSU under the no-load start-up condition extremely difficult this paper, a strategy of integrating three …
Research on control strategy of full
Then we introduce two control methods of variable speed pumped storage unit, namely power priority control method, and speed priority control method. And then, the influence of the value of the internal parameters of the unit on the control characteristics of the unit is analyzed, and the control system of the unit is designed …
Journal of Energy Storage
Pumped storage unit (PSU) is a special kind of hydropower unit, that undertakes the task of power generation, and performs the function of energy storage. ... The system order can be estimated by theoretical analysis or identification methods. Therefore, PG is set as a 10-dimensional vector, i.e., the output of the system at the …
Doubly-Fed Variable-Speed Pumped Storage Unit
Abstract: The doubly-fed variable speed pumped storage unit is a storage system suitable for joint operation with renewable energy sources to smooth the imbalance between renewable energy supply ...
Research on Control Parameter Setting Method of AC Excitation …
This work focuses on the converter control links of variable speed pumped storage unit, proposed the principle of dynamic correction for AC excitation system of variable speed pumped storage unit, based on the dynamic correction method widely used in synchronous generator. According to the best second order parameter rule, the …
Flexibility of variable-speed pumped-storage unit during primary ...
The variable-speed pumped-storage unit (VSPSU) based on doubly-fed induction machine (DFIM) and reversible pump-turbine (RPT) is a new type of pumped-storage unit with the advantages of large capacity (up to 400 MW for a single unit [6]), high efficiency (typical overall efficiency of 70–85 % [4]), and quick response (power step …
Design of type-2 fuzzy fractional-order proportional-integral-derivative controller and multi-objective parameter …
For an actual pumped storage power station, the parameters value of the PSURS model is calculated according to the physical parameters of the unit. The key parameters of the PSURS: T y B = 0.05, T y = 0.3, f = 0.75, T r = 1.0, T a = 8.503 .
Stability and safety study of pumped storage units based on time ...
Stability and safety study of pumped storage units based on time-shifted multi-scale cosine similarity entropy ... Parameter settings are consistent with the descriptions mentioned in Section 3.1, and the ... This study focuses on the vibration signals of pumped storage units and introduces a novel method for feature extraction and state …
Research on Control Parameter Setting Method of AC Excitation …
This work focuses on the converter control links of variable speed pumped storage unit, proposed the principle of dynamic correction for AC excitation system of variable speed pumped storage unit, based on the dynamic correction method widely used in …
Multi-objective optimization of the closure law of guide vanes for ...
Variable-speed pumped-storage unit (VSPSU) is state-of-the-art technology and has appeared as a new orientation of the world pumped-storage industry in recent years, but the dynamic performance of ...
A parameter adaptive identification method for a pumped storage …
A parameter adaptive identification method together with an improved gravitational search algorithm (IGSA) is proposed and applied to solve the identification problem for a PSHURS under the no-load condition and shows that the adaptive parameter identification method along with the IGSA perform best for all identification indicators. …
Rotor short-circuited start-up strategy for a doubly fed induction ...
The starting time of a large-rated variable-speed pumped storage unit (PSU) operating in pumping mode is crucial in the power balancing scenario in a modern power system because it establishes the transition period from generation to pumping modes, and vice versa, which determines the power system stability. Doubly fed induction …
A parameter adaptive identification method for a pumped storage …
Request PDF | A parameter adaptive identification method for a pumped storage hydro unit regulation system model using an improved gravitational search algorithm | With increasing wind farm, solar ...
Performance enhancement of pumped storage units for system …
Here, A 0 ∼ A 6 and B 0 ∼ B 7 are depicted in Appendix B. The characteristic parameters of pumped turbine are interpolated from the running point on the characteristic curves. The physical significance of D G is the additional damping torque provided by the PSU against the change of rotational speed, which is of positive …
Fractional-PID and Its Parameter Optimization for Pumped …
In this study, a state-space equation mathematical model of the pumped storage governing system considering the complex hydraulic pipeline structure of the …
Parameters-setting method for synchronization of pumped …
The parameters-setting method in this paper provides the theoretical foundation for synchronizing parameters setting of pumped storage unit. It is significant …
Flexibility of variable-speed pumped-storage unit during primary frequency control and corresponding assessment method …
According to (5), (6), the constraints on I s and I r are actually comprehensive constraints on VSPSU''s power and speed. Based on the parameters of a 250 MW VSPSU in [31], the power range specified by I s and I r limits is shown in Fig. 3, where as ω r varies in a typical range of ± 10 %, the maximum P range varies …
A predictive governing control method of the pumped-storage unit based on lumped-parameter …
Focused on the hydraulic–mechanical coupled transient behaviors of the pumped-storage unit (PSU), this paper discusses the theoretical implementation and the parameter optimization of tilt ...
Stability and safety study of pumped storage units based on time …
In conventional fault diagnosis methods, various physical parameters and mathematical models are typically employed to characterize the operational status of pumped storage units, such as vibration data, sound …
Research on control strategy of full‐size converter‐based variable speed pumped storage unit in power generation condition …
This paper introduces two control methods of full-size converter-based variable speed pumped storage units in power generation condition, namely the power priority control method and speed priority c...
A predictive governing control method of the pumped-storage unit based on lumped-parameter …
The speed governor is known as one of the most important control parts in the pumped-storage unit (PSU). When operating in transient processes, the stability of the PSU''s hydraulic and mechanical states maintains …
Research on control strategy of full‐size converter‐based variable speed pumped storage unit in power generation condition …
In this paper, the mathematical models of each part of the direct-drive variable speed pumped storage unit are established, including the model of the pump turbine and its regulating system, the model of direct-drive motor, and its excitation control system. Then we ...
Parameter optimization decision framework for transient process …
1. Introduction1.1. Background and motivation. At present, China is in a critical period of energy transformation [1].With the large-scale integration of new energy sources such as wind and solar [2], the demand for high-flexible power systems is becoming more urgent [3].Pumped Storage Hydropower System (PSHS) has the advantages of a …
Parameter uncertainty and sensitivity of pumped storage system …
This paper investigates the parameter uncertainty and sensitivity of pumped storage system with surge tank (PSSST) under grid-connected operating condition (GCOC). Firstly, the nonlinear model of PSSST under GCOC is …
Liying Wang, Luyao Zhang, Weiguo Zhao * and Xiyuan Liu
proposed for the parameter identification of the governing system in a pumped storage unit. The algorithm integrates two key strategies to improve the optimization ability of the algorithm.
Research on control strategy of full
In this paper, the mathematical models of each part of the direct-drive variable speed pumped storage unit are established, including the model of the pump turbine and its regulating system, the model of …
Research on self‐starting strategy of variable speed pumped storage ...
This study focuses on the self-starting strategy of variable speed pumped storage units (VSPSU) by shorting machine stator. ... this method is further studied in [16, 17], in which a self-starting and synchronisation strategy based on the stator flux orientation is proposed. Although the existing researches had verified the feasibility of …
Parameter optimization decision framework for transient process …
Pumped storage plants (PSPs) incorporate variable-speed units (VSUs) in parallel with fixed-speed units (FSUs) to balance investment and enhance system response flexibility. However, the parallel operation of FSU and VSU may lead to unfavorable hydraulic disturbance, posing a threat to transient stability of the units.
Parameter identification and uncertainty quantification …
1 INTRODUCTION. Pumped storage units (PSUs) are important energy storage technologies that can effectively alleviate the impact of intermittent fluctuating energy sources such as wind and solar …
2. Hydraulic-Mechanical-Electrical Coupling Model
The pumped storage unit regulation system (PSURS) has strong nonlinear and time-varying characteristics ... Malik and Zeng proposed a method for parameter optimization of PID governor of hydraulic turbine generator set based on the algorithm of bacteria-particle swarm optimization ... Under the same parameter setting, …
Modelling and control of doubly fed variable‐speed pumped storage units ...
The doubly fed pumped storage can be an effective method to control the power of the power grid and restrain the power grid fluctuation caused by renewable energy generation. First, this study introduces the structure of doubly fed pumped storage unit, and analyses the mathematical model of reversible hydraulic pump turbine, doubly …
A predictive governing control method of the pumped-storage unit …
A predictive governing control method of the pumped-storage unit based on lumped-parameter model equivalence. ... the simulation experiment of governing movements during turbine start-up process is conducted under a nonlinear lumped-parameter numerical simulation platform of PSU by comparative case studies, the overall …
Parameter settings of the two controllers | Download Scientific …
Download scientific diagram | Parameter settings of the two controllers from publication: A predictive governing control method of the pumped-storage unit based on lumped-parameter model ...
Research on Simplified Tuning of PSS Parameters of Pumped …
Based on the symmetry difference of the angular stability analysis, it is concluded that the PSS parameters of the pumped-storage unit can be simplified under the two working …
Design of type-2 fuzzy fractional-order proportional-integral-derivative controller and multi-objective parameter …
Analyzes the influence of head and load on the stability of unit under load reduction. • Design of type-2 fuzzy fractional order proportion integration differentiation controller. Pumped storage unit (PSU) is an effective regulation tool …