Abstract Hydraulic impedance, as an efficient frequency-domain analysis alternative, has been widely utilized in hydraulic transient for decades. Since the mathematical expressions of systems with complicated pipe networks are usually rather complex, it is difficult traditional continuous impedance method to obtain analytical solutions system’s frequency responses directly. Therefore, equivalen...

The aim of this study was to develop a real-time dynamic simulator of a power grid with power plant and battery model. The simulator was used to investigate the frequency control characteristics of a megawatt-scale high-capacity energy storage system connected to the electric power grid. In this study, a lithium-ion secondary battery was chosen as one of the batteries for a grid-connected model...

Pumped storage power plants face many challenges in competing the electricity market, and high pumping costs lead to prices for their generation, which is one of important factors that has limited development. To address this problem, paper studies pumped two-part tariff mechanism considering wind accommodation uses peak-valley price difference realize rationality economy a charging discharging...

Transport of suspended sediment between the two reservoirs of a pumped-storage plant in Switzerland was monitored over an 8-month period. A turbidity probe was installed on the upstream end of the pressure shaft, in which real-time monitoring was ensured by automatic data acquisition and remote control. The suspended sediment concentration in the reservoirs varies considerably over the course o...

The combination of distributed generation and energy storage technology has become a mainstream operation mode to ensure reliable power supply when is connected the grid. This paper first introduces two typical technologies: pumped battery storage. Then, it technologies represented by “ubiquitous Internet things” in new stage industry, such as virtual plant, smart micro grid electric vehicle. F...