What is Pondage and storage?

What is Pondage and storage?

Pondage usually refers to the comparably small water storage behind the weir of a run-of-the-river hydroelectric power plant. Such a power plant has considerably less storage than the reservoirs of large dams and conventional hydroelectric stations which can store water for long periods such as a dry season or year.

How does pumping storage work?

Like every other hydroelectric plant, a pumped-storage plant generates electricity by allowing water to fall through a turbine generator. But unlike conventional hydroelectric plants, once the pumped-storage plant generates electricity, it can then pump that water from its lower reservoir back to the upper reservoir.

How does run of river facilities work?

Run-of-river Hydropower It harvests energy from flowing water through a canal or penstock in the absence of a large dam and reservoir. A portion of the water from the upper reaches of a river is diverted into a pipeline through an intake weir.

How is hydropower stored?

Storage hydropower plants include a dam and a reservoir to impound water, which is stored and released later when needed. Water stored in reservoirs provides flexibility to generate electricity on demand and reduces dependence on the variability of inflow.

What is run off river plant?

Run off river plant is small plant capable of generating small power in kW. In this plant turbine is move through running water in lake i.e. no need of water storage in head. Head of this plant is small and is in few meters. In this paper accurate modeling of runoff river plant is presented.

What pumped storage?

Pumped storage hydropower (PSH) is a type of hydroelectric energy storage. It is a configuration of two water reservoirs at different elevations that can generate power as water moves down from one to the other (discharge), passing through a turbine.

What are the advantages of pumped storage?

The advantages of pumped storage plants: High economical value: Pumped storage plants work at an efficiency level of up to 82 percent. Water resource management and flood control. Exceptional lifetime of more than 80 years. Hybrid concepts: Combining pumped storage and wind or solar.

What is run off river plant with pondage?

Run-of-the-river power plants may have no water storage at all or a limited amount of storage, in which case the storage reservoir is referred to as pondage. A plant without pondage is subject to seasonal river flows, thus the plant will operate as an intermittent energy source.

What is the difference between a run of the river system and a storage system?

Run-of-river provides a continuous supply of electricity (base load), with some flexibility of operation for daily fluctuations in demand through water flow that is regulated by the facility. Storage hydropower: typically a large system that uses a dam to store water in a reservoir.

What is storage plant?

A pumped storage plant is an electricity storage device in which surplus electricity is absorbed and stored for later use. It operates in a similar way to a large battery, although the electricity is stored as mechanical rather than electro-chemical energy.

How current is stored?

Static electricity can be stored in a Leyden jar, Direct current (DC) electricity can be stored in a capacitor and a rechargeable battery. Unfortunately, there is no way to store alternating current (AC) electricity, although it can be obtained from stored DC power.

What is the difference between forebay and surge tank?

It is nothing but regulating reservoir. Forebay stores the rejected water as the load on the turbine decreases & supplies water immediately when load on turbine increases i.e. it is nothing but surge tank for small capacity hydro power station.

How do you size a forebay?

The sediment forebay should be sized to hold 0.25 inches of runoff per impervious acre of contributing drainage area, with an absolute minimum of 0.1 inches per impervious acre.

What is the difference between a run-of-the-river system and a storage system?

Why is pumped storage useful?

The most important use for pumped storage has traditionally been to balance baseload powerplants, but may also be used to abate the fluctuating output of intermittent energy sources. Pumped storage provides a load at times of high electricity output and low electricity demand, enabling additional system peak capacity.

Can be with or without pondage?

Which type of hydro power plant can be with or without pondage? Explanation: Run-off river power plants can be with or without pondage. A runoff river plant without pondage has no control over river flow and uses water as it comes. The runoff river plant with pondage may supply base load power.

What is storage type hydropower plant?

What is Pondage in power plant?

The pondage may be defined as a regulating body of water in the form of a relatively small pond or reservoir provided at the plant. The pondage is used to regulate the variable water flow to meet power demand.

How do you build a pondage?

This is achieved by constructing a dam across the stream at a suitable site and building a storage reservoir on the upstream side of the dam. The pondage may be defined as a regulating body of water in the form of a relatively small pond or reservoir provided at the plant.

How does Pondage increase the capacity of a river?

Pondage increases the capacity of a river over a short time, such as a week. Storage, however, increases the capacity of a river over an extended period of 6 months to as much as 2 years. Following factors should be considered while selecting the site for hydro-power plant :

How is water supplied to the power house from the pond?

The water from head water pond is supplied to the power house through the penstock, where turbines are rotated for power generation. From the turbine, the water is discharged into the tailrace pond. The water stored in the tailrace pond is pumped back to the head reservoir with the help of the pump during low load periods.