The Roleof Pumped Storage Power Plantsin the National Grid

 

Agenda

1.Key Figures of the European Energy Market

2 Key Figures of the Austrian Energy Market

3 Key Figures of VERBUND / Providing Services

4 Optimal Operation of VERBUND‘s Hydro Power Plants

5 Pumped Storage Power Plants –fields of application

 

3.Ancilliary Services

VERBUND provides

Balancing energy

Reactive power

Energy and Power in Emergency Situations

Black start capability

Congestion management capabilities (possibility for redispatch)

 

for the Austrian transmission system operator

 

3. Balancing Management in the UCTE3.Balancing Management in the UCTE

Every trader (retailer, commercial market participant) need a plan to cover his forecasted demand. At the end of the (day ahead) planning process his generation, trades and consumption must be in balance.

In the synchronous UCTE area the load frequency control balance the fluctuating demand.??The Transmission System Operators (TSO) are in charge of the load frequency control.

There are different components of the load-frequency control

Primary Control

Secondary Control

Tertiary Control

The TSOshave to procure the services for Primary Control, Secondary Control and Tertiary Control from generators (depending on the market system).

 

3.Primary Control3.Primary Control

Primary control is activated if the frequency deviation exceeds more than ±20mHz.

Primary control immediately restores the balance between generation and load. The system frequency is stabilized at a quasi-steady-state value different from the frequency set point value (50 Hz). (1)

All TSOsin the synchronous area (UCTE area) have to participate in Primary control (principle of solidarity) (2)??The total Primary Control Reserve in the synchronous UCTE area is 3000 MW.(1)Outage(2)Source: UCTE Operation Handbook

3.Secondary Control3.Secondary Control

Secondary Control maintains the-balance between generation and demand (consumption) within a specified area called control area as well as-the system frequency.

Secondary Control makes use of a centralized controller (Automatic Generation Control, AGC). The Secondary Controller is operated automatically, on-line and closed-loop.

Secondary control

balances the power deficit inside a control area

adjusts a frequency offset

makes primary control reserve fully available again

controls the sum of energy exchange of a control area.

3.TertiaryControl3.TertiaryControl

In case of a large unbalance Tertiary Control Reserve is required to restore and free up Secondary Control Reserves.

Tertiary Control is activated automatically or manually. Most TSOsactivate Tertiary Control manually.

Operation of Tertiary Control can be bound to the time frame of scheduling. Around 15 min after activation of Tertiary Control Tertiary Control Power restores the Secondary Control RangeOrder:+ 50 MWtime limits10min10minOrder:-50 MW50 MW100 MW≥15min≥15min50 15min