Abstract
The need to enhance flexibility on current power plant is linked to the strong penetration of non-dispatchable sources in the current energy network, which causes a dramatic need for ancillary services to sustain the grid operability. A framework including a micro Gas Turbine (mGT), a Heat Pump (HP) and a PCM Storage is considered to enhance plant flexibility while facing grid and price fluctuations during day operations. The system so composed is devoted to electrical energy production only. A proper use of the HP allows, for instance, to heat up the compressor intake temperature whilst the system is operating at minimum load. The system can then produce a lower amount of energy in order to be more competitive in the infra-day energy market. At the same time, the cold storage is charged and the stored energy can be later used to power up the system during the peak hours by cooling the compressor intake. This work presents then the installation of the control system devoted to the management and the control of such complex system. The test-bed is defined to test different operating conditions and to validate the operating framework of the whole compound.
Highlights
The panorama of gas turbine combined cycle is going to come into a deep renovation and re-directed towards new operative scenarios as renewables are changing dramatically the production system
This paper focuses on the flexibility of combined power plants via a retrofitting of existing systems with a heat pump and coupling with advanced control system
When it comes to consider innovative control system for normal operating condition of combined cycle, these are rather hard to find in literature – where focused is placed on start-ups
Summary
The panorama of gas turbine combined cycle is going to come into a deep renovation and re-directed towards new operative scenarios as renewables are changing dramatically the production system. This paper focuses on the flexibility of combined power plants via a retrofitting of existing systems with a heat pump and coupling with advanced control system When it comes to consider innovative control system for normal operating condition of combined cycle, these are rather hard to find in literature – where focused is placed on start-ups. In this integrated layout is necessary to have a management system capable to decide with a 15 minutes resolution as well as 1 second resolution which will be the best configuration of the system, which is the usage of the heat pump and when it is better to charge/discharge the storage. This paper introduces the control system and it implementation in the environment
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