A standalone power plant equipped with a concentrated solar power unit integrated into a combined cycle gas turbine plant that also integrates a solar power unit.

The integration of a concentrating solar power unit with a CCGT plant, using thermal energy storage and a damping filter, addresses the challenges of PV fluctuations, enhancing system flexibility and reliability, and reducing thermal stress and costs in island configurations.

JP2026523213APending Publication Date: 2026-07-13NUOVO PIGNONE TECH SRL
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Patent Information

Application Number
JP2025575090
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-07-10
Filing Date
2024-07-09
Publication Date
2026-07-13

AI Technical Summary

Technical Problem

Integrating photovoltaic (PV) systems with combined cycle gas turbines (CCGT) in an island configuration faces technical complexity due to mechanical impacts from PV fluctuations, thermal stress on the heat recovery steam generator (HRSG), and energy losses during peak solar radiation, which have hindered effective hybridization.

Method used

A power generation system integrating a concentrating solar power (CSP) unit with a CCGT plant, incorporating thermal energy storage (TES) and optional electric heater, and a damping filter to stabilize PV output, reduces thermal stress and energy losses by converting excess PV power into heat, thereby enhancing system flexibility and reliability.

Benefits of technology

The system achieves reduced thermal stress on HRSG, minimizes maintenance, and increases efficiency by stabilizing GT output, allowing for significant PV infiltration with lower investment and operating costs, while reducing carbon emissions and fuel consumption.

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Abstract

A stand-alone power plant with high solar-based renewable integration is disclosed. The power plant includes a combined cycle gas turbine plant and at least one power unit connected to a photovoltaic unit, the concentrated photovoltaic unit being integrated into the combined cycle gas turbine plant. A heat storage unit is also part of the power plant to collect heat from the CSP and optionally from the PV unit and supply heat to a second thermodynamic cycle. Methods for operating the power plant by minimizing, and even eliminating, both long-term and short-term fluctuations are also disclosed.
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