JP-2026076222-A - Integrated power production and storage system

JP2026076222AJP 2026076222 AJP2026076222 AJP 2026076222AJP-2026076222-A

Abstract

[Problem] To provide a combined cycle power plant that is integrated into a manufacturing or production facility for the production, use, and storage of hydrogen and oxygen. [Solution] In an integrated power production system, the power plant outputs power to the power grid system and comprises a hydrogen production system, a gas turbine combined cycle power plant including a gas turbine engine that generates a gas flow used to rotate a turbine shaft by burning hydrogen from the hydrogen production system, and a heat recovery steam generator (HRSG) that generates steam with the gas flow from the gas turbine engine to rotate a steam turbine, and a hydrogen storage system, and operates the hydrogen production system with power from the power grid when the power grid system has surplus energy, and balances the active and reactive loads on the power grid system using at least one of the hydrogen production system and the gas turbine combined cycle power plant. [Selection Diagram] None

Inventors

デイヴィッド・ハント
デイヴィッド・マクディード
マーク・ピーク
ピーター・ルエセン
ブライアン・アレン
ジャンフィス・サン－シール

Assignees

ミツビシパワーアメリカズインコーポレイテッド

Dates

Publication Date: 20260511
Application Date: 20260115
Priority Date: 20200901

Claims (20)

A power plant configured to output power to the power grid system, A hydrogen generation system configured to produce hydrogen, A gas turbine engine configured to burn hydrogen from the hydrogen production system to generate a gas flow usable to rotate a turbine shaft, and a heat recovery steam generator (HRSG) configured to generate steam with the gas flow from the gas turbine engine to rotate a steam turbine. A gas turbine combined cycle power plant including, A storage system configured to store hydrogen produced by the hydrogen generation system, A power plant including a controller configured to operate the hydrogen generation system with power from the power grid system when the power grid system has surplus energy, and to balance the active and reactive loads on the power grid system using at least one of the hydrogen generation system and the gas turbine combined cycle power plant.
The hydrogen generation system further includes a power conversion device that connects the hydrogen generation system to the power grid system, and the power conversion device is A DC converter for converting DC power from the hydrogen generation system into clean AC power for the power grid system, The power plant according to claim 1, further comprising an AC converter for converting AC power from the power transmission grid system into DC power for the hydrogen generation system.
The DC converter includes a chopper converter or a thyristor converter. The power plant according to claim 2, wherein the AC converter includes a power conversion system.
The gas turbine engine is connected to a gas turbine generator via a first clutch. The power plant according to claim 1, wherein the controller is configured to selectively activate the first clutch, thereby enabling the gas turbine generator to rotate freely and absorb reactive loads.
The steam turbine is connected to a steam turbine generator via a second clutch. The power plant according to claim 1, wherein the controller is configured to selectively activate the second clutch, thereby enabling the steam turbine generator to rotate freely and absorb the reactive load.
The power plant according to claim 1, further comprising a battery connected to the power grid system to provide load and frequency support.
The power plant according to claim 6, further comprising a renewable energy producer connected to the power grid system, wherein the battery can be charged from the renewable energy producer without the power grid system.
The power plant according to claim 1, further comprising an auxiliary burner configured to burn hydrogen from the hydrogen generation system in order to heat the hydrogen generation system.
The power plant according to claim 1, wherein the hydrogen generation system includes an electrolytic cell.
The power plant according to claim 9, further comprising a heat source for heating the electrolytic cell, wherein the heat source includes a resistance heater or a power conversion device.
The power plant according to claim 9, further comprising a heat exchange circuit connected to the electrolytic cell for cooling or heating the electrolytic cell.
The power plant according to claim 11, wherein the heat exchange circuit is connected to the gas turbine combined cycle power plant and supplied with steam.
The electrolytic cell is further configured to produce oxygen, The power plant according to claim 11, further comprising an oxygen storage system.
The power plant according to claim 13, wherein the heat exchange circuit is supplied with cooled oxygen from the electrolytic cell.
An oxygen turbine driven by oxygen from the electrolytic cell, The power plant according to claim 13, further comprising a generator driven by the oxygen turbine.
A conduit connecting the oxygen output of the electrolytic cell to the HRSG of the gas turbine combined cycle power plant, A nozzle connected to the inlet of the HRSG for injecting oxygen from the electrolytic cell at a high speed of 750 m/s or more, The power plant according to claim 9, further comprising:
The power plant according to claim 1, further comprising burning the hydrogen in the HRSG using an auxiliary combustion burner.
The power plant according to claim 1, further comprising a natural gas source connected to the gas turbine engine, wherein the gas turbine engine is configured to burn natural gas, hydrogen, and combinations thereof.
The power plant according to claim 1, wherein the hydrogen storage system includes an underground storage system comprising at least one of a rock salt cavity and a plurality of pipes.
A temporary support structure including a hoist configured to install a pipe in a groove, The power plant according to claim 19, further comprising a welding gantry that is operable using the temporary support structure for assembling sections of pipe.

Description

This specification generally, but not limited to, relates to combined cycle power plants used to generate electricity. More specifically, but not limited to, this application relates to the production, use, and storage of hydrogen and oxygen in combined cycle power plants that can be integrated into manufacturing or production facilities. The power grid is a mechanism for balancing the total energy demand of consumers using the combined energy supply of power-producing machines, including renewable energy sources and traditional power plants such as those that burn fossil fuels. Renewable energy sources can include energy resources that do not involve combustion or CO2 emissions. Typical renewable energy sources include hydropower, solar power, and wind power. Solar and wind power, in particular, are intermittent and unpredictable. A power plant can include means for generating electricity to meet demand using fuels such as fossil fuels or hydrogen derived from various resources. Fossil fuels can include coal, natural gas, or fuel oil. A typical power plant includes a gas turbine and generator, and often a steam turbine in a combined cycle configuration. Gas turbines and steam turbines can generate electricity from the mechanical energy converted from the combustion of fuel and the associated steam generation process. Electricity consumers include any user of electricity. Consumers can be residential, commercial, or industrial consumers. Consumers can use energy in various ways, thereby creating diverse demands on the power grid. Apparent power, actual power, and reactive power An electrical circuit consists of various types of power producers or "generators" and power consumers or "loads." A generator produces the power that flows to the load, and then returns to the generator to complete the circuit. An active load is a purely resistive load that converts power entirely into other forms of energy without generating a magnetic field; examples include heaters and incandescent light bulbs. A reactive load is a load that generates a magnetic field to convert power into other forms of energy, such as rotational mechanical force in an induction motor or sound in a speaker. When a reactive load is present in an electrical circuit, it appears that more power is supplied to the load by the generator ("apparent power") than the power consumed by the load ("actual power"), and due to the need to generate a magnetic field, there exists a difference in the alignment between voltage and current, known as phase alignment. In an AC circuit, apparent power (S) is the product of voltage (V) and current (I), given by the equation (S = VI). The amount of phase alignment between voltage and current is expressed as an angle (Φ), ranging from -90 degrees to +90 degrees. A phase angle Φ = zero indicates that the voltage and current are perfectly phase-aligned, and S = VI represents not only apparent power but also real power (P), so S = P = VI. This corresponds to a circuit that includes a full active load but does not include a reactive load. In a circuit with a reactive load, the voltage and current are out of phase due to the need to generate a magnetic field, and it appears that more power is supplied by the generator than is consumed by the load, where Φ represents the amount of alignment or phase angle between the voltage and current, and the real power is given by the equation P = VI cos(Φ). The difference between apparent power and real power is given by the relation S = ( P² + Q² ) ¹/² , where Q is defined as "reactive power". As a result, reactive power is the difference between apparent power and real power generated in the circuit, and reactive power is given by the relation Q = VI sin(Φ) and is measured in units known as Volt-Amp-Reactive or VAR. Reactive power can be generated within a generator by increasing or decreasing the voltage that generates the magnetic field ("excitation voltage"), or by controlling the amount of reactive load in a circuit, such as by turning reactive loads on or off to manage the VAR flow of the entire system. Failure to manage the balance between both active and reactive power flows can lead to fluctuations in both voltage and frequency within the power system, potentially damaging electrical equipment. An inverter is an electrical device that converts direct current (DC) power into alternating current (AC) power. A rectifier is an electrical device that converts alternating current (AC) power into direct current (DC) power. As mentioned above, various factors can have a significant impact on the stability of the power grid. Specifically, this includes (1) when large industrial consumers start (or stop) using large amounts of electricity, or (2) when there are significant fluctuations in electricity demand by residential and/or commercial consumers during seasonal fluctuations in demand, such as a) off-peak periods like nighttime and midday versus peak periods like morning and evening,