Method and system for start and operation of an electrically driven load
First Claim
1. A method for starting and operating an electrically driven load by power supply from a mechanical driver, the method comprising:
- the load mechanically connected to a first electrical machine in a power range of 10 MW and above;
said mechanical driver mechanically connected to a second electrical machine;
electrically interconnecting the first electrical machine to the second electrical machine at a standstill or when at least one of the first machine and the second machine have low speed, whereby the connection of the second electrical machine is dedicated to the first electrical machine;
in an acceleration phase, accelerating the first electrical machine by accelerating the second electrical machine with the mechanical driver; and
when the first electrical machine has reached a predefined rotational speed, synchronizing the first electrical machine with a local electrical power network and connecting it to the network.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and system for starting and operating an electrically driven load, e.g. a compressor or pump, by power supply from a mechanical driver, e.g. a turbine or combustion engine, whereby the load is mechanically connected to a first electrical machine, and the mechanical driver is mechanically connected to a second electrical machine. The first electrical machine is electrically interconnected to the second electrical machine at a standstill or when the first and or second machine have low speed. In an acceleration phase, the first electrical machine is accelerated by accelerating the second electrical machine with the mechanical driver. When the first electrical machine has reached a predefined rotational speed, the first machine is synchronized with a local electrical power network and connected it to that network.
16 Citations
17 Claims
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1. A method for starting and operating an electrically driven load by power supply from a mechanical driver, the method comprising:
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the load mechanically connected to a first electrical machine in a power range of 10 MW and above; said mechanical driver mechanically connected to a second electrical machine; electrically interconnecting the first electrical machine to the second electrical machine at a standstill or when at least one of the first machine and the second machine have low speed, whereby the connection of the second electrical machine is dedicated to the first electrical machine; in an acceleration phase, accelerating the first electrical machine by accelerating the second electrical machine with the mechanical driver; and when the first electrical machine has reached a predefined rotational speed, synchronizing the first electrical machine with a local electrical power network and connecting it to the network. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of starting and operating an electrically driven subsea load by power supply from a mechanical driver comprising:
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the subsea load mechanically connected to a first electrical machine; the mechanical driver mechanically connected to a second electrical machine; electrically interconnecting the first electrical machine to the second electrical machine at a standstill or when at least one of the first machine and the second machine have low speed, whereby the connection of the second electrical machine is dedicated to the first electrical machine; in an acceleration phase, accelerating the first electrical machine by accelerating the second electrical machine with the mechanical driver; and when the first electrical machine has reached a predefined rotational speed, synchronizing it with a local electrical power network and connecting it to the network.
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9. A start and operation system for the starting and operating of at least one mechanical load;
- the system comprising;
the load connected to and driven by at least one first electrical machine in a power range of 10 MW and above; power to the first electrical machine is provided with a mechanical driver which is mechanically connected to a second electrical machine functioning as a generator; the second electrical machine adapted to be electrically connected to said first electrical machine or a plurality of first electrical machines, whereby the system is adapted to accelerate said first electrical machine(s) by controlled delivery of power from the second electrical machine to the first electrical machine. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- the system comprising;
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17. A start and operation system for the starting and operating of at least one mechanical subsea load, the system comprising:
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the subsea load connected to and driven by at least one first electrical machine; power to the first electrical machine provided with a mechanical driver which is mechanically connected to a second electrical machine functioning as a generator; the second electrical machine adapted to be electrically connected to said first electrical machine or a plurality of first electrical machines, whereby the system is adapted to accelerate said first electrical machine(s) by controlled delivery of power from the second electrical machine to the first electrical machine.
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Specification