Power grid frequency flexible operation system and method using the same
First Claim
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1. A power grid frequency flexible operation system, comprising:
- a generating unit which includes a base-load unit and a peak-load unit and generates first alternating current (AC) power;
a high-voltage direct current (HVDC) transmission unit which receives the first alternating current (AC) power generated by the generating unit and transmits second alternating current (AC) power;
a first load; and
a second load,wherein the high-voltage direct current (HVDC) transmission unit comprises;
a converter which transforms the first alternating current (AC) power generated by the generating unit to direct current (DC) power;
an inverter which is connected to the converter and transforms the direct current (DC) power to the second alternating current (AC) power,wherein a frequency of the first alternating current (AC) power has a first frequency variation allowance range,wherein a frequency of the second alternating current (AC) power has a second frequency variation allowance range,wherein the first frequency variation allowance range of the frequency of the first alternating current (AC) power generated by the generating unit is larger than the second frequency variation allowance range of the frequency of the second alternating current (AC) power,wherein the second load requires a power having a higher quality than a quality of a power required by the first load,wherein the first load is supplied with the first alternating current (AC) power having the first frequency variation allowance range larger than the second frequency variation allowance range,wherein the second load is supplied with the second alternating current (AC) power having the second frequency variation allowance range, andwherein the first frequency variation allowance range of the first alternating current (AC) power is from −
0.5 Hz to +0.5 Hz on a 60 Hz standard, and the second frequency variation allowance range of the second alternating current (AC) power is from −
0.2 Hz to +0.2 Hz on the 60 Hz standard.
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Abstract
A power grid frequency flexible operation system is provided. The system comprises a generating unit, which includes a base-load unit and a peak-load unit; a high voltage direct-current (HVDC) transmission unit, which transmits the power generated in the generating unit as direct current (DC) power; and a load, which is supplied with the power generated by the generating unit; wherein the high-voltage direct current (HVDC) transmission unit comprises a converter, which transforms to direct current (DC) power, alternating current (AC) power generated in the generating unit and having a first frequency variation allowance range; an inverter, which is connected to the converter and transforms the direct current (DC) power to alternating current (AC) power having a second frequency variation allowance range, wherein the first frequency variation allowance range is larger than the second frequency variation allowance range.
6 Citations
6 Claims
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1. A power grid frequency flexible operation system, comprising:
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a generating unit which includes a base-load unit and a peak-load unit and generates first alternating current (AC) power; a high-voltage direct current (HVDC) transmission unit which receives the first alternating current (AC) power generated by the generating unit and transmits second alternating current (AC) power; a first load; and a second load, wherein the high-voltage direct current (HVDC) transmission unit comprises; a converter which transforms the first alternating current (AC) power generated by the generating unit to direct current (DC) power; an inverter which is connected to the converter and transforms the direct current (DC) power to the second alternating current (AC) power, wherein a frequency of the first alternating current (AC) power has a first frequency variation allowance range, wherein a frequency of the second alternating current (AC) power has a second frequency variation allowance range, wherein the first frequency variation allowance range of the frequency of the first alternating current (AC) power generated by the generating unit is larger than the second frequency variation allowance range of the frequency of the second alternating current (AC) power, wherein the second load requires a power having a higher quality than a quality of a power required by the first load, wherein the first load is supplied with the first alternating current (AC) power having the first frequency variation allowance range larger than the second frequency variation allowance range, wherein the second load is supplied with the second alternating current (AC) power having the second frequency variation allowance range, and wherein the first frequency variation allowance range of the first alternating current (AC) power is from −
0.5 Hz to +0.5 Hz on a 60 Hz standard, and the second frequency variation allowance range of the second alternating current (AC) power is from −
0.2 Hz to +0.2 Hz on the 60 Hz standard. - View Dependent Claims (2, 3, 4, 5)
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6. A power grid frequency flexible operation method comprising:
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supplying, to a first load, first alternating current (AC) power generated by a generating unit, wherein a frequency of the first alternating current (AC) power generated by the generating unit has a first frequency variation allowance range; transforming the first alternating current (AC) power having the first frequency variation allowance range and generated by the generating unit to second alternating current (AC) power, wherein a frequency of the second alternating current (AC) power has a second frequency variation allowance range, and the transforming comprises transforming the first alternating current (AC) power having the first frequency variation allowance range to direct current (DC) power and transforming the direct current (DC) power to the second alternating current (AC) power having the second frequency variation allowance range; and supplying, to a second load, the second alternating current (AC) power having the second frequency variation allowance range, wherein the first frequency variation allowance range of the frequency of the first alternating current (AC) power generated by the generating unit is larger than the second frequency variation allowance range of the frequency of the second alternating current (AC) power supplied to the second load, wherein the second load requires a power having a higher quality than a quality of a power required by the first load, and wherein the first frequency variation allowance range of the first alternating current (AC) power is from −
0.5 Hz to +0.5 Hz on a 60 Hz standard, and the second frequency variation allowance range of the second alternating current (AC) power is from −
0.2 Hz to +0.2 Hz on the 60 Hz standard.
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Specification
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Current AssigneeKorea University Research and Business Foundation
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Original AssigneeKorea University Research and Business Foundation
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InventorsJang, Gilsoo, Cho, Yunsung, Suh, Jaewan
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Primary Examiner(s)Tran, Nguyen
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Application NumberUS14/794,491Publication NumberTime in Patent Office1,210 DaysField of Search363 34- 36, 363 37US Class CurrentCPC Class CodesH02J 3/36 Arrangements for transfer o...H02M 5/44 using discharge tubes or se...H02M 7/7575 for high voltage direct tra...Y02E 60/60 Arrangements for transfer o...
