Pumped-storage power generation control device and pumped-storage power generation control method

Patent metadata

Field	Value
Publication number	US-10458384-B2
Application number	US-201615153022-A
Country	US
Kind code	B2
Filing date	May 12, 2016
Priority date	Mar 10, 2016
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

According to one embodiment, a pumped-storage power generation control device includes a control section that controls at least one of the pumping input of the pumped-storage power generation facility in the pumping operation and the power output of the pumped-storage power generation facility in the power generating operation such that a value, which is obtained by a predetermined calculation using the measurement value relating to the pumping input of the pumped-storage power generation facility in the pumping operation and the measurement value relating to the power output of the pumped-storage power generation facility in the power generating operation, becomes a set target value.

First claim

The invention claimed is:

1. A pumped-storage power generation control device comprising:
a first measuring unit that measures a pumping input or an electrical quantity corresponding to the pumping input of a pumped-storage power generation facility in a pumping operation;
a second measuring unit that measures a power output or an electrical quantity corresponding to the power output of a pumped-storage power generation facility in a power generating operation;
a control section that controls at least one of the pumping input of the pumped-storage power generation facility in the pumping operation and the power output of the pumped-storage power generation facility in the power generating operation such that a value, which is obtained by a predetermined calculation using the measurement value measured by the first measuring unit and the measurement value measured by the second measuring unit, becomes a set target value; and
wherein the control section controls at least one of the pumping input of the pumped-storage power generation facility in the pumping operation and the power output of the pumped-storage power generation facility in the power generating operation such that an addition, a difference, or a ratio between the power output of the pumped-storage power generation facility in the power generating operation and the pumping input of the pumped-storage power generation facility in the pumping operation becomes a set target value.

2. The pumped-storage power generation control device according to claim 1 ,
wherein the control section controls at least one of the pumping input of the pumped-storage power generation facility in the pumping operation and the power output of the pumped-storage power generation facility in the power generating operation such that a value, which is obtained by subtracting an absolute value of the pumping input of the pumped-storage power generation facility in the pumping operation from an absolute value of the power output of the pumped-storage power generation facility in the power generating operation or a ratio between the absolute value of the power output and the absolute value of the pumping input, becomes a set target value.

3. The pumped-storage power generation control device according to claim 2 ,
wherein the control section is capable of changing the target value from a positive value to a negative value or from a negative value to a positive value.

4. The pumped-storage power generation control device according to claim 1 , further comprising:
an input/output correcting unit that is provided with a frequency measuring unit which measures a frequency of an electric power system and a reference frequency setting unit which sets a reference frequency, wherein the input/output correcting unit corrects the target value or at least one of the pumping input of the pumped-storage power generation facility in the pumping operation and the power output of the pumped-storage power generation facility in the power generating operation in accordance with a value which is obtained by a calculation using the frequency measured by the frequency measuring unit and the reference frequency set by the reference frequency setting unit.

5. The pumped-storage power generation control device according to claim 1 , further comprising:
a power output variation estimating unit that estimates a variation of the power output of the pumped-storage power generation facility in the power generating operation based on the measurement value measured by the second measuring unit; and
an input/output correcting unit that corrects the target value or at least one of the pumping input of the pumped-storage power generation facility in the pumping operation and the power output of the pumped-storage power generation facility in the power generating operation in accordance with a variation in the power output estimated by the power output variation estimating unit.

6. The pumped-storage power generation control device according to claim 1 , further comprising:
an upper-dam water-level detecting unit that detects a water level of an upper dam, the upper dam being used by the pumped-storage power generation facility in the pumping operation and the pumped-storage power generation facility in the power generating operation; and
an input/output correcting unit that, in a case where the water level of the upper dam detected by the upper-dam water-level detecting unit is equal to or exceeds a certain level, corrects the target value or at least one of the pumping input and power output such that an absolute value of the power output of the pumped-storage power generation facility in the power generating operation becomes equal to or exceeds an absolute value of the pumping input of the pumped-storage power generation facility in the pumping operation.

7. The pumped-storage power generation control device according to claim 1 , further comprising:
an upper-dam water-level detecting unit that detects a water level of an upper dam, the upper dam being used by the pumped-storage power generation facility in the pumping operation and the pumped-storage power generation facility in the power generating operation; and
an input/output correcting unit that, in a case where the water level of the upper dam detected by the upper-dam water-level detecting unit is equal to or less than a certain level, corrects the target value or at least one of the pumping input and power output such that an absolute value of the power output of the pumped-storage power generation facility in the power generating operation becomes equal to or less than an absolute value of the pumping input of the pumped-storage power generation facility in the pumping operation.

8. The pumped-storage power generation control device according to claim 1 , further comprising:
a lower-dam water-level detecting unit that detects a water level of a lower dam, the lower dam being used by the pumped-storage power generation facility in the pumping operation and the pumped-storage power generation facility in the power generating operation; and
an input/output correcting unit that, in a case where the water level of the lower dam detected by the lower-dam water-level detecting unit is equal to or exceeds a certain level, corrects the target value or at least one of the pumping input and power output such that an absolute value of the pumping input of the pumped-storage power generation facility in the pumping operation becomes equal to or exceeds an absolute value of the power output of the pumped-storage power generation facility in the power generating operation.

9. The pumped-storage power generation control device according to claim 1 , further comprising:
a lower-dam water-level detecting unit that detects a water level of a lower dam, the lower dam being used by the pumped-storage power generation facility in the pumping operation and the pumped-storage power generation facility in the power generating operation; and
an input/output correcting unit that, in a case where the water level of the lower dam detected by the lower-dam water-level detecting unit is equal to or less than a certain level, corrects the target value or at least one of the pumping input and power output such that an absolute value of the pumping input of the pumped-storage power generation facility in the pumping operation becomes equal to or less than an absolute value of the power output of the pumped-storage power generation facility in the power generating operation.

10. The pumped-storage power generation control device according to claim 1 ,
wherein the pumped-storage power generation facility in the pumping operation is a variable speed pumped-storage power generation fa

Assignees

• Toshiba Kk

Inventors

• Mori Junji
• Suzuki Toshiaki
• Kusunoki Kiyoshi
• Kubo Toru
• Iida Shoji
• Kageyama Takahisa

Classifications

• Y02P90/50

  Energy storage in industry with an added climate change mitigation effect · CPC title

• F03B15/00

  Controlling (controlling in general G05 {; regulation of plants characterised by the use of siphons F03B13/086}) · CPC title

• H02J15/10

  using storage of hydraulic energy · CPC title

• H02K7/1823

  structurally associated with turbines or similar engines · CPC title

• F03B13/06 Primary

  Stations or aggregates of water-storage type, {e.g. comprising a turbine and a pump}(turbines characterised by having means for functioning alternatively as pumps F03B3/10) · CPC title