Title:
VARIABLE SPEED PUMPED-STORAGE HYDROELECTRIC GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/109921
Kind Code:
A1
Abstract:
A variable speed pumped-storage hydroelectric generation device of the present invention is provided with: a variable speed hydroelectric generator motor which, in spite of being equipped with a frequency converter and having a rotor rotating at variable speeds, has a primary side synchronously connected to a commercial power system; and a pump turbine directly connected to the rotor of the variable speed hydroelectric generator motor to drive the same in a power generation mode or be driven by the same in a pumped-storage mode . When a slip frequency is within a normal operating range, the maximum change rate of a power output command is made constant. When the slip frequency is within a range lower than a lower limit value of the normal operating range by not more than a predetermined value, or within a range greater than an upper limit value of the normal operating range by not more than the predetermined value, the maximum change rate of the power output command is limited by being multiplied by a value in a range of 1 to 0 . When the slip frequency is within a range lower than the lower limit value by more than the predetermined value, or within a range greater than the upper limit value by more than the predetermined value, the maximum change rate of the power output command is limited by being multiplied by zero .
Inventors:
YOSHIDA MASAHIRO (JP)
Application Number:
PCT/JP2015/086131
Publication Date:
June 29, 2017
Filing Date:
December 24, 2015
Export Citation:
Assignee:
HITACHI MITSUBISHI HYDRO CORPORATION (JP)
International Classes:
H02P9/04; F03B15/04; H02P9/00; H02P23/00
Foreign References:
| JP2012016242A | 2012-01-19 | |||
| JP2013078196A | 2013-04-25 | |||
| CN102646138A | 2012-08-22 | |||
| US4344027A | 1982-08-10 |
Other References:
See also references of EP 3396847A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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