Power system monitoring apparatus, power system control apparatus, and power system monitoring method

Patent metadata

Field	Value
Publication number	US-2016359363-A1
Application number	US-201415116524-A
Country	US
Kind code	A1
Filing date	Sep 19, 2014
Priority date	Feb 28, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

In administration based on the existing (N−1) reliability criteria, an appropriate administration plan may be not drafted in a power system in which renewable energy increases. Accordingly, according to the invention, a power system monitoring apparatus that monitors a power system includes: an input unit that inputs assumable system breakdown data including an occurrence frequency of each assumable breakdown of the power system and assumable output change data including an occurrence frequency of each assumable output change of each generator connected to the power system; and an output unit that generates conditions by which events of the assumable breakdowns and the assumable output changes are combined based on the occurrence frequencies of the assumable breakdown and the assumable output change and outputs a control plan for each of the conditions.

First claim

1 . A power system monitoring apparatus that monitors a power system, the apparatus comprising:
an input unit that inputs assumable system breakdown data including an occurrence frequency of each assumable breakdown of the power system and assumable output change data including an occurrence frequency of each assumable output change of each generator connected to the power system; and an output unit that generates conditions by which events of the assumable breakdowns and the assumable output changes are combined based on the occurrence frequencies of the assumable breakdown and the assumable output change and outputs a control plan for each of the conditions.

2 . The power system monitoring apparatus according to claim 1 ,
wherein the output unit simulates whether an internal phase difference angle of the generator and a voltage of a predetermined node in the power system converge within a predetermined range under the condition and changes the control plan based on a result of the simulation.

3 . The power system monitoring apparatus according to claim 1 ,
wherein the output unit displays the control plan of each of the conditions by a correlation between the occurrence frequency and a control amount.

4 . The power system monitoring apparatus according to claim 1 ,
wherein the assumable system breakdown data includes spot information of the assumable breakdown, the assumable output change data includes spot information of the assumable output change, and the condition is generated based on the spot information.

5 . The power system monitoring apparatus according to claim 4 ,
wherein the condition is weighted between the events of the assumable output change based on the spot information.

6 . The power system monitoring apparatus according to claim 1 ,
wherein the condition is generated by combinations of the events of the assumable breakdowns and the assumable output changes in which the occurrence frequencies are within a predetermined range.

7 . The power system monitoring apparatus according to claim 1 ,
wherein the assumable system breakdown data includes data of a breakdown phase according to a breakdown occurrence spot.

8 . The power system monitoring apparatus according to claim 1 ,
wherein the assumable output change data includes data of an output change phase of each generator.

9 . The power system monitoring apparatus according to claim 8 ,
wherein the data of the output change phase includes an output change amount and an output change speed.

10 . The power system monitoring apparatus according to claim 8 ,
wherein the data of the output change phase includes a cutout event of wind power generation.

11 . The power system monitoring apparatus according to claim 1 ,
wherein a preliminarily set control policy of each generator is further input to the input unit and the control plan is generated by the output unit.

12 . A power system control apparatus that performs a control instruction to the generator based on the control plan output from the power system monitoring apparatus according to claim 1 .

13 . A power system monitoring method of monitoring a power system, the method comprising:
inputting assumable system breakdown data including an occurrence frequency of each assumable breakdown of the power system and assumable output change data including an occurrence frequency of each assumable output change of each generator connected to the power system; and generating conditions by which events of the assumable breakdowns and the assumable output changes are combined based on the occurrence frequencies of the assumable breakdown and the assumable output change and outputting a control plan for each of the conditions.

Assignees

• Hitachi Ltd

Inventors

• Sato Yasuo
• Yatsu Masahiro
• Hara Kouichi
• Kuroda Eisuke
• Tomobe Osamu
• Yamazaki Jun

Classifications

• H02J13/12 Primary

  Monitoring network conditions, e.g. electrical magnitudes or operational status · CPC title

• Y04S10/30

  State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge · CPC title

• G05B17/02

  electric · CPC title

• H02J3/46

  Controlling the sharing of generated power between the generators, sources or networks · CPC title

• H02J3/382

  Electricity · mapped topic