Apparatus monitoring system and apparatus monitoring method

• US 6,522,247 B2
• Filed: 05/22/2001
• Issued: 02/18/2003
• Est. Priority Date: 05/23/2000
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Uehara, Kyoichi, Akazaki, Masayuki, Maruyama, Shiro, Sakakibara, Takaaki
• Primary Examiner(s): Pope, Daryl
• Application Number:
  US09/861,725
• Publication Number:
  US 20010048375A1
• Time in Patent Office: 637 Days
• Field of Search: 340/506, 340/511, 340/517, 340/521, 340/531, 340/533, 340/679, 340/3.1, 340/825.36, 340/825.49, 375/222, 128/904
• US Class Current: 340/506
• CPC Class Codes: G05B 23/0237 based on parallel systems, e.g. comparing signals produced at the same time by same type systems and detect faulty ones by noticing differences among their responses
• CPC Class Codes: G05B 23/0272 Presentation of monitored results, e.g. selection of status reports to be displayed; Filtering information to the user
• CPC Class Codes: H01H 1/0015 Means for testing or for inspecting contacts, e.g. wear indicator measuring circuits G01R31/3274

Abstract

A data acquisition and transmitting unit samples the signal indicating the apparatus state quantity from a sensor provided on an apparatus, converts the signal into absolute-time-tagged monitoring data S(t), stores the data S(t), and transmits the data S(t) to a network. A digital protection and control unit takes in the quantity data E about the system of the apparatus and the operating state data P about the apparatus, converts these data into absolute-time-tagged data E(t) and operating state data P(t), stores these converted data, and transmits these data E(t) and P(t) to the network. A data display unit receives the data S(t), E(t), and P(t) from the data acquisition and transmitting unit and digital protective and control unit via the network and displays the state of the apparatus on the basis of the data S(t), E(t), and P(t).

Claims

1. An apparatus monitoring system which monitors an apparatus installed in an electric power installation and is connected to a communication network, said apparatus monitoring system comprising:

sensors, provided on said apparatus, for measuring said apparatus to output monitoring signals that vary according to the state of each part of the apparatus;

a data acquisition and transmitting unit including conversion means which receives the absolute time, to which said sensors supply the monitoring signals, which samples the monitoring signals and converts the sampled signals into absolute-time-tagged digital monitoring data and transmission means for transmitting the digital monitoring data to the communication network; and

a data display unit which receives the digital data from said data acquisition and transmitting unit via said communication network, converts the digital data into display data related to the state of said monitored apparatus, and displays the display data.

2. The apparatus monitoring system according to claim 1, wherein said apparatus to be monitored is a power supply control apparatus for controlling power supply in an electric power transmission system,

said apparatus monitoring system further comprises a digital protection and control unit including means for sampling the electrical quantity data about the system controlled by said power supply control apparatus and the operating state data about the power supply control apparatus and converting the sampled data into absolute-time-tagged digital data, protection and control means for protecting and controlling the system according to the digital data, and transmission means for transmitting the digital data as electrical quantity data and operating state data to said communication network, and

said data display unit receives the digital data from said data acquisition and transmitting unit and the digital data from said digital protection and control unit via said network, converts the digital data into display data related to the state of said monitored apparatus, and displays the display data.

3. The apparatus monitoring system according to claim 1, wherein

said communication network is composed of a first communication network for a local area constructed in each electric power installation and a second communication network for connecting a plurality of electric power installations in a wide area.

4. The apparatus monitoring system according to claim 3, wherein said data acquisition and transmitting unit is connected to said first communication network by means of the ones selected from the wires including the unused wires and power-supply wires in the electric cables.

5. The apparatus monitoring system according to claim 1, wherein one of said data acquisition and transmitting unit and said data display unit determines the part where an abnormality has occurred in said apparatus on the basis the condition monitoring data from the data acquisition and transmitting unit and creates support data according to the determined faulty part.

6. The apparatus monitoring system according to claim 2, wherein one of said data acquisition and transmitting unit, said digital protection and control unit, and said data display unit determines the part where an abnormality has occurred in said apparatus on the basis of one of or both of the condition monitoring data from the data acquisition and transmitting unit and the operating state data from the digital protection and control unit and creates support data according to the determined faulty part.

7. The apparatus monitoring system according to claim 6, wherein said apparatus to be monitored has a plurality of gas sections, and

the faulty part to be determined includes a gas section where a fault is expected to occur and a part where partial discharge it expected to occur.

8. The apparatus monitoring system according to claim 2, wherein one of said data acquisition and transmitting unit, said digital protection and control unit, and said data display unit includes means for calculating an estimated value for a variable related to the continuing deterioration of the function of each part of said apparatus on the basis of one of or both of the apparatus monitoring data from the data acquisition and transmitting unit and the operating state data from the digital protection and control unit and the absolute-time-tagged electrical quantity data from the digital protection and control unit and creating estimated data according to the calculated estimated value.

9. The apparatus monitoring system according to claim 8, wherein one part of said apparatus corresponds to one of a switch contact, a tap selector contact, and a transformer, and

one variable related to said deterioration of the function corresponds to one of the amount of wear of a switch contact, the amount of wear of a OLTC contact, an allowable load on a transformer, the period of time during which an allowable over load can be applied continuously on a transformer, and the service life of a transformer.

10. A method of monitoring the state of an apparatus installed in a user'"'"'s electric power installation and creating necessary data, said apparatus with sensors for measuring monitoring signals of the apparatus state, and said electric power installation being provided with a data acquisition and transmitting unit including conversion means which receives the absolute time, to which said sensors supply the monitoring signals, which samples the monitoring signals and converts the sampled signals into absolute-time-tagged digital monitoring data and transmission means for transmitting the digital monitoring data to a communication network, said method comprising:

the step of prompting the user to enter information for identifying the performance including the ratings of the apparatus via said acquisition and transmitting unit and receiving identification information;

the step of prompting the user to transmit monitoring data about the apparatus via said acquisition transmitting unit and receiving the monitoring data;

the step of prompting the user to transmit the electrical quantity data about the system controlled by said apparatus via said acquisition transmitting unit and receiving the electrical quantity data; and

the step of obtaining the basic performance data about said monitored apparatus by reference to an apparatus database on the basis of said performance identification information, calculating an estimated value for a variable related to the deterioration of the function of the monitored apparatus on the basis of the basic performance data, said received condition monitoring data, and electrical quantity data, and creating estimated data according to the obtained estimated value.

11. The method according to claim 10, wherein the step of creating said estimated data includes

the step of, on the basis of said obtained basic performance data for said apparatus and said received electrical quantity data, calculating, as said estimated value, the accumulated value for the one selected according the apparatus from the amount of wear of a switch contact, the amount of ware of a OLTC contact on its electrode, and the service life of a transformer, and

the step of creating expected inspection timing data about said monitored apparatus on the basis of said calculated accumulated value and said obtained basic performance data.

12. A method of monitoring the state of an apparatus installed in a user'"'"'s electric power installation and creating necessary data, said apparatus to be monitored which is a power supply control apparatus for controlling power supply in an electric power transmission system and which includes means for sampling electrical quantity data about the system controlled by said power supply control apparatus and operating state data about the power supply control apparatus and converting the sampled data into absolute-time-tagged digital data, protection and control means for protecting and controlling the system according to the digital data, and transmission means for transmitting the digital data as electrical quantity data and operating state data to said communication network, said method comprising:

the step of prompting the user to enter information for identifying the performance including the ratings of the apparatus via said transmission means and receiving identification information;

the step of prompting the user to transmit electrical quantity data and operating state data about the apparatus via said transmission means and receiving monitoring data; and

the step of obtaining the basic performance data about said apparatus by reference to an apparatus database on the basis of said performance identification information, determining an faulty part of the monitored apparatus on the basis of the basic performance data and said received operating state data, and creating support data according to the determined faulty part.

13. The method according to claim 12, wherein the step of creating said support data includes

the step of determining the part where an abnormality has occurred in said monitored apparatus on the basis of said obtained basic performance data and said received operating state data, and

the step of, on the basis of said obtained basic performance data and said determined faulty part, creating support data indicating one of whether to continue the operation, the procedure for restoration, and the cause of the abnormality.

14. A program for executing a method of monitoring the state of an apparatus installed in a user'"'"'s electric power installation and creating necessary data, said apparatus being provided with sensors for outputting monitoring signals of the apparatus state, and said electric power installation being provided with a data acquisition and transmitting unit including conversion means which receives the absolute time, to which said sensors supply the monitoring signals, which samples the monitoring signals and converts the sampled signals into absolute-time-tagged digital monitoring data and transmission means for transmitting the digital monitoring data to a communication network, said program comprising:

receiving information for identifying the performance including the ratings of the apparatus via said acquisition transmitting unit;

receiving monitoring data about the apparatus via said acquisition transmitting unit;

receiving electrical quantity data about the system controlled by said apparatus via said acquisition transmitting unit; and

obtaining the basic performance data about said monitored apparatus by reference to an apparatus database on the basis of said performance identification information, calculating an estimated value for a variable related to the deterioration of the function of the monitored apparatus on the basis of the basic performance data, said received condition monitoring data, and electrical quantity data, and creating estimated data according to the obtained estimated value.

15. The program according to claim 14, wherein creating said estimated data includes

calculating, as said estimated value, the accumulated value for the one selected according the apparatus from the amount of wear of a switch contact, the amount of ware of a OLTC contact on its electrode, and the service life of a transformer, on the basis of said obtained basic performance data and said received electrical quantity data for said apparatus, and

creating expected inspection timing data about said monitored apparatus on the basis of said calculated accumulated value and said obtained basic performance data.

16. A program for executing a method of monitoring the state of an apparatus installed in a user'"'"'s electric power installation and creating necessary data, said apparatus to be monitored which is a power supply control apparatus for controlling power supply in an electric power transmission system and which includes means for sampling electrical quantity data about the system controlled by said power supply control apparatus and operating state data about the power supply control apparatus and converting the sampled data into absolute-time-tagged digital data, protection and control means for protecting and controlling the system according to the digital data, and transmission means for transmitting the digital data as electrical quantity data and operating state data to said communication network, said program comprising:

receiving information for identifying the performance including the ratings of the apparatus via said transmission means;

receiving electrical quantity data and operating state data about the apparatus via said transmission means; and

obtaining the basic performance data about said apparatus by reference to an apparatus database on the basis of said performance identification information, determining an faulty part of the monitored apparatus on the basis of the basic performance data and said received operating state data, and creating support data according to the determined faulty part.

17. The method according to claim 16, wherein creating said support data includes

determining the part where an abnormality has occurred in said monitored apparatus on the basis of said obtained basic performance data and said received operating state data, and

creating support data indicating one of whether to continue the operation, the procedure for restoration, and the cause of the abnormality on the basis of said obtained basic performance data and said determined faulty part.