Data processing: generic control systems or specific application – Specific application – apparatus or process – Electrical power generation or distribution system
Reexamination Certificate
1999-10-22
2003-05-27
Picard, Leo (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Electrical power generation or distribution system
C700S293000, C700S286000, C700S022000, C700S086000
Reexamination Certificate
active
06571153
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electric power system protective control system constituted by connecting through a communication network a plurality of protective control apparatuses for protectively controlling an electric power system, a method of controlling the electric power system protective control system and a storage medium storing a program module.
2. Description of the Prior Art
Recently, an electric power system has been widened and distributed with the increase of the demand of electric power so that the numbers of digital protective control apparatuses for protecting and controlling the widened and distributed electric power system have been enlarged.
Therefore, in order to save the monitoring work and the operational work of each of the protective control apparatuses, an electric power system protective control system is devised, wherein the electric power system protective control system is constituted by connecting through a communication network the protective control apparatuses with a display/operation apparatus (referred to remote terminal or operation terminal) disposed in a human control station (a human electric station) remotely arranged to the protective control apparatuses.
The devised electric power system protective control system (monitoring and controlling system) is operative to transmit from the display/operation apparatus a program module to the communication network so that the program module migrates through the communication network to the respective protective control apparatuses, thereby monitoring and controlling the operation and the operating condition of each of the digital protective control apparatuses, said program module being prepared by integrating data for remotely monitoring and controlling each protective control apparatus (such as, for setting a setting value of each protective control apparatus, for executing a protective control operation process thereof and so on) with a procedure of the remotely monitoring and controlling process.
As the program module mobile type of electric power system protective control system, there is a system for controlling relay setting values as the remotely monitoring and controlling operation, which is disclosed in Japanese Unexamined Patent Publication No. 10-222785 (referred to FIG.
41
).
In the system shown in
FIG. 41
, a setting program module (mobile program module)
150
corresponding to contents of operation (control of a relay setting value) by the display/operation apparatus
120
is transmitted by a program module transmitting unit
121
so as to received through a communication network
130
by a program module receiving unit
110
in a digital protective control apparatus
111
. An execution unit
112
in the digital protective control apparatus
110
executes a control operation of the setting value (for example, a changing operation of the setting value) so that the result of the control operation is stored in the program module
150
.
After executing the program module
150
by the execution unit
112
, the program module
150
is transmitted through a transmitting unit
113
to another digital protective control apparatus
140
so that the control operation of the setting value similar to the control operation by the digital protective control apparatus
111
is executed.
Thus, the program module
150
migrating to all of the digital protective control apparatuses so as to execute the control of the setting values thereof by the execution unit
112
is transmitted to the display/operation apparatus
120
so as to be received by a receiving unit
122
thereof. The results of the control operations (the results of setting values) included in the program module
150
are displayed by a display unit
123
on a monitor (not shown).
That is, in the above program module mobile type of electric power system protective control system, it is unnecessary to individually execute the operating and monitoring control, such as a change of a relay setting value to each of the large number of digital protective control apparatuses
111
,
140
widely distributed, making it possible to efficiently execute the operating and monitoring control to each of the digital protective control apparatuses by, for example, single display/operation apparatus
120
.
In the conventional program module mobile type of electric power system protective control system, the program module migrates along a previously determined route of migration (in the electric power system protective control system shown in
FIG. 41
, the digital protective control apparatus
110
→the digital protective control apparatus
140
→ . . . ).
However, in the conventional program module mobile type of electric power system protective control system, for example, while the monitoring and controlling operation (relay setting value control operation) is executed in a certain digital protective control apparatus according to the program module, in the case where some abnormality (hereinafter, referred to control abnormality) in that the present setting value of the protective control apparatus is not gotten due to, for example, the failure of the object of protective control, the setting value exceeding the allowable setting range is set or the like is caused, since there is no means to cope with the control abnormality, the remote monitoring and controlling operator, even if the control abnormality is occurred during the migration of the program module, does not realize the occurrence of the control abnormality until the program module is transmitted to the display/operation apparatus (display/operation terminal).
Therefore, there is the possibility that the control operation has been executed to the protective control apparatus in which the control abnormality is occurred, and in the case where the control abnormality is occurred so that it is necessary to immediately cope with the control abnormality, it takes a lot of time to cope therewith, thereby deteriorating the reliability and the economic characteristic of the program module mobile type of electric power system protective control system.
Furthermore, when the program module migrates along the predetermined route of migration from a certain digital protective control apparatus (origin of migration) to a next digital protective control apparatus (destination of migration), in the case where it is impossible for the program module to migrate to the next destination of migration of the digital protective control apparatus because of occurring a failure in a communication line connecting the origin of migration of protective control apparatus with the destination of migration (migration-destination) of the protective control apparatus, or occurring a failure in the destination of migration of the protective control apparatus itself, since there is no means to cope with the impossibility of migration (non-migration) of the program module, the migration of the program module is stopped, thereby deteriorating the reliability and the economic characteristic of the program module mobile type of electric power system protective control system.
On the other hand, to constitute the conventional program module mobile type of electric power system protective control system, it must be necessary to prepare the mobile program including the contents of protective control and the route of migration by using a complex programming language.
That is, in order to prepare the mobile program module, it must be necessary to prepare the control procedure including the contents of protective control and the route of migration by using the complex programming language based on a communication technology and a programming technology, and therefore, it is impossible for the remote monitoring and controlling operator (engineer), who is not familiar with the communication technology and the programming technology, to prepare the mobile program module required for the program module mobile type of electric power system protective control syst
Koizumi Yoshihiro
Maeda Takeshi
Sekiguchi Katsuhiko
Tanaka Tatsuji
Foley & Lardner
Jarrett Ryan
Picard Leo
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