Abstract: A protection and control system which is capable of surely updating a program without a program update by an operator and without deactivating a power system is provided. A protection and control device 1 includes an update accepting unit 1c that determines whether or not to accept the update of the program from a managing server 3, and an updating processing unit 1d that receives an updating program and that updates the program. The managing server 3 includes an update determining unit 3c that determines whether or not a supplied update program is for updating the program of the predetermined protection and control device 1, a transmitting unit 3b that transmits an update notification to the protection and control device 1 on which the program to be updated is loaded, and a receiving unit 3a that receives a reply to the update notification from the protection and control device.

Abstract: A protection and control system which is capable of surely updating a program without a program update by an operator and without deactivating a power system is provided. A protection and control device 1 includes an update accepting unit 1c that determines whether or not to accept the update of the program from a managing server 3, and an updating processing unit 1d that receives an updating program and that updates the program. The managing server 3 includes an update determining unit 3c that determines whether or not a supplied update program is for updating the program of the predetermined protection and control device 1, a transmitting unit 3b that transmits an update notification to the protection and control device 1 on which the program to be updated is loaded, and a receiving unit 3a that receives a reply to the update notification from the protection and control device.

Abstract: An analog-digital converting unit converts the electrical quantity obtained from a power system into a digital amount. A non-volatile memory stores a protective control program that achieves the function of a digital protective control device. A processor executes the protective control program to perform arithmetic processing on the digital amount output by the analog-digital converting unit. The protective control program includes a basic program and an added program divided in accordance with the function of the digital protective control device. The added program includes valid operation period information. The processor executes the added program within the valid operation period.

Abstract: A protective control device includes a clock unit that clocks a date and time, a time information creating unit which associates the operation status of the application with time information obtained from a clock unit, and which creates application time information, a time information memory unit that stores the application time information, and a time information output unit that outputs the application time information stored in the time information memory unit to an output unit. The protective control device can obtain information required to calculate an application fee.

Abstract: This invention provides a protection control measurement system, with excellent economy and maintainability. In the protection control measurement terminal 1, electric quantity acquisition and transmitter 14-1 determines synchro-phasor quantities from electric quantity data and transmits the synchro-phasor quantities to arrival time-guaranteed transmitter 15-1. The arrival time-guaranteed transmitter 15-1 transmits in real- time the synchro-phasor quantities to the parent station device 3. Setting value transmitter 14-2 transmits setting value data to the message transmitter 15-2, which performs message transmission to the parent station device 3 over the communication network 2. In the parent station device 3, electric quantity arithmetic processor 32-1 calculates electric quantities as close as possible to true values by multiplying received synchro-phasor quantities by setting value data.

Abstract: This invention provides a protection control measurement system, with excellent economy and maintainability, which collects protection control measurement data via a communication network from a plurality of terminals which acquire electric quantities. In the protection control measurement terminal 1, electric quantity acquisition and transmission means 14-1 determines synchro-phasor quantities from electric quantity data and transmits the synchro-phasor quantities to arrival time-guaranteed transmission means 15-1. The arrival time-guaranteed transmission means 15-1 transmits in real-time the synchro-phasor quantities to the parent station device 3. Setting value transmission means 14-2 transmits setting value data to the message transmission means 15-2, which performs message transmission to the parent station device 3 over the communication network 2.