Patent ID: 7930124

Claim:
A protection control measurement system, comprising measurement terminals which acquire electric quantities from an electric power system a parent station device having arithmetic operation means for performing protection and control of the electric power system or measurement processing based on the electric quantities, and a communication network connecting the parent station device with at least one of the measurement terminals, wherein the measurement terminals each comprises real-time transmission means for transmitting the electric quantities to the parent station device within a prescribed time, and message transmission means for transmitting to the parent station device, as setting values, correction coefficients to improve the operation accuracy of the protection and control or measurement processing, a transmission priority of the message transmission being lower than that of the real-time transmission; the real-time transmission means transmits the electric quantities within a prescribed time with higher priority than the message transmission over the communication network; the message transmission means transmits the setting values within a prescribed time after transmission of the electric quantities over the communication network; and the arithmetic operation means performs correction in which the electric quantities received from the real-time transmission means are corrected using the setting values received from the message transmission means to calculate input electric quantities.