Routine shunt reactor fixed on the EHV transmission system can not guarantee the transmission capability and steady state voltageofsystem under different operation modes.
常规并联电抗器固定接入超高压输电系统，不能保证各种运行方式下系统输送能力和母线的稳态电压。
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Devices called synchrophasors can sample voltage and current 30 times a second or faster-giving utilities and system operators a far more accurate view of the health of the grid.
Physical parameters range from the temperature of CPUs, utilization of memory and file system, interface utilization, and voltage reading, among other physical values.