PRESENT APPLICATION SITUATION AND DEVELOPMENT TENDENCY OF SYNCHRONOUS PHASOR MEASUREMENT TECHNOLOGY BASED WIDE AREA MEASUREMENT SYSTEM

Synchronized phasor measurements technology can be used to measure the electrical quantities in wide area distributed power system, and a new way is provided for the security analysis and stability control in large-scale power system. The rapid development of satellite navigation, power communication network and digital signal processing technique laid the necessary foundation for the application of synchronous phasor measurement technology. The general development situation of wide area measurement system (WAMS) based on synchronous phasor measurement technology is presented and its architecture, distribution of phasor measurement units (PMU), selection of communication channels and the functional design of its central-station are analyzed. Reviewing the engineering practice of WAMS home and abroad, the existing functions of WAMS, such as on-line monitoring, analysis and control are emphatically described, and the application of WAMS to the closed-loop control of power system in the future is prospected.