Synchronous-phasor and electric-energy-quality integrated monitoring system and method of power distribution network

Abstract

The invention discloses a synchronous-phasor and electric-energy-quality integrated monitoring system and method of a power distribution network. The synchronous-phasor and electric-energy-quality integrated monitoring system comprises a synchronous-phasor and electric-energy-quality monitoring integrated machine and a master station server, and the synchronous-phasor and electric-energy-quality monitoring integrated machine is in communication with the master station server; the synchronous-phasor and electric-energy-quality monitoring integrated machine is used for carrying out synchronous measurement on main electrical variables including the voltage phasor, the current phasor and the frequency in a terminal power grid, and meanwhile completes monitoring and analysis of power grid harmonic waves and three-phase unbalance variables. The synchronous-phasor and electric-energy-quality integrated monitoring system and method have the advantages that dynamic power-grid behaviors and electric energy quality information on the low-voltage side of a power distribution network can be monitored in real time, the functions of a synchronous-phasor measuring device and the functions of an electric-energy monitoring device are integrated, the size is small, and convenience is brought to installation. More compacter and panorama stable and dynamic behavior monitoring is provided for power grid running in cooperation with a conventional synchronous phasor measuring device and an electric energy quality monitoring device of a high-voltage power grid.

Description

technical field [0001] The invention relates to the technical field of power system data measurement and analysis, in particular to an integrated monitoring system and method for synchronous phasor and power quality of a distribution network. Background technique [0002] Conventional synchrophasor measurement units (PMUs) and power quality monitoring devices are generally installed in high-voltage substations and main power plants to monitor the dynamic behavior and power quality problems of the high-voltage main network, respectively. For a dedicated power quality monitoring system or wide-area measurement system, it includes a large number of measurement devices, sub-station analysis systems, master station analysis systems, application servers and databases, network equipment and other software and hardware systems, which usually need to be built separately. Investment and operation and maintenance costs are relatively large. [0003] In recent years, great changes have...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above problems, and propose a distribution network synchronized phasor and power quality integrated monitoring system and method, which can not only monitor the dynamic behavior of the low-vo...

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