Power system sub-/super-synchronous oscillation wide-area monitoring method and power system sub-/super-synchronous oscillation wide-area monitoring system

Abstract

The invention discloses a power system sub- / super-synchronous oscillation wide-area monitoring method and a power system sub- / super-synchronous oscillation wide-area monitoring system. The method comprises the following steps: dividing a target grid into multiple partitions, and setting monitoring nodes for the multiple partitions respectively; acquiring the sub- / super-synchronous voltages and sub- / super-synchronous currents of all the monitoring nodes; carrying out synchronous processing and synchronous state estimation on the sub- / super-synchronous voltages and sub- / super-synchronous currents of all the monitoring nodes to get the sub- / super-synchronous oscillation condition of the target grid; and carrying out display according to the sub- / super-synchronous oscillation condition of the target grid, and judging whether there is a need to issue a warning for the sub- / super-synchronous oscillation condition of the target grid according to a preset warning rule. The method and the system have the advantage that the method and the system can help dispatching personnel to know the real-time operation situation of the grid, find sub- / super-synchronous oscillation in time and take corresponding measures to quickly eliminate the adverse impact of sub- / super-synchronous oscillation on the system, so as to guarantee the stable operation of the power system.

Description

technical field [0001] The invention relates to the technical field of dynamic monitoring of power systems, in particular to a method and system for sub / super synchronous oscillation wide-area monitoring of power systems. Background technique [0002] In recent years, due to the rapid and continuous development of new energy generation and transmission technologies, various power electronic equipment or devices, such as doubly-fed wind turbines, direct-drive wind turbines, photovoltaic power generation, static synchronous compensators (STATCOM), and flexible DC transmission converters, have gained However, the interaction between these new power equipment and the grid will also cause dangerous sub / supersynchronous oscillations, which will affect the safe and stable operation of the power system and the quality of power supply. In addition, in order to improve the transmission capacity of the line and the transient stability of the power system in the AC transmission system, ...

AI Technical Summary

Problems solved by technology

For dispatchers, it is impossible to grasp the relevant information of sub / supersynchronous oscillation at the system level in time, and it is impossible to capture real-time and / or dynamic information of sub / supersynchronous oscillation in different locations of the large-scale power system at the same time

Dispatchers can only obtain relevant information about sub / supersynchronous oscillations after the data of unit torsional vibration monitoring and protection devices are reported by on-site personnel, and online monitoring analysis and global early warning of subsynchronous oscillations cannot be realized

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