Optimal configuration method and system for synchronous phasor measurement unit

Abstract

The invention relates to an optimal configuration method for a synchronous phasor measurement unit, which comprises the steps of acquiring an impact load to be monitored; establishing a geographic wiring diagram network structure topology by taking substations as nodes and taking power transmission lines of different voltage levels as branches; determining a connection matrix of each node in the network according to the geographic wiring diagram network structure topology; acquiring an array of upper-level substations directly connected with a substation corresponding to the impact load to bemonitored according to the connection matrix, wherein elements of the array comprise a substation serial number, the number of lower-level impact loads of the substation and state parameters of the synchronous phasor measurement unit; and determining nodes requiring configuration of the synchronous phasor measurement unit according to the array. The invention further provides an optimal configuration system for the synchronous phasor measurement unit. According to the optimal configuration method and system for the synchronous phasor measurement unit, the number of the synchronous phasor measurement units required to be configured can be reduced to be maximum extent while realizing accurate positioning and monitoring for a load-side compulsive oscillation and disturbance source in an electric power system.

Description

technical field [0001] The invention relates to the field of power system safety and stability, in particular to a method and system for optimizing the configuration of a synchronized phasor measurement unit for locating a load-side forced oscillation disturbance source. Background technique [0002] With the increasing scale of the power grid, forced power oscillation occurs many times in the actual power grid, seriously affecting the safe and stable operation of the power grid. The continuous periodic load disturbance in the power system will cause the forced oscillation of the power system. When the disturbance frequency is the same as or close to the natural oscillation frequency of the power system, resonance will occur. The forced oscillation of the power system will reach the maximum value, which is manifested as a violent swing of the rotor angle between units. Large fluctuations in power transmitted by transmission lines. The key to the low-frequency oscillation of...

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Problems solved by technology

[0004] Existing studies mostly focus on the forced oscillation caused by the power disturbance of the prime mover, but the research on the mechanism, influencing factors and location of the disturbance source on the load side is not thorough enough.

There are few monitoring measures specifically aimed at the load-side forced oscillation. Therefore, it is urgent to provide a PMU configuration method that can be used to locate the disturbance source of the load-side forced oscillation to make up for the above technical gaps.

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