Configuration method of electric system phasor measuring units

Abstract

Provided is a configuration method of electric system phasor measuring units. The configuration method of the electric system phasor measuring units comprises the steps that sorting is carried out on vulnerability indexes of nodes in a power grid, the nodes are classified according to the sequence of the vulnerability indexes, configuration of the PMUs is carried out on the basis of the maximum tree principle according to plans of the number of the PMUs, to be configured, in each sub-region, and after configuration of the PMUs meets the requirement for complete observability, the PMU check and installation design is carried out on vulnerability components in the process that N-1 faults happen. According to the configuration method of the electric system phasor measuring units, due to the fact that the maximum tree principle is used for carrying out optimal configuration on the PMUs, the global optimal solution can be obtained rapidly, and the purposes that the PMUs are configured in a phased mode under the condition that observation cannot be carried out, and observability and economy of configuration are ensured at the same time when the N-1 faults happen are achieved; good balance among economy, safety and the time benefit is achieved, the conditions of partial areas, with assembled PMUs, in an existing power grid are taken into full consideration, flexibility is good, and implementation performance is good.

Description

technical field [0001] The invention relates to a stage-by-stage optimal configuration method of a phasor measurement unit (Phasor Measurement Unit, PMU) based on the maximum tree theory, which belongs to the field of measurement technology. Background technique [0002] The phasor measurement unit PMU uses the GPS signal to synchronously collect sub-second level analog voltage and current signals, obtains the amplitude and phase angle of the voltage and current signals, and transmits them to the data concentrator of the dispatching center, so that the dispatching center can obtain the entire The synchronized phasor of the power grid is used for real-time monitoring, protection and control, so the PMU is considered to be the most important measurement device for the power system in the future. [0003] As a basic device for realizing phasor measurement technology, PMU can be installed in different locations selected in the power system, but under the existing technical cond...

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Problems solved by technology

[0004] Existing methods for achieving observable PMU configuration include simulated annealing (SA), genetic algorithm, tabu search (TS), particle swarm optimization (PSO), etc. The biggest disadvantage of these methods is the slow convergence speed. Requires a long execution time, and it is difficult to obtain the global optimal solution, which limits their application in practical large-scale power systems

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