Configuration method of electric system phasor measuring units

A technology of phasor measurement unit and configuration method, which is applied in the field of measurement and can solve problems such as limited application, long execution time, and slow convergence speed

Active Publication Date: 2014-04-30
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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  • Claims
  • Application Information

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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

Method used

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  • Configuration method of electric system phasor measuring units
  • Configuration method of electric system phasor measuring units
  • Configuration method of electric system phasor measuring units

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Embodiment Construction

[0057] The present invention comprises the following steps:

[0058] (1) According to the entropy theory, the vulnerability indicators of each node in the power grid are sorted, and each node is divided into three categories according to the size of the indicators: severe vulnerable nodes, moderately vulnerable nodes and strong nodes, which are N-1 faults in step c Prepare for timely PMU inspection and installation.

[0059] The present invention uses the DC power flow method to predict the impact on the energy distribution of the system when a certain node is disturbed, that is, the vulnerability index of the node. The steps are as follows:

[0060] ① Define the node on the branch road Power flow distribution factor on for:

[0061]

[0062] in,

[0063] - branch road reactance;

[0064] - the corresponding element in the node impedance matrix of the grid under normal conditions.

[0065] constitute The first-order node power flow distribution factor ...

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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...

Claims

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Application Information

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IPC IPC(8): G06Q50/06G06Q10/04
CPCY02E40/70Y04S10/50
Inventor 徐岩应璐曼刘泽锴钱新凤
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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