Method for carrying out synchronous on-line detection on data of 10kV merging units (MUs) based on voltage-phase comparison

A technology of synchronous detection and voltage phase, applied in the direction of phase angle between voltage and current, measurement of electricity, measurement device, etc., to achieve the effect of synchronous online detection and improve reliability

Active Publication Date: 2014-07-02
广州穗华能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this stage, no individual or unit has proposed corresponding measures for the engineering problem of realizing online real-time detection of whether the sampling between MUs is synchronized

Method used

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  • Method for carrying out synchronous on-line detection on data of 10kV merging units (MUs) based on voltage-phase comparison
  • Method for carrying out synchronous on-line detection on data of 10kV merging units (MUs) based on voltage-phase comparison
  • Method for carrying out synchronous on-line detection on data of 10kV merging units (MUs) based on voltage-phase comparison

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Embodiment

[0029] In this embodiment, three feeders connected to the same busbar are taken as an example for the following description.

[0030] The wiring diagram of the merging unit (MU) of the present invention is as figure 1 As shown, three feeders F1, F2 and F3 connected to the same bus, each feeder is equipped with a merging unit (MU) device, and the merging unit (MU) is responsible for collecting the bus voltage on the voltage / current transformer value and the current value of the feeder. It can be seen from the actual wiring diagram that the voltage transformers that provide voltage signals for the merging unit MU1, MU2 and MU3 are connected in parallel on the same bus, and the voltage values ​​(including instantaneous value and phase) at both ends are equal. The merging unit MU1, the merging unit MU2 and the merging unit MU3 input the collected voltage value and current value to the synchronous detection device through the feeder to realize the synchronous detection method.

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Abstract

The invention provides a method for carrying out synchronous on-line detection on data of 10kV merging units (MUs) based on voltage-phase comparison. The method comprises the following steps that: 1, a synchronous detection device is started to carry out statistics on sampling value (SV) messages of a cycle; 2, the synchronous detection device carries out judgment on the occurrence of sampling point loss of all MUs in one cycle; 3, the synchronous detection device carries out judgment on the integral-multiple time lengths (differing by one cycle) between the MUs; and 4, the synchronous detection device calculates the waveform phases of all the MUs in one cycle, selects at least two same-moment sampling points, and carries out voltage-phase comparison on the two sampling points. In the method disclosed by the invention, voltage phases are compared, so that a situation of whether the MUs are synchronous can be effectively judged, thereby realizing the synchronous on-line detection on the data of the MUs.

Description

technical field [0001] The invention relates to the technical field of synchronous detection of data transmission, more specifically, to a detection method for data synchronization between 10kV merging units (MUs) based on voltage phase comparison. Background technique [0002] The merging unit (MU) is an intelligent electronic device widely used in digital substations. The structure of the digital substation is divided into three layers, the station control layer, the interval layer and the process layer. The MU works on the process layer. Its tasks It collects the voltage value and current value transmitted by the electronic voltage / current transformer according to a certain sampling rate, and transmits these sampling points to the intelligent electronic device of the interval layer through the process layer network in the form of a sample value (SV) message . A substation needs to be equipped with multiple MU devices at the same time. These MUs together form a distribute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R25/00
Inventor 蔡泽祥竹之涵刘文泽马文霜苏忠阳
Owner 广州穗华能源科技有限公司
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