Distinguishing method and device for reactive compensation switching state of distribution transformer
A technology of distribution transformers and switch-on/off status, which is applied in the field of distribution network, can solve problems such as difficult to guarantee the accuracy of analysis results and low efficiency, and achieve the effects of avoiding analysis obstacles, improving accuracy, and improving simulation efficiency
Active Publication Date: 2022-04-01
MEIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORP
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[0003] In the existing technology, the judgment of the reactive power compensation switching status of the distribution transformer is mainly based on the multi-day historical changes of the transformer power factor. Accuracy is difficult to guarantee and efficiency is low
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[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0045] In the present invention, distribution transformer reactive power compensation refers to devices such as parallel capacitors installed at the distribution panel (cabinet) on the 400V low-voltage side of the transformer, which play the role of adjusting reactive voltage and improving power factor. The reactive power compensation devices of distribution transformers on the actual site have different configuration capacities, different product models, and large differences in intelligence levels. Among them, ma...
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The invention discloses a method and a device for judging reactive compensation switching states of a distribution transformer. The method comprises the following steps: acquiring single-day 96-point measurement data of the distribution transformer, a low-voltage user meter connected with the distribution transformer and a feeder line to which the distribution transformer belongs, and parameter data of a power distribution network to which the distribution transformer belongs; constructing a topological model according to the measurement data and the parameter data; preprocessing the reactive power of the distribution transformer to be judged; and based on the preprocessed reactive power of the to-be-judged distribution transformer, simulating the to-be-judged distribution transformer in combination with the topology model, and determining the reactive compensation switching state of the to-be-judged distribution transformer according to a simulation result. According to the technical scheme provided by the invention, whether reactive compensation of the distribution transformer is input or not is accurately judged under the incomplete measurement condition, analysis obstacles caused by incomplete measurement data collection are avoided, and the reactive power flow simulation efficiency of a power distribution network is improved.
Description
technical field [0001] The invention relates to the technical field of distribution network, in particular to a method and a device for discriminating the reactive power compensation switching state of a distribution transformer. Background technique [0002] The distribution line itself has the characteristics of complex topology, frequent equipment changes, and variable operation modes. Under the background of large-scale access to new energy sources such as distributed photovoltaics and wind power, the distribution of reactive power flow in the distribution network tends to change. , which puts forward higher requirements for power flow analysis and load forecasting of distribution network. The current distribution network analysis and prediction methods rely on the line equipment parameters and operating data in the power grid production management system, GIS system and metering automation system for topology model construction and simulation analysis, among which the r...
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Login to View More IPC IPC(8): H02J3/18
CPCY02E10/76H02J3/18
Inventor 李志华谢明磊曹德发廖明李延宾李灵勇罗海波罗威魏存良曾晓丹潘旭扬
Owner MEIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORP