Integrated multi-transformation-ratio transformer and data collection method thereof

Abstract

The invention discloses an integrated multi-transformation-ratio transformer and a data collection method thereof. The integrated multi-transformation-ratio transformer comprises a first measuring current transformer, a first protecting current transformer, a second measuring current transformer, a second protecting current transformer, a first voltage transformer and a second voltage transformer, a secondary side winding of the first measuring current transformer comprises a head end, a tail end and at least one tap end, the first protecting current transformer, the second measuring current transformer and the second protecting current transformer are identical with the first measuring current transformer in structure, and head ends, tail ends and tap ends of secondary side windings of all transformers are connected to a secondary wiring terminal and encapsulated in an insulated fully-closed shell in an integrated manner. Adjustability in transformation ratio of the integrated multi-transformation-ratio transformer is realized, and requirements on adjustability on transformation ratio of the transformer according to load conditions when a power distribution line runs are met; the integrated multi-transformation-ratio transformer is small in size, little in occupied space, conducive to mounting and integrally attractive, wiring mode is simplified, standardization level of power distribution work is improved, difficulty in on-site construction is lowered, construction period is shortened, comprehensive cost is saved, and convenience is brought to subsequent maintenance.

Description

technical field [0001] The invention relates to the technical field of power system distribution automation, in particular to an integrated multi-ratio transformer and a data acquisition method thereof. Background technique [0002] In the distribution network and its automation system, distribution intelligent feeder terminals are generally divided into column terminal FTU, station terminal DTU and distribution transformer terminal TTU. These intelligent terminals must realize the functions of collecting power line current, voltage, power factor, harmonic information, line fault information, etc., and also need to obtain backup power from the power line to support the work of the power distribution terminal (as a backup power supply for the power distribution terminal Charging power supply), these tasks need to be realized by installing corresponding voltage transformers and current transformers on the line. [0003] In the known information collection method, the on-site ...

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Problems solved by technology

[0004] 1. Independent, multiple sets of voltage transformers and current transformers have a long construction and installation period, high overall cost, complex construction design, and large space occupation, which leads to complicated equipment wiring and difficult installation and post-maintenance, especially when these The problem that the separated transformer needs to be installed on the cross-arm of the power tower is more obvious

[0005] 2. Under the condition of fixed transformer transformation ratio, the use of high transformation ratio transformer under long-term low load and the opposite situation will cause long-term inaccuracy of measurement accuracy, quality decline, and reduce the timeliness and accuracy of distribution automation system operation monitoring. Poor practical quality

Due to the fact that the electricity load of some electricity customers or regions is very low or high for a period of time, with large fluctuations, some enterprises adjust their production according to market changes, and the changes in electricity load in rural areas due to seasonal changes If the transformation ratio does not match and the transformer exceeds the measurement range for a long time, the existing fixed transformation ratio method will reduce the timeliness and accuracy of the operation monitoring of the distribution network line. In serious cases, another set of current transformers must be needed re-determine the corresponding transformation ratio of the transformer

This method is not only time-consuming and labor-intensive, but also requires a power outage, and it also increases the cost of the power supply company. The removed transformer is not easy to store, and it is a pity to discard it.

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