Alternating current/direct current transient steady state integrated detection device

Abstract

The invention discloses an alternating current / direct current transient steady state integrated detection device. The alternating current / direct current transient steady state integrated detection device includes an alternating current / direct current transient steady state integrated test power source and an electronic type current transformer field test detection system; the alternating current / direct current transient steady state integrated test power source includes a direct-current impact power source, a direct-current transient steady state power source, an alternating current power frequency transient steady state power source and a combined loop control system; and the electronic type current transformer field test detection system includes a standard transformer, a standard conversion device and a transformer composite error tester. With the detection device adopted, transient steady state integrated tests of a direct current transformer and an alternating current transformer can be realized separately. With a method according to which a combined test loop composed of the direct-current impact power source, the transient steady state test power source and the alternating current transient steady state test power source is adopted, the capacity of an energy-storage capacitor in a direct-current impact / transient steady state test can be obviously decreased, and important parameters such as a transient current peak value, a decay time constant and step current response can be adjusted and configured more flexibly and accurately.

Description

technical field [0001] The invention relates to an integrated detection device for AC and DC transient stability, in particular to an integrated detection device for AC and DC transient stability based on modular design for electronic current transformers (ECT), including DC impact / temporary stability The synthetic test loop method composed of the test power supply and the AC transient stability test power supply can respectively realize the transient stability integrated test of the DC current transformer and the AC current transformer, and belongs to the technical field of the transformer detection test in the electrical industry. Background technique [0002] In my country, the characteristics of the reverse distribution of energy resources and consumption centers determine that the grid must adopt a development strategy of large-capacity, long-distance, and high-voltage power transmission, and gradually build a strong grid with strong AC and strong DC complementing and su...

AI Technical Summary

Problems solved by technology

However, due to the large difference in the time constant of the transient characteristics in the actual test, the design difficulty of the adjustable inductance of the DC transient circuit is greatly increased or even difficult to realize. At the same time, in order to meet the above requirements, the overall energy storage capacity and system design are also difficult and costly. greatly increase

The larger the time constant, the more difficult and expensive it is to design the energy storage system and test circuit. In order to meet the test requirements for a time constant of 200 ms and above, the cost of the DC transient test system alone is as high as several million for the energy storage capacitor and the test circuit. It is very large and bulky, which is not conducive to future upgrades and flexible use on site. It cannot meet the application requirements of the transformer transient characteristic test, and is not conducive to the popularization and wide application of the transformer transient characteristic test technology.

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