Current and voltage detection type insulating bush of ring main switching device

Abstract

The invention, which belongs to the technical field of ring main distribution switch equipment in a power system, relates to a current and voltage detection type insulating bush of a ring main switching device. The current and voltage detection type insulating bush comprises a conductive rod, a voltage sensor and a current sensor; and the components form an integrated structure by using epoxy resin casting. According to the invention, the current sensor, the voltage sensor and the insulting bush are combined organically, so that the voltage and current detection performance is realized and the provided insulating bush also has advantages of compact structure and small size. In addition, the signals that are detected by the current sensor and the voltages sensor are weak ones, thereby realizing digital conversion and meeting the IEC61850 technology-based communication requirement conveniently.

Description

technical field [0001] The invention belongs to the technical field of ring network power distribution switchgear in electric power systems, and in particular relates to a current and voltage detection type insulating bushing for ring network switchgear. Background technique [0002] In the urban distribution network, due to the safety, reliability and beauty of underground cable lines, more and more power distribution methods use underground cable lines. The commonly used distribution switchgear for underground cable lines is ring network cabinets and cable branches. box. The current and voltage detection methods of these two switchgears are to install traditional electromagnetic current transformers and voltage transformers in the equipment box, which not only increases the ring network cabinet and cable branch box, but also brings electromagnetic current transformers and Electromagnetic saturation, electromagnetic resonance and other defects of voltage transformers. On t...

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Problems solved by technology

The current and voltage detection methods of these two switchgears are to install traditional electromagnetic current transformers and voltage transformers in the equipment box, which not only increases the ring network cabinet and cable branch box, but also brings electromagnetic current transformers and Electromagnetic saturation, electromagnetic resonance and other defects of voltage transformers. On the other hand, with the development of smart grids, based on IEC61850 technology, current transformers and voltage transformers use electronic or photoelectric transformers to facilitate digital conversion of signals. Therefore, the switchgear installed in the ring network cabinet and the cable branch box is required to have a current sensor and a voltage sensor, but at present, there are no related products used in the ring network cabinet and the cable branch box

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