Phase-zero sequence integrated voltage sensor for sulfur hexafluoride circuit breaker

Abstract

The invention discloses a phase-zero sequence integrated voltage sensor for a sulfur hexafluoride circuit breaker. A high-voltage end primary insert is arranged above a high-voltage primary capacitorfixed block, the capacitor fixed block penetrates through a high-voltage end phase-zero sequence child-mother integrated polypropylene capacitor from top to bottom, a primary capacitor internal connecting wire is arranged on a left side of the high-voltage end phase-zero sequence child-mother integrated polypropylene capacitor, a low-voltage end secondary insert is arranged at the left end of theprimary capacitor internal connecting wire, a secondary capacitor junction box is arranged on the left side of the low-voltage end secondary insert, and a low-voltage end phase sequence polypropylenecapacitor and a low-voltage end zero sequence polypropylene capacitor are arranged in the secondary capacitor junction box. The integrated voltage sensor disclosed by the invention is suitable for being matched with an LW3 sulfur hexafluoride circuit breaker; through the intelligent combination of internal circuits, the multifunctional requirements of three-phase voltage sampling, measurement, protection, zero sequence and discharge are integrated, and the voltage sensor is applied to the LW3 sulfur hexafluoride circuit breaker switch of power distribution equipment, and can really achieve theprimary and secondary deep integrating.

Description

technical field [0001] The invention relates to the field of voltage sensors, in particular to a phase-zero-sequence integrated voltage sensor for sulfur hexafluoride circuit breakers. Background technique [0002] In order to meet the requirements of the fine management of the national grid line loss and realize the measurement of the line loss of the distribution network, it is necessary to put forward new requirements for the voltage sensor of the primary equipment to meet the requirements of measurement accuracy. With the rapid development of electronic technology, microcomputer relay protection devices gradually occupy a dominant position. In relay protection and measurement, the energy flow and information flow of the control part are separated, so the monitoring equipment no longer needs high-power output sensors. sampling. At the same time, due to the rapid development of the power industry and the more complex grid conditions, smart current and voltage transformers...

AI Technical Summary

Problems solved by technology

Due to the switch of sulfur hexafluoride circuit breaker; small size, narrow space, high pressure resistance requirements; traditional electromagnetic sampling device has shortcomings such as narrow frequency band and slow response; therefore, a phase zero sequence for LW3 sulfur hexafluoride circuit breaker is developed The integrated voltage sensor provides voltage acquisition signals for the power distribution terminal FTU / DTU. A multi-functional integrated three-phase intelligent voltage sensor with voltage sampling, measurement, protection, zero sequence, and discharge is imminent

Images