Electric energy quality collecting device and application thereof in electric energy quality comprehensive analysis system

Abstract

The invention relates to an electric energy quality collecting device and the application of the electric energy quality collecting device in an electric energy quality comprehensive analysis system. The electric energy quality collecting device comprises a power module, a signal input module, a time tick module, a data collection and analysis module, a back plate data bus and an Ethernet port. The electric energy quality comprehensive analysis system is a background manager provided with embedded electric energy quality steady state/transient state synthetic analysis software and receives electric energy quality steady state data and transient state data transmitted by the device in real time to analyze the electric energy quality, and the electric energy quality comprehensive analysis system is high in real-time performance, misses no disturbance events, and can rapidly extract signal envelopes, accurately position transient state characteristics such as the starting time, the duration time and the amplitude of disturbance of the transient state electric energy quality and ensure correctness of extracting transient state information. By applying the synthetic analysis combining the steady state and the transient state of the electric energy quality, the defects that an electric energy quality transient state algorithm is poor in real-time performance and large in calculation quantity can be made up, causes of electric energy quality transient state events can be accurately positioned, and safe and stable operation of an electrical power system and electrical equipment can be ensured.

Description

Technical field [0001] The invention relates to power quality analysis, in particular to a power quality acquisition device and its application in a power quality comprehensive analysis system. Background technique [0002] The power quality problems of existing power systems generally include steady-state power quality problems such as harmonics and transient power quality problems such as voltage sags. The former can damage system equipment, threaten the safe operation of the system, or directly affect or even interrupt the normal operation of users. Power supply, causing serious economic losses. At present, the management of steady-state power quality, as well as the detection and location methods of transient power quality problems, are mostly based on post-event data analysis, focusing only on detecting the starting time and duration of transient power quality problems for engineering There are many practical limitations, and it is impossible to directly locate the deep-sea...

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Problems solved by technology

[0002] Power quality problems in existing power systems generally include steady-state power quality problems such as harmonics and transient power quality problems such as voltage sags. The former will damage system equipment, threaten the safe operation of the system, or directly affect or even interrupt the normal operation of users. power supply, causing serious economic losses

At present, most of the governance of steady-state power quality and the detection and location of

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