Distributed photovoltaic power generation grid-connected power quality monitoring device

Abstract

The invention discloses a distributed photovoltaic power generation grid-connected power quality monitoring device which comprises a metering sampling circuit, the metering sampling circuit is respectively connected with a voltage sampling circuit and a current sampling circuit, the voltage sampling circuit and the current sampling circuit are respectively connected with a master control system, the master control system is connected with the metering sampling circuit, and the metering sampling circuit is connected with the metering sampling circuit. The main control system is also respectively connected with a residual current sampling circuit, a release driving circuit, a temperature sampling circuit, a current conditioning circuit and a key display circuit, the metering sampling circuit comprises a metering chip, and the metering chip is respectively connected with a metering voltage sampling circuit and a metering current sampling circuit. According to the device, the grid connection condition of the distributed photovoltaic power station can be visible, measurable and controllable, the problem that power station data generated after grid connection of the distributed photovoltaic power station is difficult to collect and control is solved, the safety problem of maintenance of a distribution network is solved, monitoring is accurate, and synchronous, safe, economical and low-carbon operation of the distributed photovoltaic power station and the distribution network is achieved.

Description

technical field [0001] The invention relates to the technical field of distributed photovoltaic grid-connected monitoring, in particular to a distributed photovoltaic power generation grid-connected power quality monitoring device. Background technique [0002] With the rapid growth of the construction of distributed photovoltaic power stations and the increasing capacity, the grid connection problems are mainly reflected in: 1. The harmonic increment during grid connection interferes with the main network; 2. The main network is powered off to form islands 3. The grid-connected capacity of multiple photovoltaic power stations in a station area brings difficulties to the load regulation of the dispatch center; 4. The power outage operation brings huge safety risks of reverse power transmission. At present, the grid-connected control points of photovoltaic power generation mainly use circuit breakers with voltage loss and tripping as grid-connected switches. Many grid-connect...

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Problems solved by technology

However, it did not propose a specific device structure and circuit

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