CN204761027U - Feeder protection equipment with arc extinction function - Google Patents

Abstract

The utility model discloses a feeder protection equipment with arc extinction function, including DSP, singlechip, DSP passes through the communication of two port RAM with the singlechip and is connected, and still including electromagnetic relay, arc suppressing coil, the last neutral point of power line loops through electromagnetic relay, arc suppressing coil ground connection, and electromagnetic relay's control end inserts the singlechip. The utility model discloses wellly can play the effect that prevents the arc light.

Description

There is the feeder protection equipment of arc eliminator

Technical field

The utility model relates to feeder protection equipment field, specifically a kind of feeder protection equipment with arc eliminator.

Background technology

In electric power system, the general feeder protection equipment that adopts is monitored overcurrent in feeder line and protects, and most feeder protection equipment generally builds based on microcontroller.Prior art feeder protection equipment cannot be monitored arc light in circuit, also cannot carry out corresponding extinguishing arc protection when arc light produces.

utility model contentthe purpose of this utility model is to provide a kind of feeder protection equipment with arc eliminator, to solve prior art Problems existing.

In order to achieve the above object, the technical scheme that the utility model adopts is:

There is the feeder protection equipment of arc eliminator; it is characterized in that: include DSP, single-chip microcomputer; DSP accesses switching input module, data acquisition module; single-chip microcomputer has access to human-computer interaction module, Ethernet communication circuit; and DSP is connected by dual port RAM communication with single-chip microcomputer; also include electromagnetic relay, arc suppression coil, on power bus-bar, neutral point is successively by electromagnetic relay, grounding through arc, the control end access single-chip microcomputer of electromagnetic relay.

The described feeder protection equipment with arc eliminator; it is characterized in that: described data acquisition module comprises the voltage transformer, the current transformer that are arranged in power circuit and gather voltage and current signal; be arranged on the arc photosensor at power circuit breaker in middle device place; and signal conditioning circuit, AD conversion chip; voltage transformer, current transformer, arc photosensor access signal conditioning circuit input respectively, and signal conditioning circuit output accesses DSP by AD conversion chip.

In the utility model, when power circuit normally works, electromagnetic relay is in off-state, arc suppression coil and power circuit separated, can prevent overcurrent-overvoltage in power circuit from causing damage to arc suppression coil.When power circuit breaker in middle device disconnects, the conducting of Single-chip Controlling electromagnetic relay, thus make power circuit neutral point by electromagnetic relay, grounding through arc, play the effect preventing arc light when switching device disconnects.In addition when circuit breaker in middle device closed generation arc light, arc photosensor detects arc optical signal, and be sent to single-chip microcomputer by DSP, by the conducting of Single-chip Controlling electromagnetic relay, by power circuit neutral point by grounding through arc, and then the effect preventing arc light can be played when switching device closes.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Embodiment

Shown in Figure 1; there is the feeder protection equipment of arc eliminator; include DSP, single-chip microcomputer; DSP accesses switching input module, data acquisition module; single-chip microcomputer has access to human-computer interaction module, Ethernet communication circuit, and DSP is connected by dual port RAM communication with single-chip microcomputer, also includes electromagnetic relay, arc suppression coil; on power circuit, neutral point is successively by electromagnetic relay, grounding through arc, the control end access single-chip microcomputer of electromagnetic relay.

Data acquisition module comprises the voltage transformer, the current transformer that are arranged in power circuit and gather voltage and current signal, be arranged on the arc photosensor at power circuit breaker in middle device place, and signal conditioning circuit, AD conversion chip, voltage transformer, current transformer, arc photosensor access signal conditioning circuit input respectively, and signal conditioning circuit output accesses DSP by AD conversion chip.

Claims (2)

1. there is the feeder protection equipment of arc eliminator; it is characterized in that: include DSP, single-chip microcomputer; DSP accesses switching input module, data acquisition module; single-chip microcomputer has access to human-computer interaction module, Ethernet communication circuit; and DSP is connected by dual port RAM communication with single-chip microcomputer; also include electromagnetic relay, arc suppression coil, on power circuit, neutral point is successively by electromagnetic relay, grounding through arc, the control end access single-chip microcomputer of electromagnetic relay.

2. the feeder protection equipment with arc eliminator according to claim 1; it is characterized in that: described data acquisition module comprises the voltage transformer, the current transformer that are arranged in power circuit and gather voltage and current signal; be arranged on the arc photosensor at power circuit breaker in middle device place; and signal conditioning circuit, AD conversion chip; voltage transformer, current transformer, arc photosensor access signal conditioning circuit input respectively, and signal conditioning circuit output accesses DSP by AD conversion chip.