Power distribution network physical simulation experiment system with arc light grounding variable structure

Abstract

The invention discloses a power distribution network physical simulation experiment system with an arc light grounding variable structure. A small-capacity, miniaturized and modularized object simulation system is established according to the Newton similarity theory and comprises an infinite system module, a distribution transformer module, a cable and overhead transmission line module, a neutralpoint grounding mode module, a switch and measurement system module, various load system modules, a monitoring and detection module, a fault simulation module and an arc light simulation module. Through combination of the modules, different power distribution network topological structures are flexibly built. A low-voltage arc grounding test system is constructed, micron-scale step length controlis adopted, a graphite discharge electrode gap is moved to form arc discharge, the operation state of a power grid is monitored through a waveform recorder, arc discharge fault waveforms are recordedand analyzed, and power distribution network test research is carried out. A real reflection prototype system physical model and a fault simulation test platform are established, and transient faultinformation such as disconnection and short circuit is restored, and arc light grounding or arc light high-resistance grounding simulation is carried out.

Description

technical field [0001] The invention belongs to the technical field of power system distribution automation, and more specifically relates to a distribution network physical simulation experiment system with an arc grounding variable structure. Background technique [0002] Chinese invention application CN106199310A is a simulation test equipment and method for intermittent arcing ground faults in distribution networks. This application uses large-capacity resistors and fuses to ground the grounding electrode of the arc discharge model on a real 10kV transmission line, and passes pulse signals Intermittent arc discharge is realized by controlling the stepper motor of the arc discharge model. However, the experiment of this invention application scheme will be subject to many conditions. It is the electric power company's on-site arc grounding experiment under specific conditions, and it cannot and cannot do phase-to-phase faults, so it does not have versatility. It is not s...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem that in the current low-current grounding system, reliable identification of arcing ground faults cannot be achieved, and single-phase arcing grounding faults are often accompanied by severe electromagnetic transient overvoltages It is necessary to establish a technical problem that can flexibly change the physical model of the distribution network topology to conduct experimental research on the arc transient characteristics.

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