Distribution network simulation system

Abstract

The invention provides a distribution network simulation system. The system comprises a simulation distribution network, a fault simulation device which is arranged in the distribution network to trigger a fault in the distribution network, section switches distributed in the distribution network to isolate the fault, a collecting device which is arranged in the distribution network to collect the voltage and current of each node of the distribution network, a control device which is connected with the fault simulation device, the section switches and the collecting device, a human-computer interaction device which is communicatively connected with the control device to set the fault of the distribution network, and a recorder which is arranged in the distribution network, is communicatively connected with the human-computer interaction device, and is used for recording the change of the electric quantity of the distribution network before and after the fault and feeding back the change to the human-computer interaction device. The distribution network simulation system provided by the invention can comprehensively and accurately simulate the dynamic behaviors of the distribution network under normal operation and fault condition, and is visual, broad, flexible and integral.

Description

technical field [0001] The invention relates to a distribution network simulation system. Background technique [0002] The reliability of distribution network power supply is a prerequisite for residents to improve their production and living quality. Relay protection is the basic support technology of distribution network, which greatly affects the reliability of power supply of distribution network. In the safe operation and future development of distribution network, the application of relay protection technology has great practical significance. At present, my country's power grid is developing in the direction of intelligence. With the proposal of distributed power generation, active distribution network came into being. The active distribution network refers to the distribution network with distributed energy, active control and operation capabilities. It is a frontier branch of the smart grid. Relay protection technology is an important anti-accident measure to ensu...

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Problems solved by technology

Compared with the high-voltage transmission network, the distribution network has problems such as weak grid structure and low level of technical equipment, and the network structure characteristics, protection configuration and setting calculation of the two are not completely the same, and the existing physical simulation of the distribution network The scale of the system is relatively simple. It consists of basic primary components and certain automation devices. It provides basic data for short circuit or single-phase grounding. The transient process of the simulated system when it fails is not similar to the original system. The system impedance changes greatly when operating in different power supply environments, and the versatility is not strong; the fault simulation is carried out without considering the fault phase angle, which leads to certain defects in the distribution network fault simulation

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