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An intelligent protection system for flexible DC distribution network based on neural network

A flexible DC power distribution and neural network technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as unsatisfactory results, achieve efficient fault diagnosis, and ensure safe and stable operation.

Active Publication Date: 2018-10-26
CHINA THREE GORGES UNIV
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Problems solved by technology

Compared with the advantages of quick action, selectivity, sensitivity and reliability of the relay protection in the mature AC transmission and distribution network, this offline method is not ideal.

Method used

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  • An intelligent protection system for flexible DC distribution network based on neural network
  • An intelligent protection system for flexible DC distribution network based on neural network
  • An intelligent protection system for flexible DC distribution network based on neural network

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0025] A neural network-based intelligent protection system for flexible DC distribution networks, including data acquisition and real-time database systems, data analysis expert systems, and execution systems. The data acquisition and real-time database system is used to monitor and measure the status of the power system. It is composed of sensors as the main components, and is arranged on the distributed generation side, user side and various links of the power distribution network. The sensors mainly applied include the voltage sensor 3, the current sensor 4, and the electric field parameter sensor 5 and the magnetic field parameter sensor 2 for measuring the electromagnetic field existing around the electrical equipment. These sensors collect the data of various points...

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Abstract

The invention discloses an intelligent protection system for a flexible DC distribution network based on a neural network. Power grid data acquired by each sensor distributed at a distributed power generation side, a user side and a line of the DC distribution network are transmitted to a signal acquisition module, the data are converted to corresponding digital signals, the digital signals are transmitted to a central processing unit for analysis and processing, data classification is then carried out, signal feature extraction is carried out, and information reflecting the operation state of the power grid in real time can be obtained. If a fault signal is detected, a real-time database is entered, an expert database is called to the real-time database, after a fault type is diagnosed, a corresponding measure is taken, and a tripping / closing action of the system is controlled and executed. An artificial intelligence technology applicable to a complicated system and a computer technology are combined, the neural network is introduced, the expert database is updated continuously through the algorithm, fault diagnosis on the DC distribution line is more efficient, accurate and reliable, intelligent protection for the DC distribution line is realized, and the DC distribution system is ensured to operate safely and stably.

Description

technical field [0001] The invention relates to a neural network-based intelligent protection system for a flexible DC distribution network, which relates to the field of DC system fault detection technology and protection measures in power systems. Background technique [0002] Faults in flexible DC distribution network systems have always been a problem that cannot be ignored in power systems. Among them, branch grounding and short-circuit between poles are relatively common faults in DC systems. If they cannot be found and eliminated in time, multi-point grounding in the system will occur. , it will cause a short circuit of the DC power supply or a malfunction of the protection equipment, causing serious consequences. [0003] At present, most DC system fault protection devices or systems are implemented on the basis of single-chip microcomputers, but the flexible DC distribution network in the early stage of development has not yet had good performance and reliability in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/262H02H7/268
Inventor 马辉熊舟程江洲鄢圣阳朱偲
Owner CHINA THREE GORGES UNIV
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