Power distribution network current differential protection device based on FPGA

A technology of current differential and protection device, which is applied in the field of current differential protection device of distribution network based on FPGA, can solve the problems of unreliable current differential protection and untimely action, etc., so as to improve reliability and practicability. The effect of action performance

Active Publication Date: 2020-09-29
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0005] The present invention provides an FPGA-based distribution network current differential protection device, which solves the problem of unr

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  • Power distribution network current differential protection device based on FPGA
  • Power distribution network current differential protection device based on FPGA

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0026] Such as figure 1 As shown, an FPGA-based distribution network current differential protection device includes FPGA module, wireless communication module, network interface module, analog quantity acquisition module, switch quantity acquisition module, current differential module, switch quantity output module and human computer interaction module.

[0027] The network interface module, the analog quantity acquisition module, the digital quantity acquisition module, and the current differential module are all connected to the FPGA module, the man-machine interaction module and the digital quantity output module are all connected to the current differential module, and the wireless communi...

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Abstract

The invention discloses a power distribution network current differential protection device based on an FPGA. According to the invention, the FPGA module is introduced, network communication is realized by adopting a hardware TCP/IP protocol stack based on an FPGA, high-speed sampling, packet sending and receiving unpacking of the electric quantity are realized by utilizing the FPGA, real-time andhigh-speed data interaction between the current differential protection devices is realized, the response time from the electrical quantity acquisition and packaging of the local side to the sendingof the slave network interface module in the device is less than 1 millisecond, and the received opposite side data is unpacked and analyzed within 1 millisecond, so that the problems of unreliable and untimely action of current differential protection caused by long delay and large jitter of data transmission for protection due to a wireless communication mode based on a software TCP/IP protocolstack are avoided, the action performance of the current differential protection based on the wireless communication mode is improved, and the reliability and the practicability of the current differential protection are improved.

Description

technical field [0001] The invention relates to an FPGA-based distribution network current differential protection device, which belongs to the technical field of distribution network protection. Background technique [0002] The grid connection of distributed power generation and the change of distribution network structure make the traditional distribution network present the characteristics of multi-source, multi-terminal, and two-way flow of power flow. The distribution network also changes the fault current flow direction and fault characteristics due to the access of distributed power generation. . The traditional three-stage current protection of the distribution network is difficult to meet the protection requirements of the current distribution network. There are problems such as short protection range, difficult setting, and possible mismatch between the upper and lower protections. However, the configuration of current differential protection in the distribution n...

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Application Information

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IPC IPC(8): H02H1/00H04L29/06H02H3/32
CPCH02H1/0061H04L69/16H02H3/32Y04S40/128
Inventor 陈实高磊李娟王晨清朱道华齐贝贝孔祥平宋爽黄哲忱
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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