A configuration method for fuse protection of 380v distribution network connected to distributed power
A technology of distributed power supply and configuration method, which is applied in the direction of overcurrent protection, etc., can solve the problems of system failure characteristics change, configuration mode no longer applicable, etc., to improve safety, enhance reliability, configuration and selection reasonable effect
Active Publication Date: 2018-10-26
STATE GRID CORP OF CHINA +2
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However, after the distributed power supply is connected to the 380V low-voltage distribution network, the change of the system fault characteristics makes the original configuration method no longer applicable, and a new method is required to configure the fuse protection
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[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0026] A configuration method for fuse protection of a 380V distribution network connected to a distributed power supply, the method comprising:
[0027] (1) Construct the network topology model of the 380V low-voltage distribution network;
[0028] (2) Obtain the access mode of the distributed power supply in the network topology model and the maximum load current provided by the distributed power supply; calculate according to the rated power of the distributed power supply. In the step (2), the access modes of the distributed power supply include: direct access and T-connection.
[0029] (3) Determine the fault current of the distributed power supply according to the type of distributed power supply and the rated current of the distributed power supply; in the step (3), the type of distributed power supply includes: ...
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The invention relates to a configuration method for 380V power distribution network fuser protection of an access distributed power supply. The method comprises the following steps: constructing a network topological model of a 380V low-pressure power distribution network; acquiring an access mode of the distributed power supply in the network topological model and maximum load current provided by the distributed power supply; determining failure current of the distributed power supply according to the type of the distributed power supply and rated current of the distributed power supply; defining a rated capacity range for the fuser protection; setting rated capacity for the fuser protection and the protection of superior and subordinate fusers of the fuser. The sensitivity of the fuser protection is greatly improved and the reliability of the fuser protection is enhanced.
Description
technical field [0001] The invention relates to a configuration method, in particular to a configuration method for fuse protection of a 380V low-voltage distribution network connected to a distributed power supply. Background technique [0002] Access to the 380V low-voltage distribution network is an important form of distributed power access, and its specific access methods include direct access and T-connection. The access of distributed power has changed the network topology of the traditional 380V low-voltage distribution network, not only turning the 380V low-voltage distribution network into a multi-terminal power network, but also introducing a large number of distributed power into the 380V low-voltage distribution network. These control strategies will affect the operating characteristics and fault characteristics of the low-voltage distribution network. Different types of distributed power sources have their own fault characteristics. The control characteristics...
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IPC IPC(8): H02H3/08
Inventor 王文焕杨国生李伟王晓阳张志管益斌朱卫平
Owner STATE GRID CORP OF CHINA