Dynamic simulation system for small current grounding of power distribution network and modeling method of dynamic simulation system

A technology of small current grounding and dynamic simulation, which is applied in the direction of fault location and fault detection according to the conductor type, and can solve the problem that the point grounding method is not flexible and changeable

Inactive Publication Date: 2018-06-29
SHANGHAI WISCOM SUNEST ELECTRIC POWER TECH
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a small current grounding dynamic simulation system of distribution network and its modelin

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  • Dynamic simulation system for small current grounding of power distribution network and modeling method of dynamic simulation system
  • Dynamic simulation system for small current grounding of power distribution network and modeling method of dynamic simulation system
  • Dynamic simulation system for small current grounding of power distribution network and modeling method of dynamic simulation system

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[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar popularizations without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation disclosed below.

[0056] See figure 1 In one embodiment, the low-current grounding dynamic simulation system of the distribution network may include: a power supply simulation unit, a line simulation unit, a fault simulation unit 3, a grounding unit 4, and a controller. Of course, it may also incl...

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Abstract

The invention provides a dynamic simulation system for small current grounding of a power distribution network and a modeling method of the dynamic simulation system. The system comprises a power simulation unit, a circuit simulation unit, a fault simulation unit, a grounding unit and a controller, wherein an output end of the power simulation unit provides a power signal of the system; the circuit simulation unit is connected with the power simulation unit and used for simulating circuits of the power distribution network; the fault simulation unit is connected with the circuit simulation unit and used for simulating ground faults of the system; the grounding unit is connected with the output end of the power simulation unit; the grounding unit forms a neutral point in the position wherethe grounding unit and the output end of the power simulation unit are connected, the neutral point is connected with different grounding structures through a connection/disconnection device, and theconnection/disconnection device is controlled by the controller to connect or disconnect, so that different grounding manners are constructed. The problem that the neutral point grounding manner of the current dynamic simulation system for the power distribution network is not flexible is solved at least.

Description

technical field [0001] The invention relates to the technical field of simulation of a small current grounding system of a distribution network, in particular to a dynamic simulation system for a small current grounding of a distribution network and a modeling method thereof. Background technique [0002] In recent years, as users have higher and higher requirements for the reliability of distribution network power supply, fault indicators have been widely used in distribution network, and the research on small current ground fault identification and line selection technology has been pushed to a higher level. . When a single-phase ground fault occurs in a small-current grounding system, its zero-sequence current is mainly the ground-to-ground capacitive current of the system, and the magnitude of this current is related to the system scale, and its value may be very small. Therefore, the characteristics of a single-phase ground fault in a small-current grounding system are ...

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 王科龙凌万水范志杰王争
Owner SHANGHAI WISCOM SUNEST ELECTRIC POWER TECH
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