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Low-voltage distribution network time synchronization method

A low-voltage power distribution network, time synchronization technology, applied in the field of low-voltage power distribution, can solve the problems of difficult time delay, inability to achieve accurate time synchronization, building signal shielding, etc., to achieve accurate time synchronization, easy identification and processing, low cost effect

Active Publication Date: 2020-09-22
SHANDONG KEHUI POWER AUTOMATION +1
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Problems solved by technology

The low-voltage power distribution Internet of Things usually uses wireless communication and HPLC broadband carrier communication. The time delay of these two communication methods is difficult to determine, and accurate time synchronization cannot be achieved. Satellite synchronization methods such as GPS can be used to achieve accurate time synchronization, but the cost is high and Signal shielding in buildings makes it difficult to popularize and apply

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  • Low-voltage distribution network time synchronization method
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  • Low-voltage distribution network time synchronization method

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Embodiment Construction

[0049] Figure 1~5 It is the best embodiment of the present invention, below in conjunction with attached Figure 1~5 The present invention will be further described.

[0050] Such as figure 1 Shown: a low-voltage distribution network time synchronization method, including the following steps:

[0051] Step 1) Classify the low-voltage distribution network along the transmission direction. The terminal from each transformer terminal or detection terminal to its outgoing line is one level, and the outgoing line of each distribution transformer is divided into several groups, and the low-voltage distribution network The number of stages is less than or equal to 10, and the number of time slots in each stage is less than or equal to 5;

[0052] Time synchronization needs to know the network topology of the low-voltage system, and divide the low-voltage distribution network level according to the topology. Usually, the terminal at the distribution transformer (fused terminal or...

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Abstract

A low-voltage power distribution network time synchronization method belongs to the technical field of low-voltage power distribution. The method is characterized by comprising the following steps: 1)grading a low-voltage power distribution network in a power transmission direction; 2) injecting a time synchronization characteristic pulse signal into a root node intelligent terminal P of the first-stage low-voltage power distribution network, and receiving the time synchronization characteristic pulse signal at each group of P1-Pn of the first-stage low-voltage power distribution network to complete first-stage in-stage time synchronization; 3) respectively injecting time synchronization characteristic pulse signals into each group of P1-Pn of the first-stage low-voltage power distribution network, and receiving the signals at the sub-node intelligent terminal Q connected with the second-stage low-voltage power distribution network in the second-stage low-voltage power distribution network to finish inter-stage time synchronization; and 4), sequentially completing intra-stage time synchronization and inter-stage time synchronization of two adjacent stages of low-voltage power distribution networks on each stage of low-voltage power distribution network in the power transmission direction. The low-voltage power distribution network time synchronization method guarantees accurate time synchronization, and is low in cost, high in reliability, simple, easy to implement and convenient to use and popularize.

Description

technical field [0001] The invention discloses a time synchronization method for a low-voltage power distribution network, which belongs to the technical field of low-voltage power distribution. Background technique [0002] Low-voltage distribution network time synchronization is a supporting technology for many applications such as fault detection and instantaneous line loss. For a long time, there is a lack of a simple and reliable time synchronization method. The low-voltage power distribution Internet of Things usually uses wireless communication and HPLC broadband carrier communication. The time delay of these two communication methods is difficult to determine, and accurate time synchronization cannot be achieved. Satellite synchronization methods such as GPS can be used to achieve accurate time synchronization, but the cost is high and Signals are shielded in buildings, making it difficult to popularize and apply. Contents of the invention [0003] The technical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638Y04S40/126
Inventor 徐丙垠王敬华方善忠陈文钢李胜祥
Owner SHANDONG KEHUI POWER AUTOMATION
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