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Three-phase voltage phase distinguishing method

A three-phase voltage and phase identification technology, applied in the field of identification, can solve problems such as inability to perform phase-by-phase statistics on power loss, unfavorable power grid energy-saving management, and difficulty in distinguishing

Active Publication Date: 2013-04-24
STATE GRID CORP OF CHINA +4
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Problems solved by technology

[0003] In the existing technology, it is difficult to distinguish which phase line power supply is connected to the user under a certain distribution transformer, and it is impossible to scientifically guide the new power user to connect to which phase power supply under the distribution transformer is more beneficial to the three Phase-to-load balance makes it impossible to calculate the power loss by phase, which is not conducive to energy-saving management of the power grid. At present, there is no product or technology on the market that can quickly and effectively identify the difference in power supply voltage and realize the power supply management of a distribution transformer station area. streamline

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings, but not as a limitation of the present invention.

[0016] Such as figure 1 with figure 2 Shown, a three-phase voltage phase detection method, the method includes the following steps.

[0017] First, a voltage acquisition device is installed at the first end of the power supply line on the low-voltage side of the distribution transformer, phase A, phase B, and phase C, as well as at the location of the detected power consumption. Sampling is performed when each voltage rises to zero, and the sampling time t is recorded.

[0018] Secondly, the reference time of the zero-crossing point of the voltage rise of phase A, phase B and phase C at the head end of the line is t 1 , t 2 , t 3 , the reference time of the zero-crossing point when the phase-detection measurement point voltage rises is t i , get the value of the zero-crossing time of the head end and the...

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Abstract

The invention provides a three-phase voltage phase distinguishing method, wherein voltage collecting devices are installed on an A phrase, a B phrase, a C phrase at a head end of a power supply line on a low-voltage side of a distribution transformer, and electricity-tested places, sampling is conducted when voltages rise over a zero, the referenced moments when voltages of the A phrase, the B phrase and the C phrase rise over the zero are t1, t2 and t3, the referenced moment when a voltage of a phase distinguishing measurement point rises over the zero is ti, the number values of the moments which are over the zero are uploaded to a server and are compared, and when the ti is closest to one of the t1, the t2 or the t3, phrase of the phase distinguishing measurement point can be distinguished. Through the method, number of users and a three-phase power supply balance rate can be counted according to phrases, and a rate of electric energy loss can be counted in a split-phase mode.

Description

technical field [0001] The invention relates to an identification technology, in particular to a method for differentiating voltages of phase identification measurement points in a power supply system. Background technique [0002] At present, with the continuous development of the economy and the continuous expansion of the power supply network, people's refined management of the power supply network, especially which distribution transformer is connected to the user's electricity, which phase line under the connected distribution transformer, a The number of households with three phases under the distribution transformer area, the three-phase load balance, and the statistical requirements for three-phase split-phase power loss are getting higher and higher. [0003] In the existing technology, it is difficult to distinguish which phase line power supply is connected to the user under a certain distribution transformer, and it is impossible to scientifically guide the new p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/18
Inventor 许杏桃张正祥徐小康李然黄文静纪元美高峥嵘
Owner STATE GRID CORP OF CHINA
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