Device and method for measuring tide directions of photovoltaic grid-connected power generation and commercial power
A technology of tidal current direction and measuring device, which is applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problem that the staff cannot clearly see the power supply status, grid connection and mains power affect the grid connection test process, and photovoltaic grid connection power generation Project progress, difficult to understand photovoltaic grid-connected power generation and other issues, to achieve the effect of convenient operation and judgment, high practicability, and reduced error rate
Inactive Publication Date: 2013-05-01
SHANGHAI NAJIE COMPLETE SETAB OF ELECTRIC
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Problems solved by technology
In the existing grid-connected system, the staff cannot clearly see the specific power supply status after the photovoltaic grid-connected power generation system and the mains are connected to the grid, that is, it is difficult to know whether the photovoltaic grid-connected power generation is supplying power to the load or the mains is supplying power to the load , especially during the grid-connected test, the inability to show the direction of the grid-connected and mains power will greatly affect the progress of the grid-connected test and the progress of the photovoltaic grid-connected power generation project
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[0028] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0029] The present invention comprises transformer TA0, TA1, TB0, TB1, TC0, TC1 arranged in the three-phase circuit, and single-chip microcomputer 40, such as figure 1 with figure 2 As shown, the three-phase circuit is divided into three phases A, B, and C. The A, B, and C three-phase circuits are installed at 120°. The outer side is the grid-connected side 100 connected to the photovoltaic grid, and the inner side is connected to the mains. The mains side 200 of the grid-connected side 100 and the mains side 200 is the load side 50 connected to the electric load. In the A-phase circuit, the grid-connected side 100 is connected to the load side 50 through the transformer TA0, and the mains side 200 is connected to the load side through the trans...
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The invention discloses a device and a method for measuring the tide directions of photovoltaic grid-connected power generation and commercial power. The device is arranged on a three-phase circuit; a first mutual inductor and a second mutual inductor for sampling the magnitude and direction of current are arranged between a grid-connected side and a load side as well as between a commercial power side and the load side respectively; the measuring device comprises a singlechip microcomputer; the singlechip microcomputer is provided with a sampling interface; the first and second mutual inductors are connected with the sampling interface respectively; and the singlechip microcomputer is used for processing current information sampled by using the sampling interface and displaying through a display device. The device and the method have the beneficial effects that the tide directions of photovoltaic grid-connected power generation and commercial power supply can be judged intuitively, the power source information of a power using load at a certain moment can be obtained instantaneously, real-time current data are displayed through the display device, relevant personnel can operate and judge conveniently, the working efficiency is effectively increased, the error rate is lowered, high practicability is realized.
Description
technical field [0001] The invention relates to an electric power measurement device, in particular to a photovoltaic grid-connected power generation and mains power flow direction measurement device and method. Background technique [0002] At present, grid-connected photovoltaics are often connected to grid-connected grids, becoming one of the main sources of electricity in various fields. In the existing grid-connected system, the staff cannot clearly see the specific power supply status after the photovoltaic grid-connected power generation system and the mains are connected to the grid, that is, it is difficult to know whether the photovoltaic grid-connected power generation is supplying power to the load or the mains is supplying power to the load , especially in the grid-connected test process, the failure to show the grid-connected and mains power flow direction will greatly affect the progress of the grid-connected test and the progress of the photovoltaic grid-conn...
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IPC IPC(8): G01R31/00G01R19/25
Inventor 张超
Owner SHANGHAI NAJIE COMPLETE SETAB OF ELECTRIC