Anti-islanding protection testing circuit and method based on constant impedance load simulation
A technology of constant impedance load and test circuit, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., which can solve the problem that the shape of the device is too large, the feedback energy cannot be realized, and the anti-islanding protection test of grid-connected photovoltaic inverters can be carried out. problem, to achieve the effect of compact device shape, quick splicing, and easy anti-islanding protection test work.
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] Referring to Figure 1, the present invention provides an anti-islanding protection test circuit based on constant impedance load simulation, the test circuit includes a constant impedance load simulation unit, a monitoring unit and a measurement unit; the first input terminal of the measurement unit is connected to the grid-connected photovoltaic The output of the inverter; the second input terminal of the measurement unit is connected to the first output terminal of the monitoring unit; the first output terminal of the measurement unit is connected to the constant impedance load simulation unit; the constant impedance load simulation The first output of the unit is connected to the distribution network; the second output of the constant impedance load simulation unit is connected to the second input of the monitoring unit; the bypass swi...
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