Grid-connected anti-island protection cabinet TC-3087

1, anti-island protection device TC-3087 main function introduction

       Anti-island protection device TC-3087 in addition to the remote closing functions of island trip and island recovery, in the operation of the system, the device constantly monitors the bus voltage and measure the current, and has the alarm function for abnormal current and voltage, the Settings are as follows:

       (1) Overvoltage trip (optional backout)

       (2) Low voltage trip (optional drop back)

       (3) Pressure automatic closing (optional back)

       (4) Over frequency trip (optional back)

       (5) Low frequency trip (optional drop back)

       (6) Instantaneous reverse power discrimination trip (optional backout)

       (7) Isolation protection discrimination.(Optional withdrawal)

       (8) Measurement and control functions: U, I, P, Q, cosΦ, F (requires measurement current and voltage input)

       (9) Optional automatic recovery closing function

2. Function description of anti-island protection device TC-3087

       The normal operation mode of the power supply system of the clean power supply project: a 10kV/400V distribution transformer supplies power normally, while the clean power supply is connected to the grid, and the control requirements are as follows:

       (1) If the current value of the measuring point is too high and crosses the line (by setting parameters), the anti-island protection device TC-3087 will send alarm information on the LCD display, and the alarm information can be uploaded through communication。

       (2) Real-time detection of AC power grid (AC380V, 50Hz) power supply circuit three-phase voltage, current (measuring point), to determine the power flow direction and power size。If there is a voltage on the system side during the initial power-on process of the device, and it is greater than the voltage setting value, the device is powered on automatically. In addition, after a low voltage trip occurs, the device can automatically determine that there is a voltage recovery closing function without losing power.

       (3) The anti-island protection device is equipped with overvoltage protection trip, low current protection trip, high frequency protection trip, low frequency protection trip, instantaneous reverse power discrimination trip, to prevent the island phenomenon caused by the impact on the system grid and equipment damage。