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Micro-grid (micro-grid, microgrid), also translated as micro-grid, refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, related loads, monitoring, and protection devices. An autonomous system that can realize self-control, protection, and management can operate in conjunction with an external power grid or in isolation. It is an important part of the smart grid.

Microgrid test systemedit

Since you cannot compensate for the parasitic amount in the grid-connected inverter test system, the inverter protection you debug is very likely to be over-frequency and under-frequency protection, rather than anti-islanding automatic protection.

Technical cooperation with National Tsing Hua University in Taiwan, new technologies, new breakthroughs, to meet the identification and testing of various grid-connected inverters, anti-islanding protection tests, factory inspections, and type tests. In the past, to adjust a resonance point, you may need ten minutes or longer, and you could not even adjust to the AC resonance point. Now you only need less than 1 minute to complete the anti-islanding detection of the grid-connected inverter you want to do. This product has RLC automatic loading function. When the accurate loading is in place, the indicator light on the remote PC software will intelligently remind the operator. Create value for users, products are more valuable.

Main functionsedit

1. ABC three-phase resistive loading power, inductive loading power, and capacitive loading power are directly displayed independently, and the symptom of AC resonance point is directly displayed on the panel. After the RLC load is accurately loaded, there will be an indicator light.

2. The minimum standard power of the built-in resistive load, inductive load and capacitive load is 0.01K, the step amplitude is 0.01K, and the load power is continuously adjustable, which can accurately simulate the occurrence of AC resonance and meet the needs of inverter anti-islanding protection function detection .

3. The resistive load adopts alloy resistance elements, and the resistance value thermal drift will not change due to the heating of the resistive load element during the test.

4. The built-in inductance adopts a magnetic circuit type controllable load inductive load element, which meets the 0.01KVA power regulation requirements under the line voltage 400V/50HZ (phase voltage 230V/50Hz) working condition, and meets the long-term load test process. Changes.

5. The built-in capacitor uses standard CBB capacitor elements, which meets the 0.01KVAR power adjustment requirements under the line voltage 400V/50HZ working condition, and meets the long-term load test process. The capacitor impedance power will not change.

6. Each branch of the built-in capacitive load must be equipped with a special protection circuit module for short-circuit protection to prevent the capacitor element from short-circuiting and burning the host during the test process and the moment the loading switch is closed.

7. The power of ABC three-phase resistive load, inductive load, and capacitive load can be independently controlled and adjusted in phases, so as to accurately adjust the AC resonance point under the condition of unbalanced three-phase voltage. Microgrid anti-islanding simulation experiment to detect load

8. According to the performance parameter test requirements, the corresponding power can be set through the remote PC, and the discharge power can be set in any combination.

9. The host adopts electronic circuit control and has an automatic alarm protection function for temperature overheating: when overheating or overcurrent occurs due to special reasons, the load can be automatically cut off. Island detection device

10. The measurement data can be recorded and stored. It is convenient for users to make reports.

11. New type of power consumption components, high power density, no red hot phenomenon, the whole machine is composed of three parts: resistive load, inductive load and capacitive load.

12. The power input is continuously adjustable. The load adopts energy consumption mode, and the heat dissipation adopts forced air cooling mode.

13. The measurement data of the detection process can be recorded and saved to the remote PC (remote control room).

14. Equipped with back-end analysis software, the measurement data can be exported into a test report in EXCLE format.

15. Meet the requirements of grid-connected inverter anti-islanding test, meet DIN VDE0126-1-1 standard test, meet IEC62116-2008 standard test process test requirements, built-in software IEC62116-2008 version built-in test steps (31 times)

16. The RLC power load can be controlled and adjusted on the remote PC software (adjusted on the PC in the control room console, with automatic loading function or manual loading).

17. When the three-phase voltage output of the grid-connected inverter is unbalanced, it can also accurately debug the occurrence of the simulated resonance point, and accurately detect the anti-islanding protection function of the grid-connected inverter.