Inverter The System Is More Stable, More Secure, More Effective

The inverter is the process of converting AC power into DC power. It is called rectifier, and the circuit that completes the rectification function is called rectifier circuit. The device that realizes the rectification process is called rectifier or rectifier. Correspondingly, the process of converting DC power into AC power is called an inverter. The circuit that performs the inverter function is called an inverter circuit, and the device that realizes the inverter process is called an inverter device or an inverter.

The direct function of the inverter is to convert the DC power into AC power, the core of the inverter device is the inverter switch circuit, referred to as the inverter circuit. The circuit through the power electronic switch on and off, to complete the inverter function. Power electronic switching devices on and off, the need for a certain drive pulse, these pulses may be changed by a voltage signal to adjust. Generate and adjust the pulse of the circuit. Often referred to as a control circuit or a control loop. In addition to the above-mentioned inverter circuit and control circuit, there are protection circuit, output circuit, input circuit, output circuit and so on.

Inverter as the core of photovoltaic power plant, the main role is to PV modules irregular DC, converted to sine wave AC, as well as overvoltage, overcurrent protection, insulation impedance protection, leakage current protection, grid voltage frequency protection Features. With the PV module price reduction and efficiency, photovoltaic parity online time getting closer, PV began approaching tens of thousands of households, people also hope that the inverter can play a more important role in the system, the PV system more stable , More secure, more effective.

Inverter, also known as power regulator, according to the inverter in the use of photovoltaic power generation system can be divided into two kinds of independent power supply and grid. Inverter is a kind of semiconductor device composed of power adjustment device, mainly used for DC power into AC power. Generally consists of boost circuit and inverter bridge circuit. The boost circuit boosts the DC voltage of the solar cell to the DC voltage required for the inverter output control. The inverter bridge circuit converts the boosted DC voltage to the AC voltage of the common frequency.

Inverter installation and maintenance of the Notes

1, before the installation should first check whether the inverter in the transport process for damage.

2, in the choice of installation site, it should ensure that there is no interference within the other power electronic equipment.

3, before the electrical connection, be sure to use opaque material to cover or disconnect the photovoltaic panel DC side of the circuit breaker. Exposure to sunlight, photovoltaic arrays will produce dangerous voltages.

4, all installation operations must be done only by professional and technical personnel.

5, the photovoltaic power generation system used in the cable must be connected firmly, good insulation and specifications appropriate.

6, all electrical installation must meet the local and national electrical standards.

7, when the local power sector permission by the professional and technical personnel to complete all the electrical connection before the inverter can be connected.

8, before any maintenance work, should first disconnect the inverter and the electrical connection of the grid, and then disconnect the DC side electrical connection.

9, wait at least 5 minutes until the internal components can be discharged before the maintenance work.

10, any failure that affects the safety performance of the inverter must be immediately removed before turning on the inverter again.

11, to avoid unnecessary circuit board contact.

12, to comply with static protection specifications, wearing anti-static bracelet.

13. Observe and follow the warning signs on the product.

14, the initial operation before the visual inspection equipment for damage or other dangerous state.

15, pay attention to the inverter hot surface. Such as power semiconductor heat sink, etc., in the inverter power after a period of time, still maintain a high temperature.