Grid Stabil

Grid Stabil

Grid Tie Solar Inverters for home system

Grid Tie Solar Inverters for home system

Lattice Tie Inverter for Solar home system

Photovoltaic power generation system, especially the DC system, about solar power sent to the charging battery, and battery power directly to the load, such as Northwest China to use the system solar home lighting more numerous and far from the electricity supply network is a system of microwave station DC. Such systems are simple, low cost, but because the DC load voltage different (eg 12V, 24V, 48V, etc.), it is difficult to achieve standardization and compatibility of systems, especially the civil power, because most of the burden of air-conditioning, power DC power supply Photovoltaic difficult to enter the market as a commodity. In addition, PV power plant will eventually and network operations, which should be a model of a mature market, the exchange of future generation photovoltaic system photovoltaic electric power generation will become mainstream.

Grid Tie Inverter Information:

1. Requires efficiency high. Due to the current high price of solar cells, to maximize the use of solar cells, improving system efficiency, we should try to improve the efficiency of the inverter.

2. Requires high reliability. Photovoltaic power generation system is mainly used in remote areas, many power plants and maintenance without supervision, which require an inverter with a reasonable structure, rigorous selection of components and require an inverter with various protection features such as DC input reverse polarity protection, air conditioning protection output short circuit, overheating and excess protection.

3. DC input voltage necessary to adapt to a wide range, because the load terminal voltage of solar cells and changes in sunlight intensity, even though the battery voltage has an important role in solar cells, but the battery voltage with the remaining battery capacity and internal resistance changes in volatility, especially when the battery terminal voltage varies during aging, such as 12V battery, the terminal voltage can vary between 10V ~ 16V, which requires an inverter that larger with the DC input voltage is guaranteed to work in, and to ensure the stability of the AC output voltage.

4. In medium and large capacity power generation system photovoltaic, inverter output power should be low distortion sine wave. This is due in large capacity systems, the use of square wave power supply, the output will contain more harmonics, harmonic will result in additional losses, a lot of photovoltaic power generation system for communication or instrumentation load this device has high requirements for power quality, between large capacity photovoltaic power generation and network operating system, to avoid pollution of the public electricity network, also called a sine wave inverter output current.

Solar grid inverter works

Inverter into alternating current to direct current, DC voltage, if low, then step through the AC adapter, which is the voltage AC standards and frequencies. Large capacity inverter, because of the high DC bus voltage, AC output is generally no need to step-up transformer is capable of 220V, the inverter capacity of medium and small, due to low DC voltage such as 12V, 24V, should be designed to step-up circuit. Medium and small size generally have a series of push-pull inverter inverter, an inverter bridge management and increasing circuit three high-frequency inverter, push-pull circuit, step-up transformer is connected to the power plug neutral, two alternating electric tubes, electric output by AC, power transistors, taking the total to, drive and a simple control circuit, while the transformer leakage inductance has a certain limit short circuit current, thus increasing circuit reliability. The disadvantage is that the transformer utilization is low, less able to push the inductive load. Full-bridge inverter circuit to address the lack of push-pull circuit, adjust the pulse width output power transistor, the AC RMS voltage output changes. As a series of loop continues to flow, even for inductive load, the output voltage waveform will not distortion. The disadvantage is that the circuit, the next leg power transistor is not common ground, it must be a special set of drivers, or with an isolated power supply. In addition, for prevent the upper and lower leg joint conduction occurs, should be designed to be behind the deadly circuit, which should set the dead time, a more complex circuit structure.

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