UPS efficiency solar inverter

UPS efficiency solar inverter
The purpose is to provide safe isolation and power grid at night and fault isolation in the event. The second structure is non-isolated solutions. Wherein, DC voltage of AC voltage output from the boost stage directly. The third innovation topology structure of the high frequency online ups switch and the power diode, and AC to boost production section of functional integration in a special topology, although the conversion efficiency of solar panels is very low, so that the efficiency of the inverter as possible close to 100% is very important. In Germany, mounted on a south-facing roof of 3kW series module with an estimated annual generation 2550 kWh. If the inverter efficiency from 95% to 96% more than a year will be able to generate electricity 25kWh. The use of additional solar module generates this 25kWh costs associated with increased quite an inverter. Because efficiency from 95% to 96% so that the inverter will not double the cost, so the more efficient inverter investment is the inevitable choice. Emerging designs in the most cost-effective way to improve the efficiency of the inverter is a critical design criteria. As for the reliability and cost of the inverter are two other design criteria. Higher efficiency can reduce the temperature fluctuation on the duty cycle, thereby improving reliability, and therefore, these criteria are actually associated with. Use module will improve reliability.

UPS Function

UPS Function
The inverter only has straight AC conversion function, also has a maximum limit to carry forward the usefulness and functionality of the solar system maintenance function problems. Summed up the initiative to stop the operation and function of the maximum pure sine wave online ups point tracking control function, anti-alone operation function (and network systems), active voltage regulation function (and network systems), DC detection function (and network systems), the DC ground fault detection function (and network systems). Here brief introductions active operation and shutdown function and maximum power point tracking control function.
An initiative to stop the operation and function of the morning after sunrise, solar radiation intensity gradually strengthen, the output of solar cells also increased, when the tasks required to reach the inverter output power, the initiative to start the operation of the inverter. After entering operation, the inverter output will be at all times the solar cell module custody, only the output power of the solar cell module is greater than the inverter output Offline ups required for the task, the inverter will continue to operate; stop until sunset, even rainy days inverter can operate. When the output of solar modules become smaller, the inverter output is close to 0, the inverter will constitute standby mode.
2, the maximum power output of the solar tracking control function module is included with the intensity of solar radiation and the solar cell module itself temperature (chip temperature) and change. Else because the solar cell module having a voltage drop with the increase of the current characteristics, and thus be able to obtain the best task exists the maximum power point. Changes in the intensity of solar radiation is obviously the best task point is also in transition. Related to these changes, the task has been to make solar modules at maximum power point point, the system always get the maximum power output from the solar components, such restraint is the maximum power point tracking control. Most important feature of solar power inverter system that covers the use of the maximum power point tracking (MPPT) in this

 

UPS is a multi-string inverter to take the advantages of centralized inverters

UPS is a multi-string inverter to take the advantages of centralized inverters and string inverters, to avoid its shortcomings, can be applied to a few kilowatts of photovoltaic power stations. In the multi-string inverters contain different individual peak online offline upstracking and dc-to-dc converter, which through a common DC DC to AC inverter into alternating current, grid to grid. PV strings of different ratings (eg: different power ratings, each string a different number of components, the components of different manufacturers, etc.), different sizes or different techniques of PV modules, strings in different directions (eg : East, South and West), a different inclination or shading, can be attached to a common inverter, while each string are working in their respective maximum peak power on. Meanwhile, the length of the DC cable to reduce the impact of shading between the strings and the loss due to differences between the strings caused minimized.

 

UPS systems are generally used for large-scale centralized inverter

UPS systems are generally used for large-scale centralized inverter PV power plant (> 10kW), the number of parallel PV strings are connected
To the same central inverter DC input Outdoor cabinet of the general three-phase IGBT power module, use less power field effect transistor, using DSP switch controller to improve the quality of the output power, making it very close to sinusoidal current. The maximum power of the system is characterized by high and low cost. But the influence of PV string matching and partial shading, resulting in efficiency and power capacity of the entire PV system. At the same time the entire photovoltaic computer ups power supply generation system reliability by poor working conditions of a photovoltaic cell groups affected. The latest research is the use of space vector modulation control, as well as the development of new inverter topology of connections to achieve high efficiency under partial load conditions. On SolarMax (Shohreh Mike) central inverter, you can attach an interface box PV array, photovoltaic panels on each string string monitoring, such as a string which is not working properly, the system will put the information passed to the remote controller, and can be stopped by a bunch of these remote control, so as not to because of the failure of a string of PV strings and impact of the work and reduce the energy output of the entire PV system

UPS inverter power in the case of access to electricity

UPS inverter power in the case of access to electricity, and every time you open UPS, we heard the sound of the relay repetitive movements, UPS panel, low battery voltage indicator is lit and the buzzer sounding.
According to the above symptoms can be judged: the failure is caused by the battery voltage is too low, leading to an unsuccessful start caused by Home inverter ups. Remove the battery, the first for a balanced charge (charging all batteries in parallel), if we do not succeed, then only replace the batteries.
6, open the mains power supply is normal UPS, inverter operation indicator flashes, the buzzer sounds intermittently,high frequency online ups inverter can only work in the state, can not be converted to electricity working condition.
Failure Analysis: power inverter can not be converted to electricity supply, indicating that the inverter power supply fails to convert part of the electricity supply, we should focus on testing:
- Mains input fuse is damaged;
- If the mains input fuse is good, check the mains rectifier filter circuit output is normal;
- If the mains rectifier filter circuit output is normal, check the mains detection circuit is normal;
- If the mains detection circuit is normal, and then check the inverter power supply is normal to the mains power switch control output.

UPS inverter power stage one pair amplifier transistor is damaged

UPS inverter power stage one pair amplifier transistor is damaged, replace the same type of transistor after running for some time because they burn too much current, caused by excessive current reasons:
- Overcurrent failure. When the inverter output overcurrent, the overcurrent protection circuit does not work;
- Pulse Width Modulation (PWM) component failure, the two complementary output waveform asymmetry, a long lead-time, on-time and short the other, so that the work of unbalanced arms, even the arms are turned on simultaneously, resulting in two tube is damaged;
- Solar panel inverter difference between the larger tube parameters, then even if the input waveform symmetry, the output will be asymmetrical, the waveform is output transformer, causing magnetic bias, ie the flux imbalance, leading to the accumulation of down transformer saturation current surge, burn computer ups power supply tube, and a burn, the other also will burn.
4, after UPS boot, no display on the panel, UPS does not work.
Failure Analysis: From Symptom judgment, the failure in the mains input, battery and mains detection portion and the battery voltage detection circuit:
- Check the mains input fuse is burned;
- If the mains input fuse is good, check the battery insurance burned, because some UPS when the battery voltage is less than the self-test, all of the output of the UPS and the display will be closed;
- If the battery insurance intact, check the mains detection circuit is working properly, if the mains detection circuit is not working properly and the UPS does not have no electricity start function, UPS also will shut down all output and display.
- If the city detection circuit is working properly, then check the battery voltage detection circuit is normal.

 

Working UPS battery voltage is low

Working industrial ups power supply battery voltage is low, but start charging more than 10 hours of battery charge voltage is still not up.
Failure Analysis: Phenomenon judged from the battery or charging circuit failure, according to the following steps to check:
- Check the charging circuit input and output voltage is normal;
- If the charging circuit input is normal, the output is not normal, disconnect the battery
Then measured, if not normal, compared with the charging circuit fault;
- After disconnecting the battery charging circuit if the input and output are normal, then the battery is not charged due to long-term, over-discharge or other reasons, to the life of the damage.