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wind solar hybrid controller
solar power generation system
The difference between off-grid and on-grid 2017-09-19 17:52:00

The off-grid generation system consists of solar panels, batteries and charging and discharge controllers and off-grid inverters. The solar energy controller (PV controller and the landscape complementary controller) regulates and controls the energy generated. One party, the adjusted energy is sent to the dc load or ac load, and the excess energy is transferred to the storage battery.


Save, when the electricity cannot meet the load need, the controller will send the battery power to the load. Accumulator charge after full power, the controller must control the battery without being charged. When the battery is stored, the controller controls. The battery is not discharged to protect the battery.


Grid-connected power generation system is the photovoltaic array, wind turbine and fuel cells and other renewable energy generated by the storage. Battery energy storage, through the grid-connected inverter directly into the grid power generation system. Because the power directly into the power grid, eliminating the configuration of the battery, eliminating the battery energy storage and release process, you can make full use of renewable energy issued by the power, reduce energy consumption and reduce system costs. The grid-connected power generation system can use the mains and renewable energy as the local AC load power supply in parallel, reducing the load-sharing rate of the whole system. At the same time, the renewable energy grid-connected system can play a role in peak regulation of the utility grid. Grid-connected power generation system is the development direction of solar energy and wind power generation, which represents the most attractive Emerson, monitoring the problem.


In order to monitor the status and efficiency of the off-grid system, it is necessary to connect a DC table to the DC output of the solar cell array, connect an AC table to the output of the inverter, and monitor and monitor the DC table and AC table The Because the ammeter conversion frequency is relatively high, poor in the software to achieve such a high frequency, the meter box display system accuracy is also different, the data displayed and the meter shows the data are different, so the monitoring display software is only a general estimate.


The grid-connected inverter integrates the RS-485 and Ethernet communication interface, and transmits the data to the computer through the 485/232 converter. The monitoring system can monitor and display the following parameters, and the voltage of the solar cell array Current and current, AC output voltage and current, current power generation, current generation, cumulative power generation, solar radiation, solar panel temperature, ambient temperature and other power plant parameters, and show emission reduction of carbon dioxide and fault status and other data. gee utilization technology in the 21st century.


In the photovoltaic off-grid system and photovoltaic grid-connected system, we from the following aspects of comparison.


The cost of the problem. In the off-grid system to be used in batteries and solar charge and discharge controller, an increase of the cost of the general PV off-grid system is quoted in the solar grid system offer more than 1.5 times. Battery life is generally about 5 years, with the depth of charge and discharge different, the battery life is different. Daily charge and discharge under the conditions of use, the battery life is generally not more than 3-5 years. This is a great investment in the replacement of the battery, but also need regular maintenance, increased workload.


Monitoring the problem. In order to monitor the status and efficiency of the off-grid system, it is necessary to connect a DC table to the DC output of the solar cell array, connect an AC table to the output of the inverter, and monitor and monitor the DC table and AC table The Because the ammeter conversion frequency is relatively high, poor in the software to achieve such a high frequency, the meter box display system accuracy is also different, the data displayed and the meter shows the data are different, so the monitoring display software is only a general estimate. The grid-connected inverter integrates the RS-485 and Ethernet communication interface, and transmits the data to the computer through the 485/232 converter. The monitoring system can monitor and display the following parameters, and the voltage of the solar cell array Current and current, AC output voltage and current, current power generation, current generation, cumulative power generation, solar radiation, solar panel temperature, ambient temperature and other power plant parameters, and show emission reduction of carbon dioxide and fault status and other data.

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