Municipal complementary solar power supply system, also known as distributed photovoltaic power generation system, specifically refers to the use of photovoltaic modules, the direct conversion of solar energy into electricity distributed power generation system. It is a new type of power generation and comprehensive energy utilization with a broad development prospect. It advocates the principle of power generation, grid connection, conversion and use in the vicinity, which can not only effectively increase the power generation capacity of PV power plants of the same scale, but also effectively solve the problem of power loss in voltage boosting and long-distance transportation.
Composition
Utility complementary solar power supply system consists of solar cell set, solar controller, battery (set). If the output power is AC 220V or 110V and is to be complementary to the utility, it also needs to be equipped with a grid-connected inverter and a utility intelligent switcher.
Classification
1, with counter-current grid-connected photovoltaic power generation system
There is counter-current grid-connected photovoltaic power generation system: when the solar photovoltaic system emits sufficient power, the remaining power can be fed into the public grid to supply power to the grid (sell power); when the solar photovoltaic system provides insufficient power, the power is supplied to the load by the power (buy power). Because the power supply to the grid when the direction of power supply with the grid is opposite, so called counter-current photovoltaic power generation system.
2, no counter-current grid-connected photovoltaic power generation system
No counter-current grid-connected photovoltaic power generation system: solar photovoltaic power generation system even if the generation of abundant power does not supply power to the public grid, but when the solar photovoltaic system power supply is insufficient, the public grid to supply power to the load.
3, switch-type grid-connected photovoltaic power generation system
The so-called switch-type grid-connected photovoltaic power generation system, in fact, has the function of automatic operation of two-way switching. First, when the photovoltaic power generation system due to cloudy, rainy days and their own fault caused by insufficient power generation, switchers can automatically switch to the power supply side of the grid, by the grid to the load power supply; Second, when the grid for some reason actually blackout, photovoltaic system can automatically switch to make the grid and photovoltaic system separation, become independent photovoltaic power generation system working state. Some switchover PV systems can also disconnect the power supply for general loads and connect the power supply for emergency loads when needed. General switch-type grid-connected power generation system with energy storage devices.
4, grid-connected photovoltaic power generation system with energy storage device
Grid-connected photovoltaic power generation system with energy storage device: is in the above-mentioned types of photovoltaic power generation system according to the need to configure energy storage devices. With energy storage device PV system initiative is stronger, when the grid blackout, power restrictions and failure, can be run independently, normal power supply to the load. Therefore, grid-connected photovoltaic power generation systems with energy storage devices can be used as power supply systems for important or emergency loads such as emergency communication power, medical equipment, gas stations, shelter instructions and lighting.
