A new energy power generation and power supply system based on a multi-power intelligent distributor

Abstract

The invention belongs to the field of new energy power, and particularly relates to a structure of a new energy power generation and supply system based on a multi-power intelligent tuner. Through the structure that a photovoltaic module array is directly connected with the intelligent tuner, compared with a scheme in the prior art, the structure saves an external grid-connected inverter device, a photovoltaic controller and an external direct-current parallel-connection control device, reduces heavy investment, and simplifies system design, system integration and installation engineering quantity. Due to the fact that a multi-storage battery system structure is adopted, in the off-grid environment, power supply of photovoltaic power and power storage of the photovoltaic power can be performed at the same time; in the grid-connected environment, power supply of the photovoltaic power and grid feedback of the photovoltaic power can be performed at the same time, waste of the photovoltaic power is avoided, and the utilization rate of the photovoltaic power is optimized and improved to the maximum degree. Due to the fact that an alternating-current bus and an alternating-current tuning module and meanwhile a direct-current bus and a direct-current tuning module are arranged, the system is made to form a controllable multi-power path so as to enable the system to well achieve that power generation and a load are combined together; the photovoltaic power is directly supplied to the load, and the photovoltaic power is used once the photovoltaic power is generated; charge-discharge amount, a charge step and a discharge step are reduced; the photovoltaic power is consumed and shared in the neighborhood, and the power transmission step and the power conversion step are reduced; a power electronic technology is used for performing automation control, power utilization structures and power utilization modes are optimized, and power utilization cost is saved.

Description

technical field [0001] The invention belongs to the field of new energy electric power, and in particular relates to a new energy power generation and power supply system based on a multi-power intelligent distributor. Background technique [0002] At present, governments around the world are attaching great importance to and vigorously developing new energy power. Its strategic significance is well known. The development of photovoltaic power is an important part of new energy power. The advantage of photovoltaic power is that photovoltaics are everywhere, inexhaustible, clean and environmentally friendly; the disadvantages of photovoltaic power are instability and intermittency. When directly supplying power to the load, it usually cannot meet the demand for stable power consumption of the load. Moreover, its energy density is low, the distribution range is wide, the investment in centralized power supply is large, and the efficiency of power generation and power supply is...

AI Technical Summary

Problems solved by technology

[0005] The schematic block diagram of the system structure and functional principle of the prior art is as follows: figure 2 As shown, when using photovoltaic power supply, it is necessary to add grid-connected inverters or photovoltaic controllers and external DC parallel control devices, which increases a lot of investment

[0006] In addition, adding a grid-connected inverter to convert photovoltaic power into AC power is a traditional grid-connected inverter technology; the disadvantage is that when there is no AC power input, the photovoltaic power generation system cannot feed power, even if the sun is sufficient, the module board Power generation, the system cannot feed power to the load, and the photovoltaic power supply system composed of bidirectional inverters cannot be used independently off the grid

[0007] The existing technical scheme adopts a single battery pack connection, affected by the instability of photovoltaic power and the uncertainty of user load power consumption, the charge and discharge alternate frequently, are not controlled by the system, and cannot complete the due reasonable charge and discharge process, which seriously affects the battery life

[0008] Moreover, battery power is one of the main ways to stabilize photovoltaic power supply. Its power source is best obtained from photovoltaic surplus electricity storage. The photovoltaic power for AC is then converted back to DC power for storage. Since the photovoltaic power is first converted to AC, it must be converted to DC when charging and storing the battery. Such two conversions not only increase the investment in grid-connected inverter equipment cost, also increases the photovoltaic power loss by more than 10%

[0009] Because the existing technologies and solutions work in the AC mode, they can only be icing on the cake, and cannot help in a timely manner, that is, when the power grid (or AC power supply has the ability to supply electricity, its external photovoltaic grid-connected power generation device starts to supply power; When the power supply is cut off (at this time, it may be when the user needs electricity more), even if the photovoltaic power generation can generate electricity at this time, it will refuse to supply power due to the power failure of the original AC power supply, and the generated photovoltaic power will be wasted in vain.

[0010] In addition, if the grid is used as an AC power source, it needs to be approved by the power department that owns the grid to be connected to the grid, and users cannot connect to the grid by themselves, and the grid itself will have strict requirements and restrictions on grid connection due to limitations in technology and power system capabilities. Will greatly restrict users of prior art systems

[0011] Aiming at the defects of the existing technology and fully combining the characteristics of photovoltaic power, unstable new energy power and storage power supply, the present invention proposes a new energy power technology based on a new energy power generation and power supply system based on a multi-power intelligent adjuster Program

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