CN204810198U - Distributing type DC power supply based on solar photovoltaic power generation system - Google Patents

Abstract

The utility model relates to a distributing type DC power supply based on solar photovoltaic power generation system, its characterized in that includes solar cell module, and circuit module, singlechip circuit module, relay circuit module, the circuit module that charges, battery module, the circuit module that steps up, rectification circuit module are kept apart in buck step -down circuit module, optical coupling. The utility model discloses a solar photovoltaic power generation system's distributed dc circuit, the electricity generation mode under the different environment condition is selected through controlling the work of different relay circuit in introducing traditional distributed generator system to the data acquisition control technique that wherein constitutes the singlechip: the system produces the energy through photovoltaic power generation system and supplies load work when having illumination, when not having illumination, produce the energy through commercial power hardware electrical power generating system and supply load work, when not having illumination and commercial power, the energy of storing the battery through the booster system steps up into the required energy of load work. With this utilization ratio that reduces grid voltage, energy saving loss. In quoting traditional distributed generator with the green resource of solar energy, the energy saving has been realized, the problem of high conversion efficiency. The utility model provides a performance safety, the digital distributed generator of intelligence.

Description

A distributed DC power supply based on solar photovoltaic power generation system

technical field

The utility model belongs to the field of intelligent distributed power supply and relates to a distributed direct current power supply based on a solar photovoltaic power generation system.

Background technique

With the wide application of communication products in the field of new energy and numerical control systems. Power electronic devices have begun to develop more in the direction of complexity, digitization, and intelligence. One of the overall development trends in power technology is the modular distributed power system. The traditional distributed power supply uses the front-stage AC-DC module to convert the grid voltage into a specified DC voltage to form a DC bus voltage, and then transmits the formed constant driving voltage to the DC-DC module on the subsequent load to complete the entire process. The function of driving circuit constant voltage and constant current. This control method has always been used to convert the grid voltage into the voltage required by the product, which consumes a lot of energy. The current power crisis and large-scale power outages have exposed the "centralized power generation" mode of the traditional single power supply system. When the power grid suddenly fails, large-scale power system equipment will be paralyzed, causing huge economic losses, and the safety is not high. Single dependence on grid power generation mode can no longer meet the development requirements of modern digital intelligent multi-function control system. This paper introduces the data acquisition and control technology composed of single-chip microcomputer into the traditional distributed power supply system, and selects the power generation mode under different environmental conditions by controlling the on-off circuits of different relays: when the system is illuminated, the photovoltaic power generation system generates energy for the load Work; when there is no light, the mains hardware power system generates energy for the load to work; when there is no light and mains power, the energy stored in the battery is boosted into the energy required for the load to work through the booster system. In this way, the utilization rate of the grid voltage is reduced and energy loss is saved. Therefore, it is imperative to design a DC distributed system power supply with high efficiency, safety, stability and low power consumption.

Contents of the invention

The purpose of this utility model is to solve the shortcomings of traditional distributed power supply equipment, such as large energy consumption and unsafety, by controlling different relay on-off circuits to select power generation modes under different environmental conditions, and to introduce solar energy green resources to traditional distributed power supply equipment. In the power supply, the problems of energy saving and high conversion efficiency are realized. A distributed power supply with safe performance and intelligent digitalization is provided. The technical scheme that the utility model solves the technical problem that takes is as follows:

The utility model comprises a solar cell module, a Buck step-down circuit module, an optical coupling isolation circuit module, a single-chip microcomputer circuit module, a relay circuit module, a charging circuit module, a storage battery module, a boosting circuit module and a rectifying circuit module.

The output terminal of the solar cell is connected to the input terminal of the Buck step-down circuit module, the input terminal of the optical coupling isolation circuit module is connected to the output terminal of the Buck step-down circuit module, and the input terminal of the single-chip microcomputer control circuit module is connected to the output of the optical coupling isolation circuit module terminal, the input terminal of the charging circuit module is connected to the output terminal of the relay module 9, the input terminal of the relay circuit module 5 is connected to the output terminal of the charging circuit module, the input terminal of the storage battery module is connected to the input terminal of the Buck step-down circuit, and the output terminal of the storage battery module Connect to the relay circuit module 6, the input terminal of the boost circuit module is connected to the output terminal of the relay circuit module 6, the input terminal of the rectifier circuit module is connected to the output terminal of the relay module 9, and the output terminal of the boost circuit module is connected to the input terminal of the load.

Compared with the prior art, the utility model has the following beneficial effects: the equipment mainly solves the problem of large energy consumption in the traditional distributed power supply equipment by integrating the distributed power supply equipment of the solar photovoltaic power generation system, the mains power generation system and the step-up hardware system. Unsafe and other shortcomings, by controlling different relay on-off circuits to select power generation modes under different environmental conditions, introducing solar green resources into traditional distributed power sources, realizing energy saving and high conversion efficiency. A distributed power supply with safe performance and intelligent digitalization is provided.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, a distributed DC power supply based on a solar photovoltaic power generation system is characterized in that it includes a solar cell module 1, a Buck step-down circuit module 2, an optical coupling isolation circuit module 3, a single-chip microcomputer control circuit module 4, and a relay circuit Module 5 , relay circuit module 6 , charging circuit module 7 , battery module 8 , relay circuit module 9 , boost circuit module 10 , and rectifier circuit module 11 .

The specific working process of the device is: when there is sunlight, the solar cell converts the solar energy into direct current through the photovoltaic effect, and a part of the buck step-down circuit generates 220V voltage for the load to work normally, and the other part generates 12V low direct current voltage for the battery at the same time Charging, while detecting whether the solar cell is working through the optical coupling isolation circuit. When there is no sunlight, the single-chip microcomputer control circuit will control the relay 6 to be turned on, and the 12V voltage will be raised to 220V for the normal working voltage of the load through the booster circuit; at the same time, the current voltage of the battery will be displayed on the LED digital tube of the single-chip microcomputer circuit. At this time, the battery voltage will gradually decrease because the voltage stored in the discharge state will gradually decrease. When the voltage decreases to the preset threshold voltage, the single-chip microcomputer system will turn on the relay circuit 9 and disconnect the relay circuit 6 at the same time. The connected grid voltage outputs 220V DC voltage through the rectifier circuit to supply the normal working voltage of the load, and the single-chip microcomputer system connects the relay circuit 5 to charge the storage battery. Feedback the sampling voltage to the MCU program system, and display the charging voltage value of the battery on the LED digital tube. When the battery is fully charged, the program system controls to turn on the relay circuit 6 and disconnect the relay circuit 9, and the charging function state of the battery circuit will be transformed into The functional status of the boost circuit. At this time, the battery will discharge and convert the 12V voltage to the voltage required for the normal operation of the 220V load through the booster circuit. Repeating this cycle, the single-chip microcomputer system will control different power generation modes by controlling the on-off of different relay circuits according to different environmental factors: when the city power grid is out of power, the photovoltaic system can be used to generate power; When neither the solar energy nor the grid system can generate electricity, the storage capacity and working quantity of the battery can be directly controlled to generate a normal working voltage for the load through a booster circuit.

Claims (1)

1. the distributed DC power based on solar photovoltaic generation system, it is characterized in that comprising solar module, Buck reduction voltage circuit module, optical coupling buffer circuit module, single chip circuit module, relay circuit module, charging circuit module, battery module, booster circuit module, rectification circuit module;

Described solar cell exports the input of termination Buck reduction voltage circuit module, the output of the input termination Buck reduction voltage circuit module of optical coupling buffer circuit module, the output of the input termination optical coupling buffer circuit module of single chip machine controlling circuit module, the output of the input contact relay module 9 of charging circuit module, the output of the input termination charging circuit module of relay circuit module 5, the input of the input termination Buck reduction voltage circuit of battery module, the output contact relay circuit module 6 of battery module, the output of the input contact relay circuit module 6 of booster circuit module, the output of the input contact relay module 9 of rectification circuit module, the input of the output terminating load of booster circuit module.