Hybrid power supply system consisting of mains supply network and photovoltaic assembly and control method thereof

A composite power supply and photovoltaic module technology, applied in the field of solar photovoltaic, can solve the problem of ineffective utilization of excess electric energy of photovoltaic arrays, and achieve the effect of effective utilization and system reliability

Inactive Publication Date: 2014-01-08
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] In order to solve the problem that the existing combined power supply system of solar energy and mains power cannot effectively utilize the excess electric energy generated by the phot

Method used

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  • Hybrid power supply system consisting of mains supply network and photovoltaic assembly and control method thereof
  • Hybrid power supply system consisting of mains supply network and photovoltaic assembly and control method thereof
  • Hybrid power supply system consisting of mains supply network and photovoltaic assembly and control method thereof

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Example Embodiment

[0039] The present invention will be described in further detail below with reference to the drawings and embodiments.

[0040] Such as Image 6 Shown is a specific embodiment of the composite power supply system of the present invention. The composite power supply system composed of a mains network and photovoltaic components in this embodiment includes a photovoltaic array and a mains network. The mains network referred to here refers to the 220V AC single-phase mains power grid. The output end of the photovoltaic array is sequentially connected to a single-phase DC / AC converter, a high-frequency transformer, and a rectifier bridge. The sunlight is output as a direct current at the output end after photoelectric conversion by the photovoltaic array, and the direct current signal is converted by a single-phase DC / AC The inverter (namely the inverter) converts to AC, and transforms the high-frequency transformer to form an output that is then rectified by the rectifier bridge. Th...

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Abstract

The invention provides a hybrid power supply system consisting of a mains supply network and a photovoltaic assembly. The hybrid power supply system comprises a photovoltaic array and a mains supply network, wherein the output of the photovoltaic array is connected with a single-phase DC/AC (Direct Current to Alternating Current) converter, a high-frequency transformer and a rectifier bridge in sequence; the mains supply network is connected with a single-phase AC/DCPWM (Alternating Current to Direct Current Pulse Width Modulation) rectifier and a bilateral DC/DC (Direct Current to Direct Current) chopper in sequence; the output end of the rectifier bridge is connected in parallel with the output end of the bilateral DC/DC chopper. The hybrid power supply system has the beneficial effects that best matching of a solar photovoltaic assembly and four working ways of the mains supply is realized, and the aim of fully utilizing solar energy resources is fulfilled. Moreover, via the direct-current power supply output provided by the invention, the system is more reliable, and solar energy is utilized more efficiently.

Description

technical field [0001] The invention belongs to the field of solar photovoltaic technology, and relates to the composite power supply technology of solar photovoltaic power generation and mains power, in particular to a composite power supply system composed of a mains network and solar photovoltaic modules and a control method for the system. Background technique [0002] With the development of society and economy, people's demand for energy is increasing, and non-renewable energy such as fossil energy is becoming increasingly exhausted, and the environmental pollution caused by its use is becoming more and more serious. At the same time, solar energy, which is a clean and renewable energy, has gradually become the focus, and its low-cost, high-efficiency utilization technology has also become a technical research hotspot in the field. There are many ways to utilize solar energy, among which solar photovoltaic power generation is a major and mature technology, the core of ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J1/10H02J9/06
CPCY02B10/72Y02E10/566Y02E10/563Y02B10/70Y02E10/56
Inventor 龙波胡天友李迅波
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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