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Single-stage boosting/reducing energy storage type photovoltaic grid-connected power generation control system

A control system and energy storage battery technology, applied in photovoltaic power generation, single-network parallel feeding arrangement, energy storage, etc., can solve the problems of increased hardware costs, control complexity, and reduced efficiency, so as to improve power supply quality and reduce complexity Sex and cost, and the effect of improving power grid quality

Inactive Publication Date: 2012-12-12
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, existing solutions are based on traditional single-stage or two-stage power converters, which have their own shortcomings; in order to effectively manage the charging and discharging of energy storage batteries, an additional bidirectional DC / DC converter is introduced, which increases hardware costs and control costs. complexity, efficiency will decrease

Method used

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  • Single-stage boosting/reducing energy storage type photovoltaic grid-connected power generation control system
  • Single-stage boosting/reducing energy storage type photovoltaic grid-connected power generation control system
  • Single-stage boosting/reducing energy storage type photovoltaic grid-connected power generation control system

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Embodiment Construction

[0036] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Such as figure 2 As shown, a single-stage step-up / step-down energy storage type photovoltaic grid-connected power generation control system of the present invention includes: an energy storage battery charge and discharge management unit, a maximum power tracking and limit control unit, a photovoltaic battery power calculation unit, and a regulator , feedforward control unit, power closed-loop control unit, inverter output active and reactive power calculation unit, d-q axis voltage and current component calculation unit, three-phase voltage and current measurement unit, d-q axis current closed-loop control unit, SPWM modulation unit, Energy storage type power conversion main circuit, energy storage battery voltage and cur...

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Abstract

The invention discloses a single-stage boosting / reducing energy storage type photovoltaic grid-connected power generation control system, which comprises an energy storage type power conversion main circuit and a control system which are connected mutually. The energy storage type power conversion main circuit comprises a photovoltaic cell, an inductance and capacitance circuit network, an energystorage cell and a three-phase inverter which are connected mutually; and the control system is used for performing charging and discharging management on the energy storage cell, maximum power tracking and threshold control on the photovoltaic cell and closed-loop control on output active and reactive power of the three-phase inverter. The system finishes boosting / reducing, inversion and energy storage through single-stage power conversion, realizes the minimum inverter capacity with a simple structure, ensures the steady power of the power grid, can collect solar energy to the greatest degree, improves the power generation efficiency, realizes reactive compensation, electric peak regulation control and the like, and improves the quality of the power grid.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a single-stage step-up / step-down energy storage type photovoltaic grid-connected power generation control system. Background technique [0002] Traditionally, thermal power is the main form of electric energy, but its fossil fuels are very limited, less and less, and may even be exhausted, and the price is getting more and more expensive; moreover, the burning of fossil fuels produces a lot of pollution, causing serious harm to the living environment. On December 7, 2009, the United Nations Climate Change Conference was held in Copenhagen, the capital of Denmark, which reflected the world's concern for the environment. Energy conservation and emission reduction and the use of renewable new energy have received enough attention and have entered human daily life. [0003] Photovoltaic power generation is one of the promising new energy power generation, mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/28H02J3/18
CPCY02E70/30Y02E10/566Y02E10/563Y02E40/30Y02E10/56
Inventor 葛宝明
Owner BEIJING JIAOTONG UNIV
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