Island control method and system suitable for solar energy storage power generation system

A power generation system and island control technology, applied in the field of power electronics, can solve problems such as phase shift, product damage, and mains voltage fluctuations

Active Publication Date: 2019-09-06
深圳市尚科新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the solar energy storage power generation system, the frequency and voltage of the mains input are very wide, so the active island detection is applied to the solar energy storage power generation system, and the detection time is long, which is easy to generate islands or phase shift after the recovery of the mains power. product da

Method used

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  • Island control method and system suitable for solar energy storage power generation system
  • Island control method and system suitable for solar energy storage power generation system
  • Island control method and system suitable for solar energy storage power generation system

Examples

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Embodiment 1

[0045] see figure 1 , figure 1 It is a schematic diagram of an island control system suitable for a solar energy storage power generation system provided by Embodiment 1 of the present invention.

[0046] An island control system applicable to a solar energy storage power generation system, comprising a load detection module 01, a mains power module 02, a mains power relay 03 connected to the mains power module 02, a solar power generation system 04 for realizing solar power supply, The inverter detection module 05 connected to the solar power generation system 04 and the control module 06 respectively connected to the inverter detection module 05 , the load detection module 01 and the mains relay 03 will be described in detail below.

[0047] The inverter detection module 05 is used to detect the output voltage and current of the inverter in the solar module to provide to the control module 06 for calculating the inverter output power;

[0048] The load detection module 01 ...

Embodiment 2

[0060] An embodiment of the present invention provides an islanding control method suitable for a solar energy storage power generation system, and a control module executes the logic of the islanding control method suitable for a solar energy storage power generation system. see image 3 , image 3 It is a schematic flowchart of an islanding control method applicable to a solar energy storage power generation system provided by Embodiment 2 of the present invention. The method includes steps S11 to S13, which will be described in detail below.

[0061] Step S11, obtaining the inverter output power and load power of the inverter.

[0062] In the embodiment of the present invention, the control module can obtain the inverter output power output by the inverter according to the inverter detection module, and can obtain the power of the load terminal according to the load detection module.

[0063] Step S12, adjusting the inverter output power according to the preset logic, th...

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Abstract

Disclosed are an island control method and system suitable for a solar energy storage power generation system; according to the method, firstly, the inversion output power and the load power of an inverter are obtained; then, according to preset logic, the inversion output power and the load power, the inversion output power is adjusted so as to enable the load end voltage to be abnormal along with the adjustment of the inversion output power when the island occurs; and finally, when it is detected that the load end voltage is abnormal, a commercial power relay is disconnected, and the cuttingoff of the commercial power and the solar power generation system is realized. According to an energy positive feedback mode, when the commercial power is lost, the load end voltage is in fast avalanche, and the abnormal protection of the power grid is triggered to disconnect the connection between the load end and the power grid, so that the influence of wide working commercial power frequency range and the large commercial power voltage fluctuation of the solar energy storage power generation system can be avoided, and the island control of the solar energy storage power generation system is realized.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to an island control method and system suitable for solar energy storage power generation systems. Background technique [0002] The solar grid-connected power generation system converts solar energy into electrical energy, without storing energy in batteries, and directly sends electrical energy to the grid through grid-connected inverters. Grid-connected means that it must be connected to the public grid, that is, solar power generation, home grid, and public grid are connected together. This is a power generation system that must rely on the existing grid to operate. It is mainly composed of solar panels and inverters. The solar panels are directly converted into 220V AC by the inverter and power household appliances. When the power generated by solar energy exceeds the electricity used by household appliances, the excess electricity is sent to the public. Grid; and when the pow...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/383H02J3/32H02J3/388Y02E70/30Y02E10/56
Inventor 丁永强丁平
Owner 深圳市尚科新能源有限公司
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