Reactive compensation intelligent management and control system for photovoltaic power generation surplus power grid connection

Abstract

The invention provides a reactive compensation intelligent management and control system for photovoltaic power generation surplus power grid connection. A photovoltaic power generation mechanism comprises a photovoltaic power generation panel, an MPPT module, a switch module, a controller and a reactive power calculation module. The photovoltaic power generation panel is connected to a power grid through the inverter and the LCL filter circuit; the reactive power calculation module is connected between the LCL filter circuit and the power grid, obtains an on-grid current value and an on-grid voltage value, calculates reactive power, and sends the calculated reactive power to the controller; and the controller judges whether the reactive power of surfing the internet meets the requirement or not according to the obtained photovoltaic power generation current and voltage values, the internet current value and the internet voltage value, and if the requirement is not met, the reactive power compensation device is started to compensate the reactive power of surfing the internet. The system realizes reactive intelligent management and control of distributed photovoltaic power generation, and improves the average power factor of photovoltaic grid connection.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation grid connection, in particular to an intelligent management and control system for reactive power compensation for photovoltaic power generation surplus power grid connection. Background technique [0002] The existing reactive power compensation of distributed photovoltaic power generation devices for self-generated self-use and surplus electricity connected to the grid mainly has the following problems: [0003] The existing reactive power compensation management and control device has no harmonic control device, which is greatly affected by harmonics and cannot be compensated accurately, resulting in low power factor for customers who install distributed photovoltaic power generation devices that are self-generated and self-consumed, and surplus electricity is connected to the grid. [0004] The existing reactive power compensation management and control device cannot moni...

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Problems solved by technology

[0003] The existing reactive power compensation management and control device has no harmonic control device, which is greatly affected by harmonics and cannot be compensated accurately, resulting in low power factor for customers who install distributed photovoltaic power generation devices that are self-generated and self-consumed, and surplus electricity is connected to the grid

[0004] The existing reactive power compensation management and control device cannot monitor the operation status of the distributed photovoltaic power generation device for self-use and surplus power connected to the grid. The reactive power compensation capacity invested is the unnecessary reactive power load of the grid load, which does not match the actual reactive power compensation needs of customers.

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