A method for fast power response of photovoltaic power station inverter

Abstract

The present invention proposes a method for fast power response of photovoltaic power station inverters. In this method, the inverters of the whole station are configured as ordinary inverters participating in power regulation and sample inverters of natural maximum power generation not participating in power regulation. , the ordinary inverter obtains the DC bus voltage reference value of the sample inverter in the adjacent area based on communication, and at the same time receives the power target value sent by the fast power control device at the station end, and is adjusted by the voltage outer loop and the current inner loop to perform fast Response to power drop or leap-forward power ramping to achieve fast power control goals within 50 milliseconds for a single inverter and within 100 milliseconds for the whole station, meeting the requirements of the system for 100-millisecond adjustment response to photovoltaic power plants when the power grid is disturbed or abnormal , so as to improve the stability of the power grid, as well as the friendliness and economy of photovoltaic grid-connected.

Description

technical field [0001] The invention relates to the field of new energy power generation control, in particular to the power control of a photovoltaic inverter in a photovoltaic power station. Background technique [0002] With the increasing proportion of new energy in the power grid, the installed capacity of new energy in the "Three North" region is close to or even exceeds 30%. The high proportion of new energy severely squeezes the space for primary frequency regulation and rapid reserve capacity of conventional energy. , so that the operation of the power grid faces a series of challenges, and there is an urgent need for new energy such as photovoltaic power plants to speed up the response speed of power regulation to meet the needs of fast response to power regulation during power grid failures or disturbances, participate in primary frequency regulation of the power grid, and become a "friendly" power source for the power grid . In addition, for my country's Tibet, ...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a method for fast power response of photovoltaic power plant inverters, which can solve the problem of slow execution and fast execution of a single photovoltaic inverter only relying on its own information to increase or decrease power by referring to the state of adjacent sample inverters There is a problem with a high risk of jumping off the plane

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