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A method, system, and storage medium for controlling the rate of change of active power in a photovoltaic power station

A technology for active power and photovoltaic power plants, applied in the direction of reducing/preventing power oscillations, single-network parallel feeding arrangements, etc., can solve problems such as unsatisfactory actual effects, rising power, and falling output power of photovoltaic power plants, so as to maximize power generation Effect

Active Publication Date: 2021-02-05
NARI NANJING CONTROL SYST
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Problems solved by technology

[0003] At present, in the active power change rate control algorithm of photovoltaic power stations, the influence of various weather conditions is not comprehensively considered, especially in cloudy weather, the process of cloud cover and withdrawal is very fast, and the output power of photovoltaic power stations drops and rises sharply, resulting in the actual effect not ideal

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  • A method, system, and storage medium for controlling the rate of change of active power in a photovoltaic power station
  • A method, system, and storage medium for controlling the rate of change of active power in a photovoltaic power station
  • A method, system, and storage medium for controlling the rate of change of active power in a photovoltaic power station

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[0046] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0047] Such as figure 1 As shown, a photovoltaic power plant active power change rate control method, the method includes the following steps:

[0048] Step 1): According to the installed capacity of the photovoltaic power station and the grid-connected standards, calculate the maximum limit value P of the active power change rate of the photovoltaic power station in one minute chg_1min_max and 10-minute active power change rate maximum limit P chg_10min_max ;

[0049] 1 minute active power change rate maximum limit P chg_1min_max Calculated as follows:

[0050]

[0051] 10-minute active power change rate maximum limit P chg_10min_max Calculated as follows:

[0052]

[0053] Among them: small photovoltaic power station refers to the phot...

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Abstract

The invention discloses a method for controlling the rate of change of active power of a photovoltaic power station. The method includes the following steps: for the control of the rate of change of the active power of a photovoltaic power station, a method combining periodic adjustment and real-time sag detection is adopted, which can effectively solve various problems. The problem of exceeding the limit of the active power change rate of photovoltaic power plants under weather conditions. By calculating the remaining amount of the maximum limit value of the 10-minute active power change rate in real time, and rolling the 1-minute active power change rate limit, it can not only meet the requirements of the 1-minute active power change rate and the 10-minute active power change rate, but also maximize the photovoltaic power. Power station power generation.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a method, system and storage medium for controlling the rate of change of active power of a photovoltaic power station. Background technique: [0002] In recent years, photovoltaic power generation has been vigorously developed as a renewable clean energy power generation. Due to the randomness and volatility of photovoltaic power generation, the grid connection of large-scale photovoltaic power plants will affect the safe and stable operation of the power grid, especially the short-term and large fluctuations of photovoltaic power will bring a huge impact to the power grid. "Q / GDW 617-2011 Technical Regulations for Connecting Photovoltaic Power Stations to the Grid" puts forward specific requirements for the 1-minute active power change and 10-minute active power change limits of photovoltaic power stations under normal operation conditions, so it is nec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/48H02J3/24
CPCH02J3/24H02J3/48
Inventor 刘双汤海宁王汉林严涛松柏嵩沈磊
Owner NARI NANJING CONTROL SYST
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