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Photovoltaic power station active power change rate control method and system, and storage medium

A technology of active power and photovoltaic power plants, applied in the direction of reducing/preventing power oscillation, single-network parallel feeding arrangement, etc., can solve the problems of unsatisfactory actual effect, decline and increase of output power of photovoltaic power plants, etc., and achieve maximum power generation Effect

Active Publication Date: 2019-11-08
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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  • Photovoltaic power station active power change rate control method and system, and storage medium

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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 photovoltaic power station active power change rate control method. For the photovoltaic power plant active power change rate control, a method of combination of periodic adjustment and real-time sudden drop detection is adopted to effectively solve the photovoltaic power station active power change rate out-of-limit problem in the various weather work condition. The maximum limit remaining amount of the 10-minute active power change rate is calculated in real time, a 1-minute active power change rate limit value is corrected in a rolling mode to meet the requirementsof the 1-minute active power change rate and the 10-minute active power change rate at the same time and maximize the photovoltaic generating capacity of the photovoltaic power station.

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 Applications(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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