Low-voltage distributed photovoltaic output estimation method

A distributed photovoltaic, low-voltage technology, applied in photovoltaic power generation, computing, data processing applications, etc., can solve the problems of poor system real-time performance, multiple points, high investment cost, reduce data deviation, improve application effect, and improve accuracy. Effect

Pending Publication Date: 2022-08-05
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology

[0003] At present, low-voltage distributed photovoltaic information collection is only through the marketing system, which has poor real-time performance, data delay of more than 1 hour, and problems such as real-time information loss, which cannot meet the needs of dispatching and control
In addition, the scheme of directly collecting low-voltage distributed photovoltaic output through the dispatching data network has the disadvantages of "many points and wide areas", high investment costs, difficult information collection, unclear management responsibility interface, and difficult post-operation and maintenance services

Method used

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Embodiment 1

[0049] figure 1This is a flowchart of a low-voltage distributed photovoltaic output estimation method provided in Embodiment 1 of the present invention. The distributed photovoltaic output has a strong correlation with meteorological conditions such as solar irradiance and temperature. The meteorological conditions of photovoltaics in the same area are similar. Therefore, the photovoltaic output in the same area has a strong spatial correlation. The relationship between the historical output of marketing low-voltage distributed photovoltaics in the region and the historical output of reference stations, find the connection between the two, and then calculate the real-time output of marketing low-voltage distributed photovoltaics, see figure 1 , the method of this implementation specifically comprises the following steps:

[0050] Collect the output of the base station at the current moment;

[0051] According to the output of the reference station at the current moment, and ...

Embodiment 2

[0085] like image 3 As shown, in order to improve the accuracy of the low-voltage distributed photovoltaic output estimation in the same area, this embodiment is optimized on the basis of the above-mentioned embodiment. In the same area, one or more can be selected according to the area and photovoltaic permeability of the same area. The final estimated low-voltage distributed photovoltaic output is obtained from each reference station. The low-voltage distributed photovoltaic output estimation method provided in this embodiment includes:

[0086] If there are multiple base stations in the same area, the low-voltage distributed photovoltaic output is estimated according to the output of each base station at the current moment, and the average value of the estimated low-voltage distributed photovoltaic output is taken as the final estimated low-voltage distributed photovoltaic output in the area.

[0087] As an embodiment of the present invention, in order to improve the accur...

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Abstract

The invention discloses a low-voltage distributed photovoltaic output estimation method in the technical field of power system automation, and aims to solve the problems that in the prior art, low-voltage distributed photovoltaic information collection is poor in real-time performance, data delay is more than one hour, real-time information is lost, and scheduling control requirements cannot be met. The method comprises: acquiring reference station output at a current moment; according to the output of the base station at the current moment and in combination with a predetermined association relationship between the marketing low-voltage distributed photovoltaic output and the output of the base station, matching the association relationship between the marketing low-voltage distributed photovoltaic output at the current moment and the output of the base station; estimating the low-voltage distributed photovoltaic output at the current moment according to the reference station output at the current moment and the association relationship between the matched marketing low-voltage distributed photovoltaic output at the current moment and the reference station output; the method is suitable for a power dispatching system, minute-level observation of low-voltage distributed photovoltaic output can be achieved, real-time performance is good, equipment investment does not need to be increased, and the actual application value is high.

Description

technical field [0001] The invention relates to the technical field of power system automation, in particular to a low-voltage distributed photovoltaic output estimation method. Background technique [0002] The characteristics of distributed photovoltaic output with strong random fluctuation and weak frequency / voltage support ability will have a great impact on the safe operation of the power grid. The power dispatching system urgently needs to achieve observable and measurable low-voltage distributed photovoltaics. [0003] At present, low-voltage distributed photovoltaic information is collected only through the marketing and acquisition system, which has poor real-time performance, data delay of more than 1 hour, and problems such as real-time information loss, which cannot meet the needs of dispatch control. In addition, the scheme of directly collecting low-voltage distributed photovoltaic output through the dispatching data network has the shortcomings of "multiple po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q30/02G06Q50/06
CPCG06Q30/0201G06Q50/06Y02E10/56
Inventor 罗飞卜强生高磊袁宇波戴强晟吕朋蓬叶志刚张潼彭志强郑明忠易文飞
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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