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A power system optimal dispatching method considering photovoltaic access

A technology for optimizing dispatching and power systems, applied in the direction of system integration technology, information technology support systems, electrical components, etc., can solve the problem of lack of accurate control of photoelectric field output

Active Publication Date: 2019-03-12
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO +2
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Problems solved by technology

It adopts the method of shortening the prediction time and improving the prediction accuracy of photoelectric output, but it lacks more active and accurate control of the photoelectric field output, and still passively eliminates the fluctuation of photoelectric output.

Method used

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  • A power system optimal dispatching method considering photovoltaic access
  • A power system optimal dispatching method considering photovoltaic access
  • A power system optimal dispatching method considering photovoltaic access

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Embodiment Construction

[0027] The specific embodiments of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.

[0028] like figure 1 As shown, it is a flow chart of the optimal scheduling method of the present invention, including the following steps:

[0029] A) Obtain day-ahead load forecasting, transmission network topology, basic data of conventional units and backup plans, in units of hours, and divide the whole day into 24 time periods, and build a mathematical model for day-ahead optimization:

[0030]

[0031]

[0032] Among them, M is the number of all conventional units, p i，T is the operating power of conventional unit i in T period, a i , b i and c i are the quadratic coefficient, the primary coefficient and the constant of the operation cost of the conventional unit i respectively, p D，T is the system load forecast value in T period, is the predicted value of photoelectric output in T...

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Abstract

The invention relates to the field of power network dispatching optimization, in particular to a power system optimal dispatching method considering photoelectric access, comprising the following steps: A) making a plan ahead of schedule; B) dividing a day into time periods accord to time T as a unit, establishing and initializing each photoelectric field quality score Kw, updating that day-aheadplan accord to each photoelectric field quality score Kw to form an intra-day plan; C) real-time controlling that conventional unit to execute the intra-day plan within the time period, tracking the output of each photoelectric field and the output level of the conventional unit, calculate the photoelectric absorption income E at the end of the time period, updating the quality score Kw of each photoelectric field according to E, and repeating the step B-C until the day's scheduling is complete. By setting the quality score of the photoelectric field and tracking the actual effect of photoelectric dissipation, and feeding back to the intraday plan, the photoelectric dissipation is more active and the economic benefit of the photoelectric field is brought into full play.

Description

technical field [0001] The invention relates to the field of power grid scheduling optimization, in particular to a power system optimization scheduling method considering photoelectric access. Background technique [0002] Wind power and photovoltaics are sustainable clean energy sources. Photovoltaic fields are mainly built in areas with relatively rich wind energy resources such as mountainous areas and rural areas, while photovoltaic fields are mainly used in cities. It is mainly reflected in the construction and installation of photoelectric equipment on the top of urban buildings. As more and more photovoltaic fields are connected in the city, the impact of the random variation of photovoltaic field output with light intensity on the power quality of the grid is becoming more and more obvious. In some studies on urban development, some scholars have proposed to build energy storage devices while building photovoltaic fields in cities. The random output of the photovo...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06H02J3/00
CPCG06Q10/06312G06Q50/06H02J3/00H02J2203/20Y02E40/70Y04S10/50
Inventor 郁家麟方景辉唐锦江施海峰冯振宇张平陈其顾华东吴芳琳邬成锋张一鸣沈朗
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO
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