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Optimal Power Flow Calculation Method for Multi-period Electrical Interconnection System Based on Wind Speed ​​Prediction

A technology for optimal power flow and wind speed prediction, applied in wind power generation, electrical components, load prediction in AC networks, etc., can solve problems such as loss of optimality, violation of natural gas system security, etc.

Inactive Publication Date: 2018-08-28
HOHAI UNIV
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Problems solved by technology

However, the traditional optimal power flow calculation is oriented to the power system, ignoring the constraints of the natural gas system, the resulting solution may lose optimality, and may even violate the security of the natural gas system

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  • Optimal Power Flow Calculation Method for Multi-period Electrical Interconnection System Based on Wind Speed ​​Prediction
  • Optimal Power Flow Calculation Method for Multi-period Electrical Interconnection System Based on Wind Speed ​​Prediction
  • Optimal Power Flow Calculation Method for Multi-period Electrical Interconnection System Based on Wind Speed ​​Prediction

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Embodiment Construction

[0085] The implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation and inclusion of the present invention are not limited thereto.

[0086] In this embodiment, an optimal power flow calculation method for multi-period electrical interconnection systems based on day-ahead wind speed prediction, it first performs wind speed prediction based on the wind speed data provided by the US Renewable Energy Laboratory, and selects No. 4 wind farm as the prediction object. The average wind speed is 7.668m / s. The wind speed data in January 2006 was selected as the observation sample, and one data point was recorded every 10 minutes, with a total of 720 data points. Taking the average of the 6 data points per hour as the average wind speed of the hour, 120 observation points can be obtained, the first 96 points are used as training samples, and the last 24 points are used as prediction samples...

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Abstract

The invention discloses an optimal power flow calculation method for a multi-period electricity-gas interconnection system based on wind speed prediction and is applicable to the field of power system optimization control. According to the method, firstly, a wind speed prediction method based on variational mode decomposition and gaussian process regression is proposed, and accordingly a probability distribution curve for currently predicating the wind speed is obtained; an electricity-gas interconnection system multi-period optimal power flow model is established, the minimum total operation cost serves as the target, and the model relates to operation constraint of an power system and a natural gas system; punishment cost and standby cost are adopted to describe influences caused by wind power overestimation and wind power underestimation respectively. It is indicated through the embodiment that the power system and the natural gas system restrict each other, comprehensive optimization is beneficial for obtaining of a globally optimal solution, and safety and reliability of the systems are further guaranteed. Besides, the wind power punishment cost and wind power standby cost have great influences on a regulation scheme, a reference is provided for optimized operation of the systems under the background that new energy is introduced, and decision support is provided for scheduling personnel.

Description

technical field [0001] The invention belongs to the technical field of power system operation analysis and control, and relates to a multi-period electrical interconnection system optimal power flow calculation method based on day-ahead wind speed prediction. technical background [0002] In recent years, with the increasing development of economy and technology, energy depletion and environmental problems have accelerated the pace of natural gas industry development. The main advantages of natural gas lie in three aspects: relatively low investment cost, low-temperature gas emission, and flexible and fast response characteristics. Therefore, in the foreseeable future, natural gas is expected to be widely used in power systems. The U.S. Energy Information Administration promulgated the "Clean Power Plan" in 2015, and it is estimated that by 2035, 60% of the power generation units in the United States will be gas-fired units. The gas-fired unit establishes the coupling rela...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/06
CPCH02J3/003H02J3/06H02J3/386H02J2203/20Y02A30/00Y02E10/76
Inventor 孙国强陈霜卫志农陈胜张思德
Owner HOHAI UNIV
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