Multi-state power system scheduling method considering reliability and wind shear rate constraints

A power system scheduling and power system technology, applied in wind power generation, instruments, data processing applications, etc.

Active Publication Date: 2020-06-19
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

There is a lack of a multi-state model-based power system sch...

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  • Multi-state power system scheduling method considering reliability and wind shear rate constraints
  • Multi-state power system scheduling method considering reliability and wind shear rate constraints
  • Multi-state power system scheduling method considering reliability and wind shear rate constraints

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Embodiment Construction

[0089] The present invention will be further described below in conjunction with drawings and embodiments.

[0090] According to the embodiment of the invention content method complete implementation of the present invention and its implementation process are as follows:

[0091] by figure 1 Take the IEEE8 node system diagram as an example:

[0092] Among them, the node 2 is connected to the wind power generation unit, and the units on the other nodes are all thermal power units. The transmission capacity of all transmission lines is set to 200MW. Assume that the forecast error of load demand is a Gaussian distribution with a standard error of 3% of the forecast value. The cost for the unit to provide positive operating reserve and negative operating reserve is set to 200. The capacity of the wind turbine is set to 140MW, and the probability and output corresponding to different states in the multi-state model are obtained from the literature "Karki R, Hu P, Billinton R. ...

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Abstract

The invention discloses a multi-state power system scheduling method considering reliability and wind shear rate constraints. The method comprises the steps of establishing a multi-state model of a load demand, a multi-state model of fan output and a multi-state model of a generator set fault, and constructing a multi-state model of a power system; according to the multi-state model of the power system, in the total state of each power system, in combination with the probability of the state, processing to obtain an expected load shedding value and an expected wind shear value; enabling a unitcombination model considering expected load loss parameters and expected wind cutting parameter constraints to carry out optimal scheduling on the power systems on the premise that the system reliability and the wind shear rate are met; calculating the active power output and the operation standby distribution value of a generator set in each time period of the next day , and then scheduling thepower systems. According to the invention, the output and operation reserve of each generator set of the power systems can be accurately dispatched, and the system is ensured to meet the requirementsof reliability and wind shear rate.

Description

technical field [0001] The invention belongs to a power system scheduling method in the technical field of power system operation, and relates to a multi-state power system scheduling method considering the constraints of reliability and wind cutting rate. Background technique [0002] With the advancement of the grid intelligence process, the high proportion of intermittent energy sources (such as wind energy, solar energy, etc.) has led to an increasing peak-to-valley load difference in the grid, and the reliability of the power system has become more prominent. The power system urgently needs a power system that can guarantee A method for optimal dispatching of generator output and distribution of operating reserve capacity under the premise of reliability. In addition, the traditional dispatching method mostly adopts a two-state model, that is, the generator set can only be in a normal operation state or a complete failure state, while ignoring intermediate states such a...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46G06Q10/06G06Q50/06
CPCG06Q10/06315G06Q50/06H02J3/46Y02E10/76
Inventor 丁一杨阳胡怡霜
Owner ZHEJIANG UNIV
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