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A Multi-state Power System Scheduling Method Considering Reliability and Wind Cutting Rate Constraints

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

Active Publication Date: 2021-07-06
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is a lack of a multi-state model-based power system scheduling method considering reliability constraints in the prior art

Method used

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  • A Multi-state Power System Scheduling Method Considering Reliability and Wind Cutting Rate Constraints
  • A Multi-state Power System Scheduling Method Considering Reliability and Wind Cutting Rate Constraints
  • A Multi-state Power System Scheduling Method Considering Reliability and Wind Cutting 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 dispatching method considering the constraints of reliability and wind cutting rate. Establish a multi-state model of load demand, a multi-state model of wind turbine output and a multi-state model of generator failure, and build a multi-state model of the power system; according to the multi-state model of the power system, under the overall state of each power system, combine The probability of the state is processed to obtain the expected load shedding value and expected wind cutting value; the unit combination model that takes into account the constraints of expected load loss parameters and expected wind cutting parameters is used for the power system under the premise of satisfying system reliability and wind cutting rate. Carry out optimal scheduling, calculate the active power output and operating reserve allocation value of the generator set in each time period of the future, and then schedule the power system. The invention can accurately schedule the output and operation backup of each generator set in the electric power system, and ensure that the system meets the requirements of reliability and wind cutting 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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Patent Type & Authority Patents(China)
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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