Second-order cone programming method for solving interval power flow of active distribution network

A technology of active distribution network and second-order cone planning, which is applied to AC networks with different sources of the same frequency, etc., can solve the problems of difficult distribution network operation state, difficult to guarantee calculation accuracy and solution efficiency, and poor global convergence. , to achieve good global convergence, easy to understand and use, and easy to achieve

Active Publication Date: 2019-09-06
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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Problems solved by technology

[0004] There have been research results on interval power flow modeling and solution algorithms, but their global convergence is poor, and calculation accuracy and solution efficiency are difficult to guarantee
It is difficult for active distribution network operators to fully grasp the operation status of the distribution network

Method used

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  • Second-order cone programming method for solving interval power flow of active distribution network
  • Second-order cone programming method for solving interval power flow of active distribution network
  • Second-order cone programming method for solving interval power flow of active distribution network

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Embodiment Construction

[0042] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0043] like figure 1 As shown in , a second-order cone programming method for solving the interval power flow of active distribution network includes the following steps:

[0044] S1: Select interval power flow quantity y to be demanded one by one ± As the objective function, solve the interval power flow variable y ± The precise interval boundary of the active distribution network is established to establish a nonlinear programming model for the interval power flow of the active distribution network; the required quantity of the interval power flow is the voltage amplitude of each node except the balance node, the active power and reactive power of each branch, and the expression is as follows :

[0045]

[0046] The established nonlinear programming model of active distribution network inte...

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Abstract

The invention belongs to the technical field of power system interval power flow calculation and specifically relates to a second-order cone programming method for solving interval power flow of an active distribution network. By converting a nonlinear programming model of the interval power flow of the active distribution network into a second-order cone programming model of the interval power flow of the active distribution network and carrying out calculating, accurate interval upper and lower boundary values of an interval power flow to be solved are obtained, and furthermore, the solutionof the interval power flow to be solved of the active distribution network is obtained through calculation. The method is easy to implement and efficient to calculate, and can be used for online calculation of the interval power flow of the active distribution network; and the obtained interval boundary of a power flow variable is more accurate, is more efficient in calculation and is convenientfor operators of the active distribution network to understand and use. Compared with a nonlinear programming method, the provided cone programming method has better global convergence, and can accurately calculate the interval values of the power distribution network power flow state; and meanwhile, the method has higher calculating efficiency than a Monte Carlo method.

Description

technical field [0001] The invention belongs to the technical field of power system interval power flow calculation, and in particular relates to a second-order cone programming method for solving active distribution network interval power flow. Background technique [0002] Some researchers applied interval mathematics to power flow calculation and proposed the concept of interval power flow. Interval power flow only needs to clearly input the interval boundaries of uncertain quantities, which is more convenient for practical application. Li Zhikeng, Wang Gang, ChenZhigang, et al.An interval load flow based on algorithm for service restoration in distribution network with distributed generations[J], VaccaroA, Willacci D.Radial power flow tolerance analysis by interval constraintpropagation[J], et al. The interval model of uncertain factors in distribution network is established, and the interval power flow problem of distribution network is studied, and the upper and lower ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 郭小璇杨艺云韩帅秦丽娟孙乐平吴宛潞肖静吴宁冯玉斌
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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