Generalized load random characteristic-considered power transmission and distribution coordinated planning method

A generalized load, power transmission and distribution technology, applied in the field of distributed power transmission and distribution collaborative optimization, can solve problems such as low accuracy and slow calculation speed, and achieve the effect of improving calculation speed and reducing calculation accuracy

Pending Publication Date: 2021-11-30
HANGZHOU DIANZI UNIV +1
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Problems solved by technology

First of all, the transmission-distribution coupling system is decoupled into a distributed decision-making framework of iterative interaction between transmission and distribution, and a probabilistic target cascading algorithm is adopted. Instead of taking each scenario as a separate coordina

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  • Generalized load random characteristic-considered power transmission and distribution coordinated planning method
  • Generalized load random characteristic-considered power transmission and distribution coordinated planning method
  • Generalized load random characteristic-considered power transmission and distribution coordinated planning method

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Embodiment Construction

[0150] The method of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0151] A method for coordinated planning of power transmission and distribution considering the random characteristics of generalized loads, comprising the following steps:

[0152] Step (1): First, track and measure wind power and photovoltaic power generation, and perform probability fitting on the measured data to solve the probability density function of the generalized load including wind and light. The specific method is as follows:

[0153] According to one year's measured data, the total power generation of wind power and photovoltaics is 50% of the traditional power load, and the load characteristics of this generalized load are analyzed.

[0154] Z=P load -P pv -P wind (1)

[0155] Among them, P load is the electricity demand per hour of the electricity load, P pv is the photovoltaic power generation per hour, P wind is t...

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Abstract

The invention discloses a generalized load random characteristic-considered power transmission and distribution coordinated planning method, which comprises the following steps of decomposing a transmission and distribution coupling system into a plurality of small systems according to a physical structure, and then constructing a transmission and distribution iterative interaction distributed decision framework, firstly, fitting a probability density function of generalized loads containing distributed new energy according to measured data, randomly sampling generalized load values by using a Monte Carlo sampling method, and sequentially accessing the generalized load values into a power distribution network with new energy power generation, and independently operating each power transmission system and each power distribution system, and solving the boundary power between power transmission and power distribution. According to the method, the mean value and the standard deviation of the boundary power are used as shared variables, the probabilistic target cascade algorithm is used, information transmission between the power transmission system and the power distribution system is achieved, the target function with the Lagrange penalty function is listed with the minimum total operation cost of the system as the target, and therefore the calculation precision is not reduced, and the operation speed can be greatly improved.

Description

technical field [0001] The invention belongs to the field of distribution network planning and relates to a distributed power transmission and distribution collaborative optimization method considering generalized load characteristics for power transmission and distribution coordination. Background technique [0002] The power transmission and distribution system of the power grid is a complex physical system with time-space coupling characteristics, and its structure can be divided into three layers: "source-network-load". However, different from the traditional power transmission and distribution system: the scale and complexity of modern power grids are increasing, and the types of elements contained are also increasing. Among them, especially the penetration rate of renewable energy in the power grid is constantly increasing. increase, leading to its uncertainty problem that needs to be solved urgently. In recent years, a large-scale addition of distributed generation (...

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Application Information

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IPC IPC(8): H02J3/00H02J3/46G06Q10/04G06Q10/06G06Q50/06
CPCH02J3/00H02J3/008H02J3/381H02J3/46G06Q10/04G06Q10/06313G06Q10/06312G06Q50/06H02J2203/10H02J2203/20H02J2300/24H02J2300/28H02J2300/40Y02E10/56Y02E40/70Y04S10/50
Inventor 汪慧娟曾平良
Owner HANGZHOU DIANZI UNIV
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