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Optimization method for electric distribution network contract structure for improving power supply capacity

A technology of power supply capacity and optimization method, applied in the direction of power network operating system integration, AC network voltage adjustment, information technology support system, etc., can solve problems that rarely consider the coordination relationship between upper and lower power grids

Inactive Publication Date: 2012-06-27
天津天电清源科技有限公司
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AI Technical Summary

Problems solved by technology

However, they seldom consider the coordination relationship between the upper and lower power grids, and optimize the planning of substations and medium-voltage distribution networks in a unified manner.

Method used

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  • Optimization method for electric distribution network contract structure for improving power supply capacity
  • Optimization method for electric distribution network contract structure for improving power supply capacity
  • Optimization method for electric distribution network contract structure for improving power supply capacity

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Embodiment Construction

[0044] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0045] First, the maximum power supply capacity model of the power distribution system established by the present invention is described.

[0046] The load transfer method in the case of N-1 verification of the main transformer based on the secondary transfer of the overloaded main transformer is as follows: figure 1 shown. From figure 1 It can be seen that if a main transformer fails, the main transformer connected to the same station can be overloaded for a short time to share the load, but the overload cannot exceed a certain limit. After a period of operation, the load of the overloaded part can be transferred to other main transformers, so that all the main transformers are not overloaded. If the capacity of the communication channel is small, the constraint of channel capacity should also be considered during load transfer.

[0047] The calculation pr...

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Abstract

The invention belongs to the field of power distribution system optimization planning, relating to an optimization method for an electric distribution network contract structure for improving power supply capacity, the optimization method comprises the following steps of: (1), building a power supply capacity calculating module of an electric distribution system for calculating main transformer overload and contact capacity constraint; (2), compiling the power supply capacity calculating module; (3), using the power supply capacity, number of main transformer contact channels and total length of region contact channels as an objective function to build an optimization model based on a multi-objective main transformer contact structure; (4), adopting genetic algorithm to achieve the optimization for the electric distribution network contract structure. The optimization method can satisfy the load growth requirements on the condition of trying not to add sites and occupying fewer corridors, and can completely improve the utilization factor of the urban electric distribution network on the basis of ensuring the power supply to be safe and reliable.

Description

technical field [0001] The invention belongs to the field of distribution system optimization planning, and relates to a method for optimizing a connection structure of a distribution network. Background technique [0002] With the rapid development of urban economy, especially in super-large cities, the increasingly tight land use makes the selection of substation sites and power corridors very difficult. If the high-voltage substation and medium-voltage distribution network are planned according to traditional technical principles, it will be very difficult. It is difficult to meet the power supply demand of all levels and types of user loads while reducing the construction scale and reducing the consumption of land resources. The optimization of the connection structure is an important content in the selection of the distribution network operation mode and the planning of the grid structure. The connection of distribution network is the channel for restoring power supply...

Claims

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Application Information

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IPC IPC(8): H02J3/14G06N3/12
CPCY04S10/545Y02E40/76Y04S20/224Y02B70/3225Y04S20/222Y02E40/70Y04S10/50
Inventor 刘洪韩俊刘阳郭寅昌
Owner 天津天电清源科技有限公司
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