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Low-network-loss distribution ring network open-loop operation site selection method

A technology of distribution network and network loss, applied in the direction of AC network circuit, single-network parallel feeding arrangement, electrical components, etc. Distributed relevance, unfavorable promotion and use, etc., to achieve the effect of improving implementation and promotion, easy editing, and clear physical concepts

Active Publication Date: 2020-07-14
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the implementation procedure of the above method is often limited to a specific power grid model, which is not universal and portable, and cannot reveal the correlation between network loss and distribution network load distribution, which is not conducive to popularization.

Method used

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  • Low-network-loss distribution ring network open-loop operation site selection method
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  • Low-network-loss distribution ring network open-loop operation site selection method

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Embodiment 1

[0046] Reference figure 1 The schematic diagram is a schematic flow diagram of the location selection method for a low-loss distribution ring network open-loop operation proposed in this embodiment, which specifically includes the following steps:

[0047] S1: Obtain the equivalent circuit of the distribution ring network and assume that a flexible tie switch is introduced in a branch to divide it into two systems;

[0048] Among them, the equivalent circuit can be obtained according to the circuit topology of the distribution ring network. It is assumed that an ideal flexible tie switch is introduced as an auxiliary calculation element in a branch of the equivalent circuit, and the distribution network is divided into Two systems, including system A and system B.

[0049] S2: Assuming that the flexible tie switch is in a locked state, obtain the initial line loss model of the distribution network;

[0050] Specifically, the flexible tie switch does not take any control measures init...

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Abstract

The invention discloses a low-network-loss distribution ring network open-loop operation site selection method. The method comprises the steps that: obtaining an equivalent circuit of a distribution ring network, introducing a flexible interconnection switch, and dividing the switch into two systems; obtaining an initial line loss model of the power distribution network; obtaining a power distribution network line loss model; obtaining an optimal current active component and an optimal current reactive component output by the flexible interconnection switch under minimum line loss according tothe line loss mathematical expression of the power distribution network; obtaining a resistance distance, an active current moment and a reactive current moment of each node in the two divided systems; calculating the combined active current moment and the combined reactive current moment of the two systems, and obtaining the relationship between the combined active current moment and the reactive current moment and the optimal current active and reactive components; and determining an optimal opening point of the open-loop operation mode of the power distribution network with minimum networkloss as an objective according to the optimal current active component. According to the method of the invention, the relation between the loss of the power distribution network and load distributionimbalance degree can be obtained through the combined current moments, so that the optimal open-loop operation mode with the minimum loss network of the power distribution network is obtained.

Description

Technical field [0001] The present invention relates to the technical field of power dispatch control, and in particular to a method for selecting a location for open-loop operation of a distribution ring network with low network loss. Background technique [0002] In recent years, domestic power grids have mainly adopted the power supply mode of "closed-loop design and open-loop operation". The advantage is that the closed-loop and switching operation can be used to realize load transfer without interruption, thereby improving the reliability and continuity of power supply. Among them, the distribution network, as the last link of power production and supply, transmits power from substations or distributed power sources to each user. Therefore, its network structure is more complicated than the main network. In addition, the number of distribution network components is large, making the distribution network The network loss occupies a large proportion of the entire power supply ...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/38H02J3/26
CPCH02J3/06H02J3/26H02J3/381Y02E40/50
Inventor 张宏俊郝丽萍胡慧杜鹃付锡康朱平宋希静李鹏周湘云林燕瞿杨全代自强刘雨彭仕伦王银山
Owner GUIZHOU POWER GRID CO LTD
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