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Automatic governance method for low voltage in distribution network based on improved ant colony algorithm

An ant colony algorithm and low-voltage technology, applied in the field of power grid operation, can solve problems such as low voltage at the end of distribution lines and lagging speed of distribution network transformation, and achieve the effect of improving the convergence speed

Active Publication Date: 2018-04-13
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology

[0002] With the growth of the national economy, the level of electricity consumption of residents has a high growth rate, but the speed of distribution network transformation is obviously lagging behind, so the problem of low voltage at the end of the distribution line frequently occurs

Method used

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  • Automatic governance method for low voltage in distribution network based on improved ant colony algorithm
  • Automatic governance method for low voltage in distribution network based on improved ant colony algorithm
  • Automatic governance method for low voltage in distribution network based on improved ant colony algorithm

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Embodiment

[0051] Step 1. Draw the topology diagram of the Youxian Line, fill in the attribute values ​​of the corresponding equipment, and calculate the power flow distribution of the line. The results show that some nodes have low voltage problems, such as image 3 The black part shown is the low-voltage area. It can be seen from the figure that there are 66 nodes in the Yuxian Line, 65 transmission line sections, and 50 distribution transformers. Before the low-voltage treatment, there are 46 nodes with a voltage lower than 9.3KV, and The lowest node voltage is only 8.70KV, there are serious low voltage problems.

[0052] Step 2, adopt the 10KV distribution network management plan of "Distribution Network "Low Voltage" Management Technology Principles (Trial)" for low voltage management, and the treatment steps are as follows figure 2 As shown, the cross-section of the wire is increased in turn (the cross-section of the overhead main line of the 10KV urban distribution network should...

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Abstract

Provided is an automatic governance method for low voltage in a distribution network based on an improved ant colony algorithm. The improved ant colony algorithm is applied to the study of the investment cost of distribution network low voltage governance for the first time. That the voltages of all the nodes of a 10kV distribution network reach the normal voltage is taken as a constraint condition, the minimum investment cost of the governance scheme is used as an optimization objective, the ant travel taboo table is limited, and the pheromone updating rule of the basic ant colony algorithm is improved through a best-worst ant system, which improves the convergence speed of the algorithm. Example comparison between the 10kV distribution network governance scheme in the distribution network 'low voltage' governance technical principle (trial) and the algorithm proposed by the invention shows that the algorithm proposed by the invention has economic advantage in low voltage governance and can help to solve the problem of distribution network low voltage governance.

Description

technical field [0001] The invention relates to an improved ant colony algorithm-based automatic low-voltage control method for a distribution network, which belongs to the technical field of power grid operation. Background technique [0002] With the growth of the national economy, the level of electricity consumption by residents has a very high growth rate, but the speed of distribution network transformation is obviously lagging behind, so the problem of low voltage at the end of the distribution line frequently appears. The low-voltage problem of 10KV distribution lines is manifested in the fact that the voltage at the end node of the line is lower than 7% of the nominal voltage, that is, when the voltage at the end of the line is lower than 9.3KV, it is called the low-voltage phenomenon of 10KV distribution network. Due to the diversification of the structure of 10KV distribution lines, the reasons for the low voltage of the distribution network are also different, so...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06G06N3/00H02J3/12
CPCG06N3/006G06Q10/04G06Q50/06H02J3/12Y02E40/70Y04S10/50
Inventor 王文彬伍小生范瑞祥李琼蒙天骐
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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