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Power distribution looped network optimal power flow control policy based on SNOP

An optimized control and ring network technology, which is applied to AC networks, circuit devices, and AC network circuits with the same frequency from different sources, can solve the problems of inability to reflect application advantages and high implementation costs, so as to improve overall economic efficiency and highlight superiority effect

Inactive Publication Date: 2018-10-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high implementation cost of SNOP, it cannot reflect its application advantages when it is only used for distribution network power flow control.

Method used

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  • Power distribution looped network optimal power flow control policy based on SNOP
  • Power distribution looped network optimal power flow control policy based on SNOP
  • Power distribution looped network optimal power flow control policy based on SNOP

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] 1. The optimal power flow of distribution ring network based on SNOP considers network loss, node voltage deviation and power loss inside SNOP comprehensively, which is a multi-objective optimization problem.

[0014] 1) The active power loss of the network is the smallest

[0015]

[0016] where r l ,P l , Q l , V l Indicates the impedance, active power, reactive power and voltage of branch l; L indicates the total number of branches in the network.

[0017] 2) The node voltage deviation is the smallest

[0018]

[0019] In the formula, V i Indicates the per unit value of node i voltage, and n indicates the total number of nodes in the network.

[0020] 3) The power loss inside the SNOP is minimal

[0021]

[0022] in,

[0023] In the formula, m represents the number of the VSC, m=1 represents VSC1, that is, the VSC connected to feeder 1, m=2, represents VSC2, that is, the VSC connected to feeder 2, P SNOP,Loss represents the internal power loss of ...

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PUM

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Abstract

The invention discloses a power distribution looped network optimal power flow control policy based on SNOP (soft normally open point, SNOP). The power distribution network based on the SNOP has highself-optimization capacity and can realize the power continuous regulation, and the operation is optimized as a large-scale and non-linear multi-target optimization problem; starting from the featureof the SNOP device, the multi-target function optimization problem is converted into a single target function optimization problem through a weight method by taking the minimum system network loss, the minimum node voltage bias and the minimum power loss in the SNOP as the target on the basis of satisfying the stable operation requirement of the system, thereby proposing a power distribution looped network optimal power flow control policy based on the SNOP and breaking through the economic bottleneck of the SNOP device application.

Description

technical field [0001] The invention relates to the field of power distribution systems, in particular to the field of power flow optimization control strategies for power distribution ring networks. Background technique [0002] With the large-scale access of high-penetration, large-capacity distributed power and new loads such as electric vehicles, the traditional distribution network is facing enormous pressure and challenges. The power flow optimization control strategy of the traditional distribution network based on the tie switch cannot guarantee the power flow control effect of the distribution ring network in a timely and effective manner due to the limitation of the number of switching operations and the continuity of regulation. A smart soft switch (soft normally open point, SNOP) is a power electronic device installed at a traditional tie switch. It has a high degree of self-optimization capability. With its powerful power flow regulation capability, it can effec...

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 仉志华杨洁
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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