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A method for solving optimal power flow in active distribution network

A technology for active distribution network and optimal power flow, which is applied in electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2015-08-05
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

The disadvantage of this method is firstly that it does not take into account the coupling correlation on each time section brought about by the introduction of the active distribution network into the energy storage system, and secondly, it does not optimize the adjustment of the tie switch

Method used

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  • A method for solving optimal power flow in active distribution network
  • A method for solving optimal power flow in active distribution network
  • A method for solving optimal power flow in active distribution network

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Embodiment Construction

[0034] refer to figure 1 , the method for solving the optimal power flow of the active distribution network of the present invention includes the following steps:

[0035] S1 proposes an optimal power flow model based on the active distribution network

[0036] Optimal power flow model control variables: including all distributed generation units connected to the active distribution network, all distributed energy storage systems connected to the active distribution network, and distribution Network contact switch;

[0037] The objective of the optimal power flow model: it is the comprehensive operating cost in the entire dispatching cycle, which is composed of the operating cost of each time section in the dispatching cycle, including: grid power cost, energy storage charging and discharging cost, other types of distributed generation costs, and The adjustment cost of tie switch position change, its objective function can be expressed as follows:

[0038] min...

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Abstract

The invention relates to a method applicable to the optimal power flow solution of an active power distribution network, and the method comprises the following steps that (S1) an optimal power flow model based on the active power distribution network is presented; (S2-1) the active distribution network optimal power flow scheduling cycle is classified into a plurality of sections which are connected back and forth; (S2-2) the state transition equation of an nth time section is as shown as follows: x (n+1)=Tn (x(n), u(n)) (3) and, the optimal power flow u(n) based on the nth time section is equal to opf(x(n)) (4); (S2-3) the target function of the section is shown in the specifications (5); and the optimal decision-making combinations of all sections form the optimal power flow scheduling strategy of the whole scheduling cycle. According to the method applicable to the optimal power flow solution of the active power distribution network, the operation cost is minimized within a complete scheduling cycle on the premise of meeting various network operation constraints and ensuring the utilization of renewable energy to the largest extent.

Description

technical field [0001] The invention relates to a method suitable for solving the optimal power flow of an active distribution network. Background technique [0002] The active distribution network refers to the distribution network in which distributed power sources are highly permeable and can actively dispatch and control the connected distributed energy sources, realize optimal network operation and maximize the utilization of renewable energy. The optimal power flow of active distribution network is the core part to realize the optimal operation of the network and ensure the maximum utilization of renewable energy. [0003] At present, the research on the optimal power flow of the active distribution network mainly focuses on solving the optimal output of each distributed generation unit in a time section with the goal of minimizing the network line loss. The disadvantage of this method is firstly that it does not take into account the coupling correlation on each time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 钟清刘东尤毅余南华宋旭东于文鹏
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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