Elastic operation control method for AC/DC hybrid distribution network

An AC/DC hybrid, power distribution network technology, applied in power transmission AC network, single AC network with different frequencies, etc., can solve the problems of no consideration, difficult to adapt, and no research on the flexibility of AC and DC power grids.

Pending Publication Date: 2019-05-31
SICHUAN UNIV +1
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  • Application Information

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Problems solved by technology

[0004] This method does not consider the impact of today's high-permeability distributed power generation on resilience evaluation, and the research on grid resilience in the above two litera...

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  • Elastic operation control method for AC/DC hybrid distribution network
  • Elastic operation control method for AC/DC hybrid distribution network
  • Elastic operation control method for AC/DC hybrid distribution network

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Embodiment Construction

[0171] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0172] Such as figure 2 As shown, an AC-DC hybrid distribution network elastic operation control method includes the following steps:

[0173] S1. Determine the elasticity evaluation index of the AC-DC hybrid distribution network;

[0174] S2. Establish a sequential transfer model of the AC and DC distribution network;

[0175] S3. Use the greedy search algorithm to solve the time-sequence transfer model of the AC-DC hyb...

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Abstract

The invention discloses an elastic operation control method for an AC/DC hybrid distribution network. By establishing a distribution network elastic evaluation index, an energy storage model, a wind power and photovoltaic output model, and constructing a AC/DC distribution network timing sequence transfer model, overall modeling is performed. Since the model is a nonlinear mixed integer programming model and is difficult and inefficient to solve by an artificial intelligence algorithm or enumeration method. Therefore, the invention provides a greedy search algorithm for solving and optimizingthe model. When a fault occurs in the AC/DC hybrid distribution network, the provided model takes account of the transfer and control capabilities of the energy storage, transfers the loads in the faulted distribution network area in cooperation with distributed power sources such as wind power and photovoltaic power in the distribution area and the standby power supply capacity of an adjacent tieline, calculates the elastic index according to a transfer result, optimizes the output of each energy storage period by an improved particle swarm optimization algorithm to obtain an optimal energystorage output mode, and finally achieves the maximum elastic operation of the distribution network in the fault area.

Description

technical field [0001] The invention belongs to the technical field of elastic evaluation of urban power distribution network of electric power system, and in particular relates to an elastic operation control method of AC / DC hybrid distribution network. Background technique [0002] In recent years, the urban distribution network has a high load density and has high requirements for power supply reliability and power quality. However, the urban space is limited, and it has become more and more difficult to meet the continuous growth of load by assuming new lines. Although the current general urban distribution network The power supply capacity of the power grid is large. However, due to constraints such as section transmission power, there are congestion phenomena between many lines. When facing the peak load period, many areas of the distribution network have a large power supply pressure, and the power supply elasticity of the distribution network is low. And now, with th...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/02
CPCY02E60/60
Inventor 刘友波尹航刘向龙袁晓冬李强陈亮
Owner SICHUAN UNIV
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