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A Reconfiguration Method for Photovoltaic Distribution Network Considering Multidimensional Security Constraints

A technology of distribution network reconfiguration and safety constraints, applied in photovoltaic power generation, genetic rules, electrical components, etc., can solve the problems of adjustment costs, risk costs and economic and security benefits that need to be studied, frequent switch operations, etc. To achieve the effect of avoiding slow calculation speed

Active Publication Date: 2019-10-22
HEYUAN POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology

For the dynamic model, the optimal scheme requires frequent operation of the switch, which cannot be realized at the current automatic level of the distribution network, and the relationship between the adjustment cost and risk cost of such an adjustment scheme and the economic and security benefits remains to be studied

Method used

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  • A Reconfiguration Method for Photovoltaic Distribution Network Considering Multidimensional Security Constraints
  • A Reconfiguration Method for Photovoltaic Distribution Network Considering Multidimensional Security Constraints
  • A Reconfiguration Method for Photovoltaic Distribution Network Considering Multidimensional Security Constraints

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Embodiment

[0085] In the embodiment of the present invention, a distribution network with multiple main transformers and multiple feeders interconnected is used for calculation example analysis. There are contact switches between different substations or the same substation, which presents the characteristics of ring network design and open-loop operation, such as image 3 As shown, the numbers 4, 14 and 25 are the initial disconnection switches of the network, and the line and transformer parameters are shown in Table 1. Among them, node 5, node 17 and node 29 are connected to distributed photovoltaics with installed capacity of 3MW, 4MW and 4MW respectively. After cluster analysis, it is determined that when the number of photovoltaic data clusters is 5, the S value is the largest, and the output of five typical photovoltaic scenarios is classified into normalization curve, such as Figure 4 as shown in Table 2, the active load amplitude of different load points on the maximum load day...

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Abstract

The invention relates to a photovoltaic power supply included distribution network reconfiguration method considering multidimensional safety constraints. The method comprises the steps of 1, collecting modeling parameters of a target distribution network; 2, collecting preset time T-day historical data of the output of a photovoltaic power plant in a target area, conducting a cluster analysis ona photovoltaic output curve to determine an optimal cluster number N, and obtaining a cluster center Z0 of the N typical photovoltaic output scenarios as an output curve of the corresponding output scenario; 3, determining a load demand scenario and a typical photovoltaic output scenario curve, and based on distribution network security domain indicators, constructing a photovoltaic distribution network reconstruction mathematical model considering multi-scenario N-1 safety constraints; and 4, using a genetic algorithm to solve the photovoltaic distribution network reconstruction mathematicalmodel considering the multi-scenario N-1 safety constraints, and obtaining an optimal reconstruction scheme for the photovoltaic distribution network. The method of the invention improves the safety domain theory of the distribution network, makes the N-1 safety constraints of the photovoltaic distribution network a part of the network optimization reconstruction model, and avoids the problem of slow calculation speed caused by a point-by-point simulation method.

Description

technical field [0001] The invention relates to the related field of distribution network optimization control, and more specifically, relates to a method for reconfiguring a distribution network containing photovoltaic power sources considering multi-dimensional security constraints. Background technique [0002] In recent years, with a large number of distributed photovoltaic power sources connected to the distribution network, the optimal operation of the distribution network is facing new opportunities and challenges. On the one hand, photovoltaic power is a renewable and clean energy source, and improving the distribution network's ability to absorb photovoltaics is of great significance for realizing the low-carbon economic operation of the distribution network. On the other hand, the photovoltaic power output has a strong intermittent and random nature, and the access of a large number of photovoltaic power sources will have a certain negative impact on the distributi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38H02J3/46G06N3/12
CPCG06N3/126H02J3/00H02J3/383H02J3/46H02J2203/20Y02E10/56Y04S10/50
Inventor 王东芳陶飞达杨夏钟运平黄智鹏熊洽游景方
Owner HEYUAN POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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