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Quick determination method for security boundary quantity of power distribution network

A technology of security boundary and determination method, applied in the field of distribution network, can solve problems such as cumbersome process

Active Publication Date: 2017-05-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the determination of the safety boundary needs to write the boundary equation one by one or simulate [4] , the process is more cumbersome

Method used

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  • Quick determination method for security boundary quantity of power distribution network
  • Quick determination method for security boundary quantity of power distribution network
  • Quick determination method for security boundary quantity of power distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] see Figure 4 , the embodiment of the present invention provides a method for quickly determining the number of distribution network security boundaries, the method includes the following steps:

[0091] 101: Select the observation feeder and judge its contact relationship;

[0092] 102: Find out the additional components of each observation feeder;

[0093] 103: According to the feeder connection relationship, select the corresponding oblique / straight boundary quantity calculation formula to determine the boundary quantity.

[0094] To sum up, the embodiment of the present invention realizes through the above steps 101 to 103 that it does not need to simulate the security domain or write the security boundary equation, and can quickly determine the security boundary only by observing the network structure of the distribution network and combining the calculation formula of the boundary quantity. The number of borders.

Embodiment 2

[0096] The following is combined with the specific calculation formula, Table 1-4, and appendix Figure 1-Figure 5 The scheme in Example 1 is further introduced, see the following description for details:

[0097] 201: Obtain a complete security boundary;

[0098] The embodiment of the present invention studies the complete safety boundary of the distribution network, and the types of component failures are feeder outlet failures and main transformer failures. For a distribution network with m main transformers and n feedback lines, its complete security boundary can be expressed as

[0099]

[0100] In formula (1), express fault caused The boundary corresponding to the capacity constraint; i and j are the serial numbers of the components; for faulty components; is the limiting element; CB DSSR For a complete set of security boundaries.

[0101] number of borders is equal to the set CB DSSR The number of elements in

[0102]

[0103] Among them, the two-...

Embodiment 3

[0221] The feasibility of the schemes in Examples 1 and 2 will be verified below in combination with specific calculation examples, see the description below for details:

[0222] The grid structure of the example power grid is as follows: figure 1 As shown, there are 2 35kV substations, 4 main transformers, 20 circuits of 10kV feeders, 22 feeders or feeder section loads, all feeders are JKLYJ-185, and the allowable capacity is 12MVA. The main transformer data of the substation are shown in Table 4.

[0223] Table 4 Basic Information of Main Transformer

[0224]

[0225] Implementation steps of the present invention

[0226] 1) Select the observation feeder and judge its contact relationship

[0227] For example, if the feeders F8 and F9 are selected for observation, the connection relationship between the feeders is the same near and the same distance.

[0228] 2) Find out the extra elements of the observation feeder

[0229] The additional components of the feeder F8...

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Abstract

The invention discloses a quick determination method for security boundary quantity of a power distribution network. The quick determination method comprises the following steps of selecting observation feeder lines, and judging a contact relation thereof; finding an extra element of each loop of observation feeder line; and determining the boundary quantity by selecting a corresponding inclined / linear boundary quantity calculation formula according to the contact relation of the feeder lines. By further researching of the generation mechanisms of the security boundary of the power distribution network, the security boundary quantity determination method according to the contact relation of the feeder lines in the power distribution network is provided; the method does not need security domain simulation or listing writing of a security boundary equation; and instead, the security boundary quantity can be quickly determined by observing the network structure of the power distribution network and by combination with the boundary quantity calculation formula.

Description

technical field [0001] The present invention relates to the field of distribution networks, in particular to a method for quickly determining the number of safety boundaries of a distribution network. Through this method, the number of safety boundaries can be obtained by simply observing the network structure of the distribution network without simulating or writing a safety boundary equation. . Background technique [0002] The power distribution system faces users directly, and its security has been paid more and more attention. The smart grid will completely change the power distribution system, realize the full informatization and automation of the power distribution system, and provide a new basic condition for the safe and efficient operation of the power distribution system. [0003] "Guidelines for Urban Power Network Planning and Design" stipulates the N-1 safety criterion, and based on this, the planning, construction and operation of the distribution network are...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F17/50G06Q50/06
CPCG06F30/367G06Q50/06H02J3/00H02J2203/20Y02E60/00
Inventor 肖峻张宝强张苗苗左磊
Owner TIANJIN UNIV
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