Fast power distribution network loop opening feasibility judgment method and device

A Technology of Distribution Network, Combining and Removing Rings

Active Publication Date: 2019-02-15
RUILI POWER SUPPLY BUREAU OF YUNNAN POWER GRID CORP
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  • Fast power distribution network loop opening feasibility judgment method and device
  • Fast power distribution network loop opening feasibility judgment method and device
  • Fast power distribution network loop opening feasibility judgment method and device

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[0033] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] 1. Application of 10kV distribution network for power regulation by closing loop

[0035] The distribution network generally adopts "closed-loop design, open-loop operation". With the improvement of distribution automation level, the requirements for distribution reliability are getting higher and higher. In order not to affect the user's power supply in the case of equipment maintenance, the "hot dump" load method can be used, that is, the feeder contact switch T is closed first. 1 , to achieve double-ended power supply, and then turn on the designated switch to isolate the equipment that needs to be repaired. like figure 1 As shown, an application process of unclosing loop power regulation is given for the situation of maintenance equipme...

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Abstract

The invention discloses a fast power distribution network loop opening feasibility judgment method and device. The device comprises an initialization module, a positioning load position module, an outlet power calculation module and a safety assessment checking module, wherein the initialization module is used for obtaining the position information needing to perform loop opening, and recording the power values of the two ends of a loop-opening feeder line at the moment; the positioning load position module is used for carrying out feeder line topology analysis, determining a feeder line segment section with measurement, performing measurement based on switches on the two sides, and estimating the size of the section load; according to the position of the loop-opening point, a feeder lineoutlet of a transformer substation needing checking is determined; the position of the load of the feeder line segment region is determined through the topology information; the outlet power calculation module is used for carrying out power flow calculation of the network after the loop-opening only comprising the additional load, and the power of the feeder line outlet of the transformer substation is saved; the power of the feeder line outlet of the transformer substation is calculated through the superposition principle with the power flow calculation; and the safety assessment checking module is used for correcting the load flow of the feeder line by utilizing the calculated outlet power, and judging the loop-opening safety. The invention provides a method and a means for achieving theimplementation of the loop-opening power regulation application.

Description

technical field [0001] The invention relates to the field of distribution automation, in particular to a method and device for judging the feasibility of fast distribution network closing and unwinding. Background technique [0002] For the measurement of 10kV distribution network load, it is often lacking. The electricity marketing department can only provide electricity energy data of electricity users, and its measurement accuracy is not enough. With the large-scale access of distributed energy in the distribution network, the control requirements for the distribution network are getting higher and higher, and the loop closure of the distribution network is based on this. However, the lack of real-time load measurement data for the 10kV feeder will lead to the inability to calculate the loop closing current due to the lack of data, which greatly affects the improvement of the reliability requirements of the distribution network. With the improvement of distribution auto...

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Application Information

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IPC IPC(8): H02J3/00G01R31/08
CPCG01R31/086H02J3/00H02J2203/20
Inventor 王金芹周倩杨占丽李文云曹敏刘柱揆刘红文王洪林方正云赵现平王科黄星
Owner RUILI POWER SUPPLY BUREAU OF YUNNAN POWER GRID CORP
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