Wide area self-adaptation spare power automatic switching method based on synchronous phasor measurement
A synchronous phasor measurement and automatic switching technology, which is used in emergency power supply arrangements, electrical components, circuit devices, etc. Support and other issues to ensure uninterrupted power supply and avoid losses
A synchronous phasor measurement and automatic switching technology, which is used in emergency power supply arrangements, electrical components, circuit devices, etc. Support and other issues to ensure uninterrupted power supply and avoid losses
CN102904331AActive Publication Date: 2013-01-30ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +1
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[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0029] Wide-area self-adaptive standby auto-input logic based on synchrophasor measurement such as figure 1 , where small power processing logic such as figure 2 . Combine below image 3 The regional power grid shown is taken as an example for illustration.
[0030] Before the fault, SD station and ZQ station used L1 as the main supply line to provide power supply path, corresponding to CB0, CB1, CB2, CB3, CB4, and CB5 are all in the closed position, L3 is used as a backup line to provide a backup path, corresponding to CB6 in the closed position, and CB7 in the closed position. Points, M1, M2, M3, M4 are charged during normal operation. L1 trips due to a fault, correspondingly trips CB0 and CB1. When there is no small power supply, M1, M2, and M3 are all powered off, and the conventional standby automatic switch may not work, and it is necessary t...
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The invention discloses a wide area self-adaptation spare power automatic switching method based on synchronous phasor measurement. By means of topology analysis, an association relationship between buses and lines is determined, a mode of operation of the lines and the buses is recognized, an initial operation state is recorded, faulty area, normal power supply area and area to be restored are determined, whether small power sources in a regional power grid are required to be immediately removed or not is determined, if the small power sources in the regional power grid are not required to be immediately removed, a spare power automatic switching power source is subjected to a quasi-synchronization grid connection, otherwise, all small power circuit switches in the area to be restored are tripped off, all non-fault working power source switches in a power-loss area are tripped off, and power restoration process is completed through circularly searching for power supply buses to be restored and closed corresponding line switches. According to the wide area self-adaptation spare power automatic switching method based on the synchronous phasor measurement, a centralized decision-making coordination mode which is specific to the integrated power grid is utilized so that a novel spare power automatic switching method has the advantages that the wide area is achieved, the method is capable of being self-adaptive to operation mode and the small power sources access to the power grid.
Description
technical field [0001] The invention belongs to the field of electric power system automation, and more specifically relates to a wide-area self-adaptive backup and automatic switch-on method based on synchronized phasor measurement. Background technique [0002] With the development of social economy, the scale of power grid is expanding day by day, the structure of power grid is becoming more and more complex, and the quality and reliability of power supply are getting higher and higher for users. In the modern power grid, in order to meet the economic and reliable operation of the power grid, the power grid wiring generally adopts closed-loop design and open-loop operation, especially for 110kV power grid. Therefore, it is widely used as an effective means to improve the reliability of power supply to configure the backup power automatic input device (abbreviated as standby automatic input device). For example, a 110kV substation is equipped with at least two power incom...
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Patent Timeline
30 Jan 2013
Publication
CN102904331A
- IPC
- H02J9/06
- Inventors
- 高昌培; 王宇恩