Loop closing electricity switching detection and control system
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A technology of measurement and control system and analog-to-digital conversion circuit, which is applied in the field of electric power, can solve problems such as large closing ring impact current, circuit breaker explosion, power failure, etc., and achieve the effect of ensuring the reliability of power supply
Active Publication Date: 2014-07-16
STATE GRID CORP OF CHINA +2
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However, the ring closing operation may generate a large ring closing impact current, which brings considerable risks to the safe and stable operation of the system. power failure
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Embodiment 1
[0063] Figure 4 It is a structural diagram of a ring-closing power-swapping measurement and control system provided in an embodiment of the present application.
[0064] Such as Figure 4 As shown, the closed-loop power swap measurement and control system provided in this embodiment includes a power grid parameter detection module, a switching value detection module, a processor, a communication interface and a closed-loop control module. The processor is respectively connected with the grid parameter detection module, the switch value detection module, the communication interface and the loop closing control module.
[0065] The power grid parameter detection module is used to detect the power grid parameters of the power grid of the substation configured with three loop closing ports. The grid parameters include the bus voltage at one end of the grid, the bus voltage at the second section, the substation voltage at No. 1 station, the substation voltage at No. 2 station, t...
Embodiment 2
[0082] Image 6 It is a structural diagram of a ring-closing power-swapping measurement and control system provided by another embodiment of the present application.
[0083] Such as Image 6 As shown, the present embodiment adds a display device, a keyboard and a plurality of indicator lights 20 respectively connected to the processor on the basis of the previous embodiment.
[0084] The display device is used for displaying the state of the loop closing circuit breaker, the voltage of the first-stage busbar, the voltage of the second-stage busbar, and the voltage difference and phase difference between the buses.
[0085] The keyboard is used to receive the instructions of the controller on the spot and output the ring closing command, which is used as the control terminal of the local ring closing operation.
[0086] The display device is preferably a liquid crystal touch screen, and can also integrate the above-mentioned keyboard.
[0087] A plurality of indicator light...
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Abstract
The invention discloses a loop closing electricity switching detection and control system. The loop closing electricity switching detection and control system comprises a power grid parameter detection module, a switching value detection module, a processor, a communication interface and a loop closing control module. The loop closing time is calculated by the processor according to a preset calculation rule after power grid parameters are acquired by the power grid parameter detection module, when the communication interface receives a loop closing command, the best loop closing time is selected according to the switching value of a loop closing breaker acquired by the switching value detection module to output a loop closing signal, and a loop closing controller controls the loop closing breaker to perform loop closing operation after receiving the loop closing signal. Because the loop closing detection and control detection and control system does not directly perform loop closing operation according to the loop closing command but selects the best loop closing time according to the loop closing command, and thus a large impact current can be avoided, explosion of the breaker, loop protection override trip and other accidents cannot be caused, and power supply reliability of a power distribution network can be guaranteed.
Description
technical field [0001] The present application relates to the technical field of electric power, and more specifically, relates to a measurement and control system for closed-loop power swapping. Background technique [0002] In the operation process of modern power distribution network, the power supply modes of bidirectional power supply and multi-power supply are increasing, which makes load transfer, power outage maintenance, or emergencies more common. In order to improve the reliability of power supply, load transfer without power outage Loop closing operation has become a commonly used operation method in the operation and management of distribution network. However, the ring closing operation may generate a large ring closing impact current, which brings considerable risks to the safe and stable operation of the system. power failure. [0003] Therefore, there is an urgent need for a closed-loop power swap measurement and control system to ensure the power supply r...
Claims
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