A Discrete Lossless Deep Current Limiting Device
A deep current-limiting, lossless technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as uneconomical operation, high energy consumption, and malfunction of the control system, and achieve the effect of improving operational safety.
Active Publication Date: 2018-08-28
ANHUI HEKAI ELECTRICAL TECH CO LTD
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Problems solved by technology
The problems of the first direct series reactor current limiting technology are mainly that the volume is large, the current limiting depth is limited, and the energy consumption is large during operation, the electromagnetic interference is serious, and the operation is uneconomical; the second zero loss current limiting The technical problems are mainly that the reactor installed on the switch body is put into operation, because the electromagnetic field is too strong, the interference to the controller below is very serious, and it is easy to cause the control system to malfunction; at the same time, because the commutation In the process, the magnitude of the induced potential of the reactor is relatively large, and the dv / dt is relatively high, which may cause the switch to fail to extinguish the arc during the commutation process, resulting in commutation failure, and accidents may occur in severe cases
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[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0020] see figure 1 , a discrete lossless deep current limiting device, including a deep current limiting reactor 1 and a commutation switching control integrated device 2, the deep current limiting reactor 1 is installed on the side of the commutation switching control integrated device 2 Connect in parallel; install the deep current-limiting reactor 1 independently and connect it with the commutation switching control integrated device 2, so that the strong magnetic field generated by the reactor during the commutation process will interfere with the sampling and control system It is dozens of times smaller than the vertical installation, which can effectively prevent the malfunction of the control system and improve the reliability and safety...
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The invention comprises a discrete lossless deep current-limiting device. The discrete lossless deep current-limiting device comprises a deep current-limiting reactor and a commutation, switching and control integrated device, and the deep current-limiting reactor is mounted on a side surface of the commutation, switching and control integrated device and is connected with the commutation, switching and control integrated device in parallel. The deep current-limiting reactor is mounted independently and is connected with the commutation, switching and control integrated device, so that interference of a high magnetic field generated by the reactor to sampling and a control system is several tens of times smaller than interference of a high magnetic field generated by a reactor mounted vertically to the sampling and the control system in a commutation process, and maloperation of the control system is prevented effectively, thereby improving reliability and safety of equipment.
Description
technical field [0001] The invention relates to the technical field of electric power equipment, in particular to a discrete lossless deep current limiting device. Background technique [0002] Currently, two technologies are mainly used to limit the short-circuit current. One technology is to connect a current-limiting reactor in series with the main circuit to ensure that the short-circuit current is directly limited when a short-circuit occurs in the rear section of the reactor. Another technology is to make the reactor smaller, and connect it in parallel with the switch installed in the body, and then connect it to the system. During normal operation, the switch short-circuits the reactor. Open the reactor and put it into operation for a short time to limit the current. After the fault is removed, put the switch into the closed state to resume normal operation. [0003] These two kinds of technologies all have more deficiencies. The problems of the first direct series ...
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IPC IPC(8): H02H7/22
CPCH02H7/22
Inventor 李俭华
Owner ANHUI HEKAI ELECTRICAL TECH CO LTD