5 results about "Double circuit line" patented technology

Natural disasters, such as cyclones, earthquakes, landslides, etc., or manmade damages, such as structural member's theft, terrorist attacks, etc., can cause collapse of transmission line towers. If these are not restored in time, there will be monetary loss to utilities as well as loss of service to consumers leading to societal impact. Generally, permanent restoration takes several weeks. Hence, a temporary solution for quick retrieval of power transmission is required. This invention provides a temporary support structural system comprising light weight guyed masts (1) made of readymade robust modules (6 and 7), easy to connect connection system, two pin gimbal joint (8) and easy to construct foundation system (9 and 10). The invention is flexible enough to develop various configurations for single or double circuit transmission lines. It is also scalable and can be used for 33 to 800 kV transmission lines.

The invention provides a zero-sequence impedance detection method based on digital twinning and a related device, the zero-sequence impedance detection method is applied to a main server of a power distribution network system, and the power distribution network system further comprises detection modules on a first end and a second end of a double-loop power transmission line, and a frequency sweeping excitation module in communication connection with the main server, the method comprises the steps that environment data and line structure data of the power distribution network system are acquired, the frequency sweeping excitation module is controlled to send frequency sweeping excitation signals changing in a preset frequency band to the power distribution network system, and the detection module is controlled to detect zero-sequence detection signals, responding to the frequency sweeping excitation signals, of the power distribution network system; and receiving the zero-sequence detection signal, determining zero-sequence voltage data and zero-sequence current data according to the zero-sequence detection signal, and inputting the environment data, the line structure data, the zero-sequence voltage data and the zero-sequence current data into a preset digital twinborn model to obtain a zero-sequence impedance parameter. According to the embodiment of the invention, the detection precision of the impedance can be improved.

The present application relates to the technical field of double circuit line electric field detection, in particular to a double circuit line electric field detection and early warning method and system. The method has the following steps: S1, obtaining an electric field distribution model of a target area based on theoretical calculation; S2, establishing a regional electric field model; S3, obtaining a reconstructed electric field distribution model; S4, obtaining the real-time spatial coordinates of a target person; S5, based on the reconstructed electric field distribution model, obtaining an electric field distribution set at a set region set with the real-time spatial coordinates as the reference, and performing a warning action when there is a value exceeding the set alarm threshold in the electric field distribution set. The system is used to implement the above method. The present application can preferably realize early warning of electric field overlimit based on theoretical values and field measured values.

An overhead power line (1) comprises seven-phase supports (2a), each having seven connecting attachments (5) supporting seven respective electrical phases (3). The connecting attachments (5) of each seven-phase support (2a) comprise a central connecting attachment (52) and six peripheral connecting attachments (51), arranged so that the respective electrical phases (3) are at the vertices of a hexagonal polygon, preferably a regular hexagon. The six peripheral connecting attachments (51) support six electrical phases (3), which are three electrical phases of a first set (31a, 31b, 31c) and three electrical phases of a second set (32a, 32b, 32c) of homologous phases, arranged alternately with each other, while the central connecting attachment (52) supports at least one electrical phase of a third set (33) of homologous phases. Compared to the double-circuit power lines, they improve various technical performances, among which there is a reduction in magnetic induction in the surrounding environment, and it also improves the social and environmental impact of the power line, allowing existing power lines to be upgraded.

The present disclosure relates to a method for determining a fault in a two-circuit line, the two-circuit line comprising a first line and a second line. The method comprises: calculating a first angle of power at a starting point of a monitored line length of a first line; calculating a second angle of power at an end point of the length of the monitored line of the first line; performing an operation on the first angle and the second angle to calculate a first fault factor; and determining whether the fault is on the first line or the second line based on the polarity of the first fault factor. The disclosure further relates to corresponding devices and systems.