Intelligent reclosing system for submarine cable-overhead hybrid line
A hybrid line and reclosing technology, applied in circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems affecting the safe and stable operation of equipment and systems, cable damage, cable failure, etc., to prevent The effect of protection coincidence on submarine cable failure
Inactive Publication Date: 2019-09-10
浙江华云清洁能源有限公司
View PDF1 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the fault section of the hybrid line is directly reclosed without judgment, it may lead to permanent cable fault, causing the cable to be impacted again and damaged, affecting the safe and stable operation of equipment and systems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.
[0015] See figure 1 This is an embodiment of the submarine cable overhead hybrid line intelligent reclosing system of the present invention. A submarine cable overhead hybrid line intelligent reclosing system includes: all-optical current transformers installed at both ends of the submarine cable, submarine cable in-situ differential protection 7 and A communication network connected to the control and protection equipment in the substation 1.
[0016] The all-optical current transformers are installed on the submarine cable outlets in the terminal stations 2 on both sides of the submarine cable respectively on the premise of not ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an intelligent reclosing system for a submarine cable-overhead hybrid line, comprising all-fiber current transformers and submarine cable local differential protection devices.The all-fiber current transformers are respectively installed at the two ends of a submarine cable to sense the current at the two ends of the submarine cable. The submarine cable local differentialprotection devices collect, calculate and process the differential current of the submarine cable line to judge whether the fault point is located in the submarine cable. If the submarine cable localdifferential protection devices judge that the fault point is located in the submarine cable through calculation, a reclosing locking signal is sent to the related protection devices in transformer substations on the two sides. The advantage is that separate differential protections for the submarine cable line are constructed in submarine cable terminal stations to judge the internal fault of thesubmarine cable line, and if the fault is judged to be inside the submarine cable line, a reclosing locking signal is sent to the related protection devices in the transformer substations on the twosides of the submarine cable-overhead hybrid line to achieve the function of reclosing locking and prevent the protections from reclosing to the fault of the submarine cable.
Description
Technical field [0001] The invention relates to a submarine cable overhead hybrid line intelligent reclosing system. Background technique [0002] About 90% of short-circuit faults in power systems are transient single-phase connection faults. After the relay protection action removes the short-circuit fault, the arc will be automatically extinguished, and the insulation at the short-circuit point can be automatically restored in most cases. The automatic reclosing technology can quickly restore the power supply to the system after the fault is removed, and improve the transient stability of the power system. It is an important safe automatic control method for the power system. [0003] With the rapid development of power systems, submarine cables and urban underground distribution cables are widely put into operation, and there are a large number of cable-overhead hybrid lines on site, which brings new challenges to the traditional reclosing technology. Most of the faults in ov...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02H7/26H02H3/06
CPCH02H3/066H02H7/262H02H7/263
Inventor 胡列翔沈宝兴於国芳盛海华林琳吴星昂戚宣威王松陆承宇姜涛
Owner 浙江华云清洁能源有限公司