Connection transformer input method, system and device for hot standby connection transformer circuit
A transformer circuit and hot standby technology, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, can solve problems such as excitation inrush current, and achieve the purpose of solving excitation inrush current and reducing excitation The effect of inrush current and saving engineering investment
Active Publication Date: 2020-07-31
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF15 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The invention provides a connection transformer input method, system and equipment for a hot standby connection transformer circuit, which solves the technical problem of the excitation inrush current caused by the closing deviation of the phase selection closing device existing in the prior art
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
[0049] Such as figure 1 As shown, 1 is the AC circuit breaker, 2 is the connection transformer, 3 is the resistor, 4 is the arm reactor, 5 is the flexible DC converter valve, and 6 is the submarine cable; the characteristic of the offshore wind power converter station is that the connection transformer Two parallel transformers are used as hot standby for each other. During normal operation, the two connected transformers are switched on at the same time before the DC starts, and the AC voltage is 0 before switching on. However, when one connected transformer is overhauled, the other connected transformer operates independently. After the overhaul is completed, the overhauled transformer needs to be closed at the rated AC voltage.
[0050] The reason for the excitation inrush current caused by the closing of the connected transformer is that the phase of the magnetic flux caused by the AC voltage is inconsistent with the phase of the residual magnetism of the transformer. Assu...
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 relates to the technical field of offshore power generation and transmission, in particular to a connection transformer input method, a system and a device for a hot standby connection transformer circuit, and aims to solve the technical problem of magnetizing inrush current caused by closing deviation of a phase selection closing device. The method comprises the following steps: switching a control mode in the flexible direct-current converter valve to an alternating-current voltage controller control mode through a control system; adjusting the AC voltage controller through thecontrol system, and reducing the AC voltage of the hot standby connection transformer circuit to a preset value; and controlling the other group of alternating-current circuit breakers to finish switching-on through the control system, so that the hot standby connection transformer of the hot standby connection transformer circuit is switched on.
Description
technical field [0001] The invention relates to the technical field of offshore power generation and its transmission, in particular to a connection transformer input method, system and equipment for a hot standby connection transformer circuit. Background technique [0002] In recent years, with the implementation of my country's sustainable development policy, a series of renewable energy power generation technologies represented by solar energy and wind energy are developing vigorously. Among them, wind power technology includes two branches of onshore wind power and offshore wind power. Compared with onshore wind power, the construction of offshore wind power is more difficult, and special requirements are put forward for wind power grid-connected technology. The goal of the offshore wind power project is to send the electric energy generated by the offshore wind farm to the land and realize the grid connection with the land power grid. Offshore wind power projects are ...
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 Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/36H02H9/00
CPCH02J3/38H02J3/36H02H9/002Y02E60/60
Inventor 徐迪臻赵晓斌李岩辛清明卢毓欣郭龙秦康
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD