Ultrahigh-voltage phase modifier system applied to extra-high voltage converter station

An ultra-high voltage, camera-modulating technology, applied in electromechanical devices, AC network circuits, reactive power adjustment/elimination/compensation, etc., can solve the problem of affecting economic benefits, increasing costs, and increasing the space requirements of large-scale camera-modulating systems, etc. problems, to achieve the effect of improving overall reliability, reducing copper consumption, and improving dynamic reactive power output capability

Pending Publication Date: 2019-09-06
武汉研道科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The boost demand causes the stator current of the motor to be much larger than the actual current flowing into the grid, which increases the heat dissipation requirements of the motor
The step-up transformer and its auxiliary equipment increase the space requirements of the entire large-scale condenser system, which increases the cost and affects the overall economic benefits

Method used

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  • Ultrahigh-voltage phase modifier system applied to extra-high voltage converter station
  • Ultrahigh-voltage phase modifier system applied to extra-high voltage converter station
  • Ultrahigh-voltage phase modifier system applied to extra-high voltage converter station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The invention is applied to an ultra-high voltage direct current converter station, and its function is to provide dynamic and steady-state reactive power support and reactive power compensation.

[0036] This embodiment provides an ultra-high voltage condenser system. figure 1 It shows the functional block diagram of the ultra-high voltage condenser system provided by the embodiment of the present invention, and the details are as follows:

[0037] The ultra-high voltage condenser system includes an ultra-high voltage condenser 1, a self-shunt excitation static excitation system 2, a variable frequency starting system 3, a starting control module 4, an AC bus 5 of an ultra-high voltage converter station, and a high-voltage circuit breaker 6 at the outlet end; among them, Ultra-high voltage condenser 1 includes: stator core 1-1 and three-phase stator winding 1-2, rotor core 1-3, rotor excitation winding 1-4, output ports of three-phase stator winding 1-2 include excitat...

Embodiment 2

[0047] As another preferred embodiment of the present invention, this embodiment discloses:

[0048] An ultra-high voltage condenser system applied in an ultra-high voltage converter station, including an ultra-high voltage condenser 1, a self-shunt excitation static excitation system 2, and a variable frequency starting system 3; the ultra-high voltage condenser includes a stator 1-6 and a rotor 1-5, the stator 1-6 is composed of a stator core 1-1 and a stator winding 1-2, the rotor 1-5 includes a rotor core 1-3 and a rotor field winding 1-4, and the stator winding 1-2 It is made of cross-linked polyethylene cables to form a symmetrical Y-connected three-phase stator winding. By using cross-linked polyethylene cables instead of traditional forming wire rods to manufacture stator windings, the stator winding terminal voltage of large-scale condensers can be designed. In order to be equivalent to the voltage of the AC busbar of the converter station, it is possible to directly ...

Embodiment 3

[0051] As another preferred embodiment of the present application, refer to the attached figure 1 and 2 , this example discloses:

[0052] An ultra-high voltage condenser system applied in an ultra-high voltage converter station, including an ultra-high voltage condenser 1, a self-shunt excitation static excitation system 2, and a variable frequency starting system 3; the ultra-high voltage condenser 1 includes stators 1-6 and The rotor 1-5, the stator 1-6 consists of a stator core 1-1 and a stator winding 1-2, the rotor 1-5 includes a rotor core 1-3 and a rotor field winding 1-4, the stator Winding 1-2 is made of cross-linked polyethylene cables to form a symmetrical Y-connected three-phase stator winding. In the stator winding 1-2, 2M taps are extracted from each phase winding at equal and symmetrical positions to form M strips The branch circuit, the non-neutral point tap of the branch circuit closest to the neutral point 1-12 is used as the excitation port 1-2-1, and the...

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PUM

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Abstract

The invention discloses an ultrahigh-voltage phase modifier system applied to an extra-high voltage converter station, and relates to the technical fields of alternating current motors and systems thereof. The ultrahigh-voltage phase modifier system comprises an ultrahigh-voltage phase modifier, a self-parallel excitation static excitation system and a variable-frequency starting system; each stator winding of the ultrahigh-voltage phase modifier is made of cross-linked polyethylene cables, and three-phase stator windings with a symmetric Y-connection method are formed; each phase of winding is equal to each other, and 2M taps are drawn out of the symmetric positions of each winding so as to form M branches, wherein a non-neutral point tap of the branch closest to the neutral point servesas an excitation port, and the other taps serve as power ports, which are connected with a power system, of the stator windings; the power ports of the stator windings are directly connected with an ultra-high-voltage converter station bus through a high-voltage circuit breaker. The phase modifier is directly connected with the converter station bus, a boosting transformer is not needed, the occupied area of the phase modifier system on the extra-high voltage converter station can be remarkably reduced, the cost of the phase modifier system is lowered, and the overall reliability of the phasemodifier system is improved.

Description

technical field [0001] The invention relates to the technical field of AC motors and systems thereof, and more specifically relates to an ultra-high voltage condenser system applied in an ultra-high voltage converter station. Background technique [0002] With the rapid development of my country's economy, the uneven geographical distribution of load centers and power bases, especially clean energy production bases, has become more and more significant. In order to improve the clean energy consumption capacity and promote the sustainable development of the power industry, my country has built a number of UHV long-distance direct current transmission projects to transmit clean power from the west and north to the load centers in east and south China. [0003] The UHV DC transmission project is connected to the AC power grid through a DC converter station, and the converter is used to realize the AC-DC conversion of electric energy. However, for the receiving-end converter st...

Claims

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Application Information

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IPC IPC(8): H02K3/28H02K3/487H02J3/18
CPCH02K3/28H02K3/487H02J3/1885Y02E40/30
Inventor 肖洋肖海航李振兵
Owner 武汉研道科技有限公司
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