Double-axis excitation device for synchronous condensers

A dual-axis excitation and phase modulation technology, which is applied to circuit devices, control generators, and control generators through changes in magnetic field, etc., can solve the problems of increasing the power angle of the unit, damage to the end insulation, and heating of the motor end, etc. Achieve precise adjustment and improve the effect of phase advance depth

Pending Publication Date: 2019-03-01
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

However, excessive phase advancement of the condenser will cause heat at the end of the motor, and excessive phase advancement for a long time will damage the insulation at t

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  • Double-axis excitation device for synchronous condensers

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] In order to make the advantages of the technical solution of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 As shown, the excitation device of the condenser provided by the embodiment of the present invention includes: a reactive power calculation device 1, a voltage transformer 2 and a current transformer 3 respectively conne...

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Abstract

The invention discloses a double-axis excitation device for synchronous condensers. The double-axis excitation device comprises a reactive power calculation device, a comparison circuit, a low-excitation protection circuit, a control circuit and a q-axis excitation regulator; a voltage transformer and a current transformer are respectively connected with a voltage input end and a current input endof the reactive power calculation device; an output end of the reactive power calculation device is connected with a measurement input end of the comparison circuit; a given reactive power circuit isconnected with a power input end of the comparison circuit; an output end of the comparison circuit is connected with an input end of the low-excitation protection circuit; an output end of the low-excitation protection circuit is connected with a control input end of the control circuit; the voltage transformer is connected with a measurement input end of the control circuit; a given voltage circuit is connected with a voltage input end of the control circuit; an output end of the control circuit is connected with a differential voltage input end of the q-axis excitation regulator; the givenvoltage circuit is connected with a given input end of the q-axis excitation regulator; and an output end of the q-axis excitation regulator is connected with a q-axis excitation winding. The excitation device is capable of avoiding the problems of end heating and unit power angle increase caused by excessive phase-in of the condenser, thereby ensuring the static stability of unit operation.

Description

technical field [0001] The invention relates to a dual-axis excitation device for a synchronous condenser. Background technique [0002] When the synchronous condenser is running, there is no mechanical load on the rotor, and there is no active power conversion inside the motor, and it mainly exchanges reactive power with the outside world. As a reactive power compensation device, the synchronous condenser has outstanding advantages in terms of dynamic characteristics and capacity, and is widely used in UHV DC transmission projects and other fields. However, excessive phase advancement of the condenser will cause heating at the end of the motor, and excessive phase advancement for a long time will damage the insulation at the end due to heat. At the same time, if the phase advance is too deep, the power angle of the unit will increase, and in extreme cases, the unit will lose its static stability. Contents of the invention [0003] In order to overcome the deficiencies o...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02P9/00H02P9/14
CPCH02J3/1885H02P9/006H02P9/14Y02E40/30
Inventor 付敏崔灿灿高伟楠
Owner HARBIN UNIV OF SCI & TECH
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