An anti-parallel thyristor state detection system and method
A technology of state detection and thyristor, which is applied in the field of anti-parallel thyristor state detection system, can solve problems such as complex circuit structure, and achieve the effect of simple circuit structure and reliable operation
Active Publication Date: 2015-11-04
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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[0005] In view of this, the main purpose of the present invention is to provide an anti-parallel thyristor state detection system and method to solve the problem in the prior art that only a single thyristor state can be detected, and a dedicated power supply needs to be provided for the detection circuit, and the circuit structure is complex.
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[0037] In order to make the above objects, features and advantages of the present invention more comprehensible, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0038] The present invention is an anti-parallel thyristor state detection system, aiming at the problem that in the prior art, the state detection circuit of the thyristor needs a special power supply, the circuit structure is complex, and the state of a single thyristor can only be detected, and a voltage detection circuit structure is proposed. The voltage detection circuit is connected in parallel to both ends of the two anti-parallel thyristors, and the working state of the anti-parallel thyristors is judged by whether the optical fiber transmitter in the voltage detection circuit is turned on or not to send a signal.
[0039] Based on the above ideas, see figure 1 and figure 2 As shown, an ant...
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The invention discloses a system for detecting the state of anti-parallel thyristors. The system is used for easily and quickly detecting the potential state of the anti-parallel thyristors. The system comprises an anti-parallel thyristor circuit and a voltage detection circuit which are connected in parallel; the anti-parallel thyristor circuit comprises a first thyristor and a second thyristor which are connected in an anti-parallel way; the voltage detection circuit comprises a first circuit and a second circuit which are connected in series; the first circuit comprises a first voltage-regulator tube and a first optical fiber transmitter which are connected in the anti-parallel way; the second circuit comprises a second voltage-regulator tube and a second optical fiber transmitter which are connected in the anti-parallel way; the connection directions of the first voltage-regulator tube and the second voltage-regulator tube are opposite to each other; and the connection directions of the first optical transmitter and the second optical transmitter are opposite to each other. The invention also discloses a method for detecting the state of the anti-parallel thyristors.
Description
technical field [0001] The invention relates to the technical field of circuit design, in particular to an anti-parallel thyristor state detection system and method. Background technique [0002] Thyristors are widely used in high-voltage direct current transmission systems and industrial conversion fields due to their high withstand voltage rating, large current capacity, and high reliability. The basic combination structure of anti-parallel thyristors is widely used in SVC (Static Var Compensator, static var compensation device), soft start and other equipment. When a thyristor fault occurs in an industrial site, it is necessary to quickly determine the location of the faulty thyristor. Therefore, it is necessary to detect the state of the thyristor in real time, which is helpful for fast fault location and can save time for equipment maintenance. [0003] In the prior art, the thyristor detection method is to connect several resistors in parallel at both ends of the thyr...
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IPC IPC(8): G01R31/26
Inventor 杨磊曹洋谭胜武徐振初蕊吕顺凯王桂华曹超蔡宇峰
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS