CN105182211A - Testing device used for triggering detection of thyristor in UPFC (Unified Power Flow Controller) converter valve sub-module - Google Patents

Abstract

The invention discloses a testing device used for triggering detection of a thyristor in a UPFC (Unified Power Flow Controller) converter valve sub-module. The testing device comprises a detection circuit, a charging/discharging circuit and a controller, wherein the detection circuit comprises a current transformer and an electric reactor which are connected in series; the current transformer is connected with a signal input end of the controller; the charging/discharging circuit comprises a direct-current power supply and a discharging resistor which are connected in parallel; a branch circuit of the discharging resistor is connected with a switch K2 in series; a branch circuit of the direct-current power supply is connected with a switch K1 in series; and a signal output end of the controller, the two ends of the detection circuit and the two ends of the charging/discharging circuit are used as external ports of the testing device. According to the testing device, testing equipment is simplified while testing requirements on a triggering test of the thyristor of a UPFC converter valve are met; and a testing result is very intuitive and the efficiency is improved.

Description

For the test unit that IGBT group in UPFC converter valve submodule detects

Technical field

The present invention relates to a kind of test unit detected for IGBT group in UPFC converter valve submodule, belong to IGBT group Test And Check Technology field.

Background technology

At present, the feature of normally used IGBT group test unit is: design different hookups according to different device structures, and when triggering underproof thyristor, in metering circuit, element service data judges IGBT group situation.Its deficiency is: hookup complex structure, complex operation step, and test findings is directly perceived, and hookup differs, docking UPFC converter valve submodule surely makes it meet test condition.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides the test unit detected for IGBT group in UPFC converter valve submodule.

In order to achieve the above object, the technical solution adopted in the present invention is:

For the test unit that IGBT group in UPFC converter valve submodule detects, it is characterized in that: comprise testing circuit, charge-discharge circuit and controller;

Described testing circuit comprises current transformer and the reactor of series connection, and described current transformer is connected with controller signals input end;

Described charge-discharge circuit comprises direct supply in parallel and discharge resistance, the branch road at described discharge resistance place is serially connected with K switch 2, the branch road at described direct supply place is serially connected with K switch 1;

The two ends of described controller signals output terminal, testing circuit and the two ends of charge-discharge circuit are all as the external-connected port of described test unit.

Described controller signals output terminal is by the outside signal transmission of optical fiber.

The beneficial effect that the present invention reaches: this invention simplifies testing equipment and meet the testing requirements that UPFC converter valve thyristor triggers test simultaneously, test findings is very directly perceived, improves efficiency.

Accompanying drawing explanation

Fig. 1 is of the present invention is schematic diagram.

Fig. 2 is the structure diagram of tested converter valve submodule.

Fig. 3 is controller control flow.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.

As shown in Figure 1, for the test unit that IGBT group in UPFC converter valve submodule detects, testing circuit, charge-discharge circuit and controller is comprised.

Testing circuit comprises current transformer and the reactor of series connection, and current transformer is connected with controller signals input end, and the two ends of controller signals output terminal, testing circuit are respectively as external-connected port D5, D1 and D2 of described test unit.

Charge-discharge circuit comprises direct supply in parallel and discharge resistance, the branch road at discharge resistance place is serially connected with K switch 2, the branch road at described direct supply place is serially connected with K switch 1, and the two ends of charge-discharge circuit are respectively as external-connected port D3 and D4 of described test unit.

As shown in Figure 2, d1, d2, d3, d4 and d5 are the connectivity port of converter valve submodule.When carrying out IGBT group detection in converter valve submodule, D1 with D2 is connected with the anode of thyristor and negative electrode respectively, namely D1 with D2 is connected with d1 and d2 respectively, D5 is connected with the gate pole of thyristor, connect and adopt Fiber connection, namely D5 and d5 connects, D1 with D2 is connected with the two ends of electric capacity respectively, and namely D3 with D4 is connected with d3 and d4 respectively.

The course of work of test unit is as follows:

1, D1, D2, D5, D4, D5 are connected with d1, d2, d3, d4, d5 respectively, K switch 1, K2 disconnect.

2, Closing Switch K1, to converter valve submodule electric capacity two ends making alive until required value, determine each element normal operation, record current transformer current is I1.

3, to signal generation apparatus charging, controller sends Continuity signal to IGBT1, is generally a pulse, and ON time is less than 5 μ s, and record current transformer current is I2.

4, controller sends trigger pip to thyristor T1, and record current transformer current is I3, judges whether to trigger successfully by controller.

Decision logic is as shown in Figure 3, namely normal as I3>0.2I2, otherwise fault.

5, cut-off switch K1, Closing Switch K2, discharged by discharge resistance.

Above-mentioned test unit, simplify testing equipment and meet the testing requirements that UPFC converter valve thyristor triggers test simultaneously, test findings is very directly perceived, improves efficiency.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (2)

1., for the test unit that IGBT group in UPFC converter valve submodule detects, it is characterized in that: comprise testing circuit, charge-discharge circuit and controller;

Described testing circuit comprises current transformer and the reactor of series connection, and described current transformer is connected with controller signals input end;

Described charge-discharge circuit comprises direct supply in parallel and discharge resistance, the branch road at described discharge resistance place is serially connected with K switch 2, the branch road at described direct supply place is serially connected with K switch 1;

The two ends of described controller signals output terminal, testing circuit and the two ends of charge-discharge circuit are all as the external-connected port of described test unit.

2. the test unit detected for IGBT group in UPFC converter valve submodule according to claim 1, is characterized in that: described controller signals output terminal is by the outside signal transmission of optical fiber.