CN205067679U - A test device that is used for in UPFC change of current valve submodule piece thyristor to trigger detection - Google Patents

Abstract

The utility model discloses a test device that is used for in UPFC change of current valve submodule piece thyristor to trigger detection, including detection circuitry, charging and discharging circuit and controller, detection circuitry includes the current transformer and the reactor of establishing ties, and current transformer is connected with the controller signal input, charging and discharging circuit includes parallelly connected DC power supply and discharge resistance, and propping up of discharge resistance place has concatenated switch K2 on the road, and propping up of DC power supply place has concatenated switch K1 on the road, controller signal output, detection circuitry's both ends and the all conducts of charging and discharging circuit's both ends test device's external connection port. The utility model discloses having simplified testing equipment and having satisfied UPFC change of current valve thyristor simultaneously and trigger experimental test requirement, the test result is very directly perceived, has improved efficiency.

Description

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

Technical field

The utility model relates to a kind of test unit detected for IGBT group in UPFC converter valve submodule, belongs 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.

Utility model content

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

In order to achieve the above object, the technical scheme that the utility model adopts 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 utility model reaches: the utility model simplifies testing equipment and meets 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 utility model 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 utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection domain of the present utility model 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 preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection domain of the present utility model.

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.