CN215867059U - Dynamic reactive compensation fault detection device and system - Google Patents
Dynamic reactive compensation fault detection device and system Download PDFInfo
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- CN215867059U CN215867059U CN202121311906.7U CN202121311906U CN215867059U CN 215867059 U CN215867059 U CN 215867059U CN 202121311906 U CN202121311906 U CN 202121311906U CN 215867059 U CN215867059 U CN 215867059U
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Abstract
The application relates to a dynamic reactive compensation fault detection device and system. The dynamic reactive power compensation fault detection device comprises a control module and a low-voltage circuit, wherein the input end of the low-voltage circuit is externally connected with a test power supply; one output end of the low-voltage circuit is used for being connected with the wire inlet side of the thyristor unit to be tested, and the other output end of the low-voltage circuit is used for being connected with the tail end side of the thyristor unit to be tested so as to conduct the thyristor unit to be tested under the condition that a test power supply is connected; a data acquisition module; the data acquisition module is connected between the input end of the low-voltage circuit and one output end of the low-voltage circuit; the signal input end of the control module is connected with the signal output end of the data acquisition module. Based on the application, the fault processing time is greatly reduced, the fault finding work efficiency is improved, and the equipment power failure time is shortened.
Description
Technical Field
The application relates to the technical field of reactive power compensation, in particular to a dynamic reactive power compensation fault detection device and system.
Background
SVC (static Var compensator) dynamic reactive power compensation device mainly improves the power factor and the power supply quality of railway traction power supply. In the daily use process, a fault point cannot be accurately judged after a Thyristor Controlled Reactor (TCR) branch circuit of the SVC dynamic reactive compensation system fails, and a maintainer adopts an observation method and a test method to judge faults.
In the implementation process, at least the following problems are found in the conventional technology: the traditional fault handling mode has the problems of low efficiency and poor accuracy, and potential safety hazards are easily caused.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a dynamic reactive power compensation fault detection apparatus and system capable of improving detection efficiency and accuracy.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a dynamic reactive compensation fault detection apparatus, including:
a control module;
the input end of the low-voltage circuit is used for being externally connected with a test power supply; one output end of the low-voltage circuit is used for being connected with the wire inlet side of the thyristor unit to be tested, and the other output end of the low-voltage circuit is used for being connected with the tail end side of the thyristor unit to be tested so as to conduct the thyristor unit to be tested under the condition that a test power supply is connected;
a data acquisition module; the data acquisition module is connected between the input end of the low-voltage circuit and one output end of the low-voltage circuit; the signal input end of the control module is connected with the signal output end of the data acquisition module.
In one embodiment, the method further comprises the following steps:
a power input circuit; the power input circuit is used for externally connecting a control power supply and is respectively connected with the control module and the low-voltage circuit;
the control module controls the connection of the low-voltage circuit and the test power supply when the power supply input circuit is connected with the control power supply.
In one embodiment, the power input circuit includes a first contactor; the control module comprises a second contactor;
one end of the first contactor is used for being connected to a control power supply through a corresponding switch, and the other end of the first contactor is connected to the control power supply through a normally closed contact of the second contactor; and a normally open contact of the first contactor is connected between the input end of the low-voltage circuit and the data acquisition module.
In one embodiment, the data acquisition module is a current transducer;
the control module comprises a singlechip and a voltage reduction module; the singlechip is used for being connected with a working power supply through the voltage reduction module; the single chip microcomputer is connected with the current transducer.
In one embodiment, the dynamic reactive compensation fault detection device further comprises a voltage output circuit;
the input end of the voltage output circuit is used for being externally connected with a power supply through the contact of the first contactor, and the output end of the voltage output circuit is used for being connected with a bus voltage acquisition terminal of the dynamic reactive power compensation control cabinet.
A dynamic reactive power compensation fault detection system comprises a thyristor unit to be detected and the dynamic reactive power compensation fault detection device.
In one embodiment, the thyristor unit under test comprises any thyristor valve group in the thyristor loop under test.
In one embodiment, the thyristor circuit under test includes twenty thyristor valve blocks in the TCR branch.
In one embodiment, the thyristor valve block comprises anti-parallel thyristors.
In one embodiment, the thyristor unit to be tested further comprises a current transformer and a reactor; the primary winding of the current transformer is connected with one end of the reactor through the anti-parallel thyristor.
One of the above technical solutions has the following advantages and beneficial effects:
this application includes the control module group, low-voltage circuit and data acquisition module, and then can utilize the low-voltage circuit to carry out the thyristor conduction test, utilize the trigger of thyristor to switch on the principle promptly and carry out the low pressure conduction test to the thyristor unit that awaits measuring in the thyristor return circuit, judge that whether the equipment of every unit has the trouble that can be accurate, whether can normal use, can also verify the integrality of every unit, make do not need rethread to force the power transmission after the fault handling is accomplished, force and trigger, whether to obtain the solution with the detection breakdown trouble, the efficiency of overhauing is greatly improved, the operation time of withdrawing from of dynamic reactive compensation system has been reduced, the stability of power supply system and the life of equipment have been improved. Based on the application, the fault processing time is greatly reduced, the fault finding work efficiency is improved, and the equipment power failure time is shortened. Moreover, the method and the device can be used for the same type of SVC systems of other different manufacturers, and are high in adaptability, simple to operate and convenient to carry.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a control board card in the conventional art;
FIG. 2 is a schematic structural diagram of a dynamic reactive power compensation fault detection apparatus according to an embodiment;
FIG. 3 is a schematic diagram of dividing thyristor cells under test in one embodiment;
fig. 4 is a schematic structural diagram of a dynamic reactive compensation fault detection device in another embodiment;
fig. 5 is a schematic structural diagram of a dynamic reactive power compensation fault detection apparatus according to an embodiment;
fig. 6 is an internal structural view of a thyristor unit under test in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
At present, the judgment of the SVC dynamic reactive power compensation system TCR branch circuit fault is mainly used: judging faults by an observation method and a test method, pulling out the control board card to observe whether the board card has burning traces or not, and judging whether the board card is damaged or not according to whether the board card has peculiar smell or not; and testing the forward and reverse resistance values of the thyristor by using a universal meter, and testing the thyristor with an abnormal numerical value after removing the wiring so as to judge whether the thyristor is damaged. Then, the voltage control loop of the whole TCR branch circuit of the SVC system and primary high-voltage equipment are checked one by one, and damaged accessories are replaced. After the maintenance method is completed, the fault can not be confirmed to be eliminated, and the SVC dynamic reactive power compensation system needs to be forcibly powered on and triggered to detect whether the breakdown fault is solved or not, so that potential safety hazards exist.
As shown in fig. 1, the control board card may include a cathode emitting board, an anode emitting board, a return receiving board, a communication fiber, a thyristor trigger board, a BOD (Break Over Diode) forced trigger board, and the like; the DSP board, the AD board, the IO board, and the like shown in fig. 1 may be explained using terms corresponding to those in the art.
However, when the maintainer tests each element according to practical experience and a multimeter, the fault finding time is long, the efficiency is low, the accuracy is poor, the fault processing time is long (the time for finding the fault is average to 48 hours), the working efficiency is low, the SVC dynamic reactive power compensation is stopped, and the interest rate and the fine are high. And, after the maintainer preliminarily judges, inspects, repairs, and forces power transmission and forced triggering to the SVC dynamic reactive compensation system to detect whether breakdown faults are solved, there is a potential safety hazard, because of the characteristics of the dynamic reactive compensation system, in the forced power transmission process, the system resonates to generate operation overvoltage, secondary faults are caused, other normal thyristor valve group elements breakdown is caused, even because of the generation of the operation overvoltage, the reactor is accelerated to age and burn out, the arc extinguishing capability of the circuit breaker is reduced, and the whole service efficiency and the service life of the dynamic reactive compensation system are influenced.
To this, this application proposes divide into independent unit with TCR (be thyristor valve block system) branch road twenty a group valves, then utilize the low pressure transmission conduction test that this application dynamic reactive compensation fault detection device goes on to the unit that breaks down, and then can be accurate judge whether equipment of every unit has the trouble, whether can normal use, can also verify the integrality of every unit, make do not need rethread compulsory power transmission after the fault handling is accomplished, force and trigger, whether to obtain the solution with the detection breakdown trouble, the efficiency of overhaul is greatly improved, the withdraw from operating time of dynamic reactive compensation system has been reduced, the stability of power supply system and the life of equipment have been improved. The device is used for quickly searching faults of low-voltage equipment of the SVC system and quickly processing and recovering the running of the SVC dynamic reactive power compensation device, and interest rate penalty caused by faults of TCR branches of the dynamic reactive power compensation system is reduced.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The dynamic reactive power compensation fault detection device can be applied to SVC dynamic reactive power compensation devices; among them, the SVC dynamic reactive power compensation device (FC + TCR type) may include three parts: FC filter, TCR thyristor control reactor and control protection system. The FC filter is used for providing capacitive reactive power compensation and harmonic filtering, and the TCR thyristor control reactor is used for balancing inductive reactive power generated by load fluctuation in a system. The reactive power is controlled by adjusting the size of the trigger angle of the thyristor and controlling the current flowing through the reactor. And according to the change condition of the reactive power of the load, changing the reactive power (inductive reactive power) of the reactor. That is, regardless of the variation of the reactive power of the load, the sum of the two is always made to be a constant equal to the value of the capacitive reactive power emitted by the capacitor bank, so that the reactive power taken from the grid is made to be a constant or 0, that is: and the constant (or 0) is equal to the constant, so that the power factor of the power grid is kept at a set value, and the voltage hardly fluctuates, thereby achieving the purpose of reactive compensation and inhibiting system voltage fluctuation and flicker caused by load fluctuation.
In one embodiment, as shown in fig. 2, a dynamic reactive compensation fault detection apparatus is provided, which is described by taking the method as an example for applying to an SVC, and includes:
a control module 110;
the input end of the low-voltage circuit 120 is used for being externally connected with a test power supply; one output end of the low-voltage circuit 120 is used for connecting the incoming line side of the thyristor unit to be tested, and the other output end is used for connecting the tail end side of the thyristor unit to be tested, so that the thyristor unit to be tested is conducted under the condition that a test power supply is connected;
a data acquisition module 130; the data acquisition module 130 is connected between the input end of the low-voltage circuit 120 and an output end of the low-voltage circuit 120; the signal input terminal of the control module 110 is connected to the signal output terminal of the data acquisition module 130.
Specifically, as shown in fig. 2, the dynamic reactive compensation fault detection apparatus of the present application may include a control module 110, a low voltage circuit 120, and a data acquisition module 130. Wherein, the input terminal of the low voltage circuit 120 may be used for externally connecting a test power supply (for example, an ac 380V power supply); one output end of the low-voltage circuit 120 is used for connecting the incoming line side of the thyristor unit to be tested, and the other output end is used for connecting the tail end side of the thyristor unit to be tested, so that the thyristor unit to be tested is conducted under the condition that the test power supply is connected.
In one embodiment, the thyristor unit under test comprises any thyristor valve group in the thyristor loop under test.
Specifically, the thyristor unit to be tested in the present application may be obtained by dividing valve groups of each group of TCR (i.e. thyristor valve group system) branches; in some embodiments, as shown in fig. 3, the thyristor loop to be tested may include twenty thyristor valve groups of the TCR branch, and in addition, the thyristor valve groups may include anti-parallel thyristors; the thyristor unit to be tested is obtained by dividing twenty groups of valve banks of the TCR branch circuit into independent units. Note that TA in fig. 3 denotes a current transformer.
Further, the low-voltage circuit 120 can utilize the trigger conduction principle of the thyristor, the thyristor loop of the thyristor unit to be tested is subjected to a low-voltage conduction test, namely, the low-voltage transmission conduction test is performed on the unit which breaks down, and then whether the equipment of each unit breaks down or not can be accurately judged, and whether the equipment can be normally used or not, the integrity of each unit can be verified, so that forced power transmission through rethread is not needed after fault processing is completed, forced triggering is performed, whether breakdown faults are solved or not is detected, the overhauling efficiency is greatly improved, the quitting operation time of the dynamic reactive power compensation system is reduced, and the stability of the power supply system and the service life of the equipment are improved. The method and the device achieve the purposes of rapidly processing faults and rapidly recovering the dynamic reactive power compensation device by rapidly detecting electronic elements and loops such as a fault thyristor in the SVC system.
In addition, the phase sequence connection in the dynamic reactive compensation fault detection device should be the same. Wherein, the phase sequence is connected with the inlet side of the valve group close to the front, and the other phase sequence is connected with the tail side of the valve group.
In some embodiments, the low voltage circuit 120 may be provided with a start switch, after the test wire is connected, the power supply and the input and output wires are connected, the power supply is turned on by pressing the switch after the test is correct, and the test is performed by pressing the start switch; further, this application dynamic reactive compensation fault detection device can also include display screen and control panel, and then can judge whether normal according to display screen and control panel display situation thyristor. After testing a group of thyristors, testing all thyristors according to the steps, removing and replacing fault elements after judging one by one, and testing to be qualified again, so that the dynamic reactive power compensation device can be put into use.
It should be noted that the display screen and the control screen may be a liquid crystal display screen or an electronic ink display screen, and the dynamic reactive power compensation fault detection device may further include an input device, where the input device may be a touch layer covered on the display screen, a key, a trackball or a touch pad arranged on the housing, or an external keyboard, a touch pad or a mouse.
In this application, the control module 110 may obtain data such as test parameters of the low voltage circuit 120 through the data acquisition module 130. In some embodiments, the data acquisition module may be implemented using a current transducer; the current transducer can directly convert the alternating current or direct current of the main circuit to be measured into a constant current loop standard signal output according to a linear proportion, and continuously transmit the constant current loop standard signal to the control module 110. In some embodiments, the control module 110 may include a single chip, such as a 51-chip, connected to the current transducer. In addition, the control module group can also comprise a voltage reduction module, so that the single chip microcomputer is used for being connected with a working power supply (for example, a 24V working power supply) through the voltage reduction module, and the single chip microcomputer is connected with the current transducer.
Further, the control module 110 can control the conduction between the low voltage circuit 120 and the test power supply. In one embodiment, as shown in fig. 4, the dynamic reactive compensation fault detection apparatus of the present application may further include:
a power input circuit 140; the power input circuit 140 is used for externally connecting a control power supply and is respectively connected with the control module 110 and the low-voltage circuit 120;
the control module 110 controls the power input circuit 140 to conduct the connection between the low voltage circuit 120 and the test power supply when the control power supply is connected.
Specifically, the control power supply may be a 220V power supply. Namely, in the application, a 220V power supply input by a power supply can provide a control power supply for the work of the dynamic reactive power compensation fault detection device; the input AC 380 power supply can be an external test power supply, and the output AC 380V power supply is controlled to be output to the thyristor unit to be tested by controlling the start-stop button.
In one embodiment, the power input circuit may include a first contactor; the control module may include a second contactor;
one end of the first contactor is used for being connected to a control power supply through a corresponding switch, and the other end of the first contactor is connected to the control power supply through a normally closed contact of the second contactor; and a normally open contact of the first contactor is connected between the input end of the low-voltage circuit and the data acquisition module.
Specifically, the power supply control in the present application can be implemented by using a corresponding contactor.
In one embodiment, the dynamic reactive compensation fault detection device may further include a voltage output circuit;
the input end of the voltage output circuit is used for being externally connected with a power supply through the contact of the first contactor, and the output end of the voltage output circuit is used for being connected with a bus voltage acquisition terminal of the dynamic reactive power compensation control cabinet.
Specifically, the voltage output circuit may be externally connected with a power supply, for example, a 110V power supply, and the output end of the voltage output circuit may be used for connecting a bus voltage collecting terminal of the dynamic reactive compensation control cabinet.
To further illustrate aspects of the present application, and as shown in fig. 5, the power input circuit may include a first contactor (KM1) for receiving 380V power and providing a 380V output for connecting across the valve set under test; and the control module may include a second contactor (KM 2); meanwhile, the control module can also comprise a single chip microcomputer (STC89C52) and a voltage reduction module (AC-DC voltage reduction module). The data acquisition module can be a current transmitter (FCS 521-SD-5V); and the voltage output circuit can be connected with 110V and provides a 110V output end for connecting with a bus voltage acquisition terminal of the dynamic compensation control cabinet.
In one embodiment, as shown in fig. 6, the thyristor unit under test may further include a current Transformer (TA) and a reactor (L); the primary winding of the current Transformer (TA) is connected with one end of the reactor (L) through the anti-parallel thyristor. Furthermore, the power supply can control the output alternating current 380V power supply to the thyristor and the reactor primary winding.
During the test, two groups of personnel can cooperate in the valve group room and the control room, test wires are connected according to the use instructions, a power supply and input and output wires are connected, the power supply is turned on according to a switch after the test is correct, the test is carried out according to a starting switch, and whether the thyristor is normal or not is judged according to the display conditions of the display screen and the control screen. After testing a group of thyristors, testing all thyristors according to the steps, removing and replacing fault elements after judging one by one, and testing to be qualified again, so that the dynamic reactive power compensation device can be put into use. After the practical application is put into practice in this application implementation, the fault handling time is shortened to about 4 hours by original 48 hours, reduces the use of overhauing the manpower by a wide margin, has alleviateed maintainer's intensity of labour, improves work efficiency.
Above-mentioned dynamic reactive compensation fault detection device, utilize the trigger of thyristor to switch on the principle, adopt the low voltage circuit to carry out the low pressure conduction test to the thyristor unit that awaits measuring in the thyristor return circuit, the equipment that judges out every unit that can be accurate whether has the trouble, whether can normal use, can also verify the integrality of every unit, make the fault handling do not need rethread to force the power transmission after accomplishing, force and trigger, whether to obtain the solution with the detection breakdown trouble, the efficiency of overhauing is greatly improved, the operation time of withdrawing from of dynamic reactive compensation system has been reduced, the stability of power supply system and the life of equipment have been improved. Based on the application, the fault processing time is greatly reduced, the fault finding work efficiency is improved, and the equipment power failure time is shortened. Moreover, the method and the device can be used for the same type of SVC systems of other different manufacturers, and are high in adaptability, simple to operate and convenient to carry.
In one embodiment, a dynamic reactive compensation fault detection system is provided, which includes a thyristor unit to be tested, and the dynamic reactive compensation fault detection device.
In one embodiment, the thyristor unit under test comprises any thyristor valve group in the thyristor loop under test.
In one embodiment, the thyristor circuit under test includes twenty thyristor valve blocks in the TCR branch.
In one embodiment, the thyristor valve block comprises anti-parallel thyristors.
In one embodiment, the thyristor unit to be tested further comprises a current transformer and a reactor; the primary winding of the current transformer is connected with one end of the reactor through the anti-parallel thyristor.
Specifically, the dynamic reactive compensation fault detection system of the present application may include: case, supply socket, ground terminal button, start, stop button, input test voltage, output operating mode display and display etc..
The dynamic reactive compensation fault detection system is characterized in that a thyristor is conducted by using a low-voltage circuit, low-voltage circuit components are formed into a dynamic reactive compensation fault detection device according to a designed circuit, the dynamic reactive compensation fault detection device is installed in a box body (such as an aluminum alloy box), and a thyristor unit to be detected is detected, so that the dynamic reactive compensation fault detection system is obtained, and the dynamic reactive compensation thyristor detection device is used as a dynamic reactive compensation thyristor test instrument for detecting SVC faults; as for the related structures (the to-be-tested thyristor loop, etc.) in the dynamic reactive compensation fault detection system, reference may be made to the related description of the to-be-tested thyristor unit in the foregoing, and details are not described here.
It will be understood by those skilled in the art that the configurations shown in fig. 2-6 are only block diagrams of some configurations relevant to the present disclosure, and do not constitute a limitation on the components and devices to which the present disclosure may be applied, and that particular components and devices may include more or less components than those shown, or some components may be combined, or a different arrangement of components may be provided.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A dynamic reactive compensation fault detection device, comprising:
a control module;
the input end of the low-voltage circuit is used for being externally connected with a test power supply; one output end of the low-voltage circuit is used for being connected with the wire inlet side of the thyristor unit to be tested, and the other output end of the low-voltage circuit is used for being connected with the tail end side of the thyristor unit to be tested so as to conduct the thyristor unit to be tested under the condition that the test power supply is connected;
a data acquisition module; the data acquisition module is connected between the input end of the low-voltage circuit and one output end of the low-voltage circuit; and the signal input end of the control module is connected with the signal output end of the data acquisition module.
2. The dynamic reactive compensation fault detection device of claim 1, further comprising:
a power input circuit; the power input circuit is used for being externally connected with a control power supply and is respectively connected with the control module and the low-voltage circuit;
the control module controls the power input circuit to conduct connection between the low-voltage circuit and the test power supply under the condition that the control power supply is connected.
3. The dynamic reactive compensation fault detection device of claim 2, wherein the power input circuit includes a first contactor; the control module comprises a second contactor;
one end of the first contactor is used for being connected to the control power supply through a corresponding switch, and the other end of the first contactor is connected to the control power supply through a normally closed contact of the second contactor; and the normally open contact of the first contactor is connected between the input end of the low-voltage circuit and the data acquisition module.
4. The dynamic reactive compensation fault detection device according to any one of claims 1 to 3, wherein the data acquisition module is a current transducer;
the control module comprises a singlechip and a voltage reduction module; the single chip microcomputer is used for being connected with a working power supply through the voltage reduction module; the single chip microcomputer is connected with the current transducer.
5. The dynamic reactive compensation fault detection device of claim 3, wherein the dynamic reactive compensation fault detection device further comprises a voltage output circuit;
the input end of the voltage output circuit is used for being externally connected with a power supply through the contact of the first contactor, and the output end of the voltage output circuit is used for being connected with a bus voltage acquisition terminal of the dynamic reactive power compensation control cabinet.
6. A dynamic reactive power compensation fault detection system, comprising a thyristor unit under test, and a dynamic reactive power compensation fault detection device according to any one of claims 1 to 5.
7. The dynamic reactive compensation fault detection system of claim 6, wherein the thyristor unit under test comprises any thyristor valve bank in a thyristor loop under test.
8. The dynamic reactive compensation fault detection system of claim 7, wherein the thyristor loop under test comprises twenty thyristor valve groups per TCR branch.
9. The dynamic reactive compensation fault detection system of claim 7 or 8, wherein the thyristor valve bank comprises anti-parallel thyristors.
10. The dynamic reactive compensation fault detection system of claim 9,
the thyristor unit to be tested also comprises a current transformer and a reactor; and a primary winding of the current transformer is connected with one end of the reactor through the anti-parallel thyristor.
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