CN112824918A - Device and method for detecting reclosing performance of direct-current circuit breaker - Google Patents
Device and method for detecting reclosing performance of direct-current circuit breaker Download PDFInfo
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- CN112824918A CN112824918A CN201911140941.4A CN201911140941A CN112824918A CN 112824918 A CN112824918 A CN 112824918A CN 201911140941 A CN201911140941 A CN 201911140941A CN 112824918 A CN112824918 A CN 112824918A
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- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
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Abstract
The invention discloses a device and a method for detecting reclosing performance of a direct current breaker, wherein the device comprises the following steps: the device comprises a first current source capacitor bank, a second current source capacitor bank, a high-voltage ignition ball, a first switch, a second switch, a first reactor, a second reactor and a direct-current circuit breaker. According to the embodiment of the invention, by means of the technical means that the first current source capacitor bank and the second current source capacitor bank sequentially provide the short-circuit current for the direct current breaker, the technical effect of detecting the reclosing performance of the direct current breaker after the direct current breaker is once opened and closed and the direct current breaker is opened and closed again in a short time is achieved.
Description
Technical Field
The invention relates to the field of circuit breaker performance detection, in particular to a reclosing performance detection device and method for a direct-current circuit breaker.
Background
Reclosing performance is one of important performances of the direct current circuit breaker, and in order to guarantee safe and continuous operation of a circuit system, a customer requires that the direct current circuit breaker can be switched on and off once again in a short time after the direct current circuit breaker is switched on and off once.
However, the conventional apparatus for detecting the reclosing performance of the dc circuit breaker can only provide a short-circuit current once to detect whether the dc circuit breaker can normally open the current, and cannot detect the reclosing performance of the dc circuit breaker that once opens the current and then once opens the current again in a short time.
Disclosure of Invention
In view of the above problems, the present invention provides a device and a method for detecting reclosing performance of a dc circuit breaker, which overcome or at least partially solve the above problems, and the technical solution is as follows:
a DC circuit breaker reclosing performance detection device includes: a first current source capacitor bank Cs1, a second current source capacitor bank Cs2, a high-voltage ignition ball GP1, a first switch AB1, a second switch AB2, a first reactor L1, a second reactor L2 and a direct current breaker sp,
one end of the first current source capacitor bank Cs1 is connected to one end of the high-voltage ignition ball GP1, the other end of the high-voltage ignition ball GP1 is connected to one end of the first reactor L1, the other end of the first reactor L1 is connected to one end of the first switch AB1, the other end of the first switch AB1 is connected to one end of the dc breaker sp, and the other end of the dc breaker sp is a ground end;
a common terminal of the first switch AB1 and the dc breaker sp is connected to one end of the second switch AB2, the other end of the second switch AB2 is connected to one end of the second reactor L2, the other end of the second reactor L2 is connected to one end of the second current source capacitor group Cs2, and the other end of the second current source capacitor group Cs2 is a ground terminal.
Optionally, the apparatus further comprises: the lightning conductor (P) is provided with a lightning arrester,
one end of the lightning arrester P is connected to the common end of the second switch AB2 and the direct current breaker sp, and the other end of the lightning arrester P is a grounding end.
Optionally, the apparatus further comprises: a first magnetic potentiometer CT1, a second magnetic potentiometer CT2, a third magnetic potentiometer CT3 and a resistive-capacitive voltage divider Usp,
the first magnetic potentiometer CT1 is connected to a common terminal of the second current source capacitor bank Cs2 and the dc breaker sp;
the second magnetic potentiometer CT2 is connected in series with the dc chopper sp;
the third magnetic level meter CT3 is connected in series with the lightning arrester P;
one end of the resistance-capacitance voltage divider Usp is connected with one end of the direct current breaker sp, and the other end of the resistance-capacitance voltage divider Usp is a grounding end.
Optionally, the first current source capacitor bank Cs1 is connected to a first power supply CD 1; the second current source capacitor bank Cs2 is connected to a second power supply CD 2.
Optionally, the apparatus further comprises: a controller for controlling the operation of the electronic device,
the controller is respectively connected with the high-voltage ignition ball GP1, the first switch AB1, the second switch AB2 and the direct-current breaker sp so as to respectively control the high-voltage ignition ball GP1, the first switch AB1, the second switch AB2 and the direct-current breaker sp to act at different moments.
Optionally, the controller triggers the high-pressure ignition ball GP1 to communicate at the detection start time;
the controller controls the direct current breaker sp to be in an opening state at a first moment;
the controller controls the direct current breaker sp to cut off current at a second moment;
the controller controls the first switch AB1 to be opened at a third moment;
the controller controls the second switch AB2 to close at a fourth time;
the controller controls the direct current breaker sp to be in a closing state at a fifth moment;
the controller controls the direct current breaker sp to be in an opening state at the sixth moment;
the controller controls the direct current breaker sp to cut off current at a seventh moment;
wherein the detection start time is earlier than the first time, the first time is earlier than the second time, the second time is earlier than the third time, the third time is earlier than the fourth time, the fourth time is earlier than the fifth time, the fifth time is earlier than the sixth time, and the sixth time is earlier than the seventh time.
Optionally, the apparatus further comprises:
the first switch AB1 and the second switch AB2 are auxiliary switches.
A method for detecting sp reclosing performance of a direct current breaker is applied to any one of the devices for detecting sp reclosing performance of the direct current breaker, and comprises the following steps:
when the first switch AB1 is closed, the second switch AB2 is opened, and the direct current breaker sp is in a closing state, the high-voltage ignition ball GP1 is triggered to be communicated;
controlling the direct current breaker sp to be in an opening state;
controlling the direct current breaker sp to cut off current;
controlling the first switch AB1 to be opened;
controlling the second switch AB2 to close;
controlling the direct current breaker sp to be in a closing state;
controlling the direct current breaker sp to be in an opening state;
and controlling the direct current breaker sp to break current.
Optionally, the triggering of the high-pressure ignition ball GP1 for communication includes: triggering the high-pressure ignition ball GP1 to be communicated at the detection starting moment;
the controlling the direct current breaker sp to be in an opening state includes:
controlling the direct current breaker sp to be in an opening state at a first moment;
the controlling the direct current breaker sp to break current comprises:
controlling the direct current breaker sp to cut off current at a second moment;
the controlling the first switch AB1 to open includes:
controlling the first switch AB1 to be opened at a third moment;
the controlling the second switch AB2 to close includes:
controlling the second switch AB2 to close at a fourth time;
the controlling the direct current breaker sp to be in a closing state includes:
controlling the direct current breaker sp to be in a closing state at a fifth moment;
the controlling the direct current breaker sp to be in an opening state includes:
controlling the direct current breaker sp to be in an opening state at a sixth moment;
the controlling the direct current breaker sp to break current comprises:
controlling the direct current breaker sp to cut off current at a seventh moment;
wherein the detection start time is earlier than the first time, the first time is earlier than the second time, the second time is earlier than the third time, the third time is earlier than the fourth time, the fourth time is earlier than the fifth time, the fifth time is earlier than the sixth time, and the sixth time is earlier than the seventh time.
Optionally, a time interval between the second time and the fifth time is not greater than 0.3 seconds.
By means of the technical scheme, the device and the method for detecting the reclosing performance of the direct current breaker, provided by the invention, comprise the following steps: the high-voltage ignition device comprises a first current source capacitor bank Cs1, a second current source capacitor bank Cs2, a high-voltage ignition ball GP1, a first switch AB1, a second switch AB2, a first reactor L1, a second reactor L2 and a direct-current breaker sp. According to the technical means for sequentially providing the short-circuit current to the direct current breaker sp, the embodiment of the invention achieves the technical effect of detecting the reclosing performance of the direct current breaker sp for switching off the current once again in a short time after the direct current breaker sp switches off the current once through the first current source capacitor bank Cs1 and the second current source capacitor bank Cs 2.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a connection diagram illustrating components of a reclosing performance detection device of a dc circuit breaker according to an embodiment of the present invention;
fig. 2 is a connection diagram illustrating components of another apparatus for detecting reclosing performance of a dc circuit breaker according to an embodiment of the present invention;
fig. 3 is a connection diagram illustrating components of another apparatus for detecting reclosing performance of a dc circuit breaker according to an embodiment of the present invention;
fig. 4 is a connection diagram illustrating components of another apparatus for detecting reclosing performance of a dc circuit breaker according to an embodiment of the present invention;
fig. 5 shows a schematic flow chart of a method for detecting the reclosing performance of the dc circuit breaker according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, a reclosing performance detection device of a dc circuit breaker according to an embodiment of the present invention may include: the high-voltage ignition device comprises a first current source capacitor bank Cs1, a second current source capacitor bank Cs2, a high-voltage ignition ball GP1, a first switch AB1, a second switch AB2, a first reactor L1, a second reactor L2 and a direct-current breaker sp.
One end of the first current source capacitor bank Cs1 is connected to one end of the high-voltage ignition ball GP1, the other end of the high-voltage ignition ball GP1 is connected to one end of the first reactor L1, the other end of the first reactor L1 is connected to one end of the first switch AB1, the other end of the first switch AB1 is connected to one end of the dc breaker sp, and the other end of the dc breaker sp is a ground end.
A common terminal of the first switch AB1 and the dc breaker sp is connected to one end of the second switch AB2, the other end of the second switch AB2 is connected to one end of the second reactor L2, the other end of the second reactor L2 is connected to one end of the second current source capacitor group Cs2, and the other end of the second current source capacitor group Cs2 is a ground terminal.
The device for detecting the sp reclosing performance of the direct current breaker is used for detecting the sp reclosing performance of the direct current breaker. The first current source capacitor bank Cs1 and the first reactor L1 form a low-frequency oscillation circuit or a power-frequency oscillation circuit. The second current source capacitor bank Cs2 and the second reactor L2 form a low-frequency oscillation circuit or a power-frequency oscillation circuit. The first reactor L1 and the second reactor L2 may both be high voltage reactors.
The high-pressure ignition ball GP1 is also known as an ignition ball, a protective gap or a protective ball gap. The high-voltage ignition ball GP1 can be composed of a high-voltage insulator, a graphite ball gap and a high-voltage igniter. The embodiment of the invention can be communicated through the high-voltage ignition ball GP1, so that the first current source capacitor group Cs1 provides primary short-circuit current for the direct-current breaker sp in the detection of the reclosing performance of the direct-current breaker sp.
It is to be noted that when the first current source capacitor bank Cs1 supplies a short-circuit current to the dc breaker sp, the first switch AB1 is closed and the second switch AB2 is open. When the second current source capacitor bank Cs2 supplies a short-circuit current to the direct current breaker sp, the second switch AB2 is closed and the first switch AB1 is opened. When the first switch AB1 is closed and the second switch AB2 is opened, the high-voltage ignition bulb GP1 is connected, so that the first current source capacitor group Cs1 outputs a short-circuit current to the first reactor L1, the first reactor L1 limits the short-circuit current, the short-circuit current finally flowing to the direct current breaker sp does not exceed the rated short-circuit breaking current of the direct current breaker sp, and the direct current breaker sp recloses under the short-circuit current output by the first current source capacitor group. After the dc breaker sp completes one reclosing, the first switch AB1 is opened and the second switch AB2 is closed within 0.3 second, so that the second current source capacitor group Cs2 outputs a short-circuit current to the second reactor L2, and the second reactor L2 limits the short-circuit current, so that the short-circuit current finally flowing to the dc breaker sp does not exceed the rated short-circuit breaking current of the dc breaker sp. The dc breaker sp is reclosed by the short-circuit current outputted from the second current source capacitor group Cs 2. Therefore, the reclosing performance detection device for the direct-current circuit breaker provided by the embodiment of the invention can detect the performance that the direct-current circuit breaker sp continuously recloses the short-circuit current in a short time. Compared with a detection device with only one current source capacitor bank, the detection device provided by the embodiment of the invention saves the time for charging the current source capacitor bank before the current source capacitor bank provides the second short-circuit current, and can provide the second short-circuit current for the direct current breaker sp within 0.3 second after the direct current breaker sp provides the first short-circuit current and the direct current breaker sp carries out the reclosing once, so as to detect the performance that the direct current breaker sp continuously carries out the reclosing on the short-circuit current within a short time.
The reclosing performance detection device for the direct current breaker provided by the embodiment of the invention can comprise: the high-voltage ignition device comprises a first current source capacitor bank Cs1, a second current source capacitor bank Cs2, a high-voltage ignition ball GP1, a first switch AB1, a second switch AB2, a first reactor L1, a second reactor L2 and a direct-current breaker sp. According to the technical means for sequentially providing the short-circuit current to the direct current breaker sp, the embodiment of the invention achieves the technical effect of detecting the reclosing performance of the direct current breaker sp for switching off the current once again in a short time after the direct current breaker sp switches off the current once through the first current source capacitor bank Cs1 and the second current source capacitor bank Cs 2.
Optionally, as shown in fig. 2, another apparatus for detecting reclosing performance of a dc circuit breaker according to an embodiment of the present invention may further include: and a lightning arrester P.
One end of the lightning arrester P is connected to the common end of the second switch AB2 and the direct current breaker sp, and the other end of the lightning arrester P is a grounding end.
The lightning arrester P is a device for protecting other devices in the detection apparatus provided by the embodiment of the present invention from high transient overvoltage.
Optionally, as shown in fig. 3, another apparatus for detecting reclosing performance of a dc circuit breaker according to an embodiment of the present invention may further include: a first magnetic potentiometer CT1, a second magnetic potentiometer CT2, a third magnetic potentiometer CT3 and a resistive-capacitive voltage divider Usp.
The first magnetic level meter CT1 is connected to a common terminal of the second current source capacitor bank Cs2 and the dc breaker sp.
The first magnetic level meter CT1 is used to measure the short-circuit current output by the first current source capacitor bank Cs1 or the second current source capacitor bank Cs 2.
The second magnetic level meter CT2 is connected in series with the dc breaker sp.
Wherein the second magnetic level meter CT2 is used to measure the current flowing through the direct current breaker sp,
the third magnetic level gauge CT3 is connected in series with the lightning arrester P.
The third magnetic level gauge CT3 is used to measure the current when the dc breaker sp recloses.
One end of the resistance-capacitance voltage divider Usp is connected with one end of the direct current breaker sp, and the other end of the resistance-capacitance voltage divider Usp is a grounding end.
The resistance-capacitance voltage divider Usp refers to a voltage divider formed by combining a resistor and a capacitor. The resistance-capacitance voltage divider Usp is used for weakening the influence on stray capacitance to the ground and improving the accuracy of the measurement result of the magnetic potentiometer.
Optionally, as shown in fig. 4, in another apparatus for detecting sp reclosing performance of a dc circuit breaker according to an embodiment of the present invention, the first current source capacitor bank Cs1 is connected to a first power supply CD 1; the second current source capacitor bank Cs2 is connected to a second power supply CD 2.
In practical application of the embodiment of the invention, before detecting the sp reclosing performance of the direct current breaker, the power supply can charge the current source capacitor bank, so that the current source capacitor bank can output short-circuit current in the detection process.
Optionally, another apparatus for detecting reclosing performance of a dc circuit breaker according to an embodiment of the present invention may further include: and a controller.
The controller is respectively connected with the high-voltage ignition ball GP1, the first switch AB1, the second switch AB2 and the direct-current breaker sp so as to respectively control the high-voltage ignition ball GP1, the first switch AB1, the second switch AB2 and the direct-current breaker sp to act at different moments.
Optionally, the controller triggers the high-pressure ignition ball GP1 to communicate at the start of detection.
The controller controls the direct current breaker sp to be in an opening state at a first moment.
And the controller controls the direct current breaker sp to break the current at a second moment.
The controller controls the first switch AB1 to open at a third time.
The controller controls the second switch AB2 to close at a fourth time.
And the controller controls the direct current breaker sp to be in a closing state at the fifth moment.
And the controller controls the direct current breaker sp to be in an opening state at the sixth moment.
And the controller controls the direct current breaker sp to break the current at a seventh moment.
Wherein the detection start time is earlier than the first time, the first time is earlier than the second time, the second time is earlier than the third time, the third time is earlier than the fourth time, the fourth time is earlier than the fifth time, the fifth time is earlier than the sixth time, and the sixth time is earlier than the seventh time.
It is understood that the controller may be configured to send an action command corresponding to a specified time to the corresponding device at the specified time, so that the device performs a corresponding action according to the action command. Wherein, each time can be set according to the actual detection requirement.
Optionally, the method may further include:
the first switch AB1 and the second switch AB2 are relay switches.
Corresponding to the above device embodiment, an sp reclosing performance detection method for a direct current breaker according to an embodiment of the present invention is applied to any one of the above sp reclosing performance detection devices for a direct current breaker, and as shown in fig. 5, the method may include:
s100, when the first switch AB1 is closed, the second switch AB2 is opened, and the direct current breaker sp is in a closing state, the high-voltage ignition ball GP1 is triggered to be communicated.
And S200, controlling the direct current breaker sp to be in an opening state.
And S300, controlling the direct current breaker sp to break current.
And S400, controlling the first switch AB1 to be turned off.
And S500, controlling the second switch AB2 to be closed.
And S600, controlling the direct current breaker sp to be in a closing state.
And S700, controlling the direct current breaker sp to be in an opening state.
And S800, controlling the direct current breaker sp to break current.
Specifically, when the first switch AB1 is closed, the second switch AB2 is opened, and the dc breaker sp is in a closed state, the high-voltage ignition ball GP1 is triggered to be turned on, and then the first current source capacitor bank Cs1 supplies short-circuit current to the dc breaker sp. After the first switch AB1 is controlled to be opened and the second switch AB2 is controlled to be closed, the short-circuit current is supplied to the dc breaker sp from the second current source capacitor bank Cs 2. According to the embodiment of the invention, the first current source capacitor group Cs1 is used for providing the short-circuit current for the direct current breaker sp, and after the direct current breaker sp finishes the primary cut-off current, the second current source capacitor group Cs2 is used for providing the short-circuit current for the direct current breaker sp, so that the reclosing performance of the primary cut-off current can be detected within a short time after the direct current breaker sp cuts off the current once.
The detection method for the reclosing performance of the direct current breaker is applied to any detection device for the reclosing performance of the direct current breaker sp, and can trigger the high-voltage ignition ball GP1 to be communicated when the first switch AB1 is closed, the second switch AB2 is disconnected and the direct current breaker sp is in a closing state; controlling the direct current breaker sp to be in an opening state; controlling the direct current breaker sp to cut off current; controlling the first switch AB1 to be opened; controlling the second switch AB2 to close; controlling the direct current breaker sp to be in a closing state; controlling the direct current breaker sp to be in an opening state; and controlling the direct current breaker sp to break current. According to the technical means for sequentially providing the short-circuit current to the direct current breaker sp, the embodiment of the invention achieves the technical effect of detecting the reclosing performance of the direct current breaker sp for switching off the current once again in a short time after the direct current breaker sp switches off the current once through the first current source capacitor bank Cs1 and the second current source capacitor bank Cs 2.
Optionally, step S100 may include:
and triggering the high-pressure ignition ball GP1 to be communicated at the detection starting moment.
Step S200 may include:
and controlling the direct current breaker sp to be in an opening state at a first moment.
Step S300 may include:
and controlling the direct current breaker sp to break the current at a second moment.
Step S400 may include:
the first switch AB1 is controlled to open at a third moment in time.
Step S500 may include:
the second switch AB2 is controlled to close at a fourth time.
Step S600 may include:
and controlling the direct current breaker sp to be in a closing state at a fifth moment.
Step S700 may include:
and controlling the direct current breaker sp to be in an opening state at the sixth moment.
Step S800 may include:
and controlling the direct current breaker sp to break the current at a seventh moment.
Wherein the detection start time is earlier than the first time, the first time is earlier than the second time, the second time is earlier than the third time, the third time is earlier than the fourth time, the fourth time is earlier than the fifth time, the fifth time is earlier than the sixth time, and the sixth time is earlier than the seventh time.
Optionally, a time interval between the second time and the fifth time is not greater than 0.3 seconds.
It can be understood that by controlling the time interval between the second time and the fifth time to be not more than 0.3 seconds, so that the direct current breaker sp starts to deliver the short-circuit current to the direct current breaker sp within 0.3 seconds after the direct current breaker sp once opens the current, the reclosing performance of the direct current breaker sp can be detected, wherein the reclosing performance of the direct current breaker sp opens the current again within a short time after the direct current breaker sp once opens the current.
Optionally, after step S800, an oscillogram of a process in which the dc breaker sp opens the current twice may be obtained in the embodiment of the present invention. According to the embodiment of the invention, whether the reclosing performance of the direct current breaker sp reaches the preset standard reclosing performance can be judged according to the oscillogram.
Specifically, in the embodiment of the present invention, the oscillogram may be compared with a standard oscillogram, and when a comparison result of the oscillogram and the standard oscillogram is within an error range, it is determined that the reclosing performance of the dc circuit breaker sp reaches a preset standard reclosing performance. It should be noted that the oscillogram of the dc breaker sp that achieves the preset standard reclosing performance in the two current breaking processes is a standard oscillogram.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a direct current breaker reclosing performance detection device which characterized in that includes: a first current source capacitor bank (Cs1), a second current source capacitor bank (Cs2), a high-voltage ignition ball (GP1), a first switch (AB1), a second switch (AB2), a first reactor (L1), a second reactor (L2) and a direct current breaker (sp),
one end of the first current source capacitor bank (Cs1) is connected to one end of the high-voltage ignition ball (GP1), the other end of the high-voltage ignition ball (GP1) is connected to one end of the first reactor (L1), the other end of the first reactor (L1) is connected to one end of the first switch (AB1), the other end of the first switch (AB1) is connected to one end of the dc breaker (sp), and the other end of the dc breaker (sp) is a ground end;
the common terminal of the first switch (AB1) and the dc breaker (sp) is connected to one terminal of the second switch (AB2), the other terminal of the second switch (AB2) is connected to one terminal of the second reactor (L2), the other terminal of the second reactor (L2) is connected to one terminal of the second current source capacitor group (Cs2), and the other terminal of the second current source capacitor group (Cs2) is a ground terminal.
2. The apparatus of claim 1, further comprising: a lightning arrester (P) which is provided with a lightning arrester,
one end of the lightning arrester (P) is connected to the common end of the second switch (AB2) and the direct current breaker (sp), and the other end of the lightning arrester (P) is a grounding end.
3. The apparatus of claim 2, further comprising: a first magnetic potentiometer (CT1), a second magnetic potentiometer (CT2), a third magnetic potentiometer (CT3) and a resistive-capacitive voltage divider (Usp),
-the first magnetic potentiometer (CT1) is connected at the common terminal of the second current source capacitor bank (Cs2) and the dc breaker (sp);
the second magnetic potentiometer (CT2) is connected in series with the direct current breaker (sp);
the third magnetic level gauge (CT3) is connected in series with the lightning arrester (P);
one end of the resistance-capacitance voltage divider (Usp) is connected with one end of the direct current breaker (sp), and the other end of the resistance-capacitance voltage divider (Usp) is a grounding end.
4. The arrangement according to claim 1, characterized in that the first current source capacitor bank (Cs1) is connected to a first power supply (CD 1); the second current source capacitor bank (Cs2) is connected to a second power supply (CD 2).
5. The apparatus of claim 1, further comprising: a controller for controlling the operation of the electronic device,
the controller is respectively connected with the high-voltage ignition ball (GP1), the first switch (AB1), the second switch (AB2) and the direct current breaker (sp) so as to respectively control the high-voltage ignition ball (GP1), the first switch (AB1), the second switch (AB2) and the direct current breaker (sp) to act at different moments.
6. The device as claimed in claim 5, characterized in that the controller triggers the high-pressure ignition ball (GP1) to communicate at the start of detection;
the controller controls the direct current breaker (sp) to be in an opening state at a first moment;
the controller controls the direct current breaker (sp) to cut off current at a second moment;
the controller controls the first switch (AB1) to be turned off at a third moment;
the controller controls the second switch (AB2) to close at a fourth time;
the controller controls the direct current breaker (sp) to be in a closing state at a fifth moment;
the controller controls the direct current breaker (sp) to be in an opening state at a sixth moment;
the controller controls the direct current breaker (sp) to cut off current at a seventh moment;
wherein the detection start time is earlier than the first time, the first time is earlier than the second time, the second time is earlier than the third time, the third time is earlier than the fourth time, the fourth time is earlier than the fifth time, the fifth time is earlier than the sixth time, and the sixth time is earlier than the seventh time.
7. The apparatus of claim 5 or 6, further comprising:
the first switch (AB1) and the second switch (AB2) are auxiliary switches.
8. A method for detecting reclosing performance of a dc circuit breaker, the method being applied to the apparatus for detecting reclosing performance of a dc circuit breaker according to any one of claims 1 to 7, the method comprising:
triggering the high-voltage ignition ball (GP1) to be communicated when the first switch (AB1) is closed, the second switch (AB2) is opened and the direct current breaker (sp) is in a closing state;
controlling the direct current breaker (sp) to be in an opening state;
controlling the direct current breaker (sp) to switch off the current;
-controlling the first switch (AB1) to open;
controlling the second switch (AB2) to close;
controlling the direct current breaker (sp) to be in a closing state;
controlling the direct current breaker (sp) to be in an opening state;
controlling the direct current breaker (sp) to break current.
9. The method of claim 8, wherein said triggering said high pressure ignition ball (GP1) communication comprises: triggering the high-pressure ignition ball (GP1) to be communicated at the detection starting moment;
the control of the direct current breaker (sp) in an open state comprises:
controlling the direct current breaker (sp) to be in an opening state at a first moment;
the control of the direct current breaker (sp) to break the current comprises:
controlling the direct current breaker (sp) to switch off the current at a second moment;
the controlling the first switch (AB1) to open comprises:
-controlling the first switch (AB1) to open at a third moment in time;
the controlling of the second switch (AB2) to close comprises:
controlling the second switch (AB2) to close at a fourth time;
the controlling the direct current breaker (sp) to be in a closing state includes:
controlling the direct current breaker (sp) to be in a closing state at a fifth moment;
the control of the direct current breaker (sp) in an open state comprises:
controlling the direct current breaker (sp) to be in an opening state at a sixth moment;
the control of the direct current breaker (sp) to break the current comprises:
controlling the direct current breaker (sp) to break current at a seventh moment;
wherein the detection start time is earlier than the first time, the first time is earlier than the second time, the second time is earlier than the third time, the third time is earlier than the fourth time, the fourth time is earlier than the fifth time, the fifth time is earlier than the sixth time, and the sixth time is earlier than the seventh time.
10. The method of claim 9, wherein the second time is separated from the fifth time by no more than 0.3 seconds.
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