CN213521294U - Adjustable anti-burning type damping resistance protection device with arc suppression coils connected in series - Google Patents
Adjustable anti-burning type damping resistance protection device with arc suppression coils connected in series Download PDFInfo
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- CN213521294U CN213521294U CN202022357813.XU CN202022357813U CN213521294U CN 213521294 U CN213521294 U CN 213521294U CN 202022357813 U CN202022357813 U CN 202022357813U CN 213521294 U CN213521294 U CN 213521294U
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- suppression coil
- damping
- vacuum contactor
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Abstract
The utility model discloses an arc suppression coil series connection is adjustable prevents burning type damping resistance protection device belongs to arc suppression coil technical field, include: the JDK arc suppression coil controller is internally provided with an HG alarm lamp; the output end of the normally closed vacuum contactor is connected with the input end of the normally closed vacuum contactor J1; the damping resistance adjusting mechanism is connected with the normally closed vacuum contactor J1 in parallel, and the output end of the resistance adjusting mechanism is connected with the GND end; one end of the secondary side of the current transformer is connected with a GND end, and the other end of the secondary side of the current transformer is connected with the input end of the JDK arc suppression coil controller; the resistance adjusting mechanism is connected with the input end of the arc suppression coil, and the output end of the arc suppression coil is connected with the neutral point; and the output end of the arc suppression coil is connected with one end on the primary side of the voltage transformer PT, and the other end on the primary side of the voltage transformer PT is connected with the GND end.
Description
Technical Field
The utility model relates to an arc suppression coil technical field, more specifically say, relate to adjustable anti-burning type damping resistance protection device of arc suppression coil series connection.
Background
The arc suppression coil is an inductance coil with an iron core, and a power system neutral point grounding system passing through the arc suppression coil is formed between a neutral point of a 6-66 medium-voltage power grid and the ground, and is also the most common grounding protection mode of the power system in China at present.
The pre-adjusting arc suppression coil is the most common and reliable grounding mode in an arc suppression coil grounding system, because the arc suppression coil is pre-adjusted in a working mode, that is, when the system is in a normal operation state without single-phase grounding, the arc suppression coil automatically adjusts an inductance value to a gear close to a capacitance value of the system according to intelligent measurement of a controller, so that reasonable compensation can be realized when the system has single-phase grounding fault, but when the system has no grounding fault, series resonance overvoltage is easily generated in the system because the inductance value is close to the capacitance value, in order to prevent the generation of the situation, a damping resistor is generally connected in series in a primary side loop of the arc suppression coil, the connection method is called as an arc suppression coil series resistance damping method, but when the control loop fault occurs in actual operation and the series damping resistor is grounded to be damaged by overlarge current, the system is easy to generate arc voltage to damage the whole system, so that the reliable operation of the damping device becomes a good operation foundation guarantee of the whole set of automatic arc extinction grounding device.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved
To the problem that exists among the prior art, the utility model aims to provide an arc suppression coil establishes ties and is adjustable prevent fever type damping resistance protection device.
2. Technical scheme
In order to solve the above problem, the utility model adopts the following technical scheme:
arc suppression coil establishes ties adjustable anti-burning type damping resistance protection device includes:
the JDK arc suppression coil controller is internally provided with an HG alarm lamp;
a normally closed vacuum contactor J1, an output end of the normally closed vacuum contactor being connected with an input end of the normally closed vacuum contactor J1;
the damping resistance adjusting mechanism is connected with the normally closed vacuum contactor J1 in parallel, and the output end of the resistance adjusting mechanism is connected with the GND end;
one end of the secondary side of the current transformer is connected with a GND end, and the other end of the secondary side of the current transformer is connected with the input end of a JDK arc suppression coil controller;
the resistance adjusting mechanism is connected with the input end of the arc suppression coil, and the output end of the arc suppression coil is connected with a neutral point;
the output end of the arc suppression coil is connected with one end of the primary side of the voltage transformer PT, the other end of the primary side of the voltage transformer PT is connected with a GND end, one end of the secondary side of the voltage transformer PT is connected with the input end of the JDK arc suppression coil controller, and the other end of the secondary side of the voltage transformer PT is connected with the GND end; and
and the other end of the secondary side of the current transformer CT and the other end of the secondary side of the current transformer PT are connected with the input end of a damping switching control box TQ, and the output end of the damping switching control box TQ is connected with the input end of a normally-closed vacuum contactor J1.
As a preferable scheme of the utility model, damping resistance adjustment mechanism includes damping resistance R1, damping resistance R2 and normally closed type vacuum contactor G1, damping resistance R1 is parallelly connected with damping resistance R2, normally closed type vacuum contactor G1 establishes ties with damping resistance R1.
As a preferable scheme of the utility model, damping resistance adjustment mechanism includes damping resistance R1, damping resistance R2 and normally closed type vacuum contactor G1, damping resistance R1 establishes ties with damping resistance R2, normally closed type vacuum contactor G1 is parallelly connected with damping resistance R2.
As the utility model discloses an optimal selection scheme still includes the three-phase voltage end, the output of three-phase voltage end is connected with the input of JDK arc suppression coil controller.
3. Advantageous effects
Compared with the prior art, the utility model has the advantages of:
(1) the utility model discloses the short circuit protection return circuit is single normally closed contactor J1 control, greatly prevents to burn the emergence of damping resistance adjustment mechanism accident, simple safe and reliable.
(2) The utility model discloses the action protection is that Io \ UO \ K1 many signal circuit repeated start control 3 unifications are more insurance.
(3) The utility model discloses can realize the major loop malfunction alerting, in time disappear the shortcoming.
(4) The utility model discloses can realize that damping resistance value can online adjustment, it is more convenient not need the power failure operation.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment 1 of the adjustable anti-burning type damping resistor protection device with series arc suppression coils of the utility model;
fig. 2 is a schematic circuit diagram of an embodiment 2 of the adjustable anti-burning type damping resistor protection device with series arc suppression coils of the utility model;
FIG. 3 is a schematic circuit diagram of a main control loop in the arc suppression coil series adjustable anti-burning damping resistor protection device of the present invention;
fig. 4 is a schematic circuit diagram of the alarm loop in the adjustable anti-burning damping resistor protection device with series arc suppression coils.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, the arc suppression coil series connection adjustable anti-burning type damping resistor protection device includes:
the JDK arc suppression coil controller is internally provided with an HG alarm lamp;
the output end of the normally closed vacuum contactor is connected with the input end of the normally closed vacuum contactor J1;
the damping resistance adjusting mechanism is connected with the normally-closed vacuum contactor J1 in parallel, the output end of the resistance adjusting mechanism is connected with the GND end, the damping resistance adjusting mechanism comprises a damping resistor R1, a damping resistor R2 and a normally-closed vacuum contactor G1, the damping resistor R1 is connected with a damping resistor R2 in parallel, and the normally-closed vacuum contactor G1 is connected with a damping resistor R1 in series;
one end of the secondary side of the current transformer is connected with a GND end, and the other end of the secondary side of the current transformer is connected with the input end of the JDK arc suppression coil controller;
the resistance adjusting mechanism is connected with the input end of the arc suppression coil, and the output end of the arc suppression coil is connected with the neutral point;
the output end of the arc suppression coil is connected with one end of the primary side of the voltage transformer PT, the other end of the primary side of the voltage transformer PT is connected with a GND end, one end of the secondary side of the voltage transformer PT is connected with the input end of the JDK arc suppression coil controller, and the other end of the secondary side of the voltage transformer PT is connected with the GND end; and
the other end of the secondary side of the current transformer CT and the other end of the secondary side of the current transformer PT are connected with the input end of a damping switching control box TQ, and the output end of the damping switching control box TQ is connected with the input end of a normally-closed vacuum contactor J1;
the output end of the three-phase voltage end is connected with the input end of the JDK arc suppression coil controller;
when the JDK arc suppression coil controller introduces voltage series negative feedback and current series negative feedback, please refer to fig. 3, a main control loop is formed at this time
When voltage series-parallel negative feedback and current parallel negative feedback are introduced into the JDK arc suppression coil controller, please refer to FIG. 4, an alarm loop is formed at this time, and alarm can be realized;
the utility model discloses at first protect damping resistance R1 and damping resistance R2 through single normally closed vacuum contactor J1, lean on its trouble to lose the characteristic that the normal close state is in automatically when electric ageing damage to protect damping resistance R1 and damping resistance R2 can not have the circumstances that the heavy current passes through the burning damping resistance adjustment mechanism when the system ground connection; secondly, grounding signals are respectively adopted from the zero sequence voltage current and a system bus to ensure the reliability of the action so as to ensure the reliability of the instruction; a third pair of JDK arc suppression coil controllers adopt corresponding logic loops to send alarm signals to the operation and inspection personnel in the fault state; finally, the normally closed vacuum contactor G1 is added to control and adjust the resistance value of the ground resistor in an online mode for the damping resistor R1 and the damping resistor R2, different requirements of the arc extinction system on the asymmetrical height of the power grid are better met, and 5-10 ohm adjustment can be achieved in the embodiment.
Example 2:
referring to fig. 1, the arc suppression coil series connection adjustable anti-burning type damping resistor protection device includes:
the JDK arc suppression coil controller is internally provided with an HG alarm lamp;
the output end of the normally closed vacuum contactor is connected with the input end of the normally closed vacuum contactor J1;
the damping resistance adjusting mechanism is connected with the normally-closed vacuum contactor J1 in parallel, the output end of the resistance adjusting mechanism is connected with the GND end, the damping resistance adjusting mechanism comprises a damping resistor R1, a damping resistor R2 and a normally-closed vacuum contactor G1, the damping resistor R1 is connected with a damping resistor R2 in series, and the normally-closed vacuum contactor G1 is connected with a damping resistor R2 in parallel;
one end of the secondary side of the current transformer is connected with a GND end, and the other end of the secondary side of the current transformer is connected with the input end of the JDK arc suppression coil controller;
the resistance adjusting mechanism is connected with the input end of the arc suppression coil, and the output end of the arc suppression coil is connected with the neutral point;
the output end of the arc suppression coil is connected with one end of the primary side of the voltage transformer PT, the other end of the primary side of the voltage transformer PT is connected with a GND end, one end of the secondary side of the voltage transformer PT is connected with the input end of the JDK arc suppression coil controller, and the other end of the secondary side of the voltage transformer PT is connected with the GND end; and
the other end of the secondary side of the current transformer CT and the other end of the secondary side of the current transformer PT are connected with the input end of a damping switching control box TQ, and the output end of the damping switching control box TQ is connected with the input end of a normally-closed vacuum contactor J1;
the output end of the three-phase voltage end is connected with the input end of the JDK arc suppression coil controller;
when the JDK arc suppression coil controller introduces voltage series negative feedback and current series negative feedback, please refer to fig. 3, a main control loop is formed at this time
When voltage series-parallel negative feedback and current parallel negative feedback are introduced into the JDK arc suppression coil controller, please refer to FIG. 4, an alarm loop is formed at this time, and alarm can be realized;
the utility model discloses at first protect damping resistance R1 and damping resistance R2 through single normally closed vacuum contactor J1, lean on its trouble to lose the characteristic that the normal close state is in automatically when electric ageing damage to protect damping resistance R1 and damping resistance R2 can not have the circumstances that the heavy current passes through the burning damping resistance adjustment mechanism when the system ground connection; secondly, grounding signals are respectively adopted from the zero sequence voltage current and a system bus to ensure the reliability of the action so as to ensure the reliability of the instruction; a third pair of JDK arc suppression coil controllers adopt corresponding logic loops to send alarm signals to the operation and inspection personnel in the fault state; finally, the normally closed vacuum contactor G1 is added to control the resistance value of the ground resistor in an online mode to the damping resistor R1 and the damping resistor R2, different requirements of the arc extinction system on the asymmetrical height of the power grid are better met, and 10-20 ohm adjustment can be achieved in the embodiment.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.
Claims (4)
1. Arc suppression coil establishes ties adjustable anti-burning type damping resistance protection device, its characterized in that includes:
the JDK arc suppression coil controller is internally provided with an HG alarm lamp;
a normally closed vacuum contactor J1, an output end of the normally closed vacuum contactor being connected with an input end of the normally closed vacuum contactor J1;
the damping resistance adjusting mechanism is connected with the normally closed vacuum contactor J1 in parallel, and the output end of the resistance adjusting mechanism is connected with the GND end;
one end of the secondary side of the current transformer is connected with a GND end, and the other end of the secondary side of the current transformer is connected with the input end of a JDK arc suppression coil controller;
the resistance adjusting mechanism is connected with the input end of the arc suppression coil, and the output end of the arc suppression coil is connected with a neutral point;
the output end of the arc suppression coil is connected with one end of the primary side of the voltage transformer PT, the other end of the primary side of the voltage transformer PT is connected with a GND end, one end of the secondary side of the voltage transformer PT is connected with the input end of the JDK arc suppression coil controller, and the other end of the secondary side of the voltage transformer PT is connected with the GND end; and
and the other end of the secondary side of the current transformer CT and the other end of the secondary side of the current transformer PT are connected with the input end of a damping switching control box TQ, and the output end of the damping switching control box TQ is connected with the input end of a normally-closed vacuum contactor J1.
2. An arc suppression coil series adjustable anti-burning type damping resistance protection device as claimed in claim 1, wherein said damping resistance adjustment mechanism comprises a damping resistor R1, a damping resistor R2 and a normally closed vacuum contactor G1, said damping resistor R1 is connected in parallel with a damping resistor R2, said normally closed vacuum contactor G1 is connected in series with a damping resistor R1.
3. An arc suppression coil series adjustable anti-burning type damping resistance protection device as claimed in claim 1, wherein said damping resistance adjustment mechanism comprises a damping resistor R1, a damping resistor R2 and a normally closed vacuum contactor G1, said damping resistor R1 is connected in series with a damping resistor R2, said normally closed vacuum contactor G1 is connected in parallel with a damping resistor R2.
4. An arc suppression coil series adjustable anti-burning type damping resistor protection device according to claim 1, further comprising a three-phase voltage terminal, an output terminal of the three-phase voltage terminal being connected with an input terminal of a JDK arc suppression coil controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022357813.XU CN213521294U (en) | 2020-10-21 | 2020-10-21 | Adjustable anti-burning type damping resistance protection device with arc suppression coils connected in series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022357813.XU CN213521294U (en) | 2020-10-21 | 2020-10-21 | Adjustable anti-burning type damping resistance protection device with arc suppression coils connected in series |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213521294U true CN213521294U (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022357813.XU Active CN213521294U (en) | 2020-10-21 | 2020-10-21 | Adjustable anti-burning type damping resistance protection device with arc suppression coils connected in series |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213521294U (en) |
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- 2020-10-21 CN CN202022357813.XU patent/CN213521294U/en active Active
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