CN108872840B - A simulated circuit breaker - Google Patents
A simulated circuit breaker Download PDFInfo
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- CN108872840B CN108872840B CN201810435204.6A CN201810435204A CN108872840B CN 108872840 B CN108872840 B CN 108872840B CN 201810435204 A CN201810435204 A CN 201810435204A CN 108872840 B CN108872840 B CN 108872840B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- 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
- G01R31/3272—Apparatus, systems or circuits therefor
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Abstract
本发明所述的模拟断路器，适用于简易测试电路，包括控制电源以及与所述控制电源连接的合闸控制回路、分闸控制回路、防跳回路、合闸指示回路、分闸指示回路和接触器控制回路；所述合闸控制回路、所述分闸控制回路、所述合闸指示回路、所述分闸指示回路和所述接触器控制回路依次并联；本发明采用分闸继电器动合接点跨接于合闸控制回路与分闸控制回路之间，完成防跳功能，简化了电路设计；在提出的合闸控制回路的新电路设计原理中，采用合闸继电器动合触点的实现自保持，采用分闸继电器动断接点实现合闸闭锁；在提出的分闸控制回路的新电路设计原理中，采用手动分闸按钮或外部继电保护装置启动分闸。
The simulated circuit breaker of the present invention is suitable for a simple test circuit, including a control power supply and a closing control circuit connected to the control power supply, an opening control circuit, an anti-jumping circuit, a closing indicating circuit, an opening indicating circuit and Contactor control loop; the closing control loop, the opening control loop, the closing indication loop, the opening indication loop and the contactor control loop are sequentially connected in parallel; the present invention uses an opening relay to move and close The contact is bridged between the closing control circuit and the opening control circuit to complete the anti-jump function and simplify the circuit design; in the proposed new circuit design principle of the closing control circuit, the realization of the closing contact of the closing relay is adopted Self-holding, using the opening relay contact point to realize the closing lock; in the proposed new circuit design principle of the opening control circuit, the manual opening button or external relay protection device is used to start the opening.
Description
Technical Field
The invention relates to the technical field of integrated circuits, in particular to a simple test simulation circuit breaker.
Background
The circuit breaker is one of the most important and complex electric devices in the high-voltage switch equipment of the power system, can switch on and off load current during normal operation, and can rapidly switch off short-circuit current under the action of relay protection when the system has a fault, so that the circuit breaker takes double tasks of control and protection. The actual circuit breaker is complex in control circuit, and actions are usually completed by an operating mechanism (such as spring energy storage type, hydraulic type, electromagnetic type and other operating mechanisms), so that the actual circuit breaker is high in price and large in size, scientific research institutions generally adopt simulated circuit breakers to simulate the functions of the circuit breaker, the actual circuit breaker can be used for the whole set of tests of the complete set of relay protection devices, the actual circuit breaker can truly simulate tripping and closing of the circuit breaker, repeated switching-on and switching-off of the circuit breaker due to repeated whole set tests can be avoided, and influence on the performance of the circuit breaker is reduced. However, if the existing circuit breaker control circuit is adopted in the analog circuit breaker, the circuit is complex, and more relays are adopted.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the simulation circuit breaker which has the advantages of simpler design, fewer used components and parts and more practicability by improving the control circuit under the condition of meeting the basic conditions required by the control circuit of the circuit breaker. The specific technical scheme is as follows:
the invention provides a simulation circuit breaker, which comprises a control power supply, and a switching-on control loop, a switching-off control loop, an anti-tripping loop, a switching-on indication loop, a switching-off indication loop and a contactor control loop which are connected with the control power supply;
the switching-on control loop, the switching-off control loop, the switching-on indication loop, the switching-off indication loop and the contactor control loop are sequentially connected in parallel;
the anti-tripping loop is bridged between the closing control loop and the opening control loop.
Further, the closing control circuit comprises a closing relay dynamic contact YC1, a manual closing button SB1, a protective closing dynamic contact K1, a separating relay dynamic disconnection point YR1 and a closing relay YC; the YC1, the SB1 and the K1 are sequentially connected in parallel, and a circuit after parallel connection is sequentially connected with the YR1 and the coil of the YC in series.
Further, the opening control loop comprises a manual opening button SB2, a protective opening closing contact KCO and an opening relay YR; the SB2 is connected with the KCO in parallel, and a loop after the parallel connection is connected with the coil of the YR in series.
Further, the anti-tripping circuit is bridged between the closing control circuit and the opening control circuit through an opening relay closing contact YR2, and the anti-tripping circuit is arranged behind a circuit formed by sequentially connecting YC1, SB1 and K1 in parallel and in front of a coil of the YR.
Further, the closing indication loop is formed by sequentially connecting a closing relay closing contact YC2, a closing indicator light HR and a current limiting resistor R1 in series.
Furthermore, the opening indicating loop is formed by sequentially connecting a switching relay breaking contact YC3, an opening indicating lamp HG and a current limiting resistor R2 in series.
Further, the contactor control circuit is formed by connecting a closing relay closing contact YC4 with a coil of a contactor QF in series, and a contact of the QF is connected with an external control circuit.
Further, when closing, SB1 or K1 is pressed, the current OF the control power supply passes SB1 or K1, YR1 in a closed state starts a coil OF YC, YC1, YC2 and YC4 are closed after the coil OF YC is operated, YC3 is opened, HR in a closing indication circuit is turned on, HG in an opening indication circuit is turned off, the coil circuit OF QF is started, a contact OF OF is closed, and an external control circuit is switched on.
Further, when switching off, SB2 is pressed or KCO is closed, the current OF the control power supply passes SB2 or KCO, the coil OF YR is started, after the coil OF YR acts, YR1 is opened, the coil loop OF YC is opened and power is lost, YC3 is closed, YC1, YC2 and YC4 are opened, the HR lamp in the switching-on indicating loop is turned off, HG in the switching-off indicating loop is turned on, the coil loop OF QF is opened, the contact OF OF is switched off, and the external control circuit is disconnected.
Further, an anti-bounce loop; when the circuit breaker is switched on to a permanent line fault, if the switching-on time of the SB1 contact is too long or the K1 cannot be disconnected, when the protection outlet dynamic switching contact KCO closes the coil of the starting YR, on one hand, the dynamic switching-off contact YR1 disconnects the switching-on control loop, so that the switching-on control loop cannot be switched on again; on the other hand, the dynamic contact YR2 is closed, so that the coil of YR can be powered from SB1 or K1 to keep the open-circuit state, and the anti-tripping is realized.
According to the technical scheme provided by the invention, the control circuit is improved under the condition of meeting the basic conditions required by the circuit breaker control loop, and the simulation circuit breaker is simpler in design, less in used components and more practical.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic circuit structure diagram of a circuit breaker according to an embodiment of the present invention.
[ reference numerals ]
YC 1-closing relay moving contact, SB 1-manual closing button, K1 protection closing moving contact, YR1 opening relay moving contact, YC closing relay, SB 2-manual opening button, KCO-protection opening moving contact, YR-opening relay, YR 2-opening relay moving contact, YC 2-closing relay moving contact, HR-closing indicator lamp, R1-current limiting resistor, YC 3-closing relay moving contact, HG-opening indicator lamp, R2-current limiting resistor, YC 4-closing relay moving contact, QF-contactor.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding the technical solutions of the present invention, the following description will be further explained by taking several specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The embodiment provides a simple and easy simulation circuit breaker for testing, which comprises a control power supply, a closing control loop, an opening control loop, an anti-tripping loop, a closing indication loop, an opening indication loop and a contactor control loop, wherein the closing control loop, the opening control loop, the anti-tripping loop, the closing indication loop, the opening indication loop and the contactor control loop are connected with the control power supply;
the switching-on control loop, the switching-off control loop, the switching-on indication loop, the switching-off indication loop and the contactor control loop are sequentially connected in parallel;
the anti-tripping loop is bridged between the closing control loop and the opening control loop.
The specific circuit structure of the analog circuit breaker described in this embodiment is shown in fig. 1:
in this embodiment, the structure of the closing control circuit is: the closing relay dynamic contact YC1, the manual closing button SB1 and the protective closing dynamic contact K1 are connected in parallel and then are sequentially connected in series with the coils of the opening relay dynamic disconnection point YR1 and the closing relay YC.
In this embodiment, the structure of the opening control loop is: the manual opening button SB2 is connected in parallel with the protective opening closing contact KCO, and then connected in series with the coil of the opening relay YR after being connected in parallel.
In this embodiment, the structure of the anti-trip circuit is: the opening relay closing contact YR2 is bridged behind the parallel connection point of the closing relay closing contact YC1, the manual closing button SB1 and the protective closing contact K1 in the closing control circuit and in front of the coil of the opening relay YR in the opening control circuit.
In this embodiment, the structure of the closing indication circuit is: the device is formed by sequentially connecting a closing relay contact YC2, a closing indicator light HR and a current limiting resistor R1 in series.
In this embodiment, the structure of the opening indicating loop is: the on-off switch is composed of a switching-on relay break contact YC3, a switching-off indicator lamp HG and a current-limiting resistor R2 which are connected in series in sequence.
In this embodiment, the structure of the contactor control circuit is: the switching-on relay is formed by connecting a switching-on contact YC4 and a coil of a contactor QF in series; the contact of the QF is used for connecting an external control circuit.
The analog circuit breaker described in this embodiment, when in use, is connected to an ac or dc 220V power supply.
This embodiment still provides the return circuit of simulation circuit breaker under the switching on/off state specifically is:
when in closing, a manual closing button SB1 is pressed or an external relay protection closing contact K1 is closed, a control power supply passes through a closed contact SB1 or a protection closing contact K1 and a breaking relay dynamic disconnection point YR1 in a closed state, a coil of a closing relay YC is started, after the coil of the YC acts, three corresponding pairs of dynamic closing contacts YC1, YC2 and YC4 are closed, and a dynamic disconnection contact YC3 is disconnected; the closing control circuit and the closing contact YC1 are closed to play a self-holding role; for a closing indicating loop, a dynamic contact YC2 starts a closing indicating lamp HR to light; for the switching-off indicating loop, the break contact YC3 breaks off the switching-off indicating lamp HG and goes out; for a contactor control circuit, a dynamic contact YC4 is communicated with a coil of a contactor QF, a contact of the QF is closed, and an external control circuit is communicated.
When the brake is opened, a manual brake-opening button SB2 is pressed or an external relay protection device is closed, a brake-opening and closing contact KCO is closed, a control power supply passes through the closed contact SB2 or the contact KCO to start a coil of a brake-opening relay YR, after the coil of the YR acts, the movable contact YR2 is closed, and a movable contact YR1 is opened; for the closing control circuit, the dynamic breaking contact YR1 breaks the closing circuit, the coil of the closing relay YC returns, the corresponding three pairs of dynamic breaking contacts YC1, YC2 and YC4 are broken, and the dynamic breaking contact YC3 is closed; for a closing indicating loop, a dynamic contact YC2 disconnects a closing indicating lamp HR and then goes out; for the switching-off indicating loop, the break contact YC3 is closed to start the switching-off indicating lamp HG to be lighted; for the contactor control circuit, the dynamic contact YC4 opens the coil circuit of the contactor QF, the contact of the QF returns, and the external control circuit is opened.
For the design of the anti-tripping loop, in this embodiment, when the circuit breaker is switched on (manually switched on or automatically switched on) to have a permanent fault on the line, if the contact on time of the manual switching-on button SB1 is long, or the relay protection device contact K1 is stuck or stuck and can not be disconnected, when the protection tripping starts the opening relay YR, on one hand, the dynamic breaking contact YR1 disconnects the switching-on loop, so that the switching-on loop can not be switched on again; on the other hand, the dynamic closing contact YR2 is closed, so that the coil of the opening relay YR can obtain power from the manual closing button SB1 or the adhered contact K1 of the relay protection device to keep the opening state, and the purpose of preventing jumping is achieved.
In conclusion, the invention adopts the opening relay moving and closing contact to be bridged between the closing control loop and the opening control loop, thereby completing the anti-tripping function and simplifying the circuit design; in the new circuit design principle of the proposed closing control circuit, a closing relay is adopted to realize self-holding by closing a contact, and a breaking relay is adopted to realize closing locking by breaking the contact; in the new circuit design principle of the provided opening control loop, a manual opening button or an external relay protection device is directly adopted to start opening.
The invention satisfies the basic functions of the circuit breaker control circuit, has simple control circuit design and fewer used components, and is more beneficial to the practical application of the simulation circuit breaker.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A simulation circuit breaker is characterized by comprising a control power supply, a closing control loop, an opening control loop, an anti-tripping loop, a closing indication loop, an opening indication loop and a contactor control loop, wherein the closing control loop, the opening control loop, the anti-tripping loop, the closing indication loop, the opening indication loop and the contactor control loop are connected with the control power supply;
the switching-on control loop, the switching-off control loop, the switching-on indication loop, the switching-off indication loop and the contactor control loop are sequentially connected in parallel;
the anti-tripping loop is bridged between the closing control loop and the opening control loop; wherein,
the switching-on control loop comprises a switching-on relay dynamic switching-on contact YC1, a manual switching-on button SB1, a protective switching-on dynamic switching-on contact K1, a switching-off relay dynamic breaking contact YR1 and a switching-on relay YC; the YC1, the SB1 and the K1 are sequentially connected in parallel, and a circuit after parallel connection is sequentially connected with the YR1 and a coil of the YC in series;
the opening control loop comprises a manual opening button SB2, a protective opening and closing contact KCO and an opening relay YR; the SB2 is connected with the KCO in parallel, and a loop after the parallel connection is connected with a coil of the YR in series;
the anti-tripping loop is bridged between the closing control loop and the opening control loop through an opening relay closing contact YR2, and the anti-tripping loop is arranged behind a loop formed by sequentially connecting YC1, SB1 and K1 in parallel and in front of a coil of the YR.
2. The analog circuit breaker of claim 1,
the switching-on indicating loop is formed by sequentially connecting a switching-on relay switch contact YC2, a switching-on indicating lamp HR and a current limiting resistor R1 in series.
3. The analog circuit breaker of claim 2,
the switching-off indicating circuit is formed by sequentially connecting a switching-on relay break contact YC3, a switching-off indicating lamp HG and a current-limiting resistor R2 in series.
4. The analog circuit breaker of claim 3,
the contactor control loop is formed by connecting a closing relay switch contact YC4 with a coil of a contactor QF in series, and a contact of the QF is connected with an external control circuit.
5. The analog circuit breaker of claim 4,
when closing, SB1 or K1 is pressed, the current of a control power supply passes through SB1 or K1 and YR1 in a closed state, a coil of YC is started, YC1, YC2 and YC4 are closed after the coil of YC is operated, YC3 is opened, HR in a closing indication circuit is turned on, HG lamp in a separating indication circuit is turned off, a coil circuit of QF is started, a contact of QF is closed, and an external control circuit is switched on.
6. The analog circuit breaker of claim 5,
when switching off, SB2 is pressed or KCO is closed, the current of a control power supply passes through SB2 or KCO, a coil of YR is started, after the coil of YR acts, YR1 is disconnected, a coil loop of YC is disconnected and power is lost, YC3 is closed, YC1, YC2 and YC4 are disconnected, an HR lamp in a switching-on indicating loop is turned off, HG in a switching-off indicating loop is turned on, a coil loop of QF is disconnected, a contact of QF is switched off, and an external control circuit is disconnected.
7. The analog circuit breaker of claim 6,
an anti-bounce circuit; when the circuit breaker is switched on to a permanent line fault, if the switching-on time of the SB1 contact is too long or the K1 cannot be disconnected, when the protection outlet dynamic switching contact KCO closes the coil of the starting YR, on one hand, the dynamic switching-off contact YR1 disconnects the switching-on control loop, so that the switching-on control loop cannot be switched on again; on the other hand, the dynamic contact YR2 is closed, so that the coil of YR can be powered from SB1 or K1 to keep the open-circuit state, and the anti-tripping is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810435204.6A CN108872840B (en) | 2018-05-09 | 2018-05-09 | A simulated circuit breaker |
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| CN201810435204.6A CN108872840B (en) | 2018-05-09 | 2018-05-09 | A simulated circuit breaker |
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| CN108872840A CN108872840A (en) | 2018-11-23 |
| CN108872840B true CN108872840B (en) | 2019-11-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739947A (en) * | 2019-11-15 | 2020-01-31 | 广东电网有限责任公司 | A switch simulator for FTU debugging |
| CN111965461B (en) * | 2020-08-24 | 2023-05-05 | 华能山东发电有限公司烟台发电厂 | Multifunctional analog circuit breaker |
| CN112415373A (en) * | 2020-11-10 | 2021-02-26 | 国网新疆电力有限公司喀什供电公司 | Analog circuit breaker for substation spare power automatic switching test |
| CN115707983A (en) * | 2021-08-19 | 2023-02-21 | 上海紫通信息科技有限公司 | Extremely simple and easy simulation circuit breaker circuit |
| CN113866616A (en) * | 2021-09-07 | 2021-12-31 | 山东钢铁集团日照有限公司 | A device and method for off-line testing of LF refining 35kV high-voltage circuit breakers |
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