CN213091733U - Direct-current power supply device for relay protection transmission test - Google Patents
Direct-current power supply device for relay protection transmission test Download PDFInfo
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- CN213091733U CN213091733U CN202020914643.8U CN202020914643U CN213091733U CN 213091733 U CN213091733 U CN 213091733U CN 202020914643 U CN202020914643 U CN 202020914643U CN 213091733 U CN213091733 U CN 213091733U
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Abstract
The utility model discloses a DC power supply device for relay protection transmission is experimental, it is used for providing two way 80% rated voltage DC power supply, DC power supply device includes: a main loop rectifying part for rectifying the AC power supply into a DC power supply with 80% of rated voltage; the main loop switching part is used for connecting the direct current power supply with 80 percent of rated voltage output by the main loop rectifying part to the first control loop or the second control loop; the control loop interlocking part is used for switching the control loop I or the control loop II through a direct current contactor, ensuring that only one direct current contactor performs excitation action, and enabling only one of the control loop I and the control loop II to have a direct current power supply with 80% rated voltage; and the control loop monitoring part is used for indicating the electrification condition of the control loop I or the control loop II through an indicator lamp, and the indicator lamp corresponding to the conducted loop is turned on only when one loop is electrified.
Description
Technical Field
The utility model relates to a relay protection technical field especially relates to a direct current power supply device for relay protection transmission is experimental.
Background
The transmission test of the relay protection device is mainly used for verifying the correctness of a transmission switch and the reliability of a tripping loop and a closing loop of a breaker; for various reasons, the dc bus supply voltage may drop, which is specified to be no less than 90% of the rated voltage, and it is specified to be less than 10% of the rated voltage considering the voltage drop between the dc bus and each circuit, and if both conditions occur simultaneously, the dc bus supply voltage may drop to 80% of the rated voltage. If the whole set of transmission tests of the relay protection, the automatic device and the circuit breaker can correctly act under 80% of rated voltage, the working condition that the voltage of the direct-current power supply is reduced in actual operation is possibly met.
When the relay protection device is used for carrying out a circuit breaker transmission test under a direct-current power supply with 80% rated voltage, the direct-current power supply with the circuit breaker tripping and closing loop running normally needs to be disconnected, and the correctness of the transmission circuit breaker and the reliability of the circuit breaker tripping and closing secondary loop during protection action are verified by adding the direct-current power supply with 80% rated voltage into the circuit breaker tripping and closing secondary loop by using a special direct-current voltage-stabilizing high-power supply device. Because the switching-on and the switching-off I in the secondary circuit of the circuit breaker are the same circuit and the switching-off II is the other circuit, different rated voltage direct current power supplies are respectively used in normal operation, and the transmission test needs to be respectively verified.
In the prior art, a direct-current power supply device adopted in a transmission test of a relay protection device has the following problems:
(1) the direct-current voltage-stabilizing high-power supply device has the advantages of large volume, heavy weight, large heat dissipation capacity, inconvenient use and difficult use in places with less space such as relay protection rooms, and can be moved by a plurality of people.
(2) The standard parameters of each factory direct current voltage-stabilizing high-power supply device leaving factory are different, the application occasions are different, and the parameters of voltage stabilization, current stabilization, ripple waves and the like of the direct current voltage-stabilizing high-power supply device output direct current power supply of some factories cannot meet the direct current parameter requirements of the direct current power supply when a circuit breaker jumps and closes a secondary circuit to normally run, so that the accuracy of the test is influenced.
(3) Because the closing and tripping I of the circuit breaker are the same loop, the tripping II is another loop, use different rated voltage direct current power supply respectively in normal operation, so need verify separately while doing the transmission test, namely another loop can't be electrified while one of them loop is electrified, and the high-power supply unit of direct current voltage stabilization only outputs one direct current power supply, the relay protection device needs to dismantle the line repeatedly and shut the high-power supply unit of direct current voltage stabilization when taking the circuit breaker transmission test under the direct current power supply of 80% rated voltage, so, the test efficiency is low, cost a large amount of manual work and time, and there is the wrong wiring when switching and tearing the line, get an electric shock, the risk that the additional power supply flees into other loops.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a direct current power supply device for relay protection transmission test aiming at the defects of the prior art, which can realize the direct current power supply outputting 80% rated voltage, and the voltage stabilization, the current stabilization and the ripple parameters of the direct current power supply are consistent with the direct current power supply when the secondary circuit of the breaker tripping and closing is in normal operation; meanwhile, the multi-channel DC power supply output can be provided; and the device is more simple and easy miniaturization, utilizes the equipment spare part of power plant and transformer substation can independently assemble, and it is more convenient to use.
In order to achieve the above object, the utility model provides a dc power supply device for relay protection transmission is experimental, it is used for providing two way 80% rated voltage's dc power supply, dc power supply device includes:
a main loop rectifying part for rectifying the AC power supply into a DC power supply with 80% of rated voltage;
the main loop switching part is used for connecting a direct current power supply which outputs 80% of rated voltage by the main loop rectifying part to the first control loop or the second control loop;
the control loop interlocking part is used for switching the control loop I or the control loop II through a direct current contactor, ensuring that only one direct current contactor performs excitation action, and enabling only one of the control loop I and the control loop II to have a direct current power supply with 80% rated voltage;
and the control loop monitoring part is used for indicating the electrification condition of the control loop I or the control loop II through an indicator lamp, and the indicator lamp corresponding to the conducted loop is turned on only when one loop is electrified.
Optionally, the ac power supply is 400V.
Optionally, the rated dc voltage of the dc power supply is 220V, and 80% of the rated voltage is 176V.
Compared with the prior art, the utility model provides a beneficial effect that technical scheme brought is: firstly, the device is easy to realize and convenient to use. And some direct current voltage-stabilizing high-power supply devices output direct current power supplies, and voltage stabilization, current stabilization and ripple coefficients of the direct current power supplies, which are normally used by the device, do not accord with the industrial standard after actual detection parameters. The rectifying module M used by the device is a rectifying module used by a direct current system when the equipment normally operates, and the coefficients of voltage stabilization, current stabilization, ripple waves and the like meet the requirements of the industry standard after regular detection. Therefore, the rectifying module M used by the device can ensure that parameters such as voltage stabilization, current stabilization and ripple waves of the direct-current power supply with 80% rated voltage output after rectification are consistent with the direct-current power supply when the secondary circuit of the circuit breaker is in normal operation, and the accuracy of the test is improved; and secondly, the device switching principle and the structure are simple and easy to control, the repeated disconnection and connection of the power supply of the device are not needed during the test, the test efficiency is improved, and the risks of wrong connection, electric shock and the phenomenon that the power supply jumps into other loops are reduced. Meanwhile, all the elements of the device are spare parts, and the device does not need to purchase a direct-current voltage-stabilizing high-power supply device due to a transmission test of a direct-current power supply with a breaker of 80% rated voltage, so that the production cost is saved.
Drawings
Fig. 1 is a circuit diagram of a power supply device for a relay protection transmission test according to an embodiment of the present invention;
fig. 2 is an operation circuit diagram of a first control circuit of the power supply apparatus for the relay protection transmission test shown in fig. 1;
fig. 3 is an operation circuit diagram of a second control circuit of the power supply apparatus for the relay protection gear test shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.
The power supply device for the relay protection transmission test provided by the embodiment comprises a main loop and a control loop. In this embodiment, a transmission test with a breaker under a dc power supply with 80% rated voltage of a relay protection device is described.
As shown in fig. 1, the device is in an original, unpowered state. At the moment, the main loop has no power supply, the alternating current air switch F1 is switched off, and the rectifying module M does not rectify and has no direct current output; the direct current air switch F2 is disconnected, and the main contacts of the two direct current contactors KM1 and KM2 are both disconnected. At the moment, the control loop has no power supply, the coils of the two direct current contactors KM1 and KM2 do not perform excitation action, and the two indicator lamps H1 and H2 are both extinguished.
When the circuit breaker is in the state shown in the figure 1, the direct current power supplies of the first control circuit and the second control circuit of the original circuit breaker are disconnected, the original power supply connection is removed, after the universal meter is used for checking and confirming that no voltage exists, the 1L loop and the 2L loop of the testing device are respectively connected to the first control circuit and the second control circuit of the circuit breaker, and the resistance values of the first control circuit and the second control circuit of the circuit breaker are checked to be free of short circuit.
As shown in fig. 2, the device is switched to an operating state of the control loop after being powered on. Firstly, an alternating current air switch F1 of a rectifying part in a main loop of the device is closed, an output direct current voltage value of a rectifying module M is set to be 80% of rated voltage 176V (the rated voltage is 220V), a 400V alternating current power supply is rectified into direct current voltage 176V through the rectifying module M, a direct current air switch F2 of a switching part in the main loop of the device is closed, at the moment, a control loop of the device is not conducted, main contacts of direct current contactors KM1 and KM2 of the switching part in the main loop of the device are not closed, and a control loop I and a control loop II have no voltage. When the device is switched to a control loop operation state, a switching handle SA of an interlocking part in a control loop of the device needs to be switched to a control loop I side, at the moment, as shown in fig. 2, a coil of a direct current contactor KM1 is electrified and excited, a KM1 self-maintaining normally open contact of the interlocking part is closed, the switching handle SA automatically resets to a zero position, a KM1 coil keeps excited, a KM1 dynamic main contact of the switching part is closed, a direct current power supply with 176V voltage is input to the control loop of the circuit breaker in the main loop of the device, an interlocking normally closed contact of the KM1 of the interlocking part is opened, the KM2 coil is interlocked, a normally open contact of a KM1 of a monitoring part is closed, a normally closed contact is opened, a monitoring indicator lamp H1 of the control loop I is turned on and lightened, and the device is.
As shown in figure 2, when the device is switched to a control loop operating state after being electrified, the control loop is electrified to meet the conditions of a circuit I of a transmission breaker for switching on and tripping, and the relay protection device is combined to verify the correctness of the transmission breaker for protection action when the circuit I of the breaker for switching on and tripping is 80% of rated voltage and the reliability of a secondary circuit of the circuit breaker for tripping and switching on. Because the closing loop and the tripping loop I in the circuit breaker closing and tripping loop I are integrated, the device can complete the circuit breaker closing and tripping loop I multiple on-off tests without switching and keeping the state of a figure 2 under the condition of a plurality of relay protection devices.
As shown in fig. 3, the device is switched to the second control loop operating state after being charged. When the stop button SB in the control loop of the device is pressed, the coil KM1 in the interlocking part loses power, the closed interlocking part KM1 is disconnected from the holding contact, the KM1 in the switching part actuates the main contact to be opened, the interlocking contact KM1 in the opened interlocking part is closed, the normally open contact KM1 in the monitoring part is opened, the normally closed contact is closed, and the monitoring indicator lamp H1 in the control loop loses power and extinguishes, thereby indicating that the breaker control loop of the main loop of the device loses power. When the device is switched to the second operation state of the control loop, the switching handle SA of the interlocking part in the control loop of the device needs to be switched to the second operation state of the control loop, at the moment, as shown in fig. 3, a coil of a direct current contactor KM2 is electrified and excited, a KM2 self-maintaining normally open contact of the interlocking part is closed, the switching handle SA automatically resets to a zero position, a KM2 coil keeps excited, a KM2 dynamic closing main contact of the switching part is closed, the main loop of the device starts to input a direct current power supply with 176V voltage to the second circuit breaker control loop, a normally closed interlocking contact of the KM2 of the interlocking part is opened, the KM1 coil is interlocked, a normally open contact of a KM2 of a monitoring part is closed, a normally closed contact is opened, a monitoring indicator lamp H2 of the second control loop is.
As shown in figure 3, when the device is switched to a second control loop operation state after being electrified, the two-way electrification of the control loop meets the condition of a second trip loop of the transmission breaker, and the correctness of the protection action transmission breaker and the reliability of a secondary trip and closing loop of the breaker are verified by combining a relay protection device when the second trip loop is 80% of rated voltage. Because the closing loop and the tripping II loop of the circuit breaker are not in the same loop, the on-off circuit breaker is required to be switched for many times in the control loop two-transmission test under the condition of a plurality of relay protection devices, at the moment, the connection wire and the power supply of the on-off device do not need to be dismantled again, the on-off test can be completed only by switching the control loop two-operation state into the control loop one-operation state, and then switching into the control loop two-operation state to be operated repeatedly, so that the on-off test for many times in the tripping II loop of.
The test device of the present embodiment is so designed for two reasons: the device is easy to realize and convenient to use, and can ensure that the coefficients of the direct-current voltage output after rectification, such as voltage stabilization, current stabilization, ripple waves and the like, meet the direct-current voltage requirement when the secondary circuit normally operates, and improve the accuracy of the test; and secondly, the device switching principle and the structure are simple and easy to control, the repeated disconnection and connection of the power supply of the device are not needed during the test, the test efficiency is improved, and the risks of wrong connection, electric shock and the phenomenon that the power supply jumps into other loops are reduced.
The device provided by the embodiment has the following technical effects: the device is easy to realize and convenient to use, and can ensure that the coefficients of the direct-current voltage output after rectification, such as voltage stabilization, current stabilization, ripple waves and the like, meet the direct-current voltage requirement when the secondary circuit normally operates, and improve the accuracy of the test; and secondly, the device switching principle and the structure are simple and easy to control, the repeated disconnection and connection of the power supply of the device are not needed during the test, the test efficiency is improved, and the risks of wrong connection, electric shock and the phenomenon that the power supply jumps into other loops are reduced. Meanwhile, all the elements of the device are spare parts, and the device does not need to purchase a direct-current voltage-stabilizing high-power supply device under 80% rated direct-current voltage and with a breaker transmission test, so that the production cost is saved.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A direct current power supply device for a relay protection transmission test is used for providing two paths of direct current power supplies with 80% rated voltage, and is characterized by comprising the following components:
a main loop rectifying part for rectifying the AC power supply into a DC power supply with 80% of rated voltage;
the main loop switching part is used for connecting a direct current power supply which outputs 80% of rated voltage by the main loop rectifying part to the first control loop or the second control loop;
the control loop interlocking part is used for switching the control loop I or the control loop II through a direct current contactor, ensuring that only one direct current contactor performs excitation action, and enabling only one of the control loop I and the control loop II to have a direct current power supply with 80% rated voltage;
and the control loop monitoring part is used for indicating the electrification condition of the control loop I or the control loop II through an indicator lamp, and the indicator lamp corresponding to the conducted loop is turned on only when one loop is electrified.
2. The DC power supply device for relay protection transmission test according to claim 1, wherein the AC power supply is 400V.
3. The direct-current power supply device for the relay protection transmission test according to claim 1, wherein a rated direct-current voltage of the direct-current power supply is 220V, and 80% of the rated voltage is 176V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020914643.8U CN213091733U (en) | 2020-05-27 | 2020-05-27 | Direct-current power supply device for relay protection transmission test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020914643.8U CN213091733U (en) | 2020-05-27 | 2020-05-27 | Direct-current power supply device for relay protection transmission test |
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| Publication Number | Publication Date |
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| CN213091733U true CN213091733U (en) | 2021-04-30 |
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| CN202020914643.8U Active CN213091733U (en) | 2020-05-27 | 2020-05-27 | Direct-current power supply device for relay protection transmission test |
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