CN209858657U - Self-adaptive fault discrimination device for power distribution network - Google Patents
Self-adaptive fault discrimination device for power distribution network Download PDFInfo
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- CN209858657U CN209858657U CN201920178158.6U CN201920178158U CN209858657U CN 209858657 U CN209858657 U CN 209858657U CN 201920178158 U CN201920178158 U CN 201920178158U CN 209858657 U CN209858657 U CN 209858657U
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Abstract
The utility model provides a self-adaptation trouble discrimination device for distribution network adopts plug-in components and the bus connection structure that plug-in components pull out and insert, include: the computer case comprises a case, and a bus plug-in, a power plug-in, a CPU plug-in, an input-output plug-in and an alternating current plug-in which are arranged in the case, wherein the power plug-in, the CPU plug-in, the input-output plug-in and the alternating current plug-in are all plugged in the bus plug-in, and are connected with each other through the bus plug-in to transmit information. The utility model discloses under the condition that distribution network broke down, can not rely on predetermined definite value threshold to come the accuracy to judge out the fault state, promote the accuracy that distribution network trouble was judged and distribution network's power supply reliability, the practicality is higher.
Description
Technical Field
The utility model relates to an electric power system distribution network protection and automation technology field especially relate to a self-adaptation trouble discrimination device for distribution network.
Background
Until now, overcurrent is mainly used as a fault identification criterion for a power distribution network, and a power distribution network management department needs to give a threshold value of overcurrent in advance before equipment is put into operation. Along with the annual increase of the scale of a power distribution network, the network topology is increasingly complex, and due to the characteristics of overhead and cable line mixing and uneven load distribution, fault current presents different numerical characteristics along with the change of the length of the line and the size of the load, so that the over-current fixed value is difficult to set, and the traditional method for giving the over-current threshold fixed value in advance and finishing protection logic judgment by adopting a pure over-current steady-state quantity criterion cannot meet the requirements of the current complex system. If the protection logic judgment is still completed by continuously using a fixed value setting method and adopting a pure overcurrent steady-state quantity criterion, the unreasonable setting may cause misjudgment, further affect the action strategy of the next step, finally affect fault isolation and power supply recovery, possibly cause large-area power failure in a sound area and unsafe closed loop operation of a system, and seriously affect the reliability of a distribution automation system and the power supply quality of the nation. Therefore, there is a need to provide a device capable of adaptively discriminating various faults of a distribution network without depending on a fixed threshold, so as to improve the power supply reliability of the distribution network.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a self-adaptation trouble decision device for distribution network is provided to guarantee under the condition that distribution network breaks down, can not rely on predetermined definite value threshold to come the accuracy to judge out the fault state, promote the accuracy that distribution network trouble was judged.
In order to solve the technical problem, the utility model provides a bus connection structure that is used for distribution network's self-adaptation trouble to differentiate device adopts plug-in components and plug-in components to pull out to insert, include: the computer case comprises a case, and a bus plug-in, a power plug-in, a CPU plug-in, an input-output plug-in and an alternating current plug-in which are arranged in the case, wherein the power plug-in, the CPU plug-in, the input-output plug-in and the alternating current plug-in are all plugged in the bus plug-in, and are connected with each other through the bus plug-in to transmit information.
The power supply plug-in is connected with an external 110V/220V direct current power supply through a power supply terminal, and after the conversion is carried out through the DC/DC switching power supply module, the bus plug-in provides a 5V direct current working power supply for the bus plug-in, the CPU plug-in, the input and output plug-in and the alternating current plug-in.
The CPU plug-in is used for receiving the position information and the functional pressing plate information of the power distribution switch and the analog quantity information transmitted by the alternating current plug-in, and sending a tripping action command when the power distribution switch is in fault, and then sending an electric signal of the tripping action to the electric mechanism executing the action after being transmitted to the power distribution switch through the bus plug-in.
The position information of the power distribution switch refers to the state that the power distribution switch is in a brake opening state or a brake closing state, the functional pressure plate information refers to the state that a protection switching-on/off functional hard pressure plate is in a switching-on state or a switching-off state, and the device maintenance hard pressure plate is in a maintenance state or a non-maintenance state, and the analog quantity information refers to A, B, C three-phase voltage and current information of the power distribution switch where the self-adaptive fault judgment device is located.
The protection switching-in and switching-out function hard pressing plate and the device maintenance hard pressing plate are both arranged outside the case, and the protection switching-in and switching-out function hard pressing plate is connected with the acquisition terminal of the plug-in and switching-out plug-in through a cable and used for switching in or switching out the self-adaptive fault judgment function; the device maintenance hard pressing plate is connected with the acquisition terminal of the plug-in and plug-out through a cable and used for acquiring whether the power distribution switch where the self-adaptive fault judgment device is located is in a maintenance state or not.
When the protection switching-in/off function hard pressing plate is closed, a positive power supply of the power supply plug-in unit reaches a protection switching-in/off optical coupler through the protection switching-in/off function hard pressing plate to enable the protection switching-in/off optical coupler to be conducted, and the self-adaptive fault judgment device judges that the protection switching-in/off state is a high level and that the protection switching-in/off function hard pressing plate is switched on; when the protection switching-in/off function hard pressing plate is switched in, the self-adaptive fault judgment function is in a switching-in state, otherwise, the self-adaptive fault judgment function is in a switching-out state.
When the device maintenance hard pressing plate is closed, a positive power supply of the power supply plug-in reaches the device maintenance open optical coupler through the device maintenance hard pressing plate, so that the device maintenance open optical coupler is conducted, and the self-adaptive fault judgment device judges that the device maintenance hard pressing plate is put into operation when the maintenance open state is high level; when the device maintenance hard pressing plate is put into service, the distribution switch is in a maintenance state, otherwise, the distribution switch is in a non-maintenance state.
The switching-in and switching-out plug-in is used for receiving a tripping action command sent by the bus plug-in, applying a protection switching-out signal to the power distribution switch through an external wiring, simultaneously collecting position information and function pressing plate information of the power distribution switch where the self-adaptive fault judging device is located by utilizing a collecting terminal of the switching-in and switching-out plug-in, and transmitting the position information and the function pressing plate information to the CPU plug-in through the bus plug-in.
The alternating current plug-in is used for collecting A, B, C three-phase voltage and current information of the power distribution switch where the self-adaptive fault judging device is located by using an alternating current terminal and transmitting the information to the CPU plug-in through the bus plug-in.
Wherein, the machine case is a standard 4U machine case, and the width is multiplied by the height and multiplied by the depth: 482.1mm by 177mm by 279.5 mm.
The embodiment of the utility model provides a beneficial effect lies in: under the condition that the distribution network breaks down, the fault state can be accurately judged without depending on a preset fixed value threshold, the accuracy of fault judgment of the distribution network and the power supply reliability of the distribution network are improved, and the practicability is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of an adaptive fault determination apparatus for a power distribution network according to an embodiment of the present invention.
Fig. 2 is a schematic view of a functional pressure plate circuit in an embodiment of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a self-adaptive fault determination device for a power distribution network, which employs a plug-in and a plug-in unplugging/plugging bus connection structure, including: the computer case comprises a case 6, and a bus plug-in 1, a power plug-in 2, a CPU plug-in 3, an access plug-in 4 and an alternating current plug-in 5 which are arranged in the case 6, wherein the power plug-in 2, the CPU plug-in 3, the access plug-in 4 and the alternating current plug-in 5 are all plugged in the bus plug-in 1 and are mutually connected through the bus plug-in 1 to transmit information.
Specifically, the power plug-in 2 is connected with an external 110V/220V direct current power supply through a power terminal, and after conversion is carried out through the DC/DC switching power supply module, a 5V direct current working power supply is provided for the bus plug-in 1, the CPU plug-in 3, the input and output plug-in 4 and the alternating current plug-in 5 through the bus plug-in 1.
The CPU plug-in 3 receives the position information and the function pressing plate information of the power distribution switch and the analog quantity information transmitted by the alternating current plug-in 5, which are transmitted by the open-close plug-in 4, sends a tripping action command under the condition that the power distribution switch has a fault, then transmits the tripping action command to the open-close plug-in 4 through the bus plug-in 1, and sends an electric signal of the tripping action to an electric mechanism executing the action; meanwhile, the CPU plug-in 3 also completes the functions of display, communication and human-computer interface.
The switching-in and switching-out plug-in 4 receives a tripping action command sent by the bus plug-in 1, applies a protection switching-out signal to a power distribution switch (the power distribution switch is connected with the switching-in and switching-out plug-in 4 through a cable) through external wiring, and simultaneously acquires position information (the state that the distribution switch is in a switching-off state or a switching-on state) and functional pressing plate information of the power distribution switch where the self-adaptive fault judging device is located by utilizing an acquisition terminal of the self-adaptive fault judging device and transmits the position information and the functional pressing plate information to the CPU plug-. The position information of the power distribution switch designates whether the power switch is in an opening state or a closing state. The functional pressing plates comprise a protection switching-in and switching-out functional hard pressing plate and a device maintenance hard pressing plate which are arranged outside the case 6, wherein the protection switching-in and switching-out functional hard pressing plate is connected with the acquisition terminal of the switching-in and switching-out plug-in 4 through a cable and is used for switching in or switching out the self-adaptive fault judgment function; the device maintenance hard pressing plate is connected with the acquisition terminal of the plug-in and plug-out 4 through a cable and is used for acquiring whether the power distribution switch where the self-adaptive fault judgment device is located is in a maintenance state or not.
As shown in fig. 2 again, when the protection switching function hard platen is switched in, the adaptive fault determination function of the adaptive fault determination device of the present embodiment is switched in; when the device overhauls the hard clamp plate and puts into operation, the maintenance state of this embodiment self-adaptation trouble shooting device drops into. Specifically, when the protection on/off function hard pressure plate is closed, the positive power supply of the power supply plug-in unit 2 reaches the protection on/off optocoupler through the protection on/off function hard pressure plate, so that the protection on/off optocoupler is turned on, and the adaptive fault determination device of the embodiment acquires that the protection on/off state is a high level, and determines that the protection on/off function hard pressure plate is turned on; when the protection switching-in/off function hard pressing plate is switched in, the self-adaptive fault judgment function is in a switching-in state, otherwise, the self-adaptive fault judgment function is in a switching-out state. When the device maintenance hard pressing plate is closed, a positive power supply of the power supply plug-in component 2 reaches the device maintenance open optical coupler through the device maintenance hard pressing plate, so that the device maintenance open optical coupler is conducted, and the self-adaptive fault judgment device of the embodiment judges that the device maintenance hard pressing plate is put into operation when the maintenance open state is high level; when the hard pressing plate for device maintenance is put into operation, the distribution switch is in a maintenance state, otherwise, the distribution switch is in a non-maintenance state. The protection throw-back drive-in optocoupler and the device maintenance drive-in optocoupler are both arranged in the drive-in drive-out plug-in component 4.
The ac plug-in 5 acquires analog quantity information of a branch where a line is located, that is, information of a phase voltage, an a-phase current, a B-phase voltage, a B-phase current, a C-phase voltage, a C-phase current and the like of a power distribution switch where the adaptive fault determination device of the embodiment is located, by using an ac terminal, and transmits the information to the CPU plug-in 3 through the bus plug-in 1.
As an example of the specific implementation, the chassis 6 adopts a standard 4U (full-layer) chassis external dimension, which is width × height × depth: 482.1mm by 177mm by 279.5 mm. The bus plug-in 1 adopts SR1003-00 type bus plug-in of Changyuan deep relay protection automation company, the power plug-in 2 adopts SR1630 type power plug-in of Changyuan deep relay protection automation company, the CPU plug-in 3 adopts SR1203-00 type control plug-in of Changyuan deep relay protection automation company, the access opening plug-in 4 adopts SR1311-00 type access opening plug-in of Changyuan deep relay protection automation company, and the AC plug-in 5 adopts SR1120-AH type AC plug-in of Changyuan deep relay protection automation company.
The utility model discloses a self-adaptation trouble discriminating gear for distribution network gathers the position information of the distribution switch of outside, the alternating current volume information such as A, B, C three-phase voltage and electric current, the protection of outside setting is thrown and is moved back the hard clamp plate of function and the device of outside setting overhauls state information such as hard clamp plate to judge whether the distribution switch at place breaks down in view of the above, for example, when the protection is thrown and is moved back the hard clamp plate of function and the device overhauls when the hard clamp plate withdraws from, the utility model discloses a self-adaptation trouble discriminating gear for distribution network enters normal operating condition; when any one of A, B, C three-phase voltages is less than 20V and the corresponding A, B, C three-phase current break amount is greater than 120A, the power distribution switch where the device is located is judged to have a fault, and therefore the purpose that the power distribution network has a fault and the fault state of the power distribution switch where the device is located can be judged without depending on a preset value is achieved.
Can know through the above description, the beneficial effects of the utility model reside in that, under the condition that distribution network broke down, can not rely on predetermined definite value threshold to come the accurate fault state of judging, promote distribution network fault judgement's accuracy and distribution network's power supply reliability, the practicality is higher.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. An adaptive fault discrimination apparatus for a power distribution network, which employs a plug-in and plug-in bus connection structure, comprising: the computer case comprises a case, and a bus plug-in, a power plug-in, a CPU plug-in, an input-output plug-in and an alternating current plug-in which are arranged in the case, wherein the power plug-in, the CPU plug-in, the input-output plug-in and the alternating current plug-in are all plugged in the bus plug-in, and are connected with each other through the bus plug-in to transmit information.
2. The adaptive fault discrimination device according to claim 1, wherein the power supply plug-in is connected to an external 110V/220V DC power supply through a power supply terminal, and supplies a 5V DC operating power to the bus plug-in, the CPU plug-in, the input/output plug-in, and the ac plug-in through the bus plug-in after being converted by the DC/DC switching power supply module.
3. The adaptive fault discrimination device according to claim 1, wherein the CPU card is configured to receive the position information and the functional pressing plate information of the power distribution switch and the analog quantity information transmitted by the ac card, which are transmitted from the input/output card, and to issue a trip operation command when the power distribution switch fails, and then to transmit the trip operation command to the input/output card through the bus card, and to issue an electrical signal of the trip operation to an electric mechanism that performs the operation.
4. The adaptive fault determination device according to claim 3, wherein the position information of the distribution switch indicates whether the distribution switch is in an open state or a closed state, the functional pressure plate information indicates whether a protection switching-on/off functional hard pressure plate is in an on state or an off state, and whether a device maintenance hard pressure plate is in a maintenance state or a non-maintenance state, and the analog quantity information indicates A, B, C three-phase voltage and current information of the distribution switch where the adaptive fault determination device is located.
5. The adaptive fault discrimination device according to claim 4, wherein the protection switching function hard pressing plate and the device maintenance hard pressing plate are both arranged outside the chassis, and the protection switching function hard pressing plate is connected with the acquisition terminal of the plug-in and plug-out module through a cable and used for switching in or switching out the adaptive fault discrimination function; the device maintenance hard pressing plate is connected with the acquisition terminal of the plug-in and plug-out through a cable and used for acquiring whether the power distribution switch where the self-adaptive fault judgment device is located is in a maintenance state or not.
6. The adaptive fault discrimination device according to claim 5, wherein when the protection on/off function hard pressing plate is closed, a positive power supply of the power supply plug-in reaches a protection on/off optical coupler through the protection on/off function hard pressing plate, so that the protection on/off optical coupler is turned on, and the adaptive fault discrimination device determines that the protection on/off function hard pressing plate is turned on when the protection on/off state is a high level; when the protection switching-in/off function hard pressing plate is switched in, the self-adaptive fault judgment function is in a switching-in state, otherwise, the self-adaptive fault judgment function is in a switching-out state.
7. The adaptive fault discrimination device according to claim 5, wherein when the device service hard platen is closed, the positive power supply of the power supply plug-in reaches a device service open optocoupler through the device service hard platen, so that the device service open optocoupler is turned on, and the adaptive fault discrimination device determines that the device service hard platen is turned on when the service open state is high; when the device maintenance hard pressing plate is put into service, the distribution switch is in a maintenance state, otherwise, the distribution switch is in a non-maintenance state.
8. The adaptive fault discrimination device according to claim 3, wherein the open-in/open-out card is configured to receive a trip operation command from the bus card, apply a protection open-out signal to the power distribution switch through an external connection, acquire position information and function board information of the power distribution switch where the adaptive fault discrimination device is located by using an acquisition terminal provided in the open-in/open-out card, and transmit the position information and the function board information to the CPU card through the bus card.
9. The adaptive fault discrimination device of claim 3, wherein the ac plug-in is configured to collect A, B, C three-phase voltage and current information of a power distribution switch where the adaptive fault discrimination device is located by using an ac terminal, and transmit the information to the CPU plug-in through the bus plug-in.
10. The adaptive fault discrimination device of claim 1, wherein the chassis is a standard 4U chassis having a width x height x depth: 482.1mm by 177mm by 279.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920178158.6U CN209858657U (en) | 2019-01-18 | 2019-01-18 | Self-adaptive fault discrimination device for power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920178158.6U CN209858657U (en) | 2019-01-18 | 2019-01-18 | Self-adaptive fault discrimination device for power distribution network |
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| Publication Number | Publication Date |
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| CN209858657U true CN209858657U (en) | 2019-12-27 |
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| CN201920178158.6U Active CN209858657U (en) | 2019-01-18 | 2019-01-18 | Self-adaptive fault discrimination device for power distribution network |
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