CN215493913U - Joint test system based on low-current grounding line selection device and power distribution terminal - Google Patents
Joint test system based on low-current grounding line selection device and power distribution terminal Download PDFInfo
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- CN215493913U CN215493913U CN202120835692.7U CN202120835692U CN215493913U CN 215493913 U CN215493913 U CN 215493913U CN 202120835692 U CN202120835692 U CN 202120835692U CN 215493913 U CN215493913 U CN 215493913U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The application discloses joint test system based on undercurrent ground connection route selection device and distribution terminal for alleviate prior art and do not consider the cooperation relation of distribution terminal and undercurrent ground connection route selection device, thereby can't judge whether parameter complex's technical problem of undercurrent ground connection route selection device and distribution terminal through the test. The real-time simulator is connected with the low-current grounding line selection device and the power distribution terminal; the real-time simulator is used for sending an electric signal to the low-current grounding line selection device and receiving a tripping signal of the circuit breaker; the low-current grounding line selection device is used for receiving the electric signal, judging the fault and sending a first control instruction for controlling the circuit breaker to the real-time simulator; and the power distribution terminal is used for receiving the electric signals, carrying out charged state judgment and fault isolation judgment, and sending a second control instruction for controlling the circuit breaker to the real-time simulator.
Description
Technical Field
The application relates to the technical field of power system testing, in particular to a combined testing system based on a low-current grounding line selection device and a power distribution terminal.
Background
Most of power distribution networks in China are low-current grounding systems, fault line selection of the low-current grounding systems is an important subject of the power distribution networks, overvoltage generated by grounding faults easily causes insulation breakdown of non-fault phases, and long-time arc currents can burn fault point insulation to cause two-phase short circuit faults; and if the line falls to the ground, personal safety accidents can be caused, so that the line with the ground fault can be quickly positioned and cleared, and the method has great significance for the safe operation of the power distribution network.
After a large-scale distribution network in China is transformed, a large number of distribution terminals FTUs are arranged in the distribution network, and the distribution terminals have the functions of realizing fault positioning, fault isolation, quick power restoration in a non-fault area and the like. The parameters of the power distribution terminal are matched with the parameter setting of the low-current grounding line selection device, otherwise, the risk of switching on and off a fault line for multiple times is caused, and the power supply is influenced. The current system or method for testing the low-current grounding line selection device does not consider the matching relationship between the power distribution terminal and the low-current grounding line selection device, so that whether the low-current grounding line selection device is matched with the power distribution terminal in parameters or not can not be judged through conventional tests.
SUMMERY OF THE UTILITY MODEL
The application provides a joint test system based on undercurrent ground connection route selection device and distribution terminal for alleviate prior art and do not consider the cooperation relation of distribution terminal and undercurrent ground connection route selection device, thereby can't judge whether parameter complex's technical problem of undercurrent ground connection route selection device and distribution terminal through the test.
In view of this, the first aspect of the present application provides a combined test system based on a low-current grounding line selection device and a power distribution terminal, including: the system comprises a real-time simulator, a low-current grounding line selection device and a power distribution terminal;
the real-time simulator is connected with the low-current grounding line selection device and the power distribution terminal;
the real-time simulator is used for sending an electric signal to the low-current grounding line selection device and receiving a tripping signal of the circuit breaker;
the low-current grounding line selection device is used for receiving the electric signal, judging faults and sending a first control instruction for controlling the circuit breaker to the real-time simulator;
and the power distribution terminal is used for receiving the electric signals, carrying out charged state judgment and fault isolation judgment, and sending a second control instruction for controlling the circuit breaker to the real-time simulator.
Preferably, the method further comprises the following steps: a current amplifier;
the current amplifier is connected with the real-time simulator and used for amplifying the analog current small signal output by the real-time simulator.
Preferably, the method further comprises the following steps: a voltage amplifier;
and the voltage amplifier is connected with the real-time simulator and is used for amplifying the analog voltage small signal output by the real-time simulator.
Preferably, the method further comprises the following steps: a terminal-type relay;
and the terminal type relay is connected with the real-time simulator and is used for coupling the digital signal output by the real-time simulator.
Preferably, the method further comprises the following steps: an interface board card;
the interface board card is connected to the real-time simulator and used for sending and receiving signals, and the interface board card comprises an input interface board card and an output interface board card.
Preferably, the number of the power distribution terminals is at least two, and the power distribution terminals are connected with each other.
According to the technical scheme, the embodiment of the application has the following advantages:
in this application, a joint test system based on undercurrent ground connection route selection device and distribution terminal is provided, includes: the real-time simulator is connected with the low-current grounding line selection device and the power distribution terminal; the real-time simulator is used for sending an electric signal to the low-current grounding line selection device and receiving a tripping signal of the circuit breaker; the low-current grounding line selection device is used for receiving the electric signal, judging the fault and sending a first control instruction for controlling the circuit breaker to the real-time simulator; and the power distribution terminal is used for receiving the electric signals, carrying out charged state judgment and fault isolation judgment, and sending a second control instruction for controlling the circuit breaker to the real-time simulator.
The application provides a joint test system based on undercurrent ground connection route selection device and distribution terminal, undercurrent ground connection route selection device all links to each other with real-time simulator with distribution terminal, can constitute a joint test system, and in the test process, can detect whether undercurrent ground connection route selection device satisfies the requirement with distribution terminal parameter cooperation, avoids the two to mismatch and causes the problem that fault line divides and shuts many times, has ensured the safety and stability operation of distribution network. Therefore, the technical problem that whether the small-current grounding line selection device is matched with the power distribution terminal in parameter or not can not be judged through testing because the matching relation of the power distribution terminal and the small-current grounding line selection device is not considered in the prior art can be solved.
Drawings
Fig. 1 is a schematic line connection diagram of a combined test system based on a low-current grounding line selection device and a power distribution terminal provided in the present application;
fig. 2 is a schematic circuit diagram of a conventional low-current grounding line selection device provided in the present application;
reference numerals:
a real-time simulator 1; a low-current grounding line selection device 2; a power distribution terminal 3; a current amplifier 4; and a voltage amplifier 5.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 2, the conventional low-current grounding line selection device is installed at a bus, and controls the breakers QF1 and QF2 according to the line selection result, while 2 power distribution terminals respectively control the breakers QF3 and QF4 after logical operation according to the charged state of the line. For example, when K2 has a fault, the circuit breaker QF4 can be quickly separated through the matching of the low-current grounding line selection device and the power distribution terminal, so that fault isolation is realized, and if parameters are not properly matched, QF4 can be separated and combined for multiple times, so that the operation efficiency of the system is influenced.
For easy understanding, please refer to fig. 1, the present application provides a combined test system based on a low-current grounding line selection device and a power distribution terminal, including: the system comprises a real-time simulator 1, a low-current grounding line selection device 2 and a power distribution terminal 3.
The real-time simulator 1 is connected with the low-current grounding line selection device 2 and the power distribution terminal 3; the actual connection relationship is: the signal output end of the real-time simulator 1 is respectively connected with the input end of the low-current grounding line selection device 2 and the input end of the power distribution terminal 3, and the output end of the low-current grounding line selection device 2 and the output end of the power distribution terminal 3 are both connected with the input end of the real-time simulator 1.
The real-time simulator 1 is used for sending an electric signal to the low-current grounding line selection device 2 and receiving a tripping signal of the circuit breaker; the low-current grounding line selection device 2 is used for receiving the electric signal, judging a fault and sending a first control instruction for controlling the circuit breaker to the real-time simulator 1; the power distribution terminal 3 is used for receiving the electric signal, performing charged state judgment and fault isolation judgment, and sending a second control instruction for controlling the circuit breaker to the real-time simulator 1.
The real-time simulator 1 is used for simulating the working condition and the grounding fault of the power distribution network during operation, then sends the simulated electric signals to the low-current grounding line selection device 2 and the power distribution terminal 3, and simultaneously processes control instructions returned by the low-current grounding line selection device 2 and the power distribution terminal 3, so that the switching of the circuit breaker is controlled. The electric signals comprise current signals and voltage signals. In addition to this, the real-time simulator 1 can also generate digital signals.
The fault judgment mode of the low-current grounding line selection device 2 is to perform logical operation on the received analog signals or digital signals so as to judge information such as a fault line, a fault phase, a fault type and the like, and then generate a first control instruction according to the fault information.
The fault judgment mode of the power distribution terminal 3 is also logical operation, but the live state of the branch circuit and the judgment of whether fault isolation is carried out need to be judged through the logical operation, and a second control instruction is generated according to the judgment condition.
The utility model provides a joint test system based on undercurrent ground connection route selection device and distribution terminal, undercurrent ground connection route selection device all links to each other with real-time simulator with distribution terminal, can constitute a joint test system, in the test process, can detect whether parameter cooperation satisfies the requirement with distribution terminal of undercurrent ground connection route selection device, avoids the two to mismatch and causes the problem that fault line divides and shut many times, has ensured the safety and stability operation of distribution network. Therefore, the technical problem that whether the small-current grounding line selection device is matched with the power distribution terminal in parameter or not can not be judged through testing due to the fact that the matching relation of the power distribution terminal and the small-current grounding line selection device is not considered in the prior art can be solved.
As an improvement of the above embodiment, further, the method further includes: a current amplifier 4;
the current amplifier 1 is connected with the real-time simulator and used for amplifying the analog current small signal output by the real-time simulator. The current amplifier 4 is positioned between the real-time simulator 1 and the low-current grounding line selection device 2, and amplifies the analog current small signal output by the real-time simulator 1, so that the low-current grounding line selection device 2 or the power distribution terminal 3 can accurately receive the electric signal.
As an improvement of the above embodiment, further, the method further includes: a voltage amplifier 5;
the voltage amplifier 5 is connected with the real-time simulator 1 and is used for amplifying the analog voltage small signal output by the real-time simulator 1. Similarly, when the real-time simulator 1 outputs a small analog voltage signal, the small analog voltage signal needs to be amplified by the voltage amplifier, so that the small current grounding line selection device 2 or the power distribution terminal 3 can accurately receive the electric signal.
As an improvement of the above embodiment, further, the method further includes: a terminal-type relay;
the terminal type relay is connected with the real-time simulator 1 and is used for coupling the digital signals output by the real-time simulator 1. Besides the above devices, a terminal type relay can be added behind the real-time simulator 1, and the relay is mainly used for coupling and isolating the digital signals output by the real-time simulator 1.
As an improvement of the above embodiment, further, the method further includes: an interface board card;
the interface board card is connected to the real-time simulator and used for sending and receiving signals, and the interface board card comprises an input interface board card and an output interface board card. The interface board card is mainly set for the output and received signals of the real-time simulator, an output interface board card can be set for the output analog signals or digital signals, and an input interface board card can be set for the received signals; for completing the transmission of the signal.
As a modification of the above embodiment, further, there are at least two power distribution terminals, and the power distribution terminals are connected to each other. The power distribution terminals can be configured in a plurality according to actual conditions, and the power distribution terminals can be connected in a manner shown in fig. 1.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (6)
1. A joint test system based on low current ground connection route selection device and distribution terminal, its characterized in that includes: the system comprises a real-time simulator, a low-current grounding line selection device and a power distribution terminal;
the real-time simulator is connected with the low-current grounding line selection device and the power distribution terminal;
the real-time simulator is used for sending an electric signal to the low-current grounding line selection device and receiving a tripping signal of the circuit breaker;
the low-current grounding line selection device is used for receiving the electric signal, judging faults and sending a first control instruction for controlling the circuit breaker to the real-time simulator;
and the power distribution terminal is used for receiving the electric signals, carrying out charged state judgment and fault isolation judgment, and sending a second control instruction for controlling the circuit breaker to the real-time simulator.
2. The combined test system based on the low-current grounding line selection device and the power distribution terminal as claimed in claim 1, further comprising: a current amplifier;
the current amplifier is connected with the real-time simulator and used for amplifying the analog current small signal output by the real-time simulator.
3. The combined test system based on the low-current grounding line selection device and the power distribution terminal as claimed in claim 1, further comprising: a voltage amplifier;
and the voltage amplifier is connected with the real-time simulator and is used for amplifying the analog voltage small signal output by the real-time simulator.
4. The combined test system based on the low-current grounding line selection device and the power distribution terminal as claimed in claim 1, further comprising: a terminal-type relay;
and the terminal type relay is connected with the real-time simulator and is used for coupling the digital signal output by the real-time simulator.
5. The combined test system based on the low-current grounding line selection device and the power distribution terminal as claimed in claim 1, further comprising: an interface board card;
the interface board card is connected to the real-time simulator and used for sending and receiving signals, and the interface board card comprises an input interface board card and an output interface board card.
6. The combined test system based on the low-current grounding line selection device and the power distribution terminal as claimed in claim 1, wherein the number of the power distribution terminals is at least two, and the power distribution terminals are connected with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120835692.7U CN215493913U (en) | 2021-04-22 | 2021-04-22 | Joint test system based on low-current grounding line selection device and power distribution terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120835692.7U CN215493913U (en) | 2021-04-22 | 2021-04-22 | Joint test system based on low-current grounding line selection device and power distribution terminal |
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| Publication Number | Publication Date |
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| CN215493913U true CN215493913U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120835692.7U Active CN215493913U (en) | 2021-04-22 | 2021-04-22 | Joint test system based on low-current grounding line selection device and power distribution terminal |
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| CN (1) | CN215493913U (en) |
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- 2021-04-22 CN CN202120835692.7U patent/CN215493913U/en active Active
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