CN112485666A - Join in marriage intelligent fortune of net direct current circuit breaker many parameters and maintain detection device - Google Patents
Join in marriage intelligent fortune of net direct current circuit breaker many parameters and maintain detection device Download PDFInfo
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- CN112485666A CN112485666A CN202011429174.1A CN202011429174A CN112485666A CN 112485666 A CN112485666 A CN 112485666A CN 202011429174 A CN202011429174 A CN 202011429174A CN 112485666 A CN112485666 A CN 112485666A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention provides a multi-parameter intelligent operation and maintenance detection device for a distribution network direct current breaker, which comprises a power supply module, and a quick switch detection module, a controller detection module, a current conversion unit detection module, a solid-state switch detection module and a signal processing module which are respectively and independently connected with the power supply module. The invention configures a corresponding rapid switch detection module, a controller detection module, a current conversion unit detection module and a solid-state switch detection module; the distribution network direct current circuit breaker can be subjected to power failure detection or off-line detection, operation and maintenance of the distribution network direct current circuit breaker are facilitated, and during detection, real-time detection and real-time feedback and processing are performed on various parameters of mechanical characteristics of a mechanical switch of the distribution network direct current circuit breaker, loop resistance, a control time sequence of a controller, a current conversion assembly and a power electronic valve set, so that practical and effective work guidance and auxiliary judgment functions are provided for operation and maintenance personnel.
Description
Technical Field
The invention relates to the field of power grid operation and maintenance devices, in particular to a multi-parameter intelligent operation and maintenance detection device for a distribution network direct-current circuit breaker.
Background
With the continuous adjustment and improvement of the energy strategic structure, the multi-terminal flexible direct current transmission gradually becomes an important technical means for solving new energy grid connection. The direct current circuit breaker is used as a protection element in a multi-terminal flexible direct current transmission system, and the working reliability and the stability of the direct current circuit breaker are extremely important. The operation and maintenance of the direct-current circuit breaker are used as supervision and management links of the working reliability and stability of the direct-current circuit breaker, and the importance and the great significance of the operation and maintenance of the direct-current circuit breaker are self-evident.
A hybrid and mechanical distribution network direct current circuit breaker is a mainstream product in the market at present and is generally formed by connecting three branches in parallel, namely a through-current branch, a transfer branch and an energy consumption branch. The current branch circuit is generally composed of a mechanical switch, the transfer branch circuit is composed of an electronic switch unit and a current conversion unit which are connected in series, the current conversion unit is used for transferring short-circuit current from the current branch circuit to the transfer branch circuit, and the electronic switch unit transfers the short-circuit current from the transfer branch circuit to the energy consumption branch circuit, so that the disconnection is completed.
At present, distribution network direct current circuit breakers comprise high-voltage direct current circuit breakers, and are applied in a starting stage and lack corresponding operation and maintenance experience. The key point of current attention of domestic and foreign scientific research institutions and manufacturing enterprises is also in the design and manufacturing stage, and the key points and bottlenecks of operation and maintenance work are few, so that the operation and maintenance department is urgently required to deeply research the operation and maintenance technology of the direct-current circuit breaker for the distribution network, develop key equipment and establish operation and maintenance standards to support, guide and standardize daily operation and maintenance work. In view of the implementation experience of the existing high-voltage flexible direct engineering in China and the like, such as Zhoushan and south Australia, the whole direct-current circuit breaker and the components thereof, including a quick mechanical switch, a main branch power electronic valve bank (if any), a control protection system, a water cooling system (if any) and the like, are all key objects for operation and maintenance. However, for the direct current breaker for the high-voltage flexible direct current engineering, due to the huge size and numerous components, normal operation and maintenance work is very difficult. At present, no unified direct current breaker on-site operation and maintenance standard for a distribution network is formed in the technical means, and mature and reliable operation and maintenance equipment is not provided.
Chinese patent CN111463761A discloses a dc fault protection and control method for a multi-terminal flexible dc system; the quick direct current switch is arranged at two ends of each direct current line in the multi-end flexible direct current system; detecting the voltage to ground and the current of a direct current line of converter stations at two ends of the direct current line; and judging whether the direct current line has a unipolar grounding or bipolar short-circuit fault or not according to a preset voltage criterion and a current criterion. However, the direct current circuit breaker for the high-voltage flexible direct current engineering cannot be subjected to comprehensive operation and maintenance tests, and operation and maintenance work is very difficult; and requires a flexible system fit.
Disclosure of Invention
The invention provides a distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device, aiming at solving the problems that the direct current breaker for high-voltage flexible direct current engineering can not be subjected to all-around operation and maintenance test and the operation and maintenance work is very difficult in the background technology. The invention can detect the power failure of the distribution network direct current breaker and detect the power failure off line; and carrying out comprehensive operation and maintenance test on the direct current breaker for the high-voltage flexible direct engineering.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a join in marriage intelligent fortune of net direct current circuit breaker multi-parameter dimension detection device, including power module and respectively with power module independent connection:
the quick switch detection module is used for detecting mechanical characteristics and loop resistance of the mechanical switch;
the controller detection module is used for detecting the controller and the control time sequence of each drive board card;
the current conversion unit detection module is used for detecting the discharge current and the discharge voltage of the current conversion unit;
the solid-state switch detection module is used for detecting the driving voltage and the driving voltage of the power electronic valve bank;
and the signal processing module is independently connected with the quick switch detection module, the controller detection module, the commutation unit detection module and the solid-state switch detection module respectively, and is used for acquiring detection signals sent by the quick switch detection module, the controller detection module, the commutation unit detection module and the solid-state switch detection module, and respectively processing and displaying the acquired detection signals.
Furthermore, the signal processing module comprises an acquisition unit, a processing unit and a display unit which are connected in sequence, and the acquisition unit is independently connected with the quick switch detection module, the controller detection module, the current conversion unit detection module and the power electronic valve detection module respectively.
Furthermore, the fast switch detection module comprises a current source, and a displacement sensor, a first current sensor, a first voltage sensor and a detection resistor which are respectively and independently connected with the acquisition unit; the current source is connected with the detection resistor.
Further, the controller detection module comprises an optical fiber pulse transceiver module and a photoelectric conversion board card, the photoelectric conversion board card comprises a signal input port and a signal output port, the optical fiber pulse transceiver module is connected with the signal input port, and the signal output port is connected with the acquisition unit.
Further, the current conversion unit detection module comprises a second current sensor and a second voltage sensor which are respectively and independently connected with the acquisition unit.
Further, the solid state switch detection module includes a third current sensor and a third voltage sensor.
Further, the processing unit includes:
the human-computer interface is connected with the acquisition unit and used for selecting a corresponding topology type and a corresponding test module according to the test requirement of the distribution network direct-current short circuiter;
and the processing terminal is connected with the human-computer interface at one end and the display unit at the other end, and is used for configuring corresponding database parameters according to the topology type and the measurement object selected by the human-computer interface, and comparing the test result with a mark value prestored in the database to generate a processing result.
Further, the display unit is a mobile phone, a tablet computer or a computer.
Preferably, the power module is a rechargeable power supply.
Further, the power supply module is a 15V, 24V or 220V power supply.
Compared with the prior art, the beneficial effects are:
1. the invention configures a corresponding rapid switch detection module, a controller detection module, a current conversion unit detection module and a solid-state switch detection module; the distribution network direct current circuit breaker can be subjected to power failure detection or off-line detection, operation and maintenance of the distribution network direct current circuit breaker are facilitated, and during detection, real-time detection and real-time feedback and processing are performed on various parameters of mechanical characteristics of a mechanical switch of the distribution network direct current circuit breaker, loop resistance, a control time sequence of a controller, a current conversion assembly and a power electronic valve set, so that practical and effective work guidance and auxiliary judgment functions are provided for operation and maintenance personnel.
2. The invention also provides insulation establishing time and opening distance for mechanical characteristic test of the mechanical switch, the insulation establishing time and opening distance and contact conditions can be concerned, and the test is more comprehensive.
Drawings
Fig. 1 is a schematic view of the frame structure of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in fig. 1, the device for detecting the multi-parameter intelligent operation and maintenance of the distribution network dc circuit breaker includes a power module (not shown in the figure) and two units independently connected to the power module:
the quick switch detection module is used for detecting mechanical characteristics and loop resistance of the mechanical switch;
the controller detection module is used for detecting the controller and the control time sequence of each drive board card;
the current conversion unit detection module is used for detecting the discharge current and the discharge voltage of the current conversion unit;
the solid-state switch detection module is used for detecting the driving voltage and the driving voltage of the power electronic valve bank;
and the signal processing module is independently connected with the quick switch detection module, the controller detection module, the commutation unit detection module and the solid-state switch detection module respectively and is used for acquiring detection signals sent by the quick switch detection module, the controller detection module, the commutation unit detection module and the solid-state switch detection module and respectively processing and displaying the acquired detection signals.
The power supply module can be a 15V, 24V or 220V rechargeable power supply; the current can be direct current or alternating current, and the current can be selected and used according to actual needs.
In this embodiment, the signal processing module includes an acquisition unit, a processing unit and a display unit that are connected in sequence, and the acquisition unit is independently connected with the fast switch detection module, the controller detection module, the commutation unit detection module and the power electronic valve detection module respectively.
In the signal processing module, the acquisition unit is used for collecting the analog quantity and the digital quantity acquired by the main body function module, then carrying out filtering, sampling frequency processing and effective value processing, and then uploading the data to the processing unit; the processing unit may be considered as an upper computer, which comprises: the human-computer interface is connected with the acquisition unit and used for selecting a corresponding topology type and a corresponding test module according to the test requirement of the distribution network direct-current short circuiter; and the measurement results are shown in the form of data, tables and curves.
One end of the processing terminal is connected with the human-computer interface, and the other end of the processing terminal is connected with the display unit and is used for configuring corresponding database parameters according to the topology type and the measurement object selected by the human-computer interface, and comparing the test result with a pre-stored labeled value of the database to generate a processing result; then result evaluation and instructive suggestion are given, and a test report is given.
The display unit is typically a computer; or can be an intelligent terminal such as a mobile phone, a tablet computer and the like.
The rapid switch detection module comprises a current source, a displacement sensor, a first current sensor, a first voltage sensor and a detection resistor which are respectively and independently connected with the acquisition unit; the current source is connected with the detection resistor. The displacement sensor is used for measuring a motion displacement curve of the mechanical switch body, the current sensor is used for measuring driving current of a repulsion coil of a repulsion mechanism of the mechanical switch, and the voltage sensor is used for measuring energy storage capacitor voltage of the repulsion mechanism of the mechanical switch. The current source and the high-precision detection resistor adopt a high-power switching power supply technology and an electronic circuit and are used for detecting the loop resistance of the mechanical switch. The power supply module configures different voltages of the programmable power supply to the measuring units. After a displacement curve measured by the displacement sensor, a driving voltage measured by the voltage sensor and a driving current measured by the current sensor are collected and uploaded to the processing unit through the collecting unit, mechanical characteristics (including motion information such as rapid mechanical switch stroke, over travel, switching-on and switching-off speed, switching-on and switching-off time, switching-on and switching-off bounce, insulation establishing time, insulation establishing distance and the like) of the mechanical switch are analyzed by the processing unit and are displayed by the display unit, and operation and maintenance personnel can conveniently perform auxiliary judgment on the mechanical characteristic conditions of the mechanical switch. The loop resistance of the current source and the high-precision detection resistor combined detection is uploaded to the processing unit through the acquisition unit and then analyzed by the processing unit to obtain the through-flow information of the quick mechanical switch and displayed through the display unit, so that operation and maintenance personnel can perform auxiliary judgment on the contact condition and the ablation and abrasion conditions of the contact of the mechanical switch.
The controller detection module comprises an optical fiber pulse transceiving module and a photoelectric conversion board card, the photoelectric conversion board card comprises a signal input port and a signal output port, the optical fiber pulse transceiving module is connected with the signal input port, and the signal output port is connected with the acquisition unit. The optical fiber pulse transceiving module is used for issuing an action command to the direct current breaker controller and receiving an action trigger signal of the controller; the photoelectric conversion board card is used for converting the action triggering light signals received by the optical fiber pulse transceiving module into electric signals and transmitting the electric signals to the acquisition unit. And then the signals enter a signal processing module for processing.
The current conversion unit detection module comprises a second current sensor and a second voltage sensor which are respectively and independently connected with the acquisition unit. The second voltage sensor is used for measuring the voltage of the energy storage capacitor of the commutation unit, and the second current sensor is used for measuring the discharge current of the commutation unit. After the current conversion unit voltage signals and the current signals measured by the second voltage sensor and the second current sensor are uploaded to the processing unit through the acquisition unit, the processing unit analyzes the current conversion information of the current conversion unit, and the current conversion capability working condition of the current conversion unit is subjected to auxiliary judgment.
The solid state switch detection module includes a third current sensor and a third voltage sensor. The third voltage sensor is used for measuring the voltage of the solid-state switch driving power supply, and the third current sensor is used for measuring the current of the solid-state switch driving power supply. After the voltage signal and the current signal of the solid-state switch measured by the third voltage sensor and the third current sensor are uploaded to the processing unit through the signal acquisition unit, the driving information of the solid-state switch is analyzed by the processing unit, and the working condition of the solid-state switch is judged in an auxiliary manner.
In the embodiment, a corresponding fast switch detection module, a controller detection module, a commutation unit detection module and a solid-state switch detection module are configured; the distribution network direct current circuit breaker can be subjected to power failure detection or off-line detection, operation and maintenance of the distribution network direct current circuit breaker are facilitated, and during detection, real-time detection and real-time feedback and processing are performed on various parameters of mechanical characteristics of a mechanical switch of the distribution network direct current circuit breaker, loop resistance, a control time sequence of a controller, a current conversion assembly and a power electronic valve set, so that practical and effective work guidance and auxiliary judgment functions are provided for operation and maintenance personnel. In addition, the mechanical characteristic test insulation establishing time and the opening distance are provided in the embodiment, and the insulation establishing time, the opening distance and the contact conditions can be concerned; the test is more comprehensive.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a join in marriage intelligent fortune of net direct current circuit breaker many parameters dimension detection device which characterized in that, including power module and respectively with power module independent connection:
the quick switch detection module is used for detecting mechanical characteristics and loop resistance of the mechanical switch;
the controller detection module is used for detecting the controller and the control time sequence of each drive board card;
the current conversion unit detection module is used for detecting the discharge current and the discharge voltage of the current conversion unit;
the solid-state switch detection module is used for detecting the driving voltage and the driving voltage of the power electronic valve bank;
and the signal processing module is independently connected with the quick switch detection module, the controller detection module, the commutation unit detection module and the solid-state switch detection module respectively, and is used for acquiring detection signals sent by the quick switch detection module, the controller detection module, the commutation unit detection module and the solid-state switch detection module, and respectively processing and displaying the acquired detection signals.
2. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 1, wherein the signal processing module comprises an acquisition unit, a processing unit and a display unit which are connected in sequence, and the acquisition unit is independently connected with the fast switch detection module, the controller detection module, the current conversion unit detection module and the power electronic valve detection module respectively.
3. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device according to claim 2, wherein the fast switch detection module comprises a current source, and a displacement sensor, a first current sensor, a first voltage sensor and a detection resistor which are independently connected with the acquisition unit respectively; the current source is connected with the detection resistor.
4. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 2, wherein the controller detection module comprises an optical fiber pulse transceiver module and a photoelectric conversion board card, the photoelectric conversion board card comprises a signal input port and a signal output port, the optical fiber pulse transceiver module is connected with the signal input port, and the signal output port is connected with the acquisition unit.
5. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device according to claim 2, wherein the current conversion unit detection module comprises a second current sensor and a second voltage sensor which are independently connected with the acquisition unit respectively.
6. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 2, wherein the solid state switch detection module comprises a third current sensor and a third voltage sensor.
7. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 2, wherein the processing unit comprises:
the human-computer interface is connected with the acquisition unit and used for selecting a corresponding topology type and a corresponding test module according to the test requirement of the distribution network direct-current short circuiter;
and the processing terminal is connected with the human-computer interface at one end and the display unit at the other end, and is used for configuring corresponding database parameters according to the topology type and the measurement object selected by the human-computer interface, and comparing the test result with a mark value prestored in the database to generate a processing result.
8. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 2, wherein the display unit is a mobile phone, a tablet personal computer or a computer.
9. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 1, wherein the power module is a rechargeable power supply.
10. The distribution network direct current breaker multi-parameter intelligent operation and maintenance detection device of claim 1, wherein the power module is a 15V, 24V or 220V power supply.
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| CN202011429174.1A CN112485666A (en) | 2020-12-09 | 2020-12-09 | Join in marriage intelligent fortune of net direct current circuit breaker many parameters and maintain detection device |
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| CN202011429174.1A CN112485666A (en) | 2020-12-09 | 2020-12-09 | Join in marriage intelligent fortune of net direct current circuit breaker many parameters and maintain detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113625162A (en) * | 2021-08-20 | 2021-11-09 | 国网江苏省电力有限公司电力科学研究院 | DC distribution network switch characteristic test system and method |
| CN113740725A (en) * | 2021-09-09 | 2021-12-03 | 广东电网有限责任公司 | Method and device for monitoring state of driving unit of repulsion switch |
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| CN113625162A (en) * | 2021-08-20 | 2021-11-09 | 国网江苏省电力有限公司电力科学研究院 | DC distribution network switch characteristic test system and method |
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Application publication date: 20210312 |