CN112486077A - Digital PT-free intelligent operation and maintenance switch, system and application method - Google Patents
Digital PT-free intelligent operation and maintenance switch, system and application method Download PDFInfo
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- CN112486077A CN112486077A CN202011424184.6A CN202011424184A CN112486077A CN 112486077 A CN112486077 A CN 112486077A CN 202011424184 A CN202011424184 A CN 202011424184A CN 112486077 A CN112486077 A CN 112486077A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention provides a digital PT-free intelligent operation and maintenance switch, a system and an application method, wherein the switch comprises a first control unit, a sensor unit, a switch state detection unit, an operating mechanism, a first communication unit and a high-voltage capacitance power taking unit connected with the first control unit, the sensor unit is connected with the first control unit and used for inputting acquired analog signals to the first control unit, the first control unit is connected with the switch state detection unit to form a switching value input/output unit to control the operating mechanism to be switched on and off so as to realize the output of switching values, and the first control unit is connected with the first communication unit and used for remotely monitoring and controlling the capacitance power taking switch. The invention can realize uninterrupted replacement by a module detection mode, thereby improving the maintenance efficiency, and adopts double CPUs to process high-speed and low-speed data in a time division manner, so that the line protection has real-time performance and reliability.
Description
Technical Field
The invention relates to the technical field of distribution automation, in particular to a high-speed protection digital PT-free intelligent operation and maintenance switch, a system and an application method applied to the system.
Background
At present, the capacitor power taking and distribution automatic pole-mounted switch has many advantages and is gradually popularized by more and more electric power companies of national power grids. The capacitor power-taking switch is mainly technically characterized in that: 1. replacing the traditional PT with capacitor power supply; 2. the switched secondary device (FTU) achieves low power consumption. Other features are not different from conventional distribution automation switches.
The main problems of the prior art are as follows: 1. maintenance inefficiency: when equipment needs to be maintained after being in fault, power failure must be firstly carried out, which not only causes trouble caused by power failure to users, but also causes economic loss to power companies; 2. the switch has no fault preventive measures, and the switch needs to wait for the switch to be overhauled passively after the fault happens.
The latest solution in the market is as follows: the signal of the current-voltage sensor is firstly converted into a digital signal, and the transmission of the digital signal is realized.
However, due to the resource limitation of the CPU and the volume limitation of the cable, the digital transmission can only adopt serial communication, which reduces the real-time performance of CPU data acquisition, thereby reducing the real-time performance of protection, and may cause tripping of an upstream switch and even an outlet switch of a substation, resulting in large-area power failure, which is not allowable for protection.
Disclosure of Invention
The invention aims to provide a digital PT-free intelligent operation and maintenance switch which can be replaced without power failure in an integrated module detection mode, so that the maintenance efficiency is improved.
The second objective of the present invention is to provide a digital PT-free intelligent operation and maintenance switching system that uses dual CPUs to process high-speed and low-speed data in a time-division manner, so as to avoid delay caused by serial communication of existing digital products, and to make circuit protection have real-time performance.
The third objective of the present invention is to provide an application method of the digital PT-free intelligent operation and maintenance switch system applied to the above system.
In order to achieve the first object, the invention provides a digital PT-free intelligent operation and maintenance switch, which includes a first control unit, a sensor unit, a switch state detection unit, an operating mechanism, a first communication unit, and a high-voltage capacitance power-taking unit connected to the first control unit, wherein the sensor unit is connected to the first control unit and is configured to input an acquired analog signal to the first control unit, the first control unit is connected to the switch state detection unit and forms a switching value input/output unit to control the operating mechanism to switch on and off, so as to output a switching value, and the first control unit is connected to the first communication unit and is configured to remotely monitor and control the capacitance power-taking switch.
In a further scheme, the capacitance power-taking switch further comprises a line loss measuring unit, and the line loss measuring unit is connected with the first control unit.
In a further scheme, the high-voltage capacitor electricity-taking unit comprises a high-voltage capacitor connected to a power grid and an electricity-taking and monitoring unit, the high-voltage capacitor is connected with the first control unit through the first communication unit, and the electricity-taking and monitoring unit is connected with the first control unit.
In a further aspect, the power-taking and monitoring unit includes a power-taking protection circuit, a power-taking circuit and a power-taking detection circuit, wherein an input terminal of the power-taking circuit is connected to the high-voltage capacitor, and is configured to convert a low-voltage ac signal after voltage reduction by the high-voltage capacitor into a dc voltage required by operation of each circuit, and provide a working power supply for the first control unit, and the power-taking protection circuit and the power-taking detection circuit are both connected to the power-taking circuit.
In a further scheme, the sensor unit is composed of a zero sequence voltage and zero sequence current sensor, a voltage sensor and a temperature and humidity sensor, wherein the zero sequence voltage and zero sequence current sensor is used for collecting zero sequence voltage and zero sequence current signals, the current sensor is used for collecting phase current signals, the voltage sensor is used for collecting phase voltage signals, and the temperature and humidity sensor is used for collecting temperature and humidity signals.
In a further scheme, the zero sequence voltage and zero sequence current sensor, the voltage sensor and the temperature and humidity sensor respectively process acquired analog signals through a filter circuit composed of operational amplifiers, and the analog signals are converted into digital signals through an ADC (analog to digital converter) circuit and input into the first control unit.
In order to achieve the second object, the digital PT-free intelligent operation and maintenance switch system provided by the invention comprises the digital PT-free intelligent operation and maintenance switch and an intelligent terminal, wherein the capacitor power-taking switch is connected with the intelligent terminal through a communication cable.
In a further scheme, the intelligent terminal comprises a second control unit, a second communication unit, a human-computer operation interface, an external device data acquisition unit and an energy storage unit, the second control unit is communicated with the first communication unit of the capacitor power-taking switch through the second communication unit, and the human-computer operation interface, the external device data acquisition unit and the energy storage unit are respectively connected with the second control unit.
In order to achieve the third object, the present invention provides an application method of a digital PT-free intelligent operation and maintenance switch, where the digital PT-free intelligent operation and maintenance switch system adopts the above digital PT-free intelligent operation and maintenance switch system, and the method includes the following steps: removing PT, adopting a high-voltage capacitor electricity taking unit to take electricity, obtaining high-voltage alternating current on a power grid, carrying out voltage reduction treatment on the high-voltage alternating current, and storing energy by using a super capacitor or a storage battery; the method comprises the following steps that various acquired analog signals are acquired by a sensor unit, signals are provided for measuring current, voltage, temperature and humidity, and the signals are input to a first control unit; a switch state detection unit is adopted to provide switch state signals for the first control unit, wherein the switch state signals comprise switch-on and switch-off states of a switch, gas leakage states of insulating gas and other switch state signals; the first control unit is adopted to control the operating mechanism to switch on and off, so that the output of the switching value is realized; the first communication unit is connected with the first control unit, and the capacitor power-taking switch is remotely monitored and controlled.
In a further scheme, the capacitor electricity-taking switch is connected with the intelligent terminal through a communication cable, the capacitor electricity-taking switch and the intelligent terminal are used for processing high-speed data and low-speed data in a labor-sharing mode through double CPUs, and the low-speed data comprise data of the Internet of things, fault recording data, fault data of all parts of equipment and the like and are uploaded to a main station.
Therefore, the beneficial effects of the invention are as follows:
1. by adopting the module detection method, the quick-wear part can be replaced without power failure, the defect that power failure must be performed firstly during replacement is avoided, and the maintenance efficiency is improved;
2. the double CPUs are adopted to process high-speed and low-speed data in a division manner, so that time delay caused by serial communication of the existing digital product is avoided, and the line protection has real-time performance;
3. the mechanical characteristics of the switch are analyzed from the current and voltage sampling data without increasing hardware cost, so that early diagnosis of the fault of the switch is performed, maintenance for passively processing the fault can be avoided to a great extent, and convenience is provided for maintenance after lightning stroke if lightning stroke pulse data are sorted from the current sampling data;
4. analog quantity and state quantity can be collected on site, switching-on and switching-off of a switch are controlled, a single chip microcomputer is used for analyzing collected current and voltage signals in a circuit in real time, fault types can be judged and processed quickly, and fault indication signals can be transmitted on site and remotely obviously;
5. the traditional electricity taking mode is changed, PT is removed, and electricity is taken by adopting a capacitor, so that the potential explosion hazard brought by the traditional PT is overcome, the safety of a power distribution system is favorably improved, the traditional PT is replaced by a small amount of electronic devices, the consumption of copper and silicon steel sheet-level resin and the like brought by the production of PT can be greatly saved, the material resources are saved, and the pollution to the environment during refining is reduced;
6. the communication unit is added to have a remote maintenance function, and remote control and remote parameter modification and setting can be performed.
Therefore, the invention has obvious social benefit and economic benefit.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a digital PT-free intelligent operation and maintenance switch according to the present invention.
Fig. 2 is a schematic diagram of an embodiment of the digital PT-free intelligent operation and maintenance switching system according to the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
The invention can automatically collect the voltage, current and switch state information of the line, automatically judge and process faults, automatically identify the types of short circuit and ground fault of the line, complete the monitoring of the line fault, avoid the time delay caused by the serial communication of the existing digital products and ensure the real-time performance and reliability of the line protection.
A digital PT-free intelligent operation and maintenance switch embodiment:
as shown in fig. 1, the digital PT-free intelligent operation and maintenance switch provided by the present invention includes a switch body 10, the switch body 10 is provided with a first control unit 11, a sensor unit, a switch state detection unit 12, an operating mechanism 13, a first communication unit 40, and a high-voltage capacitance power-taking unit connected to the first control unit 11, the sensor unit is connected to the first control unit 11 and configured to input an acquired analog signal to the first control unit 11, the first control unit 11 is connected to the switch state detection unit 12 and configured to form a switching value input/output unit to control the operating mechanism 13 to perform switching on and off, so as to output a switching value, and the first control unit 11 is connected to the first communication unit 40 and configured to perform remote monitoring and control on the capacitance power-taking switch.
In this embodiment, the capacitor-powered switch further includes a line loss measurement unit 14, where the line loss measurement unit 14 is connected to the first control unit 11, and is configured to provide calculation data such as active power, reactive power, and power factor required by line loss.
In this embodiment, the high voltage capacitor power-taking unit includes a high voltage capacitor 15 connected to the power grid and a power-taking and monitoring unit 16, the high voltage capacitor 15 is connected to the first control unit 11 through the first communication unit 40, and the power-taking and monitoring unit 16 is connected to the first control unit 11.
In this embodiment, the power-taking and monitoring unit 16 includes a power-taking protection circuit, a power-taking circuit and a power-taking detection circuit, an input end of the power-taking circuit is connected to the high-voltage capacitor 15, and is configured to convert a low-voltage ac signal, which is obtained by voltage reduction of the high-voltage capacitor 15, into a dc voltage required by operation of each circuit, and provide a working power supply for the first control unit 11, and the power-taking protection circuit and the power-taking detection circuit are both connected to the power-taking circuit.
Specifically, the power-taking protection circuit of the embodiment includes a breakdown bleeder element series array under abnormal high voltage; the power taking circuit mainly comprises a transformer, a switching tube and other devices and a voltage stabilizing control circuit, and has the main function of converting alternating current voltage after voltage reduction of the high-voltage capacitor 15 into direct current voltage required by system operation; the electricity-taking detection circuit mainly comprises devices and circuits such as a sampling resistor, a signal processing circuit, an AD conversion circuit and the like, and the electricity-taking protection circuit and the electricity-taking circuit are respectively monitored.
In this embodiment, the sensor unit is composed of a zero sequence voltage and zero sequence current sensor 17, a current sensor 18, a voltage sensor 19, and a temperature and humidity sensor 30, wherein the zero sequence voltage and zero sequence current sensor 17 is used for acquiring zero sequence voltage and zero sequence current signals, the current sensor 18 is used for acquiring phase current signals, the voltage sensor 19 is used for acquiring phase voltage signals, and the temperature and humidity sensor 30 is used for acquiring temperature and humidity signals.
The zero sequence voltage and zero sequence current sensor 17, the current sensor 18, the voltage sensor 19, and the temperature and humidity sensor 30 respectively process the acquired analog signals through a filter circuit composed of operational amplifiers, and convert the analog signals into digital signals through an ADC conversion circuit, and input the digital signals to the first control unit 11.
Therefore, the switch state detection unit 12 and the temperature and humidity sensor 30 are used for conveniently monitoring the switch state and the temperature and humidity change of the switch cabinet in real time.
Preferably, the switch state detection means 12 employs a stroke touch switch, a temperature sensor, and a pressure sensor, and can monitor the switch state in real time.
Specifically, the invention collects the voltage and current signals of the power distribution network through a general electronic/electromagnetic sensor (a voltage sensor 19, a current sensor 18 and the like) and converts the signals into analog quantity signals for output, the analog quantity signals output by the general sensor are input into a single chip microcomputer after being filtered by an operational amplification circuit, and the analog signals are converted into digital signals by an ADC (analog to digital converter) conversion circuit in the single chip microcomputer, so that the monitoring and the control of the on-column switch are realized.
The communication unit of this embodiment can be 485 communications, GPRS wireless communication and the extension data transmission module of the transmission of the extensible third party's agreement data to guarantee that it can realize the remote monitoring and the control to the column switch.
Preferably, the first control unit 11 adopts a single chip with a DSP core, which not only can implement a flexible control manner, but also can efficiently process data, is suitable for an occasion with a high requirement on reliability, and can quickly determine a fault and execute a predetermined opening command.
Preferably, the line loss measuring unit 14 of the present embodiment includes two signal interfaces, i.e., an electronic sensor and an electromagnetic sensor, and an external sensor signal is connected to the unit through a cable, and the unit calculates a line loss parameter in real time and transmits the calculation result to the first control unit 11 for further processing and analysis.
In a specific application, the compact capacitor power-taking switch of the invention mainly comprises:
the high-voltage capacitor 15 can be packaged in the switch pole or separately encapsulated and independently installed according to requirements, and mainly functions to reduce phase voltage into low-voltage alternating current;
the power taking and monitoring unit 16 is composed of three parts of circuits, namely a power taking protection circuit, a power taking circuit and a power taking detection circuit, is arranged in the switch cavity and can also be installed together with the high-voltage capacitor 15. The function is as follows: the power taking protection circuit is used for protecting the power taking circuit; the power taking circuit realizes an AC-DC function, namely converting the low-voltage alternating current after voltage reduction into direct current voltage required by the work of each circuit; the electricity taking detection circuit is used for monitoring the two parts.
A switch state detection unit 12 for detecting detection signals such as a switch state, which are obtained by a dedicated mechanical part and provide switch signals such as a switching on/off state of a switch and a gas leakage state of an insulating gas;
the line loss measuring unit 14 provides calculation data such as active power, reactive power, power factor and the like required by line loss, and can be generated by a special module or obtained by calculation together with a CPU (central processing unit);
a zero sequence voltage and zero sequence current sensor 17 connected with the switch pole for providing a voltage signal proportional to the zero sequence voltage and zero sequence current, and converting the voltage signal into a digital signal by signal processing and ADC;
the current sensors 18 are through sensors, are respectively sleeved on the three-phase conductors and are used for obtaining phase current signals in direct proportion to the phase current;
voltage sensors 19 connected to the three-phase conductors, respectively, for obtaining phase voltage signals proportional to the phase voltages;
the temperature and humidity sensor 30 is arranged in the switch cavity and used for sensing the temperature and the humidity in the switch cavity;
the operating mechanism 13 is positioned in the switch cavity and used for executing the opening and closing of the switch;
the first control unit 11(CPU1), which is an intelligent measurement and control unit of the compact capacitive power-taking switch of this embodiment, is disposed in the switch cavity, and is configured to collect the above-mentioned various data of the switch, and implement digital outward transmission; the quick protection is realized; enabling peer-to-peer communication with peripheral switches (which may communicate with a master station when CPU2 is not present); enabling communication with the intelligent terminal 20.
Furthermore, each module can be replaced in a charged mode through a special structure.
When there is no intelligent terminal 20, the capacitance power-taking switch of the embodiment is independent and can be used as a set of complete intelligent switch.
The embodiment of a digital PT-free intelligent operation and maintenance switch system comprises:
referring to fig. 2, the digital PT-free intelligent operation and maintenance switch system provided by the invention includes the digital PT-free intelligent operation and maintenance switch 10 and an intelligent terminal 20, and a capacitor power-taking switch is connected with the intelligent terminal 20 through a communication cable.
Further, the intelligent terminal 20 includes a second control unit 21(CPU2), a second communication unit 22, a human-machine operation interface 23, an external device data acquisition unit, and an energy storage unit, where the second control unit 21 communicates with the first communication unit 40 of the capacitor power switch through the second communication unit 22, and the human-machine operation interface 23, the external device data acquisition unit 24, and the energy storage unit 25 are connected to the second control unit 21 respectively.
As can be seen, the intelligent terminal 20 mainly processes data with low speed requirements, such as transmission of internet of things data and fault recording data uploaded to the master station and fault data of each part of the device; when the energy storage unit 25 is installed at the intelligent terminal 20, the intelligent terminal 20 is responsible for managing the energy storage unit 25; when the energy storage unit 25 is installed at the capacitor power switch, the energy storage unit 25 is managed by the CPU1 and communicates with the background.
The embodiment of the application method of the digital PT-free intelligent operation and maintenance switch comprises the following steps:
an application method of a digital PT-free intelligent operation and maintenance switch is applied to the digital PT-free intelligent operation and maintenance switch system, and the method comprises the following steps:
and removing PT, taking electricity by adopting an electricity taking unit of a high-voltage capacitor 15, obtaining high-voltage alternating current on a power grid, carrying out voltage reduction treatment on the high-voltage alternating current, and storing energy by using a super capacitor or a storage battery.
The sensor unit is used for collecting various acquired analog signals, providing signals for measuring current, voltage, temperature and humidity, and inputting the signals to the first control unit 11.
The switch state detection unit 12 is used for providing a switch state signal for the first control unit 11, wherein the switch state signal comprises switch-on/off state of a switch, gas leakage state of insulating gas and other switch state signals.
And the first control unit 11 is adopted to control the operating mechanism 13 to switch on and off, so that the output of the switching value is realized.
The first communication unit 40 is connected with the first control unit 11 to remotely monitor and control the capacitor power-taking switch.
Further, the capacitor power-taking switch is connected with the intelligent terminal 20 through a communication cable, the capacitor power-taking switch and the double CPUs of the intelligent terminal 20 are used for processing high-speed data and low-speed data in a labor-sharing mode, and the low-speed data comprise data of the internet of things, fault recording data, fault data of all parts of equipment and the like and are uploaded to a main station.
Therefore, the beneficial effects of the invention are as follows:
1. by adopting the module detection method, the quick-wear part can be replaced without power failure, the defect that power failure must be performed firstly during replacement is avoided, and the maintenance efficiency is improved;
2. the double CPUs are adopted to process high-speed and low-speed data in a division manner, so that time delay caused by serial communication of the existing digital product is avoided, and the line protection has real-time performance;
3. the mechanical characteristics of the switch are analyzed from the current and voltage sampling data without increasing hardware cost, so that early diagnosis of the fault of the switch is performed, maintenance for passively processing the fault can be avoided to a great extent, and convenience is provided for maintenance after lightning stroke if lightning stroke pulse data are sorted from the current sampling data;
4. analog quantity and state quantity can be collected on site, switching-on and switching-off of a switch are controlled, a single chip microcomputer is used for analyzing collected current and voltage signals in a circuit in real time, fault types can be judged and processed quickly, and fault indication signals can be transmitted on site and remotely obviously;
5. the traditional electricity taking mode is changed, PT is removed, and electricity is taken by adopting a capacitor, so that the potential explosion hazard brought by the traditional PT is overcome, the safety of a power distribution system is favorably improved, the traditional PT is replaced by a small amount of electronic devices, the consumption of copper and silicon steel sheet-level resin and the like brought by the production of PT can be greatly saved, the material resources are saved, and the pollution to the environment during refining is reduced;
6. the communication unit is added to have a remote maintenance function, and remote control and remote parameter modification and setting can be performed.
Therefore, the invention has obvious social benefit and economic benefit.
The foregoing describes the general principles of the present disclosure in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present disclosure are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present disclosure. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the disclosure is not intended to be limited to the specific details so described.
The block diagrams of devices, apparatuses, systems referred to in this disclosure are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a PT intelligence fortune dimension switch is exempted from to digital, its characterized in that includes:
the switch comprises a first control unit, a sensor unit, a switch state detection unit, an operating mechanism, a first communication unit and a high-voltage capacitor power-taking unit connected with the first control unit, wherein the sensor unit is connected with the first control unit and used for inputting acquired analog signals to the first control unit, the first control unit is connected with the switch state detection unit to form switch input/output unit control, the operating mechanism is switched on and off to realize the output of switch quantity, and the first control unit is connected with the first communication unit and used for remotely monitoring and controlling the capacitor power-taking switch.
2. The digital PT-free intelligent operation and maintenance switch according to claim 1, wherein:
the capacitor electricity-taking switch further comprises a line loss measuring unit, and the line loss measuring unit is connected with the first control unit.
3. The digital PT-free intelligent operation and maintenance switch according to claim 1, wherein:
the high-voltage capacitor electricity taking unit comprises a high-voltage capacitor connected to a power grid and an electricity taking and monitoring unit, the high-voltage capacitor is connected with the first control unit through the first communication unit, and the electricity taking and monitoring unit is connected with the first control unit.
4. The digital PT-free intelligent operation and maintenance switch according to claim 3, wherein:
the power taking and monitoring unit comprises a power taking protection circuit, a power taking circuit and a power taking detection circuit, wherein the input end of the power taking circuit is connected with the high-voltage capacitor, and is used for converting low-voltage alternating-current signals obtained after the voltage of the high-voltage capacitor is reduced into direct-current voltages required by the work of each circuit and providing a working power supply for the first control unit, and the power taking protection circuit and the power taking detection circuit are connected with the power taking circuit.
5. The digital PT-free intelligent operation and maintenance switch according to any one of claims 1 to 4, wherein:
the sensor unit comprises zero sequence voltage and zero sequence current sensor, voltage sensor, temperature and humidity sensor, wherein, zero sequence voltage and zero sequence current sensor are used for gathering zero sequence voltage and zero sequence current signal, current sensor is used for gathering the phase current signal, voltage sensor is used for gathering the looks voltage signal, temperature and humidity sensor is used for gathering the temperature and humidity signal.
6. The digital PT-free intelligent operation and maintenance switch according to claim 5, wherein:
the zero sequence voltage and zero sequence current sensor, the voltage sensor and the temperature and humidity sensor respectively process the acquired analog signals through a filter circuit consisting of an operational amplifier, and the analog signals are converted into digital signals through an ADC (analog to digital converter) circuit and input into the first control unit.
7. The utility model provides a PT intelligence fortune dimension switching system is exempted from to digital, its characterized in that includes:
the digital PT-free intelligent operation and maintenance switch and the intelligent terminal as claimed in any one of claims 1 to 6, wherein the capacitance power-taking switch is connected with the intelligent terminal through a communication cable.
8. The system of claim 7, wherein:
the intelligent terminal comprises a second control unit, a second communication unit, a man-machine operation interface, an external device data acquisition unit and an energy storage unit, wherein the second control unit is communicated with the first communication unit of the capacitor power-taking switch through the second communication unit, and the man-machine operation interface, the external device data acquisition unit and the energy storage unit are respectively connected with the second control unit.
9. An application method of a digital PT-free intelligent operation and maintenance switch system, wherein the digital PT-free intelligent operation and maintenance switch system is the digital PT-free intelligent operation and maintenance switch system according to any one of claims 7 to 8, and the method includes the following steps:
removing PT, adopting a high-voltage capacitor electricity taking unit to take electricity, obtaining high-voltage alternating current on a power grid, carrying out voltage reduction treatment on the high-voltage alternating current, and storing energy by using a super capacitor or a storage battery;
the method comprises the following steps that various acquired analog signals are acquired by a sensor unit, signals are provided for measuring current, voltage, temperature and humidity, and the signals are input to a first control unit;
a switch state detection unit is adopted to provide switch state signals for the first control unit, wherein the switch state signals comprise switch-on and switch-off states of a switch, gas leakage states of insulating gas and other switch state signals;
the first control unit is adopted to control the operating mechanism to switch on and off, so that the output of the switching value is realized;
the first communication unit is connected with the first control unit, and the capacitor power-taking switch is remotely monitored and controlled.
10. The method of claim 9, wherein:
the capacitor power-taking switch is connected with the intelligent terminal through a communication cable, the capacitor power-taking switch and the double CPUs of the intelligent terminal are used for processing high-speed data and low-speed data in a labor-sharing mode, and the low-speed data comprise data of an internet of things, fault recording data, fault data of all parts of equipment and the like and are uploaded to a main station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011424184.6A CN112486077A (en) | 2020-12-08 | 2020-12-08 | Digital PT-free intelligent operation and maintenance switch, system and application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011424184.6A CN112486077A (en) | 2020-12-08 | 2020-12-08 | Digital PT-free intelligent operation and maintenance switch, system and application method |
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| Publication Number | Publication Date |
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| CN112486077A true CN112486077A (en) | 2021-03-12 |
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| CN202011424184.6A Pending CN112486077A (en) | 2020-12-08 | 2020-12-08 | Digital PT-free intelligent operation and maintenance switch, system and application method |
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2020
- 2020-12-08 CN CN202011424184.6A patent/CN112486077A/en active Pending
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