CN106526288A - Transmission line voltage and current monitoring system and method - Google Patents
Transmission line voltage and current monitoring system and method Download PDFInfo
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- CN106526288A CN106526288A CN201611214923.2A CN201611214923A CN106526288A CN 106526288 A CN106526288 A CN 106526288A CN 201611214923 A CN201611214923 A CN 201611214923A CN 106526288 A CN106526288 A CN 106526288A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The present invention relates to a transmission line voltage and current monitoring system and method. The system comprises a ceramic capacitor insulator voltage divider, a current transformer, and a voltage and current monitoring device. A ceramic capacitor insulator comprises a high voltage arm and a lower voltage arm electrically connected in order. The lower voltage arm is electrically connected to a high voltage transmission line, and the high voltage arm is electrically connected to a ground wire. The voltage and current monitoring device is connected to the current transformer and the lower voltage arm of the ceramic capacitor insulator. The voltage and current monitoring device is equipotential with the high voltage transmission line and is fixed to the high voltage transmission line. Through using the monitoring system provided by the embodiment of the invention, a line fault can be judged by using flip type ceramic capacitor voltage divider unit power supply, the overvoltage of a collection line, the voltage in a short circuit fault and the fault current of a current transformer acquisition circuit, thus the fault reason analysis, fault finding and fault self-recovery can be effectively guided, and the system and method have an important significance for the safe and stable operation of a power system.
Description
Technical field
The present invention relates to the technical field of power system voltage current monitoring, more particularly to adopt ceramic condenser insulator structure
Into the transmission line of electricity voltage x current monitoring system and method for flip-over type partial pressure unit.
Background technology
At present, the method for transmission line of electricity monitoring current adopts the method for current transformer, monitoring voltage to adopt mutual induction of voltage
Device, but there is power taking on transmission line of electricity in the electric current and voltage monitor of routine, and invest big.For high voltage power transmission
The fault detector that line fault positioning is used, is only capable of monitoring current.In recent years, Yunnan DianKeYuan is proposed and adopts ceramic condenser
The method of insulator positive-installed partial pressure unit structure monitoring line over-voltage and automatic electricity getting.However, for positive-installed structure, such as will
The Current Transformer Secondary line of fault detector is directly connected with monitoring device, may cause circuit because of fault detector failure
Failure and whole monitoring device is burnt, therefore, two sets of different monitoring devices can only be adopted.
As the construction of intelligent grid proposes very high request for power transmission line intelligent, such as fault self-recovery, failure is fixed
Position, Fault Identification etc. are required for the new breakthrough of monitoring technology and sensor, therefore research and develop small-sized, safe and stable, cheap
Transmission line of electricity voltage x current monitoring device it is significant.
The content of the invention
For overcoming problem present in correlation technique, the present invention to provide a kind of transmission line of electricity voltage x current monitoring system and side
Method.
First aspect according to embodiments of the present invention, there is provided a kind of transmission line of electricity voltage x current monitoring system and method, bag
Ceramic condenser insulator bleeder mechanism, current transformer and voltage x current monitoring device is included, wherein：
The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, and the low-voltage arm electrical connection is paramount
Pressure transmission line, the high-voltage arm be electrically connected to ground；
The current transformer suit is arranged on transmission line of electricity；
The voltage x current monitoring device is connected with the low-voltage arm of the current transformer and ceramic condenser insulator respectively.
Preferably, the voltage x current monitoring device includes current signal process circuit, voltage signal processing circuit, signal
Change-over circuit and processor, wherein：
The current signal process circuit is electrically connected with the current transformer, and the voltage signal processing circuit is connected to
Between the low-voltage arm of the ceramic condenser insulator and high-voltage arm；
The current signal process circuit and voltage signal processing circuit are electrically connected with the signaling conversion circuit respectively；
The signaling conversion circuit is electrically connected with the processor.
Preferably, the voltage x current monitoring device also includes transport module, the transport module and processor electricity
Connect, and the transport module is connected with backstage spark gap status monitoring center to center communications, the transport module is set to GPRS moulds
Block or WIFI module.
Preferably, the voltage x current monitoring device also includes build-out resistor, described build-out resistor one end and the ceramics
The low-voltage arm electrical connection of capacitive isolator, the other end are electrically connected with the voltage signal processing circuit.
Preferably, the voltage x current monitoring device also includes electricity-fetching module, and the electricity-fetching module is respectively electrically connected to institute
State current signal process circuit, voltage signal processing circuit, signaling conversion circuit and processor.
Preferably, the intrinsic standoff ratio between the high-voltage arm and low-voltage arm is 500-3000, and the capacitance of the high-voltage arm is
10pF-10nF, the capacitance of the low-voltage arm is 10nF-10uF.
Second aspect according to embodiments of the present invention, there is provided a kind of transmission line of electricity voltage x current monitoring system and method, bag
Include：
The electric current of the current transformer being arranged on transmission line of electricity is obtained in real time, and in ceramic condenser insulator low-voltage arm
Voltage；
Judge whether the voltage is more than 1.2 times or 1.5 times of system voltage, or, judge whether the voltage contains
The high-frequency signal of 500Hz-2000Hz；Or judge whether electric current is more than 1.1 times of circuit rated current, wherein, for neutrality
Point effectively earthed system judges whether the voltage is more than 1.2 times of system voltage, for system with non effectively earth ed neutral is sentenced
Whether the voltage that breaks is more than 1.5 times of system voltage；
When the voltage is more than 1.2 times or 1.5 times of system voltage, or, when containing 500Hz- in the voltage
During the high-frequency signal of 2000Hz, or electric current more than 1.1 times of circuit rated current when, start voltage x current monitoring device record
Voltage waveform and current waveform in 20-100ms, and send to back-end data monitoring, diagnosing center.
The technical scheme that embodiments of the invention are provided can include following beneficial effect：
Transmission line of electricity voltage x current monitoring system provided in an embodiment of the present invention and device include ceramic condenser insulator point
Pressure device, current transformer and voltage x current monitoring device, wherein：The current transformer suit is arranged on transmission line of electricity
On；The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, and it is defeated that the low-voltage arm is electrically connected to high pressure
Electric line, the high-voltage arm be electrically connected to ground；The voltage x current monitoring device respectively with the current transformer and ceramics
Capacitive isolator connects.By can be according to ceramic condenser insulator using monitoring system provided in an embodiment of the present invention and method
High-voltage arm and low-voltage arm constitute partial pressure unit, monitor transmission line of electricity voltage, according to current transformer monitor transmission line of electricity
Electric current, so as to the state to transmission line of electricity carries out monitor in real time, and provide data for accident analysis, fault self-recovery etc..Meanwhile,
The advantages of using higfh-tension ceramics capacitive isolator dielectric strength height, good mechanical property, low price, directly hang on transmission line of electricity
Partial pressure unit, and power taking and potentiometer effect is constituted, is capable of the power-frequency voltage, temporary transient excessively electric of complete and accurate ground record transmission line of electricity
Pressure, switching overvoltage, lightning surge waveform, the failure electricity of the circuit obtained with reference to the current transformer installed on the line
Stream, using the voltage of circuit, current waveform can real-time judge transmission line of electricity running status, can greatly reduce needs failure
The loss for causing, and accident analysis, fault location, Fault Isolation can be effectively instructed, improve the safe operation water of power system
It is flat.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
The present invention can be limited.
Description of the drawings
During accompanying drawing herein is merged in description and the part of this specification is constituted, show the enforcement for meeting the present invention
Example, and be used for explaining the principle of the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of transmission line of electricity voltage x current monitoring system provided in an embodiment of the present invention；
Fig. 2 is a kind of theory structure schematic diagram of transmission line of electricity voltage x current monitoring system provided in an embodiment of the present invention；
Fig. 3 is a kind of transmission line of electricity voltage x current monitoring method provided in an embodiment of the present invention.
Specific embodiment
Here in detail exemplary embodiment will be illustrated, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with as appended by
The example of consistent apparatus and method in terms of some described in detail in claims, the present invention.
Fig. 1 is a kind of structural representation of the transmission line of electricity voltage x current monitoring system according to an exemplary embodiment
Figure.
As shown in figure 1, the transmission line of electricity voltage x current monitoring system includes ceramic condenser insulator bleeder mechanism 1, electric current
Transformer 2, voltage x current monitoring device 3, ultra-high-tension power transmission line, shaft tower and back-end data monitoring, diagnosing center 4.Wherein,
The suit of the current transformer 2 is arranged on ultra-high-tension power transmission line, for monitoring the electric current of ultra-high-tension power transmission line, and
The current transformer 2 is fixed on the line；The ceramic condenser insulator bleeder mechanism 1 includes the high-voltage arm being sequentially connected electrically
C1 and low-voltage arm C2, low-voltage arm C2 are electrically connected to ultra-high-tension power transmission line, the high-voltage arm C1 be electrically connected to ground so that
High-voltage arm C1 and low-voltage arm C2 constitute partial pressure unit, and wherein, the intrinsic standoff ratio between the high-voltage arm C1 and low-voltage arm C2 is 500-
The capacitance of 3000, the high-voltage arm C1 is 10pF-10nF, and the capacitance of low-voltage arm C2 is 10nF-10uF；The voltage
Current monitoring device 3 is connected with the current transformer 2 and ceramic condenser insulator bleeder mechanism 1 respectively, the voltage x current
Monitoring device 3 is communicated to connect with back-end data monitoring, diagnosing center 4.So as to the voltage that will be gathered by voltage x current monitoring device 3
Send to back-end data monitoring, diagnosing center 4 with current signal, so that back-end data monitoring, diagnosing center 4 is according to the current wave
The change of shape and voltage waveform determines the state of transmission line of electricity.
In addition, referring to Fig. 2, being transmission line of electricity voltage x current Fundamentals of Supervisory Systems structural representation provided in an embodiment of the present invention
Figure, as shown in Fig. 2 the system include ultra-high-tension power transmission line, ceramic condenser insulator bleeder mechanism 1, current transformer 2, and
Voltage x current monitoring device 3.
In embodiments of the present invention, the ceramic condenser insulator bleeder mechanism 1 is included by high-voltage arm C1 and low-voltage arm C2
The partial pressure unit of composition, in embodiments of the present invention, the capacitance of the high-voltage arm C1 can be 10pF-10nF, the low pressure
The capacitance of arm can be 10nF-10uF；Current transformer sleeved 2 on the transmission line of electricity.
Wherein, the voltage x current monitoring device 3 include current signal process circuit 32, voltage signal processing circuit 31,
Signaling conversion circuit 33 and processor 34, in embodiments of the present invention, at the current signal process circuit 32 and voltage signal
Reason circuit 31 can be referred to as data acquisition circuit, be mainly used in collection voltages and current signal；Wherein, the current signal is processed
Circuit 32 is electrically connected with the current transformer 2, for receiving the transmission line of electricity electric current of the collection of current transformer 2；The voltage
Signal processing circuit 31 is connected between the low-voltage arm of the ceramic condenser insulator bleeder mechanism 1 and high-voltage arm, for receiving
The voltage of transmission line of electricity；And the current signal process circuit 32 and voltage signal processing circuit 31 are changed with the signal respectively
Circuit 33 is electrically connected, and the signaling conversion circuit 33 is electrically connected with the processor 34, so that current signal process circuit
32 and voltage signal processing circuit 31 collection electric current and voltage signal carry out modulus or digital-to-analogue conversion, be easy to processor 34 direct
Process to digital signal.
In embodiments of the present invention, the voltage x current monitoring device 3 also includes transport module and electricity-fetching module 35, described
Electricity-fetching module 35 is respectively electrically connected to the current signal process circuit 32, voltage signal processing circuit 31, signaling conversion circuit
33 and processor 34, and the electricity-fetching module 35 is additionally coupled to low-voltage arm C2 and the high pressure of ceramic condenser insulator bleeder mechanism 1
Between arm C1, so that electric energy is obtained by the electricity-fetching module 35 by ceramic condenser insulator, and process electricity for the current signal
Road 32, voltage signal processing circuit 31, signaling conversion circuit 33 and processor 34 are powered, and the transport module and the process
Device 34 is electrically connected, and the transport module is communicated to connect with back-end data monitoring, diagnosing center 4, in specific implementation process, institute
State transport module and be set to GPRS module or WIFI module.
In addition, in transmission line of electricity voltage x current monitoring system provided in an embodiment of the present invention, the voltage x current monitoring
Device 3 also includes build-out resistor R, the low-voltage arm of one end of build-out resistor R and the ceramic condenser insulator bleeder mechanism
C2 is electrically connected, and the other end of build-out resistor R is electrically connected with the voltage signal processing circuit.
By using transmission line of electricity voltage x current monitoring system provided in an embodiment of the present invention, by voltage x current monitoring being
System gathers the electric current and voltage of transmission line of electricity respectively, and wherein, high voltage ceramic capacitor is the ring with dielectric ceramic as core material
The capacitor of epoxy resin embedding, which has dielectric strength high, the features such as small volume and good frequency characteristic, is widely used as matching somebody with somebody
The sectional pressure element of net switch cabinet electricity detection equipment.Therefore the feature can be utilized, is encapsulated inside insulation column or is manufactured into height
The various transmission line of electricity ceramic condenser insulator of dielectric strength, is joined directly together or is connected in parallel on leakage conductor two with transmission line of electricity
End, constitutes partial pressure unit, realizes that power system voltage is monitored.With reference to the defeated of the current transformer acquisition on transmission line of electricity
Electric line electric current, judges the state of transmission line of electricity using the voltage current waveform of transmission line of electricity, can effectively solving high voltage transmission line
The problems such as accident analysis on road, fault location, Fault Isolation.
Meanwhile, the advantages of using higfh-tension ceramics capacitive isolator dielectric strength height, good mechanical property, low price, directly
Hang over, and power taking and potentiometer effect, it is capable of the electricity of complete and accurate ground record transmission line of electricity
Corrugating, with reference to the current waveform that the current transformer on transmission line of electricity is obtained, using the current waveform using transmission line of electricity, electricity
Corrugating can determine whether the running status on power main road, so as to effectively improve the accident analysis to transmission line of electricity, fault location,
Fault Isolation precision.
Referring to Fig. 3, it is a kind of transmission line of electricity measure voltage ＆ current method flow schematic diagram provided in an embodiment of the present invention.
In step S101, the electric current of the current transformer that be arranged on transmission line of electricity on, and ceramic condenser are obtained in real time
Voltage in insulator low-voltage arm.
In embodiments of the present invention, current monitoring power transmission line can be processed by the current signal in voltage x current monitoring device
The electric current of the current transformer on road, and the electricity in ceramic condenser insulator low-voltage arm is monitored by voltage signal processing circuit
Pressure.Voltage signal processing circuit and current signal process circuit send the voltage and current for getting to signaling conversion circuit,
Digital signal is converted electrical signals to by signaling conversion circuit to send to processor.
In step s 102, judge whether voltage is more than 1.2 times or 1.5 times of system voltage, or, whether judge voltage
High-frequency signal containing 500Hz-2000Hz；Or judge whether electric current is more than 1.1 times of circuit rated current, wherein, for
System with effectively earthed neutral judges whether the voltage is more than 1.2 times of system voltage, for neutral non-effective grounding system
System judges whether the voltage is more than 1.5 times of system voltage.
The digital signal that processor analysis is received, judges whether voltage is more than 1.2 times or 1.5 times of system voltage, or
Whether person, judge the voltage whether high-frequency signal containing 500Hz-2000Hz, or judge electric current more than circuit rated current
1.2 again.Processor judges electricity in the digital signal that analysis is received according to the corresponding curtage signal of digital signal
The size of pressure or electric current.Wherein, for system with effectively earthed neutral judges whether voltage is more than 1.5 times of system voltage.
In step s 103, when voltage is more than 1.2 times or 1.5 times of system voltage, or, when containing in voltage
During the high-frequency signal of 500Hz-2000Hz, or electric current more than 1.1 times of circuit rated current when, start voltage x current monitoring dress
The voltage waveform and current waveform in record 20-100ms is put, and is sent to back-end data monitoring, diagnosing center.
During judgement in step S102 is met, processor control starts voltage and current detecting device disease record 20-100ms
Interior voltage waveform and current waveform, and send to back-end data checkout and diagnosis center, are sent to rear by GPRS or WIFI
Number of units is according to checkout and diagnosis center.
Data Detection diagnostic center, is counted when voltage starter according to the voltage waveform or current waveform for receiving
Frequency domain, the time domain charactreristic parameter of voltage waveform is calculated, temporary overvoltage, switching overvoltage, thunder and lightning or voltage type is judged；Work as electric current
When amount starter or voltage x current start simultaneously, calculate the parameters such as electric current, voltage magnitude, phase place and differentiated using impedance magnitude
Method etc. obtains the trouble point of circuit or isolated fault.
Seen from the above description, transmission line of electricity voltage x current monitoring system provided in an embodiment of the present invention and method, overcome
During ceramic condenser insulator formal dress, line fault may be caused because of fault detector failure and whole monitoring device is burnt
Problem.By ceramic condenser insulator is inverted on transmission line of electricity, voltage x current monitoring device and ceramic condenser insulator
The low-voltage arm electrical connection of the partial pressure unit that high-voltage arm and low-voltage arm are formed, monitors the voltage of transmission line of electricity, according to current transformer
The electric current of detection transmission line of electricity, so as to be monitored to the state of transmission line of electricity.
Those skilled in the art will readily occur to its of the present invention after considering description and putting into practice disclosure of the invention here
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is limited only by appended claim.
Claims (8)
1. a kind of transmission line of electricity voltage x current monitoring system, it is characterised in that including ceramic condenser insulator bleeder mechanism, electric current
Transformer, voltage x current monitoring device and back-end data monitoring, diagnosing center, wherein：
The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, and it is defeated that the low-voltage arm is electrically connected to high pressure
Electric line, the high-voltage arm be electrically connected to ground；
The current transformer suit is arranged on transmission line of electricity；
The voltage x current monitoring device is connected with the low-voltage arm of the current transformer and ceramic condenser insulator respectively.
2. system according to claim 1, it is characterised in that the voltage x current monitoring device is arranged on transmission line of electricity
With electric transmission line equipotential, including current signal process circuit, voltage signal processing circuit, signaling conversion circuit and processor,
Wherein：
The current signal process circuit is electrically connected with the current transformer, and the voltage signal processing circuit is connected to described
Between the low-voltage arm of ceramic condenser insulator and high-voltage arm；
The current signal process circuit and voltage signal processing circuit are electrically connected with the signaling conversion circuit respectively；
The signaling conversion circuit is electrically connected with the processor.
3. system according to claim 2, it is characterised in that the voltage x current monitoring device also includes transport module,
The transport module is electrically connected with the processor, and the transport module is connected with back-end data monitoring, diagnosing center to center communications,
The transport module is set to GPRS module or WIFI module.
4. system according to claim 2, it is characterised in that the voltage x current monitoring device also includes build-out resistor,
Described build-out resistor one end is electrically connected with the low-voltage arm of the ceramic condenser insulator, and the other end and voltage signal process are electric
Road electrically connects.
5. system according to claim 2, it is characterised in that the voltage x current monitoring device also includes electricity-fetching module,
The electricity-fetching module be respectively electrically connected to the current signal process circuit, voltage signal processing circuit, signaling conversion circuit and
Processor.
6. system according to claim 1, it is characterised in that the intrinsic standoff ratio between the high-voltage arm and low-voltage arm is 500-
3000, the capacitance of the high-voltage arm is 10pF-10nF, and the capacitance of the low-voltage arm is 10nF-10uF.
7. a kind of transmission line of electricity voltage x current monitoring method, it is characterised in that include：
The electric current of the current transformer being arranged on transmission line of electricity, and the electricity in ceramic condenser insulator low-voltage arm is obtained in real time
Pressure；
Judge whether the voltage is more than 1.2 times or 1.5 times of system voltage, or, judge whether the voltage contains
The high-frequency signal of 500Hz-2000Hz；Or judge whether electric current is more than 1.1 times of circuit rated current, wherein, for neutrality
Point effectively earthed system judges whether the voltage is more than 1.2 times of system voltage, for system with non effectively earth ed neutral is sentenced
Whether the voltage that breaks is more than 1.5 times of system voltage；
When the voltage is more than 1.2 times or 1.5 times of system voltage, or, when containing 500Hz-2000Hz in the voltage
High-frequency signal when, or electric current more than 1.1 times of circuit rated current when, start voltage x current monitoring device record 20-
Voltage waveform and current waveform in 100ms, and send to back-end data monitoring, diagnosing center.
8. method according to claim 7, it is characterised in that methods described also includes：
Voltage waveform in the 20-100ms of record, current waveform are sent to back-end data monitoring, diagnosing center, works as voltage
Frequency domain, the temporal signatures parameter of voltage waveform during starter, is calculated, judges that temporary overvoltage, switching overvoltage, thunder and lightning are excessively electric
Pressure type；When magnitude of current starter or voltage x current start simultaneously, calculate the parameters such as electric current, voltage magnitude, phase place and adopt
Trouble point or the isolated fault of circuit are obtained with impedance magnitude diagnostic method etc..
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| CN111239544A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Method for positioning lightning overvoltage fault point |
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| CN111652421A (en) * | 2020-05-26 | 2020-09-11 | 广东电网有限责任公司东莞供电局 | Electricity testing evaluation method and device based on principal component analysis and fuzzy classification |
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| CN112083265A (en) * | 2020-08-04 | 2020-12-15 | 重庆泽瑞电力科技有限公司 | Fault indication system and composite insulator |
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| CN112083265A (en) * | 2020-08-04 | 2020-12-15 | 重庆泽瑞电力科技有限公司 | Fault indication system and composite insulator |
| CN111983288A (en) * | 2020-08-17 | 2020-11-24 | 国网河南省电力公司电力科学研究院 | Voltage test system and method for high-voltage power equipment |
| CN113567885A (en) * | 2021-07-22 | 2021-10-29 | 广东电网有限责任公司 | Ground wire insulator fault early warning device and early warning method thereof |
| CN113567885B (en) * | 2021-07-22 | 2023-05-16 | 广东电网有限责任公司 | Ground wire insulator fault early warning device and early warning method thereof |
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Application publication date: 20170322 |