CN105353792B - A kind of reactive power compensator with capacitor temperature detection and defencive function - Google Patents
A kind of reactive power compensator with capacitor temperature detection and defencive function Download PDFInfo
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- CN105353792B CN105353792B CN201510908142.2A CN201510908142A CN105353792B CN 105353792 B CN105353792 B CN 105353792B CN 201510908142 A CN201510908142 A CN 201510908142A CN 105353792 B CN105353792 B CN 105353792B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The present invention discloses a kind of reactive power compensator with capacitor temperature detection and defencive function; including key control unit, electric parameter acquisition unit, temperature detecting unit, output alarm and temperature control unit; the temperature parameter of the real-time sensing capacitor top casing of temperature detecting unit; and input key control unit and handled; key control unit is according to the skin temperature of capacitor and the corresponding relation of internal temperature; it is equivalent go out capacitor internal temperature so that judge capacitor internal temperature whether exceed predetermined value；When a certain capacitor temperature exceeds predetermined value; key control unit sends control signal; cut off the capacitor; output alarm and temperature control unit triggering carry out sound and light alarm, capacitor are cooled; put into operation another spare capacitor simultaneously, so, because capacitor employs temperature detection and defencive function; the life-span of capacitor is effectively improved, the safety of power system has been ensured.
Description
Technical field
It is particularly a kind of to provide high temperature protection for capacitor the present invention relates to the reactive power compensation technology of high-voltage electric power system
Reactive power compensator.
Background technology
With progressively going deep into for electric network reconstruction, the high speed development of power matching network technology, reactive power compensator is adopted on a large scale
With.The power capacitor used in reactive power compensator, its Solid dielectric breakdown field strength is influenceed very big by capacitor internal temperature,
Therefore need to be monitored its temperature.But because capacitor internal element is sealed in inside steel plate box, electricity is measured in operation
Container internal temperature is relatively difficult to achieve, also unrealistic.And the too high capacitor life-span that easily causes of internal temperature is reduced, or even there is heat
Puncture and cause to damage；Meanwhile, if capacitor internal temperature is too high, dielectric can decompose a large amount of gases, capacitor case
Expansion, even blast can be produced when serious.Traditional technology does not have preferable solution to this at present.
Root is it was found that capacitor life-span and temperature are shown as " octave principle ", i.e. the normal prototype highest temperature of conventional capacitor
Spend for 70 DEG C, capacitor internal peak temperature often raises 8 DEG C, and capacitor life-span can shorten half；Applicant is by testing table
Bright, under room temperature condition, high-voltage capacitance is when 1.2 times of rated capacities are run, when shell maximum temperature is higher than environment temperature 8-10 DEG C,
Capacitor internal temperature reaches 70-90 DEG C.Therefore, it is to the improved thinking of prior art：Can be according to electric in reactive power compensator
The skin temperature of container and the relation of internal temperature, come it is equivalent go out capacitor internal temperature, realize in high-voltage electric power system
Capacitor is monitored and protected.
The content of the invention
The purpose of the present invention be for above-mentioned prior art weak point there is provided one kind have capacitor temperature detection and
The reactive power compensator of defencive function, according to capacitor case temperature parameter it is equivalent go out capacitor internal temperature, complete to electric capacity
The detection of device internal temperature, can effectively improve the life-span of capacitor, improve the security of power system, with reasonability, feasible
Property.
The purpose of the present invention is achieved by the following technical solution：One kind has capacitor temperature detection and defencive function
Reactive power compensator, include key control unit, electric parameter acquisition unit, temperature detecting unit, output alarm and temperature
Spend control unit, it is characterised in that：The input of key control unit respectively with electric parameter acquisition unit and temperature detection list
Member is connected, wherein, electric parameter acquisition unit accesses power system by sensor, and temperature detecting unit passes through RS485 buses
It is connected with key control unit, the output termination output alarm of key control unit and temperature control unit；Electric parameter acquisition
Unit acquisition system parameters of electric power, by accessing key control unit, the real-time sensing capacitor of temperature detecting unit after AD conversion
The temperature parameter of top casing, and input key control unit and handled, key control unit is according to the shell temperature of capacitor
Degree and the corresponding relation of internal temperature, it is equivalent go out capacitor internal temperature, so as to judge whether capacitor internal temperature exceeds
Predetermined value；When a certain capacitor temperature exceeds predetermined value, key control unit sends control signal, cuts off the capacitor, defeated
Go out alarm and temperature control unit triggering carries out sound and light alarm, capacitor cooled, while another standby electricity that puts into operation
Container.
Further, the key control unit is made up of data processing module and capacitor switching module；Capacitor switching mould
Block is connected by internal bus with data processing module；The number that data processing module is sent in real time according to electric parameter acquisition unit
According to, power system reactive power parameter is calculated, when power factor does not reach specified value, the startup of capacitor switching module, input is accordingly
Capacitor；When the added time occurred in system, capacitor switching module cuts off corresponding capacitor, to keep power factor in stated number
In value, while data processing module is connected by RS485 buses with temperature detecting unit, the temperature from temperature detecting unit is handled
Spend signal, real-time sensing capacitor skin temperature and environment temperature.
The electric parameter acquisition unit is made up of sensor and A/D converter circuit, collecting sensor signal end and power train
Voltage transformer secondary side is connected in system, and the other end passes through A/D converter circuit and the data processing module phase in key control unit
Even.
The temperature detecting unit is made up of multigroup infrared temperature sensor and temperature forwarding/receiving module, a part of red
The thermometric end alignment capacitor top shell of outer hygrosensor, for gathering capacitor case temperature；Another part infrared temperature
Degree detector is located remotely from the high-voltage board of capacitor, for measuring environment temperature in cabinet；The infrared temperature sensor other end leads to
Cross to be wirelessly transferred and be connected with temperature forwarding/receiving module；Temperature forwarding/receiving module is controlled single by RS485 buses and core
Member connection, key control unit according to the corresponding relation between capacitor case and internal temperature, it is equivalent go out capacitor internal temperature
Degree.
The output alarm and temperature control unit are made up of alarm lamp, drive circuit, heat sink, drive circuit
One end is connected with key control unit, and the other end is connected by shielding line with heat sink.
Research shows that capacitor life-span is shown as " octave principle " with temperature, i.e. the normal prototype highest temperature of conventional capacitor
Spend for 70 DEG C, capacitor internal peak temperature often raises 8 DEG C, and capacitor life-span can shorten half.At ambient temperature, high pressure
Electric capacity is when 1.2 times of rated capacities are run, and when shell maximum temperature is higher than environment temperature 8-10 DEG C, capacitor internal temperature reaches
To 70-90 DEG C.According to this experimental data, the skin temperature of capacitor and the corresponding relation of internal temperature may establish that.
Beneficial effects of the present invention：
The present invention is using the skin temperature of capacitor and the corresponding relation of internal temperature, by the temperature for detecting capacitor case
Degree come it is equivalent determination capacitor internal temperature, thus can very accurately and timely measure capacitor operation when inside temperature
Degree.When internal temperature is too high, the too high capacitor of temperature is cut off in time, while putting into spare capacitor；It is too high to temperature
Capacitor is provided and timely protected, and is improved the service life of high-voltage capacitor, is reduced making for whole reactive power compensator
Use cost.
Brief description of the drawings
Fig. 1 is attachment structure schematic diagram of the invention.
Brief description of the drawings：1st, key control unit；2nd, electric parameter acquisition unit；3rd, temperature detecting unit 4, output alarm and
Temperature control unit；5th, data processing module；6th, capacitor switching module；7th, infrared temperature sensor；8th, temperature forward/receive mould
Block.
Embodiment
Referring to Fig. 1, a kind of reactive power compensator with capacitor temperature detection and defencive function of the present embodiment includes：
At key control unit 1, electric parameter acquisition unit 2, temperature detecting unit 3, output alarm and temperature control unit 4, data
Manage module 5, capacitor switching module 6, infrared temperature sensor 7, temperature forwarding/receiving module 8.
Key control unit 1 is made up of data processing module 5 and capacitor switching module 6 and peripheral circuit, data processing mould
Block 5 is mainly made up of Arm7 family chips and peripheral circuit；Capacitor switching module 6 is made up of controllable silicon and combination switch, one
End is directly connected to core processing module 5, and the other end is connected by wire with multigroup high-voltage capacitor, capacitor can be realized and connect
Enter power system or cut off the operation being connected with power system.
Electric parameter acquisition unit 2 is made up of high-accuracy voltage/current sensor and A/D converter circuit, high-precision sensor
Signal acquisition terminal be connected with voltage transformer secondary side in power system, the other end passes through A/D converter circuit and the core control
Data processing module 5 in unit 1 processed is connected.
Temperature detecting unit 3 is made up of infrared temperature sensor 7 and temperature forwarding/receiving module 8.Infrared temperature sensor
7 points are multigroup, and a part is located at the top of capacitor case, and for measuring capacitor case temperature, another group is mounted remotely from electricity
In the hyperbaric chamber of container, for measuring environment temperature in cabinet, its other end of infrared temperature sensor 7 and temperature forward/receive mould
Block 8 is connected；Temperature forwarding/receiving module 8 is connected by the buses of RS 485 with key control unit 1.
Output alarm and temperature control unit 4 are made up of alarm lamp, drive circuit and heat sink；
When power factor is less than setting, the real-time acquisition system parameters of electric power signal of electric parameter acquisition unit 2 passes through
Data processing module 5 is transferred to after A/D converter circuit conversion, the capacitor bank number of input, capacitor switching module 6 needed for calculating
Instruction is sent, the capacitor of respective sets number is put into；When capacitor is run with over-saturation state for extended periods, internal temperature rise is warm
Degree detection unit 3 is monitored in real time, and infrared temperature sensor 7 is multigroup while monitoring environment temperature and capacitor case temperature in cabinet
Degree, is sent to temperature forwarding/receiving module 8, temperature forwarding/receiving module 8 passes through RS485 by temperature signal by being wirelessly transferred
Temperature data is transferred to key control unit 1 by bus；It is higher than environment temperature 8 in cabinet when detecting temperature near capacitor case
DEG C, and when environment temperature is more than 15 DEG C in cabinet, capacitor switching module 6 sends instruction, cuts off the too high capacitor bank of temperature, simultaneously
Put into another spare capacitor operation；Output alarm and temperature control unit 4 send capacitor high temperature alarm, heat sink input
Work.When the too high capacitor case temperature of temperature is reduced to setting interval, heat sink is stopped, all clear.
It should be appreciated that the application of this patent is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of this patent appended claims
Scope is protected, is repeated no more here.
Claims (4)
1. a kind of reactive power compensator with capacitor temperature detection and defencive function, includes key control unit, electric power
Parameter acquisition unit, temperature detecting unit, output alarm and temperature control unit, it is characterised in that：Key control unit it is defeated
Enter end respectively with electric parameter acquisition unit and temperature detecting unit to be connected, wherein, electric parameter acquisition unit passes through sensor
Power system is accessed, temperature detecting unit is connected by RS485 buses with key control unit, the output end of key control unit
Connect output alarm and temperature control unit；Electric parameter acquisition unit acquisition system parameters of electric power, by accessing core after AD conversion
Heart control unit, the temperature parameter of the real-time sensing capacitor top casing of temperature detecting unit, and input key control unit and enter
Row processing, key control unit according to the skin temperature of capacitor and the corresponding relation of internal temperature, it is equivalent go out capacitor internal
Temperature, so as to judge whether capacitor internal temperature exceeds predetermined value；When a certain capacitor temperature exceeds predetermined value, core
Control unit sends control signal, cuts off the capacitor, and output alarm and temperature control unit triggering carry out sound and light alarm, to electricity
Container is cooled, while another spare capacitor that puts into operation, the temperature detecting unit is by multigroup infrared temperature sensor
With temperature forwarding/receiving module composition, the thermometric end alignment capacitor top shell of a part of infrared temperature sensor, for adopting
Collect capacitor case temperature；Another part infrared temperature sensor is located remotely from the high-voltage board of capacitor, for measuring in cabinet
Environment temperature；The infrared temperature sensor other end is connected by being wirelessly transferred with temperature forwarding/receiving module；Temperature is forwarded/connect
It is connected by module by RS485 buses with key control unit, key control unit is according to capacitor case temperature and inside temperature
Corresponding relation between degree, it is equivalent go out capacitor internal temperature, at ambient temperature, high-voltage capacitance is transported in 1.2 times of rated capacities
During row, when shell maximum temperature is higher than environment temperature 8-10 DEG C, capacitor internal temperature reaches 70-90 DEG C, according to this experiment
Data, establish the skin temperature of capacitor and the corresponding relation of internal temperature.
2. reactive power compensator according to claim 1, it is characterized in that, the key control unit is by data processing module
With capacitor switching module composition；Capacitor switching module is connected by internal bus with data processing module；Data processing module root
The data sent in real time according to electric parameter acquisition unit, calculate power system reactive power parameter, when power factor does not reach stated number
During value, capacitor switching module starts, and puts into corresponding capacitor；When the added time occurred in system, the cut-out of capacitor switching module is corresponding
Capacitor, to keep power factor in specified value, while data processing module passes through RS485 buses and temperature detection list
Member is connected, and handles the temperature signal from temperature detecting unit, the skin temperature and environment temperature of real-time sensing capacitor.
3. reactive power compensator according to claim 1 or 2, it is characterized in that, the electric parameter acquisition unit is by sensing
Device and A/D converter circuit composition, collecting sensor signal end are connected with voltage transformer secondary side in power system, and the other end leads to
A/D converter circuit is crossed with the data processing module in key control unit to be connected.
4. reactive power compensator according to claim 1 or 2, it is characterized in that, the output alarm and temperature control unit
It is made up of alarm lamp, drive circuit, heat sink, drive circuit one end is connected with key control unit, and the other end passes through
Shielding line is connected with heat sink.
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| CN201510908142.2A CN105353792B (en) | 2015-12-07 | 2015-12-07 | A kind of reactive power compensator with capacitor temperature detection and defencive function |
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| CN201510908142.2A CN105353792B (en) | 2015-12-07 | 2015-12-07 | A kind of reactive power compensator with capacitor temperature detection and defencive function |
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| CN105353792A CN105353792A (en) | 2016-02-24 |
| CN105353792B true CN105353792B (en) | 2017-07-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372513B (en) * | 2014-08-26 | 2019-03-15 | 上海思源电力电容器有限公司 | A kind of intelligent thermoregulating analog capacitor and its implementation |
| CN108110733A (en) * | 2016-11-25 | 2018-06-01 | 上海千槐电气有限公司 | The temperature protective device of low voltage power capacitor |
| CN108565871A (en) * | 2018-02-01 | 2018-09-21 | 合肥联信电源有限公司 | A kind of reactive compensation cabinet with remote monitoring function |
| CN110071511A (en) * | 2019-05-09 | 2019-07-30 | 浙江朗松智能电力设备有限公司 | A kind of reactive compensation controlling device and capacitor switching method |
| CN110808574B (en) * | 2019-10-08 | 2022-09-06 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
| CN112486223B (en) * | 2020-12-10 | 2022-02-08 | 浙江天正电气股份有限公司 | Method and device for controlling temperature of capacitor |
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