CN202798001U - Low voltage capacitor device and reactive power compensation control system provided with low voltage capacitor device - Google Patents
Low voltage capacitor device and reactive power compensation control system provided with low voltage capacitor device Download PDFInfo
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- CN202798001U CN202798001U CN201220490383.1U CN201220490383U CN202798001U CN 202798001 U CN202798001 U CN 202798001U CN 201220490383 U CN201220490383 U CN 201220490383U CN 202798001 U CN202798001 U CN 202798001U
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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 utility model discloses a low voltage capacitor device capable of detecting capacitor current, which can check current input capacity of a capacitor according to obtained capacitive current and system voltage, simultaneously also can obtain current capacitor capacity according to detected current and the system voltage. Simultaneously, when having abnormal current (such as overcurrent), the low voltage capacitor device capable of detecting the capacitor current can do correspondingly protection operation, thereby being capable of knowing field state of the capacitor in real time to conveniently maintain, and being also capable of effectively preventing the capacitor from being damaged because of problems such as overcurrent. The utility model further discloses a reactive power compensation control system provided with a low voltage capacitor device.
Description
Technical field
The utility model is about the supply network control field, more particular words it, the utility model is about the novel secondary capacitor equipment in a kind of mains supply system, and further about reactive compensation control system with this type of secondary capacitor and the method for the control of reactive power compensating.
Background technology
At present, all be to compensate switching according to condenser capacity for the reactive-load compensation equipment of mains supply, whether the capacity of capacitor all is to set in advance, as for connecing in the electric power system established actual capacitance and then have no way of finding out about it at all.And rated capacity and the actual capacity of electric capacity still have difference, and capacitor is because its applying working condition and time, the capital causes capacity attenuation, even producing resonance with system, the overcurrent of resonance can endanger capacitor safe, so the reactive power compensation effect is with regard to decrease.
In this case, need a kind of equipment of research and development, existing electric power system is made improvement, to avoid the generation of this problem.
The utility model content
The utility model is intended to solve the defective that prior art exists, provide a kind of can Detection capacitance device electric current secondary capacitor, can check the current input capacity of capacitor according to the capacitance current that obtains and system voltage.Simultaneously; also can be according to recording electric current and system voltage; draw current condenser capacity; (for example overcurrent) protects operation accordingly during simultaneously if there is abnormal current; so both can understand in real time on-the-spot capacitor status so that safeguard, and can effectively avoid again capacitor to damage because of problems such as overcurrent.
In order to realize above-mentioned technical purpose, one of design of the present utility model connects in the prime of secondary capacitor and to establish capacitor CT circuit, and condenser current is detected.
In order to realize above-mentioned technical purpose, two of design of the present utility model, design a kind of reactive power compensation electric power supply control system with this type of secondary capacitor, described capacitor CT circuit is connected between capacitor and the fling-cut switch equipment, and realizes control to switch by a control appliance.
In order to realize above-mentioned technical purpose, three of design of the present utility model, design the reactive power compensation electric power supply control system that a kind of current sensor to capacitor CT circuit carries out dividing potential drop and sampling, and can process and display operation to these signals, the abnormal conditions that may occur with effective control.
Technique effect of the present utility model is realized by the following technical programs:
Technical scheme one: a kind of secondary capacitor equipment, comprise the secondary capacitor that three-phase sets up separately, the prime of described secondary capacitor is equipped with capacitor CT circuit.
Technical scheme two: a kind of reactive power compensation electric power supply control system, it comprises and connects circuit breaker, fling-cut switch and the controller of establishing three phase network zero line and live wire, and further comprise foregoing secondary capacitor equipment, wherein said circuit breaker is electrically connected to respectively fling-cut switch and controller, described fling-cut switch is electrically connected to secondary capacitor, the further access controller of described secondary capacitor, described controller picks out to fling-cut switch and to it and is controlled.
In preferred embodiment of the present utility model, described capacitor CT circuit further is arranged between fling-cut switch and the secondary capacitor, and further access controller.
In preferred embodiment of the present utility model, described controller comprises process and be connected to the treatment circuit of fling-cut switch from the signal of capacitor CT circuit.
Technical scheme three: a kind of reactive power compensation electric power supply control system, it comprises foregoing secondary capacitor equipment, and further comprise the sampling modulate circuit, adc circuit and processor, described capacitor CT which couple is connected in the sampling modulate circuit, and described sampling modulate circuit, adc circuit are electrically connected successively with processor.
In preferred embodiment of the present utility model, described sampling modulate circuit further comprises current sampling circuit and voltage sampling circuit, and electric current and voltage signal that described current sampling circuit and voltage sampling circuit draw sampling respectively transfer to adc circuit.
In preferred embodiment of the present utility model, the reactive power compensation electric power supply control system further comprises a display that is used for showing secondary capacitor electric current and status data, and described display is electrically connected on processor.
In preferred embodiment of the present utility model, the reactive power compensation electric power supply control system further comprises a memory that is used for store status data and parameter preset, and described memory is electrically connected on processor.
The utility model compared with prior art, in the secondary capacitor of electric power system, installed the CT circuit additional with Detection capacitance device electric current, can check the current input capacity of capacitor according to the capacitance current that obtains and system voltage, fundamentally solve the electric current controllability of capacitor, and realized the whole control association of electric power system by improved electric power system.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the first embodiment schematic diagram of the utility model reactive power compensation electric power supply control system;
Fig. 2 is the second embodiment schematic diagram of the utility model reactive power compensation electric power supply control system.
Embodiment
Embodiment one:
With reference to Fig. 1, the utility model secondary capacitor equipment comprises the secondary capacitor 4 that A, B, C three-phase set up separately, and the prime of these secondary capacitors 4 is equipped with capacitor CT circuit 5.
After secondary capacitor 4 added capacitor CT circuit 5, electric current when can the Detection capacitance device dropping into was understood the condenser capacity attenuation, can accomplish timely replacing, guaranteed that platform district reactive compensation capacity is full-amount.
Embodiment two:
With reference to Fig. 1, the utility model reactive power compensation electric power supply control system, it comprises and connects circuit breaker 1, fling-cut switch 2 and the controller 3 of establishing three phase network zero line and live wire, and further comprise foregoing secondary capacitor equipment, wherein circuit breaker 1 is electrically connected to respectively fling-cut switch 2 and controller 3, fling-cut switch 2 is electrically connected to secondary capacitor 4, secondary capacitor 4 further access controllers 3, and controller 3 picks out to fling-cut switch 2 and to it and is controlled.
The basic principle of reactive power compensation is: the power of electrical network output comprises two parts, the one, and active power: directly consume electric energy, electric energy is changed into mechanical energy, heat energy, chemical energy or acoustic energy etc., utilize these to do work, this part power is called active power; The 2nd, reactive power: do not consume electric energy, just electric energy is converted to the energy of another kind of form, this essential condition that can do work as electric equipment, and this can be to carry out the periodicity conversion with electric energy in electrical network, this part power is called reactive power, set up the electric energy that magnetic field takies such as electromagnetic component, capacitor is set up the shared electric energy of electric field, when electric current does work in inductance element, electric current lags behind voltage 90 degree, and electric current is when doing work in capacity cell, electric current leading voltage 90 degree, in same circuit, inductive current and capacitance current opposite direction, mutual deviation 180 degree are installed capacity cell proportionally in the electromagnetic component circuit, both electric currents are cancelled out each other, the vector of electric current and the angle between the voltage vector are dwindled.
In preferred embodiment of the present utility model, described capacitor CT circuit 5 further is arranged between fling-cut switch 2 and the secondary capacitor 4, and further access controller 3.
In preferred embodiment of the present utility model, described controller comprises process and be connected to the treatment circuit of fling-cut switch 2 from the signal of capacitor CT circuit 5, described treatment circuit can be a single-chip microcomputer, and at sampling apparatus of single-chip microcomputer prime installation, current value to capacitor is sampled, and processes to judge whether to occur abnormal conditions further to judge by the data of single-chip microcomputer.
Embodiment three
With reference to Fig. 2, the utility model reactive power compensation electric power supply control system, it comprises foregoing secondary capacitor equipment, and further comprise the sampling modulate circuit 6, adc circuit 7 and processor 8, described capacitor CT circuit 5 is of coupled connections in sampling modulate circuit 6, and described sampling modulate circuit 6, adc circuit 7 are electrically connected successively with processor 8.
In preferred embodiment of the present utility model, described sampling modulate circuit 6 further comprises current sampling circuit 61 and voltage sampling circuit 62, and electric current and voltage signal that described current sampling circuit 61 and voltage sampling circuit 62 draw sampling respectively transfer to adc circuit 7.
In preferred embodiment of the present utility model, described sampling modulate circuit 6 can further be of coupled connections with processor 8, but described adc circuit 7 Coupling Design in processor 8, processor 8 can be a process chip MCU or DSP.
In preferred embodiment of the present utility model, the reactive power compensation electric power supply control system further comprises a display 9 that is used for showing secondary capacitor 4 electric currents and status data, and described display 9 is electrically connected on processor 8.
In preferred embodiment of the present utility model, the reactive power compensation electric power supply control system further comprises a memory 10 that is used for store status data and parameter preset, and described memory 10 is electrically connected on processor 8.
In preferred embodiment of the present utility model, the reactive power compensation electric power supply control system further comprises a communication terminal that is electrically connected with processor 8, by this communication terminal, processor 8 can be uploaded to the status data of capacitor a power grid control terminal management backstage, can effectively monitor and gets rid of unusual electric network data.
Simultaneously, in preferred embodiment of the present utility model, further comprise a kind of power-less compensation control method, described method comprises the steps:
1) obtains the electric current of secondary capacitor 4 by a capacitor CT circuit 5;
2) current sampling circuit 61 by sampling modulate circuit 6 obtains current signal, by the voltage sampling circuit 62 acquisition voltage signals of sampling modulate circuit 6;
3) current signal and the voltage signal that obtains transferred to respectively adc circuit 7;
4) obtain current signal value U and voltage signal values I by adc circuit 7;
5) obtain described current signal value U and voltage signal values I by a processor 8 and carry out the data processing;
6) the predetermined current value of extracting in the memory 10 by described processor 8, and described current signal value I and described predetermined current value calculated and compare, fling-cut switch 2 further controlled according to comparison value;
7) by processor 8 current signal value U and voltage signal values I are carried out integral operation and draw the capacitor power value;
8) the default power range values of extracting in the memory 10 by described processor 8, and described capacitor power value and described default power bracket calculated and compare, circuit breaker 1 further controlled according to comparison value.
Behind capacitor CT circuit 5 output current signals, be converted to voltage signal through sampling resistor, send into adc circuit chip 7, carry out last sampling by MCU 8.The conventional current Displaying Meter as long as input signal meets its input range, and can arrange into the CT no-load voltage ratio of capacitor CT, namely can show at display 9 current information and the state information of secondary capacitor 4.
Being embodiment of the present utility model only below, is not to be to restriction of the present utility model, should understand, and the modifications and variations that all are done based on the utility model all should be covered by in the concrete technical scheme of the present utility model.
Claims (8)
1. a secondary capacitor equipment comprises the secondary capacitor (4) that three-phase sets up separately, and it is characterized in that: the prime of described secondary capacitor (4) is equipped with capacitor CT circuit (5).
2. reactive power compensation electric power supply control system, it comprises and connects circuit breaker (1), fling-cut switch (2) and the controller (3) of establishing three phase network zero line and live wire, it is characterized in that: further comprise secondary capacitor equipment as claimed in claim 1, wherein said circuit breaker (1) is electrically connected to respectively fling-cut switch (2) and controller (3), described fling-cut switch (2) is electrically connected to secondary capacitor (4), described secondary capacitor (4) is access controller (3) further, and described controller (3) picks out to fling-cut switch (2) and to it and controlled.
3. reactive power compensation electric power supply control system as claimed in claim 2, it is characterized in that: described capacitor CT circuit (5) further is arranged between fling-cut switch (2) and the secondary capacitor (4), and further access controller (3).
4. reactive power compensation electric power supply control system as claimed in claim 2, it is characterized in that: described controller comprises process and be connected to the treatment circuit of fling-cut switch (2) from the signal of capacitor CT circuit (5).
5. reactive power compensation electric power supply control system, it is characterized in that: it comprises secondary capacitor equipment as claimed in claim 1, and further comprise the sampling modulate circuit (6), adc circuit (7) and processor (8), described capacitor CT circuit (5) is of coupled connections in sampling modulate circuit (6), and described sampling modulate circuit (6), adc circuit (7) are electrically connected successively with processor (8).
6. reactive power compensation electric power supply control system as claimed in claim 5, it is characterized in that: described sampling modulate circuit (6) further comprises current sampling circuit (61) and voltage sampling circuit (62), and electric current and voltage signal that described current sampling circuit (61) and voltage sampling circuit (62) draw sampling respectively transfer to adc circuit (7).
7. reactive power compensation electric power supply control system as claimed in claim 4 is characterized in that: further comprise a display (9) that is used for showing secondary capacitor (4) electric current and status data, described display (9) is electrically connected on processor (8).
8. reactive power compensation electric power supply control system as claimed in claim 4 is characterized in that: further comprise a memory (10) that is used for store status data and parameter preset, described memory (10) is electrically connected on processor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220490383.1U CN202798001U (en) | 2012-09-24 | 2012-09-24 | Low voltage capacitor device and reactive power compensation control system provided with low voltage capacitor device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220490383.1U CN202798001U (en) | 2012-09-24 | 2012-09-24 | Low voltage capacitor device and reactive power compensation control system provided with low voltage capacitor device |
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| CN202798001U true CN202798001U (en) | 2013-03-13 |
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| CN201220490383.1U Expired - Lifetime CN202798001U (en) | 2012-09-24 | 2012-09-24 | Low voltage capacitor device and reactive power compensation control system provided with low voltage capacitor device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904260A (en) * | 2012-09-24 | 2013-01-30 | 长兴县供电局 | Low-voltage capacitor equipment, reactive compensation control system and reactive compensation control method |
-
2012
- 2012-09-24 CN CN201220490383.1U patent/CN202798001U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904260A (en) * | 2012-09-24 | 2013-01-30 | 长兴县供电局 | Low-voltage capacitor equipment, reactive compensation control system and reactive compensation control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 313000, Jinling Road 75, pheasant Town, Huzhou, Zhejiang, Changxing County Patentee after: CHANGXING COUNTY POWER SUPPLY BUREAU Patentee after: ZHEJIANG HUAYUN INFORMATION TECHNOLOGY Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 313000, Jinling Road 75, pheasant Town, Huzhou, Zhejiang, Changxing County Patentee before: Changxing County Power Supply Bureau Patentee before: ZHEJIANG CREAWAY AUTOMATION ENGINEERING Co.,Ltd. Patentee before: State Grid Corporation of China |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |