CN202737474U - Three-phase intelligent reactive compensation detection device - Google Patents
Three-phase intelligent reactive compensation detection device Download PDFInfo
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- CN202737474U CN202737474U CN 201220395628 CN201220395628U CN202737474U CN 202737474 U CN202737474 U CN 202737474U CN 201220395628 CN201220395628 CN 201220395628 CN 201220395628 U CN201220395628 U CN 201220395628U CN 202737474 U CN202737474 U CN 202737474U
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- checkout gear
- intelligent reactive
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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 relates to a three-phase intelligent reactive compensation detection device, which comprises a single chip microcomputer, a sampling circuit module, a feedback circuit module, a switching device, a silicon controlled rectifier and magnetic latching relay assembly and a display driving module, wherein the modules and the devices are connected to a panel and are respectively provided with a signal input interface and a signal output interface. A device with capacitive load and a device with inductive load are connected on a same circuit and energy is exchanged between the two loads so that reactive power absorbed by the inductive load can be compensated from reactive power output by the capacitive load. Then, sampling data analysis is carried out on reactive power, power factors and voltage in a power grid by using the method of single-phase active power measurement according to a symmetrical three-phase voltage positive phase diagram and a three-phase four-wire connection mode. The three-phase intelligent reactive compensation detection device of the utility model is simple in structure, easy in circuit connection and safe and reliable.
Description
Technical field
The utility model relates to three-phase and four-line reactive power compensation technology field, is specifically related to a kind of three-phase intelligent reactive power compensation checkout gear.
Background technology
Present reactive-load compensation equipment mainly contains synchronous compensator, switch on-off fixed capacity, static reacance generator (SVG) and this four class of intelligent powerless compensation checkout gear.Wherein, the response speed of synchronous compensator is slow, and noise is large, and loss is large, and technological obsolescence belongs to filtering technique; The response compensation way of switch on-off fixed capacity is slow, continuous controlled ability; Although SVG has technical limitation at present, belong to the minority demonstration project stage, but SVG is a kind of more advanced novel static var compensator, it is the important component part of flexible flexible AC transmitting system (FACTS) technology and customization electric power (CP) technology, represented the developing direction of modern reactive power compensation device, but its arrangement and maintenance cost are relatively very high.
And that the intelligent powerless compensation checkout gear has remedied switch on-off fixed capacity response compensation way is slow, and the problem of having improved controlled ability, is relatively practical at present technology, is widely used in the power transmission and distribution electric power system.
Publication number is the Chinese utility model patent of CN201430448Y, a kind of intelligent powerless compensation device is disclosed, it comprises outdoor equipment box, be provided with out of doors intelligent low-pressure capacitor and distribution transforming comprehensive control terminal in the equipment box, intelligent low-pressure capacitor and distribution transforming comprehensive control terminal interconnect, be connected with the CT sample circuit one time in distribution transforming comprehensive control terminal and three-phase delivery circuit, be connected with the second CT sampling circuit between CT sample circuit and intelligent low-pressure capacitor, the output of intelligent low-pressure capacitor is connected with the three-phase delivery circuit.The intelligent powerless compensation device of this utility model possesses distribution transformer monitoring and the control of reactive power compensating, but its circuit connects complexity, and parts are many, have the problem of reactive power compensation detection and security of operation.
The utility model content
In order to overcome the above problems, the utility model provides a kind of three-phase intelligent reactive power compensation checkout gear, the mode of connection by balanced three-phase voltage positive sequence phase sequence figure and three-phase and four-line, use the mode of single-phase measurement active power, the reactive power in the electrical network, power factor (PF), voltage are carried out the sampled data analysis.
To achieve these goals, the utility model adopts following technical scheme.
A kind of three-phase intelligent reactive power compensation checkout gear is connected in the power supply-distribution system, and it comprises single-chip microcomputer, sample circuit module, feedback circuit module, switching device, controllable silicon and magnetic latching relay assembly, driver module; Each module and device are interconnected on the panel, and are provided with signal input interface and signal output interface.
Single outside mode of connection is by in the pure idle mode connecting system.
The switching device of described reactive-load compensation capacitor adopts Intelligent combination switch.
, comes the C/K parameter value reactive loss of comparison current system by being set; adopt the operation conditions of Single-chip Controlling switching and intelligent monitoring controllable silicon, magnetic latching relay and input power and load, carry out the protection of voltage failure phase shortage, supply voltage phase shortage, Self-fault diagnosis and power failure.
During the power supply of system voltage phase shortage, the switch refusal is closed, carries out the protection of voltage failure phase shortage.
During the power supply of working power phase shortage, the switch refusal is closed, carries out the protection of supply voltage phase shortage.
The running status of system's automatic monitoring controllable silicon, magnetic latching relay is carried out the protection of Self-fault diagnosis.
Circuit runs into unexpected power failure after connecting, and automatic trip disconnects, and carries out power-failure protecting.
Line conduction moment is triggered by silicon control zero-cross, after the time-delay by magnetic latching relay adhesive conducting.
Adopt input signal and throw-cut device for capacitor sampling photoelectricity isolation method.
Described feedback circuit is by controllable silicon, magnetic latching relay control.
Described C/K parameter value adopts the potentiometer setting.
The utility model intelligent powerless compensation checkout gear can be divided into centralized compensation, grouping compensation and local compensation by different combinations.Centralized compensation is namely installed Shunt Capacitor Unit in the high and low voltage electric distribution circuit; The grouping compensation is namely installed parallel capacitor in distribution transformer low-pressure side and user workshop switchboard; The single motor local compensation is namely installed shunt capacitor at the single motor place.Install reactive-load compensation equipment additional, not only can make power consumption little, power factor improves, fully the potentiality of excavating equipment transmission power.Reactive power compensation on the spot has overcome the shortcoming of centralized compensation and grouping compensation, is a kind of comparatively perfect compensation way.
The device with capacitive load and inductive load and be connected in same circuit, when capacitive load released energy, inductive load absorbed energy; And inductive load is when releasing energy, capacitive load is but absorbing energy, energy is intercoursed between two kinds of loads. like this, the reactive power that inductive load absorbs can be compensated in the reactive power by capacitive load output, again according to the mode of connection of balanced three-phase voltage positive sequence phase sequence figure and three-phase and four-line, use the mode of single-phase measurement active power, the reactive power in the electrical network, power factor (PF), voltage are carried out the sampled data analysis, analysis result shows by LED.
Three-phase intelligent reactive power compensation checkout gear of the present utility model, simple in structure, connection is easy, and is safe and reliable.
Description of drawings
Fig. 1 is the structural representation according to a kind of three-phase intelligent reactive power compensation checkout gear of the present utility model.
Fig. 2 is the balanced three-phase voltage positive sequence vector schematic diagram according to a kind of three-phase intelligent reactive power compensation checkout gear of the present utility model.
Fig. 3 is the reactive power compensation detection schematic diagram according to a kind of three-phase intelligent reactive power compensation checkout gear of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Electric load in the electrical network such as motor, transformer etc., major part belongs to inductive load, and needing in running provides corresponding reactive power to these equipment.In electrical network, install after the reactive-load compensation equipment such as shunt capacitor, the reactive power that can provide inductive load to consume, reduced the reactive power that electric network source provides, carried by circuit to inductive load, owing to having reduced reactive power flowing in electrical network, therefore can reduce the electric energy loss because carrying reactive power to cause of circuit and transformer.
Compensating power can increase the proportionality constant of active power in the electrical network.Reduce the design capacity of generation and supply electric equipment, reduce cost for example when power-factor cos Φ=0.8 is increased to cos Φ=0.95, fills the 1Kvar capacitor and can save place capacity 0.52KW; Otherwise, increase 0.52KW to existing equipment, be equivalent to increase the generation and supply electric equipment capacity.Therefore, to newly-built, reconstruction project, reactive power compensation should be taken into full account, just design capacity can be reduced, thus reduce cost.
Reduce line loss, by formula Δ Ρ %=(1-cos Φ/cos Φ) * 100% draw the power factor after for compensation of cos Φ wherein, cos Φ is the front power factor of compensation, cos Φ then〉cos Φ, so after improving power factor, line loss rate has also descended, reduce design capacity, reduce cost increases the conveying ratio of active power in the electrical network, and reduces the economic benefit that line loss all directly determined and affected power supply enterprise.
So power factor is the important indicator of examination economic benefit, planning, to implement reactive power compensation imperative.When determining reactive compensation capacity, should note following 2 points: 1. will avoid overcompensation in the light hours, send the idle power loss that causes to increase, also be uneconomic.2. power factor is higher, and the effect of every kilovolt of compensation capacity minimizing loss will diminish, and generally, it is exactly reasonable compensation that power factor is brought up to 0.95.With regard to " centralized compensation, grouping compensation and local compensation " these three kinds of compensation ways, reactive power compensation on the spot has overcome the shortcoming of centralized compensation and grouping compensation, a kind of comparatively perfect compensation way: because of capacitor directly in parallel with motor, drop into simultaneously or stop using, can make and idlely not flow backwards, guarantee that the factor is lead to consumer's meritorous service is in hysteretic state all the time, both be conducive to the user, also be conducive to electrical network; Also be conducive to reduce the motor starting electric current, reduce the spark of contactor, improve the reliability of control apparatus work, prolong the useful life of motor and control appliance.
As depicted in figs. 1 and 2, three-phase intelligent reactive power compensation checkout gear of the present utility model comprises single-chip microcomputer, sample circuit module, feedback circuit module, switching device, controllable silicon and magnetic latching relay assembly, driver module; Each module and device are interconnected on the panel, and are provided with signal input interface and signal output interface.
The device with capacitive load and inductive load and be connected in same circuit, when capacitive load released energy, inductive load absorbed energy; And inductive load is when releasing energy, and capacitive load is but absorbing energy, and energy is intercoursed between two kinds of loads.Like this, the reactive power that inductive load absorbs can be compensated in the reactive power by capacitive load output, again according to the mode of connection of balanced three-phase voltage positive sequence phase sequence figure and three-phase and four-line, use the mode of single-phase measurement active power, reactive power in the electrical network, power factor (PF), voltage are carried out the sampled data analysis, and analysis result shows by LED.
Particularly, according to balanced three-phase voltage positive sequence phase sequence figure and the special mode of connection of three-phase and four-line, summarizes goes out, and uses the meritorious mode of individual event metering, and the reactive power in the electrical network, power factor (PF), voltage are carried out the sampled data analysis.
As shown in Figure 3, single outside mode of connection is by in the pure idle mode connecting system, and when meritorious in the system, the expression system has reactive power to exist.By the C/K value is set, relatively whether the reactive loss of current system exceeds allowed band, then adopts the operation conditions of Single-chip Controlling switching and intelligent monitoring controllable silicon, magnetic latching relay and input power and load, thereby possesses perfect defencive function.
The voltage failure open-phase protection: when the system voltage lacuna was powered, the switch refusal was closed;
The supply voltage open-phase protection: when the working power phase shortage was powered, the switch refusal was closed;
The Self-fault diagnosis protection: the running status of system's automatic monitoring controllable silicon, magnetic latching relay, if it breaks down, then refuse closed or automatically move back to throw to disconnect;
Power-failure protecting: meet after connecting when having a power failure suddenly, automatic trip disconnects.
Because conducting moment is to be triggered by silicon control zero-cross, by magnetic latching relay adhesive conducting, and can not produce harmonic wave during relay work after the time-delay, electrical network is exerted an influence.
Adopted magnetic latching relay, control device is only in switching action moment power consumption, and at ordinary times not power consumption, and because the contact resistance of magnetic latching relay is little, thereby do not generate heat so just need not outer radiation fin or fan, has reduced cost.Thoroughly avoid silicon controlled to burn phenomenon, also other electrical equipment with the machine operation has not been worked the mischief simultaneously, really reached purpose energy-conservation, consumption reduction.Input signal and throw-cut device for capacitor sampling photoelectricity isolation method, antijamming capability is strong, and is safe and reliable.
Wherein, the C/K value can be set as follows:
C/K=Ic/K
The rated current of Ic=capacitor
K=(primary current of CT)/5
For example:
CT?=?150/0.25A?；K?=?150/5?=?30
Capacitor: 25Kvar/440V
Ic?=?25000/1.73*440?=?32.8A；?C/K?=?Ic/K?=?32.8/30?=?1.1。
The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every any simple modification, equivalent variations and modification of above execution mode being done according to the technical solution of the utility model all still belongs in the scope of technical solutions of the utility model.
Claims (12)
1. a three-phase intelligent reactive power compensation checkout gear is connected in the power supply-distribution system, it is characterized in that: it comprises single-chip microcomputer, sample circuit module, feedback circuit module, switching device, controllable silicon and magnetic latching relay assembly, driver module; Each module and device are interconnected on the panel, and are provided with signal input interface and signal output interface.
2. three-phase intelligent reactive power compensation checkout gear as claimed in claim 1 is characterized in that: single outside mode of connection is by in the pure idle mode connecting system.
3. three-phase intelligent reactive power compensation checkout gear as claimed in claim 1 is characterized in that: described switching device employing Intelligent combination switch.
4. three-phase intelligent reactive power compensation checkout gear as claimed in claim 1; it is characterized in that: the reactive loss that the C/K parameter value is determined current system is set; adopt the operation conditions of Single-chip Controlling switching and intelligent monitoring controllable silicon, magnetic latching relay and input power and load, carry out the protection of voltage failure phase shortage, supply voltage phase shortage, Self-fault diagnosis and power failure.
5. three-phase intelligent reactive power compensation checkout gear as claimed in claim 4 is characterized in that: during the power supply of system voltage phase shortage, the switch refusal is closed, carries out the protection of voltage failure phase shortage.
6. three-phase intelligent reactive power compensation checkout gear as claimed in claim 4 is characterized in that: during the power supply of working power phase shortage, the switch refusal is closed, carries out the protection of supply voltage phase shortage.
7. three-phase intelligent reactive power compensation checkout gear as claimed in claim 4 is characterized in that: the running status of system's automatic monitoring controllable silicon, magnetic latching relay, carry out the protection of Self-fault diagnosis.
8. three-phase intelligent reactive power compensation checkout gear as claimed in claim 4 is characterized in that: circuit runs into unexpected power failure after connecting, and automatic trip disconnects, and carries out power-failure protecting.
9. three-phase intelligent reactive power compensation checkout gear as claimed in claim 4 is characterized in that: line conduction moment is triggered by silicon control zero-cross, after the time-delay by magnetic latching relay adhesive conducting.
10. three-phase intelligent reactive power compensation checkout gear as claimed in claim 1 is characterized in that: adopt input signal and throw-cut device for capacitor sampling photoelectricity isolation method.
11. three-phase intelligent reactive power compensation checkout gear as claimed in claim 1 is characterized in that: described feedback circuit is by controllable silicon, magnetic latching relay control.
12. three-phase intelligent reactive power compensation checkout gear as claimed in claim 4 is characterized in that: described C/K parameter value adopts the potentiometer setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220395628 CN202737474U (en) | 2012-08-10 | 2012-08-10 | Three-phase intelligent reactive compensation detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220395628 CN202737474U (en) | 2012-08-10 | 2012-08-10 | Three-phase intelligent reactive compensation detection device |
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| CN202737474U true CN202737474U (en) | 2013-02-13 |
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| CN 201220395628 Expired - Lifetime CN202737474U (en) | 2012-08-10 | 2012-08-10 | Three-phase intelligent reactive compensation detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979102A (en) * | 2016-10-24 | 2018-05-01 | 浙江水利水电学院 | Loading interfaces power supply phase automatic clearing apparatus and its control method |
| CN108023357A (en) * | 2016-11-20 | 2018-05-11 | 国网江西省电力公司赣东北供电分公司 | A kind of new reactive power automatic compensation device |
| CN113315138A (en) * | 2021-04-30 | 2021-08-27 | 徐州大工电子科技有限公司 | Method and system for improving efficiency of power converter |
-
2012
- 2012-08-10 CN CN 201220395628 patent/CN202737474U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979102A (en) * | 2016-10-24 | 2018-05-01 | 浙江水利水电学院 | Loading interfaces power supply phase automatic clearing apparatus and its control method |
| CN108023357A (en) * | 2016-11-20 | 2018-05-11 | 国网江西省电力公司赣东北供电分公司 | A kind of new reactive power automatic compensation device |
| CN113315138A (en) * | 2021-04-30 | 2021-08-27 | 徐州大工电子科技有限公司 | Method and system for improving efficiency of power converter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 314500 No. 8, Kangding Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang Patentee after: ZHEJIANG YONGTAILONG ELECTRONIC Co.,Ltd. Address before: 313000 No. 8, Kangding Road, Tongxiang Economic Development Zone, Huzhou, Zhejiang Patentee before: ZHEJIANG YONGTAILONG ELECTRONIC Co.,Ltd. |
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| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG YONGTAILONG ELECTRONIC CO., LTD. Free format text: FORMER NAME: ZHEJIANG YONGTAILONG ELECTRONICS CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: Jiaxing City, Zhejiang province 314500 Tongxiang City Fengming street Tong Sheng Road No. 320 Patentee after: ZHEJIANG YONGTAILONG ELECTRONIC Co.,Ltd. Address before: 314500 No. 8, Kangding Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang Patentee before: ZHEJIANG YONGTAILONG ELECTRONIC Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |