CN201061152Y - Power condenser on/off switch - Google Patents
Power condenser on/off switch Download PDFInfo
- Publication number
- CN201061152Y CN201061152Y CNU2007201694886U CN200720169488U CN201061152Y CN 201061152 Y CN201061152 Y CN 201061152Y CN U2007201694886 U CNU2007201694886 U CN U2007201694886U CN 200720169488 U CN200720169488 U CN 200720169488U CN 201061152 Y CN201061152 Y CN 201061152Y
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- Prior art keywords
- circuit
- group
- thyristor
- electric capacity
- contactor
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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 provides a power capacitor make-break switch, comprising a make-break circuit and a control circuit. The utility model is characterized in that the make-break circuit comprises a group of thyristors connected with any two phases of the three-phase power and at least two groups of capacitors connected with the other phase of the three-phase power; each group of capacitors are respectively connected with a group of main contactors and a group of auxiliary contactors; the auxiliary contactors connected with each group of capacitors are connected in series with the thyrisors and then connected in parallel with the main contactors connected with the group of the capacitors; the control circuit comprises a microprocessor circuit, a photoelectric coupling input circuit and a drive circuit; the microprocessor circuit is used to monitor system operation status and generate a sequence signal of the make-break circuit according to an external instruction; the photoelectric coupling input circuit is used for photoelectric coupling input of the external make-break instruction; the drive circuit is used to drive make-break operation of each group of capacitor according to the sequence signal. The utility model has the advantages of controlling a plurality of groups of capacitors using a group of thyrisors, effectively reducing relative size of the switch, improving utilization ratio of the thyristors and reducing the switch cost.
Description
Technical field
The utility model relates to electric power control field, particularly a kind of Power-capacitance hurl-slices switch.
Background technology
When power factor (PF) was not equal to 1, the appearance of reactive power caused the power loss of circuit and power supply unit to increase, and The parallel power condenser is carried out reactive power compensation on the circuit of therefore being everlasting, and improves power factor (PF).At present, the following form of the many employings of low-voltage capacitance fling-cut switch that is used for reactive power compensation device: (one) is directly with A.C. contactor control power capacitor switching.Its shortcoming is that switching shoves greatly, has switching overvoltage, has electric arc to produce poor reliability.(2) use thyristor control power capacitor switching.Its shortcoming is an operation power consumption height, easily heating, and long-time running need add radiator.(3) utilize thyristor and A.C. contactor to control the power capacitor switching jointly.The advantage that its existing thuristor throw-in and throw-off no-flashy-flow is thrown, the little advantage of power consumption when the contactor long-time running is arranged again.But present this switch all is to take a switch to control the form of one group of power capacitor.Fig. 1 is the fling-cut switch circuit diagram of the third form, as shown in the figure, because one group of thyristor cooperates the switching of controlling one group of power capacitor with a winding tentaculum, has that the thyristor utilance is low, cost is high, capacity is little, bulky defective.
Summary of the invention
The purpose of the utility model one embodiment is to provide a kind of Power-capacitance hurl-slices switch, and the fling-cut switch of this embodiment utilizes one group of thyristor, cooperates many group main contactors and secondary contactor, controls the switching of many group power capacitors.
The utility model one embodiment provides a kind of power capacitor fling-cut switch, comprise switching circuit and control circuit, described switching circuit comprises: the one group of thyristor that is electrically connected with any two of three-phase electricity, another at least two group electric capacity that are electrically connected with described three-phase electricity, every group of electric capacity connects one group of main contactor and one group of secondary contactor respectively, connects the secondary contactor and described thyristor series connection back and the main contactor parallel connection that is connected this group electric capacity of every group of electric capacity; Described control circuit comprises: microcontroller circuit is used for the monitoring system operation conditions, and produces the clock signal of described switching circuit according to external command; Photoelectricity coupling input circuit is used for the photoelectricity coupling input of outside switching order; Drive circuit connects described microcontroller circuit and described switching circuit, is used for driving according to described clock signal the switching operation of described every group of electric capacity.
Described clock signal comprises: secondary contactor clock signal, main contactor clock signal and thyristor clock signal.
Described drive circuit further comprises: thyristor gating circuit, connect described microcontroller circuit and described thyristor, and be used for controlling the connection and the disconnection of described thyristor according to described thyristor clock signal; Relay drive circuit connects described microcontroller circuit and all main contactors and secondary contactor, is used for controlling being connected and disconnection of every group of main contactor and secondary contactor according to described main contactor clock signal with described secondary contactor clock signal.
Described control circuit also comprises the open-phase protection circuit that connects described microcontroller circuit.Be used to detect three-phase electricity and phase shortage whether occurs, if phase shortage, the microprocessor output of reporting to the police, the electric capacity that excision has dropped into, and forbid that electric capacity drops into again.
Described control circuit also comprises the transistors breakdown testing circuit that connects described microcontroller circuit and described thyristor.Be used for the state of thyristor is monitored, switch occur to be punctured or during not conducting phenomenon at thyristor, the microprocessor output of reporting to the police, and forbid that electric capacity drops into again.
Described thyristor is full control thyristor or half control thyristor.
Described every group of electric capacity is corner connection electric capacity.
The fling-cut switch of the utility model embodiment adopts one group of thyristor to cooperate many group main contactors and secondary contactor to control the switching of many group power capacitors.In the process of electric capacity connection and disconnection, have the characteristics of thuristor throw-in and throw-off no-flashy-flow, no switching overvoltage; Have contactor during normal the connection and do not have power consumption, athermic characteristics.One group of thyristor of present embodiment fling-cut switch can be controlled multiple unit capacitor, makes the whole switching capacity of this fling-cut switch big, has effectively reduced the relative volume of switch, improves the utilance of thyristor, has reduced the switch cost.
Description of drawings
Fig. 1 is the circuit diagram of prior art capacitor switching switch;
Fig. 2 is the block diagram of the utility model embodiment;
Fig. 3 is the structure chart of the utility model embodiment switching drive circuit;
Fig. 4 is the detailed structure view of the utility model embodiment control circuit;
Fig. 5 is the detailed circuit diagram of the utility model embodiment switching circuit;
Fig. 6 is a kind of switching command timing figure of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Fig. 2 is the overall structure figure of present embodiment fling-cut switch.As shown in the figure, the power capacitor fling-cut switch of present embodiment comprises switching circuit 20 and control circuit 21.Control circuit 21 comprises photoelectricity coupling input circuit 211, drive circuit 212 and microcontroller circuit 213.Photoelectricity coupling input circuit 211 is used for the photoelectricity coupling input of outside switching order; Microcontroller circuit 213 is used for the monitoring system operation conditions, and produces the clock signal of described switching circuit according to external command; Drive circuit 212 connects described microcontroller circuit and described switching circuit, is used for driving according to described clock signal the switching operation of 20 every groups of electric capacity of switching circuit.
Fig. 3 is the structure chart of present embodiment drive circuit.As shown in the figure, in a preferred embodiment, switching drive circuit 212 further comprises thyristor gating circuit 301 and relay drive circuit 302, thyristor gating circuit 301 connects microcontroller circuit 213 and thyristor 303, and relay drive circuit 302 connects microcontroller circuit 213 and main contactor 304 and secondary contactor 305.
Fig. 4 is the detailed structure view of present embodiment control circuit.As shown in the figure, in a kind of preferred implementation, microcontroller circuit 213 usefulness single-chip microcomputers 401 realize that Fig. 4 has increased open-phase protection circuit 402 and the transistors breakdown testing circuit 403 that links to each other with single-chip microcomputer 401 on the basis of Fig. 3.Photoelectricity coupling input circuit 211 through behind the photoelectrical coupler, is sent into outside switching order in the single-chip microcomputer.Open-phase protection circuit 402 uses transformer to extract the synchronizing signal of three-phase electricity, sends in the single-chip microcomputer, and any one electric mutually disappearance, single-chip microcomputer can both detect, the output of reporting to the police, the electric capacity that excision has dropped into, and forbid that electric capacity drops into again.Transistors breakdown testing circuit 403 is got the level signal of thyristor anode and cathode, sends into single-chip microcomputer after photoelectricity is isolated and detects, if the fault of detecting, single-chip microcomputer is reported to the police and exported, and forbids that electric capacity drops into again.
Fig. 5 is the detailed circuit diagram of present embodiment switching circuit 20.This switching circuit comprises: one group of thyristor T1, T2, organize main contactor K1～Kn more, and organize secondary contactor L1～Ln more, organize capacitor C 1～Cn more, and three-phase electricity IN1, IN2 and IN3.Thyristor T1 and T2 are connected any two-phase electricity IN1 and the IN2 of three-phase electricity respectively, and remaining one mutually electric IN3 connects many group capacitor C 1～Cn.Every group of electric capacity connects one group of main contactor and one group of secondary contactor respectively, connects the secondary contactor and thyristor T1, T2 series connection back and the main contactor parallel connection that is connected this group electric capacity of every group of electric capacity.Below describe the structure of this circuit in detail.
As shown in Figure 5, IN1, IN2, IN3 connect three-phase electricity, and T1 is connected with the main contact 1 of main contactor K1～Kn with the end that IN1 links to each other, and the other end of T1 is connected with the main contact 1 of secondary contactor L1～Ln.T2 is connected with the main contact 3 of main contactor K1～Kn with the end that IN2 links to each other, and the other end is connected with the main contact 3 of secondary contactor L1～Ln.The main contact 2 of main contactor K1～Kn links to each other with main contact 4 with the main contact 2 of secondary contactor L1～Ln respectively with main contact 4.Every group of electric capacity connects one group of main contactor and one group of secondary contactor respectively, the OUT11-OUTn1 of capacitor C1-Cn connects the main contact 2 of main contactor K1-Kn and the main contact 2 of secondary contactor L1-Ln respectively, and OUT12-OUTn2 connects the main contact 4 of main contactor K1-Kn and the main contact 4 of secondary contactor L1-Ln respectively.Thyristor T1, T2 can select full control or half control thyristor by demand, also can adopt each mutually several thyristor series connection to use according to the voltage needs.
Fig. 6 describes present embodiment capacitor switching principle for a kind of switching command timing figure that present embodiment adopted in detail below in conjunction with Fig. 4, Fig. 5 and Fig. 6.The high level of present embodiment external command represents to throw electric capacity, and the low level of external command represents to cut electric capacity, has an external command to control the switching operation of this group electric capacity respectively for each group electric capacity.External command enters single-chip microcomputer 401 by photoelectricity coupling input circuit 211, single-chip microcomputer 401 is analyzed this order for throwing the electric capacity order or cutting the electric capacity order, produces the order of secondary contactor switching according to different orders to control being connected and disconnection of every group of main contactor and secondary contactor with the order of main contactor switching and by relay drive circuit 302; Produce the thuristor throw-in and throw-off order simultaneously and control the connection and the disconnection of thyristor 303 by thyristor gating circuit 301.
With the 2nd group of electric capacity is example, when second group of electric capacity need be when off-state changes to on-state, according to the sequential of Fig. 6 as can be known, at first secondary contactor 2 adhesives, thyristor conducting then, then main contactor 2 adhesives, thyristor disconnects then, and last secondary contactor 2 disconnects.Second group of electric capacity input action this moment (promptly from being disconnected to the action of connection) finished.Above process adopts the series arm of thyristor and secondary contactor 2 to connect earlier, main contactor 2 branch roads are connected then, disconnect the series arm of thyristor and secondary contactor 2 at last, the on-state that keeps main contactor 2, thereby realized that second group capacitor is from being disconnected to the process of connection, owing to adopt thyristor to connect and disconnection, effectively avoided the generation of shoving.
In like manner, when second group of electric capacity need be when on-state changes to off-state, according to the sequential of Fig. 6 as can be known, and at first secondary contactor 2 adhesives, thyristor conducting then, then main contactor 2 disconnects, and thyristor disconnects then, and last secondary contactor disconnects.Above process adopts the series arm of thyristor and secondary contactor 2 to connect earlier, main contactor 2 branch roads disconnect then, disconnect the series arm of thyristor and secondary contactor 2 at last, thereby realized that second group capacitor is from being switched to the process of disconnection, owing to adopt thyristor to connect and disconnection, effectively avoided the generation of shoving.
When first and second groups of electric capacity all need when on-state changes to off-state, present embodiment disconnects first group of electric capacity earlier and disconnects second group of electric capacity then.Concrete operating process according to the time order and function order is: secondary contactor 1 adhesive-＞the thyristor conducting-＞main contactor 1 disconnection-＞the thyristor disconnection-＞secondary contactor 1 disconnection-＞secondary contactor 2 adhesives-＞the thyristor conducting-＞main contactor 2 disconnections-＞the thyristor disconnection-＞secondary contactor 2 disconnections.
The advantage of the existing thuristor throw-in and throw-off no-flashy-flow of intelligent multichannel composite switching switch of the present utility model, no switching overvoltage has contactor not have power consumption, athermic advantage again.The structure of its switching circuit makes one group of thyristor be used for the access and the excision control of multiple unit capacitor, has solved prior art and has controlled in the combination switch of single group capacitor, and the thyristor utilance is low, switch cost height, little, the bulky defective of capacity.
Above embodiment only is used to illustrate the utility model, but not is used to limit the utility model.
Claims (7)
1. a Power-capacitance hurl-slices switch comprises switching circuit and control circuit, it is characterized in that,
Described switching circuit comprises: the one group of thyristor that is electrically connected with any two of three-phase electricity, another at least two group electric capacity that are electrically connected with described three-phase electricity, every group of electric capacity connects one group of main contactor and one group of secondary contactor respectively, connects the secondary contactor and described thyristor series connection back and the main contactor parallel connection that is connected this group electric capacity of every group of electric capacity;
Described control circuit comprises: microcontroller circuit is used for the monitoring system operation conditions, and produces the clock signal of described switching circuit according to external command; Photoelectricity coupling input circuit is used for the photoelectricity coupling input of outside switching order; Drive circuit connects described microcontroller circuit and described switching circuit, is used for driving according to described clock signal the switching operation of described every group of electric capacity.
2. Power-capacitance hurl-slices switch according to claim 1 is characterized in that, described clock signal comprises: secondary contactor clock signal, main contactor clock signal and thyristor clock signal.
3. Power-capacitance hurl-slices switch according to claim 2 is characterized in that, described drive circuit further comprises:
Thyristor gating circuit connects described microcontroller circuit and described thyristor, is used for controlling according to described thyristor clock signal the connection and the disconnection of described thyristor;
Relay drive circuit connects described microcontroller circuit and all main contactors and secondary contactor, is used for controlling being connected and disconnection of every group of main contactor and secondary contactor according to described main contactor clock signal with described secondary contactor clock signal.
4. Power-capacitance hurl-slices switch according to claim 1; it is characterized in that; described control circuit also comprises the open-phase protection circuit that connects described microcontroller circuit; be used to detect three-phase electricity and phase shortage whether occurs; if phase shortage; microprocessor is reported to the police, the electric capacity that excision has dropped into, and forbid that electric capacity drops into again.
5. Power-capacitance hurl-slices switch according to claim 1, it is characterized in that, described control circuit also comprises the transistors breakdown testing circuit that connects described microcontroller circuit and described thyristor, be used for the state of thyristor is monitored, when puncture or not conducting phenomenon appear in thyristor, microprocessor is reported to the police, and forbids that electric capacity drops into again.
6. according to any described Power-capacitance hurl-slices switch of claim among the claim 1-5, it is characterized in that described thyristor is full control thyristor or half control thyristor.
7. according to any described Power-capacitance hurl-slices switch of claim among the claim 1-5, it is characterized in that described every group of electric capacity is corner connection electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201694886U CN201061152Y (en) | 2007-06-28 | 2007-06-28 | Power condenser on/off switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201694886U CN201061152Y (en) | 2007-06-28 | 2007-06-28 | Power condenser on/off switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201061152Y true CN201061152Y (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201694886U Expired - Fee Related CN201061152Y (en) | 2007-06-28 | 2007-06-28 | Power condenser on/off switch |
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| Country | Link |
|---|---|
| CN (1) | CN201061152Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795003B (en) * | 2009-12-11 | 2012-07-18 | 中电普瑞科技有限公司 | Solid combination switch device |
-
2007
- 2007-06-28 CN CNU2007201694886U patent/CN201061152Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795003B (en) * | 2009-12-11 | 2012-07-18 | 中电普瑞科技有限公司 | Solid combination switch device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shidai Corp. Group Assignor: Beijing Times Epoch Technology Co., Ltd. Contract fulfillment period: 2009.5.12 to 2014.5.11 Contract record no.: 2009990000498 Denomination of utility model: Power condenser on/off switch Granted publication date: 20080514 License type: Exclusive license Record date: 20090514 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.5.12 TO 2014.5.11; CHANGE OF CONTRACT Name of requester: SHIDAI GROUP CO. Effective date: 20090514 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20160628 |