CN201113799Y - Combination type direct current voltage adjusting apparatus - Google Patents
Combination type direct current voltage adjusting apparatus Download PDFInfo
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- CN201113799Y CN201113799Y CNU2007200749947U CN200720074994U CN201113799Y CN 201113799 Y CN201113799 Y CN 201113799Y CN U2007200749947 U CNU2007200749947 U CN U2007200749947U CN 200720074994 U CN200720074994 U CN 200720074994U CN 201113799 Y CN201113799 Y CN 201113799Y
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- silicon chain
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Abstract
The utility model relates to a device for adjusting voltage, in particular to a device for adjusting a DC voltage. A combined DC voltage adjusting device comprises a positive electrode and a negative electrode of a closing bus, a positive electrode and a negative electrode of a control bus and a silicon chain automatic voltage reduction circuit which is arranged between the positive electrode of the closing bus and the positive electrode of the control bus and consists of a voltage reduction silicon chain and a corresponding contactor bypass. The utility model is characterized in that chopped wave voltage reduction circuits are arranged between the positive electrode and the negative electrode of the closing bus and between the positive electrode and the negative electrode of the control bus, an output voltage value of the chopped wave voltage reduction circuit is higher than that of the silicon chain automatic voltage reduction circuit; the chopped wave voltage reduction circuit is provided with a current upper limit protector. The combined DC voltage adjusting device has high accuracy of voltage adjustment, high response speed, wide range of adjustment and reliable and stable operation.
Description
Technical field
The utility model relates to a kind of device of regulation voltage, particularly a kind of adjusting device of direct voltage.
Background technology
Continuous-current plant is a kind of supply unit that exchanges input, direct current output; its effect provides required DC power supply such as high-voltage switch gear breaking-closing operating, relaying protection, automation control, diesel engine generator startup and emergency lighting, and it is the essential key equipment that relates to system safety of electric substation, electric panel room.
Continuous-current plant must configuration voltages be adjusted circuit and control circuit thereof, and the effect of voltage-regulating circuit is that higher charging voltage is reduced to required control busbar voltage.As to control busbar voltage be 110V, and the float charge voltage of lead acid accumulator, even charging voltage are respectively 123V and 130V, then need step-down 13V to 20V.The effect of its control circuit is the variation of real-Time Tracking Control busbar voltage, and voltage-regulating circuit is dynamically controlled, and makes its output voltage remain on certain scope, is 110V as the control busbar voltage, and then its output area is generally 100V to 120V.Under the prior art condition, what voltage-regulating circuit adopted usually is traditional automatic reduction voltage circuit of silicon chain, perhaps comparatively novel chopping depressuring circuit.
Referring to Fig. 1, the automatic reduction voltage circuit 1 of a kind of Pyatyi silicon chain, this reduction voltage circuit 1 is serially connected with step-down silicon chain 3 between anodal HM+ of closing bus bar and the anodal KM+ of control bus, and be equipped with contactor bypass 4, by automatic control, realize the adjustment and the control of voltage with the length of control silicon chain to contactor bypass 4.Automatic reduction voltage circuit 1 basic functional principle of Pyatyi silicon chain is: when the anodal KM+ voltage of control bus reduces and is lower than the lower bound set point, progressively control contactor MS1～MS5 adhesive in order, make corresponding buck diode group SID1～SID5 that the silicon chain length is shortened, thereby make the voltage of the anodal KM+ of control bus obtain raising, until setting range; When control bus KM+ voltage raises and is higher than high limit set point, progressively control contactor MS5～MS1 discharges in order, make the diode group SID5～SID1 of correspondence seal in the silicon chain and the silicon chain length is increased, thereby the anodal KM+ voltage of control bus is reduced, until setting range.
The automatic reduction voltage circuit current capacity of this silicon chain is strong, and what it adopted is classification, serial connection technology, and the progression of silicon chain is many more, and it is high more that voltage is adjusted precision, but control is complicated more.The voltage that it is adjusted is phase step type, adhesive or discharge a contactor has changed a magnitude of voltage, can't realize controlling steadily adjusting continuously of busbar voltage, and reliability is relatively poor, and any one diode breakdown all will cause the interruption of control busbar voltage in the silicon chain.
Referring to Fig. 2, a kind of chopping depressuring circuit 2, these circuit 2 main electronic devices are DC chopper 5, DC chopper 5 is arranged between anodal HM+ of closing bus bar and the anodal KM+ of control bus.A filter 6 is set in chopping depressuring circuit 2 in addition, gives steady output voltage.This filter 6 comprises diode V
D, inductance L and capacitor C, diode V
DBe arranged between DC chopper 5 outputs and the closing bus bar negative pole HM-, inductance L is arranged between DC chopper 5 outputs and the anodal KM+ of control bus, and capacitor C is arranged between anodal KM+ of control bus and the control bus negative pole KM-.Usually take the make-and-break time ratio of switch element in the PWM control technology control DC chopper 5, realize the adjustment and the control of voltage with the size that changes VD.
Compare with the automatic reduction voltage circuit of silicon chain, the chopping depressuring circuit has higher pressure regulation precision, quicker response, bigger adjustable range, has good energy-saving effect simultaneously, but the chopping depressuring circuit is owing to be subjected to the restriction of switch element power, the current capacity relative deficiency, and also not ideal enough aspect reliability, in case switch element damages, will cause the interruption of control busbar voltage.
The utility model content
In view of above two kinds of regulating circuits pluses and minuses separately, the purpose of this utility model is to provide a kind of combined DC voltage adjusting device, and this voltage adjusting device pressure regulation precision height, response speed is fast, adjustable range is big, stable and reliable operation.
The utility model is achieved in that a kind of combined DC voltage adjusting device, comprise the closing bus bar positive and negative electrode, control bus positive and negative electrode, and be arranged on closing bus bar anodal with the automatic reduction voltage circuit of controlling between the bus positive pole of silicon chain, the automatic reduction voltage circuit of silicon chain is made up of step-down silicon chain and the bypass of corresponding contact device, it is characterized in that: also be provided with the chopping depressuring circuit between closing bus bar positive and negative electrode and the control bus positive and negative electrode, described chopping depressuring circuit output voltage value is higher than the output voltage values of the automatic reduction voltage circuit of silicon chain.
Described chopping depressuring circuit is provided with the upper current limit protective device.
The utility model is that the chopping depressuring circuit is organically combined with the automatic reduction voltage circuit of silicon chain, is the auxilliary work of carrying out based on chopping depressuring circuit, the automatic reduction voltage circuit of silicon chain.In course of normal operation, because make the output voltage values of chopping depressuring circuit be higher than the output voltage values of the automatic reduction voltage circuit of silicon chain by automatic control, so the silicon chain is in nonconducting state all the time and does not bear any load, be that the automatic reduction voltage circuit of silicon chain is in off position, bear normal duty and the chopping depressuring circuit is in running order all the time.Just the normal duty electric current is born by the chopping depressuring circuit, and chopping depressuring circuit pressure regulation precision height, response speed is fast, adjustable range is big, and advantages such as good energy-conserving effect are fully utilized, and realizes the stepless adjustment and the stable control of control busbar voltage well.When load short circuits or other reason cause that load current rises suddenly; because the chopping depressuring circuit has the upper current limit protective device; so its output current can not surpass the higher limit that sets; so unexpected rising of load current; certainly will cause the rapid decline of chopping depressuring circuit output voltage value; so the forward voltage values that the silicon chain is born is higher than the minimum voltage value of its conducting and is open-minded automatically; thereby bear improper load by the automatic reduction voltage circuit of silicon chain; guaranteed the continuous supply of load current; the strong characteristics of the automatic reduction voltage circuit bearing capacity of silicon chain are fully utilized; also protect the chopping depressuring circuit not to be subjected to super-high-current simultaneously and damage, guarantee the reliability of voltage-regulating circuit.When the chopping depressuring circuit broke down, the automatic reduction voltage circuit of silicon chain was devoted oneself to work automatically, further guarantees the reliability of voltage-regulating circuit.The utility model reaches the purpose to the dynamic adjustment of direct voltage and stable control, and it is highly suitable for having high stability, the continuous-current plant of high reliability request.
Description of drawings
Fig. 1 is the automatic reduction voltage circuit schematic diagram of Pyatyi silicon chain;
Fig. 2 is a kind of chopping depressuring circuit diagram;
Fig. 3 is the utility model combined DC voltage adjusting device schematic diagram.
Among the figure: the automatic reduction voltage circuit of 1 Pyatyi silicon chain, 2 chopping depressuring circuit, 3 step-down silicon chains, 4 contactor bypasses, 5 DC chopper, 6 filters.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 3, a kind of combined DC voltage adjusting device, comprise closing bus bar positive and negative electrode HM+, HM-, control bus positive and negative electrode KM+, KM-, be provided with the automatic reduction voltage circuit 1 of Pyatyi silicon chain between anodal HM+ of closing bus bar and the anodal KM+ of control bus, the automatic reduction voltage circuit 1 of Pyatyi silicon chain is made up of step-down silicon chain 3 and corresponding contact device bypass 4.Also be provided with the chopping depressuring circuit 2 of belt current upscale protection device between closing bus bar positive and negative electrode HM+, HM-and control bus positive and negative electrode KM+, the KM-.Chopping depressuring circuit 2 comprises DC chopper 5 and filter 6, and DC chopper 5 is arranged between anodal HM+ of closing bus bar and the anodal KM+ of control bus, and filter 6 is in order to steady output voltage, and it comprises diode V
D, inductance L and capacitor C, diode V
DBe arranged between DC chopper 5 outputs and the closing bus bar negative pole HM-, inductance L is arranged between DC chopper 5 outputs and the anodal KM+ of control bus, and capacitor C is arranged between anodal KM+ of control bus and the control bus negative pole KM-.Take the make-and-break time ratio of switch element in the PWM control technology control DC chopper 5, realize the adjustment and the control of voltage with the size that changes VD.
By automatic control, make chopping depressuring circuit 2 output voltage values be higher than the output voltage values of the automatic reduction voltage circuit 1 of silicon chain.
In course of normal operation, because make the output voltage values of chopping depressuring circuit 2 be higher than the output voltage values of the automatic reduction voltage circuit 1 of Pyatyi silicon chain by automatic control, the silicon chain is in nonconducting state all the time and does not bear any load, bears normal duty and chopping depressuring circuit 2 is in running order all the time.When load short circuits or other reason cause that load current rises suddenly; because chopping depressuring circuit 2 has the upper current limit protective device; so its output current can not surpass the higher limit that sets; when load current rises suddenly; certainly will cause the rapid decline of chopping depressuring circuit 2 output voltage values; so the forward voltage values that the automatic reduction voltage circuit 1 of Pyatyi silicon chain is born is higher than the minimum voltage value of its conducting and is open-minded automatically; thereby bear improper load by the automatic reduction voltage circuit 1 of Pyatyi silicon chain, guaranteed the continuous supply of load current.
More than by embodiment embodiment of the present utility model has been described, but it should be understood that concrete description should not be construed as the qualification to essence of the present utility model and scope here.Be not limited to Pyatyi such as silicon chain quantity, filter 6 also can be other circuit structures.The various modifications after reading this specification the foregoing description made of one of ordinary skilled in the art in a word all belong to the scope that the utility model is protected.
Claims (2)
1. combined DC voltage adjusting device, comprise that closing bus bar just, negative pole (HM+, HM-), the control bus just, negative pole (KM+, KM-), and be arranged on the automatic reduction voltage circuit of silicon chain (1) between closing bus bar positive pole (HM+) and control bus positive pole (KM+), the automatic reduction voltage circuit of silicon chain (1) is made up of step-down silicon chain (3) and corresponding contact device bypass (4), it is characterized in that: closing bus bar just, negative pole (HM+, HM-) with control bus just, negative pole (KM+, KM-) also be provided with chopping depressuring circuit (2) between, described chopping depressuring circuit (2) output voltage values is higher than the output voltage values of the automatic reduction voltage circuit of silicon chain (1).
2. according to the described combined DC voltage adjusting device of claim 1, it is characterized in that: described chopping depressuring circuit (2) is provided with the upper current limit protective device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200749947U CN201113799Y (en) | 2007-09-25 | 2007-09-25 | Combination type direct current voltage adjusting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200749947U CN201113799Y (en) | 2007-09-25 | 2007-09-25 | Combination type direct current voltage adjusting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201113799Y true CN201113799Y (en) | 2008-09-10 |
Family
ID=39965544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200749947U Expired - Fee Related CN201113799Y (en) | 2007-09-25 | 2007-09-25 | Combination type direct current voltage adjusting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201113799Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014166368A1 (en) * | 2013-04-08 | 2014-10-16 | 国家电网公司 | Direct-current power source system for non-floating charging lithium type station |
| CN104345223A (en) * | 2013-07-26 | 2015-02-11 | 中核核电运行管理有限公司 | 6KV voltage transformer and secondary loop power supply monitoring method thereof |
-
2007
- 2007-09-25 CN CNU2007200749947U patent/CN201113799Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014166368A1 (en) * | 2013-04-08 | 2014-10-16 | 国家电网公司 | Direct-current power source system for non-floating charging lithium type station |
| CN104345223A (en) * | 2013-07-26 | 2015-02-11 | 中核核电运行管理有限公司 | 6KV voltage transformer and secondary loop power supply monitoring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20080910 Termination date: 20160925 |