CN203674705U - Controllable series compensated fault current-limiting control device - Google Patents
Controllable series compensated fault current-limiting control device Download PDFInfo
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- CN203674705U CN203674705U CN201420066406.5U CN201420066406U CN203674705U CN 203674705 U CN203674705 U CN 203674705U CN 201420066406 U CN201420066406 U CN 201420066406U CN 203674705 U CN203674705 U CN 203674705U
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Abstract
The utility model discloses a controllable series compensated fault current-limiting control device, which comprises a relay, a first branch, a second branch, a third branch, a fourth branch and a fifth branch, wherein the first branch is composed of a capacitor and a current transformer which are connected in series; the second branch is composed of a phase controlled electric reactor L and an antiparallel thyristor which are connected in series; the third branch is composed of a metal oxide voltage limiter MOV; the fourth branch is composed of a current-limiting inductor L2; the fifth branch is composed of a relay contact switch; and the first branch is connected with the second branch in parallel, the fourth branch is connected with the fifth branch in parallel, a circuit formed by parallelly connecting the first branch and the second branch is connected with a circuit formed by parallelly connecting the fourth branch and the fifth branch in series, and then connected with the third branch in parallel. The controllable series compensated fault current-limiting control device further comprises a rectifying circuit, a voltage-dividing circuit, a filtering circuit and a control circuit which are sequentially connected, wherein the rectifying circuit is connected with the current transformer, and the control circuit is connected with a coil of the relay. When a short circuit fault occurs in the circuit, the controllable series compensated fault current-limiting control device can automatically connect the current-limiting inductor in series, so that the controllable series compensated fault current-limiting control device is in sensible operation externally, and the fault current level is lowered.
Description
Technical field
The utility model belongs to field of power system control, relates to a kind of controlled series compensation failure current limit control device.
Background technology
Electric power system is nonlinear complication system, and controlled series compensation is a kind of new controller of studying the more practical application of getting back in flexible AC transmitting system.By regulating the Trigger Angle of thyristor of controlled series compensation can regulate the equivalent impedance of transmission line flexibly, continuously, smoothly, on a large scale, the damping of increase system, control the merit angle tracking stationary value of generator, thereby effectively suppress the low-frequency oscillation of electric power system, improve the stability of system.
Short trouble is huge on power system security impact, and short circuit current is the operation and development of conference restriction electrical network too.Controlled series compensation adopts power electronic device, is swift in motion, and controls easyly, in the time that circuit is short-circuited fault, controls it and is perception operation, can reduce fault current levels.Thereby, design a kind of controlled series compensation failure current limit control device, make it in the time that circuit is short-circuited fault, be perception operation, be the important subject of power industry.
utility model content
Technical problem to be solved in the utility model is to provide a kind of controlled series compensation failure current limit control device, can, in the time that circuit is short-circuited fault, be automatically connected into current-limiting inductance, makes it externally be perception operation, reduces fault current levels.
The technical solution of utility model is as follows:
A kind of controlled series compensation failure current limit control device, comprises relay; The first branch road, is composed in series by an electric capacity and a current transformer; The second branch road, is made up of Controlled Reactor L and antiparallel Thyristors in series; The 3rd branch road, by metal oxide pressure-limiting device, MOV forms; The 4th branch road, by current-limiting inductance, L2 forms; The 5th branch road, is made up of relay contact switch; Described the first branch road and the second branch circuit parallel connection, the 4th branch road and the 5th branch circuit parallel connection, the first branch road is connected with the circuit after the 5th branch circuit parallel connection with the 4th branch road with the circuit after the second branch circuit parallel connection again, and then with the 3rd branch circuit parallel connection.Controlled series compensation failure current limit control device also comprises the rectification circuit, bleeder circuit, filter circuit, the control circuit that connect successively; Described rectification circuit is connected with current transformer, and described control circuit is connected with the coil of relay.
Control circuit is single-chip microcomputer.
Beneficial effect:
The utility model can, in the time that circuit is short-circuited fault, be automatically connected into current-limiting inductance, makes it externally be perception operation, reduces fault current levels.
Accompanying drawing explanation
Fig. 1 is controlled series compensation failure current limit control device theory diagram in the utility model.
Embodiment
Below with reference to the drawings and specific embodiments, utility model is described in further details:
Embodiment 1:
Controlled series compensation failure current limit control device block diagram as shown in Figure 1, comprises relay; The first branch road, is composed in series by an electric capacity and a current transformer; The second branch road, is made up of Controlled Reactor L and antiparallel Thyristors in series; The 3rd branch road, by metal oxide pressure-limiting device, MOV forms; The 4th branch road, by current-limiting inductance, L2 forms; The 5th branch road, is made up of relay contact switch; The first branch road and the second branch circuit parallel connection, the 4th branch road and the 5th branch circuit parallel connection, the first branch road is connected with the circuit after the 5th branch circuit parallel connection with the 4th branch road with the circuit after the second branch circuit parallel connection again, and then with the 3rd branch circuit parallel connection.Controlled series compensation failure current limit control device also comprises the rectification circuit, bleeder circuit, filter circuit, the control circuit that connect successively; Described rectification circuit is connected with current transformer, and described control circuit is connected with the coil of relay.Control circuit can be single-chip microcomputer.
When normal operation, the 5th branch road repeat circuit contact switch closure, controlled series compensation circuit working is in string benefit state.While being short-circuited fault, current transformer records electric current in circuit, through rectification circuit rectification, bleeder circuit is converted into voltage signal, then through filter circuit filtering, inputs to control circuit, in control circuit, set in advance normal circuit circuit fluctuation range, and short circuit current scope.Control circuit detects that institute's input signal enters short circuit current scope, control relay coil motion, and the 5th branch road repeat circuit contact switch disconnects, and current-limiting inductance L2 connects as in circuit.Controlled series compensation is externally perception operation, reduces fault current levels.
Claims (2)
1. a controlled series compensation failure current limit control device, is characterized in that, comprises relay; The first branch road, is composed in series by an electric capacity and a current transformer; The second branch road, is made up of Controlled Reactor L and antiparallel Thyristors in series; The 3rd branch road, by metal oxide pressure-limiting device, MOV forms; The 4th branch road, by current-limiting inductance, L2 forms; The 5th branch road, is made up of relay contact switch; Described the first branch road and the second branch circuit parallel connection, the 4th branch road and the 5th branch circuit parallel connection, the first branch road is connected with the circuit after the 5th branch circuit parallel connection with the 4th branch road with the circuit after the second branch circuit parallel connection again, and then with the 3rd branch circuit parallel connection;
Described controlled series compensation failure current limit control device also comprises the rectification circuit, bleeder circuit, filter circuit, the control circuit that connect successively; Described rectification circuit is connected with current transformer, and described control circuit is connected with the coil of relay.
2. controlled series compensation failure current limit control device as claimed in claim 1, is characterized in that, described control circuit is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420066406.5U CN203674705U (en) | 2014-02-15 | 2014-02-15 | Controllable series compensated fault current-limiting control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420066406.5U CN203674705U (en) | 2014-02-15 | 2014-02-15 | Controllable series compensated fault current-limiting control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203674705U true CN203674705U (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420066406.5U Expired - Fee Related CN203674705U (en) | 2014-02-15 | 2014-02-15 | Controllable series compensated fault current-limiting control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203674705U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790227A (en) * | 2016-04-20 | 2016-07-20 | 安徽伊格瑞德电气设备有限公司 | Series compensation zero-loss current limiting integrated system |
-
2014
- 2014-02-15 CN CN201420066406.5U patent/CN203674705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790227A (en) * | 2016-04-20 | 2016-07-20 | 安徽伊格瑞德电气设备有限公司 | Series compensation zero-loss current limiting integrated system |
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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 |
Granted publication date: 20140625 Termination date: 20150215 |
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| EXPY | Termination of patent right or utility model |