CN112711208A - Control circuit and control method for master control combined tripping circuit breaker of wind generating set - Google Patents
Control circuit and control method for master control combined tripping circuit breaker of wind generating set Download PDFInfo
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- CN112711208A CN112711208A CN202011574349.8A CN202011574349A CN112711208A CN 112711208 A CN112711208 A CN 112711208A CN 202011574349 A CN202011574349 A CN 202011574349A CN 112711208 A CN112711208 A CN 112711208A
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- circuit breaker
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
A master control combined tripping circuit breaker control circuit and a control method of a wind generating set comprise a master control tower footing cabinet and a current transformer, wherein a master control circuit is arranged in the master control tower footing cabinet and is connected with a circuit breaker circuit in the current transformer so as to control the circuit breaking work of the current transformer through the master control circuit, the master control circuit comprises a control power supply and an intermediate relay K4, and the control power supply is connected with an intermediate relay K4. The main control tower footing cabinet and the converter are internally provided with the main control combined tripping circuit breaker control circuit, and the main control circuit arranged in the main control tower footing cabinet controls the circuit breaker circuit in the converter, so that the main control combined tripping circuit of the wind generating set is realized, and the main control combined tripping circuit has the main control combined tripping protection function, namely, a main control system sends a control command of breaker breaking at any time according to the current fan fault condition. When the frequency converter has a fault, the frequency converter can not disconnect the main circuit breaker, and when danger is caused to the control of the whole rear end machine, a control instruction can be sent out by the main control tower footing cabinet according to the fault condition.
Description
Technical Field
The invention relates to the field of power control, in particular to a control circuit and a control method of a master control combined tripping circuit breaker of a wind generating set.
Background
When a main fuse wire breaking, a converter request breaking, a converter communication abnormity, a stator contactor opening failure, an excitation contactor opening failure, complete machine inverse power, three-phase current unbalance and three-phase voltage unbalance occur in a grid-connected loop of the wind turbine generator, the functions of opening and closing of a circuit breaker are automatically controlled by the converter according to the self condition, and the control risk level of the complete machine can be increased.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides a control circuit and a control method of a master control combined tripping circuit breaker of a wind generating set.
The purpose of the invention is realized by the following technical scheme.
A master control united tripping circuit breaker control circuit and a control method of a wind generating set comprise a master control tower footing cabinet and a converter, wherein a master control circuit is arranged in the master control tower footing cabinet and is connected with a circuit breaker circuit in the converter, so that the circuit breaking work of the converter is controlled through the master control circuit.
The main control circuit comprises a control power supply and an intermediate relay K4, and the control power supply is connected with the intermediate relay K4.
The intermediate relay K4 is a normally closed contact.
The circuit breaker circuit includes auxiliary relay K3, converter controller, auxiliary relay K5 and the circuit breaker that is incorporated into the power networks, auxiliary relay K3 coil part passes through auxiliary relay K4 with control power supply is connected, auxiliary relay K3 normally open contact pass through control button SB with converter controller DI module is connected, converter controller DO module with auxiliary relay K5 coil part phase connection, auxiliary relay K5 normally open contact sets up in the circuit breaker that is incorporated into the power networks.
The grid-connected circuit breaker is internally provided with a normally open contact of the intermediate relay K5, and the normally open contact of the intermediate relay K5 is connected with a release YO arranged in the grid-connected circuit breaker so as to realize the disconnection of the grid-connected circuit breaker.
A control method for a master control combined tripping circuit breaker control circuit of a wind generating set comprises the following steps:
the main control tower footing cabinet makes the intermediate relay K4 electrified through the control power supply, the normally closed contact of the intermediate relay K4 breaks the coil part of the intermediate relay K3 and loses electricity, after the coil part of the intermediate relay K3 loses electricity, the normally open contact of the intermediate relay K3 is changed into an open circuit state and sends a signal to the converter controller DI module, after the converter controller detects a brake separating signal sent by the main control tower footing cabinet, the converter controller DO module outputs 24V current to the coil part of the intermediate relay K5, after the coil part of the intermediate relay K5 is electrified, the normally open contact of the intermediate relay K5 is closed to make the release YO electrified, after the release YO is electrified, the grid-connected circuit breaker is disconnected, and the frequency converter stops working.
A control method of a master control combined tripping circuit breaker control circuit of a wind generating set comprises the following steps:
the main control column foot cabinet passes through control power makes intermediate relay K4 loses the electricity, intermediate relay K4's normally closed contact is the closed condition, when intermediate relay K3's coil part got the electricity intermediate relay K3's normally open contact keeps the disconnection, its DO module is out of work after controller DI module received the signal of closing a floodgate, intermediate relay K5 coil part keeps losing the electricity state, intermediate relay K5 normally open contact keeps the off-state, the release YO loses the electricity, the circuit breaker that is incorporated into the power networks is operating condition, and the converter normally works.
The invention has the beneficial effects that: the scheme aims at improving the control risk level of the whole wind turbine generator system by only using the current transformer to automatically control the breaking and closing functions of the circuit breaker according to the self condition in the prior art. According to the scheme, the main control united tripping circuit breaker control circuit is arranged in the main control tower footing cabinet and the converter, and the main control circuit arranged in the main control tower footing cabinet is used for controlling the circuit breaker circuit in the converter, so that the main control united tripping circuit of the wind generating set is realized, and the main control united tripping protection function is realized, namely, a main control system issues a control command for breaking the circuit breaker at any time according to the current fan fault condition. When the frequency converter has a fault, the main circuit breaker cannot be disconnected by the frequency converter, and when danger is caused to the control of the whole rear end machine, a control instruction can be sent out by the main control tower footing cabinet according to the fault condition, so that the safety guarantee is increased.
Drawings
FIG. 1 is a circuit diagram of the present invention;
FIG. 2 is a logic diagram of the operation of the relay when the master control opens the brake;
in the figure: the system comprises a main control tower footing cabinet 1, a converter 2, a converter controller 3 and a grid-connected breaker 4.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
A master control united tripping circuit breaker control circuit and a control method of a wind generating set comprise a master control tower footing cabinet 1 and a converter 2, wherein a master control circuit is arranged in the master control tower footing cabinet 1 and is connected with a circuit breaker circuit in the converter 2, so that the circuit breaking work of the converter 2 is controlled through the master control circuit.
The main control circuit comprises a control power supply and an intermediate relay K4, and the control power supply is connected with the intermediate relay K4.
The intermediate relay K4 is a normally closed contact.
The breaker circuit comprises an intermediate relay K3, a converter controller 3, an intermediate relay K5 and a grid-connected breaker 4, wherein a coil part of the intermediate relay K3 is connected with a control power supply through an intermediate relay K4, a normally open contact of the intermediate relay K3 is connected with a 3DI (direct current) module of the converter controller through a control button SB, a DO (DO all-insulated) module of the converter controller 3 is connected with a coil part of the intermediate relay K5, and a normally open contact of the intermediate relay K5 is arranged in the grid-connected breaker 4.
The grid-connected circuit breaker 4 is internally provided with a normally open contact of an intermediate relay K5, and the normally open contact of an intermediate relay K5 is connected with a release YO arranged in the grid-connected circuit breaker 4 so as to realize the circuit breaking of the grid-connected circuit breaker 4.
A control method of a master control combined tripping circuit breaker control circuit of a wind generating set is characterized in that a grid-connected circuit breaker 4 disconnection operation method comprises the following steps:
the main control tower footing cabinet 1 enables the intermediate relay K4 to be powered on through a control power supply, the normally closed contact of the intermediate relay K4 breaks the coil part of the intermediate relay K3 and loses power, after the coil part of the intermediate relay K3 loses power, the normally open contact of the intermediate relay K3 is changed into an open circuit state and sends a signal to the converter controller 3DI module, after the converter controller 3 detects a brake separating signal sent by the main control tower footing cabinet 1, the converter controller 3DO module outputs 24V current to the coil part of the intermediate relay K5, after the coil part of the intermediate relay K5 is powered on, the normally open contact of the intermediate relay K5 is closed to enable the release YO to be powered on, after the release YO is powered on, the grid-connected circuit breaker 4 is disconnected, and the frequency converter stops working.
A control method of a master control combined tripping circuit breaker control circuit of a wind generating set is characterized in that a closing operation method of a grid-connected circuit breaker 4 comprises the following steps:
the main control tower footing cabinet 1 makes the intermediate relay K4 lose power through the control power supply, the normally closed contact of the intermediate relay K4 is in a closed state, the normally open contact of the intermediate relay K3 keeps open when the coil part of the intermediate relay K3 gets power, the DO module does not work after the controller 3DI module receives a closing signal, the coil part of the intermediate relay K5 keeps in a power-off state, the normally open contact of the intermediate relay K5 keeps in a disconnected state, the release YO loses power, the grid-connected circuit breaker 4 is in a working state, and the frequency converter works normally.
The working principle of the technical scheme is as follows;
the process of the working circuit to open the grid-connected circuit breaker 4 is as follows: after the main control tower footing cabinet 1 utilizes the control power supply to enable the intermediate relay K4 to be powered on, the normally closed contact of the intermediate relay K4 disconnects the coil part of the intermediate relay K3 to be powered off, the normally open contact of the intermediate relay K3 becomes an open circuit state after the coil part of the intermediate relay K3 is powered off and sends a signal to the converter controller 3DI module, after the converter controller 3 detects a brake separating signal sent by the main control tower footing cabinet 1, the converter controller 3DO module outputs 24V current to the coil part of the intermediate relay K5, after the coil part of the intermediate relay K5 is powered on, the normally open contact of the intermediate relay K5 is closed to enable the release YO to be powered on, and when the release YO is powered on, the grid-connected circuit breaker 4 is disconnected, and the frequency converter stops working.
The flow of the working circuit closing the grid-connected circuit breaker 4 is as follows: the main control tower footing cabinet 1 utilizes a control power supply to enable the intermediate relay K4 to lose power, a normally closed contact of the intermediate relay K4 is in a closed state, a normally open contact of the intermediate relay K3 keeps disconnected when a coil part of the intermediate relay K3 is powered on, a DO module of the controller 3DI module does not work after receiving a closing signal, a coil part of the intermediate relay K5 keeps in a power-off state, a normally open contact of the intermediate relay K5 keeps in a disconnected state, a release YO loses power, the grid-connected circuit breaker 4 is in a working state, and a frequency converter works normally.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A master control combined tripping circuit breaker control circuit and a control method of a wind generating set are characterized in that: the main control tower footing cabinet is internally provided with a main control circuit, and the main control circuit is connected with a circuit breaker circuit in the converter so as to control the open circuit work of the converter through the main control circuit.
2. The control circuit and the control method of the master control combined tripping circuit breaker of the wind generating set according to claim 1 are characterized in that: the main control circuit comprises a control power supply and an intermediate relay K4, and the control power supply is connected with the intermediate relay K4.
3. The control circuit and the control method of the master control combined tripping circuit breaker of the wind generating set according to claim 2 are characterized in that: the intermediate relay K4 is a normally closed contact.
4. The control circuit and the control method of the master control combined tripping circuit breaker of the wind generating set according to claim 2 are characterized in that: the circuit breaker circuit includes auxiliary relay K3, converter controller, auxiliary relay K5 and the circuit breaker that is incorporated into the power networks, auxiliary relay K3 coil part passes through auxiliary relay K4 with control power supply is connected, auxiliary relay K3 normally open contact pass through control button SB with converter controller DI module is connected, converter controller DO module with auxiliary relay K5 coil part phase connection, auxiliary relay K5 normally open contact sets up in the circuit breaker that is incorporated into the power networks.
5. The control circuit and the control method of the master control combined tripping circuit breaker of the wind generating set according to claim 2 are characterized in that: the grid-connected circuit breaker is internally provided with a normally open contact of the intermediate relay K5, and the normally open contact of the intermediate relay K5 is connected with a release YO arranged in the grid-connected circuit breaker so as to realize the disconnection of the grid-connected circuit breaker.
6. A control method for a master control combined tripping circuit breaker control circuit of a wind generating set is characterized in that the grid-connected circuit breaker disconnection operation method comprises the following steps:
the main control tower footing cabinet makes the intermediate relay K4 electrified through the control power supply, the normally closed contact of the intermediate relay K4 breaks the coil part of the intermediate relay K3 and loses electricity, after the coil part of the intermediate relay K3 loses electricity, the normally open contact of the intermediate relay K3 is changed into an open circuit state and sends a signal to the converter controller DI module, after the converter controller detects a brake separating signal sent by the main control tower footing cabinet, the converter controller DO module outputs 24V current to the coil part of the intermediate relay K5, after the coil part of the intermediate relay K5 is electrified, the normally open contact of the intermediate relay K5 is closed to make the release YO electrified, after the release YO is electrified, the grid-connected circuit breaker is disconnected, and the frequency converter stops working.
7. A control method of a master control combined tripping circuit breaker control circuit of a wind generating set is characterized in that the closing operation method of a grid-connected circuit breaker comprises the following steps:
the main control column foot cabinet passes through control power makes intermediate relay K4 loses the electricity, intermediate relay K4's normally closed contact is the closed condition, when intermediate relay K3's coil part got the electricity intermediate relay K3's normally open contact keeps the disconnection, its DO module is out of work after controller DI module received the signal of closing a floodgate, intermediate relay K5 coil part keeps losing the electricity state, intermediate relay K5 normally open contact keeps the off-state, the release YO loses the electricity, the circuit breaker that is incorporated into the power networks is operating condition, and the converter normally works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574349.8A CN112711208A (en) | 2020-12-28 | 2020-12-28 | Control circuit and control method for master control combined tripping circuit breaker of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574349.8A CN112711208A (en) | 2020-12-28 | 2020-12-28 | Control circuit and control method for master control combined tripping circuit breaker of wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112711208A true CN112711208A (en) | 2021-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011574349.8A Pending CN112711208A (en) | 2020-12-28 | 2020-12-28 | Control circuit and control method for master control combined tripping circuit breaker of wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112711208A (en) |
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2020
- 2020-12-28 CN CN202011574349.8A patent/CN112711208A/en active Pending
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Effective date of registration: 20210922 Address after: 300308 No. 100, Hangtian Road, Tianjin pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Applicant after: TIANJIN RUIYUAN ELECTRICAL Co.,Ltd. Address before: No.1 Xinghua No.7 Branch Road, economic development zone, Xiqing District, Tianjin Applicant before: RENERGY ELECTRIC TIANJIN Ltd. |