CN218124397U - Solid state controller in circuit breaker - Google Patents
Solid state controller in circuit breaker Download PDFInfo
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- CN218124397U CN218124397U CN202222411100.6U CN202222411100U CN218124397U CN 218124397 U CN218124397 U CN 218124397U CN 202222411100 U CN202222411100 U CN 202222411100U CN 218124397 U CN218124397 U CN 218124397U
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Abstract
The present disclosure discloses a solid state controller in a circuit breaker, comprising: the device comprises a signal processing module, a control module and an IGBT discharging module; the input end of the signal processing module is externally connected with the sensor, and the output end of the signal processing module is connected with the input end of the control module; the first output end of the control module is connected with the first input end of the IGBT discharging module, and the output end of the IGBT discharging module is connected with the permanent magnet mechanism coil.
Description
Technical Field
The utility model belongs to switching power equipment control field, concretely relates to solid state controller in circuit breaker.
Background
From the prior art level and the equipment informatization degree, along with the breakthrough of the primary technology and the secondary technology and the development of the advanced application subsystem, the intelligent electrical equipment not only can realize basic applications such as sequential control, misoperation prevention and the like, but also needs to realize additional functions such as equipment operation state self-perception, fault self-diagnosis, intelligent decision and the like, so that the intelligent level of the intelligent electrical equipment is continuously improved, and the operation reliability and efficiency of an electric power system are improved.
The breaker is widely applied to a power system, has the characteristics of complex structure, high technical content, high economic value and the like, is mainly used for breaking load current and protecting faults such as short circuit, overload and the like in the system, and plays dual roles of control and protection in the power system. The monitoring and protection of the traditional circuit breaker are mostly realized by monitoring the action of a mechanical system of the traditional circuit breaker, and the problems of poor product consistency, difficult parameter setting, low protection precision, long action time, no self-detection and self-diagnosis function and the like mainly exist, so that the traditional circuit breaker is not beneficial to practical popularization and application.
Currently, intelligence is an important direction for the development of circuit breakers, and as an intelligent solid-state controller for the brain of the circuit breaker, the intelligence degree of the intelligent solid-state controller directly determines the intelligence level of the circuit breaker device. The rapid development of the solid-state switch technology and the microcomputer system technology provides new power for the development of the intelligent solid-state controller. The intelligent solid-state controller not only needs to realize various control and protection functions of the traditional circuit breaker, but also has the diversity and the selectivity of control and protection; meanwhile, the intelligent solid-state controller also needs to display relevant parameters of the equipment in real time, so that operation and maintenance personnel can adjust various parameters in time according to the field conditions conveniently, and the intelligent solid-state controller has the functions of self-detection and early warning; in addition, the intelligent controller is also provided with a wired and wireless communication interface, so that the intelligent controller can conveniently communicate with a control collection terminal, an upper computer and mobile equipment, and the functions of remote measurement, remote control, remote signaling and remote regulation of the power system are realized.
At present, the mainstream intelligent controllers basically occupy monopoly positions of international companies such as ABB, schneider and the like, the mechanical structure of the intelligent controllers is higher in operation requirement, the intelligent controllers are difficult to be well fused with domestic circuit breaker equipment for use, and meanwhile, the number of domestic mature intelligent controllers is relatively small, so that the intelligent level of the whole circuit breaker is lower; secondly, the existing solid-state controller still depends on central control protection information action or manual control of field operation and maintenance personnel, the state information (such as opening and closing currents, displacement and the like) of the equipment is mainly displayed, real-time on-site state judgment and fault disconnection cannot be realized through the state information of the equipment, and the operation reliability of the circuit breaker is not improved; in addition, the existing solid-state controller lacks systematic and comprehensive design, lacks information interaction among devices, and cannot realize transverse diagnosis and bidirectional communication of the devices.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the disclosed solid-state controller in the circuit breaker is provided, the solid-state controller regulates and controls parameters of a charge-discharge loop based on the power conversion technology of an advanced solid-state switch, optimizes the operating characteristics of the opening and closing process, and can realize intelligent control of a permanent magnet mechanism.
In order to achieve the above purpose, the present disclosure provides the following technical solutions:
a solid state controller in a circuit breaker, comprising:
the device comprises a signal processing module, a control module and an IGBT discharging module; wherein,
the input end of the signal processing module is externally connected with the sensor, and the output end of the signal processing module is connected with the input end of the control module;
the first output end of the control module is connected with the first input end of the IGBT discharging module, and the output end of the IGBT discharging module is connected with the permanent magnet mechanism coil.
Preferably, the signal processing module includes: the input end of the band-pass filter circuit is externally connected with the sensor, and the output end of the band-pass filter circuit is connected with the signal amplification circuit.
Preferably, the control module includes: and a single chip microcomputer.
Preferably, the IGBT discharging module includes: IGBT submodule, resistance submodule and diode.
Preferably, the solid-state controller further comprises a power conversion module, an input end of the power conversion module is externally connected with an alternating current/direct current voltage source, and an output end of the power conversion module is connected with a second input end of the IGBT discharging module through the switching-on/off energy storage capacitor bank.
Preferably, the power conversion module includes: rectifier, flyback converter, BOOST converter and BUCK converter.
Preferably, the solid-state controller further comprises a state display module, and an input end of the state display module is connected to the second output end of the control module.
Preferably, the status display module comprises an indicator light and a display screen.
Preferably, the solid-state controller further comprises a communication module, an input end of the communication module is connected with a third output end of the control module, and an output end of the communication module is connected with the upper computer.
Compared with the prior art, the beneficial effect that this disclosure brought does:
1. the intelligent control method is based on the power conversion technology of the advanced solid-state switch, the parameters of the charge and discharge circuit are regulated and controlled, the operating characteristics of the opening and closing process are optimized, and the intelligent control of the permanent magnet mechanism is realized;
2. the system can automatically realize the functions of monitoring the running state and setting the parameters by utilizing a multi-monitoring-quantity negative feedback mechanism, and the external interface can also perform data interaction with equipment such as a terminal and an upper computer, so that the four-remote function of the power system is realized.
Drawings
Fig. 1 is a schematic structural diagram of a solid-state controller in a circuit breaker according to an embodiment of the present disclosure;
FIGS. 2 (a) to 2 (b) are schematic circuit diagrams of a signal processing module in the solid-state controller shown in FIG. 1; wherein, fig. 2 (a) is a band-pass filter circuit, and fig. 2 (b) is a signal amplifying circuit;
FIG. 3 is a circuit schematic of an IGBT discharging module of the solid-state controller of FIG. 1;
fig. 4 is a circuit schematic of a power conversion module in the solid state controller of fig. 1.
Detailed Description
Specific embodiments of the present disclosure will be described in detail below with reference to fig. 1 to 4. While specific embodiments of the disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It should be noted that certain terms are used throughout the description and following claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the disclosure, but is made for the purpose of illustrating the general principles of the disclosure and not for the purpose of limiting the scope of the disclosure. The scope of the disclosure is to be determined by the claims appended hereto.
For the purpose of facilitating an understanding of the embodiments of the present disclosure, the following detailed description is to be construed in conjunction with the accompanying drawings, and the various drawings are not intended to limit the embodiments of the present disclosure.
In one embodiment, as shown in fig. 1, the present disclosure provides a solid state controller comprising:
the device comprises a signal processing module, a control module and an IGBT discharging module; wherein,
the input end of the signal processing module is externally connected with the sensor, and the output end of the signal processing module is connected with the input end of the control module;
the first output end of the control module is connected with the first input end of the IGBT discharging module, and the output end of the IGBT discharging module is connected with the permanent magnet mechanism coil.
In this embodiment, the controller and the sensor are separated, the sensor and the primary device are integrated, the measured signal is transmitted to the controller in a wired or wireless transmission mode, and the controller performs feature extraction, state evaluation and fault diagnosis. Taking a common rail transit 27.5kV modular electric appliance as an example, the electric appliance is composed of a vacuum circuit breaker, a voltage transformer, a current transformer, an isolating switch and the like, and signals measured by a solid-state controller include load information, temperature, stroke displacement, charging voltage and coil current. The load information mainly comprises information such as current, voltage and the like of a main loop, is generally directly obtained by a current transformer and a voltage transformer, and is directly transmitted to the controller in a wired transmission mode; the temperature is obtained by a temperature sensor arranged on the circuit breaker, the temperature sensor generally adopts a CT power taking and wireless transmission mode and is directly bound on primary equipment; the travel displacement is mostly obtained by a linear displacement sensor, an angular displacement sensor and the like, the angular displacement sensor is arranged on a transmission shaft of a transmission mechanism of the circuit breaker, and the travel of a contact of the circuit breaker is converted by measuring a rotation angle; the charging voltage is obtained by a voltage relay, the voltage relay is generally arranged in a control box or a cabinet body together with an energy storage capacitor, the voltage relay directly measures the voltage at two ends of the energy storage capacitor and transmits voltage information to a controller in a wired transmission mode; the coil current is mainly opening and closing current, the current information is measured by a Hall sensor, and the sensor is directly connected in series in an opening and closing coil loop and is generally arranged in a control box or a cabinet body.
The solid-state controller can not only complete the functions of a traditional electromagnetic controller, but also has the functions of data interaction, running state self-sensing, closed-loop regulation and control (namely the solid-state controller can judge the running state of the circuit breaker according to the detected signal characteristics, if the running state is judged to be dangerous, the circuit breaker is turned off on the spot to protect the system, meanwhile, the controller can also adjust the detection density of the signal according to the running state, if the current equipment state is in a concerned state, the controller can promote the monitoring of the signal to further observe the equipment state, if the equipment state is reduced to be normal, the conventional monitoring density is recovered, if the equipment state is continuously deteriorated, the equipment is cut off, the closed-loop regulation and control is realized), and the like, so that the high-level intelligent control of the circuit breaker is realized. Secondly, the solid-state controller of the embodiment can realize the state perception and the fault diagnosis of the equipment through the intelligent control center, and realize the holographic perception and the digital twin of the equipment by combining the data resource and the management platform of the equipment on the upper side. Finally, the solid-state controller can be used as a convergence control gateway to be connected into an online monitoring network, and can realize a two-way communication function with an upper side and other power distribution equipment, so that the running state of the power distribution equipment can be monitored in real time, and a ubiquitous power internet of things is constructed in an information chain mode.
In another embodiment, the signal processing module includes: the input end of the band-pass filter circuit is externally connected with the sensor, and the output end of the band-pass filter circuit is connected with the signal amplification circuit.
In this embodiment, the band-pass filter circuit includes resistors R1 and R2, capacitors C1 and C2, where R1 is connected in series with C2, C1 is connected in parallel between R1 and C2, and R2 is connected in parallel between C2 and the output terminal. The band-pass filter circuit receives the original signal U i And outputting the filtered signal U 0 。
The signal amplification circuit comprises an amplifier, the positive input end of the amplifier is connected with the input end of the signal amplification circuit through a capacitor C1, a resistor R1 is arranged between the capacitor C1 and the input end of the signal amplification circuit, the other end of the resistor R1 is grounded, and the C1 is connected with a capacitor C2 in parallel; the positive input end of the amplifier is also connected with +5V voltage, and resistors R2 and R3 which are connected in series are arranged between the positive input end of the amplifier and the +5V voltage; capacitors C7 and C8 which are connected in parallel are also arranged between the positive input end of the amplifier and the +5V voltage; the reverse input end of the amplifier is connected with a resistor R4, and the other end of the R4 is connected with capacitors C3 and C4 which are connected in parallel; the output end of the amplifier is sequentially connected with a capacitor C5 and a resistor R6, the other end of the R6 is connected with the output end of the signal amplification circuit, and the C5 is connected with the capacitor C6 in parallel; a resistor R5 is arranged between the output end of the amplifier and the capacitor C5, and the other end of the R5 is connected with a resistor R4.
Under the normal working condition, the original signal is divided into analog quantity and digital quantity, wherein stroke displacement, coil current and the like are analog quantity, and the signal is mixed with interference, so that the collected original signal U is firstly subjected to interference i The interference signal is removed by band pass filtering. Meanwhile, signals output by the sensor are mostly subjected to scale reduction, the amplitude of the output signals is in the mV level, and the signals are not beneficial to signal processing and analysis, so that the signals U subjected to band-pass filtering are processed 0 The amplified signal U is output by a signal amplifying circuit 1 Thus, the filtering and amplification of the signal are completed, and the preprocessing of the signal is completed.
In another embodiment, the control module includes: and a single chip microcomputer.
In the embodiment, the single chip microcomputer is STM32f103 in model, the equipment is high in performance, low in power consumption and small in size, a characteristic extraction and fault diagnosis modular algorithm is built in, characteristic extraction can be carried out on original characteristic signals, and the state evaluation of the equipment can be carried out on the basis.
The working principle of the control module is as follows: under normal conditions, the control module is used as a central element, the control signal processing module is used for preprocessing the acquired sensing signals, feature extraction, state evaluation and fault diagnosis are carried out through a built-in algorithm of the control signal processing module, data are displayed in the state display module, and finally the communication module is controlled to upload related feature data and diagnosis results to an upper computer for diagnosis and analysis. When an external control signal comes temporarily, the control module starts the IGBT discharging module to close the opening and closing discharging loop, the opening and closing energy storage capacitor group charges the permanent magnet mechanism coil at the moment, and the breaker completes the opening/closing action after certain electromagnetic force is generated.
In another embodiment, the IGBT discharging module includes: the IGBT submodule comprises a switch tube S1, a switch tube Son2, a switch tube Soff1 and a switch tube Soff2, the current-limiting resistor submodule comprises resistors R1, R2 and R3, a collector of the switch tube Son1 is connected with an anode of a switching-on capacitor Con and an anode of the diode D1 after being connected with the R3 in series, a cathode of the diode D1 is connected with collectors of the switch tube S1 and the switch tube Soff1, an emitter of the switch tube S1 is connected with an anode of a switching-off capacitor Coff, an emitter of the switch tube Soff1 and a cathode of a coil L are respectively connected with two ends of the resistor R1, an emitter of the switch tube Soff2 is connected with a cathode of the switching-off capacitor Coff, a cathode of the switching-on capacitor Con and an emitter of the switch tube Son2, a collector of the switch tube Soff2 is connected with an emitter of the switch tube Son1 and an anode of the coil L after being connected with the R2 in series, and a collector of the switch tube Son2 is connected with a cathode of the coil L.
In this embodiment, the IGBT discharging module is mainly used to control the switching on and off of the permanent magnet mechanism switching-on and switching-off coil circuit. When no switching signal arrives, S1 is always conducted. After a switching-on driving signal of the singlechip arrives, two IGBT devices of Son1 and Son2 are conducted, and a switching-on capacitor Con discharges electricity to a switching-off and switching-on coil L to enable the coil to generate forward current, so that switching-on operation is realized. After a brake-separating driving signal of the single chip microcomputer arrives, the two IGBT devices Soff1 and Soff2 are conducted, and the brake-separating capacitor Coff discharges electricity to the brake-separating and closing coil L to enable the coil to generate negative current, so that brake-separating operation is achieved. After a switching signal and a switching-off signal of the single chip microcomputer arrive at the same time, S1 is closed, two IGBT devices Soff1 and Soff2 are conducted, a switching-on capacitor Con replaces a switching-off capacitor Coff to discharge electricity to a switching-on and switching-off coil L to enable the coil to generate negative current, and therefore switching-off operation is achieved.
In another embodiment, the solid-state controller further comprises a power conversion module, an input end of the power conversion module is externally connected with an alternating current/direct current voltage source, and an output end of the power conversion module is connected with a second input end of the IGBT discharging module through the switching-on/off energy storage capacitor bank.
In this embodiment, the power conversion module includes a rectifier, a Flyback converter, a BOOST converter, and a BUCK converter, where the rectifier is externally connected with 220V (+ -10%) ac/dc voltage, the ac/dc voltage outputs 200V to 350V dc voltage through the rectifier, an output terminal of the rectifier is connected to an input terminal of the Flyback converter, and the Flyback converter converts the dc voltage in a range from 200V to 350V into two mutually isolated 20V voltages, which respectively supply power to the BOOST converter and the BUCK converter in an auxiliary manner. Meanwhile, the output end of the rectifier is also connected with the input end of the BOOST converter, after the BOOST comes, the BOOST starts to work, and the direct-current voltage in the range of 200V to 350V is converted into the range of 280V to 350V (boosting process). The output end of the BOOST converter is connected to the input end of the BUCK converter, the BUCK converter starts to work after the auxiliary power supply comes, and the capacitor is charged to 220V (voltage reduction process) from 0V in 15s with constant current under the condition of 280V to 350V of input voltage, so that the power conversion is completed. The switching-off capacitor is formed by connecting 3 capacitors with the capacitance value of 33mf and the withstand voltage of 300V in parallel, and the switching-on capacitor is formed by 1 capacitor with the capacitance value of 5.6mf and the withstand voltage of 300V.
It should be noted that the rectifier, flyback converter, BOOST converter and BUCK converter described above are all conventional devices, and there is no innovation in the circuit structure, so the circuit structure of this embodiment is not described in detail.
In another embodiment, the solid-state controller further includes a state display module, and an input end of the state display module is connected to the second output end of the control module.
In this embodiment, the status display module includes an indicator light and a display screen.
In another embodiment, the solid-state controller further comprises a communication module, an input end of the communication module is connected with a third output end of the control module, and an output end of the communication module is connected with the upper computer.
In this embodiment, the communication module adopts RJ45 network port communication, and the communication protocol adopts Modbus-RTU. Under normal conditions, the control module uploads the signal characteristic value obtained after the signal processing module processes to the upper computer through the communication module for diagnosis, and meanwhile, the upper computer transfers the diagnosis result and the control instruction through the communication module, so that the control protection of the circuit breaker equipment is realized.
The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.
Claims (9)
1. A solid state controller in a circuit breaker, comprising: the device comprises a signal processing module, a control module and an IGBT discharging module; wherein,
the input end of the signal processing module is externally connected with the sensor, and the output end of the signal processing module is connected with the input end of the control module;
the first output end of the control module is connected with the first input end of the IGBT discharging module, and the output end of the IGBT discharging module is connected with the permanent magnet mechanism coil.
2. The solid state controller of claim 1, wherein the signal processing module comprises: the input end of the band-pass filter circuit is externally connected with the sensor, and the output end of the band-pass filter circuit is connected with the signal amplification circuit.
3. The solid state controller of claim 1, wherein the control module comprises: and a single chip microcomputer.
4. The solid-state controller of claim 1, wherein the IGBT discharging module comprises: IGBT submodule, resistance submodule and diode.
5. The solid-state controller according to claim 1, further comprising a power conversion module, wherein an input end of the power conversion module is externally connected with an alternating current/direct current voltage source, and an output end of the power conversion module is connected with the second input end of the IGBT discharging module through the switching-closing energy storage capacitor bank.
6. The solid state controller of claim 5, wherein the power conversion module comprises: rectifier, flyback converter, BOOST converter and BUCK converter.
7. The solid state controller of claim 1, further comprising a status demonstration module, an input of the status demonstration module being connected to the second output of the control module.
8. The solid state controller of claim 7, wherein the status presentation module comprises an indicator light and a display screen.
9. The solid-state controller according to claim 1, further comprising a communication module, wherein an input end of the communication module is connected to a third output end of the control module, and an output end of the communication module is connected to the upper computer.
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| CN202222411100.6U CN218124397U (en) | 2022-09-09 | 2022-09-09 | Solid state controller in circuit breaker |
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| CN202222411100.6U CN218124397U (en) | 2022-09-09 | 2022-09-09 | Solid state controller in circuit breaker |
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