CN214674348U - Plasma ignition power supply system - Google Patents
Plasma ignition power supply system Download PDFInfo
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- CN214674348U CN214674348U CN202120858396.9U CN202120858396U CN214674348U CN 214674348 U CN214674348 U CN 214674348U CN 202120858396 U CN202120858396 U CN 202120858396U CN 214674348 U CN214674348 U CN 214674348U
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- speed regulator
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Abstract
The application relates to a plasma ignition power supply system, belongs to plasma ignition technical field, and the system of this application includes: the system comprises an alternating current contactor, a direct current speed regulator, a PLC (programmable logic controller) and an output end filter; the three-phase alternating current from the isolation transformer is connected to an input interface of the direct current speed regulator through the alternating current contactor; the positive output interface of the direct current speed regulator is connected to the anode part of the plasma generating device through the output end filter, and the negative output interface of the direct current speed regulator is connected to the cathode part of the plasma generating device through the output end filter; the PLC is connected with the direct current speed regulator through a communication protocol. The current supply device can provide more stable current for the device.
Description
Technical Field
The application belongs to the technical field of plasma ignition, and particularly relates to a plasma ignition power supply system.
Background
The plasma generator has wide application in high temperature heat source, especially magnetically stable air carrier plasma generator with cathode part, anode part, power supply system, cooling water system, compressed air system, etc. The cathode part of the plasma generating device is made of a high-conductivity metal material or a non-metal material, and the anode part is made of a high-conductivity, high-heat-conductivity and oxidation-resistant metal material. The principle of plasma ignition is that direct current is used for arc striking under the condition of a certain medium air pressure, and directional flowing plasma with stable power is obtained under the control of a strong magnetic field.
In the above structure of the plasma generator, the power supply system bears the burden of providing stable current for the plasma generator, and the power, efficiency, stability and operation characteristics of the plasma generator greatly depend on the relevant characteristics of the power supply system, which directly determines whether the plasma generator can operate normally and stably.
In the prior art, the current provided by a plasma ignition power supply system has the problem of noise interference, and the stable operation of the device is easily influenced.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
To overcome, at least to some extent, the problems of the related art, the present application provides a plasma ignition power supply system that helps to provide a more stable current to the device.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the present application provides a plasma ignition power supply system, the system comprising: the system comprises an alternating current contactor, a direct current speed regulator, a PLC (programmable logic controller) and an output end filter; wherein the content of the first and second substances,
the three-phase alternating current from the isolation transformer is connected to an input interface of the direct current speed regulator through the alternating current contactor;
the positive output interface of the direct current speed regulator is connected to the anode part of the plasma generating device through the output end filter, and the negative output interface of the direct current speed regulator is connected to the cathode part of the plasma generating device through the output end filter;
the PLC is connected with the direct current speed regulator through a communication protocol.
Optionally, a reactor is connected to a line between the positive output interface of the dc speed regulator and the output filter.
Optionally, a shunt for current sensing is connected to a line between the positive output interface of the dc speed regulator and the reactor.
Optionally, a voltage meter for sensing voltage is further connected to a line close to the output end filter and between the positive output interface and the negative output interface of the dc speed regulator.
Optionally, a fuse is disposed on an input line of the ac contactor, and the three-phase ac power from the isolation transformer is connected to the ac contactor through the fuse.
Optionally, a power interface of the dc speed regulator is connected to a line between the fuse and the ac contactor to obtain a working current of the speed regulator, and a first air switch is disposed between the power interface and the line.
Optionally, the plasma ignition power supply system further comprises a heat radiation fan;
and a power supply interface of the cooling fan is connected to a line between the alternating current contactor and an input interface of the direct current speed regulator, and a second air switch is arranged between the power supply interface and the line.
Optionally, the output filter is a single-phase two-stage general filter.
Optionally, the dc governor is model emerson MP420a 4.
Optionally, the PLC controller is of a Siemens S7-200 type.
This application adopts above technical scheme, possesses following beneficial effect at least:
by adopting the power supply system based on the DC speed regulator and arranging the output end filter at the output port of the DC speed regulator, clutter interference can be effectively removed, and more stable current is provided for the device.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technology or prior art of the present application and are incorporated in and constitute a part of this specification. The drawings expressing the embodiments of the present application are used for explaining the technical solutions of the present application, and should not be construed as limiting the technical solutions of the present application.
FIG. 1 is an electrical schematic diagram of a plasma ignition power supply system provided in accordance with one embodiment of the present application;
fig. 2 is an electrical schematic diagram of a main circuit portion of a plasma ignition power supply system according to an embodiment of the present application.
In the figure, 1-ac contactor; 2-a direct current speed regulator; 3-a PLC controller; 4-output end filter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
As described in the background art, in a plasma generator, a power supply system bears a burden of supplying a stable current to the plasma generator, and the power, efficiency, stability and operation characteristics of the plasma generator greatly depend on the relevant characteristics of the power supply system, which directly determines whether the plasma generator can be operated normally and stably.
In the prior art, the current provided by a plasma ignition power supply system has the problem of noise interference, and the stable operation of the device is easily influenced. The application provides a plasma ignition power supply system aiming at the defects of a power supply system in a plasma generating device in the prior art.
Example one
As shown in fig. 1, in this embodiment, the plasma ignition power supply system in the present application includes: the device comprises an alternating current contactor 1, a direct current speed regulator 2, a PLC 3 and an output end filter 4;
as shown in fig. 1, in this embodiment, three-phase ac power from an isolation transformer (A, B, C in fig. 1 is a three-phase terminal of the isolation transformer) is connected to an input interface (interfaces shown as U1, V1 and W1 in fig. 1) of a dc speed regulator 2 through an ac contactor 1;
in this embodiment, the positive output interface of the dc speed regulator 2 is connected to the anode component of the plasma generation device through the output filter, and the negative output interface of the dc speed regulator 2 is connected to the cathode component of the plasma generation device through the output filter, that is, the positive output interface (in fig. 1, "+") and the negative output interface (in fig. 1, "-") of the dc speed regulator 2 are correspondingly connected to the anode component and the cathode component of the plasma generation device through the output filter 4, respectively (the right side terminal in fig. 1 is the terminal of the cathode-anode component);
the PLC 3 is connected with the DC speed regulator 2 through a communication protocol.
The power supply system is applied in practice in the following general process that an alternating current contactor is triggered to be closed, a main circuit is connected, a direct current speed regulator outputs required arc discharge current under the control of a PLC controller, the current is output to a cathode part and an anode part of the device through an output end filter, under the condition that the cathode part and the anode part are in short circuit and are gradually separated, electric arcs are generated in the environment of medium gas, and then directional flowing plasma with stable power is obtained through strong magnetic field control, so that ignition of the directional flowing plasma on target substances (such as fuel coal of a power plant boiler) is realized.
It should be noted that, in the above process, the related program method related to the PLC controller controlling the dc speed regulator belongs to the prior art, and the above description of the present application is only for the purpose of illustration of this embodiment, and does not relate to the improvement of the related control method.
This application is through adopting the electrical power generating system based on DC speed regulator, and sets up output filter at DC speed regulator output port, can effectively get rid of the clutter and disturb, provides more stable electric current for plasma ignition device.
To facilitate understanding of the technical solutions of the present application, the technical solutions of the present application will be described below with reference to example 2.
Example 2
As shown in fig. 2, in this embodiment, the plasma ignition power supply system includes: an alternating current contactor Q1, a direct current speed regulator TSQ1, a PLC controller (not shown in the figure) and an output end filter LB;
in this embodiment, the output filter LB is a single-phase two-stage general filter; for example, the model of the single-phase two-stage general filter is SJD 410420430 series, and the filter adopts a two-stage common-mode filter design, and has excellent common-mode and differential-mode filtering effects, and the effective filtering range is 5KHz-30 MHz.
As shown in fig. 2, in this embodiment, three-phase ac power from the isolation transformer (A, B, C in fig. 1 is the three-phase terminal of the isolation transformer, for example, the isolation transformer has a capacity of 200KVA and an output of 380VAC/50Hz) is connected to the input interface (ports shown as U1, V1, and W1 in fig. 1) of the dc speed regulator through an ac contactor Q1 (breaking capacity of 300A);
in this embodiment, in order to ensure electrical safety, fuses F01, F02, and F03 are provided on an input line of the ac contactor Q1, and the three-phase ac power from the isolation transformer is connected to the ac contactor Q1 through the fuses.
In this embodiment, similar to the previous embodiment, the positive output interface (1C 1 in fig. 2) and the negative output interface (1D 1 in fig. 2) of the dc speed regulator are respectively connected to the anode part and the cathode part of the device through the output end filter LB; in order to reduce the pulsation value of the output current of the direct current speed regulator, a reactor DK1 is connected to a line between an anode output interface of the direct current speed regulator and an output end filter LB, wherein the reactor DK1 is an arc stabilizing reactor with the specification of 400A/3mH, for example;
in this embodiment, in order to facilitate the display of the output current of the power supply system, as shown in fig. 2, a shunt P1 for current sensing is connected to a line between the positive output interface of the dc regulator and the reactor, for example, the shunt has a specification of 500A/75mV, the conversion from a large current to a small voltage is realized based on the shunt, and further, a current meter matched with the shunt is connected based on the shunt, so as to realize the visual display of the output current value.
In this embodiment, in order to facilitate the display of the output voltage of the power supply system, as shown in fig. 2, a voltage header P2 for voltage sensing is further connected between the positive output interface and the negative output interface of the dc speed regulator on a line near the output end filter LB to implement visual display of the output voltage value.
It should be noted that in this embodiment, the model of the dc speed regulator is emerson MP420a4, and the working power supply of the dc speed regulator needs to be separately connected.
Specifically, as shown in fig. 2, a power interface (5V 1, 5U1, 5W1 in fig. 2) of the dc governor MP420a4 is connected to a line between the fuse and the ac contactor Q1 to obtain a governor operating current, and a first air switch QF6 is disposed between the power interface and the line.
In this embodiment, the plasma ignition power supply system is implemented based on a cabinet, and in order to ensure heat dissipation of the system, a heat dissipation fan (3-M in fig. 2) is arranged in the cabinet, that is, the plasma ignition power supply system further includes a heat dissipation fan;
as shown in fig. 2, a power supply interface (2, 4, 6 of the motors 3 to M in fig. 2) of the cooling fan is connected to a line between the ac contactor and the input interface of the dc speed regulator, and a second air switch QF7 is provided between the power supply interface and the line.
Further, in order to facilitate the identification of the on-off state of the heat dissipation fan, as shown in fig. 2, the auxiliary contact of the second air switch QF7 may be connected to a digital input port (PLC-i.0 in fig. 2) of the PLC controller, so that when the QF7 is opened or closed, the auxiliary contact correspondingly acts, and thereby the PLC controller may identify the on-off state of the QF7 based on the state of the internal soft element, thereby implementing the identification of the on-off state of the heat dissipation fan.
In the embodiment, the model of the PLC is Siemens S7-200, and the PLC S7-200 is connected with a direct current governor MP420A4 through a MODBUS 485 communication protocol.
In addition, in order to ensure stability of core control devices such as the PLC controller and prevent program abnormality caused by power loss, the plasma ignition power supply system further includes a UPS power supply module (not shown in the figure), where the UPS power supply module provides a continuous operating voltage, such as a +24V operating voltage, for the PLC controller.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A plasma ignition power supply system, comprising: the system comprises an alternating current contactor, a direct current speed regulator, a PLC (programmable logic controller) and an output end filter; wherein the content of the first and second substances,
the three-phase alternating current from the isolation transformer is connected to an input interface of the direct current speed regulator through the alternating current contactor;
the positive output interface of the direct current speed regulator is connected to the anode part of the plasma generating device through the output end filter, and the negative output interface of the direct current speed regulator is connected to the cathode part of the plasma generating device through the output end filter;
the PLC is connected with the direct current speed regulator through a communication protocol;
and a reactor is connected to a line between the positive output interface of the direct current speed regulator and the output end filter.
2. The plasma ignition power supply system according to claim 1, wherein a shunt for current sensing is connected to a line between a positive output interface of the dc speed regulator and the reactor.
3. The plasma ignition power supply system according to claim 1, wherein a voltage meter for sensing voltage is further connected between the positive output interface and the negative output interface of the dc regulator on a line close to the output end filter.
4. The plasma ignition power supply system according to claim 1, wherein a fuse is provided on an input line of the ac contactor, and a three-phase ac power from an isolation transformer is connected to the ac contactor through the fuse.
5. The plasma ignition power supply system according to claim 4, wherein a power supply interface of the dc regulator is connected to a line between the fuse and the ac contactor to obtain a regulator operation current, and a first air switch is provided between the power supply interface and the line.
6. The plasma ignition power supply system of claim 4, further comprising a heat dissipation fan;
and a power supply interface of the cooling fan is connected to a line between the alternating current contactor and an input interface of the direct current speed regulator, and a second air switch is arranged between the power supply interface and the line.
7. The plasma ignition power supply system according to any one of claims 1 to 6, wherein the output-side filter is a single-phase two-stage general-type filter.
8. The plasma ignition power supply system of any one of claims 1 to 6, wherein the DC regulator is Emerson MP420A 4.
9. The plasma ignition power supply system of any one of claims 1 to 6, wherein the PLC controller is of the Siemens S7-200 model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120858396.9U CN214674348U (en) | 2021-04-23 | 2021-04-23 | Plasma ignition power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120858396.9U CN214674348U (en) | 2021-04-23 | 2021-04-23 | Plasma ignition power supply system |
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| CN214674348U true CN214674348U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909673A (en) * | 2022-05-25 | 2022-08-16 | 西安热工研究院有限公司 | Self-starting method and device of plasma ignition system based on coal-fired unit |
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2021
- 2021-04-23 CN CN202120858396.9U patent/CN214674348U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909673A (en) * | 2022-05-25 | 2022-08-16 | 西安热工研究院有限公司 | Self-starting method and device of plasma ignition system based on coal-fired unit |
| CN114909673B (en) * | 2022-05-25 | 2024-04-30 | 西安热工研究院有限公司 | Self-starting method and device for plasma ignition system based on coal-fired unit |
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