CN109831194B - Method and system for starting protection of solid state relay of high-power system - Google Patents
Method and system for starting protection of solid state relay of high-power system Download PDFInfo
- Publication number
- CN109831194B CN109831194B CN201811626783.9A CN201811626783A CN109831194B CN 109831194 B CN109831194 B CN 109831194B CN 201811626783 A CN201811626783 A CN 201811626783A CN 109831194 B CN109831194 B CN 109831194B
- Authority
- CN
- China
- Prior art keywords
- phase line
- voltage
- delay
- circuit
- starting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007787 solid Substances 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000004146 energy storage Methods 0.000 claims description 19
- 238000007493 shaping process Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Relay Circuits (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The application discloses a method and a system for starting protection of a solid state relay of a high-power system, wherein the method comprises the following steps: receiving a remote starting signal, and starting a voltage detection circuit arranged on an A phase line and a B phase line; when detecting the zero crossing point of the voltage on the A phase line or the B phase line, driving a thyristor of the corresponding phase line to be conducted through a driving circuit; starting a delay circuit to delay time according to the voltage zero-crossing signal of the A phase line or the B phase line; when the delay circuit reaches the preset delay time, the drive circuit drives the thyristor of the C phase line to be started, and the starting of the solid-state relay is completed; the method and the system reduce the starting impact current when the solid-state relay is provided with the rectifying load, avoid the damage of the thyristor in the solid-state relay at the starting moment, and avoid the tripping of the circuit breaker at the input end of the solid-state relay to cause the power failure of the whole system, thereby achieving the effects of protecting the circuit and the electrical system.
Description
Technical Field
The application relates to the field of power control, in particular to a method and a system for starting protection of a solid state relay of a high-power system.
Background
In a high-power system, a solid-state relay is a common remote controllable high-power distribution device, and inputs three-phase alternating current generated by a commercial power or a diesel generator set and supplied by a circuit breaker or other protective devices, wherein the load generally comprises a resistive load (such as a resistance wire, etc.), an inductive load (such as a motor, etc.), and a rectifying load (such as a switching power supply, etc.). The solid state relay is generally internally composed of a thyristor and a driving circuit and a control circuit thereof. In general, the solid state relay receives an external on/off signal through the control circuit to determine whether to turn on the internal thyristor through the driving circuit. Some solid state relays have added the voltage detection function in the control circuit, namely, not turn on the thyristor immediately after receiving the start-up signal, but turn on the thyristor again or gradually increase the conduction angle of the thyristor after detecting the phase voltage zero crossing point, thus realizing slow power-up. The method is suitable for the case that the solid state relay is provided with a resistive or inductive load, but is not suitable for the slow start of the rectifying load. The rectifier load is mainly used for charging the energy storage capacitor through the line voltage of a certain two phases when the rectifier load is started, the line voltage value is still higher at the zero crossing point of the phase voltage, and the large impact current is still caused by the conduction of the thyristor in the solid state relay.
Disclosure of Invention
In order to solve the problem that the thyristor in the solid-state relay is damaged due to larger impact current caused by the slow start method even if the slow start method is used for the rectifying load in the background art, the application provides a method and a system for starting the solid-state relay of a high-power system, which realize the accurate control of the conduction moment of the thyristor in the solid-state relay by detecting the zero crossing point of the voltage of a three-phase alternating current input line and conduct the thyristor in the last phase after the rectifying load is charged by a delay circuit; the method for starting and protecting the solid-state relay of the high-power system comprises the following steps:
receiving a remote starting signal, and starting a voltage detection circuit arranged on an A phase line and a B phase line;
when detecting the zero crossing point of the voltage on the A phase line or the B phase line, driving a thyristor of the corresponding phase line to be conducted through a driving circuit;
starting a delay circuit to delay time according to the voltage zero-crossing signal of the A phase line or the B phase line;
when the delay circuit reaches the preset delay time, the drive circuit drives the thyristor of the C phase line to be started, and the starting of the solid-state relay is completed.
Further, when the voltage zero crossing points on the a-phase line and the B-phase line are detected, the method further comprises:
when detecting the zero crossing point of the voltage on the A phase line or the B phase line, starting a monostable trigger; the monostable trigger receives the voltage of the corresponding phase line, after pulse shaping, the pulse shaped voltage is sent to the input end of the driving circuit, and the thyristor of the corresponding phase line is driven to be conducted through the driving circuit.
Further, the driving the thyristors corresponding to the phase lines through the driving circuit to be conducted includes:
the voltage signal received by the driving circuit is changed from low to high;
and when the voltage signal reaches a driving voltage threshold value of the driving circuit, the driving circuit drives the thyristor of the corresponding phase line to be conducted.
Further, when the load connected with the solid-state relay is a rectifying load, after the thyristors of the A phase line and the thyristors of the B phase line are driven to be conducted by the driving circuit, the energy storage capacitors with the A phase line voltage and the B phase line voltage as the rectifying load are charged;
starting the delay circuit to delay and time when starting charging; the delay time is longer than the charging time for charging the energy storage capacitor of the rectifying load;
when the delay time is reached, the energy storage capacitor of the rectifying load is charged, the drive circuit drives the thyristor of the C phase line to be started, and the starting of the solid state relay is completed.
Further, the voltage detection circuit detects voltages of the A phase line and the B phase line in real time;
when the voltage of the phase A line and the voltage of the phase B line reach steady states, a delay stopping instruction is sent to the delay circuit;
and the delay circuit stops delay timing, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
The high-power system solid state relay starting protection system comprises:
the voltage detection unit comprises a voltage detection circuit, and is used for receiving a remote starting signal and starting the voltage detection circuits arranged on the A phase line and the B phase line;
the driving unit comprises a driving circuit, and when the voltage detection unit detects the zero crossing point of the voltage on the A phase line or the B phase line, the driving unit receives a corresponding driving instruction sent by the voltage detection unit and drives the thyristor of the corresponding phase line to be conducted through the driving circuit;
the delay unit comprises a delay circuit, and when the voltage detection unit detects the zero crossing point of the voltage on the A phase line or the B phase line, the delay unit receives a corresponding delay instruction sent by the voltage detection unit and starts the delay circuit to delay and time;
when the delay time of the delay unit reaches the preset delay time, the drive unit is supposed to send a C-phase line drive instruction, and the drive unit drives a thyristor of the C-phase line to be started so as to finish the starting of the solid-state relay.
Further, the system further comprises a pulse shaping unit; the pulse shaping unit comprises a monostable trigger;
when the voltage detection unit detects the zero crossing point of the voltage on the A phase line or the B phase line, the voltage of the corresponding phase line is input into a monostable trigger of the pulse shaping unit, the monostable trigger receives the voltage of the corresponding phase line, after pulse shaping, the pulse shaped voltage is sent to the input end of a driving circuit of the driving unit, and a thyristor of the corresponding phase line is driven to be conducted through the driving circuit.
Further, the voltage signal received by the driving circuit is changed from low to high;
and when the voltage signal reaches a driving voltage threshold value of the driving circuit, the driving circuit drives the thyristor of the corresponding phase line to be conducted.
Further, when the load connected with the solid-state relay is a rectifying load, after the drive circuit drives the thyristors of the A phase line and the thyristors of the B phase line to be conducted, the energy storage capacitors with the A phase line voltage and the B phase line voltage as the rectifying load are charged;
the delay circuit carries out delay timing when charging is started; the delay time is longer than the charging time for charging the energy storage capacitor of the rectifying load;
and when the delay time is reached, the energy storage capacitor of the rectifying load is charged, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
Further, the voltage detection circuit detects voltages of the A phase line and the B phase line in real time;
when the voltage of the phase A line and the voltage of the phase B line reach steady states, a delay stopping instruction is sent to the delay circuit;
and the delay circuit stops delay timing, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
The beneficial effects of the application are as follows: the technical scheme of the application provides a method and a system for starting and protecting a solid-state relay of a high-power system, wherein the method and the system realize accurate control of the conduction moment of a thyristor in the solid-state relay through detecting the zero crossing point of the voltage of a three-phase alternating-current input line; the method and the system conduct the corresponding two-phase thyristors after detecting the zero crossing point of the line voltage so as to reduce the impact current in the charging process of the rectifying load, and conduct the last-phase thyristors after the charging of the rectifying load is completed through a delay circuit; the method and the system reduce the starting impact current when the solid state relay is provided with the rectifying load, avoid the damage of the thyristor in the solid state relay at the starting moment, and avoid the tripping of the circuit breaker at the input end of the solid state relay to cause the power failure of the whole system; the method and the system reduce the interference to the power grid when the power system is started, not only provide overvoltage and overcurrent circuit protection for the high-power system, but also reduce the instant current impact damage of each component in the electrical system when the power system is started, achieve the effect of protecting the circuit and the electrical system, and avoid the hidden trouble of motor damage caused by heat accumulation caused by excessive current.
Drawings
Exemplary embodiments of the present application may be more completely understood in consideration of the following drawings:
FIG. 1 is a flow chart of a method for protecting the start of a solid state relay of a high power system according to an embodiment of the present application;
fig. 2 is a block diagram of a high power system solid state relay start protection system according to an embodiment of the present application.
Detailed Description
The exemplary embodiments of the present application will now be described with reference to the accompanying drawings, however, the present application may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present application and fully convey the scope of the application to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the application. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
FIG. 1 is a flow chart of a method for protecting the start of a solid state relay of a high power system according to an embodiment of the present application; as shown in fig. 1, the method includes:
step 110, receiving a remote start-up signal, and starting a voltage detection circuit arranged on an A phase line and a B phase line;
the a phase line and the B phase line in this embodiment are not particularly limited, and are any two phase lines in the three-phase circuit, and the C phase line is another phase line;
the voltage detection circuit is used for detecting voltage signals of the A phase line and the B phase line, and in the embodiment, the detection of the voltage detection circuit comprises the detection of zero crossing points and the detection of steady state;
step 120, when detecting the zero crossing point of the voltage on the A phase line or the B phase line, driving a thyristor of the corresponding phase line to be conducted through a driving circuit;
further, since the voltage on the a-phase line or the B-phase line may have a sharp or burr, in order to ensure the stability of the driving circuit, before sending the signal to the driving circuit, the method further comprises:
when detecting the zero crossing point of the voltage on the A phase line or the B phase line, starting a monostable trigger; the monostable trigger receives the voltage of the corresponding phase line, after pulse shaping, the pulse shaped voltage is sent to the input end of the driving circuit, and the thyristor of the corresponding phase line is driven to be conducted through the driving circuit.
Further, the voltage signal received by the driving circuit is changed from low to high;
when the voltage signal reaches the driving voltage threshold of the driving circuit, the driving circuit drives the thyristor corresponding to the phase line to conduct so as to ensure slow starting of the thyristor.
Step 130, starting a delay circuit to delay time according to the voltage zero-crossing signal of the A phase line or the B phase line;
the starting of the delay circuit can be carried out according to the signal of the phase A line or the phase B line, which finally reaches the zero crossing point, as a starting signal.
And 140, when the delay circuit reaches the preset delay time, the drive circuit drives the thyristor of the C phase line to be started, and the starting of the solid-state relay is completed.
Further, the load connected with the solid state relay can be a resistive load, an inductive load and a rectifying load;
when the load connected with the solid-state relay is a rectifying load:
after the thyristors of the A phase line and the thyristors of the B phase line are driven by the driving circuit to be conducted, the energy storage capacitors with the A phase line voltage and the B phase line voltage as rectifier loads are charged;
starting the delay circuit to delay and time when starting charging; the delay time is longer than the charging time for charging the energy storage capacitor of the rectifying load;
when the delay time is reached, the energy storage capacitor of the rectifying load is charged, the drive circuit drives the thyristor of the C phase line to be started, and the starting of the solid state relay is completed.
Further, the voltage detection circuit detects voltages of the A phase line and the B phase line in real time;
when the voltage of the phase A line and the voltage of the phase B line reach steady states, a delay stopping instruction is sent to the delay circuit;
and the delay circuit stops delay timing, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
Fig. 2 is a block diagram of a solid state relay start protection system of a high power system according to an embodiment of the present application, as shown in fig. 2, the system includes:
the voltage detection unit 210, the voltage detection unit 210 includes a voltage detection circuit, the voltage detection unit 210 is configured to receive a remote start-up signal and start the voltage detection circuits disposed on the a-phase line and the B-phase line;
the driving unit 220, the driving unit 220 includes a driving circuit, when the voltage detecting unit 210 detects that the voltage on the a-phase line or the B-phase line crosses the zero point, the driving unit 220 receives a corresponding driving instruction sent by the voltage detecting unit 210, and drives the thyristors of the corresponding phase lines to be turned on through the driving circuit;
further, the voltage signal received by the driving circuit is changed from low to high;
and when the voltage signal reaches a driving voltage threshold value of the driving circuit, the driving circuit drives the thyristor of the corresponding phase line to be conducted.
The delay unit 230, where the delay unit 230 includes a delay circuit, and when the voltage detection unit 210 detects that the voltage on the a-phase line or the B-phase line crosses a zero point, the delay unit 230 receives a corresponding delay instruction sent by the voltage detection unit 210, and starts the delay circuit to perform delay timing;
when the delay time of the delay unit 230 reaches the preset delay time, the driving unit 220 is supposed to send a C-phase line driving instruction, and the driving unit 220 drives the thyristor of the C-phase line to be turned on, so as to complete the start of the solid state relay.
Further, the system further comprises a pulse shaping unit 240; the pulse shaping unit 240 comprises a monostable flip-flop;
when the voltage detection unit 210 detects the zero crossing point of the voltage on the a phase line or the B phase line, the voltage of the corresponding phase line is input to the monostable trigger of the pulse shaping unit 240, the monostable trigger receives the voltage of the corresponding phase line, after pulse shaping, the pulse shaped voltage is sent to the input end of the driving circuit of the driving unit 220, and the thyristor of the corresponding phase line is driven to be turned on by the driving circuit.
Further, when the load connected with the solid-state relay is a rectifying load, after the drive circuit drives the thyristors of the A phase line and the thyristors of the B phase line to be conducted, the energy storage capacitors with the A phase line voltage and the B phase line voltage as the rectifying load are charged;
the delay circuit carries out delay timing when charging is started; the delay time is longer than the charging time for charging the energy storage capacitor of the rectifying load;
and when the delay time is reached, the energy storage capacitor of the rectifying load is charged, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
Further, the voltage detection circuit detects voltages of the A phase line and the B phase line in real time;
when the voltage of the phase A line and the voltage of the phase B line reach steady states, a delay stopping instruction is sent to the delay circuit;
and the delay circuit stops delay timing, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Reference to step numbers in this specification is used solely to distinguish between steps and is not intended to limit the time or logical relationship between steps, including the various possible conditions unless the context clearly indicates otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the disclosure and form different embodiments. For example, any of the embodiments claimed in the claims may be used in any combination.
Various component embodiments of the present disclosure may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. The present disclosure may also be implemented as an apparatus or system program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present disclosure may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the disclosure, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The disclosure may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware.
The foregoing is merely a specific embodiment of the disclosure, and it should be noted that it will be apparent to those skilled in the art that various improvements, modifications, and variations can be made without departing from the spirit of the disclosure, and such improvements, modifications, and variations are considered to be within the scope of the application.
Claims (8)
1. A method for protecting the start-up of a solid state relay of a high power system, the method comprising:
receiving a remote starting signal, and starting a voltage detection circuit arranged on an A phase line and a B phase line;
when detecting the zero crossing point of the voltage on the A phase line or the B phase line, driving a thyristor of the corresponding phase line to be conducted through a driving circuit;
starting a delay circuit to delay time according to the voltage zero-crossing signal of the A phase line or the B phase line;
when the delay circuit reaches the preset delay time, the drive circuit drives the thyristor of the C phase line to be started, and the starting of the solid-state relay is completed;
when the load connected with the solid-state relay is a rectifying load, after the thyristors of the A phase line and the thyristors of the B phase line are driven by the driving circuit to be conducted, the voltage of the A phase line and the voltage of the B phase line are used as energy storage capacitors of the rectifying load to charge;
starting the delay circuit to delay and time when starting charging; the delay time is longer than the charging time for charging the energy storage capacitor of the rectifying load;
when the delay time is reached, the energy storage capacitor of the rectifying load is charged, the drive circuit drives the thyristor of the C phase line to be started, and the solid state relay is started;
the A phase line and the B phase line are any two phase lines in a three-phase circuit, and the C phase line is another phase line.
2. The method of claim 1, wherein when a voltage zero crossing on the a-phase line and the B-phase line is detected, the method further comprises:
when detecting the zero crossing point of the voltage on the A phase line or the B phase line, starting a monostable trigger;
the monostable trigger receives the voltage of the corresponding phase line, after pulse shaping, the pulse shaped voltage is sent to the input end of the driving circuit, and the thyristor of the corresponding phase line is driven to be conducted through the driving circuit.
3. A method according to claim 1 or 2, wherein driving the thyristors of the respective phase lines through the drive circuit comprises:
the voltage signal received by the driving circuit is changed from low to high;
and when the voltage signal reaches a driving voltage threshold value of the driving circuit, the driving circuit drives the thyristor of the corresponding phase line to be conducted.
4. The method according to claim 1, characterized in that:
the voltage detection circuit detects the voltages of the A phase line and the B phase line in real time;
when the voltage of the phase A line and the voltage of the phase B line reach steady states, a delay stopping instruction is sent to the delay circuit;
and the delay circuit stops delay timing, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
5. A high power system solid state relay start-up protection system, the system comprising:
the voltage detection unit comprises a voltage detection circuit, and is used for receiving a remote starting signal and starting the voltage detection circuits arranged on the A phase line and the B phase line;
the driving unit comprises a driving circuit, and when the voltage detection unit detects the zero crossing point of the voltage on the A phase line or the B phase line, the driving unit receives a corresponding driving instruction sent by the voltage detection unit and drives the thyristor of the corresponding phase line to be conducted through the driving circuit;
the delay unit comprises a delay circuit, and when the voltage detection unit detects the zero crossing point of the voltage on the A phase line or the B phase line, the delay unit receives a corresponding delay instruction sent by the voltage detection unit and starts the delay circuit to delay and time;
when the delay time of the delay unit reaches the preset delay time, the drive unit is supposed to send a C-phase line drive instruction, and the drive unit drives a thyristor of the C-phase line to be started so as to finish the starting of the solid-state relay;
when the load connected with the solid-state relay is a rectifying load, after the thyristors of the A phase line and the thyristors of the B phase line are driven by the driving circuit to be conducted, the voltage of the A phase line and the voltage of the B phase line are used as energy storage capacitors of the rectifying load to charge;
starting the delay circuit to delay and time when starting charging; the delay time is longer than the charging time for charging the energy storage capacitor of the rectifying load;
when the delay time is reached, the energy storage capacitor of the rectifying load is charged, the drive circuit drives the thyristor of the C phase line to be started, and the solid state relay is started;
the A phase line and the B phase line are any two phase lines in a three-phase circuit, and the C phase line is another phase line.
6. The system according to claim 5, wherein: the system further comprises a pulse shaping unit; the pulse shaping unit comprises a monostable trigger;
when the voltage detection unit detects the zero crossing point of the voltage on the A phase line or the B phase line, the voltage of the corresponding phase line is input into a monostable trigger of the pulse shaping unit, the monostable trigger receives the voltage of the corresponding phase line, after pulse shaping, the pulse shaped voltage is sent to the input end of a driving circuit of the driving unit, and a thyristor of the corresponding phase line is driven to be conducted through the driving circuit.
7. The system according to claim 5 or 6, characterized in that:
the voltage signal received by the driving circuit is changed from low to high;
and when the voltage signal reaches a driving voltage threshold value of the driving circuit, the driving circuit drives the thyristor of the corresponding phase line to be conducted.
8. The system according to claim 5, wherein:
the voltage detection circuit detects the voltages of the A phase line and the B phase line in real time;
when the voltage of the phase A line and the voltage of the phase B line reach steady states, a delay stopping instruction is sent to the delay circuit;
and the delay circuit stops delay timing, and the drive circuit drives the thyristor of the C phase line to be started so as to finish the starting of the solid-state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811626783.9A CN109831194B (en) | 2018-12-28 | 2018-12-28 | Method and system for starting protection of solid state relay of high-power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811626783.9A CN109831194B (en) | 2018-12-28 | 2018-12-28 | Method and system for starting protection of solid state relay of high-power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109831194A CN109831194A (en) | 2019-05-31 |
| CN109831194B true CN109831194B (en) | 2023-12-12 |
Family
ID=66861312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811626783.9A Active CN109831194B (en) | 2018-12-28 | 2018-12-28 | Method and system for starting protection of solid state relay of high-power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109831194B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152428B (en) * | 2020-09-30 | 2022-06-07 | 科华恒盛股份有限公司 | Three-phase thyristor control circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006166650A (en) * | 2004-12-09 | 2006-06-22 | Mitsubishi Electric Corp | Controller for thyristor converter |
| CN2814758Y (en) * | 2005-06-15 | 2006-09-06 | 河北师范大学 | Three-phase asynchronous motor open-phase in stantaneous overload delay protector |
| CN101582590A (en) * | 2008-05-13 | 2009-11-18 | 北京馨容纵横科技发展有限公司 | Zero passage triggering time-oriented sequential control circuit of 2-control 3-type thyristor switching capacitor |
| CN103745883A (en) * | 2014-01-08 | 2014-04-23 | 辽宁工程技术大学 | Combined type arc-free alternating-current (AC) contactor with function of thyristor fault diagnosis |
| CN104410293A (en) * | 2014-12-12 | 2015-03-11 | 中冶南方（武汉）自动化有限公司 | Delay-compensation-based multi-pulse thyristor trigger control method |
| CN104659739A (en) * | 2015-02-06 | 2015-05-27 | 广东南冠电气有限公司 | Circuit breaker with neutral line fault default phase protection function |
| CN106357132A (en) * | 2015-07-22 | 2017-01-25 | 力博特公司 | Control method and equipment of three-phase three-wire rectifying circuit |
-
2018
- 2018-12-28 CN CN201811626783.9A patent/CN109831194B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006166650A (en) * | 2004-12-09 | 2006-06-22 | Mitsubishi Electric Corp | Controller for thyristor converter |
| CN2814758Y (en) * | 2005-06-15 | 2006-09-06 | 河北师范大学 | Three-phase asynchronous motor open-phase in stantaneous overload delay protector |
| CN101582590A (en) * | 2008-05-13 | 2009-11-18 | 北京馨容纵横科技发展有限公司 | Zero passage triggering time-oriented sequential control circuit of 2-control 3-type thyristor switching capacitor |
| CN103745883A (en) * | 2014-01-08 | 2014-04-23 | 辽宁工程技术大学 | Combined type arc-free alternating-current (AC) contactor with function of thyristor fault diagnosis |
| CN104410293A (en) * | 2014-12-12 | 2015-03-11 | 中冶南方（武汉）自动化有限公司 | Delay-compensation-based multi-pulse thyristor trigger control method |
| CN104659739A (en) * | 2015-02-06 | 2015-05-27 | 广东南冠电气有限公司 | Circuit breaker with neutral line fault default phase protection function |
| CN106357132A (en) * | 2015-07-22 | 2017-01-25 | 力博特公司 | Control method and equipment of three-phase three-wire rectifying circuit |
Non-Patent Citations (1)
| Title |
|---|
| 刘卫星.三相无功不平衡系统动态补偿 控制技术研究.中国知网.2010,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109831194A (en) | 2019-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9800171B2 (en) | Protection system for DC power transmission system, AC-DC converter, and method of interrupting DC power transmission system | |
| Liu et al. | Solid-state circuit breaker snubber design for transient overvoltage suppression at bus fault interruption in low-voltage DC microgrid | |
| US9553533B2 (en) | DC pre charge circuit | |
| US8045309B2 (en) | Magnetic energy recovery switch having protective circuit | |
| EP3736964B1 (en) | Method for controlling shutdown wave blocking of multilevel inverter circuit and application apparatus thereof | |
| US10622933B2 (en) | Inverter device that reduces a loss caused by switching elements | |
| KR101910303B1 (en) | Charging circuit and mobile terminal | |
| EP3910777A1 (en) | Boost circuit and control method for boost circuit | |
| CN105580233A (en) | Inrush current limiting circuit and power conversion device | |
| US10630219B2 (en) | Drive circuit for electric motors | |
| CN109831194B (en) | Method and system for starting protection of solid state relay of high-power system | |
| US20110170218A1 (en) | Power supply system for an element, among a rotor and a stator of an electric machine, and method for controlling such system | |
| CN109217273B (en) | Non-delay anti-surge circuit for closing power switch | |
| Yu et al. | A new thyristor DC solid-state circuit breaker capable of performing operating duty | |
| CN104584355A (en) | Method for driving active bridge rectifier in the event of load shedding, rectifier arrangement and computer program product | |
| CN107370354B (en) | A kind of AC input current Surge suppression system | |
| CN102694368A (en) | Shorting protection for systems having electric machines | |
| US11394200B2 (en) | Device and method for coupling two DC grids | |
| CN201181471Y (en) | Apparatus for implementing server fan hot-plug | |
| CN210201543U (en) | Charging circuit for improving reliability and photovoltaic air conditioning equipment | |
| CN209748404U (en) | Three-phase rectification protection circuit with input surge current suppression function | |
| CN102195265A (en) | Device and method for protecting an electrical consumer against voltage spikes in a motor vehicle | |
| CN207368642U (en) | Overvoltage protection circuit for switching power supply bus | |
| CN111130063A (en) | Controller | |
| US9979279B2 (en) | DC-DC converter input voltage high-energy transient clamping topology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |