CN112583302A - Soft start control system and control method for auxiliary motor of petroleum drilling machine - Google Patents
Soft start control system and control method for auxiliary motor of petroleum drilling machine Download PDFInfo
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- CN112583302A CN112583302A CN202011585526.2A CN202011585526A CN112583302A CN 112583302 A CN112583302 A CN 112583302A CN 202011585526 A CN202011585526 A CN 202011585526A CN 112583302 A CN112583302 A CN 112583302A
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- soft start
- motor
- contactor
- relay
- soft
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 title abstract description 11
- 239000003208 petroleum Substances 0.000 title description 2
- 239000007858 starting material Substances 0.000 claims abstract description 34
- 239000003129 oil well Substances 0.000 claims description 4
- 238000011022 operating instruction Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Motor And Converter Starters (AREA)
Abstract
The invention discloses a soft start control system and a soft start control method for an auxiliary motor of an oil drilling machine. The control system comprises a wireless transmitter, a wireless receiver and a PLC (programmable logic controller), the PLC is also connected with the soft starter and the relay, and the relay controls the on-off of the soft start loop contactor and the bypass contactor; one end of the soft start loop contactor is sequentially connected in series with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1, and the other end of the soft start loop contactor is sequentially connected in series with a thermal relay and a motor; one end of the bypass contactor is connected in parallel between the soft start loop contactor and the thermal relay, and the other end of the bypass contactor is connected in parallel between the incoming line breaker Q1 and the soft start incoming line contactor KM 61. The wireless transmitter sends an operating instruction, the wireless receiver receives and processes the operating instruction and then sends the operating instruction to the PLC, and the PLC performs logic control to close and open the relay and break the relay to drive the contactor to act so as to realize the remote control of the soft start and stop of the motor, so that the operation is safe and the automation degree of the motor control is high.
Description
Technical Field
The invention belongs to the technical field of oil drilling machines, relates to a soft start control system for an auxiliary motor of an oil drilling machine, and particularly relates to a soft start control system and a soft start control method for the auxiliary motor of the oil drilling machine.
Background
When the oil drilling machine works, the soft start of the auxiliary motor is realized by the reduced-voltage start, so that the aim of smoothly starting the motor and a mechanical load is fulfilled, the influence of starting current on a power grid is reduced, and the power grid and a mechanical system are protected. In order to meet production requirements and facilitate operation, the motor is controlled in a multi-control mode in the soft starting process. At present, the common control modes include central control, machine side and cabinet control operation. The three operation modes coexist simultaneously, which brings much convenience to the control of the motor, but the control mode with the coexistence of multiple operation modes has the problems of complicated operation, manpower waste, improper coordination of multiple modes, unsafety and low automation degree.
Disclosure of Invention
The invention aims to provide a wireless remote control oil-well rig auxiliary motor soft start control system with high safety and automation degree aiming at the problems of the existing soft start control mode of the oil-well rig auxiliary motor.
The invention also aims to provide a method for controlling the soft start of the auxiliary motor of the oil drilling machine by using the system.
The purpose of the invention is realized by the following technical scheme:
a soft start control system for an auxiliary motor of an oil drilling machine comprises a wireless transmitter and a wireless receiver, wherein the wireless transmitter and the wireless receiver are communicated through wireless signals; the output end of the wireless receiver is connected with the input end of the PLC, and the input end of the PLC is also connected with the soft starter SS; the output end of the PLC is respectively connected with a relay 1 for controlling the soft start and stop of the motor and a relay 2 for controlling the bypass operation of the motor, the relay 1 controls the on-off of a soft start loop contactor, and the relay 2 controls the on-off of a bypass contactor; one end of the soft start loop contactor is sequentially connected with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1 in series, the other end of the soft start loop contactor is sequentially connected with a thermal relay and a motor in series, and a lead between the thermal relay and the motor penetrates through a current transformer; one end of the bypass contactor is connected in parallel between the soft start loop contactor and the thermal relay, and the other end of the bypass contactor is connected in parallel between the incoming line breaker Q1 and the soft start incoming line contactor KM 61.
The soft starter SS is a bypass type soft starter;
the soft starter SS can be connected with more than two groups of thermal relays and soft start loop contactors in series and is connected with the same group of bypass contactors in parallel for controlling the soft start and stop of a plurality of motors.
The invention discloses a soft start control method of an auxiliary motor of an oil drilling machine, which comprises the following steps:
s1, after the system is ready, the wireless transmitter is used for sending a start or stop signal to the motor M1 to be controlled;
s2, the wireless receiver receives the signal sent by the wireless transmitter, processes the signal and outputs a start or stop command to the PLC;
s3, the PLC receives the command, sends the output command to the corresponding relay through logic control, and the relay controls the action of the contactor to further control the starting or stopping of the motor M1, specifically:
(1) the PLC receives a starting signal of the wireless receiver and detects that a soft start loop contactor KM021-KM101 for controlling other motors M2-M10 does not work, a relay 1 for controlling the soft start and stop of the motor M1 and the soft start loop contactor KM011 are in a moving closing state, a soft starter SS works, and the motor M1 runs; within 20 seconds after the KM011 is dynamically closed, if the soft starter SS has no bypass signal output to the PLC, the relay 1 and the KM011 which control the soft start and stop of the motor M1 are dynamically disconnected, and the motor M1 stops running; if the PLC detects a bypass signal of the soft starter SS, the relay 2 for controlling the motor M1 to operate in a bypass mode is switched on, the bypass contactor KM012 is switched on, the motor M1 operates in a bypass mode, and after the KM012 is switched on for 3 seconds, the relay 1 and the KM011 for controlling the motor M1 to start and stop in a soft mode are switched off, and after the soft start is finished, the bypass works normally; soft starter SS waits for the next soft start cycle as described above;
(2) when the PLC receives a stop signal of M1 sent by the wireless receiver, no matter the system is in a soft start state or a bypass state, the relays 1 and KM011 for controlling the soft start and stop of the motor M1, the relay 2 for controlling the bypass operation of the motor M1 and the bypass contactor KM012 are all turned off, and the motor M1 stops operating.
Compared with the existing soft start control mode of the auxiliary motor of the oil drilling machine, the invention has the following beneficial effects:
1. the invention sends out an operation instruction through the start and stop keys on the wireless transmitter, the wireless receiver receives the operation instruction through the outdoor antenna of the wireless receiver, processes the operation instruction and sends the operation instruction to the PLC, the PLC sends out an output instruction to the execution relay through the logic control of the PLC, and the execution relay is moved to close and open to drive the contactor to act, so that the soft start and stop remote control operation of the motor is realized.
2. The control system is suitable for any position with the radius of 100 meters, is not influenced by obstacles, and can meet the field working condition. An operator can carry the light transmitter to freely walk at any time and any place, the operation is carried out without being influenced by the environment, and the accident potential caused by the factors such as wire control constraint, severe environment or improper command and coordination in the existing motor soft start control mode is avoided. Not only ensures safe operation, but also improves the automation degree of motor control, and greatly improves the production efficiency.
Drawings
FIG. 1 is a schematic diagram of the signal transmission process of each device in the control system of the present invention (taking the control system for controlling 10 motors as an example);
FIG. 2 is a circuit diagram of the control system of the present invention (taking the control system for controlling 10 motors as an example);
FIG. 3 is a flow chart of the control of soft start of the motor using the system of the present invention.
In the figure, Q1 is an AC400V incoming line breaker; KM61 is a soft start incoming line contactor; SS is a soft starter; KM011-KM101 is a soft start loop contactor; KM012-KM102 is a bypass contactor; KH1-KH10 are thermal relays; TA1-TA10 are current transformers; M1-M10 is a motor.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the oil-well rig auxiliary motor soft start control system provided by the invention comprises a wireless transmitter and a wireless receiver, wherein the wireless transmitter is a wireless explosion-proof transmitter F24-T, and the wireless receiver is a wireless receiver F24-R. The wireless transmitter transmits the wireless signal to the wireless receiver in a digital coding mode. The output end of the wireless receiver is connected with the input end of a PLC (central processing unit SR 60), and the input end of the PLC is also connected with a soft starter SS; the PLC output end is respectively connected with a relay 1 for controlling the soft start and stop of a motor M1 and a relay 2 for controlling the bypass operation of a motor M1, the relay 1 controls the on-off of a soft start loop contactor KM011, and the relay 2 controls the on-off of a bypass contactor KM 012; one end of a soft start loop contactor KM011 is sequentially connected in series with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1, the other end of the soft start loop contactor KM011 is sequentially connected in series with a thermal relay KH1 and a motor M1, and a lead between the thermal relay KH1 and the motor M1 penetrates through a current transformer TA 1; bypass contactor KM012 has one end connected in parallel between soft start loop contactor KM011 and thermal relay KH1, and the other end connected in parallel between incoming line breaker Q1 and soft start incoming line contactor KM 61.
Wherein, the soft starter SS is a bypass type soft starter; in the embodiment provided in fig. 1 and 2, the soft starter SS is connected in series with 10 sets of thermal relays (KH 1-KH 10) and soft start loop contactors (KM 011-KM 101) and in parallel with 10 sets of bypass contactors (KM 012-KM 102) for controlling the soft start and stop of 10 motors (M1-M10).
In fig. 2, the incoming line breaker Q1 is used for providing power supply and line total protection for a motor soft start control system, the soft start incoming line contactor KM61 is used for controlling the incoming line power supply of the soft starter, the SS of the soft starter is used for enabling the motor to achieve impact-free and smooth starting, the soft start loop contactor (KM 011-KM 101) is used for switching on/off the soft start loop, and controlling the soft start/stop of the motor (M1-M10) in a soft start state. The bypass contactor (KM 012-KM 102) is used for switching on/off a bypass, controlling the motor (M1-M10) to start/stop in a bypass state, the thermal relay (KH 1-KH 10) is used for carrying out overload protection on the motor (M1-M10), and the current transformer (TA 1-TA 10) is used for collecting current signals.
The control flow of the motor soft start control system of the invention is shown in figure 3. Wherein, the soft start loop contactors (KM 011-KM 101) are interlocked.
The devices are assembled according to fig. 1 and 2, and after the system is ready, the motor M1 is signaled by a wireless transmitter to start or stop:
(1) the wireless transmitter sends an activation signal to motor M1:
the wireless receiver receives and processes the starting signal and outputs a starting command to the PLC; the PLC receives a starting command of the wireless receiver, detects a soft start loop contactor KM101 for controlling other motors, such as M10, when the work of the KM101 is detected, a relay 1 for controlling the soft start of the motor M1 and the soft start loop contactor KM011 do not act, the soft starter SS does not respond to the work of the soft starter, and the motor M1 does not run;
when KM101 does not work, a relay 1 for controlling motor M1 to be in soft start and a soft start loop contactor KM011 are controlled to be in a movable state, a soft starter SS works, and a motor M1 runs; within 20 seconds after the KM011 is dynamically closed, if the soft starter SS has no bypass signal output to the PLC, the relay 1 and the KM011 which control the motor M1 to be in soft start are dynamically disconnected, and the motor M1 stops running; if the PLC detects a bypass signal of the soft starter SS, controlling a relay 2 of a bypass of a motor M1 to be switched on and a bypass contactor KM012 to be switched on, controlling a bypass of a motor M1 to operate, controlling relays 1 and KM011 of the motor M1 to be switched off after KM012 is switched on for 3 seconds, and after the soft start is finished, normally operating the bypass; soft starter SS waits for the next soft start cycle as described above;
(2) the wireless transmitter sends a stop signal to motor M1:
the wireless receiver receives and processes the stop signal and outputs a stop command to the PLC; when the PLC receives a stop command of the wireless receiver, no matter the system is in a soft start state or a bypass state, the relays 1 and KM011 for controlling the soft start of the motor M1 and the relays 2 and KM012 for controlling the bypass operation of the motor M1 are all switched off, and the motor M1 stops operating.
Claims (2)
1. The utility model provides an oil-well rig auxiliary motor soft start control system which characterized in that: the wireless transmitter and the wireless receiver are communicated through wireless signals; the output end of the wireless receiver is connected with the input end of the PLC, and the input end of the PLC is also connected with the soft starter SS; the output end of the PLC is respectively connected with a relay 1 for controlling the soft start and stop of the motor and a relay 2 for controlling the bypass operation of the motor, the relay 1 controls the on-off of a soft start loop contactor, and the relay 2 controls the on-off of a bypass contactor; one end of the soft start loop contactor is sequentially connected with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1 in series, the other end of the soft start loop contactor is sequentially connected with a thermal relay and a motor in series, and a lead between the thermal relay and the motor penetrates through a current transformer; one end of the bypass contactor is connected in parallel between the soft start loop contactor and the thermal relay, and the other end of the bypass contactor is connected in parallel between the incoming line breaker Q1 and the soft start incoming line contactor KM 61;
the soft starter SS is a bypass type soft starter;
the soft starter SS can be connected with more than two groups of thermal relays and soft start loop contactors in series and is connected with the same group of bypass contactors in parallel for controlling the soft start and stop of a plurality of motors.
2. A method for controlling the soft start of an auxiliary motor of an oil rig using the oil rig auxiliary motor soft start control system of claim 1, comprising the steps of:
s1, after the system is ready, the wireless transmitter is used for sending a start or stop signal to the motor M1 to be controlled;
s2, the wireless receiver receives the signal sent by the wireless transmitter, processes the signal and outputs a start or stop command to the PLC;
s3, the PLC receives the command, sends the output command to the corresponding relay through logic control, and the relay controls the action of the contactor to further control the starting or stopping of the motor M1, specifically:
(1) the PLC receives a starting signal of the wireless receiver and detects that a soft start loop contactor KM021-KM101 for controlling other motors M2-M10 does not work, a relay 1 for controlling the soft start and stop of the motor M1 and the soft start loop contactor KM011 are in a moving closing state, a soft starter SS works, and the motor M1 runs; within 20 seconds after the KM011 is dynamically closed, if the soft starter SS has no bypass signal output to the PLC, the relay 1 and the KM011 which control the soft start and stop of the motor M1 are dynamically disconnected, and the motor M1 stops running; if the PLC detects a bypass signal of the soft starter SS, the relay 2 for controlling the motor M1 to operate in a bypass mode is switched on, the bypass contactor KM012 is switched on, the motor M1 operates in a bypass mode, and after the KM012 is switched on for 3 seconds, the relay 1 and the KM011 for controlling the motor M1 to start and stop in a soft mode are switched off, and after the soft start is finished, the bypass works normally; soft starter SS waits for the next soft start cycle as described above;
(2) when the PLC receives a stop signal of M1 sent by the wireless receiver, no matter the system is in a soft start state or a bypass state, the relays 1 and KM011 for controlling the soft start and stop of the motor M1, the relay 2 for controlling the bypass operation of the motor M1 and the bypass contactor KM012 are all turned off, and the motor M1 stops operating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585526.2A CN112583302A (en) | 2020-12-29 | 2020-12-29 | Soft start control system and control method for auxiliary motor of petroleum drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585526.2A CN112583302A (en) | 2020-12-29 | 2020-12-29 | Soft start control system and control method for auxiliary motor of petroleum drilling machine |
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| CN112583302A true CN112583302A (en) | 2021-03-30 |
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| CN202011585526.2A Pending CN112583302A (en) | 2020-12-29 | 2020-12-29 | Soft start control system and control method for auxiliary motor of petroleum drilling machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949256A (en) * | 2021-10-15 | 2022-01-18 | 广东电网有限责任公司 | Topological structure for soft start control of converter of flexible direct-current distribution network |
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2020
- 2020-12-29 CN CN202011585526.2A patent/CN112583302A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949256A (en) * | 2021-10-15 | 2022-01-18 | 广东电网有限责任公司 | Topological structure for soft start control of converter of flexible direct-current distribution network |
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