CN111878225B - Diesel generating set protection control system and control method - Google Patents
Diesel generating set protection control system and control method Download PDFInfo
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- CN111878225B CN111878225B CN202010734792.0A CN202010734792A CN111878225B CN 111878225 B CN111878225 B CN 111878225B CN 202010734792 A CN202010734792 A CN 202010734792A CN 111878225 B CN111878225 B CN 111878225B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000009467 reduction Effects 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 21
- 239000003208 petroleum Substances 0.000 description 16
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Chemical & Material Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a protection control system and a control method for a diesel generating set. A diesel generator set protection control system comprises a plurality of groups of diesel generator sets, a plurality of SCR control modules and a power protection module; each SCR control module is connected with a plurality of oil drilling machines; the power protection module comprises a plurality of diesel generator control units, a power station capacity detection unit and a processing unit; the diesel generator control unit is connected with the diesel generator set; the power station capacity detection unit is connected with the power station; the diesel generator control units and the SCR control modules are respectively connected with the processing unit. According to the invention, through the cooperative work of the power protection module and the SCR control module, the output power and the output current of the diesel generator set can be adjusted according to the load requirement of the oil rig, the normal operation of the oil rig is ensured by using the optimal strategy and using the minimum energy consumption, and the method is a great progress in the field.
Description
Technical Field
The invention relates to the field of diesel generators, in particular to a protection control system and a control method for a diesel generator set.
Background
When petroleum drilling operation is carried out in an inexhaustible desert environment, uninterrupted stable power supply of a power station of a whole drilling operation team is a necessary condition, in view of severe natural environment, the power station is required to have 24-hour uninterrupted power supply capacity, particularly in a tripping operation link, even a short-time power failure can cause serious drilling accidents and cause huge economic loss cost, and a circuit for protecting the stable operation of the power station and the normal operation of a drilling machine becomes an indispensable choice under the design of any environment and working condition. The petroleum drilling machine power station generally comprises a system power station formed by 3-5 petroleum special diesel generator sets in a grid-connected mode, and provides power for a petroleum drilling machine system. The petroleum drilling machine load generally comprises 4-5 SCR rectifier cabinets dragging 7-9 high-power direct current motors and MCC units with different powers dragging low-power synchronous motors.
Firstly, the power capacity of a diesel generating set forming a power station is small, a plurality of parallel machines are needed to meet the load requirement of a drilling machine, in addition, in order to meet the requirement of fuel saving, the number of on-grid machine sets and the daily, weekly and monthly overhaul of the machine sets are reduced as much as possible, and the number of the on-grid machine sets which are operated daily is difficult to fix; secondly, the drilling machine has different power values required by various working conditions of loading, different change rates and loading randomness and irregularity, so that the drilling machine and the drilling machine are difficult to match. The instantaneous fluctuation of the voltage and the frequency of the generator set is large, the control system is protected, and the well site is completely powered off, so that serious production drill stopping accidents and overload damage or damage of the diesel generator set are caused. In view of the situation, the general well team often adopts the method that the capacity of the net generating set is far higher than the capacity required by the actual load, and even then, the normal operation of the well team is difficult to guarantee, and meanwhile, a great deal of fuel oil is wasted.
Therefore, the existing protection field of the petroleum diesel generator has defects and needs to be improved.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a protection control system and a control method for a diesel generator set, which can ensure that the diesel generator set cannot be overloaded, damaged or damaged under the condition that the working condition is changed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a diesel generator set protection control system comprises a plurality of groups of diesel generator sets, a plurality of SCR control modules and a power protection module; each SCR control module is connected with a plurality of oil drilling machines;
the diesel generator set comprises a diesel engine and a generator; the diesel engine is connected with the generator, and the generator is connected with a power station; the power station is connected with a plurality of oil drilling rigs;
the power protection module comprises a plurality of diesel generator control units, a power station capacity detection unit and a processing unit; the diesel generator control unit is connected with the diesel generator set; the power station capacity detection unit is connected with the power station; the diesel generator control units and the SCR control modules are respectively connected with the processing unit.
Preferably, in the diesel generator set protection control system, the SCR control module includes the load control unit, an active power detection unit, and a current load detection unit; the active power detection unit and the current load detection unit are respectively connected with the load control unit.
Preferably, in the diesel generator set protection control system, the diesel generator control unit comprises a diesel generator control circuit and a generator control circuit, which are respectively connected with the processing unit; the diesel engine control circuit is connected with the diesel engine; the generator control circuit is connected with the generator.
The protection control system of the diesel generator set preferably further comprises an indication module for showing the working state of the system; the indicating module is an indicating lamp or a display screen.
A diesel generating set protection control method for the diesel generating set protection control system comprises the following steps:
s1, the power protection module limits the output power of the multiple groups of diesel generator sets not to exceed the rated output power; balancing the total output power of a plurality of groups of the diesel generators with the active load of all oil rigs;
s2, when the connection number of the oil drilling rigs is increased, the SCR control module inhibits the active load sudden change of the drilling rigs, maintains the normal work of the oil drilling rigs with the original connection number, and simultaneously sends load increase data to the power protection module;
s3, the power protection module drives a plurality of groups of diesel generator sets to slowly increase output power according to the load increase data, and the capacity of the power station is increased;
and S4, the power station capacity detection unit detects capacity detection data of the power station and transmits the data to the processor, and when the processor determines that the capacity of the power station is increased, the SCR control module is controlled to start an increased oil drilling machine according to the capacity increase amount of the power station.
Preferably, the diesel generator set protection control method further includes, in step S4:
when the output power of the multiple groups of diesel generating sets reaches the rated power and the capacity of the power station still cannot reach the preset capacity, the SCR control module controls the conduction angle, keeps the connected oil drilling machine to keep the current power running and gives an alarm that the power is insufficient.
Preferably, the diesel generator set protection control method further comprises the following steps:
s5, when the number of connections of the oil rig decreases, the SCR control module sending load reduction data to the power protection;
and S6, the power protection module drives a plurality of groups of diesel generator sets to slowly reduce output power according to the load reduction data, and the capacity of the power station is reduced.
Preferably, in the diesel generator set protection control method, the slowly increasing output power and the slowly decreasing output power increase and decrease the output power according to a ramp.
Preferably, the diesel generator set protection control method further includes:
and S7, displaying indication information to the outside to indicate whether the system enters a normal working state after increasing or decreasing.
Compared with the prior art, the protection control system and the control method for the diesel generating set provided by the invention have the following beneficial effects:
according to the invention, the output power and the output current of the diesel generator set are mutually balanced with the active power and the load current of the petroleum drilling machine through the cooperative work of the power protection module and the SCR control module, so that the output power and the output current of the diesel generator set can be adjusted according to the load requirement of the petroleum drilling machine, the petroleum drilling machine can be ensured to normally operate by using the optimal strategy and using the minimum energy consumption, and the method is a great progress in the field.
Drawings
FIG. 1 is a block diagram of a protection control system of a diesel generator set provided by the invention;
FIG. 2 is a flow chart of a diesel generator set protection control method provided by the invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following embodiments are provided with reference to the accompanying drawings
The present invention is described in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, a diesel generator set protection control system includes a plurality of diesel generator sets G, a plurality of SCR control modules 10, and a power protection module (not shown); each SCR control module 10 is connected with a plurality of oil rigs; it should be noted that the number of the SCR control modules 10 and the number of the oil rigs may be the same or different, and the connection relationship between the SCR control modules and the oil rigs may be connected according to a certain attribution relationship;
the diesel generator set comprises a diesel engine and a generator; the diesel engine is connected with the generator, and the generator is connected with a power station; the power station is connected with a plurality of oil drilling rigs; specifically, the diesel generator drives the generator to work to generate electricity, and then electric energy is transmitted to a power station; then the power station works to the oil rig, and the SCR control module 10 and the power protection module work cooperatively to determine whether the oil rig is driven to start; the invention is not limited by the transmission structure between the diesel generator and the generator;
the power protection module comprises a plurality of diesel generator control units 21, a power station capacity detection unit and a processing unit 22; the diesel generator control unit 21 is connected with the diesel generator set and used for controlling the output power and the output current of the diesel generator set; the power station capacity detection unit is connected with the power station and used for detecting the capacity of the power station; the plurality of diesel generator control units 21 and the plurality of SCR control modules 10 are connected to the processing unit 22, respectively. The power station supplies power to the oil rig.
Correspondingly, the invention provides a diesel generating set protection control method for the diesel generating set protection control system, which comprises the following steps:
s1, the power protection module limits the output power of the multiple groups of diesel generator sets not to exceed the rated output power; balancing the total output power of a plurality of groups of the diesel generators with the active load of all oil rigs;
s2, when the connection number of the oil rig is increased, the SCR control module 10 restrains the active load outburst of the rig
Maintaining the normal work of the petroleum drilling machines in the original connection quantity, and simultaneously sending load increasing data to the power protection module;
s3, the power protection module drives a plurality of groups of diesel generator sets to slowly increase output power according to the load increase data, and the capacity of the power station is increased;
and S4, the power station capacity detection unit detects the capacity detection data of the power station and transmits the data to the processor, and when the processor determines that the capacity of the power station is increased, the SCR control module 10 is controlled to start the increased oil drilling rig according to the capacity increase amount of the power station.
Specifically, the control principle of the diesel generator set protection control system provided by the invention is as follows: limiting the output power of each diesel generator set to be not more than rated power and the output current to be not more than rated current by using the diesel generator control unit 21 in the power protection module, and inhibiting active load and current load sudden change of the petroleum drilling machine by using the SCR control module 10 to match the response time of the diesel generator sets; the processing unit 22 receives the power station capacity data of the power station capacity detection unit in real time, and drives the SCR control module 10 to drag the oil rig to perform network access operation when the number of the power stations is increased. The real-time output power of a plurality of diesel generator sets in the network is in butt joint control with the real-time power control of each load of the petroleum drilling machine, so that the change of the load of the drilling machine is limited by the real-time output power state of the diesel generator sets, and meanwhile, when the petroleum drilling machine is started in the network, the diesel generator is not overloaded, and the drilling machine is not used to stop working.
Preferably, in this embodiment, the SCR control module 10 includes the load control unit, an active power detection unit, and a current load detection unit; the active power detection unit and the current load detection unit are respectively connected with the load control unit. Specifically, the load control unit is used for controlling whether a petroleum drilling machine connected with the load control unit is started or not, and when a new petroleum drilling machine is connected to a circuit on a managed line, the increase of active power and required current of the petroleum drilling machine can be actively inhibited, the conduction angle of the SCR is controlled, the output power of a load is reduced, and the purpose of protecting a diesel generator set and the whole system is achieved; and then, adjusting the conduction angle according to the signal indication of the power protection module.
Preferably, in this embodiment, the diesel generator control unit 21 includes a diesel engine control circuit and a generator control circuit, which are respectively connected to the processing unit 22; the diesel engine control circuit is connected with the diesel engine; the generator control circuit is connected with the generator. Specifically, the diesel engine control circuit is used for controlling the diesel engine to operate under rated power, and the generator control circuit is used for controlling the output current of the generator to be below rated current.
Preferably, in this embodiment, in step S4, the method further includes:
when the output power of the multiple groups of diesel generating sets reaches the rated power and the capacity of the power station still cannot reach the preset capacity, the SCR control module 10 controls the conduction angle, keeps the connected oil drilling machine to keep the current power running and gives an alarm that the power is insufficient. Specifically, at this time, solutions such as providing output power can be performed by adding a diesel generator set.
As a preferable scheme, in this embodiment, the method further includes the steps of:
s5, when the number of connections of the oil rig decreases, the SCR control module 10 sending load reduction data to the power protection;
and S6, the power protection module drives a plurality of groups of diesel generator sets to slowly reduce output power according to the load reduction data, and the capacity of the power station is reduced.
Preferably, in this embodiment, the slowly increasing output power and the slowly decreasing output power increase and decrease the output power according to a ramp wave. Specifically, the increase or decrease of the output power according to the ramp wave is ensured
The diesel generator set can keep smooth and stable improvement or reduction of the operation power, so that sudden power increase or reduction is avoided, and the stability and the safety of the system are kept.
As a preferred scheme, in this embodiment, the display device further includes an indication module, configured to show a working state of the system; the indicating module is an indicating lamp or a display screen.
Preferably, in this embodiment, the method further includes:
and S7, displaying indication information to the outside to indicate whether the system enters a normal working state after increasing or decreasing.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (9)
1. A diesel generating set protection control system is characterized by comprising a plurality of groups of diesel generating sets, a plurality of SCR control modules and a power protection module; each SCR control module is connected with a plurality of oil drilling machines;
the diesel generator set comprises a diesel engine and a generator; the diesel engine is connected with the generator, and the generator is connected with a power station; the power station is connected with a plurality of oil drilling rigs;
the power protection module comprises a plurality of diesel generator control units, a power station capacity detection unit and a processing unit; the diesel generator control unit is connected with the diesel generator set; the power station capacity detection unit is connected with the power station; the diesel generator control units and the SCR control modules are respectively connected with the processing unit;
the control method of the diesel generator set protection control system comprises the following steps:
s1, the power protection module limits the output power of the multiple groups of diesel generator sets not to exceed the rated output power; balancing the total output power of a plurality of groups of the diesel generators with the active load of all oil rigs;
s2, when the connection number of the oil drilling rigs is increased, the SCR control module inhibits the active load sudden change of the drilling rigs, maintains the normal work of the oil drilling rigs with the original connection number, and simultaneously sends load increase data to the power protection module;
s3, the power protection module drives a plurality of groups of diesel generator sets to slowly increase output power according to the load increase data, and the capacity of the power station is increased;
s4, the power station capacity detection unit detects capacity detection data of the power station and transmits the data to the processor, and when the processor determines that the capacity of the power station is increased, the processor controls the SCR control module to start an increased oil drilling machine according to the capacity increase amount of the power station.
2. The diesel generator set protection control system of claim 1, wherein the SCR control module comprises a load control unit, an active power detection unit, a current load detection unit; the active power detection unit and the current load detection unit are respectively connected with the load control unit.
3. The diesel generator set protection and control system of claim 1, wherein the diesel generator control unit comprises a diesel generator control circuit and a generator control circuit, which are respectively connected with the processing unit; the diesel engine control circuit is connected with the diesel engine; the generator control circuit is connected with the generator.
4. The diesel generator set protection control system of claim 1, further comprising an indication module for displaying the operating status of the system; the indicating module is an indicating lamp or a display screen.
5. A control method of a diesel generator set protection control system is characterized in that the diesel generator set protection control system comprises a plurality of groups of diesel generator sets, a plurality of SCR control modules and a power protection module; each SCR control module is connected with a plurality of oil drilling machines;
the diesel generator set comprises a diesel engine and a generator; the diesel engine is connected with the generator, and the generator is connected with a power station; the power station is connected with a plurality of oil drilling rigs;
the power protection module comprises a plurality of diesel generator control units, a power station capacity detection unit and a processing unit; the diesel generator control unit is connected with the diesel generator set; the power station capacity detection unit is connected with the power station; the diesel generator control units and the SCR control modules are respectively connected with the processing unit;
the control method of the diesel generator set protection control system comprises the following steps:
s1, the power protection module limits the output power of the multiple groups of diesel generator sets not to exceed the rated output power; balancing the total output power of a plurality of groups of the diesel generators with the active load of all oil rigs;
s2, when the connection number of the oil drilling rigs is increased, the SCR control module inhibits the active load sudden change of the drilling rigs, maintains the normal work of the oil drilling rigs with the original connection number, and simultaneously sends load increase data to the power protection module;
s3, the power protection module drives a plurality of groups of diesel generator sets to slowly increase output power according to the load increase data, and the capacity of the power station is increased;
s4, the power station capacity detection unit detects capacity detection data of the power station and transmits the data to the processor, and when the processor determines that the capacity of the power station is increased, the processor controls the SCR control module to start an increased oil drilling machine according to the capacity increase amount of the power station.
6. The control method of the diesel generator set protection control system according to claim 5, wherein in step S4, the method further comprises:
when the output power of the multiple groups of diesel generating sets reaches the rated power and the capacity of the power station still cannot reach the preset capacity, the SCR control module controls the conduction angle, keeps the connected oil drilling machine to keep the current power running and gives an alarm that the power is insufficient.
7. The control method of the diesel generator set protection control system according to claim 5, further comprising the steps of:
s5, when the number of connections of the oil rig decreases, the SCR control module sending load reduction data to the power protection;
and S6, the power protection module drives a plurality of groups of diesel generator sets to slowly reduce output power according to the load reduction data, and the capacity of the power station is reduced.
8. The control method of a diesel generator set protection and control system according to claim 7, wherein the slowly increasing output power and the slowly decreasing output power increase and decrease the output power according to a ramp.
9. The control method of the diesel generator set protection control system according to claim 7, further comprising:
and S7, displaying indication information to the outside to indicate whether the system enters a normal working state after increasing or decreasing.
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| US4288736A (en) * | 1978-04-12 | 1981-09-08 | Newage Engineers Limited | Control systems for electric generators |
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