CN117595257A - Full-automatic sequential control device and method for large-scale factory emergency load power supply - Google Patents

Full-automatic sequential control device and method for large-scale factory emergency load power supply Download PDF

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Publication number
CN117595257A
CN117595257A CN202311646936.7A CN202311646936A CN117595257A CN 117595257 A CN117595257 A CN 117595257A CN 202311646936 A CN202311646936 A CN 202311646936A CN 117595257 A CN117595257 A CN 117595257A
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CN
China
Prior art keywords
emergency
electric equipment
power
switch
electrically connected
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.)
Pending
Application number
CN202311646936.7A
Other languages
Chinese (zh)
Inventor
马巍
朱明归
骆祎
李立
曾立群
朱良祖
黎帆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangxin Hongsheng Copper Co ltd
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Yangxin Hongsheng Copper Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yangxin Hongsheng Copper Co ltd filed Critical Yangxin Hongsheng Copper Co ltd
Priority to CN202311646936.7A priority Critical patent/CN117595257A/en
Publication of CN117595257A publication Critical patent/CN117595257A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The invention relates to the technical field of assembly equipment, in particular to a full-automatic sequential control device and method for emergency load power supply of a large-scale factory. Comprising the following steps: a control circuit; the control circuit is electrically connected with the factory electric equipment and divides the electric equipment electrically connected with the control circuit into three different grades according to the use property of the electric equipment; a monitoring module; the monitoring module is used for detecting and collecting voltage and current information of a mains supply inlet wire electrically connected with electric equipment of a factory; an emergency power supply; the emergency power supply is electrically connected with the control circuit; a control module; the control module is electrically connected with the detection module, the emergency circuit switch, the emergency power supply and the power switch. The device realizes quick power supply within 1 minute, and ensures the safety production of a factory.

Description

Full-automatic sequential control device and method for large-scale factory emergency load power supply
Technical Field
The invention relates to the technical field of electricity, in particular to a full-automatic sequential control device and method for emergency load power supply of a large-scale factory.
Background
In the production and operation of enterprises, the influence of the blackout of the whole factory is huge for the enterprises, so that the economic benefit is influenced, and the safety and environmental protection accidents are probably caused seriously. How to quickly solve the emergency load power supply under the condition of large power failure of the whole factory is always a troublesome matter. Therefore, a solution is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a full-automatic sequential control device and method for supplying power to emergency loads of large factories, which can rapidly supply power to the emergency loads within 1 minute and ensure the safe production of the factories.
In order to achieve the purpose, the technical scheme of the invention is realized in such a way that a full-automatic sequential control device and method for supplying power to emergency loads of a large factory comprise the following steps:
a control circuit; the control circuit is electrically connected with the factory electric equipment, the electric equipment electrically connected with the control circuit is divided into a first stage, a second stage and a third stage according to the use property of the control circuit, the electric equipment of the first stage is powered by an independent standby circuit, and an emergency circuit switch is arranged on the standby circuit;
a monitoring module; the monitoring module is used for detecting and collecting voltage and current information of a mains supply inlet wire electrically connected with electric equipment of a factory;
an emergency power supply; the emergency power supply is electrically connected with the control circuit, and a power switch is arranged at the electrical connection part;
a control module; the control module is electrically connected with the detection module, the emergency circuit switch, the emergency power supply and the power switch, starts the emergency power supply according to the information fed back by the detection module, and controls the power switch and the emergency circuit switch to supply power to the electric equipment of the first stage.
Preferably, the first level is electric equipment which affects production safety and environmental protection; the second stage is electric equipment affecting production; the three stages are other devices.
Preferably, the electric equipment of the first stage is set to be an emergency load needing emergency power supply, and the emergency load is concentrated on 1-2 sections of buses of the control circuit.
Preferably, the electric equipment of the first stage is electrically connected with an independent diesel generator, and the running power of the electric equipment of the first stage is 70% -80% of the power generation power of the diesel generator electrically connected with the electric equipment of the first stage; the emergency power supply is a generator set formed by the independent diesel generators.
Preferably, an application program for automatically supplying power to the emergency load is arranged in the control module; the control program is set as a PLC program.
Preferably, the number of the input points and the output points of the PLC program is below 128 points, the program memory capacity is below 2KB, and a small PLC is selected; the number of input points and output points of the PLC program is 256-1024 points, and the program memory capacity is 2-8KB, so that the medium-sized PLC is selected; the input/output points of the PLC program are 1024 points, which can reach 8192 points at most, and the program memory quantity is 8KB or more than 8KB to select a large-scale PLC.
Preferably, the touch screen is further included; the touch screen is electrically connected with the PLC program and used for operating the PLC program.
Preferably, the control method of the device comprises the following steps:
s1, disconnecting a mains supply inlet wire switch within 3S, and disconnecting a bus connection switch between an independent circuit of primary electric equipment and independent circuits of secondary and tertiary electric equipment;
s2, switching off a switch of a transformer type load within 5 seconds to prevent excitation surge current from affecting power supply of primary electric equipment;
s3, after a no-voltage no-current signal of a mains supply inlet wire is detected by the monitoring module, starting a diesel generator electrically connected with the primary electric equipment within 3S, and finishing the parallel operation of a plurality of generators within 10S and supplying power to the outside;
and S4, switching on the power switch and the emergency circuit switch one by one according to the principle of the power side and the load side, and setting delay of 1-3S for switching on each switch.
The beneficial effects of the invention are as follows:
(1) According to the invention, the voltage loss signal of the mains supply is taken as the starting condition of the logic control program, the PLC is used for logic judgment and then controlling the relay to act to output the signal, so that the processes of opening and closing of the circuit breaker and starting, parallel operation and external power transmission of the diesel generator are controlled, the rapid power supply to the emergency load within 1 minute is realized, and the safety production of a factory is ensured.
(2) According to the invention, the electric equipment of the factory is classified according to the grades, and the electric equipment of the first grade is powered preferentially under the condition of power failure, so that the production safety is ensured, and the power supply pressure of the whole standby power supply is reduced.
Drawings
FIG. 1 is a schematic diagram of a power supply system of the present invention;
FIG. 2 is a control logic diagram of the emergency power supply system of the present invention;
FIG. 3 is a network block diagram of the present invention;
fig. 4 is a schematic diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. Embodiments and features of embodiments in this application may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
See fig. 1-4:
the invention provides a full-automatic sequential control device and method for large-scale factory emergency load power supply, comprising the following steps:
a control circuit; the control circuit is electrically connected with the factory electric equipment, and the electric equipment electrically connected with the control circuit is divided into a first stage, a second stage and a third stage according to the use property of the control circuit, wherein the first stage is the electric equipment which affects the production safety and environmental protection; the second level is electric equipment which affects production; the third stage is other equipment. The primary electric equipment is powered by an independent standby circuit, and an emergency circuit switch is arranged on the standby circuit; the primary electric equipment is set to be emergency load requiring emergency power supply, the emergency load is concentrated on 1-2 sections of buses of the control circuit, all primary loads are discharged according to emergency degree of power demand, and all emergency loads are concentrated on 10KV I section buses and 10KV III section buses during design and construction.
And configuring emergency diesel generators with different powers and different numbers according to the total power of the emergency load.
According to the power of the emergency load and the load variation range, a reasonable diesel generator is configured, and the general load capacity is 70-80% of the power of the generator.
An emergency power supply; the emergency power supply is electrically connected with the control circuit, and a power switch is arranged at the electrical connection part; the emergency power supply is a generator set formed by the independent diesel generators.
A control module; the control module is electrically connected with the detection module, the emergency circuit switch, the emergency power supply and the power switch, starts the emergency power supply according to the information fed back by the detection module, and controls the power switch and the emergency circuit switch to supply power to the electric equipment of the first stage.
The control module is provided with an application program for automatically supplying power to the emergency load; the control program is a PLC program.
Selecting a proper PLC according to the program size and the number of input/output points; the number of the input points and the output points of the PLC program is below 128 points, and the program memory capacity is below 2KB, so that a small PLC is selected; the number of input points and output points of the PLC program is 256-1024 points, and the program memory quantity is 2-8KB, so that the medium-sized PLC is selected; the number of input/output points of the PLC program is 1024 points, which can reach 8192 points at most, and the program memory quantity is 8KB or more, so that the large PLC is selected.
The touch screen is also included; the touch screen is electrically connected with the PLC program and used for operating the PLC program.
Designing control logic and writing control program
Referring to fig. 1 and 2, a mains supply inlet switch and a bus-bar switch between a primary load bus and secondary and tertiary loads are controlled by a PLC to be disconnected within 3s, the primary load is independently from the whole power system to form a standby circuit, and then the standby circuit is powered by an emergency diesel generator set. Namely, the PLC control trips the 1DL, 2DL, 3DL, 4DL, 5DL, 6DL switches.
Referring to fig. 1, a switch of a transformer type load (i.e., a feeder 1 switch in fig. 1) is controlled to be disconnected within 5s by a PLC (programmable logic controller), so as to prevent an emergency diesel generator from performing a switch (9 DL) protection action caused by a transformer excitation surge, thereby influencing the normal external power supply of the generator.
A monitoring module; the monitoring module is used for detecting and collecting voltage and current information of a mains supply inlet wire electrically connected with the factory electric equipment. The PLC detects the position signals of the incoming line of the mains supply, the no-voltage no-current signal of the safety power supply and the switching-off state of the incoming line switch of the emergency diesel power generation through the comprehensive protection measurement and control devices on the switch cabinets, at the moment, the PLC sends a starting signal to the diesel generator set, the starting is completed in the diesel generator set 3s, the parallel operation of the generators within 5 times is completed within 10s, and the power is supplied to the outside (the more the number of the units is, the longer the parallel operation is completed);
after the diesel generator set is started, the PLC detects that the incoming power supply of the diesel generator is powered on through the comprehensive protection measurement and control device, the safety power supply incoming switch is in a switching-off state, the switch is controlled to be switched on one by one to supply power to the outside according to the principle of the power supply side and the load side, and when the PLC program is written, switching-on of all stages of switches is required to be separated by 1-3s, namely 10DL, 11DL, 12DL and 13DL switching-on are controlled by the PLC in sequence.
The PLC sequentially controls the switch closing of the emergency load (namely the feeder line 1 … feeder line n in the control diagram I) according to the emergency load time sequence table in the section (1) of the specific implementation mode, and the closing time of each switch is also 1-3s apart.
And writing a PLC control program according to the requirements.
Designing a circuit diagram and performing wiring installation
Referring to the third diagram, the control module mainly comprises a PLC, a switch and a touch screen, the middle is communicated through network cable connection, the PLC is used for logic operation of the control module, and the touch screen is used for operation control and display of the device;
referring to the fourth figure, the device rectifies 220V alternating current into 24V direct current power through a 24V power module to supply power, the device performs logic operation through PLC analog quantity input (AI) and digital quantity input (DI), converts an operation result into digital quantity output (DO) to control the action of an intermediate relay, and the control of starting and switching on/off of the diesel generator is realized.
In summary, by adopting the full-automatic sequential control device and method for supplying power to the emergency load of the large-scale factory, the problem that the power supply of the emergency load can be completed within 1 minute under the condition of power failure of the commercial power can be solved, and the production safety of the factory is ensured.
Example 2
The control method of the device comprises the following steps:
s1, disconnecting a mains supply inlet wire switch within 3S, and disconnecting a bus connection switch between an independent circuit of primary electric equipment and independent circuits of secondary and tertiary electric equipment;
s2, switching off a switch of a transformer type load within 5 seconds to prevent excitation surge current from affecting power supply of primary electric equipment;
s3, after a no-voltage no-current signal of a mains supply inlet wire is detected by the monitoring module, starting a diesel generator electrically connected with the primary electric equipment within 3S, and finishing the parallel operation of a plurality of generators within 10S and supplying power to the outside;
and S4, switching on the power switch and the emergency circuit switch one by one according to the principle of the power side and the load side, and setting delay of 1-3S for switching on each switch.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (8)

1. A full-automatic sequential control device for supplying power to emergency load of large-scale factory is characterized by comprising:
a control circuit; the control circuit is electrically connected with the factory electric equipment, the electric equipment electrically connected with the control circuit is divided into a first stage, a second stage and a third stage according to the use property of the control circuit, the electric equipment of the first stage is powered by an independent standby circuit, and an emergency circuit switch is arranged on the standby circuit;
a monitoring module; the monitoring module is used for detecting and collecting voltage and current information of a mains supply inlet wire electrically connected with electric equipment of a factory;
an emergency power supply; the emergency power supply is electrically connected with the control circuit, and a power switch is arranged at the electrical connection part;
a control module; the control module is electrically connected with the detection module, the emergency circuit switch, the emergency power supply and the power switch, starts the emergency power supply according to the information fed back by the detection module, and controls the power switch and the emergency circuit switch to supply power to the electric equipment of the first stage.
2. The fully automatic sequential control device for supplying power to emergency load of large-scale factory according to claim 1, wherein said first stage is electric equipment which affects production safety and environmental protection; the second stage is electric equipment affecting production; the three stages are other devices.
3. The fully automatic sequential control device for supplying power to emergency load of large-scale factory according to claim 2, wherein the electric equipment of the first stage is set as the emergency load needing emergency power supply, and the emergency load is concentrated on 1-2 sections of bus of the control circuit.
4. The fully automatic sequential control device for supplying power to emergency load of large-scale factory according to claim 3, wherein said electric equipments of one stage are electrically connected with independent diesel generators respectively, and the running power of each electric equipment of one stage is 70% -80% of the power generation power of the diesel generator electrically connected with each electric equipment of one stage; the emergency power supply is a generator set formed by the independent diesel generators.
5. The fully automatic sequential control device for supplying power to emergency loads of large factories according to claim 1, 2, 3 or 4, wherein the control module is provided with an application program for automatically supplying power to the emergency loads; the control program is set as a PLC program.
6. The full-automatic sequential control device for supplying power to emergency load of large-scale factory according to claim 5, wherein the number of input and output points of the PLC program is below 128 points, and the program memory is below 2KB, so that a small-sized PLC is selected; the number of input points and output points of the PLC program is 256-1024 points, and the program memory capacity is 2-8KB, so that the medium-sized PLC is selected; the input/output points of the PLC program are 1024 points, which can reach 8192 points at most, and the program memory quantity is 8KB or more than 8KB to select a large-scale PLC.
7. The fully automatic sequential control device for supplying power to emergency loads of large factories according to claim 5, further comprising a touch screen; the touch screen is electrically connected with the PLC program and used for operating the PLC program.
8. The control method of a fully automatic sequential control device for supplying power to emergency load of large-scale factory according to any one of claims 1 to 7, wherein the control method of the device is as follows:
s1, disconnecting a mains supply inlet wire switch within 3S, and disconnecting a bus connection switch between an independent circuit of primary electric equipment and independent circuits of secondary and tertiary electric equipment;
s2, switching off a switch of a transformer type load within 5 seconds to prevent excitation surge current from affecting power supply of primary electric equipment;
s3, after a no-voltage no-current signal of a mains supply inlet wire is detected by the monitoring module, starting a diesel generator electrically connected with the primary electric equipment within 3S, and finishing the parallel operation of a plurality of generators within 10S and supplying power to the outside;
and S4, switching on the power switch and the emergency circuit switch one by one according to the principle of the power side and the load side, and setting delay of 1-3S for switching on each switch.
CN202311646936.7A 2023-11-30 2023-11-30 Full-automatic sequential control device and method for large-scale factory emergency load power supply Pending CN117595257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311646936.7A CN117595257A (en) 2023-11-30 2023-11-30 Full-automatic sequential control device and method for large-scale factory emergency load power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311646936.7A CN117595257A (en) 2023-11-30 2023-11-30 Full-automatic sequential control device and method for large-scale factory emergency load power supply

Publications (1)

Publication Number Publication Date
CN117595257A true CN117595257A (en) 2024-02-23

Family

ID=89918177

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311646936.7A Pending CN117595257A (en) 2023-11-30 2023-11-30 Full-automatic sequential control device and method for large-scale factory emergency load power supply

Country Status (1)

Country Link
CN (1) CN117595257A (en)

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