CN114744748A - Logic control method of data center diesel engine parallel machine control system - Google Patents
Logic control method of data center diesel engine parallel machine control system Download PDFInfo
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- 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
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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- 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
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a logic control method of a data center diesel engine parallel machine control system, which comprises an automatic state logic control method, a diesel engine self-starting logic flow: the main diesel engine controller of the diesel engine set is arranged in an automatic state, the parallel main control cabinet is arranged in an automatic state, the comprehensive protection equipment of the medium-voltage square bin detects the states of two mains supplies and outputs each mains supply state to the parallel busbar of the parallel main control cabinet in a dry contact manner, the parallel busbar directly divides a mains supply state signal into seven parts which are correspondingly transmitted to the main diesel engine controllers of the seven diesel engine sets one by one, and each main diesel engine controller monitors each received mains supply state in real time and performs corresponding action according to each mains supply state. According to the logic control method of the data center diesel engine parallel operation control system, a distributed control mode is adopted, after the stable unit is switched on firstly, other units can complete switching-on parallel operation after synchronous parallel operation setting is achieved, and the parallel operation speed is higher.
Description
Technical Field
The invention relates to a logic control method of a data center diesel engine concurrent control system.
Background
The data center is a building site for providing an operating environment for electronic information equipment which is placed in a centralized manner, is an important support platform for promoting the strategic development of the Internet plus, and is vigorously developed in recent years, and the scale and the quantity are rapidly increased.
For a power supply system of a data center, the requirement of the design specification of the data center GB50174-2017 is that the A-level data center needs to have double mains supply, and meanwhile, a diesel generator set is suitable to be equipped as a backup power supply. In order to ensure the reliable, complete and normal backup power supply power generation, transmission and distribution requirements of a data center, power generation, transmission and distribution equipment such as a transformer, a diesel generator set, a high-low voltage switch cabinet and the like are required to work reliably, and meanwhile, the diesel generator set monitoring system with complete functions can continuously collect and manage the running state of the equipment, so that centralized control and management are facilitated, and reliable and safe running is further ensured.
At present, when a plurality of diesel generator sets of a data center backup power supply system are used in parallel, a traditional mode is that the sets with higher priority levels are controlled to be connected in parallel by setting priority levels, and the connection time is affected by the sets with higher priority levels, even the sets with lower priority levels cannot be connected in parallel.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a logic control method of a diesel engine parallel operation control system of a data center, which adopts a distributed control mode and is a competitive on duty mode, and the other units can complete the closing parallel operation after the stable unit is closed and the synchronous parallel operation setting is reached, so that the parallel operation speed is higher, and the failure of the whole parallel operation system caused by the control system problem of a single unit can be avoided.
The technical scheme for realizing the purpose is as follows: a logic control method of a data center diesel engine parallel machine control system comprises seven diesel engine generator sets, a set of parallel machine main control cabinet, seven incoming line cabinets, two feeder cabinets and a dummy load test cabinet, wherein the parallel machine main control cabinet comprises a main PLC, a standby PLC and a human-computer interface, and a diesel engine host controller of each diesel engine generator set is respectively communicated with the main PLC, the standby PLC and the human-computer interface sequentially through a serial server and an industrial switch; the seven incoming line cabinets, the two feeder cabinets and the dummy load test cabinet are respectively connected with a parallel busbar of the main control cabinet of the diesel engine parallel machine; the seven incoming line cabinets are connected with the seven firewood generating units in one-to-one correspondence; a main diesel engine controller of each diesel engine unit is externally connected with a monitoring background through a serial server and an industrial exchanger in sequence;
the logic control method comprises an automatic state logic control method, the automatic state logic control method comprises a diesel self-starting logic flow, a diesel stopping logic flow and a diesel remote starting logic flow, wherein:
s1, the logic flow of firewood self-starting: the main engine controller is set up in automatic state, and the parallel operation master control cabinet sets up in automatic state, and the comprehensive protection equipment in middling pressure square storehouse detects two way mains supply states to export every way mains supply state with the form of dry contact to the parallel busbar of parallel operation master control cabinet, and the parallel busbar directly divide this mains supply state signal into seven one, and the one-to-one ground is given the main engine controller is sent to seven firewood of firewood generator group, and every firewood generator controller real-time supervision every way mains supply state received, and does corresponding action according to every way mains supply state:
s11, if the comprehensive protection device of the medium-voltage square bin sends a commercial power failure state signal, the diesel generator set is directly started to complete parallel operation, electricity is sent to the medium-voltage square bin, and loading is started, and the specific process comprises the following steps: seven firewood generating sets are in a competition on duty mode, firewood generating host controllers of the seven firewood generating sets receive commercial power failure state signals through a network at the same time, all the firewood generating sets open shutters at first and then start, the voltage and the frequency are automatically adjusted to be set values after all the firewood generating sets start, the firewood generating set which reaches the set values at first is put into the parallel busbar at first, the firewood generating host controllers of the rest firewood generating sets detect the upper and lower port voltage, the frequency and the phase of the respective parallel switch, the frequency and the voltage of the engine of the firewood generating sets are automatically tracked, after the window set values and the synchronization time are reached, the corresponding inlet wire cabinets are commanded to be closed, the automatic synchronization process is finished, and closing parallel operation is completed; after the primary PLC or the standby PLC of the master control cabinet completes the parallel operation, the two feeder cabinets are switched on, and the power is automatically distributed to all the on-line firewood generating units by the firewood generating parallel operation control system;
s12, if the comprehensive protection equipment of the medium-voltage square cabin sends a commercial power failure signal to be recovered, the firewood generator set maintains a parallel operation state;
s2, a logic flow of diesel engine shutdown: the monitoring background issues a firewood sending shutdown command to the parallel operation main control cabinet, after delay confirmation, the whole firewood sending unit is subjected to a shutdown process, when the parallel operation main control cabinet confirms that the power of the firewood sending unit is lower than a set value, the parallel operation main control cabinet automatically disconnects a circuit breaker, the firewood sending unit is disconnected, a firewood sending host controller of the firewood sending unit automatically performs a cooling shutdown program, and the next cycle is performed after shutdown;
s3, remote starting logic flow of diesel engine: the diesel engine host controller transmits data to a monitoring background through a serial server and an industrial switch, and the monitoring background controls the diesel engine set to start and stop through a network; seven firewood generating units are communicated with each other, and after receiving a starting command, the firewood generating units are started and automatically complete parallel operation; and after the main PLC or the standby PLC of the main control cabinet detects that the parallel operation is finished, the main PLC or the standby PLC controls the two feeder line cabinets to be switched on.
According to the logic control method of the data center diesel engine parallel machine control system, the human-computer interface is communicated with the monitoring background through the industrial switch.
The logic control method of the data center diesel engine parallel machine control system is characterized in that the parallel machine completes switching on six or more incoming line cabinets in seven incoming line cabinets; when the closing and parallel operation of six incoming line cabinets corresponding to the six diesel generator sets are completed, the parallel operation main control cabinet, namely a closing feeder cabinet, sends electricity to the medium-voltage square bin and starts to carry load; the power control function is started by the diesel engine host controller, the total output load is detected by the engine main control cabinet, and the number of the units is automatically increased or decreased.
The logic control method of the diesel engine parallel control system of the data center is characterized in that the diesel engine self-starting logic flow adopts a distributed control mode and is connected in parallel in a frequency and voltage synchronization mode, a parallel main control cabinet communicates with the diesel engine host controllers of seven diesel engine units in the whole parallel control system through a TCP/IP network of an industrial switch, and the frequency and the voltage of each diesel engine unit are automatically adjusted to be free from the influence of load increase and load decrease and kept at a set value;
the main control cabinet of the parallel machine is used for realizing the on-off control of each feeder cabinet and the data uploading of the whole diesel engine parallel machine control system;
when the main PLC and the standby PLC of the parallel main control cabinet are both in failure, the diesel engine controller of the diesel engine unit receives a mains supply failure signal provided by the integrated protection equipment of the medium-voltage square bin, the commercial supply failure signal can be executed according to the diesel engine self-starting logic flow, but the two feeder cabinets cannot control switching on; at the moment, two feeder cabinets are manually switched on, electricity is transmitted to the medium-voltage square bin, and loading is started.
The logic control method of the diesel engine parallel operation control system in the data center further comprises a manual state logic control method, the manual state logic control method comprises a manual splitting logic flow, an emergency shutdown logic flow and a manual parallel operation logic flow, wherein:
a, manually splitting logic flow: all the on-line operating firewood generating units are allowed to be manually disconnected, corresponding firewood generating unit stop buttons are triggered in the parallel main control cabinet, the parallel main control cabinet firstly carries out a load transfer process, the power of the disconnected firewood generating units is gradually reduced, after a set value is reached, the corresponding inlet cabinet is automatically disconnected, the corresponding firewood generating units are disconnected, then a firewood generating main machine controller of the firewood generating units automatically carries out a cooling stop program, and the next cycle is carried out after the shutdown;
B. emergency shutdown logic flow: when a shutdown fault occurs to an operating diesel generator set or an emergency shutdown button is pressed, a main control cabinet immediately disconnects a corresponding diesel generator set circuit breaker and controls the diesel generator set to shutdown, if the fault or emergency shutdown occurs to the side of a parallel main control cabinet and the diesel generator set has no fault, the diesel generator set carries out a cooling shutdown process, next circulation is carried out after shutdown, and alarm information is displayed on a human-computer interface of the parallel main control cabinet; if a fault or sudden stop occurs at the side of the diesel engine set, the diesel engine set is immediately stopped, and an alarm is simultaneously displayed on a control screen of a controller of the diesel engine host and a human-computer interface of a parallel machine master control cabinet;
C. the manual parallel operation logic flow comprises the following steps: the main diesel engine controller of the diesel engine set is set in a manual state, the parallel operation main control cabinet is set in the manual state, and the parallel operation main control cabinet does not receive external starting signal control and is manually controlled; when the diesel engine set needs to be started, the diesel engine set is manually started, a switch-on or switch-in button is triggered at the parallel operation main control cabinet, the parallel operation main control cabinet automatically synchronizes and automatically switches on, and the power is automatically distributed after the parallel operation is finished; when the firewood generating set needs to be shut down, the firewood generating set parallel control system cannot be automatically shut down in the working mode, firstly, the set parallel is disconnected, after a shutdown or disconnection button is triggered at the parallel main control cabinet, the corresponding firewood generating set automatically transfers load, when the load is reduced to a set value, the corresponding inlet cabinet is automatically disconnected, the firewood generating set is disconnected, the firewood generating set continues to operate at the moment, and then the firewood generating set is manually shut down.
After all the 7 diesel generator sets are operated in parallel, the system starts to be reduced when the total load is less than X, wherein X is (n-1) Pe-8011 set value; n is the number of the currently operated diesel generators; pe is rated power; the 8011 setting value represents the PM shutdown reserve active value; setting the magnitude of a standby power value of the PM shutdown and the time of the PM shutdown countdown in a human-computer interface; when the unit is reduced, the unit number is reduced first or the running time is long first.
The logic control method of the data center diesel engine parallel operation control system is characterized in that the engine is increased when the total load is greater than X ', and X' is n Pe-8001 set value; n is the number of the currently operated diesel generators; pe is rated power; 8001 the set value indicates a PM startup storage availability value; and setting the magnitude of the stored active value of the PM start-up and the time of the PM start-up countdown on the human-computer interface.
The logic control method of the diesel engine parallel operation control system of the data center adopts a distributed control mode, is a competitive on duty mode, and is characterized in that after the first stable unit is switched on, other units can complete switching on and parallel operation after synchronous parallel operation setting is achieved, the parallel operation speed is higher, the failure of the whole parallel operation system caused by the problem of the control system of a single unit is avoided, the fault of one unit does not influence the whole parallel operation control system, and the fault can be conveniently processed in operation.
Drawings
FIG. 1 is a block diagram of a data center diesel engine parallel machine control system;
FIG. 2 is a communication connection diagram of a diesel engine parallel machine control system of a data center;
FIG. 3 is a flow chart of a logic control method of the data center diesel engine parallel machine control system (diesel engine self-starting logic flow) of the invention;
fig. 4 is a flowchart of a logic control method (automatic state logic control method) of the data center diesel engine parallel control system according to the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description is given with reference to the accompanying drawings:
referring to fig. 1 and 2, the data center diesel engine parallel machine control system comprises seven diesel engine sets G1-G7, a set of parallel machine main control cabinet 1, seven incoming line cabinets Q1-Q7, two feeder line cabinets Q8-Q9 and a dummy load test cabinet Q10, the parallel machine main control cabinet 1 comprises a main PLC 11, a standby PLC 12 and a human-machine interface HMI, and a diesel engine main machine controller of each diesel engine set is respectively communicated with the main PLC 11, the standby PLC 12 and the human-machine interface HMI through a serial server 2 and an industrial switch 3; seven incoming line cabinets Q1-Q7, two feeder line cabinets Q8-Q9 and a dummy load test cabinet Q10 are respectively connected with a parallel busbar 13 of the main control cabinet 1 of the diesel engine parallel machine; seven incoming line cabinets Q1-Q7 are connected with seven firewood generating sets G1-G7 in a one-to-one correspondence manner; the main diesel engine controller of each diesel engine set is externally connected with a monitoring background 5 through a serial server 2 and an industrial exchanger 3 in sequence.
Referring to fig. 3 and 4, a logic control method of a data center diesel engine parallel control system includes an automatic state logic control method, where the automatic state logic control method includes a diesel engine self-starting logic flow, a diesel engine stopping logic flow, and a diesel engine remote starting logic flow;
s1, the logic flow of firewood self-starting: the main diesel engine controller of the diesel engine set is arranged in an automatic state, the parallel main control cabinet 1 is arranged in an automatic state, the comprehensive protection equipment of the medium-voltage square bin detects A, B states of two mains supplies and outputs each state of the mains supply to the parallel busbar 13 of the parallel main control cabinet 1 in a dry contact manner, the parallel busbar 13 directly divides a signal of the mains supply into seven parts, the seven parts are correspondingly transmitted to the main diesel engine controllers of seven main diesel engine sets G1-G7 one by one, each main diesel engine controller monitors each received state of the mains supply in real time and performs corresponding actions according to each state of the mains supply:
s11, if the comprehensive protection device of the medium-voltage square cabin sends a A, B mains supply failure state signal, the diesel generator set is directly started to complete parallel operation, electricity is sent to the medium-voltage square cabin, loading is started, and the specific process is as follows: seven firewood generating units G1-G7 are in a competitive on duty mode, the firewood generating host controllers of the seven firewood generating units G1-G7 receive commercial power failure state signals at the same time through a network, all the firewood generating units open shutters firstly and then start, the voltage and the frequency are automatically adjusted to set values after all the firewood generating units are started, the firewood generating unit which reaches the set values firstly is put into the parallel busbar firstly, the firewood generating host controllers of the rest firewood generating units detect the voltage, the frequency and the phase of upper and lower ports of respective parallel machine switches, the frequency and the voltage of the engine of the firewood generating units are automatically tracked, after the window set values and the synchronization time are reached, the corresponding inlet cabinet is instructed to be closed, the automatic synchronization process is finished, and the closing parallel machine is completed; after the primary PLC 11 or the standby PLC 12 of the master control cabinet 1 is combined, two feeder cabinets Q8-Q9 are switched on, and a firewood sending parallel machine control system automatically distributes power to all on-line firewood sending machine sets;
s12, if the comprehensive protection equipment of the medium-voltage square bin sends a commercial power failure signal to be recovered, the firewood generating set maintains a parallel operation state;
s2, a diesel engine shutdown logic flow: the monitoring background 5 issues a diesel engine starting stop command to the parallel operation main control cabinet 1, the whole diesel engine unit is stopped after delay confirmation, the parallel operation main control cabinet automatically disconnects a circuit breaker when the main control cabinet 1 confirms that the power of the diesel engine unit is lower than a set value, the diesel engine unit is disconnected, a diesel engine main controller of the diesel engine unit automatically performs a cooling stop program, and the next cycle is performed after the shutdown;
s3, remote starting logic flow of diesel engine: the diesel engine host controller transmits data to a monitoring background 5 through a serial server 2 and an industrial switch 3, and the monitoring background 5 controls the diesel engine set to start and stop through a network; seven diesel generator sets are communicated with each other, and after receiving a starting command, the seven diesel generator sets are started and automatically complete parallel operation; and after detecting that the parallel operation is finished, the main PLC or the standby PLC of the parallel machine main control cabinet controls the two feeder line cabinets to be switched on.
The human-machine interface HMI does not support SNMP, and the human-machine interface HMI communicates with the monitoring background 5 through the industrial switch 3.
All the diesel engine sets of the diesel engine parallel control system of the data center are N +1 backup, and the parallel completes the closing of six or more inlet cabinets in seven inlet cabinets; when the closing and the parallel operation of six incoming line cabinets corresponding to the six diesel generator sets are completed, the parallel operation main control cabinet, namely a closing feeder cabinet, sends electricity to the medium-voltage square bin and starts to carry load; the diesel engine host controller starts a power control function, the parallel operation main control cabinet detects the total output load, the number of the units is automatically increased or decreased, the percentage of power control can be set within a certain range, and when power transmission is carried out after parallel operation is finished can be set.
The controller of the main engine of the diesel engine adopts MGC-3020(DGC-2020HD) and has the function of parallel operation, and seven diesel engines are communicated in a TCP/IP mode.
The diesel engine self-starting logic flow adopts a distributed control mode and adopts a frequency and voltage synchronous mode to be connected in parallel, the parallel machine main control cabinet communicates with the diesel engine main machine controllers of seven diesel engine units in the whole parallel machine control system through a TCP/IP network of an industrial exchanger, and the frequency and the voltage of each diesel engine unit are automatically adjusted, so that the frequency and the voltage of each diesel engine unit are not influenced by the increase and the decrease of loads and are kept at set values.
The diesel engine generator main machine controller is used for realizing switching-on of a parallel machine and a corresponding inlet wire cabinet, and the parallel machine main control cabinet 1 is used for realizing switching-on and switching-off control of each feeder line cabinet Q8-Q9 and data uploading of the whole diesel engine generator control system;
when both the main PLC 11 and the standby PLC 12 of the parallel main control cabinet 1 have faults, a diesel engine main controller of the diesel engine set receives a mains supply fault signal provided by the integrated protection equipment of the medium-voltage square bin and executes the fault signal according to the diesel engine self-starting logic flow, but the two feeder cabinets Q8-Q9 cannot control switching on; at this time, two feeder cabinets Q8-Q9 need to be manually switched on, electricity is sent to the medium-voltage square cabin, and loading is started.
The logic control method of the data center diesel engine parallel operation control system further comprises a manual state logic control method, the manual state logic control method comprises a manual splitting logic flow, an emergency shutdown logic flow and a manual parallel operation logic flow, wherein:
a, manual splitting logic flow: all the on-line operating firewood generating units are allowed to be manually disconnected, corresponding firewood generating unit stop buttons are triggered in the parallel main control cabinet, the parallel main control cabinet firstly carries out a load transfer process, the power of the disconnected firewood generating units is gradually reduced, after a set value is reached, the corresponding inlet cabinet is automatically disconnected, the corresponding firewood generating units are disconnected, then a firewood generating main machine controller of the firewood generating units automatically carries out a cooling stop program, and the next cycle is carried out after the shutdown;
B. emergency shutdown logic flow: when a shutdown fault occurs to an operating diesel engine set or an emergency shutdown button is pressed, a main control cabinet immediately disconnects a corresponding diesel engine set circuit breaker and controls the diesel engine set to shutdown, if the fault or the emergency shutdown occurs to the side of a parallel main control cabinet, the diesel engine set has no fault, the diesel engine set carries out a cooling shutdown process, the next cycle is carried out after the shutdown, and alarm information is displayed on a human-computer interface of the parallel main control cabinet; if a fault or sudden stop occurs at the side of the diesel engine set, the diesel engine set is immediately stopped, and an alarm is simultaneously displayed on a control screen of a controller of the diesel engine host and a human-computer interface of a parallel machine master control cabinet;
C. the manual parallel operation logic flow comprises the following steps: the main diesel engine controller of the diesel engine set is set in a manual state, the parallel operation main control cabinet is set in the manual state, and the parallel operation main control cabinet does not receive external starting signal control and is manually controlled; when the diesel engine set needs to be started, the diesel engine set is manually started, a switch-on or switch-in button is triggered at the parallel operation main control cabinet, the parallel operation main control cabinet automatically synchronizes and automatically switches on, and the power is automatically distributed after the parallel operation is finished; when the firewood generating set needs to be shut down, the firewood generating set parallel control system cannot be automatically shut down in the working mode, firstly, the set parallel is disconnected, after a shutdown or disconnection button is triggered at the parallel main control cabinet, the corresponding firewood generating set automatically transfers load, when the load is reduced to a set value, the corresponding inlet cabinet is automatically disconnected, the firewood generating set is disconnected, the firewood generating set continues to operate at the moment, and then the firewood generating set is manually shut down.
According to the logic control method of the diesel engine parallel operation control system of the data center, seven diesel engines are in a competition post-starting mode, the unit network receives the starting signal, and after the stable unit is switched on firstly, other units can complete switching-on parallel operation after synchronous parallel operation setting is achieved, so that parallel operation speed is high, and the whole parallel operation system cannot be shut down due to the problem of the control system of a single unit. The firewood sending host machine controller realizes parallel operation (including closing of a corresponding incoming line cabinet), and the parallel operation main control cabinet realizes the control of the closing and opening of a feeder line cabinet and the data uploading of the whole firewood sending system.
The state of two paths of mains supply is detected A, B by the comprehensive protection equipment of the medium-voltage square bin, the state of the mains supply is output to a terminal bar of the parallel machine main control cabinet in a dry contact manner, and a parallel busbar 13 of the main control cabinet 1 directly divides a mains supply state signal into seven by the parallel busbar 13, and the seven mains supply state signals are correspondingly transmitted to the firewood sending host controllers of the seven firewood sending machine sets G1-G7 one by one. The diesel engine host controller monitors the state of the mains supply in real time and performs corresponding actions according to the state of the mains supply. That is to say, A, B two-way mains supply state dry contact is directly transmitted to a diesel engine controller of the diesel engine set.
According to the logic control method of the data center diesel engine parallel machine control system, after 7 diesel engine sets are all operated in parallel, the time can be set in a PLC of the parallel machine main control cabinet 1 through logic programming to start reducing the machine.
When the total load is < X, the X is (n-1) Pe-8011 set value; n is the number of the currently operated diesel generator sets; pe is rated power; 8011 the setting value represents the PM (electric machine) halt storage active value, which can be modified on the human-machine interface HMI; but PM shuts down the time of countdown and human-computer interface HMI to set for, after the delay 30s confirms the back and begins to subtract first firewood and send out the unit, subtract second firewood and send out the unit after 3 ~ 5 seconds, then subtract in proper order, see table 1 for the set value on the human-computer interface HMI when subtracting the machine:
| 8011 | PM shutdown reserve active value | 1212 | 400 | kW | N/V |
| 8012 | Apparent value of PM shutdown reserve | 1213 | 400 | kVA | N/V |
| 8013 | Percentage value of PM shutdown | 1214 | 60 | ％ | N/V |
| 8014 | PM shutdown countdown | 613 | N/V | 30 |
TABLE 1
The shutdown is performed according to the 8011 set point (PM shutdown reserve active value). The principle of machine reduction is generally that the machine is reduced first according to the large ID address (generally the number of a machine set); if the machine needs to be quitted according to the running time, the machine can be set in the PLC program of the parallel machine main control cabinet.
When the total load is larger than X ', X' -n-Pe-8001, setting values; n is the number of the currently operated diesel generator sets; pe is rated power; 8001, the set value represents a PM startup and standby active value which can be modified on a human-computer interface HMI; the time of PM machine-starting countdown can be set in a human-computer interface HMI, for example, the time is delayed for 5s to confirm, after a first diesel engine set is increased, a second diesel engine set is increased after 3-5 seconds, then the machines are sequentially increased, and the set values on the human-computer interface HMI are shown in a table 2 when the machines are increased:
| 8001 | PM startup storage active value | 1209 | 200 | kW | N/A |
| 8002 | Apparent value of PM starting reserve | 1210 | 200 | kVA | N/A |
| 8003 | Percentage value of PM starting | 1211 | 80 | ％ | N/A |
| 8004 | PM start countdown | 611 | N/A | 5 |
TABLE 2
And if the confirmation time, the starting time and the synchronization time are counted, adding one firewood generating set within about 30s to carry out parallel operation.
The logic control method of the data center diesel engine parallel machine control system of the invention sets the machine increase and decrease according to the reserve power method:
(1) when increasing units, please refer to table 2, assume that 1 diesel generator unit is started, Pe equals 2000kW, 8001 sets 200kW, and when the total load > X', X equals 2000-;
(2) the machine reduction adopts an N-1 principle: referring to table 1, assuming that 2 diesel engine units are operated, Pe is 2000kW, 8011 is 400kW, and when the total load is X, X is (2-1) × 2000 and 400 (which may be set on the HMI) is 1600kW, one engine is reduced.
In summary, the logic control method of the data center diesel engine parallel operation control system adopts a distributed control mode, is a competitive post-working mode, and after the stable unit is switched on firstly, other units can complete switching-on parallel operation after synchronous parallel operation setting is achieved, the parallel operation speed is higher, the failure of the whole parallel operation system due to the control system problem of a single unit is avoided, the fault of one unit does not affect the whole parallel operation control system, and the fault can be conveniently processed in operation.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. The logic control method of the data center diesel engine parallel control system is characterized in that the data center diesel engine parallel control system comprises seven diesel engine generator sets, a set of parallel main control cabinet, seven incoming line cabinets, two feeder cabinets and a dummy load test cabinet, the parallel main control cabinet comprises a main PLC, a standby PLC and a human-computer interface, and a diesel engine main controller of each diesel engine generator set is respectively communicated with the main PLC, the standby PLC and the human-computer interface sequentially through a serial server and an industrial switch; the seven incoming line cabinets, the two feeder cabinets and the dummy load test cabinet are respectively connected with a parallel busbar of the main control cabinet of the diesel engine parallel generator; the seven incoming line cabinets are connected with the seven firewood generating units in one-to-one correspondence; a main diesel engine controller of each diesel engine unit is externally connected with a monitoring background through a serial server and an industrial exchanger in sequence;
the logic control method comprises an automatic state logic control method, the automatic state logic control method comprises a diesel self-starting logic flow, a diesel stopping logic flow and a diesel remote starting logic flow, wherein:
s1, the logic flow of firewood self-starting: the main engine controller is set up in automatic state, and the parallel operation master control cabinet sets up in automatic state, and the comprehensive protection equipment in middling pressure square storehouse detects two way mains supply states to export every way mains supply state with the form of dry contact to the parallel busbar of parallel operation master control cabinet, and the parallel busbar directly divide this mains supply state signal into seven one, and the one-to-one ground is given the main engine controller is sent to seven firewood of firewood generator group, and every firewood generator controller real-time supervision every way mains supply state received, and does corresponding action according to every way mains supply state:
s11, if the comprehensive protection equipment of the medium-voltage square cabin sends a failure state signal of the mains supply, the diesel generator set is directly started to complete parallel operation, electricity is sent to the medium-voltage square cabin, loading is started, and the specific flow is as follows: seven firewood generating sets are in a competition on duty mode, firewood generating host controllers of the seven firewood generating sets receive commercial power failure state signals through a network at the same time, all the firewood generating sets open shutters at first and then start, the voltage and the frequency are automatically adjusted to be set values after all the firewood generating sets start, the firewood generating set which reaches the set values at first is put into the parallel busbar at first, the firewood generating host controllers of the rest firewood generating sets detect the upper and lower port voltage, the frequency and the phase of the respective parallel switch, the frequency and the voltage of the engine of the firewood generating sets are automatically tracked, after the window set values and the synchronization time are reached, the corresponding inlet wire cabinets are commanded to be closed, the automatic synchronization process is finished, and closing parallel operation is completed; after the primary PLC or the standby PLC of the master control cabinet completes the parallel operation, the two feeder cabinets are switched on, and the power is automatically distributed to all the on-line firewood generating units by the firewood generating parallel operation control system;
s12, if the comprehensive protection equipment of the medium-voltage square cabin sends a commercial power failure signal to be recovered, the firewood generator set maintains a parallel operation state;
s2, a diesel engine shutdown logic flow: a monitoring background issues a firewood sending shutdown command to a parallel operation main control cabinet, after delay confirmation, the whole firewood sending unit is subjected to a shutdown process, when the parallel operation main control cabinet confirms that the power of the firewood sending unit is lower than a set value, the parallel operation main control cabinet automatically disconnects a circuit breaker, the firewood sending unit is disconnected, a firewood sending host controller of the firewood sending unit automatically performs a cooling shutdown program, and the next cycle is performed after shutdown;
s3, a logic flow of remote start of firewood: the diesel engine host controller transmits data to a monitoring background through a serial server and an industrial switch, and the monitoring background controls the diesel engine set to start and stop through a network; seven diesel generator sets are communicated with each other, and after receiving a starting command, the seven diesel generator sets are started and automatically complete parallel operation; and after detecting that the parallel operation is finished, the main PLC or the standby PLC of the parallel machine main control cabinet controls the two feeder line cabinets to be switched on.
2. The logic control method of the data center diesel engine parallel machine control system according to claim 1, wherein the human-computer interface is communicated with the monitoring background through an industrial switch.
3. The logic control method of the diesel engine parallel machine control system of the data center according to claim 1, characterized in that the parallel machine completes the closing of six or more incoming line cabinets in seven incoming line cabinets; when the closing and parallel operation of six incoming line cabinets corresponding to the six diesel generator sets are completed, the parallel operation main control cabinet, namely a closing feeder cabinet, sends electricity to the medium-voltage square bin and starts to carry load; the power control function is started by the diesel engine host controller, the total output load is detected by the engine main control cabinet, and the number of the units is automatically increased or decreased.
4. The logic control method of the data center diesel engine parallel operation control system according to claim 1, characterized in that the diesel engine self-starting logic flow adopts a distributed control mode, adopts a frequency and voltage synchronization mode to be connected in parallel, and the parallel operation main control cabinet communicates the diesel engine main controllers of seven diesel engine sets in the whole parallel operation control system through a TCP/IP network of an industrial switch, automatically adjusts the frequency and voltage of each diesel engine set, is not affected by the increase and decrease of the load, and is kept at a set value;
the main control cabinet of the parallel machine is used for realizing the switching-on of each feeder cabinet and the switching-off control of each feeder cabinet and the data uploading of the whole diesel engine parallel machine control system;
when the main PLC and the standby PLC of the parallel main control cabinet are both in failure, the diesel engine controller of the diesel engine unit receives a mains supply failure signal provided by the integrated protection equipment of the medium-voltage square bin, the commercial supply failure signal can be executed according to the diesel engine self-starting logic flow, but the two feeder cabinets cannot control switching on; at the moment, two feeder cabinets are manually switched on, electricity is transmitted to the medium-voltage square bin, and loading is started.
5. The logic control method of the data center diesel engine parallel machine control system according to claim 1, characterized in that the logic control method further comprises a manual state logic control method, the manual state logic control method comprises a manual disconnection logic flow, an emergency shutdown logic flow and a manual parallel machine operation logic flow, wherein:
a, manually splitting logic flow: all the on-line operating diesel engine units allow manual disconnection, corresponding diesel engine unit stop buttons are triggered in the parallel main control cabinet, the parallel main control cabinet firstly carries out a load transfer process, the power of the disconnected diesel engine units is gradually reduced, the corresponding inlet cabinets are automatically disconnected after a set value is reached, the corresponding diesel engine units are disconnected, then a diesel engine main controller of the diesel engine units automatically carries out a cooling stop program, and the next cycle is carried out after the shutdown;
B. emergency shutdown logic flow: when a shutdown fault occurs to an operating diesel generator set or an emergency shutdown button is pressed, a main control cabinet immediately disconnects a corresponding diesel generator set circuit breaker and controls the diesel generator set to shutdown, if the fault or emergency shutdown occurs to the side of a parallel main control cabinet and the diesel generator set has no fault, the diesel generator set carries out a cooling shutdown process, next circulation is carried out after shutdown, and alarm information is displayed on a human-computer interface of the parallel main control cabinet; if a fault or sudden stop occurs at the side of the diesel engine set, the diesel engine set is immediately stopped, and an alarm is simultaneously displayed on a control screen of a controller of the diesel engine host and a human-computer interface of a parallel machine master control cabinet;
C. the manual parallel operation logic flow comprises the following steps: the main diesel engine controller of the diesel engine set is set in a manual state, the parallel operation main control cabinet is set in the manual state, and the parallel operation main control cabinet does not receive external starting signal control and is manually controlled; when the diesel engine set needs to be started, the diesel engine set is manually started, a switch-on or switch-in button is triggered at the parallel operation main control cabinet, the parallel operation main control cabinet automatically synchronizes and automatically switches on, and the power is automatically distributed after the parallel operation is finished; when the firewood sending unit is required to be shut down, the firewood sending parallel machine control system cannot be automatically shut down in the working mode, firstly, the unit is disconnected, after a shutdown or disconnection button is triggered at the parallel machine main control cabinet, the corresponding firewood sending unit automatically transfers load, when the load is reduced to a set value, the corresponding inlet cabinet is automatically disconnected, the firewood sending unit is disconnected, the firewood sending unit continues to operate at the moment, and then, the firewood sending unit is manually shut down.
6. The logic control method of the diesel engine parallel operation control system of the data center according to claim 1, characterized in that after all the 7 diesel engine sets are operated in parallel, the reduction is started when the total load is less than X, and X is (n-1) Pe-8011 set value; n is the number of the currently operated diesel generators; pe is rated power; the 8011 setting value represents the PM shutdown reserve active value; setting the magnitude of a PM shutdown storage active value and the time of PM shutdown countdown on a human-computer interface; when the unit is reduced, the unit number is reduced first or the running time is reduced first.
7. The logic control method of the data center diesel engine parallel machine control system according to claim 1, characterized in that the machine increase is performed when the total load is greater than X ', X' n Pe-8001 is set; n is the number of the currently operated diesel generators; pe is rated power; 8001 the set value indicates a PM startup storage availability value; and setting the magnitude of the stored active value of the PM start-up and the time of the PM start-up countdown on the human-computer interface.
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| CN115370472A (en) * | 2022-07-25 | 2022-11-22 | 福建永强力加动力设备有限公司 | Full-load peak regulation and dynamic redundancy control system of generator set for large-scale data center |
| CN115370472B (en) * | 2022-07-25 | 2023-10-27 | 福建永强力加动力设备有限公司 | Full-load peak regulation and dynamic redundancy control system of generator set for large data center |
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