CN105071432A - Diesel generator parallel control apparatus - Google Patents
Diesel generator parallel control apparatus Download PDFInfo
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- CN105071432A CN105071432A CN201510461567.3A CN201510461567A CN105071432A CN 105071432 A CN105071432 A CN 105071432A CN 201510461567 A CN201510461567 A CN 201510461567A CN 105071432 A CN105071432 A CN 105071432A
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Abstract
The invention relates to a diesel generator control apparatus and specifically relates to a diesel generator parallel control apparatus, for solving the defects and problems generated when a conventional diesel generator controller employs a distributed control mode to acquire and control multiple diesel generators by use of one controller. According to the diesel generator parallel control apparatus, each controller individually controls one diesel generator, and each controller employs a control mode of a bus structure. One onsite bus communication module and one phase detection module are additionally arranged on the basis of conventional controller hardware. In terms of software, a set starts by use of a fault rearrangement method, distributes power equally according to a power distribution algorithm during power distribution and employs both a set load shutdown mode and a power restoration shutdown mode during a shutdown, when a circuit breaker between the diesel generators and a diesel generator bus is open or closed, it should be confirmed that the controllers are at normal working states, and a circuit breaker between a power network and a load employs an independent execution module. Great convenience is provided for capacity increase or capacity reduction of a system.
Description
Technical field
The present invention relates to controller for diesel-driven generator, be specially diesel engine generator parallel control device.
Background technology
Along with steadily improving of national economy, increasing department has higher requirement to power supply continuity.Existing diesel generator controller generally can meet unit or two-shipper control overflow, the above system of two-shipper needs the controller of design specialized, control system many employings distribute control mode (controller controls multiple stage diesel engine generator), its using state figure is (for three machines) as shown in Figure 1, and its cut-away view as shown in Figure 2.Existing controller comprises processor, the input of processor is connected with the electrical network measurement module for gathering electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency, the voltage (D for gather each diesel engine generator corresponding with each diesel engine generator
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature t
k, oil pressure p
k, rotating speed n
kdiesel engine generator measurement module, for gathering the phase detecting module of electrical network bus and each diesel engine generator phase difference, processor has the ASR(diesel engine generator speed regulator corresponding with each diesel engine generator) speed governing output, AVR(diesel engine generator voltage regulator) pressure regulation output (unit controller is not containing ASR speed governing output and AVR pressure regulation output), be connected with simultaneously and comprise electrical network bus circuit breaker, the Executive Module of the diesel generating set bus circuit breaker (be called for short unit bus circuit breaker) corresponding with each diesel engine generator, the contact of electrical network bus circuit breaker is connected between electrical network bus and load, the contact of each unit bus circuit breaker is connected between corresponding diesel engine generator and unit bus, processor is also connected with upper machine communication bus, to realize remote measurement.
This controller is arranged on by diesel engine generator, by internal measurement device monitoring diesel engine generator and electric network state, and sends action or guarded command according to the state of electrical network and diesel engine generator, controls the start and stop of diesel engine generator and the folding of circuit breaker.Its concrete control flow is: when line voltage is less than set point, and diesel engine generator starts; Start successfully, diesel generating set parallel connection is powered to load, and mean allocation power (one-of-a-kind system is directly powered, and does not need mean allocation power); After power system restoration is powered, diesel generating set first stops powering to load recovering electrical network again and powering to the load.Diesel engine generator and electric network state are in real time in control screen display.Situations such as if diesel engine generator are once occur inverse probability, and oil temperature, oil pressure, rotating speed, voltage, electric current are too high or too low, controller sends guarded command to diesel engine generator immediately, makes diesel engine generator complete corresponding protection act.
Because existing diesel generator controller is distribute control mode, itself and each diesel engine generator form a closed system, do not have, with the interface of other controller communication, not change the interface of internal processes, the information that this system obtains cannot pass to other controller, can only be interactive with host computer.When whole system expansion capacity, the hardware configuration of controller can not control the unit newly increased, must the more more controller of alias again; When system reduces capacity, original multiple air combat device program has cured, and can not change, can only change diesel generator controller.During each increase and decrease diesel engine generator number of units, system main electrical scheme also must change.Otherwise original main electrical scheme can not adapt to new system.
Adopt cluster sampling mode during diesel generator controller sampled data, control multiple diesel engine generator by a controller collection.When system is multimachine system, controller sampled data is many, and control signal sends frequently.The data of diesel engine generator can not be sampled simultaneously, cause time delay, cause increasing system status monitoring time delay.
Summary of the invention
The present invention solves existing diesel generator controller and adopts a controller collection and the defect that produces of the distribute control mode controlling multiple diesel engine generator and problem, provides a kind of diesel engine generator parallel control device.This control device is that every platform diesel engine generator is equipped with a controller, and every platform controller controls separately a diesel engine generator.
The present invention adopts following technical scheme to realize: diesel engine generator parallel control device, comprises multiple controller, and every platform controller controls separately a diesel engine generator; Also comprise an Executive Module pb containing electrical network bus circuit breaker, the contact of the electrical network bus circuit breaker in it is connected between electrical network bus and load; Described controller comprises processor, and the input of processor is connected with the electrical network measurement module for gathering electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency, the voltage (D of control diesel engine generator for gathering
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature t
k, oil pressure p
k, rotating speed n
kmeasurement module, for gathering the first phase detection module of electrical network bus and institute's control diesel engine generator phase difference, the second phase detection module of the synchronizing signal phase difference that control diesel engine generator and processor export for gathering; Processor controls ASR speed governing output, the AVR pressure regulation output of diesel engine generator to some extent, be connected with simultaneously and comprise unit bus circuit breaker and the Executive Module exporting the Executive Module pb signal controlled containing electrical network bus circuit breaker, the contact of unit bus circuit breaker is connected between controlled diesel engine generator and unit bus; Processor is also connected with field bus communication module and upper machine communication bus module; Multiple controller, is connected on upper communication bus by respective upper machine communication bus module by respective field bus communication model calling in local communication bus.
Control software design needed for the processor of controller is realized by following control method, and described control method comprises the steps:
1) determine controller numbering a during Bootload, different controller, by changing the value of a during loading procedure, determining the numbering of each controller, thus determining the initial condition of controller;
2) power on beginning;
3) director demon carries out Initialize installation;
4) electrical network normal power supply, controller gathers the voltage (D of electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency and institute's control diesel engine generator
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature t
k, oil pressure p
k, rotating speed n
k; Line voltage is rated value, and institute's control diesel engine generator does not start, and its voltage, electric current, frequency, tachometer value are zero, and oil temperature, oil pressure are at certain initial value; Send this initial condition signal to local communication bus (to comprise aforesaid controller numbering a), send the initial condition signal that other controllers of wait-receiving mode send;
5) judge that whether electrical network busbar voltage is lower than 70% of rated voltage; If not, then think that system is in initial condition; If so, assert grid cut-off, number minimum controller and send control signal to the Executive Module pb containing electrical network bus circuit breaker, electrical network bus circuit breaker is disconnected, realize disconnecting the connection between electrical network and load; Controller sends power cut signal to local communication bus, and receives the power cut signal that other controller sends;
6) according to before grid cut-off, the load power P that controller calculates
load, calculating diesel engine generator should start number of units n:
, P
τ, ifor the unit rated power of diesel engine generator, n round numbers; When guaranteeing to be with dynamic load completely, the surplus of at least one machine is kept to be in stand-by state;
7) number of units should be started and whether be greater than present unit not bad number of units (according to the initial condition signal in local communication bus, bad diesel engine generator does not send initial condition signal), if so, then re-start number of units and calculate; If not, whether controller numbering a is less than or equal to should start number of units n, if so, starts the diesel engine generator that this controller is controlled, if not, does not then start, thus realizes, according to the ascending order of numbering, starting diesel engine generator; Send starting state signal with Time Controller to local communication bus, and receive the starting state signal that other controllers in local communication bus send;
8) diesel engine generator startup whether successful (judgement such as its voltage, electric current, rotating speed from gathering back), if not success, and the number of starts is less than three times, so return step 7, if restarted three times, quit work immediately, and send fault-signal to local communication bus, next diesel engine generator that meanwhile should start maximum numbering in number of units starts, and send this machine starting state signal to local communication bus, operating controller numbering after simultaneous faults machine subtracts 1 automatically, guarantees that operating unit numbering is arranged in order by ascending;
9) all diesel engine generators started are adjusted to rated no-load state (by calculating voltage and set-point difference, rotating speed and no-load speed difference, to the ASR speed governing output of processor, AVR pressure regulation output sends signal, adjust to rated no-load state), number minimum controller in running simultaneously and send synchronizing signal instruction to local communication bus, making the processor of all controllers in operation send a frequency is the square wave of 50Hz, as the synchronizing signal needed for second phase detection module, and send to local communication bus and start pass signal and receive the startup pass signal that other controllers in local communication bus send simultaneously,
10) institute's control diesel engine generator voltage, electric current and the rotating speed of being returned by controller collection and given unloaded rated value are compared, and judge whether institute's control diesel engine generator reaches rated no-load state, if not, repeat step 9), if so, wait for parallel operation;
11) if the voltage of operating diesel engine generator, frequency and meet condition for parallel connection with synchronizing signal phase difference, instruction is sent to its Executive Module, make the unit bus breaker points close in it, realize and car, and to local communication bus send and car pass signal receive that other controllers in local communication bus send simultaneously and car pass signal, otherwise (namely not sending and car pass signal), quit work immediately, and send fault-signal to local communication bus, meanwhile next diesel engine generator of operating maximum numbering starts and car, and to local communication bus send this machine start and and car signal, and the operating controller numbering after the unsuccessful unit of car subtracts 1 automatically, guarantees that operating unit numbering is arranged in order by ascending,
12) generating set independence run with load, gather operating diesel engine generator voltage and current value and draw its power, calculate the difference sP of active power ratio that operating separate unit diesel engine generator bears and total active power ratio that all operating diesel engine generators are born
, n is that diesel engine generator should start number of units (the diesel engine generator number of units in parallel running); I is the mark of arbitrary in the diesel engine generator in all parallel runnings; P
ifor the active power that operating separate unit diesel engine generator is born; P
τ, ifor the specified active power of separate unit generator; The ASR speed governing output end signal of institute's control diesel engine generator of processor meets
, wherein R is the speed in percentage count rate of descent of diesel engine generator, and the rotating speed-meritorious curve characteristic according to diesel engine generator draws:
, complete power adjustment, make the active power of output of operating diesel engine generator identical; Simultaneously send free band information carrying number to local communication bus, and receive the free band information carrying number that other controllers in local communication bus send;
13) if load
reduce, satisfy condition:
, send stopping signal to local communication bus, receive the stopping signal that in local communication bus, other controllers send simultaneously;
14) the ASR speed governing output of numbering maximum controller in running exports speed-regulating signal, make this controller control diesel engine generator power output be zero, then send signal to its Executive Module the contact of its unit bus circuit breaker disconnected; Repeat step 12), power is mean allocation again;
15) when electrical network bus restores electricity, send stopping signal to local communication bus, receive the stopping signal that in local communication bus, other controllers send simultaneously; Corresponding signal is sent by the ASR speed governing output of processor, AVR pressure regulation output, make the voltage of all operating diesel engine generators, frequency consistent with electrical network bus, when unit bus phase place is consistent with electrical network bus phase place, namely when first phase detection module phase difference output is the corresponding signal of zero, control signal is sent to the Executive Module pb containing electrical network bus circuit breaker by numbering minimum controller in operation, make the closing of contact of electrical network bus circuit breaker, realize anti-grid-connected; Send anti-grid-connected signal to local communication bus, receive the anti-grid-connected signal that in local communication bus, other controllers send simultaneously;
16) the ASR speed governing output of processor sends speed-regulating signal, the power output of operating diesel engine generator is made to be zero, sending signal to its Executive Module again makes the contact of its unit bus circuit breaker disconnect, and send diesel engine generator off-the-line status signal to local communication bus, receive the off-the-line status signal that in local communication bus, other controllers send;
17) off-the-line completes, and unit returns to initial condition.
The present invention increases a field bus communication module on existing controller hardware foundation, increases a phase detecting module.On software; fault rearrangement method is adopted during unit starting; according to power distribution algorithm mean allocation power during power division; unit load is divided into shut down during shutdown and incoming call shutdown two kinds of modes; need to confirm that this controller is in normal operating conditions during circuit breaker between folding diesel engine generator and diesel engine generator bus, the circuit breaker between electrical network and load adopts an independently Executive Module.Control device of the present invention is obtained by the improvement of software and hardware.
Diesel engine generator parallel control device of the present invention have employed every platform controller and controls separately to be bus-structured control mode between a diesel engine generator, each controller.When whole system expansion capacity or when reducing capacity, its hardware configuration is substantially constant, only need increase and decrease amount controller in bus, on unit bus, increase and decrease diesel engine generator quantity; Control software design only need do simple adjustment (mainly the adjustment of the initial set value such as controller numbering a, diesel engine generator nominal parameter).Grid-connected (connection) that the present invention is particularly useful for multiple stage diesel engine generator controls, and for system increase-volume or subtract appearance and provide great convenience, and avoids waste.
Accompanying drawing explanation
Fig. 1 is the using state figure of existing diesel generator controller;
Fig. 2 is the internal structure schematic diagram of existing diesel generator controller;
Fig. 3 is the structure principle chart of diesel engine generator parallel control device of the present invention;
Fig. 4 is the internal structure schematic diagram of diesel engine generator parallel control device controller of the present invention;
Fig. 5,6 is control method flow chart of the present invention.
Embodiment
Diesel engine generator parallel control device, comprises multiple controller, and every platform controller controls separately a diesel engine generator; Also comprise an Executive Module pb containing electrical network bus circuit breaker, the contact of the electrical network bus circuit breaker in it is connected between electrical network bus and load; Described controller comprises processor, and the input of processor is connected with the electrical network measurement module for gathering electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency, the voltage (D of control diesel engine generator for gathering
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature t
k, oil pressure p
k, rotating speed n
kmeasurement module, for gathering the first phase detection module of electrical network bus and institute's control diesel engine generator phase difference, the second phase detection module of the synchronizing signal phase difference that control diesel engine generator and processor export for gathering; Processor controls ASR speed governing output, the AVR pressure regulation output of diesel engine generator to some extent, is connected with simultaneously and comprises unit bus circuit breaker and the Executive Module exporting the Executive Module pb signal controlled containing electrical network bus circuit breaker, the contact db of unit bus circuit breaker
kbe connected between controlled diesel engine generator and unit bus; Processor is also connected with field bus communication module and upper machine communication bus module; Multiple controller, is connected on upper communication bus by respective upper machine communication bus module by respective field bus communication model calling in local communication bus.
Control software design needed for the processor of controller is realized by following control method, and described control method comprises the steps:
1) determine controller numbering a during Bootload, different controller, by changing the value of a during loading procedure, determining the numbering of each controller, thus determining the initial condition of controller;
2) power on beginning;
3) director demon carries out Initialize installation;
4) electrical network normal power supply, controller gathers the voltage (D of electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency and institute's control diesel engine generator
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature t
k, oil pressure p
k, rotating speed n
k; Line voltage is rated value, and institute's control diesel engine generator does not start, and its voltage, electric current, frequency, tachometer value are zero, and oil temperature, oil pressure are certain initial value; Send this initial condition signal to local communication bus (to comprise aforesaid controller numbering a), and receive the initial condition signal of other controllers transmission;
5) judge that whether electrical network busbar voltage is lower than 70% of rated voltage; If not, then think that system is in initial condition; If, assert grid cut-off, number minimum controller and send control signal to the Executive Module pb containing electrical network bus circuit breaker, electrical network bus circuit breaker is disconnected, and (controller is not activated, state during maintenance end of run last time), realize disconnecting the connection between electrical network and load; Controller sends power cut signal to local communication bus, and receives the power cut signal that other controller sends;
6) according to before grid cut-off, the load power P that controller calculates
load, calculating diesel engine generator should start number of units n:
, P
τ, ifor the unit rated power of diesel engine generator, n round numbers; When guaranteeing to be with dynamic load completely, the surplus of at least one machine is kept to be in stand-by state;
7) number of units should be started and whether be greater than present unit not bad number of units (according to the initial condition signal in local communication bus, bad diesel engine generator does not send initial condition signal), if so, then re-start number of units and calculate; If not, whether controller numbering a is less than or equal to should start number of units n, if so, starts the diesel engine generator that this controller is controlled, if not, does not then start, thus realizes, according to the ascending order of numbering, starting diesel engine generator; Send starting state signal with Time Controller to local communication bus, and receive the starting state signal that other controllers in local communication bus send;
8) diesel engine generator startup whether successful (judgement such as its voltage, electric current, rotating speed from gathering back), if not success, and the number of starts is less than three times, so return step 7, if restarted three times, quit work immediately, and send fault-signal to local communication bus, next diesel engine generator that meanwhile should start maximum numbering in number of units starts, and send this machine starting state signal to local communication bus, operating controller numbering after simultaneous faults machine subtracts 1 automatically, guarantees that operating unit numbering is arranged in order by ascending;
9) all diesel engine generators started are adjusted to rated no-load state (by calculating voltage and set-point difference, rotating speed and no-load speed difference, to the ASR speed governing output of processor, AVR pressure regulation output sends signal, adjust to rated no-load state), number minimum controller in running simultaneously and send synchronizing signal instruction to local communication bus, making the processor of all controllers in operation send a frequency is the square wave of 50Hz, as the synchronizing signal needed for second phase detection module, and send to local communication bus and start pass signal and receive the startup pass signal that other controllers in local communication bus send simultaneously,
10) institute's control diesel engine generator voltage, electric current and the rotating speed of being returned by controller collection and given unloaded rated value are compared, and judge whether institute's control diesel engine generator reaches rated no-load state, if not, repeat step 9), if so, wait for parallel operation;
11) if the voltage of operating diesel engine generator, frequency and meet condition for parallel connection with synchronizing signal phase difference, instruction is sent to its Executive Module, make the unit bus breaker points close in it, realize and car, and to local communication bus send and car pass signal receive that other controllers in local communication bus send simultaneously and car pass signal, otherwise (namely not sending and car pass signal), quit work immediately, and send fault-signal to local communication bus, meanwhile next diesel engine generator of operating maximum numbering starts and car, and to local communication bus send this machine start and and car signal, and the operating controller numbering after the unsuccessful unit of car subtracts 1 automatically, guarantees that operating unit numbering is arranged in order by ascending,
12) generating set independence run with load, gather operating diesel engine generator voltage and current value and draw its power, calculate the difference sP of active power ratio that operating separate unit diesel engine generator bears and total active power ratio that all operating diesel engine generators are born
, n is that diesel engine generator should start number of units (the diesel engine generator number of units in parallel running); I is the mark of arbitrary in the diesel engine generator in all parallel runnings; P
ifor the active power that operating separate unit diesel engine generator is born; P
τ, ifor the specified active power of separate unit generator; The ASR speed governing output end signal of institute's control diesel engine generator of processor meets
, wherein R is the speed in percentage count rate of descent of diesel engine generator, and the rotating speed-meritorious curve characteristic according to diesel engine generator draws:
, complete power adjustment, make the active power of output of operating diesel engine generator identical; Simultaneously send free band information carrying number to local communication bus, and receive the free band information carrying number that other controllers in local communication bus send;
13) if load
reduce, satisfy condition:
, send stopping signal to local communication bus, receive the stopping signal that in local communication bus, other controllers send simultaneously;
14) the ASR speed governing output of numbering maximum controller in running exports speed-regulating signal, make this controller control diesel engine generator power output be zero, then send signal to its Executive Module the contact of its unit bus circuit breaker disconnected; Repeat step 12), power is mean allocation again;
15) when electrical network bus restores electricity, send stopping signal to local communication bus, receive the stopping signal that in local communication bus, other controllers send simultaneously; Corresponding signal is sent by the ASR speed governing output of processor, AVR pressure regulation output, make the voltage of all operating diesel engine generators, frequency consistent with electrical network bus, when unit bus phase place is consistent with electrical network bus phase place, namely when first phase detection module phase difference output is the corresponding signal of zero, control signal is sent to the Executive Module pb containing electrical network bus circuit breaker by numbering minimum controller in operation, make the closing of contact of electrical network bus circuit breaker, realize anti-grid-connected; Send anti-grid-connected signal to local communication bus, receive the anti-grid-connected signal that in local communication bus, other controllers send simultaneously;
16) the ASR speed governing output of processor sends speed-regulating signal, the power output of operating diesel engine generator is made to be zero, sending signal to its Executive Module again makes the contact of its unit bus circuit breaker disconnect, and send diesel engine generator off-the-line status signal to local communication bus, receive the off-the-line status signal that in local communication bus, other controllers send;
17) off-the-line completes, and unit returns to initial condition.
Claims (1)
1. a diesel engine generator parallel control device, is characterized in that, comprises multiple controller, and every platform controller controls separately a diesel engine generator; Also comprise an Executive Module (pb) containing electrical network bus circuit breaker, the contact of the electrical network bus circuit breaker in it is connected between electrical network bus and load; Described controller comprises processor, and the input of processor is connected with the electrical network measurement module for gathering electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency, the voltage (D of control diesel engine generator for gathering
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature (t
k), oil pressure (p
k), rotating speed (n
k) measurement module, for gathering the first phase detection module of electrical network bus and institute's control diesel engine generator phase difference, the second phase detection module of the synchronizing signal phase difference that control diesel engine generator and processor export for gathering; Processor controls ASR speed governing output, the AVR pressure regulation output of diesel engine generator to some extent, be connected with simultaneously and comprise unit bus circuit breaker and the Executive Module exporting Executive Module (pb) signal controlled containing electrical network bus circuit breaker, the contact (db of unit bus circuit breaker
k) be connected between controlled diesel engine generator and unit bus; Processor is also connected with field bus communication module and upper machine communication bus module; Multiple controller in local communication bus, is connected to upper communication bus on by respective upper machine communication bus module by respective field bus communication model calling;
Control software design needed for the processor of controller is realized by following control method, and described control method comprises the steps:
1) determine controller numbering a during Bootload, different controller, by changing the value of a during loading procedure, determining the numbering of each controller, thus determining the initial condition of controller;
2) power on beginning;
3) director demon carries out Initialize installation;
4) electrical network normal power supply, controller gathers the voltage (D of electrical network busbar voltage (VA, VB, VC), electric current (IA, IB, IC), frequency and institute's control diesel engine generator
ka, D
kb, D
kc), electric current (I
ka, I
kb, I
kc), frequency, oil temperature (t
k), oil pressure (p
k), rotating speed (n
k); Line voltage is rated value, and institute's control diesel engine generator does not start, and its voltage, electric current, frequency, tachometer value are zero, and oil temperature, oil pressure are certain initial value; Send this initial condition signal to local communication bus, and receive the initial condition signal of other controllers transmission;
5) judge that whether electrical network busbar voltage is lower than 70% of rated voltage; If not, then think that system is in initial condition; If so, assert grid cut-off, number minimum controller and send control signal to the Executive Module (pb) containing electrical network bus circuit breaker, electrical network bus circuit breaker is disconnected, realize disconnecting the connection between electrical network and load; Controller sends power cut signal to local communication bus, and receives the power cut signal that other controller sends;
6) according to before grid cut-off, the load power P that controller calculates
load, calculating diesel engine generator should start number of units n:
, P
τ, ifor the unit rated power of diesel engine generator, n round numbers;
7) number of units should be started and whether be greater than present unit not bad number of units, if so, then re-start number of units and calculate; If not, whether controller numbering a is less than or equal to should start number of units n, if so, starts the diesel engine generator that this controller is controlled, if not, does not then start, thus realizes, according to the ascending order of numbering, starting diesel engine generator; Send starting state signal with Time Controller to local communication bus, and receive the starting state signal that other controllers in local communication bus send;
8) whether diesel engine generator starts successful, if not success, and the number of starts is less than three times, so returns step 7), if restarted three times, quit work immediately, and sending fault-signal to local communication bus, next diesel engine generator that meanwhile should start maximum numbering in number of units starts, and sends this machine starting state signal to local communication bus, operating controller numbering after simultaneous faults machine subtracts 1 automatically, guarantees that operating unit numbering is arranged in order by ascending;
9) all diesel engine generators started are adjusted to rated no-load state, number minimum controller in running simultaneously and send synchronizing signal instruction to local communication bus, making the processor of all controllers in operation send a frequency is the square wave of 50Hz, as the synchronizing signal needed for second phase detection module, and send to local communication bus and start pass signal and receive the startup pass signal that other controllers in local communication bus send simultaneously;
10) institute's control diesel engine generator voltage, electric current and the rotating speed of being returned by controller collection and given unloaded rated value are compared, and judge whether institute's control diesel engine generator reaches rated no-load state, if not, repeat step 9), if so, wait for parallel operation;
11) if the voltage of operating diesel engine generator, frequency and meet condition for parallel connection with synchronizing signal phase difference, instruction is sent to its Executive Module, make the unit bus breaker points close in it, realize and car, and to local communication bus send and car pass signal receive that other controllers in local communication bus send simultaneously and car pass signal, otherwise, quit work immediately, and send fault-signal to local communication bus, meanwhile next diesel engine generator of operating maximum numbering starts and car, and to local communication bus send this machine start and and car signal, and the operating controller numbering after the unsuccessful unit of car subtracts 1 automatically, guarantees that operating unit numbering is arranged in order by ascending,
12) generating set independence run with load, gather operating diesel engine generator voltage and current value and draw its power, calculate the difference sP of active power ratio that operating separate unit diesel engine generator bears and total active power ratio that all operating diesel engine generators are born
, n is that diesel engine generator should start number of units; I is the mark of arbitrary in the diesel engine generator in all parallel runnings; P
ifor the active power that operating separate unit diesel engine generator is born; P
τ, ifor the specified active power of separate unit generator; The ASR speed governing output end signal of institute's control diesel engine generator of processor meets
, wherein R is the speed in percentage count rate of descent of diesel engine generator, completes power adjustment, makes the active power of output of operating diesel engine generator identical; Simultaneously send free band information carrying number to local communication bus, and receive the free band information carrying number that other controllers in local communication bus send;
13) if load
reduce, satisfy condition:
, send stopping signal to local communication bus, receive the stopping signal that in local communication bus, other controllers send simultaneously;
14) the ASR speed governing output of numbering maximum controller in running exports speed-regulating signal, make this controller control diesel engine generator power output be zero, then send signal to its Executive Module the contact of its unit bus circuit breaker disconnected; Repeat step 12), power is mean allocation again;
15) when electrical network bus restores electricity, send stopping signal to local communication bus, receive the stopping signal that in local communication bus, other controllers send simultaneously; Corresponding signal is sent by the ASR speed governing output of processor, AVR pressure regulation output, make the voltage of all operating diesel engine generators, frequency consistent with electrical network bus, when unit bus phase place is consistent with electrical network bus phase place, namely when first phase detection module phase difference output is the corresponding signal of zero, control signal is sent to the Executive Module (pb) containing electrical network bus circuit breaker by numbering minimum controller in operation, make the closing of contact of electrical network bus circuit breaker, realize anti-grid-connected; Send anti-grid-connected signal to local communication bus, receive the anti-grid-connected signal that in local communication bus, other controllers send simultaneously;
16) the ASR speed governing output of processor sends speed-regulating signal, the power output of operating diesel engine generator is made to be zero, sending signal to its Executive Module again makes the contact of its unit bus circuit breaker disconnect, and send diesel engine generator off-the-line status signal to local communication bus, receive the off-the-line status signal that in local communication bus, other controllers send;
17) off-the-line completes, and unit returns to initial condition.
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|---|---|---|---|
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107453478A (en) * | 2017-07-10 | 2017-12-08 | 广东电网有限责任公司佛山供电局 | A kind of generator self-starting determination methods and device |
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| CN109921468A (en) * | 2019-04-12 | 2019-06-21 | 福建省广通电控有限公司 | A kind of small-sized single-phase generating set parallel connection control method |
| CN110011353A (en) * | 2019-03-19 | 2019-07-12 | 上海唐银投资发展有限公司 | A kind of parallel operation control system and method for diesel-driven generator power supply-distribution system |
| CN110112771A (en) * | 2019-04-16 | 2019-08-09 | 中广核研究院有限公司 | The method and device of nuclear power plant's generator excitation unit detection operation state of generator |
| CN110649653A (en) * | 2019-09-23 | 2020-01-03 | 宝鸡石油机械有限责任公司 | Automatic start-stop and grid-connected system of generator set |
| CN111404207A (en) * | 2020-03-24 | 2020-07-10 | 国电联合动力技术有限公司 | Power distribution network access control method and control system for generator set |
| CN111509837A (en) * | 2020-04-28 | 2020-08-07 | 合肥康尔信电力系统有限公司 | Diesel generating set parallel output double-bus main-standby power supply control technology |
| CN111509786A (en) * | 2020-04-29 | 2020-08-07 | 合肥康尔信电力系统有限公司 | Parallel operation and parallel operation control system of diesel generating set |
| CN112290587A (en) * | 2020-10-12 | 2021-01-29 | 辽宁红沿河核电有限公司 | Operation control method and speed regulation controller of diesel generator set |
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| CN113866636A (en) * | 2021-12-03 | 2021-12-31 | 深圳市聚能优电科技有限公司 | Firewood storage equipment and parallel operation testing method thereof |
| CN117375093A (en) * | 2022-06-30 | 2024-01-09 | 南京南瑞继保电气有限公司 | Automatic parallel operation control method and system for diesel generating set and electronic equipment |
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| CN105858349B (en) * | 2016-05-17 | 2019-03-15 | 广东溢达纺织有限公司 | Bobbin-winding machine spindle position efficiency measuring equipment and method |
| CN105858349A (en) * | 2016-05-17 | 2016-08-17 | 广东溢达纺织有限公司 | Spindle position efficiency metering device and method of winding machine |
| CN105978028A (en) * | 2016-06-23 | 2016-09-28 | 太原理工大学 | Diesel generator parallel control system |
| WO2018137404A1 (en) * | 2017-01-24 | 2018-08-02 | 华南理工大学 | Control method suitable for autonomous grid connection coordination of diesel generator group |
| CN106992543A (en) * | 2017-04-27 | 2017-07-28 | 太原理工大学 | The independent micro-capacitance sensor that diesel-driven generator and batteries are constituted |
| CN106992543B (en) * | 2017-04-27 | 2019-04-12 | 太原理工大学 | The independent micro-capacitance sensor that diesel-driven generator and battery group are constituted |
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| CN109921468B (en) * | 2019-04-12 | 2023-08-18 | 福建广通机电科技有限公司 | Parallel operation control method for small single-phase generator set |
| CN110112771A (en) * | 2019-04-16 | 2019-08-09 | 中广核研究院有限公司 | The method and device of nuclear power plant's generator excitation unit detection operation state of generator |
| CN110649653A (en) * | 2019-09-23 | 2020-01-03 | 宝鸡石油机械有限责任公司 | Automatic start-stop and grid-connected system of generator set |
| CN111404207A (en) * | 2020-03-24 | 2020-07-10 | 国电联合动力技术有限公司 | Power distribution network access control method and control system for generator set |
| CN111509837A (en) * | 2020-04-28 | 2020-08-07 | 合肥康尔信电力系统有限公司 | Diesel generating set parallel output double-bus main-standby power supply control technology |
| CN111509786B (en) * | 2020-04-29 | 2021-08-17 | 合肥康尔信电力系统有限公司 | Parallel operation and parallel operation control system of diesel generating set |
| CN111509786A (en) * | 2020-04-29 | 2020-08-07 | 合肥康尔信电力系统有限公司 | Parallel operation and parallel operation control system of diesel generating set |
| CN112290587A (en) * | 2020-10-12 | 2021-01-29 | 辽宁红沿河核电有限公司 | Operation control method and speed regulation controller of diesel generator set |
| CN112290587B (en) * | 2020-10-12 | 2022-08-12 | 辽宁红沿河核电有限公司 | Operation control method and speed regulation controller of diesel generator set |
| CN112803482A (en) * | 2021-02-25 | 2021-05-14 | 中国五环工程有限公司 | Automatic start-stop and load control system and control method for diesel generating set |
| CN113866636A (en) * | 2021-12-03 | 2021-12-31 | 深圳市聚能优电科技有限公司 | Firewood storage equipment and parallel operation testing method thereof |
| CN113866636B (en) * | 2021-12-03 | 2022-03-11 | 深圳市聚能优电科技有限公司 | Parallel operation testing method for diesel storage equipment |
| CN117375093A (en) * | 2022-06-30 | 2024-01-09 | 南京南瑞继保电气有限公司 | Automatic parallel operation control method and system for diesel generating set and electronic equipment |
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