CN106849160B - A kind of suitable diesel-driven generator group independently coordinates grid-connected control method - Google Patents
A kind of suitable diesel-driven generator group independently coordinates grid-connected control method Download PDFInfo
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- CN106849160B CN106849160B CN201710059425.3A CN201710059425A CN106849160B CN 106849160 B CN106849160 B CN 106849160B CN 201710059425 A CN201710059425 A CN 201710059425A CN 106849160 B CN106849160 B CN 106849160B
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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Abstract
The invention discloses a kind of suitable diesel-driven generator groups independently to coordinate grid-connected control method, the method is using CAN bus by the grid-connected diesel generating set connection in need of institute in region, form CAN network, the priority configuration of network node is completed by the uniqueness of diesel-driven generator CAN node address, each network node is according to the grid-connected working condition of oneself and the grid-connected working condition of other diesel-driven generators, according to the grid-connected license of preset prioritized contention, the low network node of priority automatically exits from, the network node of highest priority obtains grid-connected power, after the diesel-driven generator for obtaining grid-connected power completes grid-connected, also grid-connected license is applied for again and competed to not grid-connected diesel-driven generator, until the grid-connected success of all-network node.This method does not need special main net-connected controller in practical applications to coordinate each diesel-driven generator node, and each node can reduce cost from primal coordination, improves simultaneously net spee.
Description
Technical field
The present invention relates to generator connecting in parallel with system control fields, and in particular to a kind of suitable diesel-driven generator group is independently coordinated simultaneously
The control method of net.
Background technique
In key areas such as hospital, communication, fire-fightings, it is often necessary to using diesel generating set as standby emergency power supply.
In the practical application of diesel generating set, with the variation of load, electric power thus supplied will also match with load, then power supply system
The diesel-driven generator output power and number of units that system puts into operation can also change, meanwhile, diesel-driven generator may break down,
It needs to start spare diesel-driven generator at this time, and is incorporated into power grid.Therefore, because diesel generating set dilatation or spare
Demand, diesel generating set needs to carry out cutting-in control in practical applications.When a panel region needs more diesel-driven generators
When grid-connected, in order to reduce the impact to power grid and guarantee the stability of electric system, need one by one diesel-driven generator
It is successively connected to the grid, more diesel-driven generators can not be grid-connected simultaneously.Then, a kind of grid-connected coordination method is needed, each bavin is coordinated
Fry dried food ingredients motor is successively grid-connected.Currently, working as diesel-driven generator negligible amounts, the grid-connected method of diesel engine is manually controlled compared with mostly using,
Manually will one by one diesel-driven generator it is grid-connected, this mode clearly not applys to the big quantity diesel-driven generator being distributed on a large scale
Group.
Therefore, it is necessary to a kind of control coordination strategies, allow all diesel engine nodes in region grid-connected from primal coordination,
One then one be connected to the grid, to be automatically composed large capacity power grid.
Summary of the invention
It is autonomous the purpose of the present invention is in view of the above shortcomings of the prior art, providing a kind of suitable diesel-driven generator group
Coordinate grid-connected control method, this method does not need special main net-connected controller in practical applications to coordinate each diesel oil hair
Motor node, each node can reduce cost from primal coordination, improve simultaneously net spee.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of suitable diesel-driven generator group independently coordinates grid-connected control method, and the method is specific as follows:
1) institute's grid-connected diesel generating set in need in region is connected using CAN bus, composition CAN network, each
Diesel generating set constitutes a network node, and the grid connection state table that can accommodate all-network node is arranged, described
Grid connection state table includes the grid connection state of each network node, has two column datas, and the first column data is " communication house dog timing
Device ", the second column data are status data, status data is " not connected ", " not grid-connected ", " apply grid-connected ", " applying successfully ",
One of " in grid-connected ", " grid-connected success " or " grid-connected failure ", the offset address in table are the node in CAN network
Location；
2) data communication format of CAN network uses SAE J1939 agreement in step 1), and on the basis of the consensus standard
Increase parameter group # PGN, it is all to only use a PGN to grid-connected relevant CAN frame, make the priority of CAN frame only and node
Address is related, is configured by the priority that the uniqueness of diesel-driven generator CAN node address completes network node, the number of CAN frame
A byte is used according to domain, directly using the state byte data in grid connection state table；
3) each diesel-driven generator network node exchanges respective grid connection state information, each network section by CAN network
Point is according to the grid-connected working condition of oneself and the grid-connected working condition of other diesel-driven generators, simultaneously according to preset prioritized contention
Net license, the low network node of priority automatically exit from, and the network node of highest priority obtains grid-connected power, when the grid-connected power of acquisition
Diesel-driven generator complete it is grid-connected after, also grid-connected license is applied for again and competed to not grid-connected diesel-driven generator, until all nets
The grid-connected success of network node.
Preferably, the diesel-driven generator network node grid-connected coordination control algolithm of the step 3) is specific as follows:
Step1, diesel-driven generator power-up initializing, the status modifier by all-network node in " grid connection state table " are
" not connected ", " communication Watch Dog Timer " are initialized as 10, and unit is 100 milliseconds, and numerical value 10 is equivalent to 1 second；
Step2, the new node for accessing CAN network receive CAN frame constantly to update " grid connection state table ", and to CAN network
One this node state data frame of every 100 milliseconds of transmissions, it is grid-connected to apply further according to the grid connection state of each node after waiting 1 second,
When other nodes are all not on the working condition of " applying successfully " or " in grid-connected ", and without more in " grid connection state table "
When priority node is in " application is grid-connected ", i.e., publication " application is grid-connected " into network, when this node inspection " grid connection state
When having the node lower than this node priority " application is grid-connected " in table ", while starting grid-connected timer, starts grid-connected timer and make
For the beginning for entirely applying for the grid-connected period；
Step3 forbids the application of this node grid-connected, if then having higher first when the grid-connected timer of node is to 200 milliseconds
The node application of priority is grid-connected, then automatically exits from application, returns to " not grid-connected ", and grid-connected timer is reset, and stops timing, if
There is no the node application of higher priority grid-connected, then waiting timer detects the presence of the section of higher priority to 400 milliseconds again
Point application is grid-connected, if so, then returning to " not grid-connected " state, empties and stop timer, if nothing, modifying this node state is
" applying successfully " continues waiting for timer to 500 milliseconds, and updating this node state is " in grid-connected ", finally empties and closes simultaneously
Net timer；
Step4, in " in grid-connected " node start it is grid-connected, if grid-connected success, to CAN network issue " grid-connected success "
State sends " grid-connected failure ", state, and alarm and carry out manual maintenance if not succeeding, and waits and fixes and then secondary entrance
It is grid-connected to enter " not grid-connected " state continuation application in 1 second after powering on for beginning state.
Preferably, in step 1), the node address of the CAN network is 8, node data in " grid connection state table " and
State is arranged according to node address size order.
Preferably, the CAN network node in step 3) updates " grid connection state table ", CAN network section using interrupt processing
, send a local status data frame, when local node receives certain node CAN frame, " communication house dog meter at every 100 milliseconds of point
When device " be set as 10 again, the every 100 milliseconds of handles of local node " communication Watch Dog Timer " subtract 1, when " communication Watch Dog Timer "
After being zero, corresponding node state is changed to " be not connected with ", judges that long-term not sent data frame node is in " not connected " with this
State.
Preferably, the diesel-driven generator network node includes cutting-in control module, electric network information acquisition module, grid-connected holds
Row module and CAN bus transceiver module, the cutting-in control module uses STM32F407VET6 single-chip microcontroller, to entire diesel oil
Generating set group is controlled from the grid-connected process of primal coordination, and the electric network information acquisition module is used to acquire power grid and diesel oil
The voltage of generator alternating current electricity, phase difference, frequency and diesel-driven generator alternating current current information, the grid-connected execution module uses
In executing and net operation, control A.C. contactors by two relays, the switches of two relays by cutting-in control module into
Row control, after the grid-connected actuating of relay, A.C. contactor control terminal is connected, and A.C. contactor closure, progress is grid-connected, works as off-the-line
After the actuating of relay, A.C. contactor control terminal is disconnected, and A.C. contactor disconnects, and carries out off-the-line operation, the CAN bus transmitting-receiving
Module is used to send and receive the status information in each network node " grid connection state table ".
Preferably, the electric network information acquisition module include alternating voltage ratio reduce module, two comparator modules,
MCU timer module, MCU ADC module and Hall sensor module.
Preferably, the MCU timer module is mainly made of three timers: the input signal of timer 1 is transformation
Network voltage square-wave signal afterwards, the frequency of grid ac voltage is calculated with this；The input signal of timer 2 is transformed hair
Electric moter voltage square-wave signal calculates the frequency of generator alternating current voltage with this；Timer 3 uses two channels, and input signal is
Above-mentioned two-way square-wave signal, the difference for the zero-crossing timing that MCU obtains this two paths of signals by timer calculates power grid and generator is handed over
Galvanic electricity voltage phase difference.
Preferably, the CAN bus transceiver module is by piece CAN controller in MCU and external CAN bus transceiver group
At external CAN bus transceiver mainly uses TJA1040.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1, it is grid-connected not need special master to diesel-driven generator group of the invention by determining the grid-connected moment from primal coordination
Controller is coordinated, and reduces manual intervention and grid-connected time, improves and net spee.
2, method of the invention keeps diesel-driven generator grid-connected one by one, and synchronization only has a diesel generation
During machine is in grid-connected, the impact to power grid is reduced, the reliability of power grid and the stability of electric system are improved.
3, using grid-connected algorithm of the invention, it can add at any time, reduce diesel-driven generator node, not need to carry out software
With the modification of hardware, and the information and grid connection state that there are each node other nodes whether to connect CAN network, favorably
In Fault Isolation and diagnosis, be conducive to the maintenance of diesel generating set and the extension of subsequent other function.
Detailed description of the invention
Fig. 1 is the CAN network structure chart of the multiple diesel-driven generator compositions of the embodiment of the present invention.
Fig. 2 is the structural block diagram of diesel-driven generator of embodiment of the present invention network node.
Fig. 3 (a) is the structure chart of the grid-connected execution module of the embodiment of the present invention, and Fig. 3 (b) is electric network information of the embodiment of the present invention
The structure chart of acquisition module.
Fig. 4 is the grid-connected process data flow graph of CAN network of the multiple diesel-driven generator compositions of the embodiment of the present invention.
Fig. 5 is diesel-driven generator of embodiment of the present invention network node grid-connected coordination control algolithm flow chart.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment:
It present embodiments provides a kind of suitable diesel-driven generator group and independently coordinates grid-connected control method, the method tool
Body is as follows:
1) institute's grid-connected diesel generating set in need in region is connected using CAN bus, composition CAN network, such as Fig. 1
Shown, each diesel generating set constitutes a network node, and be arranged one it is can accommodating all-network node and netted
State table, the grid connection state table include the grid connection state of each network node, have two column datas, and the first column data is " communication
Watch Dog Timer ", " communication Watch Dog Timer " record other node communication time interval states, initial value 10, every
100 milliseconds, " communication Watch Dog Timer " subtracts 1, often receives the communications data frame that a node is sent, " communication house dog
Timer " is reconfigured for 10, and when all not receiving certain node communication data in 1 second, " communication Watch Dog Timer " will become
It is 0, then the vertex ticks is " not connected " state, indicates it because breaking down or the reasons such as manual operation are from CAN bus
It disconnects, sends data to every 100 millisecond period of CAN bus node, 110 node address design of CAN bus in the present embodiment
For 0x01~0x6E, 7 status datas are indicated as shown in table 1, and the second column data is status data, and status data is " not connect
Connect ", " not grid-connected ", " application grid-connected ", " applying successfully ", " in grid-connected ", one of " grid-connected success " or " grid-connected failure ", table
In offset address be node address in CAN network；
| Byte data | Grid connection state | Byte data | Grid connection state |
| 0x00 | It is not connected | 0x11 | In grid-connected |
| 0x01 | It is not grid-connected | 0x0F | Grid-connected success |
| 0x02 | Apply grid-connected | 0xF0 | Grid-connected failure |
| 0x10 | Apply successfully |
Table 1
2) data communication format of CAN network is referring to SAE J1939 agreement in step 1), using the extension of 29 bit identifiers
Frame, identifier specifically distribute as shown in table 2, wherein P is priority bit, is only used for optimizing message delay in the bus, receiver
Acceptance fitration it must be shielded, herein use 111, the present embodiment and in Network Communication, it is all to it is grid-connected relevant
CAN frame uses the same PGN, keeps the priority of CAN frame only related with node address, in the present embodiment, designing grid-connected PGN is
62013 (0xF23D) are configured, CAN frame by the priority that the uniqueness of diesel-driven generator CAN node address completes network node
Data field use a byte, directly use grid connection state table in state byte data；
| P (priority) | R (reservation) | DP (data page) | PF (PDU format) | PS (specific PDU) | SA (source address) |
| ID28~ID26 | ID25 | ID24 | ID23~ID16 | ID15~ID8 | ID7~ID0 |
| 111b | 0b | 0b | 0xF2 | 0x3D | 0x01~0x6E |
Table 2
3) each diesel-driven generator network node exchanges respective grid connection state information, each network section by CAN network
Point is according to the grid-connected working condition of oneself and the grid-connected working condition of other diesel-driven generators, simultaneously according to preset prioritized contention
Net license, the low network node of priority automatically exit from, and the network node of highest priority obtains grid-connected power, when the grid-connected power of acquisition
Diesel-driven generator complete it is grid-connected after, also grid-connected license is applied for again and competed to not grid-connected diesel-driven generator, until all nets
The grid-connected success of network node.
Wherein, the diesel-driven generator network node grid-connected coordination control algolithm of the step 3) is specific as follows:
Step1, diesel-driven generator power-up initializing, the status modifier by all-network node in " grid connection state table " are
" not connected ", " communication Watch Dog Timer " are initialized as 10, and unit is 100 milliseconds, and numerical value 10 is equivalent to 1 second；
Step2, the new node for accessing CAN network receive CAN frame constantly to update " grid connection state table ", and to CAN network
One this node state data frame of every 100 milliseconds of transmissions, it is grid-connected to apply further according to the grid connection state of each node after waiting 1 second,
When other nodes are all not on the working condition of " applying successfully " or " in grid-connected ", and without more in " grid connection state table "
When priority node is in " application is grid-connected ", i.e., publication " application is grid-connected " into network, when this node inspection " grid connection state
When having the node lower than this node priority " application is grid-connected " in table ", while starting grid-connected timer, starts grid-connected timer and make
For the beginning for entirely applying for the grid-connected period；
Step3 forbids the application of this node grid-connected, if then having higher first when the grid-connected timer of node is to 200 milliseconds
The node application of priority is grid-connected, then automatically exits from application, returns to " not grid-connected ", and grid-connected timer is reset, and stops timing, if
There is no the node application of higher priority grid-connected, then waiting timer detects the presence of the section of higher priority to 400 milliseconds again
Point application is grid-connected, if so, then returning to " not grid-connected " state, empties and stop timer, if nothing, modifying this node state is
" applying successfully " continues waiting for timer to 500 milliseconds, and updating this node state is " in grid-connected ", finally empties and closes simultaneously
Net timer；
Step4, in " in grid-connected " node start it is grid-connected, if grid-connected success, to CAN network issue " grid-connected success "
State sends " grid-connected failure ", state, and alarm and carry out manual maintenance if not succeeding, and waits and fixes and then secondary entrance
It is grid-connected to enter " not grid-connected " state continuation application in 1 second after powering on for beginning state.
Wherein, in step 1), the node address of the CAN network is 8, node data and shape in " grid connection state table "
State is arranged according to node address size order；
Wherein, the CAN network node in step 3) updates " grid connection state table ", CAN network node using interrupt processing
Every 100 milliseconds, send a local status data frame, when local node receives certain node CAN frame, " communication house dog timing
Device " is set as 10 again, and the every 100 milliseconds of handles of local node " communication Watch Dog Timer " subtract 1, when " communication Watch Dog Timer " is
After zero, corresponding node state is changed to " be not connected with ", judges that long-term not sent data frame node is in " not connected " shape with this
State.
Wherein, the diesel-driven generator network node include cutting-in control module M201, electric network information acquisition module M203,
Grid-connected execution module M202 and CAN bus transceiver module M204, as shown in Fig. 2, the cutting-in control module M201 uses ST
The STM32F407VET6 single-chip microcontroller (MCU) of company, kernel ARMCortex-M4, built-in single precision FPU (floating-point operation list
Member) and the higher analog peripheral of precision, the low-power consumption with efficient signal handling capacity and Cortex-M processor family
And low cost, to being controlled from the grid-connected process of primal coordination for entire diesel-driven generator group, the electric network information acquisition module
M203 be used to acquire the voltage of power grid and diesel-driven generator alternating current, phase difference, frequency and diesel-driven generator alternating current electricity
Stream information is used for grid-connected process control, and shown in principle such as Fig. 3 (b), main modular has alternating voltage ratio to reduce module
M304, two comparator module M305 and M307, MCU timer module M306, MCU ADC module M308, Hall sensor mould
Block M309, alternating voltage ratio reduces module M304 will be handed over using the preferable precision resistance of consistency and precision operational-amplifier
The phase voltage signal of galvanic electricity obtains exchange 380V and becomes maximum the suitable connection MCU that value is less than 3V according to 1/408 scale smaller
It is internally integrated the voltage signal of ADC；Amplifier input resistance uses the resistance of 6 680k Ω to connect to improve pressure resistance and meet state
The security regulations of family's standard.Operational amplifier can choose the OPA4188 of TI company, with low noise, rail-to-rail, zero shift
The advantages that.Meanwhile the power grid and generator alternating current voltage signal of scale smaller pass through respectively two comparator module M305 and
M307 module obtains voltage square wave signal, is input in MCU timer module M306.MCU timer module M306 is mainly by three
A timer composition: the input signal of timer 1 is transformed network voltage square-wave signal, calculates grid ac voltage with this
Frequency；The input signal of timer 2 is transformed generator voltage square-wave signal, calculates generator alternating current voltage with this
Frequency；Timer 3 uses two channels, and input signal is above-mentioned two-way square-wave signal, and MCU, which obtains this two-way by timer, to be believed
Number zero-crossing timing difference to calculating power grid and generator alternating current piezoelectric voltage phase difference.The three-phase alternating current electric current of generator is surveyed
Amount uses Hall sensor module M309, obtains the ac voltage signal converted for MCU ADC module M308, thus
To electric current real-time measurement values.The grid-connected execution module M202 is mainly used for controlling grid-connected switch, one design example knot
Shown in structure such as Fig. 3 (a), main modular has: A.C. contactor M301, simultaneously network relay M302, off-the-line relay M303, MCU are logical
It crosses two common I/O ports and controls simultaneously network relay M303 and off-the-line relay M302 respectively by transistor amplifier, wherein
And network relay M303 use its normally opened contact, off-the-line relay M302 use normally-closed contact, cutting-in control module M201 according to
The voltage and frequency and phase of power grid and diesel engine that electric network information acquisition module M203 is obtained, if first diesel generation
Machine is grid-connected, then network voltage is zero, as long as diesel engine voltage and frequency are adjusted to national standard at this time the range being set to (such as
380V and 50Hz), it realizes in time grid-connected；If not first grid-connected diesel engine, then by adjusting diesel engine excitation handle
Output voltage is adjusted to network voltage, then adjusts diesel engine output voltage frequency by adjusting diesel engine speed, and keeps electricity
The phase of net voltage and diesel engine output voltage can be realized grid-connected in the range of national Specification.It is grid-connected in order to shorten
Adjusting diesel oil unit frequency first can be made it below mains frequency, so that diesel oil unit frequency is chased after rigid electric voltage frequency, at this time by the time
If frequency and phase are all within the scope of national regulation, at once grid-connected.It is grid-connected when the I/O port of MCU exports cutting-in control order
Relay M303 movement, A.C. contactor M301 control terminal is connected at this time, and A.C. contactor M301 movement is closed the switch, realized
It is grid-connected.When needing generator from grid disconnection, I/O port exports off-the-line order, off-the-line relay M302 movement, normally closed switch
It disconnects, A.C. contactor M301 control terminal disconnects, and switch disconnects, and realizes off-the-line.The CAN bus transceiver module for receive and
The status information in each network node " grid connection state table " is sent, is received and dispatched by piece CAN controller in MCU and external CAN bus
Device composition, external CAN bus transceiver mainly use TJA1040.
Fig. 4 is the grid-connected process data flow graph of CAN network of the present embodiment, and main comprising modules have: CAN receiving processing module
M401, CAN send processing module M402, grid connection state table M403, cutting-in control Coordination module M404, grid-connected process control module
M405.CAN bus receiving processing module M401 is mainly the grid connection state for receiving other node periodicity sendings, to update this
" grid connection state table " M403 of ground node, meanwhile, when receiving " application the is grid-connected " state of priority lower than this node, if simultaneously
Net timer does not start, then starts grid-connected timer.CAN send processing module M402 every 100 milliseconds by local node simultaneously
Net state is sent in network, when transmission be local node " application grid-connected " state when, if grid-connected timer does not start,
Start grid-connected timer." grid connection state table " M403 is made of two column datas, and the 1st column data is " communication Watch Dog Timer ",
2nd column data is status data, and status data is " not connected ", " not grid-connected ", " apply grid-connected ", " applying successfully ", " grid-connected
In ", " grid-connected success ", one of " grid-connected failure ", the node state in table in each element representation CAN network, offset address is
For the node address in CAN network." communication Watch Dog Timer " mainly records the communications status of other nodes, and initial value is
10, every 100 milliseconds, " the communication Watch Dog Timer " of other nodes subtracts 1 in table, every communication data for receiving a node
Frame, then " the communication Watch Dog Timer " of the node is reset to 10, then when the communication for being all not received by some node in 1 second
When data, then " the communication Watch Dog Timer " of the node will become 0, and marking the state of the node at this time is " not connected ", table
Show that it is disconnected because of failure or manual operation from CAN bus.In grid connection state data, the grid connection state of other nodes
Data are updated using the received status data of CAN receiving processing module M401, and local node grid connection state data are then sharp
Judge which kind of state this node is in be updated with grid-connected coordination module M404.M404 is according to " simultaneously for grid-connected coordination module
Net state table " obtains this node and the grid connection state of other nodes, judges whether local node achieves grid-connected priority,
Simultaneously net operation whether is carried out, and updates the grid connection state of this node in local node " grid connection state table ".When this node obtains
Grid-connected temporary the status modifier of this node is " in grid-connected " by grid-connected coordination module M404, and to grid-connected process control module
M405 sends grid-connected order.After grid-connected process control module M405 receives grid-connected order, beginning is grid-connected, is adopted using electric network information
Collect data and grid-connected process control operation is executed by relevant grid-connected algorithm.
The present embodiment diesel-driven generator network node grid-connected coordination control algolithm flow chart is as shown in Figure 5: system carries out
Electricity, which initializes, simultaneously enters " not connected " S501 state, and initializing content includes: (1) by the shape of all nodes in " grid connection state table "
State is revised as " being not connected with ", and " communication Watch Dog Timer " is initialized as 10；(2) initialization of CAN controller；(3) 100 millis
The initialization of second, 1 second system beat timer, grid-connected timer and other timers.In " not connected " state, wait 1 second
Enter " not grid-connected " S502 state afterwards, this node learns the newest grid connection state of other nodes and be according to " grid connection state table "
The state of no connection CAN bus, is then revised as " not grid-connected " for this node state.Node in " not grid-connected " state only has
Node allow to apply grid-connected and node need in grid-connected and " grid connection state table " there is no " applying successfully ", " in grid-connected " with
And priority just can enter S503 " application is grid-connected " state, other feelings when being higher than the grid connection states such as " application grid-connected " of this node
Condition node is in S502 " not connected " state.At the time of each node allows to apply for grid-connected are as follows: from " grid connection state table " not
In the presence of " application grid-connected ", " applying successfully ", " in grid-connected " state start to " grid-connected timer " forbid applying it is grid-connected until, " simultaneously
Beginning of the starting of net timer " as a grid-connected period, " the grid-connected timer " of all nodes almost start simultaneously, work as meter
When to 200 milliseconds when, forbid applying grid-connected, do not apply for that grid-connected node needs to wait next grid-connected period at this time, applied
Highest priority finally obtains grid-connected license in grid-connected node.Grid-connected timer starts in both cases: (1) grid-connected timing
This node has sent " application is grid-connected " state when device is also inactive；(2) grid-connected timer is also inactive excellent but receive other
Beginning of the first grade lower than " application grid-connected " state that local node is sent, when grid-connected timer initiation as a grid-connected period.
When S503 state, wait " grid-connected timer " timing to 200 milliseconds, all nodes forbid applying grid-connected, inquiry " grid connection state
It is higher than the grid connection states such as " application is grid-connected " of this node in table " with the presence or absence of " applying successfully ", " in grid-connected " and priority, if
It is grid-connected that application is exited in the presence of, this node, returns to state S502；If it does not exist, this node is temporarily in " application is grid-connected " this moment
Highest priority, since timer starts having time error, in bus may there are also " application are grid-connected " of higher priority also not
Transmission, it is therefore desirable to wait " grid-connected timer " to 400 milliseconds, again inquire " grid connection state table " in the presence or absence of " application at
Function ", " in grid-connected " and priority are higher than grid connection states such as " application are grid-connected " of this node, this moment, and if it exists, then this node moves back
Apply out grid-connected, return to state S502, if it does not exist, then this node obtains the grid-connected priority in this grid-connected period, and application is simultaneously
It nets successfully, " applies for successfully " state into S504.When into S504 " apply for successfully " state after, waiting timer to 500 milliseconds,
It is directly entered S505 " in grid-connected " state.In S505 state, the node into " in grid-connected " state starts and net operation, if grid-connected
Success then enters S507 " grid-connected success " state, if grid-connected failure, enters S506 " grid-connected failure " state." simultaneously in S506
Then the node of net failure " state is powered on and initialized by entering beginning state after alarm and manual maintenance." simultaneously in S507
Net successfully " if node generator off-the-line off-network, S502 " not grid-connected " state is returned to, if generator failure off-network, alarms
And enter beginning state after manual maintenance, then it is powered on and initialized.
The above, only the invention patent preferred embodiment, but the scope of protection of the patent of the present invention is not limited to
This, anyone skilled in the art is in the range disclosed in the invention patent, according to the present invention the skill of patent
Art scheme and its patent of invention design are subject to equivalent substitution or change, belong to the scope of protection of the patent of the present invention.
Claims (8)
1. a kind of suitable diesel-driven generator group independently coordinates grid-connected control method, which is characterized in that the method is specifically such as
Under:
1) institute's grid-connected diesel generating set in need in region is connected using CAN bus, composition CAN network, each diesel oil
Generating set constitutes a network node, and the grid connection state table that can accommodate all-network node is arranged, described grid-connected
State table includes the grid connection state of each network node, has two column datas, and the first column data is " communication Watch Dog Timer ",
Second column data is status data, and status data is " not connected ", " not grid-connected ", " apply grid-connected ", " applying successfully ", " grid-connected
In ", one of " grid-connected success " or " grid-connected failure ", the offset address in grid connection state table is the node in CAN network
Address；
2) data communication format of CAN network uses SAE J1939 agreement in step 1), and increases on the basis of the consensus standard
Parameter group # PGN, it is all to only use a PGN to grid-connected relevant CAN frame, make the priority of CAN frame only and node address
It is related, it is configured by the priority that the uniqueness of diesel-driven generator CAN node address completes network node, the data field of CAN frame
Using a byte, directly using the state byte data in grid connection state table；
3) each diesel-driven generator network node exchanges respective grid connection state information, each network node root by CAN network
According to oneself grid-connected working condition and other diesel-driven generators grid-connected working condition, according to preset prioritized contention it is grid-connected permitted
Can, the low network node of priority automatically exits from, and the network node of highest priority obtains grid-connected power, when the bavin for obtaining grid-connected power
After the completion of fry dried food ingredients motor is grid-connected, also grid-connected license is applied for again and competed to not grid-connected diesel-driven generator, until all-network section
The grid-connected success of point.
2. a kind of suitable diesel-driven generator group according to claim 1 independently coordinates grid-connected control method, feature
Be: the diesel-driven generator network node grid-connected coordination control algolithm of the step 3) is specific as follows:
The status modifier of all-network node in " grid connection state table " is " not connect by Step1, diesel-driven generator power-up initializing
Connect ", " communication Watch Dog Timer " is initialized as 10, and unit is 100 milliseconds, and numerical value 10 is equivalent to 1 second；
Step2, the new node for accessing CAN network receive CAN frame constantly to update " grid connection state table ", and to CAN network every 100
Millisecond sends this node state data frame, grid-connected to apply further according to the grid connection state of each node after waiting 1 second, when other
Node is all not on the working condition of " applying successfully " or " in grid-connected ", and without more Gao Youxian in " grid connection state table "
When grade node is in " application is grid-connected ", i.e., publication " application is grid-connected ", has when in the inspection of this node " grid connection state table " into network
When the node lower than this node priority " application is grid-connected ", while starting grid-connected timer, starts grid-connected timer as entire
Apply for the beginning in grid-connected period；
Step3 forbids the application of this node grid-connected, if then there is more Gao Youxian first when the grid-connected timer of node is to 200 milliseconds
The node application of grade is grid-connected, then automatically exits from application, return to " not grid-connected ", and grid-connected timer is reset, and stops timing, if not having
The node application of higher priority is grid-connected, then waiting timer detects the presence of the node Shen of higher priority to 400 milliseconds again
Please be grid-connected, if so, then returning to " not grid-connected " state, timer is emptied and stops, if nothing, modifying this node state is " application
Success ", continues waiting for timer to 500 milliseconds, and updating this node state is " in grid-connected ", finally empties and closes grid-connected timing
Device；
Step4, in " in grid-connected " node start it is grid-connected, if grid-connected success, to CAN network issue " grid-connected success " shape
State sends " grid-connected failure ", state, and alarm and carry out manual maintenance if not succeeding, wait fix and then it is secondary enter open
It is grid-connected to enter " not grid-connected " state continuation application in 1 second after powering on for beginning state.
3. a kind of suitable diesel-driven generator group according to claim 1 independently coordinates grid-connected control method, feature
Be: in step 1), the node address of the CAN network is 8, and the node data and state in " grid connection state table " are according to section
The arrangement of dot address size order.
4. a kind of suitable diesel-driven generator group according to claim 2 independently coordinates grid-connected control method, feature
Be: the CAN network node in step 3) is updated " grid connection state table " using interrupt processing, every 100 milli of CAN network node
Second, send a local status data frame, when local node receives certain node CAN frame, " communication Watch Dog Timer " again
10 are set as, the every 100 milliseconds of handles of local node " communication Watch Dog Timer " subtract 1, after " communication Watch Dog Timer " is zero,
Corresponding node state is changed to " be not connected with ", judges that long-term not sent data frame node is in " not connected " state with this.
5. a kind of suitable diesel-driven generator group according to claim 1 independently coordinates grid-connected control method, feature
Be: the diesel-driven generator network node include cutting-in control module, electric network information acquisition module, grid-connected execution module and
CAN bus transceiver module, the cutting-in control module uses STM32F407VET6 single-chip microcontroller, to entire diesel-driven generator group
Controlled from the grid-connected process of primal coordination, the electric network information acquisition module be used to acquire power grid and diesel-driven generator exchange
Electricity voltage, phase difference, frequency and diesel-driven generator alternating current current information, the grid-connected execution module for execute it is grid-connected
Operation controls A.C. contactor by two relays, and the switch of two relays is controlled by cutting-in control module, when simultaneously
After network relay movement, A.C. contactor control terminal is connected, and A.C. contactor closure, progress is grid-connected, when the off-the-line actuating of relay
Afterwards, A.C. contactor control terminal disconnects, and A.C. contactor disconnects, and carries out off-the-line operation, the CAN bus transceiver module is for connecing
Receive and send the status information in each network node " grid connection state table ".
6. a kind of suitable diesel-driven generator group according to claim 5 independently coordinates grid-connected control method, feature
Be: the electric network information acquisition module includes that alternating voltage ratio reduces module, two comparator modules, MCU timer mould
Block, MCU ADC module and Hall sensor module.
7. a kind of suitable diesel-driven generator group according to claim 6 independently coordinates grid-connected control method, feature
Be: the MCU timer module is made of three timers: the input signal of timer 1 is transformed network voltage side
Wave signal calculates the frequency of grid ac voltage with this；The input signal of timer 2 is transformed generator voltage square wave letter
Number, the frequency of generator alternating current voltage is calculated with this；Timer 3 uses two channels, and input signal is above-mentioned two-way square wave letter
Number, the difference for the zero-crossing timing that MCU obtains this two paths of signals by timer calculates power grid and generator alternating current piezoelectric voltage phase difference.
8. a kind of suitable diesel-driven generator group according to claim 5 independently coordinates grid-connected control method, feature
Be: the CAN bus transceiver module is made of on piece CAN controller in MCU and external CAN bus transceiver, described external
CAN bus transceiver uses TJA1040.
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| PCT/CN2017/113889 WO2018137404A1 (en) | 2017-01-24 | 2017-11-30 | Control method suitable for autonomous grid connection coordination of diesel generator group |
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| CN107425550A (en) * | 2017-09-12 | 2017-12-01 | 上海科泰电源股份有限公司 | A kind of data center's diesel-driven generator isolated island power station dual-ring network distribution system |
| CN111525623B (en) * | 2020-04-29 | 2021-11-02 | 合肥康尔信电力系统有限公司 | Diesel generating set parallel output double-bus simultaneous on-line mutual standby power supply control system |
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| CN105071432B (en) * | 2015-07-31 | 2017-07-21 | 太原理工大学 | Diesel-driven generator parallel control device |
| CN205092586U (en) * | 2015-10-15 | 2016-03-16 | 广东原创通信咨询设计有限公司 | Renewable energy grid -connected inverter monitored control system that communicates based on CAN bus |
| US20170256951A1 (en) * | 2016-03-05 | 2017-09-07 | Daniel Crespo-Dubie | Distributed System and Methods for Coordination, Control, and Virtualization of Electric Generators, Storage and Loads. |
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| "The ECU control of diesel engine based on CAN";Dong Hui等;《2011 Fourth International Conference on Intelligent Computation Technology and Automation》;20110415;第734-736页 |
| "基于SAEJ1939 协议的柴油机监控系统";蔡志伟等;《内燃机车》;20090531(第5期);第23-25页 |
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