CN207753464U - The more same period point auto-parallel systems of generating set - Google Patents
The more same period point auto-parallel systems of generating set Download PDFInfo
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- CN207753464U CN207753464U CN201721837373.XU CN201721837373U CN207753464U CN 207753464 U CN207753464 U CN 207753464U CN 201721837373 U CN201721837373 U CN 201721837373U CN 207753464 U CN207753464 U CN 207753464U
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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
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/42—Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a kind of more same period point auto-parallel systems of generating set, by in I busbar, II busbar and being connected on each user's line on I, II busbar and being mounted on system side voltage measurement unit, generating set is when grid-connected, by on generator wait for and side voltage measurement unit is incuded with wherein any one system side voltage measurement unit, when meeting simultaneous interconnecting condition, cutting-in control unit is controlled in synchronous device, cutting-in control unit is made to open each grid-connected disconnecting link/switch successively.Compared with prior art, as long as any one same period point in network system is normal, the paired running of generator can be achieved, substantially increase the grid connection efficiency of generating set, ensure that the stable operation of the power supply and distribution in system side；The row swithes that the utility model is used to execute grid-connected action simultaneously are 2 so that row swithes failure one of in this system nor affects on the grid-connected of generator, and grid-connected more convenient and flexible in the selection of branch.
Description
Technical field
The utility model is related to a kind of generating set auto-parallel devices, and in particular to the more same period points of generating set are automatically simultaneously
Net system.
Background technology
In power plant, simultaneous interconnecting is a great operation before power plants generating electricity.Excitation, steam turbine, disconnecting link is needed to open
Cooperation between each systems such as pass, DCS controls, it is final to realize that generator stable is connected to the grid, stable electric power is sent into power grid.
Once misoperation may cause the abnormal accidents such as system fluctuation, oscillation, can be caused when serious generator asynchronous it is grid-connected, hair
The serious electrical accident that motor damage, power grid spring are netted.Generator synchronous grid-connected principle is：By acquiring generator (or main transformer
High-pressure side) voltage transformer (i.e. PT) in outlet voltage compared with the voltage of system side, when reaching setting condition (including
When the conditions such as voltage magnitude, phase sequence, phase, the frequency of both sides) reclosing command is sent out, it will by being closed generator outlet breaker
Generator and system grid connection realize electrical energy transportation.Generator synchronous grid-connected system is the key that generator and power grid paired running
The reliability of equipment, function is most important.It is existing to have automatic synchronizing paralleling, same manually for generating set simultaneous interconnecting pattern
Phase is grid-connected and automatic presynchronization is grid-connected, but no matter which kind of grid-connect mode used, generating set and network process be configured with phase
The synchronous device answered is to achieve the purpose that automatically control.
As shown in Figure 1, the partial electric connection figure of the conventional electric generators simultaneous interconnecting originally used for our company.From figure
It is not difficult to find out, exporting disconnecting link 20011 (being that row illustrate with I busbares) by transformer unit in system side is led to 220KVI busbares PT
Automatic sub-synchronous device waits for that simultaneously side 1PT or 2PT carry out same period condition confirmation as on generator.When grid-connected, when waiting for
And the voltage magnitude of side PT, phase sequence, phase, frequency with when all same, synchronous device can just send out closure power generation on busbar PT
Machine exports the instruction of knife switch, could complete the operation of generator connecting in parallel with system in this way.Therefore, the PT in system side is also referred to as grid-connected
Same period point, only there are one the same period points when traditional generator auto-parallel.Only there are one the generating set auto-parallels of same period point
Although technology is connecting up and is controlling the upper relatively simple operation of operation, when the outlet PT or generating set being located in bus bar side
When switch tool breaks down, generator is arranged side by side with system by termination, needs to wait for carry out after troubleshooting grid-connected.This
Sample not only delays the set grid-connection time, makes the fluctuation of service of the power supply and distribution in system side, reduces Business Economic Benefit；This
Outside, only there are one row swithes for the outlet of generator, and connection type is single, grid-connected to use underaction.
Utility model content
To overcome drawbacks described above, the technical problem to be solved by the utility model is to provide one kind with multiple mutual indepedent
Grid-connected same period point generating set auto-parallel system, as long as the grid-connected system have one of them same period point normal work
Realize the grid-connected of generating set.
In order to achieve the above objectives, the utility model is achieved through the following technical solutions：
The more same period point auto-parallel systems of generating set include for generator synchronous grid-connected network system and for controlling
The synchronous device of network system auto-parallel, the network system include I busbar being in parallel, II busbar and are connected on I busbar, II
N subscriber lines on busbar, the network system further include cutting-in control unit corresponding with the quantity of user's line, one with
Family line corresponds to the output end of one cutting-in control unit of access, the input terminal of cutting-in control unit and the branch where generator outlet
Road connects, and the cutting-in control unit is mounted on and controls generator between I busbar and II busbar and under the control of synchronous device
Execute grid-connected action；It is mounted on system side voltage measurement unit on I busbar, II busbar and each user's line, wherein n is >=
1 integer.
In said program, the cutting-in control unit may include a plug-in strip control unit, master control disconnecting link, secondary plug-in strip control
Unit, a row swithes and secondary row swithes processed, wherein
One end of plug-in strip control unit and the branch where generator outlet connect, and the other end is divided into two
Branch：A wherein branch is connected to after a row swithes on I busbar, the input terminal of another branch and master switch connects
It connects；The output end of the master switch is divided into two branches：Wherein a branch is connected to II after secondary plug-in strip control unit
Busbar, another branch are connect after secondary row swithes with corresponding user's line；On the branch road where generator outlet
Installation needs and side voltage measurement unit.
In said program, it is further preferred that the value of the n is 2, that is, there are 2 user's lines to be connected on I busbar, on II busbar.
The beneficial effects of the utility model are：
1) the utility model in I busbar, II busbar and being connected on each user's line on I, II busbar by being mounted on
System side voltage measurement unit, generating set when grid-connected, by generator wait for and side voltage measurement unit with wherein appoint
One system side voltage measurement unit of meaning is incuded, when meeting simultaneous interconnecting condition, in synchronous device to cutting-in control list
Member is controlled, to make cutting-in control unit open each grid-connected disconnecting link/switch successively.With only incuded there are one same period point
Existing simultaneous interconnecting device compare, as long as any one same period point (system side voltage measurement unit) in network system is just
Often, the paired running of generator can be achieved；And traditional interconnection technology can only be a same period point, once the same period in system side
Point break down will be unable to carry out generator and net operation.The grid-connected effect of generating set will be greatly improved using grid-connected system
Rate, and can guarantee the stable operation of power supply and distribution in system side, improve Business Economic Benefit；
2) row swithes in the cutting-in control unit designed in the utility model for executing grid-connected action are 2, are made
Row swithes failure one of in this system, nor affect on the grid-connected of generator, and it is grid-connected in the selection of branch more
It is convenient and flexible to add.
Description of the drawings
Fig. 1 is the partial electric connection figure of traditional 1 generating set auto-parallel.
When Fig. 2 is 3 same period points, the electrical connection diagram of 1 generating set auto-parallel.
When Fig. 3 is 3 same period points, the electrical connection diagram of 2 generating set auto-parallels.
1, system side voltage measurement unit, 2, wait for and side voltage measurement unit, 3, plug-in strip control units, 4, secondary lock
Knife control unit, 5, row swithes, 6, secondary row swithes, 7, master control disconnecting link, 8, cutting-in control unit.
Specific implementation mode
Embodiment 1
The more same period point auto-parallel systems of generating set include for generator synchronous grid-connected network system and for controlling
The synchronous device of network system auto-parallel.Composition and the same period used in the prior art in the synchronous device main body are simultaneously
Net device is the same.Except that：Each electrical detection component, control chopper switch on improved cutting-in control unit 8
The increase and connection of adaptability are done, and does adaptable logic control instruction in controller on synchronous device and improves.The electricity
Net system includes I busbar being in parallel, II busbar and is connected on I busbar, the n subscriber lines on II busbar.
The network system further includes cutting-in control unit corresponding with the quantity of user's line 8.As shown in Fig. 2, being one
Electrical connection diagram corresponding to subscriber lines when one group of generator connecting in parallel with system, i.e. n=1.It is grid-connected that one subscriber lines correspond to access one
The output end of control unit 8, the input terminal of cutting-in control unit 8 and the branch where generator outlet connect.Described and network control
Unit 8 processed, which is mounted between I busbar and II busbar and controls generator under the control of synchronous device, executes grid-connected action.
It is mounted on system side voltage measurement unit 1 on I busbar, II busbar and each user's line.The system side voltage measurement unit 1
PT points as in network system, the specially same period point of generator connecting in parallel with system.It is not difficult to find out from Fig. 2, even if on two busbares
It only connects there are one user's line, also has 3 same period points in this simultaneous interconnecting system, be in I busbar, II busbar and user's line successively
On.
In the present embodiment, the cutting-in control unit 8 includes a plug-in strip control unit 3, master control disconnecting link 7, secondary plug-in strip
4, row swithes 5 of control unit and secondary row swithes 6.One end of plug-in strip control unit 3 goes out with generator
Branch connection where mouthful, the other end are divided into two branches：A wherein branch is connected to I mother after a row swithes 5
On line, the input terminal of another branch and master switch connects.The output end of the master switch is divided into two branches：Wherein one
Branch be connected to after secondary plug-in strip control unit 4 II busbar, another branch after secondary row swithes 6 with it is corresponding
User's line connects.It is equipped on the branch road where generator outlet and waits for simultaneously side voltage measurement unit 2, wait for simultaneously side voltage measurement list
Member 2 is on installation generator outlet and PT corresponding with the PT points in system side.
Above system side voltage measurement unit 1 and wait for and side voltage measurement unit 2 be specifically existing structure voltage it is mutual
Sensor and mating electric components.
4, row swithes 5 of a plug-in strip control unit 3, master control disconnecting link 7, secondary plug-in strip control unit of above-mentioned use
With secondary row swithes 6 use electrical equipment model, quantity and composition according to the voltage value on I busbar, II busbar come into
Row selection.
The utility model is when in use：1) when on I busbar and II busbar system side voltage measurement unit 1 and two mothers
When each way switch disconnecting link on line is normal, wait for and side voltage measurement unit 2 preferentially with the system side voltage measurement list on I busbar
Member 1 is corresponded to, and when the parameter obtained after corresponding mutual inductance meets the condition of simultaneous interconnecting, synchronous device remote control is primary
3, row swithes 5 of plug-in strip control unit, master switch and secondary plug-in strip control unit 4 are opened, and generator executes grid-connected behaviour
Make；
2) when the switch tool on the system side voltage measurement unit 1 or busbar on I busbar and II busbar breaks down,
It waits for and side voltage measurement unit 2 carries out corresponding with the system side voltage measurement unit 1 on user's line, obtained after corresponding mutual inductance
When parameter meets the condition of simultaneous interconnecting, 3, row swithes 5 of plug-in strip control unit of synchronous device remote control, master
Control switch, secondary plug-in strip control unit 4 and secondary row swithes 6 are opened, and generator executes and net operation.
Embodiment 2
As shown in figure 3, the more same period point auto-parallel systems of generating set and embodiment 1 are the difference is that the n
Value is 2.That is two user's lines are connected on I busbar, on II busbar, and there are two generators to carry out simultaneous interconnecting in simultaneous interconnecting
There are 3 same period points in system, is on I busbar, II busbar and user's line successively.Certainly, according to the power supply and distribution demand of power grid,
The user's line accessed on two busbares can be multiple, therefore the same period point quantity where it in system side of simultaneous interconnecting also corresponds to
Increase, can further improve the reliability of simultaneous interconnecting.
It these are only the embodiment for illustrating the utility model, be not intended to limit the utility model, for this field
For technical staff, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (3)
1. the more same period point auto-parallel systems of generating set include for generator synchronous grid-connected network system and for controlling electricity
The synchronous device of net system auto-parallel, the network system include I busbar being in parallel, II busbar and are connected on I busbar, II female
N subscriber lines on line, it is characterised in that：The network system further includes cutting-in control list corresponding with the quantity of user's line
First (8), a subscriber lines correspond to the output end of one cutting-in control unit (8) of access, cutting-in control unit (8) input terminal with
Branch connection where generator outlet, the cutting-in control unit (8) are mounted between I busbar and II busbar and in the same period
Control generator executes grid-connected action under the control of device；It is mounted on system side on I busbar, II busbar and each user's line
Voltage measurement unit (1), the integer that wherein n is >=1.
2. the more same period point auto-parallel systems of generating set according to claim 1, it is characterised in that：The cutting-in control
Unit (8) includes a plug-in strip control unit (3), master control disconnecting link (7), secondary plug-in strip control unit (4), a row swithes
(5) and secondary row swithes (6), wherein one end of the primary plug-in strip control unit (3) and the branch where generator outlet
Connection, the other end are divided into two branches：A wherein branch is connected to after a row swithes (5) on I busbar, another
The input terminal of branch and master switch connects；The output end of the master switch is divided into two branches：Wherein a branch is through two
Be connected on II busbar after secondary plug-in strip control unit (4), another branch after secondary row swithes (6) with corresponding user
Line connects；It is equipped on the branch road where generator outlet and waits for simultaneously side voltage measurement unit (2).
3. the more same period point auto-parallel systems of generating set according to claim 1, it is characterised in that：The value of the n is
2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711419496.6A CN107887931A (en) | 2017-12-25 | 2017-12-25 | The more same period point auto-parallel systems of generating set |
| CN201721837373.XU CN207753464U (en) | 2017-12-25 | 2017-12-25 | The more same period point auto-parallel systems of generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711419496.6A CN107887931A (en) | 2017-12-25 | 2017-12-25 | The more same period point auto-parallel systems of generating set |
| CN201721837373.XU CN207753464U (en) | 2017-12-25 | 2017-12-25 | The more same period point auto-parallel systems of generating set |
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| CN201721837373.XU Active CN207753464U (en) | 2017-12-25 | 2017-12-25 | The more same period point auto-parallel systems of generating set |
| CN201711419496.6A Pending CN107887931A (en) | 2017-12-25 | 2017-12-25 | The more same period point auto-parallel systems of generating set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887931A (en) * | 2017-12-25 | 2018-04-06 | 国投钦州发电有限公司 | The more same period point auto-parallel systems of generating set |
| 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556875A (en) * | 2018-05-31 | 2019-12-10 | 深圳中广核工程设计有限公司 | Unit synchronization system for large power plant |
| CN111934353B (en) * | 2020-07-03 | 2022-07-05 | 华电电力科学研究院有限公司 | Method for obtaining false synchronization grid-connected signals of unit and optimizing synchronization grid-connected signals |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100315981B1 (en) * | 1999-12-29 | 2001-12-12 | 김형국 | Test device for Generator automatic synchronizer |
| CN106099973A (en) * | 2016-06-29 | 2016-11-09 | 华能重庆两江燃机发电有限责任公司 | A kind of Rhizoma Sparganii M701F4 type 3 simultaneous interconnecting implementation methods of unit gas turbine transformer unit |
| CN106684927B (en) * | 2017-03-30 | 2019-04-02 | 山东中实易通集团有限公司 | A kind of medium-and-large-sized generating set grid-connected system of Isolated Network System and combination method |
| CN207753464U (en) * | 2017-12-25 | 2018-08-21 | 国投钦州发电有限公司 | The more same period point auto-parallel systems of generating set |
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2017
- 2017-12-25 CN CN201721837373.XU patent/CN207753464U/en active Active
- 2017-12-25 CN CN201711419496.6A patent/CN107887931A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887931A (en) * | 2017-12-25 | 2018-04-06 | 国投钦州发电有限公司 | The more same period point auto-parallel systems of generating set |
| 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 |
| CN110011353B (en) * | 2019-03-19 | 2022-12-27 | 上海唐银投资发展有限公司 | Parallel operation control system and method for diesel generator power supply and distribution system |
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| CN107887931A (en) | 2018-04-06 |
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