CN109038797A - Virtual synchronous generator control and constant voltage constant frequency control online method for handover control - Google Patents
Virtual synchronous generator control and constant voltage constant frequency control online method for handover control Download PDFInfo
- Publication number
- CN109038797A CN109038797A CN201810844605.7A CN201810844605A CN109038797A CN 109038797 A CN109038797 A CN 109038797A CN 201810844605 A CN201810844605 A CN 201810844605A CN 109038797 A CN109038797 A CN 109038797A
- Authority
- CN
- China
- Prior art keywords
- control
- synchronous generator
- virtual synchronous
- voltage
- constant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Abstract
The invention discloses a kind of virtual synchronous generator controls and constant voltage constant frequency to control online method for handover control; it is included in the step of virtual synchronous generator control is switched to constant voltage constant frequency control when receiving shipboard generator outage signal, and constant voltage constant frequency is controlled into the step of being switched to virtual synchronous generator control when receiving shipboard start command generator.Pass through controlling tactic switch order, realize the online seamless switching of virtual synchronous generator control and constant voltage constant frequency control, handoff procedure is smoothly without impact, both in parallel stable operation of the shore electric power with shipboard synchronous generator had been ensure that, simultaneously when shore electric power is individually for ship load supplying, the stability of voltage magnitude and frequency is improved, and the present invention realizes simply, has the advantages that at low cost and high reliablity.
Description
Technical field
The invention belongs to bank electricity control fields, and in particular to a kind of virtual synchronous generator control and constant voltage constant frequency control exist
It is online seamless to realize that ship high voltage shore power power supply virtual synchronous generator control and constant voltage constant frequency control for line method for handover control
Switching.
Background technique
Ship shore electric, which refers to, stops all boat diesel engine power station operatings when ship pool goes to dock, by ship electricity consumption
Change and provided by shore electric power, air quality can be improved in this way, reduce the vibration of noise and port area, while improving economic effect
Benefit.Ship shore electric is suitable for the occasions such as harbour, shipbuilding and repair yards, floating dock, marine drilling platform.Currently, domestic harbour bank electricity electricity
The source overwhelming majority is using the mode of power-off access load, and the mode is frequently with constant voltage constant frequency control strategy.And power off access need to be
Ship stops diesel-driven generator after pulling in shore, then connect again with power supply on the bank, it will usually spend 2-3 hour, not only process is numerous
It is trivial, also bring inconvenience to electricity consumption on ship.Therefore access load becomes a kind of trend in the case of not powering off.
For constantly mode is electrically accessed, virtual synchronous generator control is in parallel with shipboard synchronous generator in shore electric power
It can guarantee stable operation in parallel under operating condition, while when shore electric power individually gives ship load supplying, constant voltage constant frequency control
Improve the amplitude of voltage and the stability of frequency.Therefore, virtual synchronous generator control and constant voltage constant frequency control are online seamless
Switching can be realized the grid-connected and off-grid stable operation of shore electric power, meet the needs of load.
Summary of the invention
It is an object of the invention to be directed to above-mentioned the problems of the prior art, provide a kind of virtual synchronous generator control and
When constant voltage constant frequency controls online method for handover control, shore electric power and the parallel running of shipboard synchronous generator, there is damping and be used to
Property characteristic, it is stable, at the same when shore electric power off-network is individually powered constant voltage constant frequency export, improve the amplitude and frequency of voltage
Stability.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
It is included in when receiving shipboard generator outage signal and virtual synchronous generator control is switched to constant voltage constant frequency control
The step of processed, and constant voltage constant frequency control is switched to virtual synchronous generator control when receiving shipboard start command generator
The step of processed；
1) the step of virtual synchronous generator control being switched to constant voltage constant frequency control includes: by virtual synchronous generator control
Electromagnetic torque Te in system is set as 0, and sets 0 for the voltage Δ U that the sagging control of reactive voltage generates；
2) the step of constant voltage constant frequency control being switched to virtual synchronous generator control includes: by virtual synchronous generator control
Electromagnetic torque Te in system is set as the active-power P of practical shore electric power outpute/ωo, voltage Δ U is by the sagging control of reactive voltage
System generates.
Step 1) is by the electromagnetic torque T in virtual synchronous generator controleIt is set as 0, then Machinery Transfer Function are as follows:
In above formula,
Tm=Kp(ωo- ω)=KpΔω (2)
Td=D Δ ω (3)
Simultaneous (1), (2) and (3) formula obtains:
In formula, ωoFor with reference to angular frequency, ω is reality output angular frequency, KpFor active frequency droop coefficient, TmFor machine
Tool torque, TdFor damping torque, J is inertia time constant, and D is damped coefficient；
Δ ω=0 is obtained by formula (4), then ω=ωo。
Virtual synchronous generator control transmission function G in step 2)1(s) are as follows:
(5) formula is arranged as first order inertial loop:
In above formula, ωpccFor high voltage shore power power supply and common point angular frequency when ship parallel running, PnIt is specified active
Power；
When receiving ship starting, by TeIt is set as actual electromagnetic power Pe/ωo, ω=ωo+ω。
Step 1) enables △ U=0 when receiving all generator outage orders of shipboard, then reference voltage is uref=Uo,
For steady state value, then realize that virtual synchronous generator control is switched to Isobarically Control online.
Sagging control, reference voltage u is added when receiving shipboard start command generator in the step 2)ref=Uo
+Kq*(Qref- Q), the Q in formularefFor with reference to reactive power, Q is shore electric power output reactive power, KqFor the sagging system of reactive voltage
Number, UoFor reference voltage amplitude, output voltage amplitude is related to the output reactive power of shore electric power, then realizes Isobarically Control
It is switched to virtual synchronous generator control online.
10kV/50Hz bank electricity network voltage is divided into through Multiple coil phase-shifting transformer to the winding of 18 groups of outs of phase first,
Then be direct current through three-phase diode rectifier rectification, inputted respectively as the direct current of every group of H-bridge unit, after cascade through inversion,
6.6kV/60Hz is exported after LC filter filtering and transformer isolation, and then realizes the power supply to load.
Compared with prior art, the present invention has following the utility model has the advantages that when receiving shipboard generator outage signal,
Virtual synchronous generator control is switched to constant voltage constant frequency control, when receiving shipboard start command generator, by constant pressure and constant
Frequency control is switched to virtual synchronous generator control, by controlling tactic switch order, realize virtual synchronous generator control with
The online seamless switching of constant voltage constant frequency control, handoff procedure both ensure that shore electric power and shipboard synchronous generator smoothly without impact
The stable operation in parallel of machine, while when shore electric power is individually for ship load supplying improves the steady of voltage magnitude and frequency
It is qualitative, and the present invention realizes simply, has the advantages that at low cost and high reliablity.
Detailed description of the invention
Fig. 1 ship high voltage shore power power system structure block diagram；
Fig. 2 ship high voltage shore power power cellular construction circuit diagram；
Fig. 3 ship high voltage shore power power supply virtual synchronous generator control and constant voltage constant frequency control switching block diagram；
Fig. 4 ship high voltage shore power power supply virtual synchronous generator control turns constant frequency control block diagram；
Fig. 5 ship high voltage shore power power supply virtual synchronous generator control turns Isobarically Control block diagram；
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings.
Referring to Fig. 1-2,10kV/50Hz bank electricity network voltage is divided into 18 groups through Multiple coil phase-shifting transformer first by the present invention
Then the winding of out of phase is direct current through three-phase diode rectifier rectification, defeated respectively as the direct current of every group of H-bridge unit
Enter, export 6.6kV/60Hz voltage after cascade after inversion, LC filter filtering and transformer isolation, realizes the confession to load
Electricity.
Referring to Fig. 3, virtual synchronous generator control of the present invention and the online switching of constant voltage constant frequency control include: to work as to receive ship
When all generator outages in side, virtual synchronous generator control is switched to constant voltage constant frequency control, when receiving shipboard start command
When, constant voltage constant frequency control is switched to virtual synchronous generator control.Referring to fig. 4-5, switching includes two aspects: first, it is virtual same
Step generator control switches online with Isobarically Control；Second, virtual synchronous generator control and constant frequency control switch online.
In figure, ωoFor with reference to angular frequency, ω is reality output angular frequency, KpFor active frequency droop coefficient, TmFor machinery
Torque, TeFor electromagnetic torque, TdFor damping torque, J is inertia time constant, and D is damped coefficient, QrefFor with reference to reactive power, Q
For shore electric power output reactive power, KqFor the sagging coefficient of reactive voltage, UoFor reference voltage amplitude.
1) virtual synchronous generator control and the online switching of constant frequency control；
A. it is switched to constant frequency control online:
Electromagnetic torque in virtual synchronous generator control strategy is set into 0, i.e. Te=0, mechanical part transmission function are as follows:
Tm=Kp(ωo- ω)=KpΔω (2)
Td=D Δ ω (3)
(1), (2) and (3) formula of arrangement obtains:
According to (4) formula, it can be deduced that:
Δ ω=0
Therefore, when receive be switched to constant voltage constant frequency control when, by TeIt is set as zero, virtual synchronous generator can be existed
Line seamlessly switches to constant frequency mode, at this time ω=ωo。
B. it is switched to virtual synchronous generator control mode online；
By the electromagnetic torque T in virtual synchronous generator controleIt is set as Te=Pe/ωo；
Virtual synchronous generator control transmission function G1(s) are as follows:
(5) formula is arranged as first order inertial loop, can be obtained:
In formula (5), ωpccFor high voltage shore power power supply and common point angular frequency when ship parallel running, PnFor specified wattful power
Rate.
By formula (5) it is found that the variation of power causes the variation of angular frequency, when receiving ship starting, by TeSetting
For actual electromagnetic power Pe/ωo, constant voltage constant frequency can be controlled and be switched to virtual synchronous generator control online, at this point, ω=
ωo+ω。
2) virtual synchronous generator control switches Isobarically Control online
A. it is switched to Isobarically Control online
When receiving all generator outage orders of shipboard, Δ U=0 is enabled, then reference voltage is uref=Uo, it is one permanent
Definite value then realizes that virtual synchronous generator control is switched to Isobarically Control online.
B. it is switched to virtual synchronous generator control online
When receiving shipboard start command, sagging control is added, then reference voltage uref=Uo+Kq*(Qref- Q), output
Voltage magnitude is related with shore electric power output reactive power, then realizes that Isobarically Control is switched to virtual synchronous generator control online
System.
Claims (6)
1. a kind of virtual synchronous generator control and constant voltage constant frequency control online method for handover control, it is characterised in that: be included in
The step of virtual synchronous generator control is switched to constant voltage constant frequency control when receiving shipboard generator outage signal, Yi Ji
The step of constant voltage constant frequency control is switched to virtual synchronous generator control when receiving shipboard start command generator；
1) the step of virtual synchronous generator control being switched to constant voltage constant frequency control includes: will be in virtual synchronous generator control
Electromagnetic torque Te be set as 0, and set 0 for the voltage Δ U that the sagging control of reactive voltage generates；
2) the step of constant voltage constant frequency control being switched to virtual synchronous generator control includes: will be in virtual synchronous generator control
Electromagnetic torque Te be set as the active-power P of practical shore electric power outpute/ωo, voltage Δ U is by the sagging control life of reactive voltage
At.
2. virtual synchronous generator control according to claim 1 and constant voltage constant frequency control online method for handover control,
It is characterized in that, step 1) is by the electromagnetic torque T in virtual synchronous generator controleIt is set as 0, then Machinery Transfer Function are as follows:
In above formula,
Tm=Kp(ωo- ω)=KpΔω (2)
Td=D Δ ω (3)
Simultaneous (1), (2) and (3) formula obtains:
In formula, ωoFor with reference to angular frequency, ω is reality output angular frequency, KpFor active frequency droop coefficient, TmTurn for machinery
Square, TdFor damping torque, J is inertia time constant, and D is damped coefficient；
Δ ω=0 is obtained by formula (4), then ω=ωo。
3. virtual synchronous generator control according to claim 2 and constant voltage constant frequency control online method for handover control,
It is characterized in that, the virtual synchronous generator control transmission function G in step 2)1(s) are as follows:
(5) formula is arranged as first order inertial loop:
In above formula, ωpccFor high voltage shore power power supply and common point angular frequency when ship parallel running, PnFor rated active power；
When receiving ship starting, by TeIt is set as actual electromagnetic power Pe/ωo, ω=ωo+ω。
4. virtual synchronous generator control according to claim 1 and constant voltage constant frequency control online method for handover control,
It is characterized in that, step 1) enables △ U=0 when receiving all generator outage orders of shipboard, then reference voltage is uref=Uo,
For steady state value, then realize that virtual synchronous generator control is switched to Isobarically Control online.
5. virtual synchronous generator control according to claim 4 and constant voltage constant frequency control online method for handover control,
It is characterized in that, sagging control, reference voltage u is added when receiving shipboard start command generator in the step 2)ref=
Uo+Kq*(Qref- Q), the Q in formularefFor with reference to reactive power, Q is shore electric power output reactive power, KqIt is sagging for reactive voltage
Coefficient, UoFor reference voltage amplitude, output voltage amplitude is related to the output reactive power of shore electric power, then realizes constant pressure control
System is switched to virtual synchronous generator control online.
6. virtual synchronous generator control according to claim 1 and constant voltage constant frequency control online method for handover control,
It is characterized in that, 10kV/50Hz bank electricity network voltage is divided into through Multiple coil phase-shifting transformer to the winding of 18 groups of outs of phase first,
Then be direct current through three-phase diode rectifier rectification, inputted respectively as the direct current of every group of H-bridge unit, after cascade through inversion,
6.6kV/60Hz is exported after LC filter filtering and transformer isolation, and then realizes the power supply to load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810844605.7A CN109038797B (en) | 2018-07-27 | 2018-07-27 | Virtual synchronous generator control and constant-voltage constant-frequency control on-line switching control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810844605.7A CN109038797B (en) | 2018-07-27 | 2018-07-27 | Virtual synchronous generator control and constant-voltage constant-frequency control on-line switching control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109038797A true CN109038797A (en) | 2018-12-18 |
| CN109038797B CN109038797B (en) | 2022-03-01 |
Family
ID=64646267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810844605.7A Active CN109038797B (en) | 2018-07-27 | 2018-07-27 | Virtual synchronous generator control and constant-voltage constant-frequency control on-line switching control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109038797B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972928A (en) * | 2014-04-18 | 2014-08-06 | 国家电网公司 | Microgrid and microsource control method based on virtual synchronous electric generator |
| CN104158181A (en) * | 2014-08-14 | 2014-11-19 | 清华大学 | Reversible variable-flow shore power control method based on virtual synchronous generator |
| CN105811400A (en) * | 2016-03-18 | 2016-07-27 | 国网上海市电力公司 | Self-adaptive control method for modes of low-voltage microgrid |
| CN107221955A (en) * | 2017-06-26 | 2017-09-29 | 国网青海省电力公司 | Virtual synchronous generator from grid-connected smooth-switching method |
| CN107317347A (en) * | 2017-08-24 | 2017-11-03 | 泰州学院 | Shore electric power system stable control method based on virtual synchronous generator |
| CN107623320A (en) * | 2017-09-27 | 2018-01-23 | 广州航海学院 | The method and device of 50Hz 60Hz bank electricity seamless switchings ship electricity |
| US20180191281A1 (en) * | 2016-10-17 | 2018-07-05 | Qingchang ZHONG | Operating Doubly-Fed Induction Generators as Virtual Synchronous Generators |
-
2018
- 2018-07-27 CN CN201810844605.7A patent/CN109038797B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972928A (en) * | 2014-04-18 | 2014-08-06 | 国家电网公司 | Microgrid and microsource control method based on virtual synchronous electric generator |
| CN104158181A (en) * | 2014-08-14 | 2014-11-19 | 清华大学 | Reversible variable-flow shore power control method based on virtual synchronous generator |
| CN105811400A (en) * | 2016-03-18 | 2016-07-27 | 国网上海市电力公司 | Self-adaptive control method for modes of low-voltage microgrid |
| US20180191281A1 (en) * | 2016-10-17 | 2018-07-05 | Qingchang ZHONG | Operating Doubly-Fed Induction Generators as Virtual Synchronous Generators |
| CN107221955A (en) * | 2017-06-26 | 2017-09-29 | 国网青海省电力公司 | Virtual synchronous generator from grid-connected smooth-switching method |
| CN107317347A (en) * | 2017-08-24 | 2017-11-03 | 泰州学院 | Shore electric power system stable control method based on virtual synchronous generator |
| CN107623320A (en) * | 2017-09-27 | 2018-01-23 | 广州航海学院 | The method and device of 50Hz 60Hz bank electricity seamless switchings ship electricity |
Non-Patent Citations (2)
| Title |
|---|
| 吕志鹏: "虚拟同步发电机及其在微电网中的应用", 《中国电机工程学报》 * |
| 白薇,刘立群: "虚拟同步发电机的无缝切换控制技术", 《自动化仪表》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109038797B (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106602962B (en) | Work converting operation method for synchronously switching based on high-voltage frequency converter electric machine control system | |
| CN101304234B (en) | Power converters | |
| Zhaoxia et al. | Coordinated control of a hybrid-electric-ferry shipboard microgrid | |
| CN107947186B (en) | Starting control method for accessing high-voltage direct-current transmission inversion side to synchronous phase modulator | |
| CN104393672B (en) | A kind of motor seamless switching method of supplying power to estimated based on residual voltage | |
| CN104756347A (en) | Connection system for power generation system with DC output | |
| CN205489525U (en) | Uninterruptible power supply system | |
| US4481455A (en) | Method of starting variable-speed induction motor | |
| Chen et al. | An inrush current mitigation technique for the line-interactive uninterruptible power supply systems | |
| CN102255598A (en) | Method for controlling electronic pole inversion of multiphase induction motor on basis of vector control | |
| CN102420560B (en) | Excitation structure and alternating-current and direct-current excitation control method for frequency-variable alternating-current starting power generation system | |
| CN107979096A (en) | A kind of excitation control method during large-scale phase modifier startup is grid-connected | |
| Xiao et al. | Dynamic and steady-state power-sharing control of high-efficiency DC shipboard microgrid supplied by diesel generators | |
| CN110912464A (en) | Aircraft engine starting controller with active filtering function and starting/electric energy quality control system formed by aircraft engine starting controller | |
| CN100463328C (en) | Rotating electromagnetic energy transformation device | |
| CN109038797A (en) | Virtual synchronous generator control and constant voltage constant frequency control online method for handover control | |
| JP5395394B2 (en) | Generator series connection device | |
| CN110752804A (en) | Direct-current excitation closed-loop control method for aviation three-phase alternating-current excitation system | |
| CN108964045A (en) | Ship high voltage shore power power supply is constantly electrically accessed mode load handover control method | |
| RU137014U1 (en) | SHIP ELECTRIC POWER PLANT | |
| CN113394799A (en) | Compensation control system based on flywheel energy storage | |
| WO2010002051A1 (en) | Engine-generator provided with super capacitor | |
| CN104953912B (en) | Electrical Propulsion Ship frequency conversion speed-adjusting system based on matrix converter | |
| CN115036979B (en) | New energy power generation and transmission power utilization system based on open-winding motor and control method | |
| Banerjee et al. | Transient performance comparison of switched doubly-fed machine propulsion drives |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |