CN106655198A - Ship voltage drop suppression electrical system and control method thereof - Google Patents
Ship voltage drop suppression electrical system and control method thereof Download PDFInfo
- Publication number
- CN106655198A CN106655198A CN201610962735.1A CN201610962735A CN106655198A CN 106655198 A CN106655198 A CN 106655198A CN 201610962735 A CN201610962735 A CN 201610962735A CN 106655198 A CN106655198 A CN 106655198A
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- CN
- China
- Prior art keywords
- voltage
- current
- supply
- ship
- module
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- 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.)
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Classifications
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
Abstract
The invention relates in particular to a voltage drop suppression electrical system, which includes an external power and a load. A voltage and current controller comprises a current closed-loop control module, being configured with a reference current, and outputting a current adjustment signal for enabling a supply current to vary with the reference current; a voltage closed-loop control module, being configured with a reference voltage, and outputting a voltage adjustment signal for enabling a supply voltage to vary with the reference voltage; and a voltage drop judgment module, generating, when a voltage drop is judged, a first preset current larger than the reference current and a first preset voltage smaller than the reference voltage, and meanwhile, substituting the first preset current and the first preset voltage for the reference current and the reference voltage, respectively. When a ship is powered by a shore-based power supply system, the start of a large load will result in the problems of current shock and voltage drop. However, the invention can control the magnitude of the voltage drop, ensure continuous operation of critical electrical equipment of the ship, and shorten the voltage recovery time to 400 milliseconds or more.
Description
Technical field
The present invention relates to electrical system control field, and in particular to a kind of Voltage Drop suppresses electrical system.
Background technology
Electrical system species is more, and application is relatively wide, wherein when high power load starts suddenly on ship, the drawing that can be exceedingly fast
The output voltage of low bank base ship power supply, current current transformer is generally replaced using frequency converter and used, and it is based on electricity that strategy is mostly
The control strategy that machine drives, it is longer to the reply time of Voltage Drop, it is impossible to really to meet the electricity consumption needs during ship pulls in shore.
The control strategy of converter part is normally based on motor-driven VVVF or vector control strategy, and such strategy allows electricity
Pressure drops to 65% (Voltage Drop amplitude 35%), while the time fallen longer (reaching tens of seconds) is allowed, while motor
Load characteristic it is single, also can work long hours under under-voltage condition, but due on ship to be loaded with linear load, perception negative
The load of the multifrequency natures such as load, nonlinear load, capacitive load, and such as radar, instrument, sensor or refrigeration pressure on ship
The voltage stability requirement of contracting machine is high, and the usual Voltage Drop time, the amplitude fallen was no more than no more than 1.5 seconds
20%, otherwise these equipment can shut down, and can cause economic loss and driving safety problem to ship.And the Voltage Drop time
Increase, impact can be produced on load, if single load, the drop-out time that can allow for is longer, and if various loads,
Once so Voltage Drop time increases, the equipment downtime higher to voltage stability is may result in, cause safety problem.
The content of the invention
It is a first object of the present invention to provide a kind of ship power supply system, solves above technical problem；
The second object of the present invention is to provide a kind of suppression voltage drop control method.
Technical problem solved by the invention can employ the following technical solutions to realize：A kind of ship power supply system, bag
External power source and load are included, is also included
Power manager, couples external power source and exports supply current, is controlled by regulated voltage signal and/or electric current is adjusted
Signal works；
Isolating transformer, coupling power manager receives supply current and exports a supply voltage；
Voltage x current controller, is respectively coupled to isolating transformer and power manager and sample supply current and power supply electricity
Pressure；
The voltage x current controller includes
Closed-loop current control module, configures a reference current, and output makes supply current follow the one of reference current change
Current regulating signal；
Voltage close loop control module, configures a reference voltage, and output makes supply voltage follow the one of reference voltage change
Regulated voltage signal；
Voltage Drop judge module, when judging Voltage Drop, generates more than the first predetermined current of reference current and little
In the first predeterminated voltage of reference voltage, while the first predetermined current and the first predeterminated voltage are replaced respectively into reference current and base
Quasi- voltage.
In general, electric power system includes the function such as rectification, inversion, and pass through power supervisor will export correspondence power,
The electric current of phase place, voltage, and pass through voltage x current controller just can carry out closed-loop control to voltage and current, and closed-loop control
In system, by the acquisition to reference current and reference voltage, and so as to adjust whole system in output voltage and output electricity
Stream, that is, supply voltage and supply current, but if running into Voltage Drop situation, then mould is judged by Voltage Drop
Block, reference voltage electric current is replaced, and the technology can preset excitation mutation current limit value, when Voltage Drop, encourage
Magnetoelectricity stream can increase suddenly, when reaching setting value, output voltage slightly be reduced in short-term, to suppress load to uprush caused high current
Output, and quickly again voltage is risen to into load voltage value, the technology can recover voltage to rated voltage in 550ms
80%, recover then to rated voltage, total time 1.5s is less than, by above-mentioned technology, different situations can be corresponded to and adjusted
Section, it is relatively simple reasonable, and substantially increase voltage rejection ability.
Further, the voltage x current controller also includes time delay module, when the time delay module configuration first is preset
Between, when the supply current reaches the first predetermined current, the time delay module is started working and substitutes the first predeterminated voltage
Reference voltage, when the first Preset Time is reached, the time delay module exports reset signal, and the Voltage Drop judge module is controlled
Quit work in reset signal.By sequential control and the design of the first Preset Time, can cause to carry out at short notice
The replacement of voltage reference value so that voltage reduces, however it is necessary that design voltage reduces the time, the time of suppression will not be long.
Further, the voltage x current controller also includes comparison module, and the comparison module is pre- for comparing first
If the size of electric current and supply current, when the first predetermined current is equal to supply current, the comparison module output enabling signal,
The voltage x current controller is controlled by enabling signal and the first predeterminated voltage is replaced into reference voltage.Letter is arranged by comparison module
Single CL Compare Logic, it is ensured that output voltage, electric current are rationally, convenient to power and manage.
Further, the power manager include frequency converter, the frequency converter include rectifier transformer, rectification circuit and
Inverter circuit.
Further, the power manager also include sinusoidal filter, the sinusoidal filter be coupled to frequency converter with
Between isolating transformer.
Further, the output of the power manager is connected to ship transformer by cable.
In order to realize the second object of the present invention, one kind suppresses voltage drop control method, step 1, real-time monitoring to power
Electric current, step 2 is entered when supply current reaches the first predetermined current；Step 2, adjusts supply voltage and is decreased to the first default electricity
Pressure；Step 3, maintains first the first Preset Time of predeterminated voltage, and the voltage that restores electricity is to normal condition.
Beneficial effect：Due to using above technical scheme, when effectively solving ship is powered by bank base power-supply system, heavy load
Rush of current and Voltage Drop problem, ensure that the availability of bank base ship power supply caused by starting.Traditional shore electric power,
Easily the heavy load on ship starts or moment delays machine, or voltage recovery time is longer, and the present invention then can control voltage and fall
The amplitude for falling, it is ensured that the continuous service of ship key electrical equipment.
Description of the drawings
Fig. 1 is the system topology schematic diagram of the embodiment of the ship electric power system of the present invention；
Fig. 2 is the regulation oscillogram of the embodiment of the ship electric power system of the present invention.
Reference：100th, power manager；110th, frequency converter；200th, Current Voltage controller；210th, Voltage Drop is sentenced
Disconnected module.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the embodiment and the feature in embodiment in the present invention can phase
Mutually combination.
Below in conjunction with the accompanying drawings the invention will be further described with specific embodiment, but not as limiting to the invention.
With reference to Fig. 1, by taking ship electric power system as an example, ship power supply system is sketched first,
External power source is powered using electrical network, and the power manager 100 includes frequency converter 110, sinusoidal filter, becomes every straight
Depressor, wiring cabinet, by cable connection in each ship, the frequency converter 110 includes rectifier transformer, rectification circuit to wiring cabinet
And inverter circuit.The frequency converter 110 includes rectifier transformer, rectification circuit and inverter circuit.Sinusoidal filter is coupled to change
Between frequency device 110 and isolating transformer.Each ship all includes two kinds of electric power systems, bank electricity and ship electricity detecting system, positive reason
Under condition, the impact caused by switching mode Voltage Drop is provided with contact structure between two systems, facilitate automatically controlled cutting
Change, but pass through this kind of technology at present so that Voltage Drop phenomenon is inhibited.
Fig. 1 is referred again to, Current Voltage controller 200 realizes adopting in real time to output by current detecting and voltage detecting
Sample, so, it is possible to the situation of Voltage Drop is judged by moment and then the output voltage of a pair of reality can be just exported
It is adjusted, that is, by changing original reference voltage, it is possible to adjust output voltage, electric current, play suppression voltage
Effect.
With reference to shown in Fig. 2, when electromagnetic electric current mutation is detected, output voltage postpones 10 milliseconds reduces voltage (half week
Phase), start to limit electric current output in time point 1, the system adopts bicyclic detection feedback, Voltage loop and electric current loop is supervised respectively
Survey, detect for exciting current is sharp, and accurately falling for detection voltage (is different from traditional frequency conversion device 110 with recovery amplitude
Single feedback or without feedback control), while being improved by multiplying power to inverter circuit, Voltage Drop fast recovery technique, multiplying power level
The indescribably carrier frequency of high current transformer, the requirement of high-speed response voltage lifting.(it is different from the carrier frequency of conventional current transformer 1kHz
Rate, the voltage waveform smoothness of the invention order output is high, and the time that voltage recovers can be in Millisecond)；Perseverance based on electrical network
Power output control (is different from VVVF controls or the vector controlled of conventional current transformer, using PQ control modes, for current transformer
Power output is adjusted, it is ensured that the constant power output during current transformer steady operation)；It is idle with active controllable (load is prominent
Voltage pulsation caused by becoming can cause output during multiple-variable flow device parallel running uneven, by reactive current and watt current
Detection ＆ Controling, realize the function of multiple-variable flow device Differential Output so that voltage pulsation recovery time shorten.
Particularly ship power supply system, compared with multi-load case, so needing to suppress Voltage Drop in time and ensure whole confession
Electric system is unaffected, while, it is to avoid boat-carrying power supply is polluted using generating.Further, the power manager 100
Output is connected to ship transformer by cable.A kind of Voltage Drop suppresses electrical system, including external power source and load, also wraps
Power manager 100 is included, external power source is coupled and is exported supply current, be controlled by regulated voltage signal and/or electric current adjusts letter
Number work；Isolating transformer, coupling power manager 100 receives supply current and exports a supply voltage；Voltage x current controller,
It is respectively coupled to isolating transformer and power manager 100 and sample supply current and supply voltage；The voltage x current control
Device includes closed-loop current control module, configures a reference current, and it is electric to export make supply current follow reference current change one
Stream Regulate signal；Voltage close loop control module, configures a reference voltage, and output makes supply voltage follow what reference voltage changed
One regulated voltage signal；Voltage Drop judge module 210, when judging Voltage Drop, generates and is preset more than the first of reference current
Electric current and the first predeterminated voltage less than reference voltage, while the first predetermined current and the first predeterminated voltage are replaced respectively into base
Quasi- electric current and reference voltage.
In general, electric power system includes the function such as rectification, inversion, and pass through power supervisor will export correspondence power,
The electric current of phase place, voltage, and pass through voltage x current controller just can carry out closed-loop control to voltage and current, and closed-loop control
In system, by the acquisition to reference current and reference voltage, and so as to adjust whole system in output voltage and output electricity
Stream, that is, supply voltage and supply current, but if running into Voltage Drop situation, then by Voltage Drop judge module
210, reference voltage electric current is replaced, the technology can preset excitation mutation current limit value, when Voltage Drop, encourage
Magnetoelectricity stream can increase suddenly, when reaching setting value, output voltage slightly be reduced in short-term, to suppress load to uprush caused high current
Output, and quickly again voltage is risen to into load voltage value, the technology can recover voltage to rated voltage in 550ms
80%, recover then to rated voltage, total time 1.5s is less than, by above-mentioned technology, different situations can be corresponded to and adjusted
Section, it is relatively simple reasonable, and substantially increase voltage rejection ability.
Further, the voltage x current controller also includes time delay module, when the time delay module configuration first is preset
Between, when the supply current reaches the first predetermined current, the time delay module is started working and substitutes the first predeterminated voltage
Reference voltage, when the first Preset Time is reached, the time delay module exports reset signal, the Voltage Drop judge module 210
It is controlled by reset signal to quit work.By sequential control and the design of the first Preset Time, can cause at short notice
Carry out the replacement of voltage reference value so that voltage reduces, however it is necessary that design voltage reduces the time, the time of suppression will not be long.
The voltage x current controller also includes comparison module, and the comparison module is used to compare the first predetermined current and supply current
Size, when the first predetermined current is equal to supply current, the comparison module output enabling signal, the voltage x current controller
It is controlled by enabling signal and the first predeterminated voltage is replaced into reference voltage.Simple CL Compare Logic is arranged by comparison module, it is ensured that defeated
Go out voltage, electric current rationally, it is convenient to power and manage.
Preferred embodiments of the present invention are the foregoing is only, embodiments of the present invention and protection model is not thereby limited
Enclose, to those skilled in the art, should can appreciate that done by all utilization description of the invention and diagramatic content
Scheme obtained by equivalent and obvious change, should be included in protection scope of the present invention.
Claims (7)
1. a kind of ship power supply system, including external power source is loaded with ship, it is characterised in that also included
Power manager, couples external power source and exports supply current, is controlled by regulated voltage signal and/or current regulating signal
Work；
Isolating transformer, coupling power manager receives supply current and exports a supply voltage；
Voltage x current controller, is respectively coupled to isolating transformer and power manager and sample supply current and supply voltage；
The voltage x current controller includes
Closed-loop current control module, configures a reference current, and output makes the electric current that supply current follows reference current to change
Regulate signal；
Voltage close loop control module, configures a reference voltage, and output makes the voltage that supply voltage follows reference voltage to change
Regulate signal；
Voltage Drop judge module, receives supply current, when supply current is more than the first pre-set current value, generates and is less than benchmark
First predeterminated voltage of voltage, while the first predeterminated voltage is replaced into reference voltage.
2. a kind of ship power supply system according to claim 1, it is characterised in that the voltage x current controller also includes
Time delay module, the time delay module configures the first Preset Time, described to prolong when the supply current reaches the first predetermined current
When module start working and by the first predeterminated voltage substitute reference voltage, the first Preset Time reach when, the time delay module is defeated
Go out reset signal, the Voltage Drop judge module is controlled by reset signal and quits work.
3. a kind of ship power supply system according to claim 1, it is characterised in that the voltage x current controller also includes
Comparison module, the comparison module is used to compare the size of the first predetermined current and supply current, when the first predetermined current is equal to
During supply current, the comparison module output enabling signal, it is pre- by first that the voltage x current controller is controlled by enabling signal
If voltage replaces reference voltage.
4. a kind of ship power supply system according to claim 1, it is characterised in that the power manager includes frequency conversion
Device, the frequency converter includes rectifier transformer, rectification circuit and inverter circuit.
5. a kind of ship power supply system according to claim 4, it is characterised in that the power manager also includes sine
Wave filter, the sinusoidal filter is coupled between frequency converter and isolating transformer.
6. a kind of ship power supply system as claimed in claim 5, it is characterised in that the output of the power manager passes through line
Cable is connected to ship transformer.
It is 7. a kind of to suppress voltage drop control method, it is characterised in that
Step 1, there is provided a Current Voltage controller couples power manager, real-time monitoring supply current, when supply current reaches
Step 2 is entered during the first predetermined current；
Step 2, there is provided one falls judge module, adjusts supply voltage and is decreased to the first predeterminated voltage；
Step 3 a, there is provided time delay module, maintains first the first Preset Time of predeterminated voltage, and the voltage that restores electricity is to normal condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962735.1A CN106655198B (en) | 2016-10-28 | 2016-10-28 | Ship voltage drop suppression electrical system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962735.1A CN106655198B (en) | 2016-10-28 | 2016-10-28 | Ship voltage drop suppression electrical system and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106655198A true CN106655198A (en) | 2017-05-10 |
| CN106655198B CN106655198B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610962735.1A Active CN106655198B (en) | 2016-10-28 | 2016-10-28 | Ship voltage drop suppression electrical system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224768A (en) * | 2021-06-03 | 2021-08-06 | 东方日立(成都)电控设备有限公司 | Shore power supply control method and system for impact-resistant load |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007151218A (en) * | 2005-11-24 | 2007-06-14 | Nishishiba Electric Co Ltd | Marine power system |
| CN102005779A (en) * | 2010-11-17 | 2011-04-06 | 浙江运达风电股份有限公司 | Converter-based low voltage ride through control system of wind generating set |
| CN102545646A (en) * | 2012-01-18 | 2012-07-04 | 华北电力大学 | Abnormal voltage ride-through power supply of frequency converter |
| CN103887818A (en) * | 2014-03-17 | 2014-06-25 | 电子科技大学 | Low-voltage ride-through control method for grid-connected inverter |
| CN104467027A (en) * | 2014-12-08 | 2015-03-25 | 深圳市科陆变频器有限公司 | Intelligent shore power system and grid connection method |
| CN105656071A (en) * | 2016-03-11 | 2016-06-08 | 特变电工新疆新能源股份有限公司 | Flexible direct-current transmission low-voltage ride-through control method suitable for occasions without communication between double ends |
| CN206226019U (en) * | 2016-10-28 | 2017-06-06 | 上海电气富士电机电气技术有限公司 | A kind of ship Voltage Drop suppresses electrical system |
-
2016
- 2016-10-28 CN CN201610962735.1A patent/CN106655198B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007151218A (en) * | 2005-11-24 | 2007-06-14 | Nishishiba Electric Co Ltd | Marine power system |
| CN102005779A (en) * | 2010-11-17 | 2011-04-06 | 浙江运达风电股份有限公司 | Converter-based low voltage ride through control system of wind generating set |
| CN102545646A (en) * | 2012-01-18 | 2012-07-04 | 华北电力大学 | Abnormal voltage ride-through power supply of frequency converter |
| CN103887818A (en) * | 2014-03-17 | 2014-06-25 | 电子科技大学 | Low-voltage ride-through control method for grid-connected inverter |
| CN104467027A (en) * | 2014-12-08 | 2015-03-25 | 深圳市科陆变频器有限公司 | Intelligent shore power system and grid connection method |
| CN105656071A (en) * | 2016-03-11 | 2016-06-08 | 特变电工新疆新能源股份有限公司 | Flexible direct-current transmission low-voltage ride-through control method suitable for occasions without communication between double ends |
| CN206226019U (en) * | 2016-10-28 | 2017-06-06 | 上海电气富士电机电气技术有限公司 | A kind of ship Voltage Drop suppresses electrical system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224768A (en) * | 2021-06-03 | 2021-08-06 | 东方日立(成都)电控设备有限公司 | Shore power supply control method and system for impact-resistant load |
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| Publication number | Publication date |
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| CN106655198B (en) | 2023-07-28 |
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