CN109660181A - A kind of power limitation device and power limitation method for direct current group network system - Google Patents
A kind of power limitation device and power limitation method for direct current group network system Download PDFInfo
- Publication number
- CN109660181A CN109660181A CN201910000046.6A CN201910000046A CN109660181A CN 109660181 A CN109660181 A CN 109660181A CN 201910000046 A CN201910000046 A CN 201910000046A CN 109660181 A CN109660181 A CN 109660181A
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- China
- Prior art keywords
- bus
- frequency converter
- power limitation
- direct current
- network system
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of power limitation devices for direct current group network system, including more generating sets being pooled to by rectification unit on DC bus, further include the propulsion electric machine by promoting frequency converter to connect DC bus, is also connected with the load limiter being made of voltage sensor and frequency converter controller between propulsion frequency converter and the DC bus；A kind of power limitation device method is also disclosed, this method need to only sample DC bus-bar voltage, and compared with the algorithm for routinely using rate of load condensate, intermediate link is few, reliably, it is easy to accomplish.
Description
Technical field
The invention belongs to marine electric power propulsion fields, and in particular to a kind of power limitation device of direct current group network system, with
And power limitation method.
Background technique
Power limit is a kind of peculiar function of Electrical Propulsion Ship, for real-time monitoring and limits the big of propulsion load
Small, being allowed to remaining power station can be matched with load, avoided power station from overloading, caused electrical breakdown.
In the conventional Electrical Propulsion Ship in the form of exchanging as main distribution, frequency converter controller is promoted to open by acquisition unit
The information such as pass, rate of load condensate realize propeller power limitation using related algorithm.
It is quickly grown by the Electrical Propulsion Ship of main distribution form of direct current, in recent years, direct current has been the master of ship power distribution
The form of expression is wanted, the present invention is directed to provide power limit solution for the electric propulsion system of direct current networking, is allowed to and power station
It can be matched with load, avoid power station from overloading, cause electrical breakdown.
Summary of the invention
An object of the present invention is to provide a kind of simple, convenient and fast power for the electric propulsion system of direct current network construction form
Limits device.
The technical solution adopted by the present invention to solve the technical problems is: a kind of power limit for direct current group network system
Device further includes by promoting frequency converter connection including being pooled to more generating sets on DC bus by rectification unit
The propulsion electric machine of DC bus is also connected with by voltage sensor and frequency converter between the propulsion frequency converter and DC bus
The load limiter of controller composition.
A kind of power limitation device for direct current group network system, voltage sensor are built in propulsion frequency conversion
Device, for acquiring the voltage of DC bus and being sent into frequency converter controller.
The present invention the second purpose be to provide a kind of power limitation method for direct current group network system, be that one kind is based on
The software algorithm of above-mentioned power limitation device exploitation, step are as follows:
A) voltage of DC bus compares and calculates: the voltage of acquisition DC bus in real timeU actIt is set with DC bus-bar voltage lower limit
Definite valueU set, difference is calculated∆U；
B) frequency converter output torque amplitude limit value calculates: the difference that step a) is calculated∆UIt is calculated and pushes away through PI controller
Into frequency converter torque amplitude limitT maxValue, makes power converter output be restricted to setting value.
A kind of power limitation method for direct current group network system, the PI controller, which uses, has output limit
The PI software algorithm of width.
Main beneficial effect of the invention is: providing a kind of power limitation device and power limit for direct current group network system
Method processed, this method need to only sample DC bus-bar voltage, and compared with the algorithm for routinely using rate of load condensate, intermediate link is few, reliably,
It is easily achieved.
Detailed description of the invention
Fig. 1 is the hardware configuration of power limitation device of the present invention；
Fig. 2 is the software function diagram of power limitation method of the present invention.
Each appended drawing reference in figure: 1- generating set, 2- rectification unit, 3- DC bus, 4- load limiter, 5-
Promote frequency converter, 6-propulsion electric machines.
Specific embodiment
Below with reference to example and attached drawing, invention is further described in detail.
As shown in Figure 1, direct current group network system is generally pooled to DC bus 3 by the more rectified units 2 of generating set 1
On, direct current is the main forms of ship power distribution, and load limiter 4 is by voltage sensor and promotes frequency converter controller group
At the voltage sensor promoted built in 5 inside of frequency converter can be used in the voltage sensor, for acquiring the electricity of DC bus 3
It presses and is sent into propulsion frequency converter controller.
As shown in Fig. 2, the power limitation method includes following step:
1) DC bus-bar voltage compares and calculates
DC bus-bar voltage is acquired in real time by voltage sensorU actWith DC bus-bar voltage lower limit set valueU setIt is calculated
Difference∆U。
2) frequency converter output torque amplitude limit value calculates
The difference that step 1) is calculated∆UIt is calculated through PI controller 03 and promotes frequency converter torque amplitude limitT max.The PI
Controller 03 is the PI software algorithm with output violent change.The power limitation method is the software based on load limiter exploitation
Algorithm.
Finally it should be noted that: the above be only to the technical solution that illustrates rather than its limitations, it is any to be familiar with
Professional and technical personnel is changed or is modified as the embodiment of equivalent variations, institute possibly also with the technology contents of the disclosure above
State field it will be appreciated by the skilled person that without departing from any modification of spirit and scope of the invention or equivalent replacement, cover
In the scope of the claims of the present invention.
Claims (4)
1. a kind of power limitation device for direct current group network system, it is characterised in that: including being pooled to by rectification unit (2)
More generating sets (1) on DC bus (3) further include the propulsion electricity by promoting frequency converter (5) connection DC bus (3)
Machine (6) is also connected between the propulsion frequency converter (5) and DC bus (3) by voltage sensor and frequency converter controller
The load limiter (4) of composition.
2. a kind of power limitation device for direct current group network system according to claim 1, which is characterized in that described
Voltage sensor, which is built in, promotes frequency converter (5), for acquiring the voltage of DC bus (3) and being sent into frequency converter controller.
3. a kind of power limitation method for direct current group network system is based on power limitation device described in claim 1, special
Sign is, step are as follows:
A) voltage of DC bus (3) compares and calculates: acquiring the voltage of DC bus (3) in real timeU actWith DC bus (3) electricity
Press lower limit set valueU set, difference is calculated∆U；
B) frequency converter output torque amplitude limit value calculates: the difference that step a) is calculated∆UIt is calculated and pushes away through PI controller
Into frequency converter (5) torque amplitude limitT maxValue.
4. a kind of power limitation method for direct current group network system according to claim 3, which is characterized in that described
PI controller uses the PI software algorithm with output violent change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000046.6A CN109660181A (en) | 2019-01-01 | 2019-01-01 | A kind of power limitation device and power limitation method for direct current group network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000046.6A CN109660181A (en) | 2019-01-01 | 2019-01-01 | A kind of power limitation device and power limitation method for direct current group network system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109660181A true CN109660181A (en) | 2019-04-19 |
Family
ID=66118333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910000046.6A Pending CN109660181A (en) | 2019-01-01 | 2019-01-01 | A kind of power limitation device and power limitation method for direct current group network system |
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| CN (1) | CN109660181A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007395A (en) * | 2019-11-16 | 2020-04-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Test topology and method for comprehensive power system of multifunctional ship direct-current power station |
| CN111319747A (en) * | 2020-03-26 | 2020-06-23 | 无锡赛思亿电气科技有限公司 | Ship direct-current networking management control system based on industrial Ethernet ring and power management method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753096A (en) * | 2009-11-10 | 2010-06-23 | 中国船舶重工集团公司第七一二研究所 | Power limiter and power control method |
| CN203225572U (en) * | 2013-05-16 | 2013-10-02 | 中国船舶重工集团公司第七一二研究所 | Electric propulsion power supply system used for pleasure boat |
| CN103414422A (en) * | 2013-07-16 | 2013-11-27 | 南京师范大学 | Direct quadrature axis flux linkage control device and method thereof |
| CN106985992A (en) * | 2017-03-23 | 2017-07-28 | 山西汾西重工有限责任公司 | Ship direct current networking electric propulsion system and regulation and control method with pulse load |
| CN107416163A (en) * | 2017-03-23 | 2017-12-01 | 山西汾西重工有限责任公司 | Promote mainly side and push away standby each other ship direct current networking propulsion system and its control method |
-
2019
- 2019-01-01 CN CN201910000046.6A patent/CN109660181A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753096A (en) * | 2009-11-10 | 2010-06-23 | 中国船舶重工集团公司第七一二研究所 | Power limiter and power control method |
| CN203225572U (en) * | 2013-05-16 | 2013-10-02 | 中国船舶重工集团公司第七一二研究所 | Electric propulsion power supply system used for pleasure boat |
| CN103414422A (en) * | 2013-07-16 | 2013-11-27 | 南京师范大学 | Direct quadrature axis flux linkage control device and method thereof |
| CN106985992A (en) * | 2017-03-23 | 2017-07-28 | 山西汾西重工有限责任公司 | Ship direct current networking electric propulsion system and regulation and control method with pulse load |
| CN107416163A (en) * | 2017-03-23 | 2017-12-01 | 山西汾西重工有限责任公司 | Promote mainly side and push away standby each other ship direct current networking propulsion system and its control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007395A (en) * | 2019-11-16 | 2020-04-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Test topology and method for comprehensive power system of multifunctional ship direct-current power station |
| CN111319747A (en) * | 2020-03-26 | 2020-06-23 | 无锡赛思亿电气科技有限公司 | Ship direct-current networking management control system based on industrial Ethernet ring and power management method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190419 |