CN201601463U - Power limiter - Google Patents
Power limiter Download PDFInfo
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- CN201601463U CN201601463U CN2009202296902U CN200920229690U CN201601463U CN 201601463 U CN201601463 U CN 201601463U CN 2009202296902 U CN2009202296902 U CN 2009202296902U CN 200920229690 U CN200920229690 U CN 200920229690U CN 201601463 U CN201601463 U CN 201601463U
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- transducer
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Abstract
The utility model relates to a power limiter which belongs to the technical field of electric propulsion and comprises a power transducer and a power limit control system; the power transducer is a converting module which converts the voltage and current signals of a power generator set into active power signals; the power limit control system comprises a CPU calculating, analyzing and processing system and an online programming communication interface used for online programming and parameter setting; the CPU calculating, analyzing and processing system (2.1) is an embedded structure used for freely realizing connection with the transducer control system. The power limiter has high intellectualization, can be freely embedded into the propulsion frequency converter control system, and has the advantages of convenient operation, low failure rate, etc.
Description
Technical field
The utility model relates to a kind of load limiter, belong to electric propulsion control technology neck city, be used for the size that monitoring in real time and restriction advance load, make it to be complementary with load with the power station, avoid power station unit overload trip to cause electrical breakdown, be specially adapted to the marine vessel power propulsion control system.
Background technology
In electric propulsion control system, particularly marine vessel power propulsion control system, gather the power and the main switch state of all units of Ship Power Station in real time, behind power transducer, send into the propelling frequency converter, according to the state of unit load rate and main switch propeller power is carried out real-time amplitude limit control at the frequency converter end, avoid the unit overload trip to cause electrical breakdown, this problem is to wish the problem that solves for a long time.Major company such as ABB, SIEMENS all launches research at this problem, attempts to develop the control system of oneself, still, to so far, technical scheme and successfully application preferably also do not occur.
Summary of the invention
The purpose of this utility model is; wish the problem that solves for solving prior art; a kind of load limiter and Poewr control method are provided; this limiter comprises that multiple functions such as protection, measurement, control, monitoring are in one; gather the power related data of all units of Ship Power Station in real time; then propeller power is carried out real-time amplitude limit control, make it to be complementary with load, cause electrical breakdown to avoid power station unit overload trip with the power station.
The utility model load limiter technical scheme is: it comprises a power transducer and power limiting control system; Described power transducer is for being converted into generating set voltage, current signal the modular converter of active power signal; Described power limiting control system comprises the CPU computation and analysis processing system and is used for online programming and the online programming communication interface of parameter is set; Described CPU computation and analysis processing system is a damascene structures, is used for freely realizing and advances being connected of Frequency Converter Control system.
On above-mentioned technical solutions of the utility model basis, have the supplementary technology content, further technical scheme is respectively:
Described load limiter, its power transducer comprise the current transformer and the voltage transformer of the active power that is used to detect every generating set.
Described load limiter, its online programming communication interface is the RS232 interface.
The technique effect of load limiter of the present utility model is: can be integrated in the propelling frequency converter, monitor and limit the size that advances load in real time, make it can be complementary with load with the power station, avoid power station unit overload trip to cause electrical breakdown.The utlity model has highly intelligently, can freely add and advance in the Frequency Converter Control system, be convenient to operate realization, advantage such as failure rate is low.
Description of drawings
Fig. 1 is the member block diagram of the utility model load limiter.
Embodiment
Be described further as follows to the utility model load limiter in conjunction with the accompanying drawings and embodiments:
As shown in Figure 1, a kind of load limiter, it has a power transducer 1 and power limiting control system 2; Described power transducer 1 is for being converted into generating set voltage, current signal the modular converter of active power signal; Described power limiting control system 2 comprises CPU computation and analysis processing system 2.1 and is used for online programming and the online programming communication interface 2.2 of parameter is set; Described CPU computation and analysis processing system 2.1 is a damascene structures, is used for freely realizing and advances being connected of Frequency Converter Control system.Described power transducer 1 is useful on the current transformer and the voltage transformer of the active power that detects every generating set; The signal of handling in the output signal of power transducer 1 and the power limiting control system 2 is 4～20mA current signal, perhaps be equal to or less than+the 10V voltage signal, the signal that present embodiment is handled is elected 15mA as, also can elect 4mA or 20mA as, can also elect as to equal+10V or less than+10V.Also have the signal of handling in the output signal of embodiment power transducer 1 and the power limiting control system 2 elect as 8～15mA or+1V～+ the 5V voltage signal.Described online programming communication interface 2.2 is the RS232 interface.Described power limiting control system 2 action response time scopes are 20～300ms, and present embodiment is elected 100ms as.Described CPU computation and analysis processing system 2.1 its control unit load powers that are used to guarantee that the overload trip incident do not take place unit are equal to or less than 95% of rated power, and present embodiment is elected 90% of rated power as.
Technical solutions of the utility model, principle, effect remake be described as follows;
The utility model load limiter adopts suitable current transformer and the voltage transformer of power transducer configuration, after the active power of every generating set carried out conversion, transfer to standard 4～20mA (or equal less than+10V) signal is handled, input as the CPU computation and analysis processing system, and be incorporated in the controller of frequency converter, pass through numeric ratio, the CPU computation and analysis processing system is chosen the actual final value of feedback of maximum active power value conduct that consumes of unit automatically and is incorporated in the process modulator; Obtain the amplitude limit value signal of If, Iq after analyzing as calculated, and act on If, the Iq adjuster of frequency converter, make power converter output be limited to set point, thereby restriction propulsion system power no longer increases.For example: CPU computation and analysis processing system restriction propulsion system power no longer increases when unit load reaches 90%, guarantees that the overload trip incident does not take place unit.And the main switch state variation of unit carried out Intelligent Recognition, the performance number of unit distinguishes that it is normal off-the-line process separating brake or fault trip during according to the main switch state variation.If fault trip then can reduce the power output of frequency converter immediately, can not transship because of certain (or several) unit fault trip to guarantee other units.
Claims (3)
1. a load limiter is characterized in that, it comprises a power transducer (1) and power limiting control system (2); Described power transducer (1) is for being converted into generating set voltage, current signal the modular converter of active power signal; Described power limiting control system (2) comprises CPU computation and analysis processing system (2.1) and is used for online programming and the online programming communication interface (2.2) of parameter is set; Described CPU computation and analysis processing system (2.1) is a damascene structures, is used for freely realizing and advances being connected of Frequency Converter Control system.
2. load limiter as claimed in claim 1 is characterized in that, described power transducer (1) comprises the current transformer and the voltage transformer of the active power that is used to detect every generating set.
3. load limiter as claimed in claim 1 is characterized in that, described online programming communication interface (2.2) is the RS232 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202296902U CN201601463U (en) | 2009-11-10 | 2009-11-10 | Power limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202296902U CN201601463U (en) | 2009-11-10 | 2009-11-10 | Power limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201601463U true CN201601463U (en) | 2010-10-06 |
Family
ID=42812523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202296902U Expired - Lifetime CN201601463U (en) | 2009-11-10 | 2009-11-10 | Power limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201601463U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753096B (en) * | 2009-11-10 | 2012-11-14 | 中国船舶重工集团公司第七一二研究所 | Power limiter and power control method |
| CN109327179A (en) * | 2017-07-31 | 2019-02-12 | 株洲中车时代电气股份有限公司 | A kind of transducer power control method and frequency changer controller |
-
2009
- 2009-11-10 CN CN2009202296902U patent/CN201601463U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101753096B (en) * | 2009-11-10 | 2012-11-14 | 中国船舶重工集团公司第七一二研究所 | Power limiter and power control method |
| CN109327179A (en) * | 2017-07-31 | 2019-02-12 | 株洲中车时代电气股份有限公司 | A kind of transducer power control method and frequency changer controller |
| CN109327179B (en) * | 2017-07-31 | 2020-09-22 | 株洲中车时代电气股份有限公司 | Frequency converter power control method and frequency converter control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| CX01 | Expiry of patent term |