CN102691583A - Constant speed and constant frequence double-closed-loop control system and method for small-power diesel generator - Google Patents
Constant speed and constant frequence double-closed-loop control system and method for small-power diesel generator Download PDFInfo
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- CN102691583A CN102691583A CN2011103870328A CN201110387032A CN102691583A CN 102691583 A CN102691583 A CN 102691583A CN 2011103870328 A CN2011103870328 A CN 2011103870328A CN 201110387032 A CN201110387032 A CN 201110387032A CN 102691583 A CN102691583 A CN 102691583A
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Abstract
The invention relates to a constant speed and constant frequence double-closed-loop control system and a method for a small-power diesel generator. The control system consists of a diesel engine rotation speed closed loop serving as an inner loop, and a generator set frequency closed loop serving as an outer loop, wherein the error input of the generator set frequency closed loop serves the input of the diesel engine rotation speed closed loop after being adjusted by a PID (Proportion Integration Differentiation) controller; the power output of a diesel engine is used for driving a generator set through a drive system; and the error input of the generator set frequency closed loop is a difference value between a preset frequency and the frequency measurement value of the generator set. By the system and the method, the accurate control on the rotation speed of different types of diesel engines can be realized, and the frequency fluctuation problem of the generator set can be solved.
Description
Technical field
The present invention relates to a kind of diesel generator field, particularly its control system and method.
Background technique
The diesel engine speed regulation system comes down to belong to speed control system, i.e. speed closed loop control.Along with development of auto-control technology, also increasingly high to the engine governed speed performance demands.Initial use is centrifugal mechanical governor on the motor.Centrifugal mechanical governor is as first generation speed regulator, and adjusting speed accuracy is relatively poor, is mainly used in the mini engine speed governing.Hydraulic machinery speed regulator in the mid-1970s extensive use can be described as second generation speed regulator, and adjusting function increases, and once is widely used in electric power plant with internal combustion engine speed governing and Ship Power Equipment etc.Along with the raising that the continuous increase of generating set capacity and some special electricity consumption object require power supply quality, having occurred again is the all-electronin speed regulator of core with the analog circut, can it be reduced third generation speed regulator.In recent years, the speed governing of DENG also turns to digital control from the conventional analogue technology, and having occurred is the digital electronic speed regulator of the 4th generation of core with the microprocessor.Like the R082 type of German MTU company, the PROACTI/II of U.S. WOODWARD company/I I/IV series, the MG-80 type digital electronic governor of Japanese NABCO company etc.Transfer as a new generation's electricity, digital electric is transferred has advantages such as algorithm is flexible, precision is high, antijamming capability is strong, and since 90 mid-nineties 90s, oneself promotes gradually in the engine governed speed field for it.
The diesel engine speed regulation system because of its have complicated non-linear, time lag, the time become characteristic such as uncertainty, be difficult to it is set up precise math model.PID control is as the Engineering Control method that a kind of actual production process generally adopts, have amount of calculation little, real-time, be easy to characteristics such as realizations, therefore, in the speed governing field by extensively employing.At present, both at home and abroad diesel generating set is based on all with electronic speed regulator that the PID control technique realizes, great majority still adopt Realization of Analog Circuit.Most typical two companies are U.S. Woodward company and German glycolylurea Man now.This two companies product all adopts Realization of Analog Circuit PID computing.Its concrete realization is distinguished again to some extent: adopted PHASE-LOCKED LOOP PLL TECHNIQUE on the proportional component of Woodward company, it is input as frequency quantity.Glycolylurea Man now then adopts frequency to press switch technology to convert the frequency signal of electromagnetic sensor into voltage, compares and enlarges processing again.For digital electronic governor, have only U.S. Xin Gesida company that commercially produced product is arranged both at home and abroad, its control is still adopts the common pid computing, and each parameter tuning must adjust accordingly with corollary equipment.For further improving the performance index that digital electric is transferred, still need reinforcement research at aspects such as control theory and control algorithms.
The foreign brand name of electronic governor mainly contains German glycolylurea Man, Switzerland ABB AB, German Bosch company, U.S. AMBAC company and U.S. Xin Gesida company etc. now; Home brands mainly contain Lanzhou Inst. of Electric Vehicle and wound power etc. is inspired confidence in Shanghai.
Comprehensive present Research both at home and abroad at present, realizes by diesel engine speed regulator for the control of System for Small Power Diesel Generator group power supply voltage frequency, is used to control digital pair of constant closed loop control method of System for Small Power Diesel Generator group frequency of supply and still belongs to blank.Given this; The two closed loop control methods of the System for Small Power Diesel Generator group that this patent proposes are that the diesel generating set output voltage frequency keeps constant core; The various forms of speed adjusting techniques of alternative existing System for Small Power Diesel Generator group are to solve the problem of output voltage frequency that strong inside and outside disturbance is caused fluctuation.
Summary of the invention
The purpose of this invention is to provide System for Small Power Diesel Generator constant-speed and constant-frequency double closed-loop control system and method, in order to the accurate control that solves dissimilar diesel engine speeds and the frequency fluctuation problem of generator set.
For realizing above-mentioned purpose; System schema of the present invention is: System for Small Power Diesel Generator group constant-speed and constant-frequency double closed-loop control system; This control system is by constituting as the diesel engine speed closed loop of interior ring with as the generator set frequency closed loop of outer shroud; The error input of said generator set frequency closed loop is regulated the input of back as the diesel engine speed closed loop through the PID controller, and the power output of said diesel engine is through the transmission system drives generator set; The error of said generator set frequency closed loop is input as the difference of setpoint frequency and generator set frequency measurement.
The difference of the input of said diesel engine speed closed loop and diesel engine speed measured value outputs to actuator after regulating through a self adaption rotational speed governor, and actuating mechanism controls connects Injection Pump, regulates and control the rotating speed of diesel engine through the fuel delivery of control Injection Pump.
Said diesel engine speed measured value obtains through the speed probe that is installed on the diesel engine output shaft.
Said generator set frequency measurement obtains through voltage transducer and the corresponding digital signal processing circuit that is arranged on generator output end.
Method scheme of the present invention is: diesel generator is carried out diesel engine speed closed loop control and the closed loop control of generator set frequency, and the diesel engine speed closed loop is interior ring, and generator set frequency closed loop is an outer shroud; And making the error input of generator set frequency closed loop regulate the input of back as the diesel engine speed closed loop through the PID controller, the error of said generator set frequency closed loop is input as the difference of setpoint frequency and generator set frequency measurement.
When starting with stopping process, adopt der Geschwindigkeitkreis that diesel generator is controlled at diesel engine, when proper functioning and load changing process, employing speed closed loop and frequency closed loop are controlled diesel generator.
Diesel generating set work engineering is divided into startup, proper functioning, load changing and four mode of operations of shutdown.Startup and shutdown mode of operation adopt speed closed loop that diesel engine is controlled, and under proper functioning and load changing mode of operation, adopt rotating speed and frequency closed loop that diesel engine is controlled.
According to diesel engine starting and stopping signal, directly use der Geschwindigkeitkreis to control; Set a steady-sxtate wave motion rate, characterize the fluctuation ratio of diesel engine speed, when the overshoot rate surpasses the steady-sxtate wave motion rate, be the load changing mode of operation, other situation are normal mode of operation.The judgement of these patterns realizes by controller software.
Both can implement to jointly control to diesel engine speed and generator set output voltage frequency, can implement independent control respectively again, to realize diesel generating set rotating speed or frequency stabilization.Adopt control system of the present invention, efficiently solve the generator set output voltage frequency fluctuation problem that causes because of under power transmission mode between diesel engine and the generator (like rigid connection, flexibly jointed chain) and the varying load situation.
Description of drawings
Fig. 1 is a double closed-loop control system block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
System embodiment
As shown in Figure 1; System for Small Power Diesel Generator constant-speed and constant-frequency double closed-loop control system is made up of diesel engine speed closed loop (hereinafter to be referred as speed closed loop) and two links of generator set (output voltage) frequency closed loop (hereinafter to be referred as the frequency closed loop); Speed closed loop is interior ring, and the frequency closed loop is an outer shroud.
The error of the input of speed closed loop and diesel engine speed measured value outputs to actuator after regulating through a self adaption rotational speed governor, and actuating mechanism controls connects Injection Pump, regulates and control the rotating speed of diesel engine through the fuel delivery of control Injection Pump.The output of speed closed loop connects generator set through transmission system drives, and the generating voltage frequency of generator set is the output quantity of frequency closed loop.The error input of frequency closed loop is regulated the input of back as speed closed loop through the PID controller, and the error of frequency closed loop is input as the difference of setpoint frequency and generator set frequency measurement.The diesel engine speed measured value obtains through the speed probe that is installed on the diesel engine flywheel casing.Speed closed loop is that stable being controlled at of diesel engine set working speed operation down; Rotating speed electromagnetic sensor through being installed on the flywheel casing detects tach signal; According to measuring rotating speed and the deviation of setting working speed, change the accelerator rod position by self adaption rotational speed governor control executing mechanism, regulate the fuel delivery size; Dwindle the rotating speed deviation, thereby realize the automatic adjusting of rotating speed.The generator set frequency measurement is handled the frequency that obtains this voltage signal through the corresponding digital signal processing circuit then through being arranged on the voltage measuring transformer output voltage signal of generator output end to this voltage signal.According to measuring frequency and the deviation of setting frequency of okperation, regulate the input quantity of back as speed closed loop through the PID controller.
Method embodiment
The characteristics of method of the present invention are on the basis of diesel engine speed closed loop; Increase the generating voltage frequency closed loop control of a generator; And with the frequency closed loop as outer shroud; Make the error input of generator set frequency closed loop regulate the input of back as the diesel engine speed closed loop through the PID controller, the error of said generator set frequency closed loop is input as the error of setpoint frequency and generator set frequency measurement.
Diesel generating set is made up of startup, proper functioning, load changing and four working procedure of shutdown, and startup and stopping process adopt and only adopt speed closed loop control, adopts two closed loop controls in proper functioning and load changing process.According to diesel engine starting and stopping signal, directly use der Geschwindigkeitkreis to control; Set a steady-sxtate wave motion rate, characterize the fluctuation ratio of diesel engine speed, when the overshoot rate surpasses the steady-sxtate wave motion rate, be the load changing mode of operation, other situation are normal mode of operation.SC system controller is accepted diesel engine starting and stopping signal, and detects information such as judging fluctuation ratio, so the judgement of above-mentioned pattern realizes by SC system controller software.
Claims (6)
1. System for Small Power Diesel Generator group constant-speed and constant-frequency double closed-loop control system; It is characterized in that; This control system is by constituting as the diesel engine speed closed loop of interior ring with as the generator set frequency closed loop of outer shroud; The error input of said generator set frequency closed loop is regulated the input of back as the diesel engine speed closed loop through the PID controller, and the power output of said diesel engine is through the transmission system drives generator set; The error of said generator set frequency closed loop is input as the difference of setpoint frequency and generator set frequency measurement.
2. System for Small Power Diesel Generator group constant-speed and constant-frequency double closed-loop control system according to claim 1; It is characterized in that; The difference of the input of said diesel engine speed closed loop and diesel engine speed measured value outputs to actuator after regulating through a self adaption rotational speed governor; Actuating mechanism controls connects Injection Pump, regulates and control the rotating speed of diesel engine through the fuel delivery of control Injection Pump.
3. System for Small Power Diesel Generator group constant-speed and constant-frequency double closed-loop control system according to claim 2 is characterized in that, said diesel engine speed measured value obtains through the speed probe that is installed on the diesel engine output shaft.
4. according to claim 1 or 2 or 3 described System for Small Power Diesel Generator group constant-speed and constant-frequency double closed-loop control systems; It is characterized in that said generator set frequency measurement obtains through voltage transducer and the corresponding digital signal processing circuit that is arranged on generator output end.
5. the two closed loop control methods of System for Small Power Diesel Generator group constant-speed and constant-frequency is characterized in that diesel generator is carried out diesel engine speed closed loop control and the closed loop control of generator set frequency, and the diesel engine speed closed loop is interior ring, and generator set frequency closed loop is an outer shroud; And making the error input of generator set frequency closed loop regulate the input of back as the diesel engine speed closed loop through the PID controller, the error of said generator set frequency closed loop is input as the difference of setpoint frequency and generator set frequency measurement.
6. the two closed loop control methods of System for Small Power Diesel Generator group constant-speed and constant-frequency according to claim 5; It is characterized in that; Starting and during stopping process at diesel engine; Adopt der Geschwindigkeitkreis that diesel generator is controlled, when proper functioning and load changing process, adopt speed closed loop and frequency closed loop that diesel generator is controlled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110387032.8A CN102691583B (en) | 2011-11-29 | 2011-11-29 | Constant speed and constant frequence double-closed-loop control system and method for small-power diesel generator |
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| CN201110387032.8A CN102691583B (en) | 2011-11-29 | 2011-11-29 | Constant speed and constant frequence double-closed-loop control system and method for small-power diesel generator |
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| CN102691583A true CN102691583A (en) | 2012-09-26 |
| CN102691583B CN102691583B (en) | 2015-06-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485914A (en) * | 2013-09-26 | 2014-01-01 | 南车戚墅堰机车有限公司 | Diesel-locomotive diesel engine rotation speed given signal calibration system and control method thereof |
| CN107165725A (en) * | 2017-06-20 | 2017-09-15 | 吴联凯 | A kind of control method of dynamic power for emergency management and rescue vehicle |
| CN107255051A (en) * | 2017-06-20 | 2017-10-17 | 吴联凯 | A kind of vehicle power power-generating control system and control method |
| CN109188962A (en) * | 2018-08-23 | 2019-01-11 | 惠州海卓科赛医疗有限公司 | A kind of double-closed-loop control algorithm of control system |
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
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| CN2355494Y (en) * | 1997-11-12 | 1999-12-22 | 湛江海洋大学工程学院 | Synchronous power generator with electrohydraulic control by marine engine shaft |
| CN101815628A (en) * | 2007-07-10 | 2010-08-25 | 轮廓硬化公司 | Ac electrical generation system |
| US20100264885A1 (en) * | 2009-04-21 | 2010-10-21 | Gen-Tech Llc | Power generator system |
| CN201696147U (en) * | 2010-06-08 | 2011-01-05 | 郑州金阳电气有限公司 | Electronic speed regulator for diesel generator set |
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2011
- 2011-11-29 CN CN201110387032.8A patent/CN102691583B/en not_active Expired - Fee Related
Patent Citations (5)
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| CN2355494Y (en) * | 1997-11-12 | 1999-12-22 | 湛江海洋大学工程学院 | Synchronous power generator with electrohydraulic control by marine engine shaft |
| CN101815628A (en) * | 2007-07-10 | 2010-08-25 | 轮廓硬化公司 | Ac electrical generation system |
| US20100264885A1 (en) * | 2009-04-21 | 2010-10-21 | Gen-Tech Llc | Power generator system |
| CN201696147U (en) * | 2010-06-08 | 2011-01-05 | 郑州金阳电气有限公司 | Electronic speed regulator for diesel generator set |
| CN202451288U (en) * | 2011-11-29 | 2012-09-26 | 河南科技大学 | Constant-speed constant-frequency double closed loop control system of low-power diesel generator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103485914A (en) * | 2013-09-26 | 2014-01-01 | 南车戚墅堰机车有限公司 | Diesel-locomotive diesel engine rotation speed given signal calibration system and control method thereof |
| CN107165725A (en) * | 2017-06-20 | 2017-09-15 | 吴联凯 | A kind of control method of dynamic power for emergency management and rescue vehicle |
| CN107255051A (en) * | 2017-06-20 | 2017-10-17 | 吴联凯 | A kind of vehicle power power-generating control system and control method |
| CN109188962A (en) * | 2018-08-23 | 2019-01-11 | 惠州海卓科赛医疗有限公司 | A kind of double-closed-loop control algorithm of control system |
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
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| CN102691583B (en) | 2015-06-17 |
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