CN102522779A - Generator synchronization control system for dynamic simulation experiment - Google Patents
Generator synchronization control system for dynamic simulation experiment Download PDFInfo
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- CN102522779A CN102522779A CN2011104157906A CN201110415790A CN102522779A CN 102522779 A CN102522779 A CN 102522779A CN 2011104157906 A CN2011104157906 A CN 2011104157906A CN 201110415790 A CN201110415790 A CN 201110415790A CN 102522779 A CN102522779 A CN 102522779A
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Abstract
The invention discloses a generator synchronization control system for a dynamic simulation experiment. The generator synchronization control system is connected with a generator, a speed regulation control module, a magnet excitation control module and a parallel circuit breaker, and quasi-synchronization parallelization of the generator and a system to be paralleled is realized through a switching-on operation of the parallel circuit breaker. The generator synchronization control system comprises a voltage transformer, a meter amplifier, an A/D (analogue-to-digital) converter, a central processing unit chip and a driving circuit, which are sequentially connected. The generator synchronization control system disclosed by the invention can realize the quasi-synchronization parallelization of the generator and the system to be paralleled through a manual quasi-synchronization control mode, a semi-automatic quasi-synchronization control mode and a full-automatic quasi-synchronization control mode, can dynamically simulate manual quasi-synchronization and automatic fast synchronization, and can observe change of impulse current at different synchronous parallel times and influence of forcible synchronization on a parallel system without meeting synchronization conditions.
Description
Technical field
The present invention relates to a kind of generator synchronous control system that is used for dynamic simulation experiment.
Background technology
Dynamic analog; Be through intend the various operating conditions and the malfunction of practical power systems at valve system patrixes such as RTDS (real-timedigital simulation device) or reality; The protection that in electric power system, moves and the function and the performance of control device are examined, to guarantee to protect the test with control device reliability service at the scene.
The same period, control was an important operation of power plant's generating set in service, and along with the change of load, the platform number of generators in power systems operation also often changes, and therefore, the parallel operation of synchronous generator is an important operation of power plant.In addition, when some accident took place in system, also normal requirement dropped into operation of power networks rapidly with the stand-by generator group, and for a certain reason, the electrical network of off-the-line operation needs cooperation, and this just needs to carry out parallel operation between two electrical networks.
The paralleling method of synchronous generator can be divided into two kinds arranged side by side of quasi-synchronization paralleling and automatic self synchronizing.Under the situation of the normal operation of electric power system, generally adopt quasi-synchronization paralleling method that generating set is put into operation.The automatic self synchronizing paralleling method seldom adopts, and has only when electric power system has an accident, and in order to drop into the hydraulic generator unit rapidly, past attempts adopts the automatic self synchronizing paralleling method.Along with the digital automatic paralleling method of the progress of automatic control technology, particularly microcomputer type is achieved day by day, also available now accurate same period the method hydraulic generator unit that puts into operation fast.Therefore, this patent is mainly realized the method for quasi-synchronization paralleling.
Existing generator synchronous control system; Realize said generator and treat the also synchronization paralleling of system through the closing operation of circuit breaker arranged side by side; Implementation is single mostly; And the closing time of circuit breaker and the reaction time of circuit are not taken into account, the convenience of computational speed, anti-electromagnetic interference, reliability and use all has very big deficiency simultaneously.
Summary of the invention
The objective of the invention is to overcome the defective of prior art and a kind of generator synchronous control system that is used for dynamic simulation experiment is provided; Having multiple synchronizing mode realizes generator and treats the also synchronization paralleling of system; And the closing time of circuit breaker arranged side by side and the reaction time of circuit have been included in the process, improved accuracy and reliability.
The technical scheme that realizes above-mentioned purpose is:
A kind of generator synchronous control system that is used for dynamic simulation experiment; Connect generator, excitation control module, speed regulating control module and circuit breaker arranged side by side respectively, through the closing operation of said circuit breaker arranged side by side being realized said generator and is treated and the quasi-synchronization paralleling of system; Said generator connects said excitation control module and speed regulating control module respectively; And through said circuit breaker arranged side by side with treat and system link to each other; Said generator synchronous control system comprises voltage transformer, instrument amplifier, A/D converter and the central processing unit chip that connects successively; And the drive circuit that connects said central processing unit chip and circuit breaker arranged side by side, wherein:
Said voltage transformer is gathered generator voltage and is treated and system voltage, and after said instrument amplifier and A/D converter conversion, is transferred to said central processing unit chip successively;
Said central processing unit chip connects said excitation control module and speed regulating control module respectively; And manually or automatically through excitation control module and speed regulating control module controls generator; Regulator generator voltage; When reaching the asynchronous switch-on condition, manually or automatically send the order of closing a floodgate and give said drive circuit;
Said drive circuit is being received the said breaker closing arranged side by side of order rear drive that closes a floodgate.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment; Wherein, Said generator synchronous control system also comprises the user's display interface that connects said central processing unit chip, said central processing unit chip to the generator voltage that receives with treat and system voltage is made difference relatively, when the gained frequency difference less than preset permission frequency difference; When perhaps gained pressure reduction is less than preset permission pressure reduction; Corresponding indicator light Chang Liang on the said user's display interface of said central processing unit chip controls representes that corresponding frequency difference or pressure reduction meet the asynchronous switch-on condition, otherwise the flicker of corresponding indicator light; Said central processing unit chip calculating generator voltage with treat and the phase angle difference of system voltage, and its numerical value is presented on user's display interface in real time, and with generator voltage with treat and the system voltage waveform is plotted on user's display interface.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment; Wherein, Said generator synchronous control system also comprises the user control interface that connects said central processing unit chip; Said central processing unit chip by manual work through said user control interface manual operation; Control described speed regulating control module and excitation control module,, manually send the order of closing a floodgate through said user control interface when artificial observation when led status, phase angle difference and voltage waveform satisfy the asynchronous switch-on condition to said user's display interface.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment; Wherein, Said generator synchronous control system also comprises the user control interface that connects said central processing unit chip; Described central processing unit chip to the generator voltage that receives with treat and system voltage is made difference relatively, when the gained frequency difference greater than preset permission frequency difference, when perhaps gained pressure reduction is greater than preset permission pressure reduction; Through said excitation control module and speed regulating control module controls generator; Change generator voltage,, manually send the order of closing a floodgate through said user control interface when artificial observation when led status, phase angle difference and voltage waveform satisfy the asynchronous switch-on condition to said user's display interface.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment; Wherein, Said central processing unit chip to the generator voltage that receives with treat and system voltage is made difference relatively, when the gained frequency difference greater than preset permission frequency difference, when perhaps gained pressure reduction is greater than preset permission pressure reduction; Through said excitation control module and speed regulating control module controls generator; Come regulator generator voltage, when said central processing unit chip detected generator voltage automatically and treats that also system voltage satisfies the asynchronous switch-on condition on voltage, frequency, phase angle, a constant echizen time sent the order of closing a floodgate automatically in advance.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment, wherein, said constant echizen time is the operate time of automatics switching signal output loop and the closing time sum of circuit breaker arranged side by side.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment; Wherein, Described asynchronous switch-on condition refers to said generator voltage and treats that also the poor relatively back of system voltage work gained frequency difference is less than or equal to preset permission frequency difference, and gained pressure reduction is less than or equal to preset permission pressure reduction.
The above-mentioned generator synchronous control system that is used for dynamic simulation experiment, wherein, said treat and system refers to Infinite bus system or other dynamic simulator systems.
The invention has the beneficial effects as follows: the closing operation of the present invention through circuit breaker arranged side by side realize generator and treat and the synchronization paralleling of system to have multiple synchronizing mode, and can accomplish the synchronization paralleling with Infinite bus system or other dynamic simulator systems; In full-automatic same period control mode; The present invention carries previous preset constant echizen time and sends the order of closing a floodgate at generator and before treating that also system voltage is made the potential difference zero crossing, and the closing time of circuit breaker arranged side by side and the reaction time of circuit have been included in the process; Accuracy and reliability have been improved; Make that like this impulse current is very little, its instantaneous maximum generally is no more than 1-2 rated current doubly, meets the generator connecting in parallel with system requirement; In semi-automatic same period control mode, carry out the same period by said central processing unit chip and follow the trail of, control breaker closing arranged side by side manually, can observe the impulse current variation the different tracking times under, thereby speed and the effect of the same period are observed; In the manual control mode same period; By controlling speed regulating control module and excitation control module manually, in dynamic simulation experiment, can observe under different pressure reduction or the frequency difference and force generator connecting in parallel with system; To its with treat and the impulse current of system changes and the influence that brings.Simultaneously, under full-automatic same period control mode, after the present invention realized synchronization paralleling, the generating function got into the synchronous operation state rapidly, and transient process is short, thus treat and the disturbance of system also little.And the present invention is simple in structure, and is with low cost, has very high practicality.
Description of drawings
Fig. 1 is the structural representation that is used for the generator synchronous control system of dynamic simulation experiment of the present invention;
Fig. 2 is the control block diagram that is used for the generator synchronous control system of dynamic simulation experiment of the present invention.
Embodiment
To combine accompanying drawing that the present invention is described further below.
See also Fig. 1; The generator synchronous control system that is used for dynamic simulation experiment of the present invention; Connect generator 5, excitation control module 8, speed regulating control module 7 and circuit breaker 12 arranged side by side respectively, through the closing operation of circuit breaker 12 arranged side by side is realized that generator 5 and is treated and the quasi-synchronization paralleling of system 6; Generator 5 connects excitation control module 8 and speed regulating control module 7 respectively, and through circuit breaker 12 arranged side by side with treat and system 6 links to each other.
Said generator synchronous control system comprises voltage transformer 1, instrument amplifier 2, A/D converter 3 and the central processing unit chip 4 that connects successively; And the user's display interface 9, user control interface 10 and the drive circuit 11 that are connected respectively with central processing unit chip 4, wherein:
Voltage transformer 1 is gathered generator voltage and is treated and system voltage, and after instrument amplifier 2 and A/D converter 3 transform, is transferred to central processing unit chip 4 successively; In the present embodiment, the model that central processing unit chip 4 is selected for use is the LPC2378 of ARM7 series, and the model that instrument amplifier 2 is selected for use is INA128, and A/D converter 3 is selected the ADS7844 analog to digital converter for use;
The generator voltage of 4 pairs of receptions of central processing unit chip with treat and system voltage is made difference relatively; When the gained frequency difference less than preset permission frequency difference; When perhaps gained pressure reduction is less than preset permission pressure reduction; The indicator light flicker of corresponding frequency difference or pressure reduction representes that corresponding frequency difference or pressure reduction meet the asynchronous switch-on condition on the central processing unit chip 4 control user display interfaces 9; Central processing unit chip 4 calculating generators 5 with treat and system's 6 phase difference of voltage after, the numerical value of this phase angle difference is presented on user's display interface 9 in real time, simultaneously with generator voltage with treat and the system voltage waveform is plotted on user's display interface 9;
Central processing unit chip 4 changes the generator voltage that obtains with manually or automatic mode through excitation control module and speed regulating control module controls generator, when reaching the asynchronous switch-on condition, manually or automatically sends the order of closing a floodgate to drive circuit 11;
If circuit breaker 12 both sides voltages are respectively U side by side
GAnd U
xSide by side circuit breaker 12 main contacts closed moments the impulse current value that occurred and the transient process that gets into synchronous operation, the pulsating voltage value U when being decided by to close a floodgate
sWith the slippage angular frequency
sTherefore, quasi-synchronization paralleling mainly is to pulsating voltage U
sWith the slippage angular frequency
sDetect and control, and select the suitable time to send switching signal, make the U of the moment of closing a floodgate
sValue is in permissible value.The information that detects is taken from the voltage of circuit breaker arranged side by side both sides, and mainly is to U
sDetect and information extraction.
See also Fig. 2, at first carry out current phase angle difference δ
eCalculate, to understand pulse voltage U between current point arranged side by side
sSituation, δ
eIt is interval to be in π～2 π? Because constant echizen time t
YJBe limited to generally that phase angle difference reduces section gradually between two vectors.Therefore, if δ
eValue be between 0～π, then be phase angle difference δ
eIncrease the interval gradually, just can constant echizen time t
YJBest leading angle δ
YJCalculate.
If δ
eBe between π～2 π, will manage to catch best leading angle δ so
YJThe time send reclosing command.If | (2 π-δ
i)-δ
YJ|≤ε sets up, and then sends reclosing command.If difference, is then calculated prediction closing time difference Δ t greater than ε
eIf, greater than the interval of next calculation level, then return, treat that next calculation level recomputates.If Δ t
eBe less than or equal to next calculation level time, so just postpone Δ t
e, send reclosing command arranged side by side.
The present invention has multiple quasi-synchronization paralleling mode, as follows:
(1) manual accurate synchronizing mode: speed regulating control module 7 is controlled by operation manually with excitation control module 8, and gives drive circuit 11 by sending the order of closing a floodgate manually, controls circuit breaker 12 arranged side by side and closes a floodgate.
Under described manual accurate synchronizing mode; Central processing unit chip 4 is according to the manual operation data message that is collected by user control interface 10; Exchange speed control control module 7 respectively and carry out speedup/deceleration control; Excitation control module 8 increased to encourage/subtract encourage control,, manually dial switches down through user control interface 10 by manual work when operating personnel observe led status, phase angle difference and voltage waveform on by user's display interface 9 when satisfying the asynchronous switch-on condition; Make central processing unit chip 4 send and close a floodgate order, drive circuit breaker 12 arranged side by side and close a floodgate to drive circuit 11.
(2) semi-automatic accurate synchronizing mode: speed regulating control module 7 is directly controlled by central processing unit chip 4 with excitation control module 8; And, control circuit breaker 12 arranged side by side and close a floodgate by sending the order of closing a floodgate to drive circuit 11 through user control interface 10 manually.
Under described semi-automatic accurate synchronizing mode; The generator voltage of 4 pairs of receptions of central processing unit chip with treat and system voltage is made difference relatively; When the gained frequency difference greater than preset permission frequency difference; When perhaps gained pressure reduction was greater than preset permission pressure reduction, central processing unit chip 4 sent control command and gives excitation control module 8 and speed regulating control module 7, made each appropriate sections of excitation control module 8 and speed regulating control module 7 control generators 5; Thereby change the voltage of generator 5, to reach the condition same period.After when led status and the phase angle difference numerical value of artificial observation to user's display interface 9 satisfies the asynchronous switch-on condition; Manually dial switch down by manual work through user control interface 10; Make central processing unit chip 4 send and close a floodgate order to drive circuit 11; Drive circuit breaker 12 arranged side by side, close a floodgate.
(3) full-automatic accurate synchronizing mode: central processing unit chip 4 is through speed regulating control module 7 and excitation control module 8 control generators 5; And by central processing unit chip 4 in advance constant echizen time send the order of closing a floodgate automatically and give drive circuit 11, control circuit breaker 12 arranged side by side and close a floodgate.
Under described full-automatic accurate synchronizing mode; The generator voltage of 4 pairs of receptions of central processing unit chip with treat and system voltage is made difference relatively; When the gained frequency difference greater than preset permission frequency difference; When perhaps gained pressure reduction is greater than preset permission pressure reduction; Central processing unit chip 4 sends control command and gives excitation control module 8 and speed regulating control module 7, makes excitation control module 8 and speed regulating control module 7 control each appropriate section of generators 5, thus regulator generator voltage; When central processing unit chip 4 detect automatically said generator voltage with treat and system voltage do difference relatively after the gained frequency difference be less than or equal to preset permission frequency difference; And when gained pressure reduction is less than or equal to preset permission pressure reduction, shifts to an earlier date a constant echizen time by central processing unit chip 4 and send the order of closing a floodgate automatically, control circuit breaker 12 arranged side by side and close a floodgate to drive circuit 11.
Said constant echizen time is to confirm according to the closing time of the operate time of automatics switching signal output loop and circuit breaker arranged side by side, and given by following formula:
t
YJ＝t
c+t
QF
T in the formula
cThe operate time that refers to automatics switching signal output loop;
T
QFThe closing time that refers to circuit breaker arranged side by side.
Above-mentioned treats and system's 6 finger Infinite bus system or other dynamic simulator systems that described other dynamic simulator systems are meant the dynamic simulator system except that the residing dynamic simulator system of the control system same period of the present invention.
In sum, the present invention realizes the synchronization paralleling of generator and Infinite bus system or other dynamic simulator systems through the closing operation of circuit breaker arranged side by side, and has multiple synchronizing mode; In full-automatic same period control mode; The present invention carries previous preset constant echizen time and sends the order of closing a floodgate at generator voltage and before treating that also system voltage is made the potential difference zero crossing, and the closing time of circuit breaker arranged side by side and the reaction time of circuit have been included in the process; Accuracy and reliability have been improved; Make that like this impulse current is very little, its instantaneous maximum generally is no more than 1-2 rated current doubly, meets the generator connecting in parallel with system requirement; In semi-automatic same period control mode, carry out the same period by the central processing unit chip and follow the trail of, control breaker closing arranged side by side manually, can observe the impulse current variation the different tracking times under, can observe speed and the effect of the same period; In the manual control mode same period; By controlling speed regulating control module and excitation control module manually, in the dynamic simulation experiment, can observe under different pressure reduction and frequency difference and force generator connecting in parallel with system; To its with treat and the variation of the impulse current of system and the influence that brings.Simultaneously, under full-automatic same period control mode, after the present invention realized synchronization paralleling, the generating function got into the synchronous operation state rapidly, and transient process is short, thus treat and the disturbance of system also little.
Above embodiment only supplies to explain the present invention's usefulness; But not limitation of the present invention; The technical staff in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited each claim.
Claims (8)
1. generator synchronous control system that is used for dynamic simulation experiment; Connect generator, excitation control module, speed regulating control module and circuit breaker arranged side by side respectively, through the closing operation of said circuit breaker arranged side by side being realized said generator and is treated and the quasi-synchronization paralleling of system; Said generator connects said excitation control module and speed regulating control module respectively; And through said circuit breaker arranged side by side with treat and system link to each other; It is characterized in that; Said generator synchronous control system comprises voltage transformer, instrument amplifier, A/D converter and the central processing unit chip that connects successively, and the drive circuit that connects said central processing unit chip and circuit breaker arranged side by side, wherein:
Said voltage transformer is gathered generator voltage and is treated and system voltage, and after said instrument amplifier and A/D converter conversion, is transferred to said central processing unit chip successively;
Said central processing unit chip connects said excitation control module and speed regulating control module respectively; And manually or automatically through excitation control module and speed regulating control module controls generator; Regulator generator voltage; When reaching the asynchronous switch-on condition, manually or automatically send the order of closing a floodgate and give said drive circuit;
Said drive circuit is being received the said breaker closing arranged side by side of order rear drive that closes a floodgate.
2. the generator synchronous control system that is used for dynamic simulation experiment according to claim 1; It is characterized in that; Said generator synchronous control system also comprises the user's display interface that connects said central processing unit chip, said central processing unit chip to the generator voltage that receives with treat and system voltage is made difference relatively, when the gained frequency difference less than preset permission frequency difference; When perhaps gained pressure reduction is less than preset permission pressure reduction; Corresponding indicator light Chang Liang on the said user's display interface of said central processing unit chip controls representes that corresponding frequency difference or pressure reduction meet the asynchronous switch-on condition, otherwise the flicker of corresponding indicator light; Said central processing unit chip calculating generator voltage with treat and the phase angle difference of system voltage, and its numerical value is presented on user's display interface in real time, and with generator voltage with treat and the system voltage waveform is plotted on user's display interface.
3. the generator synchronous control system that is used for dynamic simulation experiment according to claim 2; It is characterized in that; Said generator synchronous control system also comprises the user control interface that connects said central processing unit chip; Said central processing unit chip by operating personnel through said user control interface manual operation; Control described speed regulating control module and excitation control module,, manually send the order of closing a floodgate through said user control interface when artificial observation when led status, phase angle difference and voltage waveform satisfy the asynchronous switch-on condition to said user's display interface.
4. the generator synchronous control system that is used for dynamic simulation experiment according to claim 2; It is characterized in that; Said generator synchronous control system also comprises the user control interface that connects said central processing unit chip; Described central processing unit chip to the generator voltage that receives with treat and system voltage is made difference relatively, when the gained frequency difference greater than preset permission frequency difference, when perhaps gained pressure reduction is greater than preset permission pressure reduction; Through said excitation control module and speed regulating control module controls generator; Come regulator generator voltage,, manually send the order of closing a floodgate through said user control interface when artificial observation when led status, phase angle difference and voltage waveform satisfy the asynchronous switch-on condition to said user's display interface.
5. the generator synchronous control system that is used for dynamic simulation experiment according to claim 1; It is characterized in that; Said central processing unit chip to the generator voltage that receives with treat and system voltage is made difference relatively, when the gained frequency difference greater than preset permission frequency difference, when perhaps gained pressure reduction is greater than preset permission pressure reduction; Through said excitation control module and speed regulating control module controls generator; Come regulator generator voltage, when said central processing unit chip detected generator voltage automatically and treats that also system voltage satisfies the asynchronous switch-on condition on voltage, frequency, phase angle, a constant echizen time sent the order of closing a floodgate automatically in advance.
6. the generator synchronous control system that is used for dynamic simulation experiment according to claim 5 is characterized in that, said constant echizen time is the operate time of automatics switching signal output loop and the closing time sum of circuit breaker arranged side by side.
7. the generator synchronous control system that is used for dynamic simulation experiment according to claim 5; It is characterized in that; Described asynchronous switch-on condition refers to said generator voltage and treats that also the poor relatively back of system voltage work gained frequency difference is less than or equal to preset permission frequency difference, and gained pressure reduction is less than or equal to preset permission pressure reduction.
8. according to each described generator synchronous control system that is used for dynamic simulation experiment in the claim 1 to 7, it is characterized in that said treat and system refers to Infinite bus system or other dynamic simulator systems.
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| CN106054663A (en) * | 2016-03-21 | 2016-10-26 | 南京航空航天大学 | Design method of power electronic device dynamic simulation system |
| CN107221963A (en) * | 2016-03-22 | 2017-09-29 | 通用电气公司 | Intelligent grid synchronization scenario |
| CN108847691A (en) * | 2018-08-31 | 2018-11-20 | 卧龙电气南阳防爆集团股份有限公司 | A kind of emergency service unit combination method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106054663A (en) * | 2016-03-21 | 2016-10-26 | 南京航空航天大学 | Design method of power electronic device dynamic simulation system |
| CN106054663B (en) * | 2016-03-21 | 2020-05-12 | 南京航空航天大学 | Design method of dynamic simulation system of power electronic device |
| CN107221963A (en) * | 2016-03-22 | 2017-09-29 | 通用电气公司 | Intelligent grid synchronization scenario |
| CN108847691A (en) * | 2018-08-31 | 2018-11-20 | 卧龙电气南阳防爆集团股份有限公司 | A kind of emergency service unit combination method and device |
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Inventor after: Jie Da Inventor after: Liu Gaowei Inventor after: Yu Zhiwen Inventor after: Zhang Yanchi Inventor after: Zhuang Junpeng Inventor after: Jiang Chuanwen Inventor after: Ai Qian Inventor after: He Wei Inventor after: Pan Yu Inventor before: Jie Da Inventor before: Fang Xinyu Inventor before: Yu Zhiwen Inventor before: Zhang Yanchi Inventor before: Zhuang Junpeng Inventor before: Jiang Chuanwen Inventor before: Ai Qian Inventor before: He Wei |
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Free format text: CORRECT: INVENTOR; FROM: JIE DA FANG XINYU YU ZHIWEN ZHANG YANCHI ZHUANG JUNPENG JIANG CHUANWEN AI QIAN HE WEI TO: JIE DA LIU GAOWEI YU ZHIWEN ZHANG YANCHI ZHUANG JUNPENG JIANG CHUANWEN AI QIAN HE WEI PAN YU |
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Application publication date: 20120627 |