CN105958553A - Hydropower station set local control unit (LCU) active pulse adjusting system - Google Patents

Hydropower station set local control unit (LCU) active pulse adjusting system Download PDF

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CN105958553A
CN105958553A CN201610327273.6A CN201610327273A CN105958553A CN 105958553 A CN105958553 A CN 105958553A CN 201610327273 A CN201610327273 A CN 201610327273A CN 105958553 A CN105958553 A CN 105958553A
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regulation
pulse
value
power
waterhx
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CN105958553B (en
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陈辉
瞿卫华
李辉
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China Yangtze Power Co Ltd
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China Yangtze Power Co Ltd
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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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/50—Controlling the sharing of the out-of-phase component

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

A hydropower station set LCU active pulse adjusting system disclosed by the present invention comprises a module of obtaining a set active target value, a module of obtaining a power adjusting mode, a module of obtaining opening mode initial values by an interpolation algorithm, a module of obtaining an adjustment pulse width by a modified proportional algorithm and a set active monitoring module. According to the present invention, and according to the head change, the interpolation algorithm is used to calculate the opening mode initial values comprising a set active current value, an adjustment target value, an adjustment dead zone value and a pulse adjustment proportion coefficient K value, and the modified proportional algorithm is used to calculate a power pulse width. The hydropower station set LCU active power pulse adjusting system is provided for the first time, and satisfies the set active adjustment rapid stability and reliability requirements of a large-scale hydropower station monitoring system.

Description

A kind of Hydropower Plant LCU is gained merit pulse regulation system
Technical field
One Hydropower Plant LCU of the present invention is gained merit pulse regulation system, belongs to computer supervisory control system field.
Background technology
At present, the active power regulation system of the computer supervisory control system LCU for generator set regulation side to the power of the assembling unit Formula is divided into meritorious analog input pattern, meritorious analog quantity pulse mode and meritorious aperture shaping modes.The meritorious simulation of LCU for generator set The given mode tuning algorithm of amount is the most unified, all uses direct analog output mode；LCU for generator set gains merit pulse mode with meritorious Aperture shaping modes regulation algorithm is more complicated, and in use reliability cannot well be ensured.
Present invention firstly provides Hydropower Plant LCU to gain merit pulse regulation system, use interpolation algorithm to set up head, power With aperture model to solve to be caused power and aperture functional relationship uncertain problem, fortune by change of water level under aperture shaping modes Set up power by correction proportional algorithm to adjust unit is meritorious to meet large hydropower station monitoring system with pulse width function model Joint Rapid Stability and reliability requirement.
Summary of the invention
The present invention provides a kind of Hydropower Plant LCU to gain merit pulse regulation system, solves power under aperture shaping modes Caused power and aperture functional relationship uncertain problem by change of water level, establish active power and pulse width function model To meet large hydropower station monitoring system to unit meritorious regulation Rapid Stability and reliability requirement.
The above-mentioned purpose of the present invention is realized by such technical scheme: a kind of Hydropower Plant LCU is gained merit arteries and veins Reconstituting joint system, Hydropower Plant LCU gains merit pulse regulation system at power analog amount pulse regulation pattern or aperture regulation mould Under formula, interpolation algorithm and correction proportional algorithm is used quickly to regulate unit active power, including with lower module:
1. obtain unit to gain merit desired value module；
2. power adjustments mode module is obtained；
3. interpolation algorithm obtains aperture pattern initial value module；
4. revise proportional algorithm and obtain adjusting pulsewidth module；
5. unit is gained merit monitoring module；
This system by interpolation algorithm set up head, power and pulsewidth relation function to be embodied as step as follows:
1) head-peak power array is used to set up power head and unit peak power relational model；
Table 1 head-peak power array
X WATERHx[0] WATERHx[1] WATERHx[2] WATERHx[3] … WATERHx[15] WATERHx[16]
Y MaxP[0] MaxP[1] MaxP[2] MaxP[3] … MaxP[15] MaxP[16]
2) head-maximum pulse width array and calculating formula (1-1) is used to set up the power of the assembling unit and pulse width model；
Table 2 heads-maximum pulse width array
X WATERHx[0] WATERHx[1] WATERHx[2] WATERHx[3] … WATERHx[15] WATERHx[16]
Y MaxTP[0] MaxTP[1] MaxTP[2] MaxTP[3] … MaxTP[15] MaxTP[16]
3) using interpolation expressions (1-1) to calculate, the unit of current head is maximum allowable exerts oneself and maximum allowable aperture arteries and veins Wide；
Y = Y i + Y i + 1 - Y i X i + 1 - X i × ( X - X i ) - - - ( 1 - 1 )
This system by revise proportional algorithm obtain adjusting pulsewidth module to be embodied as step as follows:
1) obtain unit gain merit currency, regulation desired value, regulation dead band value DEADB；
2) obtain unit meritorious regulation desired value according to computing formula (2-1) and send out value absolute difference Diff with real, if Desired value and currency difference are more than maximum allowable regulated value MAXDEV, and the most maximum allowable regulated value is as current meritorious regulation mesh Scale value, its computing formula is (2-2)；Determine whether that being adjusted pulse calculates, if this difference is more than regulation dead band value, Then start regulation pulse to calculate；
| REVF-I |=Diff > DEADB (2-1)
If Diff > MAXDEV then Diff=MAXDEV (2-2)
Wherein REVF is expressed as desired value, and I is current real value, and Diff is the difference of current target value and currency difference Absolute value；DEADB is regulation dead band value；
3) pulse regulation width and twice arteries and veins are calculated respectively by correction proportional algorithm formula (2-3), (2-4) and (2-5) Reconstitute septa intersegmental time, pulse regulation output blocking time；
T o n = ( | D i f f | 100 × K + T g a p + T p m i n ) × 1000 ( m s ) - - - ( 2 - 3 )
TPause=(Ton × Tpac+Tap min) × 1000 (ms) (2-4)
Tlock=(Ton+Tpause) (ms) (2-5)
Wherein: Ton is pulse regulation width, TPauseIt is twice pulse regulation interval time, TlockExport for pulse regulation Blocking time, K is pulse regulation proportionality coefficient, and Tgap is pulse regulation corrected parameter, and Tp min is minimum pulse, Tpac For pulse regulation space ratio coefficient, Tap min is pulse regulation minimum time interval.
4) desired value is gained merit and real value bias direction of gaining merit according to current unit, it is judged that power adjustments direction, if currently Meritorious real value of sending out has work value more than target, then regard as power adjustments opposite direction, if current meritorious real value of sending out is gained merit less than target Value, then regard as regulating positive direction；
5) according to current power regulation direction and the deviation in last power adjustments direction, it is judged that current power regulation direction Whether have commutation, if current power regulation direction and last power adjustments direction is inconsistent or is commutating in regulation direction and Do not commutate and terminate, then assert that there is commutation in current power regulation direction；
6) calculate reality according to power adjustments direction and regulation pulse width to increase, subtract pulse width: when anti-for power adjustments Direction and without commutation time, then current power is adjusted to subtract pulse；When for power adjustments positive direction and without commutation time, then current power It is adjusted to increase pulse；
7) time interval between twice power adjustments is determined by pulse regulation interval time, between every twice power adjustments Blocking time locking is exported by pulse regulation..
8) current unit gains merit desired value and a value absolute difference in fact of gaining merit not in dead zone range, then turns and jumps to step 2) calculate from new；If the meritorious real value of sending out of unit is in desired value dead zone range, then power adjustments terminates.
Described interpolation algorithm acquisition aperture pattern initial value improves LCU for generator set and is suitable for when aperture shaping modes various Change of water level ability, solves and is caused power and aperture functional relationship uncertain problem by change of water level.
Described correction proportional algorithm meets large hydropower station monitoring system to unit meritorious regulation Rapid Stability and can By property requirement.
The method have the advantages that:
1, solve change of water level and cause power and aperture functional relationship uncertain problem.
2, improve the suitability under different heads of the LCU for generator set power adjustments.
3, the LCU for generator set of present invention pulse regulation system of gaining merit is under output pulses shaping modes or aperture shaping modes, By revising proportional algorithm, calculate regulation pulse increment, meet the regulation meritorious to unit of large hydropower station monitoring system fast Speed stability and reliability requirement.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is that present system function forms structure chart；
Fig. 2 is that present system correction proportional algorithm obtains adjusting pulsewidth block flow diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the present invention are described further.
A kind of Hydropower Plant LCU is gained merit pulse regulation system, and Hydropower Plant LCU gains merit pulse regulation system at power Under analog quantity pulse regulation pattern or aperture shaping modes, use interpolation algorithm and correction proportional algorithm quickly to regulate unit and gain merit Power, including with lower module, as shown in Figure 1.
1. unit active power desired value module is obtained: its function, mainly by computer supervisory control system platform, is used Three kinds of modes such as operator's setting, power plant AGC, automatic startup-shutdown initial value setting obtain unit active power desired value.
2. power adjustments mode module is obtained: its function is mainly by computer supervisory control system platform, at set grid-connection Time automatically set power of the assembling unit shaping modes be meritorious given way pattern, meritorious pulse regulation pattern or aperture regulation mould Formula；Aperture shaping modes is automatically engaged under Feedback of Power failure condition.
3. interpolation algorithm obtains aperture pattern initial value module: its major function is under aperture shaping modes, and it is poor to use Value-based algorithm sets up head-peak power function and head-maximum impulse function respectively, meritorious to obtain the unit under aperture pattern Currency, regulation desired value, regulation dead band value and pulse regulation Proportional coefficient K value.
4. revise proportional algorithm and obtain adjusting pulsewidth module: its function is that fortune correction proportional algorithm calculates pulse regulation in real time Width, pulse regulation interval time and pulse regulation output blocking time, and according to certain regulation barring condition and regulation direction Implement pulse regulation output.
5. unit is gained merit monitoring module: mainly for monitoring whether the regulation of native system power target value reaches set value of the power Regulation regulation dead band, when actual measurement has work value and setting value deviation to exceed power adjustments dead band value, and the persistent period was more than 10 minutes, Then report to the police " unit is meritorious to be regulated unsuccessfully ", use timing program involution unit to gain merit simultaneously and regulate unsuccessfully.
It is as follows that this system is embodied as step by difference arithmetic acquisition aperture pattern initial value:
1) head-peak power array is used to set up power head and unit peak power relational model；
Table 1 head-peak power array
X WATERHx[0] WATERHx[1] WATERHx[2] WATERHx[3] … WATERHx[15] WATERHx[16]
Y MaxP[0] MaxP[1] MaxP[2] MaxP[3] … MaxP[15] MaxP[16]
2) head-maximum pulse width array and calculating formula (1-1) is used to set up the power of the assembling unit and pulse width model；
Table 2 heads-maximum pulse width array
X WATERHx[0] WATERHx[1] WATERHx[2] WATERHx[3] … WATERHx[15] WATERHx[16]
Y MaxTP[0] MaxTP[1] MaxTP[2] MaxTP[3] … MaxTP[15] MaxTP[16]
3) using interpolation expressions (1-1) to calculate, the unit of current head is maximum allowable exerts oneself and maximum allowable aperture arteries and veins Wide；
Y = Y i + Y i + 1 - Y i X i + 1 - X i × ( X - X i ) - - - ( 1 - 1 )
This system by revise proportional algorithm obtain adjusting pulsewidth module to be embodied as step as follows:
1) obtain unit gain merit currency, regulation desired value, regulation dead band value DEADB；
2) obtain unit meritorious regulation desired value according to computing formula (2-1) and send out value absolute difference Diff with real, if Desired value and currency difference are more than maximum allowable regulated value MAXDEV, and the most maximum allowable regulated value is as current meritorious regulation mesh Scale value, its computing formula is (2-2)；Determine whether that being adjusted pulse calculates, if this difference is more than regulation dead band value, Then start regulation pulse to calculate；
| REVF-I |=Diff > DEADB (2-1)
If Diff > MAXDEV then Diff=MAXDEV (2-2)
Wherein REVF is expressed as desired value, and I is current real value, and Diff is the difference of current target value and currency difference Absolute value；DEADB is regulation dead band value；
3) pulse regulation width and twice arteries and veins are calculated respectively by correction proportional algorithm formula (2-3), (2-4) and (2-5) Reconstitute septa intersegmental time, pulse regulation output blocking time；
T o n = ( | D i f f | 100 × K + T g a p + T p m i n ) × 1000 ( m s ) - - - ( 2 - 3 )
TPause=(Ton × Tpac+Tap min) × 1000 (ms) (2-4)
Tlock=(Ton+Tpause) (ms) (2-5)
Wherein: Ton is pulse regulation width, TPauseIt is twice pulse regulation interval time, TlockExport for pulse regulation Blocking time, K is pulse regulation proportionality coefficient, and Tgap is pulse regulation corrected parameter, and Tp min is minimum pulse, Tpac For pulse regulation space ratio coefficient, Tap min is pulse regulation minimum time interval.
4) desired value is gained merit and real value bias direction of gaining merit according to current unit, it is judged that power adjustments direction, if currently Meritorious real value of sending out has work value more than target, then regard as power adjustments opposite direction, if current meritorious real value of sending out is gained merit less than target Value, then regard as regulating positive direction；
5) according to current power regulation direction and the deviation in last power adjustments direction, it is judged that current power regulation direction Whether have commutation, if current power regulation direction and last power adjustments direction is inconsistent or is commutating in regulation direction and Do not commutate and terminate, then assert that there is commutation in current power regulation direction；
6) calculate reality according to power adjustments direction and regulation pulse width to increase, subtract pulse width: when anti-for power adjustments Direction and without commutation time, then current power is adjusted to subtract pulse；When for power adjustments positive direction and without commutation time, then current power It is adjusted to increase pulse；
7) time interval between twice power adjustments is determined by pulse regulation interval time, between every twice power adjustments Blocking time locking is exported by pulse regulation.
8) current unit gains merit desired value and a value absolute difference in fact of gaining merit not in dead zone range, then turns and jumps to step 2) calculate from new；If the meritorious real value of sending out of unit is in desired value dead zone range, then power adjustments terminates.

Claims (3)

1. Hydropower Plant LCU is gained merit pulse regulation system, it is characterised in that Hydropower Plant LCU is gained merit pulse regulation System, under power analog amount pulse regulation pattern or aperture shaping modes, is used interpolation algorithm and revises the fast velocity modulation of proportional algorithm Joint unit active power, including with lower module:
1. obtain unit to gain merit desired value module；
2. power adjustments mode module is obtained；
3. interpolation algorithm obtains aperture pattern initial value module；
4. revise proportional algorithm and obtain adjusting pulsewidth module；
5. unit is gained merit monitoring module；
This system by revise proportional algorithm obtain adjusting pulsewidth module to be embodied as step as follows:
1) obtain unit gain merit currency, regulation desired value and regulation dead band value DEADB；
2) desired value is gained merit and real value absolute difference Diff of currently gaining merit according to computing formula (2-1) acquisition unit, if Meritorious desired value and current meritorious real value absolute difference of sending out are more than maximum allowable regulated value MAXDEV, then by maximum allowable regulation MAXDEV is as current Reactive-power control desired value for value, and its computing formula is (2-2)；Determine whether to be adjusted pulsimeter Calculate, if this difference is more than regulation dead band value, then starts regulation pulse and calculate；
| REVF-I |=Diff > DEADB (2-1)
If Diff > MAXDEV then Diff=MAXDEV (2-2)
Wherein REVF is expressed as meritorious desired value, and I is a current meritorious value in fact, and Diff is desired value 1 and current real value difference value Absolute value；DEADB is regulation dead band value；
3) calculate pulse regulation width respectively by correction proportional algorithm formula (2-3), (2-4) and (2-5) and two subpulses are adjusted The septa intersegmental time, pulse regulation output blocking time；
T o n = ( | D i f f | 100 × K + T g a p + T p m i n ) × 1000 ( m s ) - - - ( 2 - 3 )
TPause=(Ton × Tpac+Tapmin) × 1000 (ms) (2-4)
Tlock=(Ton+Tpause) (ms) (2-5)
Wherein: Ton is pulse regulation width, TPauseIt is twice pulse regulation interval time, TlockLocking is exported for pulse regulation Time, K is pulse regulation proportionality coefficient, and Tgap is pulse regulation corrected parameter, and Tpmin is minimum pulse, and Tpac is arteries and veins Reconstituting septa intersegmental proportionality coefficient, Tapmin is pulse regulation minimum time interval；
4) desired value is gained merit and real value bias direction of gaining merit according to current unit, it is judged that power adjustments direction, if currently gaining merit Real value of sending out has work value more than target, then regard as power adjustments opposite direction, if current meritorious real value of sending out has work value, then less than target Regard as regulating positive direction；
5) according to current power regulation direction and the deviation in last power adjustments direction, it is judged that whether current power regulation direction There is commutation, if current power regulation direction is inconsistent with last power adjustments direction or is commutating and do not having in regulation direction Commutation terminates, then assert that there is commutation in current power regulation direction；
6) calculate reality according to power adjustments direction and regulation pulse width to increase, subtract pulse width: when for power adjustments opposite direction And during without commutation, then current power is adjusted to subtract pulse；When for power adjustments positive direction and without commutation time, then current power regulation For increasing pulse；
7) time interval between twice power adjustments is determined by pulse regulation interval time, between every twice power adjustments by Pulse regulation output blocking time locking；
8) current unit gain merit desired value with meritorious real value absolute difference of sending out not in dead zone range, then turn and jump to step 2) heavy New calculating；If the meritorious real value of sending out of unit is in desired value dead zone range, then power adjustments terminates.
The most according to claim 1, a kind of Hydropower Plant LCU is gained merit pulse regulation system, it is characterised in that described difference It is as follows that algorithm acquisition aperture pattern initial value is embodied as step:
1) head-peak power array is used to set up power head and unit peak power relational model；
Table 1 head-peak power array
X WATERHx[0] WATERHx[1] WATERHx[2] WATERHx[3] … WATERHx[15] WATERHx[16] Y MaxP[0] MaxP[1] MaxP[2] MaxP[3] … MaxP[15] MaxP[16]
2) head-maximum pulse width array and calculating formula (1-1) is used to set up the power of the assembling unit and pulse width model；
Table 2 heads-maximum pulse width array
X WATERHx[0] WATERHx[1] WATERHx[2] WATERHx[3] … WATERHx[15] WATERHx[16] Y MaxTP[0] MaxTP[1] MaxTP[2] MaxTP[3] … MaxTP[15] MaxTP[16]
3) using interpolation expressions (1-1) to calculate, the unit of current head is maximum allowable exerts oneself and maximum allowable aperture pulsewidth；
Y = Y i + Y i + 1 - Y i X i + 1 - X i × ( X - X i ) - - - ( 1 - 1 )
A kind of Hydropower Plant LCU the most according to claim 1 or claim 2 is gained merit pulse regulation system, it is characterised in that described insert Value-based algorithm and correction proportional algorithm improve Hydropower Plant and gain merit pulse regulation system in meritorious pulse regulation pattern or aperture Ageing and the reliability of the power adjustments under shaping modes.
CN201610327273.6A 2016-05-17 2016-05-17 A kind of active pulse regulation systems of Hydropower Plant LCU Active CN105958553B (en)

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Cited By (6)

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CN107939590A (en) * 2017-12-04 2018-04-20 重庆新世杰电气股份有限公司 A kind of control method by water level power generation
CN108649619A (en) * 2018-05-30 2018-10-12 中国大唐集团科学技术研究院有限公司西北分公司 Hydroelectric units primary frequency modulation and active adjusting locking control method
CN111953247A (en) * 2020-06-05 2020-11-17 国网电力科学研究院有限公司 Method and device for fine adjustment and control of power of hydroelectric generating set
CN112343763A (en) * 2020-10-16 2021-02-09 四川华能宝兴河水电有限责任公司 Method and system for adjusting power pulse of approach type hydropower station
CN112383254A (en) * 2020-12-07 2021-02-19 中国长江电力股份有限公司 Guide vane opening degree analog quantity segmentation open-loop control method and system
CN114172215A (en) * 2021-12-21 2022-03-11 华能澜沧江水电股份有限公司 Power station power adjusting method and device and storage medium

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107939590A (en) * 2017-12-04 2018-04-20 重庆新世杰电气股份有限公司 A kind of control method by water level power generation
CN107939590B (en) * 2017-12-04 2021-02-05 重庆新世杰电气股份有限公司 Control method for generating power according to water level
CN108649619A (en) * 2018-05-30 2018-10-12 中国大唐集团科学技术研究院有限公司西北分公司 Hydroelectric units primary frequency modulation and active adjusting locking control method
CN108649619B (en) * 2018-05-30 2021-10-15 中国大唐集团科学技术研究院有限公司西北分公司 Primary frequency modulation and active power regulation locking control method for hydroelectric generating set
CN111953247A (en) * 2020-06-05 2020-11-17 国网电力科学研究院有限公司 Method and device for fine adjustment and control of power of hydroelectric generating set
CN112343763A (en) * 2020-10-16 2021-02-09 四川华能宝兴河水电有限责任公司 Method and system for adjusting power pulse of approach type hydropower station
CN112383254A (en) * 2020-12-07 2021-02-19 中国长江电力股份有限公司 Guide vane opening degree analog quantity segmentation open-loop control method and system
CN114172215A (en) * 2021-12-21 2022-03-11 华能澜沧江水电股份有限公司 Power station power adjusting method and device and storage medium

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