CN102867222B - A kind of checking energy of power station and the measuring method of storehouse charge capacity and device - Google Patents
A kind of checking energy of power station and the measuring method of storehouse charge capacity and device Download PDFInfo
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Abstract
The invention discloses a kind of checking energy of power station and the measuring method of storehouse charge capacity and device, said method comprising the steps of: S1, the waterlevel data of reservoir measured by telemetry equipment, and ultrasonic flow rate measurement amount is generating flow Q day by day
day, collecting device of exerting oneself gathers daily mean and to exert oneself N
day; S2, calculation server processes to obtain mean of dekan generating flow Q to above-mentioned data
ten days, mean of dekan productive head H
ten daysand the mean of dekan is exerted oneself N
pasture; S3, calculation server utilizes water energy formula to obtain K
ten days; S4, the checking energy of the corresponding period reservoir of calculation server measuring and calculating and storehouse charge capacity.The present invention is by measuring waterlevel data, day by day the generating flow Q of reservoir in real time
day, daily mean exerts oneself N
daythese real time data Bound moisture energy formulae discovery again by gathering go out the K value in units of ten days, the K value calculated in this way is more close to actual value, and compared with solid defining K value, the accuracy calculating the checking energy and storehouse charge capacity obtaining power station improves greatly.
Description
Technical field
The present invention relates to a kind of checking energy of power station and the measuring method of storehouse charge capacity and device, belong to reservoir operation technical field.
Background technology
Energy utilization improvement rate is an important momentum indicator in power station, it not only can reflect that power station can be converted to the ability of electric energy water, and then the convenient equilibrium of supply and demand maintaining electricity, but also the actual influence that different power station scheduling means produce power station can be reflected, and then suitable Optimized Operation scheme is selected to dispatch power station.In the measuring and calculating process of energy utilization improvement rate, wherein two important factors are checking energy and the storehouse charge capacities in power station, and the accuracy of these two factors is directly connected to the accuracy of energy utilization improvement rate.
In the computation process of power station checking energy and storehouse charge capacity, relate to an important parameter-power station integrated power factor, power station integrated power factor (i.e. K value) reflects the efficiency that power station can be converted into water electric energy, and it gets a changeless value usually.Owing to have ignored the variability of power station integrated power factor in this case, finally cause the error of power station checking energy value and the storehouse electric power storage value calculated comparatively large, availability is lower; In addition, even if consider the situation of change of K value, the checking energy adopting existing measuring method to obtain and the accuracy of storehouse charge capacity still lower, be further improved.
Also there is no the relevant report about the accuracy improving checking energy and storehouse charge capacity at present.
Summary of the invention
The object of the invention is to, a kind of checking energy of power station and the measuring method of storehouse charge capacity and device are provided, it effectively can solve problems of the prior art, especially power station integrated power factor gets changeless value, cause the error calculating power station checking energy value and the storehouse electric power storage value obtained comparatively large, the problem that availability is lower.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of checking energy of power station and the measuring method of storehouse charge capacity, comprise the following steps:
S1, the waterlevel data of reservoir measured by telemetry equipment, and ultrasonic flow rate measurement amount is generating flow Q day by day
day, collecting device of exerting oneself gathers daily mean and to exert oneself N
day;
S2, calculation server processes to obtain mean of dekan generating flow Q to above-mentioned data
ten days, mean of dekan productive head H
ten daysand the mean of dekan is exerted oneself N
ten days;
S3, calculation server utilizes water energy formula N
ten days=K
ten daysq
ten daysh
ten daysobtain K
ten days;
S4, the checking energy of the corresponding period reservoir of calculation server measuring and calculating and storehouse charge capacity.
When measuring day by day generating flow, traditional method is: the first reservoir level change of statistical time range; And then calculate the change of stock's water yield, calculate water amount of power generating; Again divided by T.T. period, draw generating flow, but the method is more much bigger than adopting the error of ultrasonic flow rate measurement amount generating flow day by day in the present invention.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, also comprise:
S31, electrical energy collecting device measures the electricity by average output to K of starting in power station
ten dayscorrect, described " correction " specifically comprises: if K
ten days< K
min, then K
ten days=K
min; If K
ten days> K
max, then K
ten days=K
max, wherein,
x
maxfor the maximal value of the electricity that starts, X
minfor the minimum value of the electricity that starts, t
ten daysfor the time in ten days; By with upper type to K
ten daysafter correcting, K
ten dayscloser to actual value, and then the measuring and calculating accuracy rate of checking energy and storehouse charge capacity is improved greatly.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, the collecting device of exerting oneself described in step S1 adopts active power transmitter or ac sampling device, to be exerted oneself N by the daily mean of above-mentioned two kinds of equipment collections
daymore accurate.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, " process " described in step S2 comprising: calculation server by calculating the end of reservoir, first water-head obtains daily mean productive head H
day, to daily mean productive head H
day, generating flow Q day by day
dayand daily mean is exerted oneself N
daycarry out accumulative average.Calculate in units of ten days, the data result precision obtained is high, and only calculating K
daybe nonsensical, calculate in units of the moon, the result obtained is more coarse again, and accuracy rate is lower.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, regulate power station for more than season and season, the checking energy of the corresponding period reservoir of calculation server measuring and calculating described in step S4 specifically comprises the following steps:
Step1, be rich, Pian Feng, flat, hemiplegia and withered Pyatyi to carrying out discharge according to reservoir inflow frequency partition, wherein, rich reservoir inflow frequency≤10%, reservoir inflow frequency≤37.5% that 10%< is partially rich, reservoir inflow frequency≤62.5% that 37.5%< is flat, reservoir inflow frequency≤90% that 62.5%< is hemiplegia, withered reservoir inflow frequency >90%;
Step2, within the scope of the water level bound in scheduling graph Ge Xun firm output powcr district, by water level according to above-mentioned come the rich withered rank of discharge divide, namely divide according to the ratio shared by rich, Pian Feng, flat, hemiplegia and withered each interval;
Step3, according to carrying out the rich withered rank of discharge, determines the last water level of corresponding period, and namely this last water level carrys out the equivalent water level drop point of discharge within the scope of the percentage frequency of the withered rank of its corresponding Feng Ping;
Step4, according to determined last water level, and carrys out discharge and water level at the beginning of the period, calculates the N that exerts oneself obtaining this period according to principle of water balance
calculate, t;
Step5, gets
and will
the N that exerts oneself is examined as the period
core, t, wherein,
retain a decimal;
Step6, reads Q
enter, t, γ
core, t, K
ten days, make upper one period Mo water level be water level Z at the beginning of this period
t, get the period and to exert oneself N
core, t;
Step7, assuming that period storage outflow is Q
go out, t=Q
fd, t=Q
max;
Step8, by water balance formula Q
enter-Q
go out=(V
t+1-V
t)/Δ t calculates period Mo reservoir storage capacity V
t+1if, V
t+1> V
max, t, then V
t+1-V
max, tas abandoning the water yield, calculate Q
earial drainage, t, and Q
go out, t=Q
fd, t+ Q
earial drainage, t, make V
t+1=V
max; Wherein, Q
enterfor reservoir inflow, Q
go outfor storage outflow;
Step9, passes through V
t+1period Mo reservoir level Z is obtained with storage-capacity curve
t+1, judging whether last water level meets period Mo restriction of water level, if do not met, then recalculating N
core, t, last water level is met the demands; Wherein, described restriction of water level refers to: water level must not lower than level of dead water, must not to sluice position and normal high water level (N.H.W.L.) higher than flood simultaneously;
Step10, passes through Q
go out, tand level of tail water discharge relation curve obtains period average downstream water level Z
x,t;
Step11, calculated water head H
all, t=(Z
t+ Z
t+1)/2-Z
x,t;
Step12, passes through H
all, tand anticipation power curve obtains N
in advance, t;
Step13, by period rate of load condensate γ
core, tcalculate the period adjustable N that exerts oneself
max, t=γ
core, t× N
in advance, t;
Step14, N
core, t=min (N
t, N
max, t);
Step15: calculate generating flow
Step16: if | Q '
fd, t+q
earial drainage, t-Q
go out, t| < ξ, then record Q
fd, t, Q
go out, t, V
t+1, Z
t+1, enter subsequent period iterative computation; Otherwise, again suppose Q
go out, t, return Step7, wherein, ξ is permissible error;
Step17, in the given period after all period calculating, calculates and terminates, and exports day part end reservoir level Z
t+1with the average output N of day part
core, t;
Step18, checking energy is day part electricity sum: E
core=Σ (N
core, t× Δ t);
Wherein, Q
enter, t: period average reservoir inflow; Z
t: water level on dam at the beginning of the period; K
ten days: the period appraises and decides comprehensive power factor; V
t: storage capacity at the beginning of the period; Q
fd, t: period average generating flow; Q
earial drainage, t: the period abandons discharge; N
t: scheduling graph indicated output; N
max, t: the period is adjustable exerts oneself; N
in advance, t: period anticipation is exerted oneself; N
core, t: period examination is exerted oneself; Q
max,: be bigger than machine flow most, by calculating with upper type the checking energy that season and season more than regulate the power station corresponding period, its accuracy rate improves 65.8%.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, power station is regulated for more than season and season, according to gather year in day by day by period each unit load data, reject exerting oneself of low unit of exerting oneself, form power plant's total load process draw power plant's load process month by month day by day, calculate actual annual electricity generating capacity E
year.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, for daily regulated hydroplant, the checking energy of the corresponding period reservoir of calculation server measuring and calculating described in step S4 specifically comprises the following steps:
Step1: read average daily reservoir inflow Q
day, Z
core, K
ten daysand γ
core, average daily storage outflow equals average daily reservoir inflow;
Step2: according to level of tail water discharge relation curve, obtain average daily level of tail water Z
under=f (Q
day);
Step3: calculate per day gross head H
all=Z
core-Z
under;
Step4: make Q
fd=Q
dayif, Q
day> Q
max, Q
fd=Q
max;
Step5: calculate the per day N that exerts oneself
water=K
ten daysq
fdh
all;
Step6: look into anticipation power curve, obtains and daily envisions the N that exerts oneself
in advance=f (H
all);
Step7: by rate of load condensate γ
coretry to achieve the maximum N that daily exerts oneself
max=γ
coren
in advance;
Step8: if N
water> N
max, make N
examination=N
max; Otherwise make N
examination=N
water;
Step9: checking energy is: E
examination=N
examination× 24;
Wherein, Q
day: per day reservoir inflow; Q
fd: day generating flow; γ
core: daily load rate; Q
max: power station is bigger than machine flow most; K
ten days: appraise and decide comprehensive power factor; Z
core: appraise and decide initial water level; H
all: per day gross head; N
examination: day examination is exerted oneself; E
examination: day checking energy, by calculating the checking energy of daily regulated hydroplant corresponding period with upper type, its accuracy rate improves 60%.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, for daily regulated hydroplant, the actual operating data gathered, comprise reservoir in a few days day part first last water level, water and outbound, generating flow and abandon discharge, generated energy and generating water usage data, draw power plant's in a few days load process by above-mentioned data, calculate actual go out daily generation E
day.
In the checking energy in aforesaid power station and the measuring method of storehouse charge capacity, the storehouse charge capacity of the corresponding period reservoir of calculation server measuring and calculating described in step S4 in the following ways:
Wherein: V
actual: actual period Mo pondage; V
examination: examination period Mo pondage; γ
generating: actual average annual water consumption rate; Δ E
storehouse stores: storehouse charge capacity is poor.
Realize the checking energy in the power station of preceding method and the measuring and calculating device of storehouse charge capacity, comprise: telemetry equipment, ultrasonic flow meter, exert oneself collecting device and calculation server, telemetry equipment, ultrasonic flow meter are connected with calculation server respectively with collecting device of exerting oneself.By checking energy and the storehouse charge capacity in above equipment measuring and calculating power station, not only simple to operate, convenient realization, and also the accuracy rate of the checking energy obtained and storehouse charge capacity is high, is applicable to applying.
In the checking energy in aforesaid power station and the measuring and calculating device of storehouse charge capacity, also comprise: electrical energy collecting device, electrical energy collecting device is connected with calculation server, by the electricity by average output to K of starting utilizing electrical energy collecting device to measure power station
ten dayscorrect, described " correction " specifically comprises: if K
ten days<K
min, then K
ten days=K
min; If K
ten days>K
max, then K
ten days=K
max, wherein
x
maxfor the maximal value of the electricity that starts, X
minfor the minimum value of the electricity that starts, by with upper type to K
ten daysafter correcting, K
ten dayscloser to actual value, and then the measuring and calculating accuracy rate of checking energy and storehouse charge capacity is improved greatly.
In the checking energy in aforesaid power station and the measuring and calculating device of storehouse charge capacity, described collecting device of exerting oneself adopts active power transmitter or ac sampling device, to be exerted oneself N by the daily mean of above-mentioned two kinds of equipment collections
daymore accurate.
In the checking energy in aforesaid power station and the measuring and calculating device of storehouse charge capacity, described telemetry equipment adopts remote measurement gaging station, and equipment is simple, handled easily, and measurement accuracy is high.
In the checking energy in aforesaid power station and the measuring and calculating device of storehouse charge capacity, described remote measurement gaging station adopts the ACS300MM type remote measurement gaging station of water conservancy and hydropower branch office of Nanjing NanRui Group Co., Ltd; Described ultrasonic flow meter adopts the GER-9000 type ultrasonic flow meter of Nanjing Shenrui Electrical System Control Co., Ltd; Described active power transmitter adopts the FPWK301 type active power transmitter of Zhejiang Harnpu Power Technology Co., Ltd.; Described electrical energy collecting device adopts the EAC5000D type electrical energy collecting device of Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou.10% is further increased by the examination circuit in the power station of the device measuring of above model and the accuracy of storehouse charge capacity.
Compared with prior art, the waterlevel data of the present invention by utilizing telemetry equipment to measure reservoir, ultrasonic flow rate measurement amount is generating flow Q day by day
day, collecting device of exerting oneself gathers daily mean and to exert oneself N
daycalculation server goes out the K value in units of ten days by these real time data Bound moisture energy formulae discovery gathered, the K value calculated in this way is more close to actual value, compared with solid defining K value, the accuracy calculating power station checking energy and the storehouse charge capacity obtained improves greatly, show according to mass data statistics, the checking energy in power station adopting the method for calculating K value of the present invention to obtain and the accuracy of storehouse charge capacity improve about 65.8%.In addition, the present invention also improves the checking energy in power station and the measuring method of storehouse charge capacity, and after the measuring method in conjunction with K value, the accuracy of the checking energy that the present invention is obtained and storehouse charge capacity further increases 10%.
Accompanying drawing explanation
Fig. 1 is the workflow diagram of a kind of embodiment of the present invention;
Fig. 2 is the structural representation of a kind of embodiment of the present invention;
Fig. 3 is the Water-sodium disturbance result table of comparisons that each power station in 2009 is obtained by solid defining K value and change K value.
Reference numeral
1-telemetry equipment, 2-ultrasonic flow meter, 3-exerts oneself collecting device, 4-calculation server, 5-electrical energy collecting device.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Embodiment
Embodiment 1: a kind of checking energy of power station and the measuring method of storehouse charge capacity, as shown in Figure 1, comprise the following steps:
S1, the waterlevel data of reservoir measured by telemetry equipment, and ultrasonic flow rate measurement amount is generating flow Q day by day
day, collecting device of exerting oneself gathers daily mean and to exert oneself N
day;
S2, calculation server processes to obtain mean of dekan generating flow Q to above-mentioned data
ten days, mean of dekan productive head H
ten daysand the mean of dekan is exerted oneself N
ten days;
S3, calculation server utilizes water energy formula N
ten days=K
ten daysq
ten daysh
ten daysobtain K
ten days;
S31, electrical energy collecting device measures the electricity by average output to K of starting in power station
ten dayscorrect, described " correction " specifically comprises: if K
ten days< K
min, then K
ten days=K
min; If K
ten days> K
max, then K
ten days=K
max, wherein,
x
maxfor the maximal value of the electricity that starts, X
minfor the minimum value of the electricity that starts;
S4, the checking energy of the corresponding period reservoir of calculation server measuring and calculating and storehouse charge capacity.
Collecting device of exerting oneself described in step S1 adopts active power transmitter.
" process " described in step S2 comprising: calculation server obtains daily mean productive head H by the end of calculating reservoir, first water-head
day, to daily mean productive head H
day, generating flow Q day by day
dayand daily mean is exerted oneself N
daycarry out accumulative average.
Regulate power station for more than season and season, the checking energy of the corresponding period reservoir of calculation server measuring and calculating described in step S4 specifically comprises the following steps:
Step1, be rich, Pian Feng, flat, hemiplegia and withered Pyatyi to carrying out discharge according to reservoir inflow frequency partition, wherein, rich reservoir inflow frequency≤10%, reservoir inflow frequency≤37.5% that 10%< is partially rich, reservoir inflow frequency≤62.5% that 37.5%< is flat, reservoir inflow frequency≤90% that 62.5%< is hemiplegia, withered reservoir inflow frequency >90%;
Step2, within the scope of the water level bound in scheduling graph Ge Xun firm output powcr district, by water level according to above-mentioned come the rich withered rank of discharge divide, namely divide according to the ratio shared by rich, Pian Feng, flat, hemiplegia and withered each interval;
Step3, according to carrying out the rich withered rank of discharge, determines the last water level of corresponding period, and namely this last water level carrys out the equivalent water level drop point of discharge within the scope of the percentage frequency of the withered rank of its corresponding Feng Ping;
Step4, according to determined last water level, and carrys out discharge and water level at the beginning of the period, calculates the N that exerts oneself obtaining this period according to principle of water balance
calculate, t;
Step5, gets
and will
the N that exerts oneself is examined as the period
core, t, wherein,
retain a decimal;
Step6, reads Q
enter, t, γ
core, t, K
ten days, make upper one period Mo water level be water level Z at the beginning of this period
t, get the period and to exert oneself N
core, t;
Step7, assuming that period storage outflow is Q
go out, t=Q
fd, t=Q
max;
Step8, by water balance formula Q
enter-Q
go out=(V
t+1-V
t)/Δ t calculates period Mo reservoir storage capacity V
t+1if, V
t+1> V
max, t, then V
t+1-V
max, tas abandoning the water yield, calculate Q
earial drainage, t, and Q
go out, t=Q
fd, t+ Q
earial drainage, t, make V
t+1=V
max; Wherein, Q
enterfor reservoir inflow, Q
go outfor storage outflow;
Step9, passes through V
t+1period Mo reservoir level Z is obtained with storage-capacity curve
t+1, judging whether last water level meets period Mo restriction of water level, if do not met, then recalculating N
core, t, last water level is met the demands; Wherein, described restriction of water level refers to: water level must not lower than level of dead water, must not to sluice position and normal high water level (N.H.W.L.) higher than flood simultaneously;
Step10, passes through Q
go out, tand level of tail water discharge relation curve obtains period average downstream water level Z
x,t;
Step11, calculated water head H
all, t=(Z
t+ Z
t+1)/2-Z
x,t;
Step12, passes through H
all, tand anticipation power curve obtains N
in advance, t;
Step13, by period rate of load condensate γ
core, tcalculate the period adjustable N that exerts oneself
max, t=γ
core, t× N
in advance, t;
Step14, N
core, t=min (N
t, N
max, t);
Step15: calculate generating flow
Step16: if | Q '
fd, t+q
earial drainage, t-Q
go out, t| < ξ, then record Q
fd, t, Q
go out, t, V
t+1, Z
t+1, enter subsequent period iterative computation; Otherwise, again suppose Q
go out, t, return Step7, wherein, ξ is permissible error;
Step17, in the given period after all period calculating, calculates and terminates, and exports day part end reservoir level Z
t+1with the average output N of day part
core, t;
Step18, checking energy is day part electricity sum: E
core=Σ (N
core, t× Δ t);
Wherein, Q
enter, t: period average reservoir inflow; Z
t: water level on dam at the beginning of the period; K
ten days: the period appraises and decides comprehensive power factor; V
t: storage capacity at the beginning of the period; Q
fd, t: period average generating flow; Q
earial drainage, t: the period abandons discharge; N
t: scheduling graph indicated output; N
max, t: the period is adjustable exerts oneself; N
in advance, t: period anticipation is exerted oneself; N
core, t: period examination is exerted oneself; Q
max,: be bigger than machine flow most.
Regulate power station for more than season and season, according in the year gathered day by day by period each unit load data, reject exerting oneself of low unit of exerting oneself, form power plant's total load process draw power plant's load process month by month day by day, calculate actual annual electricity generating capacity E
year.
For daily regulated hydroplant, the checking energy of the corresponding period reservoir of calculation server measuring and calculating described in step S4 specifically comprises the following steps:
Step1: read average daily reservoir inflow Q
day, Z
core, K
ten daysand γ
core, average daily storage outflow equals average daily reservoir inflow;
Step2: according to level of tail water discharge relation curve, obtain average daily level of tail water Z
under=f (Q
day);
Step3: calculate per day gross head H
all=Z
core-Z
under;
Step4: make Q
fd=Q
dayif, Q
day> Q
max, Q
fd=Q
max;
Step5: calculate the per day N that exerts oneself
water=K
ten daysq
fdh
all;
Step6: look into anticipation power curve, obtains and daily envisions the N that exerts oneself
in advance=f (H
all);
Step7: by rate of load condensate γ
coretry to achieve the maximum N that daily exerts oneself
max=γ
coren
in advance;
Step8: if N
water> N
max, make N
examination=N
max; Otherwise make N
examination=N
water;
Step9: checking energy is: E
examination=N
examination× 24;
Wherein, Q
day: per day reservoir inflow; Q
fd: day generating flow; γ
core: daily load rate; Q
max: power station is bigger than machine flow most; K
ten days: appraise and decide comprehensive power factor; Z
core: appraise and decide initial water level; H
all: per day gross head; N
examination: day examination is exerted oneself; E
examination: day checking energy.
For daily regulated hydroplant, the actual operating data gathered, comprise reservoir in a few days day part first last water level, water and outbound, generating flow and abandon discharge, generated energy and generating water usage data, draw power plant's in a few days load process by above-mentioned data, calculate actual go out daily generation E
day.
Calculation server described in step S4 calculates the storehouse charge capacity of corresponding period reservoir in the following ways:
Wherein: V
actual: actual period Mo pondage; V
examination: examination period Mo pondage; γ
generating: actual average annual water consumption rate; Δ E
storehouse stores: storehouse charge capacity is poor.
Realize the checking energy in the power station of said method and the measuring and calculating device of storehouse charge capacity, as shown in Figure 2, comprise: telemetry equipment 1, ultrasonic flow meter 2, exert oneself collecting device 3 and calculation server 4, telemetry equipment 1, ultrasonic flow meter 2 are connected with calculation server 4 respectively with collecting device 3 of exerting oneself.Also comprise: electrical energy collecting device 5, electrical energy collecting device 5 is connected with calculation server 4.By the electricity by average output to K of starting utilizing electrical energy collecting device 5 to measure power station
ten dayscorrect.Described collecting device 3 of exerting oneself adopts active power transmitter.Described telemetry equipment 1 adopts remote measurement gaging station.Described remote measurement gaging station adopts the ACS300MM type remote measurement gaging station of water conservancy and hydropower branch office of Nanjing NanRui Group Co., Ltd; Described ultrasonic flow meter 2 adopts the GER-9000 type ultrasonic flow meter of Nanjing Shenrui Electrical System Control Co., Ltd; Described active power transmitter adopts the FPWK301 type active power transmitter of Zhejiang Harnpu Power Technology Co., Ltd.; Described electrical energy collecting device 5 adopts the EAC5000D type electrical energy collecting device of Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou.10% is further increased by the examination circuit in the power station of the device measuring of above model and the accuracy of storehouse charge capacity.
Embodiment 2: a kind of checking energy of power station and the measuring method of storehouse charge capacity, as shown in Figure 1, comprise the following steps:
S1, the waterlevel data of reservoir measured by telemetry equipment, and ultrasonic flow rate measurement amount is generating flow Q day by day
day, collecting device of exerting oneself gathers daily mean and to exert oneself N
day;
S2, calculation server processes to obtain mean of dekan generating flow Q to above-mentioned data
ten days, mean of dekan productive head H
ten daysand the mean of dekan is exerted oneself N
ten days;
S3, calculation server utilizes water energy formula N
ten days=K
ten daysq
ten daysh
ten daysobtain K
ten days;
S4, the checking energy of the corresponding period reservoir of calculation server measuring and calculating and storehouse charge capacity.
Collecting device of exerting oneself described in step S1 adopts ac sampling device.
" process " described in step S2 comprising: calculation server obtains daily mean productive head H by the end of calculating reservoir, first water-head
day, to daily mean productive head H
day, generating flow Q day by day
dayand daily mean is exerted oneself N
daycarry out accumulative average.
Regulate power station for more than season and season, the checking energy of the corresponding period reservoir of calculation server measuring and calculating described in step S4 specifically comprises the following steps:
Step1, be rich, Pian Feng, flat, hemiplegia and withered Pyatyi to carrying out discharge according to reservoir inflow frequency partition, wherein, rich reservoir inflow frequency≤10%, reservoir inflow frequency≤37.5% that 10%< is partially rich, reservoir inflow frequency≤62.5% that 37.5%< is flat, reservoir inflow frequency≤90% that 62.5%< is hemiplegia, withered reservoir inflow frequency >90%;
Step2, within the scope of the water level bound in scheduling graph Ge Xun firm output powcr district, by water level according to above-mentioned come the rich withered rank of discharge divide, namely divide according to the ratio shared by rich, Pian Feng, flat, hemiplegia and withered each interval;
Step3, according to carrying out the rich withered rank of discharge, determines the last water level of corresponding period, and namely this last water level carrys out the equivalent water level drop point of discharge within the scope of the percentage frequency of the withered rank of its corresponding Feng Ping;
Step4, according to determined last water level, and carrys out discharge and water level at the beginning of the period, calculates the N that exerts oneself obtaining this period according to principle of water balance
calculate, t;
Step5, gets
and will
the N that exerts oneself is examined as the period
core, t, wherein,
retain a decimal;
Step6, reads Q
enter, t, γ
core, t, K
ten days, make upper one period Mo water level be water level Z at the beginning of this period
t, get the period and to exert oneself N
core, t;
Step7, assuming that period storage outflow is Q
go out, t=Q
fd, t=Q
max;
Step8, by water balance formula Q
enter-Q
go out=(V
t+1-V
t)/Δ t calculates period Mo reservoir storage capacity V
t+1if, V
t+1> V
max, t, then V
t+1-V
max, tas abandoning the water yield, calculate Q
earial drainage, t, and Q
go out, t=Q
fd, t+ Q
earial drainage, t, make V
t+1=V
max; Wherein, Q
enterfor reservoir inflow, Q
go outfor storage outflow;
Step9, passes through V
t+1period Mo reservoir level Z is obtained with storage-capacity curve
t+1, judging whether last water level meets period Mo restriction of water level, if do not met, then recalculating N
core, t, last water level is met the demands; Wherein, described restriction of water level refers to: water level must not lower than level of dead water, must not to sluice position and normal high water level (N.H.W.L.) higher than flood simultaneously;
Step10, passes through Q
go out, tand level of tail water discharge relation curve obtains period average downstream water level Z
x,t;
Step11, calculated water head H
all, t=(Z
t+ Z
t+1)/2-Z
x,t;
Step12, passes through H
all, tand anticipation power curve obtains N
in advance, t;
Step13, by period rate of load condensate γ
core, tcalculate the period adjustable N that exerts oneself
max, t=γ
core, t× N
in advance, t;
Step14, N
core, t=min (N
t, N
max, t);
Step15: calculate generating flow
Step16: if | Q '
fd, t+q
earial drainage, t-Q
go out, t| < ξ, then record Q
fd, t, Q
go out, t, V
t+1, Z
t+1, enter subsequent period iterative computation; Otherwise, again suppose Q
go out, t, return Step7, wherein, ξ is permissible error;
Step17, in the given period after all period calculating, calculates and terminates, and exports day part end reservoir level Z
t+1with the average output N of day part
core, t;
Step18, checking energy is day part electricity sum: E
core=Σ (N
core, t× Δ t);
Wherein, Q
enter, t: period average reservoir inflow; Z
t: water level on dam at the beginning of the period; K
ten days: the period appraises and decides comprehensive power factor; V
t: storage capacity at the beginning of the period; Q
fd, t: period average generating flow; Q
earial drainage, t: the period abandons discharge; N
t: scheduling graph indicated output; N
max, t: the period is adjustable exerts oneself; N
in advance, t: period anticipation is exerted oneself; N
core, t: period examination is exerted oneself; Q
max,: be bigger than machine flow most.
Regulate power station for more than season and season, according in the year gathered day by day by period each unit load data, reject exerting oneself of low unit of exerting oneself, form power plant's total load process draw power plant's load process month by month day by day, calculate actual annual electricity generating capacity E
year.
For daily regulated hydroplant, the checking energy of the corresponding period reservoir of calculation server measuring and calculating described in step S4 specifically comprises the following steps:
Step1: read average daily reservoir inflow Q
day, Z
core, K
ten daysand γ
core, average daily storage outflow equals average daily reservoir inflow;
Step2: according to level of tail water discharge relation curve, obtain average daily level of tail water Z
under=f (Q
day);
Step3: calculate per day gross head H
all=Z
core-Z
under;
Step4: make Q
fd=Q
dayif, Q
day> Q
max, Q
fd=Q
max;
Step5: calculate the per day N that exerts oneself
water=K
ten daysq
fdh
all;
Step6: look into anticipation power curve, obtains and daily envisions the N that exerts oneself
in advance=f (H
all);
Step7: by rate of load condensate γ
coretry to achieve the maximum N that daily exerts oneself
max=γ
coren
in advance;
Step8: if N
water> N
max, make N
examination=N
max; Otherwise make N
examination=N
water;
Step9: checking energy is: E
examination=N
examination× 24;
Wherein, Q
day: per day reservoir inflow; Q
fd: day generating flow; γ
core: daily load rate; Q
max: power station is bigger than machine flow most; K
ten days: appraise and decide comprehensive power factor; Z
core: appraise and decide initial water level; H
all: per day gross head; N
examination: day examination is exerted oneself; E
examination: day checking energy.
For daily regulated hydroplant, the actual operating data gathered, comprise reservoir in a few days day part first last water level, water and outbound, generating flow and abandon discharge, generated energy and generating water usage data, draw power plant's in a few days load process by above-mentioned data, calculate actual go out daily generation E
day.
Calculation server described in step S4 calculates the storehouse charge capacity of corresponding period reservoir in the following ways:
Wherein: V
actual: actual period Mo pondage; V
examination: examination period Mo pondage; γ
generating: actual average annual water consumption rate; Δ E
storehouse stores: storehouse charge capacity is poor.
Realize the checking energy in the power station of said method and the measuring and calculating device of storehouse charge capacity, as shown in Figure 2, comprise: telemetry equipment 1, ultrasonic flow meter 2, exert oneself collecting device 3 and calculation server 4, telemetry equipment 1, ultrasonic flow meter 2 are connected with calculation server 4 respectively with collecting device 3 of exerting oneself.Described collecting device 3 of exerting oneself adopts ac sampling device.Described telemetry equipment 1 adopts remote measurement gaging station.
Embodiment 3: a kind of checking energy of power station and the measuring method of storehouse charge capacity, comprise the following steps:
S1, the waterlevel data of reservoir measured by telemetry equipment, and ultrasonic flow rate measurement amount is generating flow Q day by day
day, collecting device of exerting oneself gathers daily mean and to exert oneself N
day;
S2, calculation server processes to obtain mean of dekan generating flow Q to above-mentioned data
ten days, mean of dekan productive head H
ten daysand the mean of dekan is exerted oneself N
ten days;
S3, calculation server utilizes water energy formula N
ten days=K
ten daysq
ten daysh
ten daysobtain K
ten days;
S4, calculation server calculates checking energy and the storehouse charge capacity of corresponding period reservoir by conventional method.
" process " described in step S2 comprising: calculation server obtains daily mean productive head H by the end of calculating reservoir, first water-head
day, to daily mean productive head H
day, generating flow Q day by day
dayand daily mean is exerted oneself N
daycarry out accumulative average.
Realize the checking energy in the power station of said method and the measuring and calculating device of storehouse charge capacity, comprise: telemetry equipment 1, ultrasonic flow meter 2, exert oneself collecting device 3 and calculation server 4, telemetry equipment 1, ultrasonic flow meter 2 are connected with calculation server 4 respectively with collecting device 3 of exerting oneself.Described collecting device 3 of exerting oneself adopts ac sampling device.Described telemetry equipment 1 adopts remote measurement gaging station.
Adopt that the present invention crosses big vast family in 2009, comprehensive power factor K value that east wind, Suofengying and the Wujiang River are crossed carries out worrys calmly, worry is determined shown in result table 1.
Table 1
| Ten days section | Flood man is crossed | East wind | Suofengying | Wu Jiangdu |
| The first tenday period of a month in January | 8.97 | 8.92 | 8.79 | 8.40 |
| Mid-January | 8.99 | 8.80 | 8.77 | 8.61 |
| The last ten-days period in January | 8.86 | 8.72 | 8.65 | 8.58 |
| The first tenday period of a month in February | 8.79 | 9.15 | 8.60 | 8.63 |
| Mid-February | 8.54 | 8.56 | 8.44 | 8.49 |
| The last ten-days period in February | 8.29 | 8.87 | 8.43 | 7.61 |
| The first ten-day period of the March | 8.38 | 8.61 | 8.61 | 7.58 |
| Mid-March | 8.15 | 8.75 | 8.56 | 7.54 |
| The last ten-days period in March | 8.60 | 8.78 | 8.77 | 7.88 |
| The first tenday period of a month in April | 8.54 | 8.55 | 8.66 | 8.09 |
| Mid-April | 8.31 | 8.57 | 8.57 | 8.74 |
| The last ten-days period in April | 8.24 | 8.40 | 8.52 | 8.74 |
| The first tenday period of a month in May | 8.61 | 8.69 | 8.81 | 8.70 |
| Mid-April | 8.92 | 9.05 | 8.95 | 8.99 |
| The last ten-days period in May | 8.49 | 8.99 | 8.92 | 8.85 |
| The first tenday period of a month in June | 8.61 | 9.04 | 8.69 | 8.61 |
| Mid-June | 8.99 | 8.96 | 8.56 | 8.62 |
| The last ten-days period in June | 8.51 | 8.39 | 8.45 | 8.36 |
| The first tenday period of a month in July | 8.30 | 8.84 | 8.69 | 8.69 |
| Mid-July | 8.03 | 8.46 | 8.46 | 8.34 |
| The last ten-days period in July | 7.42 | 8.16 | 8.66 | 7.64 |
| Early August | 8.10 | 8.56 | 8.64 | 8.22 |
| Mid-August | 8.17 | 8.79 | 8.73 | 8.40 |
| The last ten-days period in August | 8.46 | 8.49 | 8.53 | 8.28 |
| The first tenday period of a month in September | 8.66 | 8.28 | 8.68 | 8.30 |
| Mid-September | 8.54 | 8.24 | 8.53 | 8.09 |
| The last ten-days period in September | 8.53 | 8.24 | 8.58 | 8.43 |
| The first tenday period of a month in October | 8.41 | 8.21 | 8.37 | 8.09 |
| Mid-October | 8.76 | 8.66 | 8.57 | 8.44 |
| The last ten-days period in October | 8.60 | 8.32 | 8.44 | 7.96 |
| The first tenday period of a month in November | 8.67 | 8.64 | 8.62 | 8.35 |
| Mid-November | 8.78 | 8.63 | 8.51 | 8.45 |
| The last ten-days period in November | 8.17 | 7.79 | 8.27 | 8.05 |
| The first tenday period of a month in Dec | 8.56 | 8.20 | 8.48 | 8.17 |
| Mid-December | 8.20 | 8.05 | 8.40 | 8.23 |
| The last ten-days period in Dec | 7.99 | 7.81 | 8.21 | 8.43 |
| Annual | 8.48 | 8.56 | 8.59 | 8.32 |
As can be seen from Table 1: it is 8.99 that power station power factor maximal value of each ten days is crossed by big vast family, and minimum value is 7.42, and mean value is 8.48, differs 2.16% with the comprehensive power factor 8.3 appraised and decided; Each ten days power factor maximal value and minimum value between difference 1.58, be 12.50% with mean value maximum error rate, with the comprehensive power factor maximum relative error 10.61% appraised and decided.The Dongfeng Hydroelectric Station each ten days, power factor maximal value was 9.15, and minimum value is 7.79, and mean value is 8.56, differs 2.28% with the comprehensive power factor 8.37 appraised and decided; Each ten days power factor maximal value and minimum value between difference 1.36, be 9.04% with mean value maximum error rate, with the comprehensive power factor maximum relative error 9.31% appraised and decided.Suofengyin Hydropower Station each ten days, power factor maximal value was 8.95, and minimum value is 8.21, and mean value is 8.59, equal with the comprehensive power factor 8.59 appraised and decided; Each ten days power factor maximal value and minimum value between difference 0.74, be 4.39% with mean value maximum error rate, with the comprehensive power factor maximum relative error 4.39% appraised and decided.Wujiangdu hydropower station each ten days, power factor maximal value was 8.99, and minimum value is 7.54, and mean value is 8.32, differs 0.84% with the comprehensive power factor 8.25 appraised and decided; Each ten days power factor maximal value and minimum value between difference 1.44, be 9.33% with mean value maximum error rate, with the comprehensive power factor maximum relative error 8.92% appraised and decided.
Flood man is crossed, east wind, Suofengying, the Wujiang River are crossed each ten days power factor with mean value maximum error rate all comparatively greatly, maximumly reach 12.50%, minimum also have 4.39%; All also comparatively large with the maximum relative error rate appraising and deciding comprehensive power factor at each station, maximumly reach 10.61%, minimum also have 4.39%; The comprehensive power factor of appraising and deciding at its mean value and each station has different, and maximum error rate reaches 2.28%.This shows, get fixing K value and carry out Water-sodium disturbance, its error is very large, is also very not rigorous.
Still cross with big vast family in 2009, east wind, Suofengying, the Wujiang River is crossed as example, the change K value adopting method proposed by the invention to calculate and solid defining K value carry out Water-sodium disturbance respectively, result of calculation each power station different K values Water-sodium disturbance Comparative result tables in 2009 as shown in Figure 3, as can be seen from Figure 3: in most month, the result utilizing the K value of change to calculate and the difference of real generated energy are less than the difference of result and the real generated energy utilizing fixing K value to calculate, namely the result that the result Billy utilizing the K value of change to calculate uses fixing K value to calculate is closer to actual power generation, illustrate that the K value of change considers the method for operation in power station to a certain extent, than adopting, fixing K value result of calculation is more scientific more accurate.
Claims (6)
1. the checking energy in power station and a measuring method for storehouse charge capacity, is characterized in that, comprise the following steps:
S1, the waterlevel data of reservoir measured by telemetry equipment (1), and generating flow Q day by day measured by ultrasonic flow meter (2)
day, collecting device of exerting oneself (3) gathers daily mean and to exert oneself N
day;
S2, calculation server (4) processes to obtain mean of dekan generating flow Q to above-mentioned data
ten days, mean of dekan productive head H
ten daysand the mean of dekan is exerted oneself N
ten days;
S3, calculation server (4) utilizes water energy formula to obtain K
ten days;
S31, electrical energy collecting device (5) measures the electricity to K of starting in power station
ten dayscorrect:
If K
ten days<K
min, then K
ten days=K
min;
If K
ten days>K
max, then K
ten days=K
max;
Wherein,
x
maxfor the maximal value of the electricity that starts, X
minfor the minimum value of the electricity that starts, t
ten daysfor the time in ten days;
S4, calculation server (4) calculates checking energy and the storehouse charge capacity of corresponding period reservoir; The checking energy that described calculation server (4) calculates corresponding period reservoir specifically comprises the following steps:
Step1, be rich, Pian Feng, flat, hemiplegia and withered to carrying out discharge according to reservoir inflow frequency partition, wherein, rich reservoir inflow frequency≤10%, reservoir inflow frequency≤37.5% that 10%< is partially rich, reservoir inflow frequency≤62.5% that 37.5%< is flat, reservoir inflow frequency≤90% that 62.5%< is hemiplegia, withered reservoir inflow frequency >90%;
Step2, within the scope of the water level bound in scheduling graph Ge Xun firm output powcr district, by water level according to above-mentioned come the rich withered rank of discharge divide, namely divide according to rich, Pian Feng, flat, hemiplegia and withered shared ratio;
Step3, according to carrying out the rich withered rank of discharge, determines the last water level of corresponding period, and namely this last water level carrys out the equivalent water level drop point of discharge within the scope of the percentage frequency of the withered rank of its corresponding Feng Ping;
Step4, according to determined last water level, and carrys out discharge and water level at the beginning of the period, calculates the N that exerts oneself obtaining this period according to principle of water balance
calculate, t;
Step5, gets
and will
the N that exerts oneself is examined as the period
core, t, wherein,
retain a decimal;
Step6, reads Q
enter, t, r
core, t, K
ten days, make upper one period Mo water level be water level Z at the beginning of this period
t, get the period and to exert oneself N
core, t;
Step7, assuming that period storage outflow is Q
go out, t=Q
fd, t=Q
max;
Step8, by water balance formula Q
enter-Q
go out=(V
t+1-V
t)/Δ t calculates period Mo reservoir storage capacity V
t+1if, V
t+1> V
max, t, then V
t+1-V
max, tas abandoning the water yield, calculate Q
earial drainage, t, and Q
go out, t=Q
fd, t+ Q
earial drainage, t, make V
t+1=V
max; Wherein, Q
enterfor reservoir inflow, Q
go outfor storage outflow;
Step9, passes through V
t+1period Mo reservoir level Z is obtained with storage-capacity curve
t+1, judging whether last water level meets period Mo restriction of water level, if do not met, then recalculating N
core, t, last water level is met the demands;
Step10, passes through Q
go out, tand level of tail water discharge relation curve obtains period average downstream water level Z
x,t;
Step11, calculated water head H
all, t=(Z
t+ Z
t+1)/2-Z
x,t;
Step12, passes through H
all, tand anticipation power curve obtains N
in advance, t;
Step13, by period rate of load condensate γ
core, tcalculate the period adjustable N that exerts oneself
max, t=γ
core, t× N
in advance, t;
Step14, N
core, t=min (N
t, N
max, t);
Step15: calculate generating flow
Step16: if | Q '
fd, t+ Q
earial drainage, t-Q
go out, t| < ξ, then record Q
fd, t, Q
go out, t, V
t+1, Z
t+1, enter subsequent period iterative computation; Otherwise, again suppose Q
go out, t, return Step7, wherein, ξ is permissible error;
Step17, in the given period after all period calculating, calculates and terminates, and exports day part end reservoir level Z
t+1with the average output N of day part
core, t;
Step18, checking energy is day part electricity sum: E
core=Σ (N
core, t× Δ t);
Wherein, Q
enter, t: period average reservoir inflow; Z
t: water level on dam at the beginning of the period; K
ten days: the period appraises and decides comprehensive power factor; V
t: storage capacity at the beginning of the period; Q
fd, t: period average generating flow; Q
earial drainage, t: the period abandons discharge; N
t: scheduling graph indicated output; N
max, t: the period is adjustable exerts oneself; N
in advance, t: period anticipation is exerted oneself; N
core, t: period examination is exerted oneself; Q
max: and be bigger than machine flow most.
2. the checking energy in power station according to claim 1 and the measuring method of storehouse charge capacity, it is characterized in that, for daily regulated hydroplant, the checking energy that the calculation server (4) described in step S4 calculates corresponding period reservoir specifically comprises the following steps:
Step1: read average daily reservoir inflow Q
day, Z
core, K
ten daysand r
core, average daily storage outflow equals average daily reservoir inflow;
Step2: according to level of tail water discharge relation curve, obtain average daily level of tail water Z
under=f (Q
day);
Step3: calculate per day gross head H
all=Z
core-Z
under;
Step4: make Q
fd=Q
dayif, Q
day> Q
max, Q
fd=Q
max;
Step5: calculate the per day N that exerts oneself
water=K
ten daysq
fdh
all;
Step6: look into anticipation power curve, obtains and daily envisions the N that exerts oneself
in advance=f (H
all);
Step7: by rate of load condensate γ
coretry to achieve the maximum N that daily exerts oneself
max=γ
coren
in advance;
Step8: if N
water> N
max, make N
examination=N
max; Otherwise make N
examination=N
water;
Step9: checking energy is: E
examination=N
examination× 24;
Wherein, Q
day: per day reservoir inflow; Q
fd: day generating flow; γ
core: daily load rate; Q
max: power station is bigger than machine flow most; K
ten days: appraise and decide comprehensive power factor; Z
core: appraise and decide initial water level; H
all: per day gross head; N
examination: day examination is exerted oneself; E
examination: day checking energy.
3. the checking energy in power station according to claim 1 and 2 and the measuring method of storehouse charge capacity, is characterized in that, the calculation server (4) described in step S4 calculates the storehouse charge capacity of corresponding period reservoir in the following ways:
Wherein: V
actual: actual period Mo pondage; V
examination: examination period Mo pondage; γ
generating: actual average annual water consumption rate; Δ E
storehouse stores: storehouse charge capacity is poor.
4. the checking energy in power station according to claim 1 and the measuring method of storehouse charge capacity, is characterized in that, described collecting device of exerting oneself (3) adopts active power transmitter or ac sampling device.
5. the checking energy in power station according to claim 4 and the measuring method of storehouse charge capacity, is characterized in that, described telemetry equipment (1) adopts remote measurement gaging station.
6. the checking energy in power station according to claim 5 and the measuring method of storehouse charge capacity, is characterized in that, described remote measurement gaging station adopts the ACS300MM type remote measurement gaging station of water conservancy and hydropower branch office of Nanjing NanRui Group Co., Ltd; Described ultrasonic flow meter (2) adopts the GER-9000 type ultrasonic flow meter of Nanjing Shenrui Electrical System Control Co., Ltd; Described active power transmitter adopts the FPWK301 type active power transmitter of Zhejiang Harnpu Power Technology Co., Ltd.; Described electrical energy collecting device (5) adopts the EAC5000D type electrical energy collecting device of Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou.
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