CN105513469B - A kind of method of simulation 35kV circuit stoichiometric point hitch relations - Google Patents
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Abstract
The invention discloses a kind of method of simulation 35kV circuit stoichiometric point hitch relations, comprise the following steps that：1. build physical device simulation system；2. hitch relation is calculated based on simulation system：2 1. set load, loadtype and the instantaneous power of two feeder line metering users；2 2.PC machines calculate public change summary table instantaneous power according to low-voltage customer instantaneous power and line loss per unit；Voltage, electric current and the phase that 2 3.PC machines control public affairs become after analog power output calculating corresponding to summary table, it is applied to public change summary table；2 4. become user's instantaneous power calculating 10kV Source of Gateway Meter instantaneous power and power factor according to massive quantity power supply and measurement, height for low meter and public affairs；Voltage, electric current and phase after analog power output calculating corresponding to 2 5.PC machines control 10kV feeder line Source of Gateway Meter, are applied to 10kV feeder line Source of Gateway Meter；2 6. calculate the instantaneous power and power factor of 35kV summary tables according to two 10kV feeder line Source of Gateway Meter instantaneous powers；Voltage, electric current and phase after analog power output calculating corresponding to 2 7.PC control 35kV summary tables, are applied to 35kV summary tables.
Description
Technical field
The invention belongs to measurement meter simulation training field in power system, and in particular to one kind simulation 35kV circuit meterings
The method of point hitch relation.
Background technology
With the construction of intelligent grid, modern power network is increasingly complicated, is intelligent, and national economic development is got over to electrical energy demands
To come bigger, the correctness of various metering users metering electric energy is particularly important, and in the actual operation of power system, because respectively
The presence of kind complicated factor, it can all cause metering and electricity charge charge mistake, such as：Measurement meter failure, metering line failure, electric current
Transformer selection mismatches, electricity stealing of Electricity customers etc..Unknown economic loss will be brought to country or Electricity customers,
Have a strong impact on the image of power supply enterprise.Improve the professional knowledge and technical merit of staff, it has also become State Grid Corporation of China
One of important process.
At present in transmission of electricity, distribution, electricity consumption in power system, operation power pattern and each measurement meter are subordinate to and covered
The training of button relation mainly passes through following two methods:
1st, theory is given lessons：The educational training carried out mainly in a manner of traditional preaching and in the way of case training, effect
It is bad, lack to press close to the training means at scene, it is impossible to and practice effectively linking, operating personnel can not distinguish emphasis in operation,
Trainee's ideology deficiency, memory are not deep enough so that result of training is not ideal enough；
2nd, traditional master worker's transmit, aid and lead pattern：It is master worker to specify the personnel with higher professional skill, through live basic
Institutional learning, scene are learned on the job, three steps of practice of joining a regular shift or class, and are directly contacted real power system, are accumulated by practical experience, are carried
High-tech is horizontal.Because actual field system is very huge, it is impossible to the framework of comprehensive engagement and cognitive system and operation phenomenon so that
It is low that level of skill improves efficiency.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of side of simulation 35kV circuits stoichiometric point power hitch relation
Method, this method is using simulation system with the different user groups in the total supply lines of 35kV, two 10kV feeder lines and each feeder line
Into a set of power supply and power utilization network, by a set of real 35kV circuit methods of operation, reappeared in laboratory simulation, realize that circuit is born
Lotus operation simulation, the simulation of stoichiometric point power hitch relation.
To solve the above problems, the technical solution used in the present invention is：
Step 1., which builds physical device simulation system, includes following equipment：
(1) it is used for 1 set of 35kV analog measurements screen for realizing the simulation of system summary table and 2 10kV Source of Gateway Meter metering environment,
The 35kV analog measurements screen includes metering summary table, 2 10kV Source of Gateway Meter and simulated loading system；The simulated loading system
Fictitious load is provided for each metering user, the loadtype of control user is calculated by PC；
(2) it is used for 2 sets of massive quantity power supply and measurement metering analog cabinet for realizing the simulation of system massive quantity power supply and measurement metering user, the high confession
Height meter metering analog cabinet includes phase three-wire three intelligent meter and simulated loading system；The simulated loading system is that each metering user carries
For fictitious load, the loadtype for controlling user is calculated by PC；
(3) by realizing the height of the high simulation for low meter metering user of system for low 2 sets of meter metering analog cabinet, the high confession
Low meter metering analog cabinet includes three-phase and four-line intelligent meter and simulated loading system；The simulated loading system is that each metering user carries
For fictitious load, the loadtype for controlling user is calculated by PC；
(4) it is used to realize that the public of the simulation that system public affairs become metering user becomes 1 set of metering analog cabinet, the public change metering analog
Cabinet includes three-phase and four-line intelligent meter and simulated loading system；The simulated loading system provides fictitious load for each metering user,
The loadtype of control user is calculated by PC；
(5) it is used for low-voltage customer 1 set of the cabinet of simulation for realizing the simulation of system low-voltage metering user, the low-voltage customer simulation
Cabinet includes single-phase smart meter, three-phase and four-line intelligent meter and simulated loading system；The simulated loading system is that each metering user carries
For fictitious load, the loadtype for controlling user is calculated by PC；
Step 2. is based on physical device simulation system in step 1 and calculates hitch relation：
2-1. sets load, loadtype and the instantaneous power of two feeder line metering users, that is, passes through control
The analog power of corresponding user, export the amplitude and phase of the voltage x current specified；
PC described in 2-2. calculates the public instantaneous power for becoming summary table according to the instantaneous power and line loss per unit of low-voltage customer；
Public voltage, electric current and the phase become after analog power output calculating corresponding to summary table of PC control described in 2-3., is applied
It is added to public change summary table；
2-4. calculates 10kV feeder lines critical point according to massive quantity power supply and measurement user, the high instantaneous power for low meter user and public change user
The instantaneous power and power factor of table；
Voltage, electric current and phase after analog power output calculating corresponding to PC control 10kV feeder line Source of Gateway Meter described in 2-5.
Position, is applied to 10kV feeder line Source of Gateway Meter；
2-6. calculates the instantaneous power and power factor of 35kV summary tables according to the instantaneous power of two 10kV feeder line Source of Gateway Meter；
PC described in 2-7. controls voltage, electric current and the phase after analog power output calculating corresponding to 35kV summary tables, applies
To 35kV summary tables.
It is using beneficial effect caused by above-mentioned technical proposal：
This invention derives calculation and virtual load power technology by function, realizes simulation in laboratory environments and matches somebody with somebody
Hitch logical relation between electric line, each stoichiometric point of electricity consumption user in operation of power networks.In power system skills training, lead to
The simulated maneuver for building equipment is crossed, theoretical training is effectively combined with hands-on, the theory for lifting student is recognized
Know, further improve the effect of teaching, training.Good research experiment is provided for electricity inspection personnel and collection operation maintenance personnel
Platform, electricity inspection new technology and method is constantly sought, realize the zero distance linking of scientific research, training and production work.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is metering user hitch relation schematic diagrams at different levels in the present invention.
Fig. 2 is the structural relation schematic diagram of physical device simulation system in the present invention.
Fig. 3 is the layout drawing of the cabinet of simulation system in the present invention.
Fig. 4 is the analog line wiring diagram of simulation system in the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, 1-4 and specific embodiment pair below in conjunction with the accompanying drawings
Invention carries out clear, complete description.
Embodiment as Figure 1-Figure 4, its key technology are that (1) uses virtual load power technology, realize each meter
The load condition simulation of amount point；(2) simulation of the 35kV distribution, Electro-metering environment of complete set is established；(3) science meter is used
Calculation method controls the instantaneous power of each stoichiometric point, realizes the simulation of circuit hitch relation.
As Figure 1-Figure 4, the operating process of the present embodiment is as follows：
Step 1., which builds physical device simulation system, includes following equipment：
(1) it is used for 1 set of 35kV analog measurements screen for realizing the simulation of system summary table and 2 10kV Source of Gateway Meter metering environment,
The 35kV analog measurements screen includes metering summary table, 2 10kV energy meterings tables and simulated loading system；The simulation loading system
Unite and provide fictitious load for each metering user, the loadtype of control user is calculated by PC；
(2) it is used for 2 sets of massive quantity power supply and measurement metering analog cabinet for realizing the simulation of system massive quantity power supply and measurement metering user, the height
Include phase three-wire three intelligent meter and simulated loading system for height meter metering analog cabinet；The simulated loading system is each metering user
Fictitious load is provided, the loadtype of control user is calculated by PC；
(3) by realizing the height of the high simulation for low meter metering user of system for low 2 sets of meter metering analog cabinet, the high confession
Low meter metering analog cabinet includes three-phase and four-line intelligent meter and simulated loading system；The simulated loading system is that each metering user carries
For fictitious load, the loadtype for controlling user is calculated by PC；
(4) it is used to realize that the public of the simulation that system public affairs become metering user becomes 1 set of metering analog cabinet, the public change metering analog
Cabinet includes three-phase and four-line intelligent meter and simulated loading system；The simulated loading system provides fictitious load for each metering user,
The loadtype of control user is calculated by PC；
(5) it is used for low-voltage customer 1 set of the cabinet of simulation for realizing the simulation of system low-voltage metering user, the low-voltage customer simulation
Cabinet includes single-phase smart meter, three-phase and four-line intelligent meter and simulated loading system；The simulated loading system is that each metering user carries
For fictitious load, the loadtype for controlling user is calculated by PC；
The epitope of 35kV cabinets the 1st is system summary table, measures the electricity and instantaneous power summation on whole lower feeder line road, and 1#
Source of Gateway Meter and 2# Source of Gateway Meter electricity and power summation.
The 35kV cabinets 1# Source of Gateway Meter, measure 1#10kV feeder lines electricity and instantaneous power, and No. 1 massive quantity power supply and measurement metering
Cabinet A faces and B faces electric energy meter metering electricity, No. 1 height are for low meter metering cabinet A faces and B faces electric energy meter metering electricity, public change cabinet A faces electricity
The summation of energy meter volume and electricity；Five epitopes altogether.
The 35kV cabinets 2# Source of Gateway Meter, measure 2#10kV feeder lines electricity and instantaneous power, and No. 2 massive quantity power supply and measurement meterings
Cabinet A faces and B faces electric energy meter metering electricity, No. 2 height are for low meter metering cabinet A faces and B faces electric energy meter metering electricity, public change cabinet B faces electricity
The summation of energy meter volume and electricity；Five epitopes altogether.
The public affairs become electric quantity metering summation of the cabinet A face electric energy meters into low-voltage customer cabinet A faces electric energy meter.
The public affairs become electric quantity metering summation of the cabinet B face electric energy meters into low-voltage customer cabinet B faces electric energy meter.
Step 2. is based on physical device simulation system in step 1 and calculates hitch relation：
System sets user load fixation, is supplied to metering user by the analog power of simulated loading system, realizes line
The simulation of road hitch relation specifically controls computational methods as follows：
If PNFor the active power of each metering epitope metering, QNThe reactive power measured for each metering epitope, if P 'NTo be each
Measure the main line active power of epitope, Q 'NFor the main line reactive power of each metering epitope, CNEpitope TA no-load voltage ratios are measured to be each,
SNFor line loss per unit, BNTo become loss rate, UNEpitope voltage, INFor electric current, θNFor angle, W is expressed as meter.N represents each table for numeral
Position, such as：C7Represent W7The TA no-load voltage ratios of stoichiometric point electric energy meter.1) 1# is public becomes stoichiometric point W8Electric current and angle control formula：
Calculated according to low-voltage customer loadtype, U, I and θ angle are determined, using U9、U10、U11、U12And I9、I10、I11、I12With
θ calculates low-tension supply output：
Calculate W8Table instantaneous active power and reactive power, calculation formula (1)-(4) are as follows：
P'8=3 × U9×I9×cosθ9×(1+X9)+3×U10×I10×cosθ10×(1+X10)
+U11×I11×cosθ11×(1+X11)+U12×I12×cosθ12×(1+X12) (1)
Q'8=3 × U9×I9×sinθ9×(1+X9)+3×U10×I10×sinθ10×(1+X10)
+U11×I11×sinθ11×(1+X11)+U12×I12×sinθ12×(1+X12) (3)
Afterwards, public change metering line W is calculated8Power supply calculates the angle, θ of output8, calculation formula (5) is as follows：
Afterwards, public change metering line W is calculated8Power supply calculates the current amplitude I of output8, calculation formula (6) is as follows：
Public affairs become metering line W8The voltage magnitude of power supply output is 220V.
2) 2# is public becomes stoichiometric point W17Electric current and angle control formula：
Calculated according to low-voltage customer loadtype, determine U, I and θ angle；Employ U18、U19、U20、U21And I18、I19、
I20、I21And θ)
Calculate W17Table instantaneous active power and reactive power, calculation formula (7)-(10) are as follows:
P'17=3 × U18×I18×cosθ19×(1+X19)+3×U19×I19×cosθ19×(1+X19)
+U20×I20×cosθ20×(1+X20)+U21×I21×cosθ21×(1+X21) (7)
Q'17=3 × U18×I18×sinθ18×(1+X18)+3×U19×I19×sinθ19×(1+X19)
+U20×I20×sinθ20×(1+X21)+U21×I21×sinθ21×(1+X21) (9)
Afterwards, public change metering line W is calculated17Power supply calculates the angle, θ of output17, calculation formula (11) is as follows：
Afterwards, public change metering line W is calculated17Power supply calculates the current amplitude I of output17, calculation formula (12) is as follows：
3) 1#10KV circuits W2The control mode of electric current and angle；
(1) the total active-power P of circuit is calculated2', calculation formula (13) is as follows：
P2'=P4'×(1+X4)+P5'×(1+X5)+P6'×(1+X6+B6)+P7'×(1+X7+B7)
+P8'×(1+X8+B8) (13)
Wherein, P'4=3 × U4×I4×cosθ4×C4×100
P'5=3 × U5×I5×cosθ5×C5×100
P'6=3 × U6×I6×cosθ6×C6
P'7=3 × U7×I7×cosθ7×C7
P'8=3 × U8×I8×cosθ8×C8
(2) electric energy meter metering active-power P is calculated2, calculation formula (14) is as follows：
(3) the total reactive power Q of circuit is calculated2', calculation formula (15) is as follows：
Q2'=Q4'×(1+X4)+Q5'×(1+X5)+Q6'×(1+X6+B6)+Q7'×(1+X7+B7)
+Q8'×(1+X8+B8) (15)
Wherein, Q'4=3 × U4×I4×sinθ4×C4×100
Q'5=3 × U5×I5×sinθ5×C5×100
Q'6=3 × U6×I6×sinθ6×C6
Q'7=3 × U7×I7×sinθ7×C7
Q'8=3 × U8×I8×sinθ8×C8
(4) electric energy meter W is calculated2Measure reactive power Q2, calculation formula (16) is as follows：
(5) power supply calculates the angle, θ of output2, calculation formula (17) is as follows：
(6) power supply calculates the current amplitude I of output2, calculation formula (18) is as follows：
4) 2#10KV circuits W3The control mode of electric current and angle；
(1) the total active-power P of circuit3', calculation formula (19) is as follows：
P3'=P13'×(1+X13)+P14'×(1+X14)+P15'×(1+X15+B15)+P16'×(1+X16+B16)
+P17'×(1+X17+B17) (19)
Wherein, P'13=3 × U13×I13×cosθ13×C14×100
P'14=3 × U14×I14×cosθ14×C14×100
P'15=3 × U15×I15×cosθ15×C15
P'16=3 × U16×I16×cosθ16×C16
P'17=3 × U17×I17×cosθ17×C17
(2) electric energy meter W3 metering active-power Ps are calculated3, calculation formula (20) is as follows：
(3) the total reactive power Q of circuit is calculated3', calculation formula (21) is as follows：
Q3'=Q13'×(1+X13)+Q14'×(1+X14)+Q15'×(1+X15+B15)
+Q16'×(1+X16+B16)+Q17'×(1+X17+B17) (21)
Wherein, Q'13=3 × U13×I13×sinθ13×C13×100
Q'14=3 × U14×I14×sinθ14×C14×100
Q'15=3 × U15×I15×sinθ15×C15
Q'16=3 × U16×I16×sinθ16×C16
Q'17=3 × U17×I17×sinθ17×C17
(4) electric energy meter W is calculated3Measure reactive power Q3, calculation formula (22) is as follows：
(5) angle, θ that power supply calculates output is calculated3, calculation formula (23) is as follows：
(6) power supply calculates the current amplitude I of output3, calculation formula (24) is as follows：
5) 35KV summary tables W1The control mode and formula of electric current and angle；
Always there are power and reactive power according to two 10kVK feeder lines power and calculating circuit；
(1) the total active power of circuit calculates formula P'1, calculation formula (25) is as follows:
P'1=(P'2×(1+X2)+P'3×(1+X3))×(1+B1) (25)
Wherein, P'2=300 × U2×I2×cosθ2×C2
P'3=300 × U3×I3×cosθ3×C3
(2) electric energy meter W is calculated1Measure active-power P1, calculation formula (26) is as follows：
(3) calculate the total reactive power of circuit and calculate formula Q'1, calculation formula (27) is as follows：
Q'1=(Q'2×(1+X2)+Q'3×(1+X3))×(1+B1) (27)
Wherein, Q'2=300 × U2×I2×sinθ2×C2
Q'3=300 × U3×I3×sinθ3×C3
(4) electric energy meter W is calculated1Measure reactive power Q1, calculation formula (28) is as follows：
(5) angle, θ that power supply calculates output is calculated1, calculation formula (29) is as follows：
(6) power supply calculates the current amplitude I of output1, calculation formula (30) is as follows：
The operation principle of the present invention is as follows：
Simulated loading system provides required analog voltage and electric current for each stoichiometric point, and each stoichiometric point corresponds to a set of three
Phase virtual load programmable power supply；The line loss per unit of each metering line, the change loss rate of transformer, stoichiometric point are set by computer simulation
CT and PT no-load voltage ratio.
After parameter preset is provided with, virtual load programmable power supply is opened, fictitious load, system root are provided for user's stoichiometric point
Present situation and parameter preset are run according to stoichiometric point, calculates higher level's bus line load operation parameter, calculates the instantaneous load of summary table,
The simulation load of virtual load programmable power supply output voltage, electric current and power factor matching corresponding to control.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in previous embodiment, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the spirit and model of technical scheme of the embodiment of the present invention
Enclose.
Claims (1)
- A kind of 1. method of simulation 35kV circuit stoichiometric point hitch relations, it is characterised in that step is as follows：Step 1., which builds physical device simulation system, includes following equipment：（1）It is described for 1 set of the 35kV analog measurements screen for the simulation for realizing system summary table and 2 10kV Source of Gateway Meter metering environment 35kV analog measurements screen includes metering summary table, 2 10kV Source of Gateway Meter and simulated loading system；The simulated loading system is each meter Measure user and fictitious load is provided, the loadtype of control user is calculated by PC；（2）For 2 sets of the massive quantity power supply and measurement metering analog cabinet for the simulation for realizing system massive quantity power supply and measurement metering user, the massive quantity power supply and measurement Metering analog cabinet includes phase three-wire three intelligent meter and simulated loading system；The simulated loading system provides mould for each metering user Intend load, the loadtype of control user is calculated by PC；（3）It is described high for low meter by realizing the height of the high simulation for low meter metering user of system for low 2 sets of meter metering analog cabinet Metering analog cabinet includes three-phase and four-line intelligent meter and simulated loading system；The simulated loading system provides mould for each metering user Intend load, the loadtype of control user is calculated by PC；（4）For realizing that the public of the public simulation for becoming metering user of system becomes 1 set of metering analog cabinet, the public affairs become metering analog cabinet bag Include three-phase and four-line intelligent meter and simulated loading system；The simulated loading system provides fictitious load for each metering user, passes through PC calculates the loadtype of control user；（5）The low-voltage customer of simulation for realizing system low-voltage metering user simulates 1 set of cabinet, and the low-voltage customer simulates cabinet bag Include single-phase smart meter, three-phase and four-line intelligent meter and simulated loading system；The simulated loading system provides mould for each metering user Intend load, the loadtype of control user is calculated by PC；Step 2. is based on physical device simulation system in step 1 and calculates hitch relation：2-1. sets load, loadtype and the instantaneous power of two feeder line metering users, i.e., corresponding by controlling The analog power of user, export the amplitude and phase of the voltage x current specified；PC described in 2-2. calculates the public instantaneous power for becoming summary table according to the instantaneous power and line loss per unit of low-voltage customer；Public voltage, electric current and the phase become after analog power output calculating corresponding to summary table of PC control described in 2-3., is applied to Public affairs become summary table；2-4. is according to massive quantity power supply and measurement user, the high wink that 10kV Source of Gateway Meter is calculated for low meter user and the public instantaneous power for becoming user When power and power factor；Voltage, electric current and phase after analog power output calculating corresponding to PC control 10kV feeder line Source of Gateway Meter described in 2-5., It is applied to 10kV feeder line Source of Gateway Meter;2-6. calculates the instantaneous power and power factor of 35kV summary tables according to the instantaneous power of two 10kV feeder line Source of Gateway Meter；Voltage, electric current and phase after analog power output calculating corresponding to PC control 35kV summary tables described in 2-7., are applied to 35kV summary tables.
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| CN105185207A (en) * | 2015-10-20 | 2015-12-23 | 国网浙江省电力公司培训中心 | Intelligent transformer substation training system with delaminating and districting structure |
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| CN1614837A (en) * | 2003-11-06 | 2005-05-11 | 方刚 | Assembled trans formers |
| CN201616204U (en) * | 2009-09-27 | 2010-10-27 | 河南省电力公司信阳供电公司 | Wiring analog device for electric energy meter |
| CN202487039U (en) * | 2011-12-13 | 2012-10-10 | 南京工程学院 | Voltage stabilization teaching experiment apparatus in electric power system |
| CN104333126A (en) * | 2014-10-27 | 2015-02-04 | 国家电网公司 | Large hydropower engineering power supply system |
| CN105185207A (en) * | 2015-10-20 | 2015-12-23 | 国网浙江省电力公司培训中心 | Intelligent transformer substation training system with delaminating and districting structure |
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