CN105513469A - Method for simulating measuring point buckling relation of 35kV line - Google Patents

Abstract

The invention discloses a method for simulating measuring point buckling relation of a 35kV line, wherein the method comprises the steps of 1, establishing an actual equipment simulating system; 2, calculating the buckling relation based on a simulating system, and the step comprises the processes of 2-1, setting two feed lines for measuring the load, the load type and instantaneous power of a user, 2-2, calculating the instantaneous power of a common transformer master meter by a PC according to the instantaneous power of a low-voltage user and a line loss rate, 2-3, making an analog power supply which corresponds with the common transformer master meter output the calculated voltage, the current and the phase by the PC, applying the calculated voltage, the current and the phase on the common transformer master meter, 2-4, calculating the instantaneous power and the power factor of a 10kV gateway meter according to a high-voltage side meter, a high-voltage side meter and the instantaneous power of the common transformer user, 2-5, making an analog power supply which corresponds with the 10kV feed line gateway meter output the calculated voltage, the current and the phase by the PC, and applying the calculated voltage, the current and the phase on the 10kV feed line gateway meter, 2-6, calculating the instantaneous power and power factor of a 35kV master meter according to the instantaneous powers of two 10kV feed line gateway meters, and 2-7, making an analog power supply which corresponds with the 35kV master meter output the calculated voltage, the current and the phase by the PC, and applying the calculated voltage, the current and the phase on the 35kV master meter.

Description

A kind of method simulating 35kV circuit stoichiometric point hitch relation

Technical field

The invention belongs to measurement meter simulation training field in electric system, be specifically related to a kind of method simulating 35kV circuit stoichiometric point hitch relation.

Background technology

Along with the construction of intelligent grid, modern power network is day by day complicated, intelligent, countryeconomic development is increasing to electrical energy demands, the correctness of various metering user metering electric energy seems particularly important, and in the operation of electric system reality, because of the existence of various complicated factor, capital causes metering and electricity charge charge mistake, as: measurement meter fault, metering line fault, current transformer is selected not mate, the electricity filching behavior etc. of Electricity customers.Capital is given countryor Electricity customers brings unknown economic loss, has a strong impact on the image of power supply enterprise.Improve professional knowledge and the technical merit of staff, become countryone of important process of grid company.

At present about in transmission of electricity, distribution, electricity consumption in electric system, operation power pattern and each measurement meter to be subordinate to the training of hitch relation mainly through following two kinds of methods:

1, theory is given lessons: mainly with the educational training that the mode of traditional preach mode and case training is carried out, poor effect, lack to press close to on-the-spot training means, effectively can not be connected with practice, operating personnel cannot distinguish emphasis when operating, trainee's ideology is not enough, and memory is deep not, makes result of training not ideal enough;

2, traditional master worker's transmit, aid and lead pattern: specify the personnel with higher professional skill to be master worker, learn through on-the-spot primary institution, learn on the job in scene, practice three steps of joining a regular shift or class, the real electric system of direct contact, is accumulated by practical experience, improves technical level.Because actual field system is very huge, can not comprehensive engagement and cognitive system framework and run phenomenon, level of skill is raised the efficiency low.

Summary of the invention

Technical matters to be solved by this invention is to provide a kind of method simulating 35kV circuit stoichiometric point power hitch relation, this method utilizes simulation system to form a set of power supply and power utilization network with the different user in the total supply line of 35kV, two 10kV feeder lines and each feeder line, by a set of real 35kV circuit method of operation, reappear in laboratory simulation, realize line load working train family, the simulation of stoichiometric point power hitch relation.

For solving the problem, this inventionthe technical scheme taked is:

Step 1. is built physical device simulation system and is comprised following equipment:

(1) for realizing 35kV analog measurement screen 1 cover of the simulation of system summary table and 2 10kV Source of Gateway Meter metering environment, described 35kV analog measurement screen comprises metering summary table, 2 10kV Source of Gateway Meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(2) the massive quantity power supply and measurement metering analog cabinet 2 for realizing the simulation of system massive quantity power supply and measurement metering user overlaps, and described massive quantity power supply and measurement metering analog cabinet comprises phase three-wire three intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(3) supply the height of the simulation of low meter metering user to overlap for low meter metering analog cabinet 2 for realizing system height, described height comprises three-phase and four-line intelligent meter and simulated loading system for low meter metering analog cabinet; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(4) public affairs becoming the simulation of metering user for realizing system public affairs become metering analog cabinet 1 and overlap, and described public affairs become metering analog cabinet and comprise three-phase and four-line intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(5) the low-voltage customer simulation cabinet 1 for realizing the simulation of system low-voltage metering user overlaps, and described low-voltage customer simulation cabinet comprises single-phase smart meter, three-phase and four-line intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

Step 2. calculates hitch relation based on physical device simulation system in step 1:

2-1. arranges the load of two feeder line metering users, loadtype and instantaneous power, namely by controlling the analog power of respective user, exports amplitude and the phase place of the electric current and voltage of specifying;

PC described in 2-2., according to the instantaneous power of low-voltage customer and line loss per unit, calculates the public instantaneous power becoming summary table;

The analog power that PC described in 2-3. controls public affairs change summary table corresponding exports voltage, electric current and phase place after calculating, is applied to public change summary table;

2-4. is according to massive quantity power supply and measurement user, high instantaneous power and the power factor supplying the instantaneous power of low meter user and public change user to calculate 10kV feeder line Source of Gateway Meter;

The analog power that described in 2-5., PC control 10kV feeder line Source of Gateway Meter is corresponding exports voltage, electric current and phase place after calculating, is applied to 10kV feeder line Source of Gateway Meter;

2-6. calculates instantaneous power and the power factor of 35kV summary table according to the instantaneous power of two 10kV feeder line Source of Gateway Meter;

The analog power that described in 2-7., PC control 35kV summary table is corresponding exports voltage, electric current and phase place after calculating, is applied to 35kV summary table.

The beneficial effect adopting technique scheme to produce is:

This invention, by function derivation account form and virtual load power technology, achieves the hitch logical relation in laboratory environments between analog ligand electric line, each stoichiometric point of electricity consumption user in operation of power networks.In electric system skills training, by building the simulated maneuver of equipment, theoretical training is effectively combined with hands-on, the theory promoting student is cognitive, improves the effect of teaching, training further.For electric power inspector with gather operation maintenance personnel and provide good research experiment platform, constantly seek electric power inspection new technology and method, realize scientific research, the zero distance of training and production work is connected.

Accompanying drawing explanation

In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, to use to required in embodiment or description of the prior art below accompanying drawingbe briefly described, apparently, in the following describes accompanying drawingsome embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also according to these accompanying drawingobtain other accompanying drawing.

fig. 1for metering user hitch relation signal at different levels in the present invention figure.

fig. 2for the structural relation of physical device simulation system in the present invention is illustrated figure.

fig. 3for the layout of the cabinet of simulation system in the present invention figure.

fig. 4for the analog line wiring of simulation system in the present invention figure.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing 1-4with specific embodiment, clear, complete description is carried out to invention.

as Fig. 1- fig. 4shown embodiment, its gordian technique is that (1) adopts virtual load power technology, realizes the load condition simulation of each stoichiometric point; (2) the 35kV distribution of complete set, the simulation of Electro-metering environment is set up; (3) adopt scientific algorithm method to control the instantaneous power of each stoichiometric point, realize the simulation of circuit hitch relation.

as Fig. 1- fig. 4shown in, the operating process of the present embodiment is as follows:

Step 1. is built physical device simulation system and is comprised following equipment:

(1) for realizing 35kV analog measurement screen 1 cover of the simulation of system summary table and 2 10kV Source of Gateway Meter metering environment, described 35kV analog measurement screen comprises metering summary table, 2 10kV energy metering tables and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(2) the massive quantity power supply and measurement metering analog cabinet 2 for realizing the simulation of system massive quantity power supply and measurement metering user overlaps, and described massive quantity power supply and measurement metering analog cabinet comprises phase three-wire three intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(3) supply the height of the simulation of low meter metering user to overlap for low meter metering analog cabinet 2 for realizing system height, described height comprises three-phase and four-line intelligent meter and simulated loading system for low meter metering analog cabinet; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(4) public affairs becoming the simulation of metering user for realizing system public affairs become metering analog cabinet 1 and overlap, and described public affairs become metering analog cabinet and comprise three-phase and four-line intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(5) the low-voltage customer simulation cabinet 1 for realizing the simulation of system low-voltage metering user overlaps, and described low-voltage customer simulation cabinet comprises single-phase smart meter, three-phase and four-line intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

Described 35kV cabinet the 1st epi-position is system summary table, measures electricity and the 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.

Described 35kV cabinet 1# Source of Gateway Meter, metering 1#10kV feeder line electricity and instantaneous power, and No. 1 massive quantity power supply and measurement metering cabinet A face and B face electric energy meter metering electricity, No. 1 high confession low meter metering cabinet A face and B face electric energy meter metering electricity, the public summation becoming cabinet A face electric energy meter metering electricity; Amount to five epi-positions.

Described 35kV cabinet 2# Source of Gateway Meter, metering 2#10kV feeder line electricity and instantaneous power, and No. 2 massive quantity power supply and measurement metering cabinet A faces and B face electric energy meter metering electricity, No. 2 high confession low meter metering cabinet A faces and B face electric energy meter metering electricity, the public summation becoming cabinet B face electric energy meter metering electricity; Amount to five epi-positions.

Described public affairs become the electric quantity metering summation that cabinet A face electric energy meter is low-voltage customer cabinet A face electric energy meter.

Described public affairs become the electric quantity metering summation that cabinet B face electric energy meter is low-voltage customer cabinet B face electric energy meter.

Step 2. calculates hitch relation based on physical device simulation system in step 1:

Operation system setting user load fixation, is supplied to metering user by the analog power of simulated loading system, and the simulation concrete controlling calculation method realizing circuit hitch relation is as follows:

If P _nfor the active power of each metering epi-position metering, Q _nfor the reactive power of each metering epi-position metering, if P ' _nfor the main line active power of each metering epi-position, Q ' _nfor the main line reactive power of each metering epi-position, C _nfor each metering epi-position TA no-load voltage ratio, S _nfor line loss per unit, B _nfor loss on transmission rate, U _nepi-position voltage, I _nfor electric current, θ _nfor angle, W is expressed as meter.N is each epi-position of numeral, such as: C ₇represent W ₇the TA no-load voltage ratio of stoichiometric point electric energy meter.1) 1# public affairs become stoichiometric point W ₈electric current and Angle ambiguity formula:

Calculate according to low-voltage customer loadtype, determine U, I and θ angle, adopt U ₉, U ₁₀, U ₁₁, U ₁₂and I ₉, I ₁₀, I ₁₁, I ₁₂calculate low-tension supply with θ to export:

Calculate W ₈table instantaneous active power and reactive power, computing formula (1)-(4) are as follows:

P' ₈＝3×U ₉×I ₉×cosθ ₉×(1+X ₉)+3×U ₁₀×I ₁₀×cosθ ₁₀×(1+X ₁₀)

+U ₁₁×I ₁₁×cosθ ₁₁×(1+X ₁₁)+U ₁₂×I ₁₂×cosθ ₁₂×(1+X ₁₂)(1)

$P_8=\frac{{P^{\′}}_8}{C_8}---\left(2\right)$

Q' ₈＝3×U ₉×I ₉×sinθ ₉×(1+X ₉)+3×U ₁₀×I ₁₀×sinθ ₁₀×(1+X ₁₀)

+U ₁₁×I ₁₁×sinθ ₁₁×(1+X ₁₁)+U ₁₂×I ₁₂×sinθ ₁₂×(1+X ₁₂)(3)

$Q_8=\frac{{Q^{\′}}_8}{C_8}---\left(4\right)$

Afterwards, public change metering line W is calculated ₈power supply calculates the angle θ exported ₈, computing formula (5) is as follows:

${\mathrm{\θ}}_8=arctan\frac{Q_8}{P_8}---\left(5\right)$

Afterwards, public change metering line W is calculated ₈power supply calculates the current amplitude I exported ₈, computing formula (6) is as follows:

$I_8=\frac{P_8}{3\×U_8\×{\mathrm{cos\θ}}_8}---\left(6\right)$

Public change metering line W ₈the voltage magnitude that power supply exports is 220V.

2) 2# public affairs become stoichiometric point W ₁₇electric current and Angle ambiguity formula:

Calculate according to low-voltage customer loadtype, determine U, I and θ angle; Have employed U ₁₈, U ₁₉, U ₂₀, U ₂₁and I ₁₈, I ₁₉, I ₂₀, I ₂₁and θ)

Calculate W ₁₇table instantaneous active power and reactive power, computing formula (7)-(10) are as follows:

P' ₁₇＝3×U ₁₈×I ₁₈×cosθ ₁₉×(1+X ₁₉)+3×U ₁₉×I ₁₉×cosθ ₁₉×(1+X ₁₉)

+U ₂₀×I ₂₀×cosθ ₂₀×(1+X ₂₀)+U ₂₁×I ₂₁×cosθ ₂₁×(1+X ₂₁)(7)

$P_{17}=\frac{{P^{\′}}_{17}}{C_{17}}---\left(8\right)$

Q' ₁₇＝3×U ₁₈×I ₁₈×sinθ ₁₈×(1+X ₁₈)+3×U ₁₉×I ₁₉×sinθ ₁₉×(1+X ₁₉)

+U ₂₀×I ₂₀×sinθ ₂₀×(1+X ₂₁)+U ₂₁×I ₂₁×sinθ ₂₁×(1+X ₂₁)(9)

$Q_{17}=\frac{{Q^{\′}}_{17}}{C_{17}}---\left(10\right)$

Afterwards, public change metering line W is calculated ₁₇power supply calculates the angle θ exported ₁₇, computing formula (11) is as follows:

${\mathrm{\θ}}_{17}=arctan\frac{Q_{17}}{P_{17}}---\left(11\right)$

Afterwards, public change metering line W is calculated ₁₇power supply calculates the current amplitude I exported ₁₇, computing formula (12) is as follows:

$I_{17}=\frac{P_{17}}{3\×U{1}_7\×{\mathrm{cos\θ}}_{17}}---\left(12\right)$

3) 1#10KV circuit W ₂the control mode of electric current and angle;

(1) the total active-power P of computational scheme ₂', computing formula (13) is as follows:

P ₂'＝P ₄'×(1+X ₄)+P ₅'×(1+X ₅)+P ₆'×(1+X ₆+B ₆)+P ₇'×(1+X ₇+B ₇)

+P ₈'×(1+X ₈+B ₈)(13)

Wherein, P' ₄=3 × U ₄× I ₄× cos θ ₄× C ₄× 100

P' ₅＝3×U ₅×I ₅×cosθ ₅×C ₅×100

P' ₆＝3×U ₆×I ₆×cosθ ₆×C ₆

P' ₇＝3×U ₇×I ₇×cosθ ₇×C ₇

P' ₈＝3×U ₈×I ₈×cosθ ₈×C ₈

(2) electric energy meter metering active-power P is calculated ₂, computing formula (14) is as follows:

$P_2=\frac{{P^{\′}}_2}{C_2\×100}---\left(14\right)$

(3) the total reactive power Q of computational scheme ₂', computing formula (15) is as follows:

Q ₂'＝Q ₄'×(1+X ₄)+Q ₅'×(1+X ₅)+Q ₆'×(1+X ₆+B ₆)+Q ₇'×(1+X ₇+B ₇)

+Q ₈'×(1+X ₈+B ₈)(15)

Wherein, Q' ₄=3 × U ₄× I ₄× sin θ ₄× C ₄× 100

Q' ₅＝3×U ₅×I ₅×sinθ ₅×C ₅×100

Q' ₆＝3×U ₆×I ₆×sinθ ₆×C ₆

Q' ₇＝3×U ₇×I ₇×sinθ ₇×C ₇

Q' ₈＝3×U ₈×I ₈×sinθ ₈×C ₈

(4) electric energy is calculated table W ₂metering reactive power Q ₂, computing formula (16) is as follows:

$Q_2=\frac{{Q^{\′}}_2}{C_2\×100}---\left(16\right)$

(5) power supply calculates the angle θ exported ₂, computing formula (17) is as follows:

${\mathrm{\θ}}_2=arctan\frac{Q_2}{P_2}---\left(17\right)$

(6) power supply calculates the current amplitude I exported ₂, computing formula (18) is as follows:

$I_2=\frac{P_2}{3\×U_2\×{\mathrm{cos\θ}}_2}---\left(18\right)$

4) 2#10KV circuit W ₃the control mode of electric current and angle;

(1) the total active-power P of circuit ₃', computing formula (19) is as follows:

P ₃'＝P ₁₃'×(1+X ₁₃)+P ₁₄'×(1+X ₁₄)+P ₁₅'×(1+X ₁₅+B ₁₅)+P ₁₆'×(1+X ₁₆+B ₁₆)

+P ₁₇'×(1+X ₁₇+B ₁₇)(19)

Wherein, P' ₁₃=3 × U ₁₃× I ₁₃× cos θ ₁₃× C ₁₄× 100

P' ₁₄＝3×U ₁₄×I ₁₄×cosθ ₁₄×C ₁₄×100

P' ₁₅＝3×U ₁₅×I ₁₅×cosθ ₁₅×C ₁₅

P' ₁₆＝3×U ₁₆×I ₁₆×cosθ ₁₆×C ₁₆

P' ₁₇＝3×U ₁₇×I ₁₇×cosθ ₁₇×C ₁₇

(2) electric energy is calculated table W3 metering active-power Ps ₃, computing formula (20) is as follows:

$P_3=\frac{{P^{\′}}_3}{C_3\×100}---\left(20\right)$

(3) the total reactive power Q of computational scheme ₃', computing formula (21) is as follows:

Q ₃'＝Q ₁₃'×(1+X ₁₃)+Q ₁₄'×(1+X ₁₄)+Q ₁₅'×(1+X ₁₅+B ₁₅)

+Q ₁₆'×(1+X ₁₆+B ₁₆)+Q ₁₇'×(1+X ₁₇+B ₁₇)(21)

Wherein, Q' ₁₃=3 × U ₁₃× I ₁₃× sin θ ₁₃× C ₁₃× 100

Q' ₁₄＝3×U ₁₄×I ₁₄×sinθ ₁₄×C ₁₄×100

Q' ₁₅＝3×U ₁₅×I ₁₅×sinθ ₁₅×C ₁₅

Q' ₁₆＝3×U ₁₆×I ₁₆×sinθ ₁₆×C ₁₆

Q' ₁₇＝3×U ₁₇×I ₁₇×sinθ ₁₇×C ₁₇

(4) electric energy is calculated table W ₃metering reactive power Q ₃, computing formula (22) is as follows:

$Q_3=\frac{{Q^{\′}}_3}{C_3\×100}---\left(22\right)$

(5) calculate power supply and calculate the angle θ exported ₃, computing formula (23) is as follows:

${\mathrm{\θ}}_3=arctan\frac{Q_3}{P_3}---\left(23\right)$

(6) power supply calculates the current amplitude I exported ₃, computing formula (24) is as follows:

$I_3=\frac{P_3}{3\×U_3\×{\mathrm{cos\θ}}_3}---\left(24\right)$

5) 35KV is total table W ₁the control mode of electric current and angle and formula;

Power and reactive power is always had according to two 10kVK feeder line power and computational scheme;

(1) the total active power of circuit calculates formula P' ₁, computing formula (25) is as follows:

P' ₁＝(P' ₂×(1+X ₂)+P' ₃×(1+X ₃))×(1+B ₁)(25)

Wherein, P' ₂=300 × U ₂× I ₂× cos θ ₂× C ₂

P' ₃＝300×U ₃×I ₃×cosθ ₃×C ₃

(2) electric energy is calculated table W ₁metering active-power P ₁, computing formula (26) is as follows:

$P_1=\frac{{P^{\′}}_1}{C_1\×350}---\left(26\right)$

(3) the total reactive power of computational scheme calculates formula Q' ₁, computing formula (27) is as follows:

Q' ₁＝(Q' ₂×(1+X ₂)+Q' ₃×(1+X ₃))×(1+B ₁)(27)

Wherein, Q' ₂=300 × U ₂× I ₂× sin θ ₂× C ₂

Q' ₃＝300×U ₃×I ₃×sinθ ₃×C ₃

(4) electric energy is calculated table W ₁metering reactive power Q ₁, computing formula (28) is as follows:

$Q_1=\frac{{Q^{\′}}_1}{C_1\×350}---\left(28\right)$

(5) calculate power supply and calculate the angle θ exported ₁, computing formula (29) is as follows:

${\mathrm{\θ}}_1=arctan\frac{Q_1}{P_1}---\left(29\right)$

(6) power supply calculates the current amplitude I exported ₁, computing formula (30) is as follows:

$I_1=\frac{P_1}{3\×U_1\×{\mathrm{cos\θ}}_1}---\left(30\right)$

Principle of work of the present invention is as follows:

Simulated loading system provides required analog voltage and electric current for each stoichiometric point, the corresponding a set of three-phase virtual load programmable power supply of each stoichiometric point; The line loss per unit of each metering line is set by computer simulation, the loss on transmission rate of transformer, the no-load voltage ratio of CT and PT of stoichiometric point.

After parameter preset is provided with, open virtual load programmable power supply, for user's stoichiometric point provides fictitious load, system runs present situation and parameter preset according to stoichiometric point, calculate higher level's bus line load operation parameter, calculate the momentary load of summary table, control the simulation load of corresponding virtual load programmable power supply output voltage, electric current and power factor coupling.

Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.

Claims (1)

1. simulate a method for 35kV circuit stoichiometric point hitch relation, it is characterized in that step is as follows:

Step 1. is built physical device simulation system and is comprised following equipment:

(1) for realizing 35kV analog measurement screen 1 cover of the simulation of system summary table and 2 10kV Source of Gateway Meter metering environment, described 35kV analog measurement screen comprises metering summary table, 2 10kV Source of Gateway Meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(2) the massive quantity power supply and measurement metering analog cabinet 2 for realizing the simulation of system massive quantity power supply and measurement metering user overlaps, and described massive quantity power supply and measurement metering analog cabinet comprises phase three-wire three intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(3) supply the height of the simulation of low meter metering user to overlap for low meter metering analog cabinet 2 for realizing system height, described height comprises three-phase and four-line intelligent meter and simulated loading system for low meter metering analog cabinet; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(4) public affairs becoming the simulation of metering user for realizing system public affairs become metering analog cabinet 1 and overlap, and described public affairs become metering analog cabinet and comprise three-phase and four-line intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

(5) the low-voltage customer simulation cabinet 1 for realizing the simulation of system low-voltage metering user overlaps, and described low-voltage customer simulation cabinet comprises single-phase smart meter, three-phase and four-line intelligent meter and simulated loading system; Described simulated loading system provides fictitious load for each metering user, is calculated the loadtype controlling user by PC;

Step 2. calculates hitch relation based on physical device simulation system in step 1:

2-1. arranges the load of two feeder line metering users, loadtype and instantaneous power, namely by controlling the analog power of respective user, exports amplitude and the phase place of the electric current and voltage of specifying;

PC described in 2-2., according to the instantaneous power of low-voltage customer and line loss per unit, calculates the public instantaneous power becoming summary table;

The analog power that PC described in 2-3. controls public affairs change summary table corresponding exports voltage, electric current and phase place after calculating, is applied to public change summary table;

2-4. is according to massive quantity power supply and measurement user, high instantaneous power and the power factor supplying the instantaneous power of low meter user and the public user of change to calculate 10kV Source of Gateway Meter;

The analog power that described in 2-5., PC control 10kV feeder line Source of Gateway Meter is corresponding exports voltage, electric current and phase place after calculating, is applied to 10kV feeder line Source of Gateway Meter;

2-6. calculates instantaneous power and the power factor of 35kV summary table according to the instantaneous power of two 10kV feeder line Source of Gateway Meter;

The analog power that described in 2-7., PC control 35kV summary table is corresponding exports voltage, electric current and phase place after calculating, is applied to 35kV summary table.