CN107516894B - Coal mine high-voltage power grid load statistical method based on network topology self-learning - Google Patents

Coal mine high-voltage power grid load statistical method based on network topology self-learning Download PDF

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CN107516894B
CN107516894B CN201710670692.4A CN201710670692A CN107516894B CN 107516894 B CN107516894 B CN 107516894B CN 201710670692 A CN201710670692 A CN 201710670692A CN 107516894 B CN107516894 B CN 107516894B
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switch
voltage
power supply
coal mine
switches
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CN107516894A (en
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王新良
叶小涛
郭建锋
靳翔
王红星
付萌萌
黄青改
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Henan University of Technology
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

Abstract

The invention discloses a coal mine high-voltage power grid load statistical method based on network topology self-learning, which comprises the following steps of: firstly, topological coding is carried out on all power supply incoming line switches with switch-on states in a coal mine high-voltage power supply system; then, carrying out topological coding on other high-voltage switches of which all switch states are switched on in the coal mine high-voltage power supply system according to the coded power inlet wire switch; and finally, calculating the power supply load corresponding to each high-voltage outlet switch according to the topology analysis result of the coal mine high-voltage power grid, and completing the load statistics of the coal mine high-voltage power grid. The method can automatically learn the network topology of the coal mine high-voltage power supply system in various operation modes, complete topology coding according to the power supply relation among the high-voltage switches, and construct a network topology analysis model; and on the basis, the automatic statistics of the coal mine high-voltage power grid power supply load is realized, and the load statistics efficiency is improved.

Description

Coal mine high-voltage power grid load statistical method based on network topology self-learning
Technical Field
The invention discloses a coal mine high-voltage power grid load statistical method based on network topology self-learning, and belongs to the field of coal mine high-voltage power grid load statistical calculation.
Background
The mine high-voltage power supply system is 6kV or 10kV grade, two power supplies are generally used, and the two power supplies adopt a split operation mode or one power supply is used for standby, belong to a single-power-supply open power grid and have a radiation-shaped tree-shaped network structure. The invention provides a coal mine high-voltage power grid load statistical method based on network topology self-learning based on the characteristics of a mine high-voltage power supply system; the method can carry out network topology self-learning on the coal mine high-voltage power supply system in various operation modes, complete topology coding according to the power supply relation among the high-voltage switches, and construct a network topology analysis model; and on the basis, the automatic statistics of the coal mine high-voltage power grid power supply load is realized, and the load statistics efficiency is improved.
Disclosure of Invention
Calculating the corresponding grade k according to the numerical value of the high-voltage switch topological code, and specifically comprising the following steps of:
step 1, setting the value of k as 0, and assuming that the value of the high-voltage switch topological code is Q1;
step 2, dividing Q1 by 50, the quotient is M1, the remainder is N1, if the quotient is 0, adding 1 to the numerical value of k, and executing step 4; if the quotient is not 0, adding 1 to the value of k, and executing the step 3;
step 3, setting the value of Q1 as M1, and repeatedly executing the step 2;
and 4, finishing the calculation of the grade k.
According to the power supply relation among high-voltage switches in the coal mine high-voltage power grid, a network topology analysis model is established, and the coal mine high-voltage power grid network topology analysis is completed, and the method specifically comprises the following steps:
step 1, carrying out topological coding on all power supply incoming line switches with switch-on states in a coal mine high-voltage power supply system;
step 2, carrying out topological coding on other high-voltage switches of which all switch states are closed in the coal mine high-voltage power supply system according to the power supply inlet wire switch subjected to topological coding;
in step 1, the method specifically comprises the following steps:
step 11, nodes corresponding to all outlet switches in the coal mine high-voltage power supply system are branch nodes, and all power supply inlet switches with the switch-on state in the coal mine high-voltage power supply system are added into a set Q1; setting the value of i to 1;
step 12, taking out a power supply incoming line switch from the set Q1, and executing step 13;
step 13, the taken power supply incoming line switch is represented by SWJ, the topological code corresponding to the power supply incoming line switch is represented by Jcode, the value of the Jcode is set as i, and the SWJ is added into a set QJ; if the set Q1 is not null, adding 1 to the value of i, executing step 12, if the set Q1 is null, completing the topology coding of the power incoming line switch, and storing the power incoming line switch subjected to the topology coding in a set QJ;
in the step 2, the method specifically comprises the following steps:
step 21, adding all switches in the coal mine high-voltage power supply system into a set UA;
step 22, taking out one switch from the set QJ, and executing step 23;
step 23, the taken out switch is represented by SW1, the corresponding topology Code is represented by Code1, all outgoing switches and interconnection switches with the switch-on state adjacent to SW1 are searched in the set UA, and the searched outgoing switches and interconnection switches are taken out from the set UA and added into the set Q2; setting the value of j to 1; calculating the corresponding grade k according to the value of the topological Code1 of the switch SW 1;
step 24, taking out a switch from the set Q2, wherein the switch is represented by SW2, the corresponding topological Code is represented by Code2, and the value of Code2 is set as follows: j 50 xk+ Code 1; if the switch is a tie switch, go to step 25; if the switch is an outgoing switch, go to step 26;
step 25, searching all outgoing line switches and interconnection switches which are adjacent to the SW2 and have the switch-on states in the set UA, and taking out the searched outgoing line switches and interconnection switches from the set UA and adding the outgoing line switches and interconnection switches into the set Q2; step 27 is executed;
step 26, searching a general incoming line switch SW3 which is adjacent to the SW2 and has a switch-on state in the set UA, wherein a corresponding topology Code is represented by Code3, and calculating a corresponding grade k according to the numerical value of the topology Code2 of the switch SW 2; the value of Code3 is set to: 1*50k+ Code2, taking out the general incoming line switch SW3 with completed topology coding from the set UA and adding into the set QJ, and executing step 27;
step 27, if the set Q2 is not empty, adding 1 to the value of j, and executing step 24; if the set Q2 is empty, go to step 28;
step 28, if the set QJ is not empty, taking out a switch from the set QJ, and executing step 23; if the set QJ is empty, the topology encoding is complete.
Aiming at a mine high-voltage power supply system, a branch node-direct power supply load adjacency list T is established according to a motor load directly controlled by each branch node; through the adjacency list, the basic parameter rated power of the motor directly controlled by the adjacency list can be inquired according to the corresponding branch node number.
And constructing a branch node-high-voltage switch power supply load mapping table TT, wherein in the high-voltage switch power supply load mapping table, the power supply load corresponding to the high-voltage outlet switch can be inquired according to the corresponding branch node number of the high-voltage outlet switch, and under the initial condition, in the high-voltage switch power supply load mapping table TT, the power supply load initial value corresponding to each high-voltage outlet switch branch node is 0.
According to the topology analysis result of the coal mine high-voltage power grid, calculating the power supply load corresponding to each high-voltage outlet switch to complete the statistics of the coal mine high-voltage power grid load, and specifically comprising the following steps:
step 1, adding all high-voltage outgoing line switches in a coal mine high-voltage power supply system into a set Q and a set U;
step 2, taking out a high-voltage outgoing switch A from the set Q, wherein a topology coding result corresponding to the high-voltage outgoing switch is represented by FCode1, and the numerical value of FCode1 is equal to PQ;
step 3, taking out a high-voltage outgoing switch B from the set U, wherein a topological coding result corresponding to the high-voltage outgoing switch is represented by FCode 2;
step 4, dividing by 50 with FCode1, wherein the remainder is represented by V1 and commercial L1; divide by 50 with FCode2, the remainder is denoted by V2, commercial L2; if V1 is equal to V2, perform step 5; if V1 is not equal to V2 and set U is not empty, go to step 3; if V1 is not equal to V2 and set U is empty, go to step 8;
step 5, if L1 is equal to 0, adding a high-voltage outlet switch B into the set QS, and executing step 7; if L1 does not equal 0, go to step 6;
step 6, setting the value of FCode1 to L1, setting the value of FCode2 to L2, and executing step 4;
step 7, if the set U is not empty, setting the value of FCode1 as PQ, and executing step 3; if the set U is empty, executing step 8;
step 8, setting the numerical value of RFH to be 0, taking out a high-voltage outlet switch from the set QS, and executing step 9;
step 9, the taken out high-voltage outgoing line switch is represented by C, a load value FH of direct power supply is searched in a branch node-direct power supply load adjacency list T according to the serial number of the branch node corresponding to the switch C, a numerical value obtained by adding the numerical value of RFH and the numerical value FH is represented by TRFH, the numerical value of RFH is set as TRFH, and the step 10 is executed;
step 10, if the set QS is not empty, taking out the next high-voltage outlet switch from the set QS, and executing step 9; if the set QS is empty, the RFH is the power supply load of the high-voltage outgoing switch A, a power supply load parameter corresponding to the RFH is found in a power supply load mapping table TT between a branch node and the high-voltage switch according to the branch node number corresponding to the high-voltage outgoing switch A, and the value of the power supply load parameter is set to be the RFH; executing the step 11;
step 11, if the set Q is not empty, adding all high-voltage outlet switches in the coal mine high-voltage power supply system into the set U, and executing the step 2; if the set Q is empty, the information stored in the branch node-high voltage switch power supply load mapping table TT is the power supply load corresponding to each high voltage switch.
Drawings
Fig. 1 is a diagram of a coal mine high-voltage power supply system, and fig. 2 is a diagram of a coal mine high-voltage power supply system after topological coding.
Detailed Description
In the coal mine high-voltage power supply system diagrams shown in the attached figures 1 and 2, branch nodes filled with black are in an opening state, and branch nodes not filled with black are in a closing state; setting a power supply branch node of a mine high-voltage power supply system, wherein the power supply branch node is a branch node directly powered by a superior power supply department; in the coal mine high-voltage power supply system diagrams shown in the attached figures 1 and 2, the power branch node is X1And X2。
According to the power supply relation among high-voltage switches in the coal mine high-voltage power grid, a network topology analysis model is established, and the coal mine high-voltage power grid network topology analysis is completed, and the method specifically comprises the following steps:
step (ii) of1. Performing topological coding on all power incoming line switches with switch-on states in a coal mine high-voltage power supply system, wherein the topological coding result of the power incoming line switches is shown in an attached figure 2; wherein X1Is 1, X2The topological code of (2);
step 2, performing topological coding on all other high-voltage switches of which the switch states are closed in the coal mine high-voltage power supply system according to the power incoming line switch subjected to the topological coding, wherein the switch topological coding result is shown in an attached figure 2; wherein X3Is 1 × 50+1, X4Is 2X 50+1, X5Is 1 × 50+2, X6Is 2X 50+2, X7Is 1 × 502+1×50+1, X9Is 1 × 503+1×502+1×50+1, X10Is 2 x 503+1×502+1×50+1, X11Is 4 x 503+1×502+1×50+1, X12Is 5 × 503+1×502+1×50+1, X13Is 1 × 504+2×503+1×502+1×50+1, X14Is 1 × 504+5×503+1×502+1×50+1，X15Is 1 × 505+1×504+2×503+1×502+1×50+1, X16Is 2 x 505+1×504+2×503+1×502+1×50+1，X17Is 1 × 505+1×504+5×503+1×502+1×50+1，X18Is 2 x 505+1×504+5×503+1×502+1×50+1，X20Is 3 × 503+1×502+1×50+1。
Aiming at a mine high-voltage power supply system, a branch node-direct power supply load adjacency list T is established according to a motor load directly controlled by each branch node; through the adjacency list, the basic parameter rated power of the motor directly controlled by the adjacency list can be inquired according to the corresponding branch node number; coal mine high pressure supply as shown in figure 1In an electrical system diagram, the high-voltage outgoing switch branch nodes are numbered as follows: x3Is numbered 1, X4Is numbered 2, X5Is numbered 3, X6Is numbered 4, X9Is numbered 5, X10Number of (1) is 6, X11Is numbered 7, X12Is number 8, X15Is numbered 9, X16Is numbered 10, X17Is number 11, X18Is numbered 12.
And constructing a branch node-high-voltage switch power supply load mapping table TT, wherein in the high-voltage switch power supply load mapping table, the power supply load corresponding to the high-voltage outlet switch can be inquired according to the corresponding branch node number of the high-voltage outlet switch, and under the initial condition, in the high-voltage switch power supply load mapping table TT, the power supply load initial value corresponding to each high-voltage outlet switch branch node is 0.
According to the topology analysis result of the coal mine high-voltage power grid, calculating the power supply load corresponding to each high-voltage outlet switch to complete the statistics of the coal mine high-voltage power grid load, and specifically comprising the following steps:
step 1, adding all high-voltage outgoing line switches in a coal mine high-voltage power supply system into a set Q and a set U;
step 2, taking out a high-voltage outgoing switch A from the set Q, wherein a topology coding result corresponding to the high-voltage outgoing switch is represented by FCode1, and the numerical value of FCode1 is equal to PQ;
step 3, taking out a high-voltage outgoing switch B from the set U, wherein a topological coding result corresponding to the high-voltage outgoing switch is represented by FCode 2;
step 4, dividing by 50 with FCode1, wherein the remainder is represented by V1 and commercial L1; divide by 50 with FCode2, the remainder is denoted by V2, commercial L2; if V1 is equal to V2, perform step 5; if V1 is not equal to V2 and set U is not empty, go to step 3; if V1 is not equal to V2 and set U is empty, go to step 8;
step 5, if L1 is equal to 0, adding a high-voltage outlet switch B into the set QS, and executing step 7; if L1 does not equal 0, go to step 6;
step 6, setting the value of FCode1 to L1, setting the value of FCode2 to L2, and executing step 4;
step 7, if the set U is not empty, setting the value of FCode1 as PQ, and executing step 3; if the set U is empty, executing step 8;
step 8, setting the numerical value of RFH to be 0, taking out a high-voltage outlet switch from the set QS, and executing step 9;
step 9, the taken out high-voltage outgoing line switch is represented by C, a load value FH of direct power supply is searched in a branch node-direct power supply load adjacency list T according to the serial number of the branch node corresponding to the switch C, a numerical value obtained by adding the numerical value of RFH and the numerical value FH is represented by TRFH, the numerical value of RFH is set as TRFH, and the step 10 is executed;
step 10, if the set QS is not empty, taking out the next high-voltage outlet switch from the set QS, and executing step 9; if the set QS is empty, the RFH is the power supply load of the high-voltage outgoing switch A, a power supply load parameter corresponding to the RFH is found in a power supply load mapping table TT between a branch node and the high-voltage switch according to the branch node number corresponding to the high-voltage outgoing switch A, and the value of the power supply load parameter is set to be the RFH; executing the step 11;
step 11, if the set Q is not empty, adding all high-voltage outlet switches in the coal mine high-voltage power supply system into the set U, and executing the step 2; if the set Q is empty, the information stored in the branch node-high voltage switch power supply load mapping table TT is the power supply load corresponding to each high voltage switch.

Claims (2)

1. A coal mine high-voltage power grid load statistical method based on network topology self-learning is characterized in that the described coal mine high-voltage power grid load statistical method comprises the following steps:
step 11, providing a method for calculating the corresponding grade k according to the numerical value of the high-voltage switch topological code;
step 12, carrying out topological coding on all power supply incoming line switches with switch-on states in the coal mine high-voltage power supply system;
step 13, performing topology coding on all other high-voltage switches of which the switch states are closed in the coal mine high-voltage power supply system according to the power supply inlet wire switch subjected to topology coding;
step 14, aiming at a mine high-voltage power supply system, establishing a branch node-direct power supply load adjacency list T according to a motor load directly controlled by each branch node; through the adjacency list, the basic parameter rated power of the motor directly controlled by the adjacency list can be inquired according to the corresponding branch node number;
step 15, constructing a branch node-high voltage switch power supply load mapping table TT, wherein in the high voltage switch power supply load mapping table, the power supply load corresponding to the high voltage outlet switch can be inquired according to the corresponding branch node number of the high voltage outlet switch, and under the initial condition, in the high voltage switch power supply load mapping table TT, the power supply load initial value corresponding to each high voltage outlet switch branch node is 0;
step 16, calculating the power supply load corresponding to each high-voltage outlet switch according to the topology analysis result of the coal mine high-voltage power grid, and completing the load statistics of the coal mine high-voltage power grid;
in step 12, the method specifically includes the following steps:
step 121, nodes corresponding to all outlet switches in the coal mine high-voltage power supply system are branch nodes, and all power supply inlet switches with the switch-on state in the coal mine high-voltage power supply system are added into a set Q1; setting the value of i to 1;
step 122, taking out a power supply incoming line switch from the set Q1, and executing step 123;
step 123, the taken power incoming line switch is represented by SWJ, the topological code corresponding to the power incoming line switch is represented by Jcode, the value of the Jcode is set as i, and the SWJ is added into a set QJ; if the set Q1 is not null, adding 1 to the value of i, executing step 122, if the set Q1 is null, completing the topology coding of the power incoming line switch, and storing the power incoming line switch subjected to the topology coding in a set QJ;
in step 13, the method specifically comprises the following steps:
131, adding all switches in the coal mine high-voltage power supply system into a set UA;
step 132, taking out one switch from the set QJ, and executing step 133;
step 133, the taken out switch is represented by SW1, the corresponding topology Code is represented by Code1, all outgoing switches and interconnection switches with the switch-on state adjacent to SW1 are searched in the set UA, and the searched outgoing switches and interconnection switches are taken out from the set UA and added into the set Q2; setting the value of j to 1; calculating the corresponding grade k according to the value of the topological Code1 of the switch SW 1;
step 134, taking out a switch from the set Q2, which is denoted by SW2, and the corresponding topological Code is denoted by Code2, and setting the value of Code2 as: j 50 xk+ Code 1; if the switch is a tie switch, go to step 135; if the switch is an outgoing switch, go to step 136;
135, searching all outgoing line switches and interconnection switches which are adjacent to the SW2 and have the switch-on states in the set UA, and taking out the searched outgoing line switches and interconnection switches from the set UA and adding the outgoing line switches and interconnection switches into the set Q2; step 137 is executed;
step 136, searching a general incoming line switch SW3 which is adjacent to the SW2 and has a switch-on state in the set UA, wherein a corresponding topology Code is represented by Code3, and calculating a corresponding grade k according to a numerical value of the topology Code2 of the switch SW 2; the value of Code3 is set to: 1*50k+ Code2, taking out the general incoming line switch SW3 with completed topology coding from the set UA and adding into the set QJ, executing step 137;
step 137, if the set Q2 is not empty, adding 1 to the value of j, and executing step 134; if the set Q2 is empty, go to step 138;
step 138, if the set QJ is not empty, taking out a switch from the set QJ, and executing step 133; if the set QJ is empty, the topology encoding is complete.
2. The coal mine high-voltage power grid load statistical method based on network topology self-learning according to claim 1, characterized in that: according to the topology analysis result of the coal mine high-voltage power grid, calculating the power supply load corresponding to each high-voltage outlet switch to complete the statistics of the coal mine high-voltage power grid load, and the method comprises the following steps:
step 21, adding all high-voltage outgoing line switches in the coal mine high-voltage power supply system into the set Q and the set U;
step 22, taking out a high-voltage outgoing switch A from the set Q, wherein the topology coding result corresponding to the high-voltage outgoing switch is represented by FCode1, and the numerical value of FCode1 is equal to PQ;
step 23, taking out a high-voltage outgoing switch B from the set U, wherein a topology coding result corresponding to the high-voltage outgoing switch is represented by FCode 2;
step 24, dividing by 50 with FCode1, wherein the remainder is represented by V1 and commercial L1; divide by 50 with FCode2, the remainder is denoted by V2, commercial L2; if V1 is equal to V2, perform step 25; if V1 is not equal to V2 and set U is not empty, go to step 23; if V1 does not equal V2 and set U is empty, go to step 28;
step 25, if L1 is equal to 0, adding the high-voltage outlet switch B to the set QS, and executing step 27; if L1 does not equal 0, go to step 26;
step 26, setting the value of FCode1 to L1, setting the value of FCode2 to L2, and executing step 24;
step 27, if the set U is not empty, setting the value of FCode1 to PQ, and executing step 23; if the set U is empty, go to step 28;
step 28, setting the value of RFH to 0, taking out a high-voltage outgoing switch from the set QS, and executing step 29;
step 29, the taken out high-voltage outgoing line switch is represented by C, a load value FH of direct power supply is searched in a branch node-direct power supply load adjacency list T according to the serial number of the branch node corresponding to the switch C, a numerical value obtained by adding the numerical value of RFH and the numerical value of FH is represented by TRFH, the numerical value of RFH is set as TRFH, and the step 2A is executed;
step 2A, if the set QS is not empty, taking out the next high-voltage outlet switch from the set QS, and executing step 29; if the set QS is empty, the RFH is the power supply load of the high-voltage outgoing switch A, a power supply load parameter corresponding to the RFH is found in a power supply load mapping table TT between a branch node and the high-voltage switch according to the branch node number corresponding to the high-voltage outgoing switch A, and the value of the power supply load parameter is set to be the RFH; executing the step 2B;
step 2B, if the set Q is not empty, adding all high-voltage outgoing line switches in the coal mine high-voltage power supply system into the set U, and executing step 22; if the set Q is empty, the information stored in the branch node-high voltage switch power supply load mapping table TT is the power supply load corresponding to each high voltage switch.
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