CN111521888B - High-voltage station bus power supply phase checking system and method - Google Patents
High-voltage station bus power supply phase checking system and method Download PDFInfo
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- CN111521888B CN111521888B CN202010379073.1A CN202010379073A CN111521888B CN 111521888 B CN111521888 B CN 111521888B CN 202010379073 A CN202010379073 A CN 202010379073A CN 111521888 B CN111521888 B CN 111521888B
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Abstract
The invention discloses a high-voltage station bus power supply nuclear phase system and a method, which comprises a diesel generator set, a low-voltage station transformer unit, a high-voltage station bus unit, a standby power supply incoming line unit, a working power supply incoming line unit, a standby power supply incoming line closed bus fracture, a working power supply incoming line closed bus fracture, a standby power supply unit, a working power supply unit and a booster station bus; the system and the method can utilize the diesel generating set to complete high-voltage station bus power supply nuclear phase work, and have high universality and safety.
Description
Technical Field
The invention belongs to the technical field of power debugging and power testing, and relates to a high-voltage station bus power supply phase checking system and method.
Background
The high-voltage station bus power supply is a powerful guarantee for stable operation and safe shutdown of the unit. Two power supplies are usually configured on a high-voltage station bus, two power supplies can be switched in two directions through a quick switching device, and the two power supplies are required to be ensured to be in the same phase before the power supplies are switched. The conventional high-voltage station bus power supply phase checking method comprises two methods, wherein the first method is to perform primary phase checking on the upper opening and the lower opening of a service inlet switch of a high-voltage station bus working power supply under the condition that a high-voltage station transformer, a high-voltage standby transformer and a high-voltage station bus are all electrified, the method needs to perform measurement on the primary side, and is high in working strength and poor in safety; the second method is that a fracture is reserved on an upper opening of a high-voltage station bus working power supply incoming line switch, a high-voltage standby transformer, a high-voltage station bus standby power supply incoming line voltage transformer, a high-voltage station bus voltage transformer and a high-voltage station bus working power supply incoming line voltage transformer are sequentially electrified, and secondary phase checking is carried out under the same power supply system. The two nuclear phase methods need to receive power from a power grid side for a high-voltage standby transformer or a high-voltage station transformer, and are high in working strength and long in time span. Therefore, the finding of a novel high-voltage station bus power supply phase checking system and method is of great significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-voltage station bus power supply phase checking system and method, the system and method can utilize a diesel generator set to complete the phase checking work of the high-voltage station bus power supply, and the universality and the safety are higher.
In order to achieve the purpose, the nuclear phase system of the high-voltage station bus power supply comprises a diesel generator set, a low-voltage station transformer unit, a high-voltage station bus unit, a standby power supply incoming line unit, a working power supply incoming line unit, a standby power supply incoming line closed bus fracture, a working power supply incoming line closed bus fracture, a standby power supply unit, a working power supply unit and a booster station bus;
the diesel generating set is connected with a high-voltage station bus unit through a low-voltage station transformer unit, the high-voltage station bus unit is connected with a booster station bus through a working power supply inlet wire unit, a working power supply inlet wire closed bus fracture and the working power supply unit, and the high-voltage station bus unit is connected with the booster station bus through a standby power supply inlet wire unit, a standby power supply inlet wire closed bus fracture and the standby power supply unit.
The low-voltage station transformer unit comprises a low-voltage station transformer, a low-voltage side switch of the low-voltage station transformer and a high-voltage side switch of the low-voltage station transformer; the high-voltage station bus unit comprises a high-voltage station bus and a high-voltage station bus voltage transformer;
the diesel generating set is connected with a high-voltage station bus through a low-voltage station transformer low-voltage side switch, a low-voltage station transformer and a low-voltage station transformer high-voltage side switch, and the high-voltage station bus voltage transformer is arranged on the high-voltage station bus.
The standby power supply incoming line unit comprises a standby power supply incoming line switch and a standby power supply incoming line voltage transformer, and the working power supply incoming line unit comprises a working power supply incoming line switch and a working power supply incoming line voltage transformer;
the standby power supply incoming line closed bus fracture is connected with a high-voltage station bus through a standby power supply incoming line switch, and a standby power supply incoming line voltage transformer is installed on a line between the standby power supply incoming line closed bus fracture and the standby power supply incoming line switch;
the working power supply incoming line closed bus fracture is connected with a high-voltage station bus through a working power supply incoming line switch, and the working power supply incoming line voltage transformer is installed on a line between the working power supply incoming line closed bus fracture and the working power supply incoming line switch.
The standby power supply unit comprises a high-voltage standby transformer and a power supply side switch of the high-voltage standby transformer; the break of the closed bus of the inlet wire of the standby power supply is connected with the bus of the booster station through the high-voltage standby transformer and a power supply side switch of the high-voltage standby transformer.
The working power supply unit comprises a generator, a generator outlet switch, a main transformer and a high-voltage station transformer;
the booster station bus is connected with the generator through the main transformer and the generator outlet switch, the low-voltage side of the high-voltage station transformer is connected with a fracture of the working power supply inlet wire closed bus, and the high-voltage side of the high-voltage station transformer is connected with a line between the main transformer and the generator outlet switch.
The main transformer winding group is Yd 11; the winding group of the high-voltage station transformer is Dy 1; the high-voltage standby transformer winding group is Yy 12.
The invention relates to a high-voltage station bus power supply phase checking method, which comprises the following steps:
1) carrying out nuclear phase early-stage preparation work of a high-station bus power supply;
2) starting a diesel generating set;
3) measuring the voltage amplitude and the phase sequence of the diesel generator set end, and when the voltage amplitude of the diesel generator set end is the rated voltage amplitude and the phase sequence is the positive phase sequence, turning to the step 4), otherwise, turning to the step 5);
4) closing a low-voltage side switch of the low-voltage station transformer, performing an impact test on the low-voltage station transformer, and turning to the step 6);
5) stopping the diesel generator set, checking and eliminating defects, and turning to the step 2);
6) checking whether the low-voltage station transformer operates normally, and if so, turning to the step 7), otherwise, turning to the step 8);
7) closing a high-voltage side switch of the low-voltage station transformer, performing an impact test on a high-voltage station bus, and turning to the step 9);
8) disconnecting the low-voltage side switch of the low-voltage station transformer, checking and eliminating defects, and then turning to the step 4);
9) checking the secondary voltage amplitude and the phase sequence of the high-voltage station bus voltage transformer, and when the secondary voltage amplitude of the high-voltage station bus voltage transformer is consistent with a theoretical calculated value and the phase sequence is a positive phase sequence, turning to the step 10), otherwise, turning to the step 11);
10) closing the inlet wire switch of the standby power supply, performing impact test on the inlet wire voltage transformer of the standby power supply, and turning to the step 12);
11) disconnecting a high-voltage side switch of the low-voltage station transformer, checking and eliminating defects, and then turning to the step 7);
12) checking the amplitude and the phase sequence of the secondary voltage of the standby power supply incoming line voltage transformer, and when the amplitude of the secondary voltage of the standby power supply incoming line voltage transformer is consistent with a theoretical calculation value and the phase sequence is positive phase sequence, turning to the step 13), otherwise, turning to the step 14);
13) closing a working power supply inlet wire switch, performing an impact test on a working power supply inlet wire voltage transformer, and turning to the step 15);
14) disconnecting the inlet switch of the standby power supply, checking and eliminating defects, and turning to the step 10);
15) checking the secondary voltage amplitude and the phase sequence of the working power supply incoming line voltage transformer, and when the voltage amplitude of the working power supply incoming line voltage transformer is consistent with a theoretical calculation value and the phase sequence is a positive phase sequence, turning to the step 16), otherwise, turning to the step 17);
16) performing secondary homologous nuclear phase on the standby power supply incoming line voltage transformer, the working power supply incoming line voltage transformer and the high voltage station bus voltage transformer, and then turning to the step 18);
17) disconnecting the working power supply incoming line switch, checking and eliminating defects, and then turning to step 13);
18) judging whether the secondary voltage of the standby power supply incoming line voltage transformer, the secondary voltage of the working power supply incoming line voltage transformer and the secondary voltage of the high-voltage station bus voltage transformer are in the same phase, and turning to the step 20) when the secondary voltage of the standby power supply incoming line voltage transformer, the secondary voltage of the working power supply incoming line voltage transformer and the secondary voltage of the high-voltage station bus voltage transformer are in the same phase, or turning to the step 19);
19) disconnecting the standby power supply incoming line switch and the working power supply incoming line switch, checking and eliminating defects, and turning to the step 10);
20) and finishing the nuclear phase of the bus power supply for the high-voltage plant.
The specific operation of the step 1) is as follows:
the installation and debugging work of the diesel generator set, the low-voltage station transformer unit, the high-voltage station bus unit, the standby power incoming line unit and the working power incoming line unit is completed, so that the diesel generator set has power transmission conditions;
and the fracture of the closed bus of the inlet wire of the standby power supply and the fracture of the closed bus of the inlet wire of the working power supply are ensured to keep a preset safety distance.
And 6), judging whether the low-voltage station transformer normally operates according to the operation sound of the low-voltage station transformer after being electrified and the voltage amplitude and the phase sequence of the high-voltage side and the low-voltage side of the low-voltage station transformer.
The invention has the following beneficial effects:
the high-voltage plant bus power supply nuclear phase system and the method thereof perform impact test on a low-voltage plant transformer, a high-voltage plant bus voltage transformer, a standby power supply incoming line voltage transformer and a working power supply incoming line voltage transformer in sequence through a diesel generating set during specific operation, perform homologous nuclear phase work on the high-voltage plant bus voltage transformer, the standby power supply incoming line voltage transformer and the working power supply incoming line voltage transformer under the condition of the same power supply system, do not need to perform nuclear phase on a primary side, have small working strength and high safety and stability, and need to be explained that during specific operation, a high-voltage standby transformer does not need to be subjected to power receiving work, a tester can finish the nuclear phase work of the high-voltage plant bus power supply before the power plant is fed back for the first time, find existing problems in time and have strong practicability, the device is suitable for generator sets of different types and is convenient to popularize and use on site.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a flow chart of the present invention.
Wherein, 1 is a diesel generator set, 2 is a low-voltage station transformer unit, 3 is a high-voltage station bus unit, 4 is a standby power incoming line unit, 5 is a standby power incoming line closed bus fracture, 6 is a standby power unit, 7 is a working power incoming line unit, 8 is a working power incoming line closed bus fracture, 9 is a working power unit, 10 is a booster station bus, 2-1 is a low-voltage side switch of a low-voltage station transformer, 2-2 is a low-voltage station transformer, 2-3 is a high-voltage side switch of a low-voltage station transformer, 3-1 is a high-voltage station bus voltage transformer, 3-2 is a high-voltage station bus, 4-1 is a standby power incoming line switch, 4-2 is a standby power incoming line voltage transformer, 7-1 is a working power incoming line switch, 7-2 is a working power incoming line voltage transformer, 6-1 is a high-voltage standby transformer, 6-2 is a power supply side switch of the high-voltage standby transformer, 9-1 is a high-voltage service transformer, 9-2 is a main transformer, 9-3 is a generator outlet switch, and 9-4 is a generator.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the high-voltage station bus power supply nuclear phase system according to the present invention includes a diesel generator set 1, a low-voltage station transformer unit 2, a high-voltage station bus unit 3, a standby power incoming line unit 4, a working power incoming line unit 7, a standby power incoming line closed bus fracture 5, a working power incoming line closed bus fracture 8, a standby power unit 6, a working power unit 9, and a booster station bus 10; the diesel generating set 1 is connected with a high-voltage station bus unit 3 through a low-voltage station transformer unit 2, the high-voltage station bus unit 3 is connected with a booster station bus 10 through a working power supply incoming line unit 7, a working power supply incoming line closed bus fracture 8 and a working power supply unit 9, and the high-voltage station bus unit 3 is connected with the booster station bus 10 through a standby power supply incoming line unit 4, a standby power supply incoming line closed bus fracture 5 and a standby power supply unit 6.
The low-voltage station transformer unit 2 comprises a low-voltage station transformer 2-2, a low-voltage side switch 2-1 of the low-voltage station transformer and a high-voltage side switch 2-3 of the low-voltage station transformer; the high-voltage station bus unit 3 comprises a high-voltage station bus 3-2 and a high-voltage station bus voltage transformer 3-1; the diesel generating set 1 is connected with a high-voltage station bus 3-2 through a low-voltage station transformer low-voltage side switch 2-1, a low-voltage station transformer 2-2 and a low-voltage station transformer high-voltage side switch 2-3, and the high-voltage station bus voltage transformer 3-1 is installed on the high-voltage station bus 3-2.
The standby power supply incoming line unit 4 comprises a standby power supply incoming line switch 4-1 and a standby power supply incoming line voltage transformer 4-2, and the working power supply incoming line unit 7 comprises a working power supply incoming line switch 7-1 and a working power supply incoming line voltage transformer 7-2; a standby power supply incoming line closed bus fracture 5 is connected with a high-voltage station bus 3-2 through a standby power supply incoming line switch 4-1, and a standby power supply incoming line voltage transformer 4-2 is installed on a line between the standby power supply incoming line closed bus fracture 5 and the standby power supply incoming line switch 4-1; the working power supply incoming line closed bus fracture 8 is connected with a high-voltage station bus 3-2 through a working power supply incoming line switch 7-1, and the working power supply incoming line voltage transformer 7-2 is installed on a line between the working power supply incoming line closed bus fracture 8 and the working power supply incoming line switch 7-1.
The standby power supply unit 6 comprises a high-voltage standby transformer 6-1 and a high-voltage standby transformer power supply side switch 6-2; the break 5 of the closed bus of the inlet wire of the standby power supply is connected with a bus 10 of the booster station through a high-voltage standby transformer 6-1 and a power side switch 6-2 of the high-voltage standby transformer.
The working power supply unit 9 comprises a generator 9-4, a generator outlet switch 9-3, a main transformer 9-2 and a high-voltage station transformer 9-1; a booster station bus 10 is connected with a generator 9-4 through a main transformer 9-2 and a generator outlet switch 9-3, the low-voltage side of a high-voltage station transformer 9-1 is connected with a work power supply inlet wire closed bus fracture 8, and the high-voltage side of the high-voltage station transformer 9-1 is connected with a line between the main transformer 9-2 and the generator outlet switch 9-3; the winding group of the main transformer 9-2 is Yd 11; the winding group of the high-voltage station transformer 9-1 is Dy 1; the winding group of the high-voltage standby transformer 6-1 is Yy 12.
Referring to fig. 2, the phase checking method for the high-voltage station bus power supply according to the present invention includes the following steps:
1) carrying out nuclear phase early-stage preparation work of a high-station bus power supply;
2) starting a diesel generating set 1;
3) measuring the voltage amplitude and the phase sequence of the end of the diesel generator set 1, and when the voltage amplitude of the end of the diesel generator set 1 is the rated voltage amplitude and the phase sequence is a positive phase sequence, turning to the step 4), otherwise, turning to the step 5);
4) closing a low-voltage side switch 2-1 of the low-voltage station transformer, performing an impact test on the low-voltage station transformer 2-2, and turning to the step 6);
5) stopping the diesel generator set 1, checking and eliminating defects, and then turning to the step 2);
6) checking whether the low-voltage station transformer 2-2 operates normally, and when the low-voltage station transformer 2-2 operates normally, turning to the step 7), otherwise, turning to the step 8);
7) closing a high-voltage side switch 2-3 of the low-voltage station transformer, performing an impact test on the high-voltage station bus 3-2, and turning to the step 9);
8) disconnecting the low-voltage side switch 2-1 of the low-voltage station transformer, checking and eliminating defects, and then turning to the step 4);
9) checking the secondary voltage amplitude and the phase sequence of the bus voltage transformer 3-1 for the high-voltage plant, and when the secondary voltage amplitude of the bus voltage transformer 3-1 for the high-voltage plant is consistent with a theoretical calculated value and the phase sequence is a positive phase sequence, turning to the step 10), otherwise, turning to the step 11);
10) closing the inlet switch 4-1 of the standby power supply, performing an impact test on the inlet voltage transformer 4-2 of the standby power supply, and turning to the step 12);
11) disconnecting the high-voltage side switch 2-3 of the low-voltage station transformer, checking and eliminating defects, and then turning to the step 7);
12) checking the amplitude and the phase sequence of the secondary voltage of the standby power supply incoming line voltage transformer 4-2, and when the amplitude of the secondary voltage of the standby power supply incoming line voltage transformer 4-2 is consistent with a theoretical calculation value and the phase sequence is positive phase sequence, turning to the step 13), otherwise, turning to the step 14);
13) closing the working power supply inlet wire switch 7-1, performing an impact test on the working power supply inlet wire voltage transformer 7-2, and turning to the step 15);
14) disconnecting the inlet switch 4-1 of the standby power supply, checking and eliminating defects, and then turning to the step 10);
15) checking the secondary voltage amplitude and the phase sequence of the working power supply incoming line voltage transformer 7-2, and when the voltage amplitude of the working power supply incoming line voltage transformer 7-2 is consistent with the theoretical calculated value and the phase sequence is positive phase sequence, turning to the step 16), otherwise, turning to the step 17);
16) performing secondary homologous nuclear phase on the standby power supply incoming line voltage transformer 4-2, the working power supply incoming line voltage transformer 7-2 and the high voltage station bus voltage transformer 3-1, and then turning to the step 18);
17) disconnecting the working power supply incoming line switch 7-1, checking and eliminating defects, and then turning to the step 13);
18) judging whether the secondary voltage of the standby power supply incoming line voltage transformer 4-2, the secondary voltage of the working power supply incoming line voltage transformer 7-2 and the secondary voltage of the high-voltage station bus voltage transformer 3-1 are in the same phase or not, and turning to the step 20) when the secondary voltage of the standby power supply incoming line voltage transformer 4-2, the secondary voltage of the working power supply incoming line voltage transformer 7-2 and the secondary voltage of the high-voltage station bus voltage transformer 3-1 are in the same phase, or turning to the step 19);
19) disconnecting the standby power supply incoming line switch 4-1 and the working power supply incoming line switch 7-1, checking and eliminating defects, and then turning to the step 10);
20) and finishing the nuclear phase of the bus power supply for the high-voltage plant.
The specific operation of the step 1) is as follows: the installation and debugging work of the diesel generator set 1, the low-voltage station transformer unit 2, the high-voltage station bus unit 3, the standby power incoming line unit 4 and the working power incoming line unit 7 is completed, so that the diesel generator set has power transmission conditions; and the standby power supply inlet wire closed bus fracture 5 and the working power supply inlet wire closed bus fracture 8 are ensured to keep a preset safety distance.
And 6), judging whether the low-voltage station transformer 2-2 normally operates according to the operation sound of the electrified low-voltage station transformer 2-2 and the voltage amplitude and the phase sequence of the high-voltage side and the low-voltage side of the low-voltage station transformer 2-2.
Claims (4)
1. A high-voltage station bus power supply nuclear phase method is characterized by being based on a high-voltage station bus power supply nuclear phase system and the high-voltage station bus power supply nuclear phase system and characterized by comprising a diesel generating set (1), a low-voltage station transformer unit (2), a high-voltage station bus unit (3), a standby power supply incoming line unit (4), a working power supply incoming line unit (7), a standby power supply incoming line closed bus fracture (5), a working power supply incoming line closed bus fracture (8), a standby power supply unit (6), a working power supply unit (9) and a booster station bus (10);
the high-voltage station bus unit (3) is connected with a booster station bus (10) through a working power supply incoming line unit (7), a working power supply incoming line closed bus fracture (8) and a working power supply unit (9), and the high-voltage station bus unit (3) is connected with the booster station bus (10) through a standby power supply incoming line unit (4), a standby power supply incoming line closed bus fracture (5) and a standby power supply unit (6);
the low-voltage station transformer unit (2) comprises a low-voltage station transformer (2-2), a low-voltage side switch (2-1) of the low-voltage station transformer and a high-voltage side switch (2-3) of the low-voltage station transformer; the high-voltage station bus unit (3) comprises a high-voltage station bus (3-2) and a high-voltage station bus voltage transformer (3-1);
the diesel generator set (1) is connected with a high-voltage station bus (3-2) through a low-voltage station transformer low-voltage side switch (2-1), a low-voltage station transformer (2-2) and a low-voltage station transformer high-voltage side switch (2-3), and the high-voltage station bus voltage transformer (3-1) is installed on the high-voltage station bus (3-2);
the standby power supply incoming line unit (4) comprises a standby power supply incoming line switch (4-1) and a standby power supply incoming line voltage transformer (4-2), and the working power supply incoming line unit (7) comprises a working power supply incoming line switch (7-1) and a working power supply incoming line voltage transformer (7-2);
a standby power supply incoming line closed bus fracture (5) is connected with a high-voltage station bus (3-2) through a standby power supply incoming line switch (4-1), and a standby power supply incoming line voltage transformer (4-2) is installed on a line between the standby power supply incoming line closed bus fracture (5) and the standby power supply incoming line switch (4-1);
a working power supply incoming line closed bus fracture (8) is connected with a high-voltage plant bus (3-2) through a working power supply incoming line switch (7-1), and a working power supply incoming line voltage transformer (7-2) is installed on a line between the working power supply incoming line closed bus fracture (8) and the working power supply incoming line switch (7-1);
the standby power supply unit (6) comprises a high-voltage standby transformer (6-1) and a high-voltage standby transformer power supply side switch (6-2); the standby power supply incoming line closed bus fracture (5) is connected with a booster station bus (10) through a high-voltage standby transformer (6-1) and a high-voltage standby transformer power supply side switch (6-2);
the working power supply unit (9) comprises a generator (9-4), a generator outlet switch (9-3), a main transformer (9-2) and a high-voltage station transformer (9-1);
a booster station bus (10) is connected with a generator (9-4) through a main transformer (9-2) and a generator outlet switch (9-3), the low-voltage side of a high-voltage station transformer (9-1) is connected with a closed bus fracture (8) of a working power supply inlet wire, and the high-voltage side of the high-voltage station transformer (9-1) is connected with a line between the main transformer (9-2) and the generator outlet switch (9-3);
the method comprises the following steps:
1) carrying out nuclear phase early-stage preparation work of a high-station bus power supply;
2) starting a diesel generating set (1);
3) measuring the voltage amplitude and the phase sequence of the end of the diesel generator set (1), and when the voltage amplitude of the end of the diesel generator set (1) is the rated voltage amplitude and the phase sequence is the positive phase sequence, turning to the step 4), otherwise, turning to the step 5);
4) closing a low-voltage side switch (2-1) of the low-voltage station transformer, performing an impact test on the low-voltage station transformer (2-2), and turning to the step 6);
5) stopping the diesel generator set (1), checking and eliminating defects, and turning to the step 2);
6) checking whether the low-voltage station transformer (2-2) operates normally, and if so, turning to the step 7, otherwise, turning to the step 8;
7) closing a high-voltage side switch (2-3) of the low-voltage station transformer, performing an impact test on the high-voltage station bus (3-2), and turning to the step 9);
8) disconnecting the low-voltage side switch (2-1) of the low-voltage station transformer, checking and eliminating defects, and then turning to the step 4);
9) checking the secondary voltage amplitude and the phase sequence of the high-voltage station bus voltage transformer (3-1), and when the secondary voltage amplitude of the high-voltage station bus voltage transformer (3-1) is consistent with a theoretical calculation value and the phase sequence is a positive phase sequence, turning to the step 10), otherwise, turning to the step 11);
10) closing the inlet wire switch (4-1) of the standby power supply, performing impact test on the inlet wire voltage transformer (4-2) of the standby power supply, and turning to the step 12);
11) disconnecting the high-voltage side switch (2-3) of the low-voltage station transformer, checking and eliminating defects, and then turning to the step 7);
12) checking the amplitude and the phase sequence of the secondary voltage of the standby power supply incoming line voltage transformer (4-2), and when the amplitude of the secondary voltage of the standby power supply incoming line voltage transformer (4-2) is consistent with a theoretical calculation value and the phase sequence is positive phase sequence, turning to the step 13), otherwise, turning to the step 14);
13) closing the working power supply incoming line switch (7-1), performing an impact test on the working power supply incoming line voltage transformer (7-2), and turning to the step 15;
14) disconnecting the inlet switch (4-1) of the standby power supply, checking and eliminating defects, and then turning to the step 10);
15) checking the secondary voltage amplitude and the phase sequence of the working power supply incoming line voltage transformer (7-2), and when the voltage amplitude of the working power supply incoming line voltage transformer (7-2) is consistent with a theoretical calculation value and the phase sequence is a positive phase sequence, turning to the step 16), otherwise, turning to the step 17);
16) performing secondary homologous nuclear phase on a standby power supply incoming line voltage transformer (4-2), a working power supply incoming line voltage transformer (7-2) and a high-voltage station bus voltage transformer (3-1), and then turning to step 18);
17) disconnecting the working power supply incoming line switch (7-1), checking and eliminating defects, and then turning to the step 13);
18) judging whether the secondary voltage of the standby power supply incoming line voltage transformer (4-2), the secondary voltage of the working power supply incoming line voltage transformer (7-2) and the secondary voltage of the high-voltage station bus voltage transformer (3-1) are in the same phase or not, when the secondary voltage of the standby power supply incoming line voltage transformer (4-2), the secondary voltage of the working power supply incoming line voltage transformer (7-2) and the secondary voltage of the high-voltage station bus voltage transformer (3-1) are in the same phase, turning to the step 20), and otherwise, turning to the step 19;
19) disconnecting the standby power supply incoming line switch (4-1) and the working power supply incoming line switch (7-1), checking and eliminating defects, and turning to the step 10;
20) and finishing the nuclear phase of the bus power supply for the high-voltage plant.
2. The method for checking the phase of the bus power supply for the high-voltage plant according to claim 1, wherein the specific operation of the step 1) is as follows:
the installation and debugging work of the diesel generator set (1), the low-voltage station transformer unit (2), the high-voltage station bus unit (3), the standby power incoming line unit (4) and the working power incoming line unit (7) is completed, so that the diesel generator set has power transmission conditions;
and the standby power supply inlet wire closed bus fracture (5) and the working power supply inlet wire closed bus fracture (8) are ensured to keep a preset safety distance.
3. The high-voltage station bus power supply phase checking method according to claim 1, wherein in the step 6), whether the low-voltage station transformer (2-2) operates normally is judged according to operation sound of the low-voltage station transformer (2-2) after being electrified and voltage amplitude and phase sequence of the high-voltage side and the low-voltage side of the low-voltage station transformer (2-2).
4. The method for phasing the power supply of the high-voltage bus bar for the plant according to claim 1, wherein the winding set of the main transformer (9-2) is Yd 11; the winding group of the high-voltage station transformer (9-1) is Dy 1; the winding group of the high-voltage standby transformer (6-1) is Yy 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010379073.1A CN111521888B (en) | 2020-05-07 | 2020-05-07 | High-voltage station bus power supply phase checking system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010379073.1A CN111521888B (en) | 2020-05-07 | 2020-05-07 | High-voltage station bus power supply phase checking system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111521888A CN111521888A (en) | 2020-08-11 |
| CN111521888B true CN111521888B (en) | 2022-07-08 |
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