CN217769492U - Power plant station service power system connected to public load - Google Patents
Power plant station service power system connected to public load Download PDFInfo
- Publication number
- CN217769492U CN217769492U CN202221535745.4U CN202221535745U CN217769492U CN 217769492 U CN217769492 U CN 217769492U CN 202221535745 U CN202221535745 U CN 202221535745U CN 217769492 U CN217769492 U CN 217769492U
- Authority
- CN
- China
- Prior art keywords
- transformer
- voltage
- generator
- load
- service
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses an access public load's power plant station service electrical system, including 220kV high-voltage bus, #1 main transformer, #1 generator, #1 high-voltage station transformer, 6kV 1A section station service bus, #2 main transformer, #2 generator, #2 high-voltage station transformer, 6kV 2A section station service bus, step-down transformer and public load. The utility model discloses all insert a single-pole double-throw isolator with the service power of two generators, be qualified for the next round of competitions by single-pole double-throw isolator and insert service power utility load. The utility power public load can select the circuit to be switched on by switching the position of the switch of the single-pole double-throw isolating switch, so that the power supply of a #1 power generation station system or the power supply of a #2 power generation station system is selected, the investment cost of the circuit is greatly reduced, the resource waste is avoided, meanwhile, the incoming wires at two sides can not be switched on simultaneously by utilizing the natural characteristic of the single-pole double-throw isolating switch, the loop closing operation of two power generators is effectively avoided, and the safety of the unit is improved.
Description
Technical Field
The utility model belongs to power plant station service field, concretely relates to insert public load's power plant station service electrical system.
Background
With the continuous rising of energy price, the power generation cost of the thermal power plant rises year by year, and in order to improve the benefit of the traditional thermal power generating unit and realize the multi-utilization of energy of the thermal power plant, more and more public loads, such as a back pressure generator system, a battery energy storage system, a molten salt heat storage system, an electrode boiler system, an air compressor system and the like are connected to a plant power system of the power plant. By means of energy gradient utilization, the frequency modulation and peak regulation capacity of the unit is enhanced, and industrial steam or compressed air is supplied to the outside, more benefits are created for the traditional thermal power generating unit.
In the prior art, a public load of a thermal power plant is respectively connected to 6kV station power buses of two generator sets, the public load is connected with a 6kV public load section bus through a step-down transformer, the 6kV public load section bus is connected to a 6kV 1A station power bus through a #1 line, and the 6kV 1A station power bus is connected to an outlet of a #1 generator through a #1 high-voltage station power transformer; the 6kV public load section bus is connected to a 6kV 2A section of service bus through a #2 line, and the 6kV 2A section of service bus is connected to an outlet of a #2 generator through a #2 high-voltage service transformer; when the system normally operates, the utility load is supplied with power by the #1 generator through the #1 high-voltage station transformer and the #1 line or supplied with power by the #2 generator through the #2 high-voltage station transformer and the #2 line, and the wiring diagram of the system is shown in fig. 1.
If the utility power system adopting the connection mode is large in public load power and the installation position is far away from the 6kV utility bus, the line investment cost is greatly increased, only one line can run in the line # 1 and the line # 2, so that the resource waste is caused, and meanwhile, the two lines can cause the loop closing operation of the two generators through the utility power system due to the switch locking logic failure and the operation error, so that the accidents such as trip and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power plant service power system who inserts utility load to service power utility load.
The utility model discloses a following technical scheme realizes:
a power plant service electric system accessed to a public load comprises a 220kV high-voltage bus, a #1 main transformer, a #1 generator, a #1 high-voltage service transformer, a 6kV 1A section of service bus, a #2 main transformer, a #2 generator, a #2 high-voltage service transformer, a 6kV 2A section of service bus, a step-down transformer and a public load;
the outlet of a #1 generator is connected with the low-voltage side of a #1 main transformer and the high-voltage side of a #1 high-voltage station transformer, the high-voltage side of the #1 main transformer is connected with a 220kV high-voltage bus through a first circuit breaker switch, the low-voltage side of the #1 high-voltage station transformer is connected with a 6kV 1A section of station bus through a second circuit breaker switch, the 6kV 1A section of station bus is connected with a first inlet wire of a single-pole double-throw type isolating switch through a third circuit breaker switch, the outlet of a #2 generator is connected with the low-voltage side of a #2 main transformer and the high-voltage side of the #2 high-voltage station transformer, the high-voltage side of the #2 main transformer is connected with the 220kV high-voltage bus through a fourth circuit breaker switch, the low-voltage side of the #2 high-voltage station transformer is connected with the 6kV 2A section of station bus, the 6kV 2A section of station bus is connected with a second inlet wire of the single-pole double-throw type isolating switch through a sixth circuit breaker switch, the outlet wire side of the single-pole double-throw type isolating switch is connected with a seventh circuit breaker and the high-voltage-reducing transformer, and the low-voltage side of the single-pole double-throw type isolating switch is connected with a public load switch through an eighth circuit breaker.
The utility model discloses further improvement lies in, when public load was supplied power by #1 generator, the first inlet wire position of single-pole double-throw type isolator was put through, #1 generator was supplied power for public load through #1 high-pressure station transformer, second circuit breaker switch, 6kV 1A section station service generating line, third circuit breaker switch, single-pole double-throw type isolator, seventh circuit breaker switch and step-down transformer.
The utility model discloses further improvement lies in, when public load was supplied power by the #2 generator, single-pole double-throw type isolator second inlet wire position was put through, #2 generator was supplied power for public load through #2 high-voltage station transformer, fifth circuit breaker switch, 6kV 2A section station power bus, sixth circuit breaker switch, single-pole double-throw type isolator, seventh circuit breaker switch and step-down transformer.
The utility model discloses further improvement lies in, two generators all can be to the public load power supply, when the #1 generator breaks down or shuts down the maintenance, the #2 generator is the public load power supply, when the #2 generator breaks down or shuts down the maintenance, the #1 generator is the public load power supply.
The utility model discloses further improvement lies in, the first inlet wire position of single-pole double-throw type isolator alternative switch-on or second inlet wire position.
The utility model is further improved in that the public load refers to the load of the service power of the two generators.
The utility model discloses further improvement lies in, and the load is backpressure generator system, battery energy storage system, fused salt heat-retaining system, electrode boiler system or air compressor machine system.
The utility model discloses at least, following profitable technological effect has:
the utility power public load of the existing system is supplied by two power supply lines, if the power of the public load is high, the installation position is far away from a 6kV service bus, the investment cost of the lines is greatly increased, only one line can run in the line # 1 and the line # 2, the waste of resources is caused, and meanwhile, the two lines can cause the closed loop operation of two generators through a service power system due to the switch locking logic failure and the operation error, so that accidents such as trip and the like are caused. The utility model provides a pair of insert utility load's power plant house service electrical system all inserts a single-pole double-throw isolator with the house service of two generators, is qualified for the next round of competitions by single-pole double-throw isolator and inserts house service utility load again. The utility power public load can select the circuit to be switched on by switching the position of the switch of the single-pole double-throw isolating switch, so that the power supply of a #1 power generation station system or the power supply of a #2 power generation station system is selected, the investment cost of the circuit is greatly reduced, the resource waste is avoided, meanwhile, the incoming wires at two sides can not be switched on simultaneously by utilizing the natural characteristic of the single-pole double-throw isolating switch, the loop closing operation of two power generators is effectively avoided, and the safety of the unit is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art system.
Fig. 2 is a schematic diagram of a modified system.
FIG. 3 is a schematic diagram of a system in which #1 generator supplies power to a utility load.
Fig. 4 is a schematic diagram of a system in which #2 generator supplies power to a utility load.
Fig. 5 is a schematic diagram of a system in which the utility load is shut down.
Description of the reference numerals:
1-220kV high-voltage bus, 2- #1 main transformer, 3- #1 generator, 4- #1 high-voltage station transformer, 5-6 kV 1A section station bus, 6- #2 main transformer, 7- #2 generator, 8- #2 high-voltage station transformer, 9-6 kV 2A section station bus, 10-step-down transformer, 11-public load;
101-a first breaker switch, 102-a fourth breaker switch, 201-a second breaker switch, 202-a fifth breaker switch, 203-a third breaker switch, 204-a sixth breaker switch, 205-a single pole double throw type disconnector, 206-a seventh breaker switch, 301-an eighth breaker switch.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 2, the utility model provides a power plant service electric system accessing public load, which comprises a 220kV high voltage bus 1, a #1 main transformer 2, a #1 generator 3, a #1 high voltage service transformer 4, a 6kV 1A section of service bus 5, a #2 main transformer 6, a #2 generator 7, a #2 high voltage service transformer 8, a 6kV 2A section of service bus 9, a step-down transformer 10 and a public load 11; the outlet of a #1 generator 3 is connected with the low-voltage side of a #1 main transformer 2 and the high-voltage side of a #1 high-voltage station transformer 4, the high-voltage side of the #1 main transformer 2 is connected with a 220kV high-voltage bus 1 through a first circuit breaker switch 101, the low-voltage side of the #1 high-voltage station transformer 4 is connected with a 6kV 1A section of station bus 5 through a second circuit breaker switch 201, the 6kV 1A section of station bus 5 is connected with a first wire inlet of a single-pole double-throw type isolating switch 205 through a third circuit breaker switch 203, the outlet of a #2 generator 7 is connected with the low-voltage side of the #2 main transformer 6 and the high-voltage side of a #2 high-voltage station transformer 8, the high-voltage side of the #2 main transformer 6 is connected with the 220kV high-voltage bus 1 through a fourth circuit breaker switch 102, the low-voltage side of the #2 high-voltage station transformer 8 is connected with a 6kV 2A section of station bus 9 through a fifth circuit breaker switch 202, the 6kV 2A section of station bus 9 is connected with a 6kV 2A section of station bus, the 6kV 2A section of station bus 9 is connected with a single-pole double-throw type isolating switch 205 through a sixth circuit breaker switch 204 and a high-pole double-pole switch, the high-pole double-pole switch 205 is connected with a high-pole load bus 301, the high-pole double-pole switch 11, and a load-pole switch 11, and a switch 11 is connected with a high-pole switch 11, and a load-pole double-pole switch 301, and a load-pole double-pole switch 11, and a load switch 11.
The single-pole double-throw type isolating switch 205 is selected to be switched on the first inlet wire position or the second inlet wire position, the inlet wires on the two sides cannot be switched on simultaneously, loop closing operation is effectively avoided, and unit safety is improved.
The utility model discloses a theory of operation as follows:
as shown in fig. 3, a utility load is supplied by a #1 generator station service system, a #1 generator 3 supplies power to 220kV high-voltage bus 1 and 6kV 1A station service bus 5 through a #1 main transformer 2 and a #1 high-voltage station service transformer 4, respectively, and the 6kV 1A station service bus 5 supplies power to a utility load 11 through a step-down transformer 10, so that the #1 generator station service load and the utility load operate normally; the #2 generator 7 supplies power to the 220kV high-voltage bus 1 and the 6kV 2A section auxiliary bus 9 through the #2 main transformer 6 and the #2 high-voltage auxiliary transformer 8 respectively, and normal operation of the #1 generator auxiliary load is guaranteed. The first breaker switch 101, the second breaker switch 201, the third breaker switch 203, the fourth breaker switch 102, the fifth breaker switch 202, the seventh breaker switch 206, and the eighth breaker switch 301 are in the on position; the sixth breaker switch 204 is in the divide-by-bit; the single pole double throw type isolation switch 205 is in the first incoming line position. At this time, if the #2 generator is troubleshot, the #1 generator can still supply power to the utility load 11.
As shown in fig. 4, a utility load is supplied by a #2 power generator station service system, a #1 power generator 3 supplies power to 220kV high-voltage bus 1 and 6kV 1A section station service bus 5 through a #1 main transformer 2 and a #1 high-voltage station service transformer 4, respectively, so that the #1 power generator station service load operates normally; the #2 generator 7 supplies power to the 220kV high-voltage bus 1 and the 6kV 2A section of station service bus 9 through the #2 main transformer 6 and the #2 high-voltage station service transformer 8 respectively, and the 6kV 2A section of station service bus 9 supplies power to the public load 11 through the step-down transformer 10, so that the station service load and the public load 11 of the #1 generator can run normally. The first breaker switch 101, the second breaker switch 201, the fourth breaker switch 102, the fifth breaker switch 202, the sixth breaker switch 204, the seventh breaker switch 206, and the eighth breaker switch 301 are in the on position; the third breaker switch 203 is in the off position; single pole double throw type isolation switch 205 is in the second incoming line position. At this time, if the #1 generator is troubleshot, the #2 generator can still supply power to the utility load 11.
As shown in fig. 5, the public load stops running, and the #1 generator 3 supplies power to the 220kV high-voltage bus 1 and the 6kV 1A section of service bus 5 through the #1 main transformer 2 and the #1 high-voltage service transformer 4 respectively, so that the #1 generator service load runs normally; the #2 generator 7 supplies power to the 220kV high-voltage bus 1 and the 6kV 2A section auxiliary bus 9 through the #2 main transformer 6 and the #2 high-voltage auxiliary transformer 8 respectively, so that the auxiliary load of the #1 generator can run normally. The first breaker switch 101, the second breaker switch 201, the fourth breaker switch 102 and the fifth breaker switch 202 are in the closed position; the third breaker switch 203, the sixth breaker switch 204, the seventh breaker switch 206, and the eighth breaker switch 301 are in the off position; the single pole double throw type disconnector 205 is in the middle position.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A power plant service power system accessed to a public load is characterized by comprising a 220kV high-voltage bus (1), a #1 main transformer (2), a #1 generator (3), a #1 high-voltage service transformer (4), a 6kV 1A section of service bus (5), a #2 main transformer (6), a #2 generator (7), a #2 high-voltage service transformer (8), a 6kV 2A section of service bus (9), a step-down transformer (10) and a public load (11);
an outlet of a #1 generator (3) is connected with a low-voltage side of a #1 main transformer (2) and a high-voltage side of a #1 high-voltage station transformer (4), the high-voltage side of the #1 main transformer (2) is connected with a 220kV high-voltage bus (1) through a first circuit breaker switch (101), the low-voltage side of the #1 high-voltage station transformer (4) is connected with a 6kV 1A section station bus (5) through a second circuit breaker switch (201), the 6kV 1A section station bus (5) is connected with a first inlet wire position of a single-pole double-throw type isolating switch (205) through a third circuit breaker switch (203), an outlet of the #2 generator (7) is connected with a low-voltage side of the #2 main transformer (6), the high-voltage side of a #2 high-voltage station transformer (8) is connected, the high-voltage side of a #2 main transformer (6) is connected with a 220kV high-voltage bus (1) through a fourth circuit breaker switch (102), the low-voltage side of the #2 high-voltage station transformer (8) is connected with a 6kV 2A station bus (9) through a fifth circuit breaker switch (202), the 6kV 2A station bus (9) is connected with a second wire inlet of a single-pole double-throw isolating switch (205) through a sixth circuit breaker switch (204), the wire outlet side of the single-pole double-throw isolating switch (205) is connected with the high-voltage side of a step-down transformer (10) through a seventh circuit breaker switch (206), and the low-voltage side of the step-down transformer (10) is connected with a public load (11) through an eighth circuit breaker switch (301).
2. A power plant service electrical system with access to a utility load according to claim 1, characterized in that when the utility load (11) is supplied by a #1 generator (3), the first inlet line of the single-pole double-throw type disconnecting switch (205) is connected, and the #1 generator (3) supplies power to the utility load (11) through a #1 high-voltage service transformer (4), a second breaker switch (201), a 6kv 1A section service bus (5), a third breaker switch (203), a single-pole double-throw type disconnecting switch (205), a seventh breaker switch (206) and a step-down transformer (10).
3. A power plant service electrical system accessing to a utility load according to claim 2, characterized in that when the utility load (11) is supplied by a #2 generator (7), the second input line of the single-pole double-throw type disconnecting switch (205) is connected, and the #2 generator (7) supplies power to the utility load (11) through a #2 high-voltage service transformer (8), a fifth breaker switch (202), a 6kv 2A section service bus (9), a sixth breaker switch (204), a single-pole double-throw type disconnecting switch (205), a seventh breaker switch (206) and a step-down transformer (10).
4. A power plant service electrical system with access to utility loads according to claim 3, characterized in that both generators are capable of supplying power to the utility load (11), and that the #2 generator (7) supplies power to the utility load (11) when the #1 generator (3) is out of order or overhauled.
5. A power plant service electrical system with access to utility loads according to claim 3, characterized in that both generators are capable of supplying power to the utility load (11), and that the #1 generator (3) supplies power to the utility load (11) when the #2 generator (7) is out of order or overhauled.
6. A power plant service electrical system with utility load access according to claim 3, wherein the single pole double throw type disconnector (205) is adapted to switch on either the first or the second inlet position.
7. A power plant service electrical system with access to a utility load according to claim 3, characterized in that the utility load (11) refers to a load with access to service electricity of two generators.
8. A power plant service electrical system with access to a utility load according to claim 7, wherein the load is a back pressure generator system, a battery energy storage system, a molten salt heat storage system, an electrode boiler system or an air compressor system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221535745.4U CN217769492U (en) | 2022-06-17 | 2022-06-17 | Power plant station service power system connected to public load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221535745.4U CN217769492U (en) | 2022-06-17 | 2022-06-17 | Power plant station service power system connected to public load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217769492U true CN217769492U (en) | 2022-11-08 |
Family
ID=83893965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221535745.4U Active CN217769492U (en) | 2022-06-17 | 2022-06-17 | Power plant station service power system connected to public load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217769492U (en) |
-
2022
- 2022-06-17 CN CN202221535745.4U patent/CN217769492U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205231835U (en) | Structure for large -scale thermal power factory unit high pressure service power each other is being equipped with | |
| CN109742809B (en) | Multi-source complementary energy storage type power station security power supply system and control method thereof | |
| CN111416389A (en) | Backpressure machine switching system | |
| CN210404841U (en) | Novel power supply system for hydropower station in black start | |
| CN206237149U (en) | Back pressure type steam turbine generating set passes through current limiter access station service electrical system | |
| CN209448443U (en) | A kind of power plant generator side interconnection wiring system | |
| CN204835226U (en) | Line arrangement structure of two complete clusters is joined in marriage into in wiring of one and half circuit breakers | |
| CN203352172U (en) | Auxiliary power wiring structure for large thermal power plant | |
| CN217769492U (en) | Power plant station service power system connected to public load | |
| CN102957105A (en) | Novel intelligent substation on basis of application of clean energy | |
| CN209658908U (en) | A kind of power plant neighbour machine HV auxiliary power s ystem is mutually for system | |
| CN110518479B (en) | 66kV voltage level wind power generation Fahrenheit boost transformer substation | |
| CN209375151U (en) | A kind of multi-source complementation accumulation energy type power plant emergency power supply system | |
| CN208273464U (en) | Converter station change of current cooler control system | |
| CN101488667A (en) | Power supply method for large sponge titanium smelting total transforming plant | |
| CN110224432A (en) | A kind of box-type substation and its microgrid system control method | |
| CN106655254B (en) | A kind of inverter and transformer integrated equipment | |
| CN212486196U (en) | Power supply system is synthesized to inside of large-scale coal-electricity integration power station | |
| CN111342549A (en) | Power supply system is synthesized to inside of large-scale coal-electricity integration power station | |
| CN112952796A (en) | Power utilization system wiring of offshore flexible direct current converter station and operation method thereof | |
| CN201298734Y (en) | Main electrical wiring for starting fuel gas and steam combined cycle generator set in two-drive-one mode with variable frequency | |
| CN111463893A (en) | Three-power-supply security power supply system of garbage power plant | |
| CN215601042U (en) | Power utilization system wiring of offshore flexible direct current converter station | |
| CN111181244A (en) | Service power interconnection system among multiple thermal power generating units and operation control method | |
| CN220210013U (en) | Motor protection circuit for preventing water supply interruption in water supply pump station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |