CN214590611U - A system for reducing no-load loss of power plant startup and standby - Google Patents
A system for reducing no-load loss of power plant startup and standby Download PDFInfo
- Publication number
- CN214590611U CN214590611U CN202120707453.3U CN202120707453U CN214590611U CN 214590611 U CN214590611 U CN 214590611U CN 202120707453 U CN202120707453 U CN 202120707453U CN 214590611 U CN214590611 U CN 214590611U
- Authority
- CN
- China
- Prior art keywords
- standby
- transformer
- starting
- circuit breaker
- voltage
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 18
- 230000009471 action Effects 0.000 claims description 7
- 230000004907 flux Effects 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
一种降低发电厂启备变空载损耗的系统，包括启备变和高压厂用变压器；启备变的高压侧与启备变高压侧断路器相连接，低压侧与启备变备用进线断路器相连接；高压厂用变压器的高压侧与高压厂用变压器高压侧断路器相连接，低压侧与厂用进线断路器相连接；启备变上电量和非电量信息通过启备变保护柜采集，高压厂用变压器上电量和非电量信息通过高压厂用变压器保护柜采集，启备变保护柜和高压厂用变压器保护柜通过快切装置与励磁涌流抑制器相连，启备变备用进线断路器和厂用进线断路器与厂用母线相连接，快切装置上设置有启备变风冷装置。本实用新型通过励磁涌流抑制器与快切装置的配合降低启备变热备用时空载损耗和启备变风冷装置的运行损耗。
A system for reducing no-load loss of start-up and standby transformers in power plants, including start-up and backup transformers and high-voltage plant transformers; The circuit breaker is connected; the high-voltage side of the high-voltage factory transformer is connected to the high-voltage side circuit breaker of the high-voltage factory transformer, and the low-voltage side is connected to the factory incoming circuit breaker; the power and non-power information of the start-up transformer is protected by the start-up transformer Cabinet collection, the power and non-power information of the high-voltage factory transformer is collected through the high-voltage factory transformer protection cabinet, the start-up transformer protection cabinet and the high-voltage factory transformer protection cabinet are connected to the excitation inrush current suppressor through the quick-cut device, and the start-up transformer and the backup input are connected. The line circuit breaker and the factory incoming circuit breaker are connected with the factory bus, and the quick-cutting device is provided with a start-up variable air cooling device. The utility model reduces the no-load loss and the running loss of the start-up and standby air-cooling device when the startup and standby are heated and standby by the cooperation of the excitation inrush current suppressor and the fast-cutting device.
Description
Technical Field
The utility model relates to a power generation side technical field of system, concretely relates to system for reducing power plant and starting to become empty and carry loss.
Background
The starting and standby of the power plant always adopts the running state of hot standby, firstly, no-load loss exists, secondly, for most power plants, the starting and standby of the power plant uses industrial electricity purchased by a power grid, the electricity price is higher than the self-electricity consumption in the plant, obvious electricity price difference exists, and if the starting and standby of the power plant is changed into cold standby, the economic benefit is obvious. However, the starting-up transformer relates to the safe operation of the service power, and the hot standby operation has higher reliability; the starting-up is changed into a cold standby operation mode, so that no-load loss is reduced, but the operation risk is increased.
Disclosure of Invention
In order to overcome above technical problem, the utility model aims to provide a system for reducing power plant start-up becomes empty and carries loss, can reduce transformer self no-load loss and cooling system's running loss through the cold reserve mode of messenger's start-up transformer adoption on the one hand, and on the other hand can guarantee the safety and stability of factory power supply system, can not adopt cold reserve mode and increase hidden danger because of start-up transformer.
In order to realize the purpose, the utility model discloses a technical scheme is:
a system for reducing the air load loss of a starting device of a power plant comprises a high-voltage station transformer 4, wherein the high-voltage side of the high-voltage station transformer 4 is connected with a high-voltage side circuit breaker 5 of the high-voltage station transformer, the low-voltage side of the high-voltage station transformer is connected with a station incoming line circuit breaker 6, and information of electric quantity and non-electric quantity on the high-voltage station transformer 4 is collected through a high-voltage station transformer protection cabinet 8;
the high-voltage side of the starting-standby transformer 1 is connected with a starting-standby transformer high-voltage side circuit breaker 2, the low-voltage side of the starting-standby transformer is connected with a starting-standby incoming line circuit breaker 3, and the information of the electric quantity and the non-electric quantity on the starting-standby transformer 1 is collected through a starting-standby transformer protection cabinet 7;
the starting transformer protection cabinet 7 and the high-voltage station transformer protection cabinet 8 are both connected with a fast switching device 9, and the fast switching device 9 is connected with an excitation inrush current suppressor 10.
The standby inlet wire breaker 2 and the factory inlet wire breaker 6 are connected with a factory bus 12, and the standby air-to-air cooling device 11 is arranged on the fast switching device 9.
And a protection action outlet of the starting-standby transformer substation protection cabinet 7 is connected with the starting-standby transformer substation high-voltage side circuit breaker 2, and an information alarm outlet is connected with the fast switching device 9.
And a protection action outlet of the high-voltage station transformer protection cabinet 8 is connected with a high-voltage side circuit breaker 5 of the high-voltage station transformer, and an information alarm outlet is connected with a quick-switching device 9.
And an automatic switching-on instruction of the starting-standby variable high-voltage side circuit breaker 2 of the quick switching device 9 passes through the excitation inrush current suppressor 10 and then is output to the starting-standby variable high-voltage side circuit breaker 2.
And the fast switching device 9 sends a switching-on/off command to the standby incoming line breaker 3 and the service incoming line breaker 6.
And the switch auxiliary contacts of the starting-standby transformer high-voltage side circuit breaker 2, the standby incoming line circuit breaker 3 and the service incoming line circuit breaker 6 are connected into the quick switching device 9.
The utility model has the advantages that:
the utility model discloses a cooperation of excitation surge suppressor and fast cutting device to cutting the device function soon and perfect, can reliably realize starting to be equipped with and trun into cold reserve by hot reserve, and start opening and stop of becoming the forced air cooling plant by cutting device control soon, reduce and start to be equipped with the running loss that becomes the forced air cooling plant with the space-time load loss of becoming the forced air cooling plant when reserve.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1: the utility model provides a system for reduce power plant and start and be equipped with empty loss of carrying that becomes, is become 1 including starting to be equipped with, starts to be equipped with and becomes high voltage side circuit breaker 2, reserve inlet wire circuit breaker 3, fast cutting device 9, excitation surge suppressor 10, start to be equipped with and become air cooling plant 11, start to be equipped with and become protection cabinet 7, transformer 4 for the high-voltage plant, transformer high-voltage side circuit breaker 5 for the high-voltage plant, inlet wire circuit breaker 6 for the plant, transformer protection cabinet 8 for the high-voltage plant, bus 12 for the plant.
The high-voltage side of the starting-standby transformer substation 1 is connected with a starting-standby transformer substation high-voltage side circuit breaker 2, and the low-voltage side of the starting-standby transformer substation standby incoming line circuit breaker 3. The high-voltage side of the high-voltage station transformer 4 is connected with a high-voltage side breaker 5 of the high-voltage station transformer, and the low-voltage side of the high-voltage station transformer is connected with a station incoming line breaker 6. The starting-standby transformer substation protection cabinet 7 collects information of electric quantity and non-electric quantity of the starting-standby transformer substation 1 to perform logic judgment, a protection action outlet is connected with the starting-standby transformer substation high-voltage side circuit breaker 2, and an information alarm outlet is connected with the fast switching device 9. The high-voltage station transformer protection cabinet 8 collects the information of the electric quantity and the non-electric quantity of the high-voltage station transformer 4 to carry out logic judgment, the protection action outlet is connected with the high-voltage side circuit breaker 5 of the high-voltage station transformer, and the information alarm outlet is connected with the quick-switching device 9. The magnetizing inrush current suppressor 10 collects the information of the electric quantity of the starting-standby transformer 1 to carry out logic judgment, and an automatic switching-on instruction of the starting-standby transformer high-voltage side circuit breaker 2 of the quick switching device 9 passes through the magnetizing inrush current suppressor 10 and then is output to the starting-standby transformer high-voltage side circuit breaker 2. The fast switching device 9 collects the electric quantity information of the high-voltage station transformer 4 and the starting-standby transformer 1, collects the information alarm outlets of the starting-standby transformer protection cabinet 7 and the high-voltage station transformer protection cabinet 8 to perform comprehensive logic judgment, and sends a switching-on/off command to the starting-standby incoming line breaker 3 and the station incoming line breaker 6.
And the switch auxiliary contacts of the standby transformer high-voltage side circuit breaker 2, the standby incoming line circuit breaker 3 and the service incoming line circuit breaker 6 are connected into the quick-switching device 9. The quick-cut device 9 can send starting and stopping instructions to the starting variable air cooling device 11. The standby incoming line circuit breaker 2 and the service incoming line circuit breaker 6 are connected with a service bus 12.
The magnetizing inrush current suppressor 10 can effectively suppress the magnitude of the magnetizing inrush current through the voltage angle of the no-load closing of the transformer. The main principle is as follows: the waveform of the voltage of the external power supply of the transformer is consistent with that of the main magnetic flux, but leads 90 degrees, so that the waveform of the main magnetic flux can be obtained by measuring the waveform of the voltage, and the polarity of residual magnetism during power failure can be obtained by measuring the waveform of the power failure voltage. Then the closing time of the circuit breaker is controlled, so that the polarities of bias magnetism and residual magnetism generated when the transformer is in no-load power-on are opposite, and the bias magnetism and the residual magnetism act together with stable magnetic flux, so that the total magnetic flux is lower than the saturated magnetic flux of the transformer, the inrush current can be restrained, and the condition that the starting-standby transformer differential protection is mistakenly operated due to the fact that excitation inrush current is generated by impacting the starting-standby transformer can be prevented.
The fast switching device 9 is distinguished through the position contact of starting and standby changing high-voltage side circuit breaker 2 and starting and standby changing inlet wire circuit breaker 3, only when starting and standby changing high-voltage side circuit breaker 2 and starting and standby changing inlet wire circuit breaker 3 are all closed, a starting instruction is sent to the starting and standby changing air cooling device 11 to cool a starting and standby changing oil way, and the starting and standby changing cold standby or hot standby is small in calorific value due to the fact that no load current exists, and cooling can be omitted.
A method of reducing power plant startup empty load loss, comprising the steps of:
step 1, the startup and standby transformer 1 is in a cold standby state, the high-voltage station transformer 4 is in a working state, and the startup and standby air cooling device 11 is in a stop state. When the switching is manually started, the alarm signal of the standby-transformer-free protection cabinet 7 is confirmed, and the fast switching device 9 executes the parallel automatic switching. Firstly, a switching-on instruction of a standby transformer high-voltage side circuit breaker 2 is sent to an excitation inrush current suppressor 10 for judgment, the excitation inrush current suppressor 10 judges that the switching-on time controls switching-on of the standby transformer high-voltage side circuit breaker 2, a fast switching device 9 receives an auxiliary contact of the standby transformer high-voltage side circuit breaker 2 and then judges that the switching-on instruction of a standby incoming line circuit breaker 3 is sent, the standby incoming line circuit breaker 6 is automatically tripped after being lined correctly, if the standby transformer high-voltage side circuit breaker 2 and the standby incoming line circuit breaker 3 are switched on due to time-out (parallel automatic tripping time delay) but not tripped, the fast switching device 9 starts a decoupling function, the standby transformer air cooling device is started after the standby transformer high-voltage side circuit breaker 2 and the standby incoming line circuit breaker 3 are both switched on, and a standby bus transfer 12 is powered by a standby transformer 1.
step 4, the standby transformer 1 is in a hot standby state, the high-voltage station transformer is in a working state, the standby transformer air cooling device 11 is in a stop state, an alarm signal of a protection cabinet 7 without the standby transformer is confirmed, when the switching is manually started, the alarm signal of the protection cabinet 7 without the standby transformer is confirmed, the fast switching device 9 executes semi-automatic parallel switching, firstly, an instruction of switching the standby incoming line breaker 3 is sent, the standby incoming line breaker 3 is parallelly and correctly delayed to wait for manually tripping the station incoming line breaker 6 without error, if the standby incoming line breaker 2 and the standby incoming line breaker 3 are overtime (parallel semi-automatic tripping delay) and do not trip, the fast switching device 9 starts a decoupling function, the standby transformer air cooling device is started after the standby high-voltage side breaker 2 and the standby incoming line breaker 3 are both switched in, and the station bus 12 is supplied with power by the standby transformer 1;
step 6, the starting-up transformer 1 is in a cold standby state, the high-voltage station transformer is in a working state, the starting-up air-cooling device 11 is in a stop state, when manual starting switching is carried out, an alarm signal of a protection cabinet 7 without the starting-up transformer is confirmed, the fast switching device 9 executes series switching, the station incoming line circuit breaker 6 is tripped, then a command of closing the standby incoming line circuit breaker 3 is sent out after the switching condition is judged to be met, the starting-up air-cooling device is started after the starting-up high-voltage side circuit breaker 2 and the standby incoming line circuit breaker 3 are both closed, and the station bus 12 is supplied with power by the starting-up transformer 1;
step 7, the startup and standby transformer 1 is in a cold standby state, the high-voltage station transformer is in a working state, the startup and standby air cooling device 11 is in a stop state, when the switching is manually started, the alarm signal of the backup transformer protection cabinet 7 is confirmed to be absent, the fast switching device 9 executes fast (synchronous and residual voltage) switching, firstly the service incoming line breaker 6 is tripped, then, a switching-on instruction of the standby transformer high-voltage side circuit breaker 2 is sent to the excitation inrush current suppressor 10 for judgment, the excitation inrush current suppressor 10 judges the switching-on time to control switching-on of the standby transformer high-voltage side circuit breaker 2, the fast switching device 9 receives an auxiliary contact of the standby transformer high-voltage side circuit breaker 2, judges the switching-on and sends an instruction of switching-on the standby incoming line circuit breaker after judging that the switching-on condition is met, the standby transformer wind cooling device is started after the standby transformer high-voltage side circuit breaker 2 and the standby incoming line circuit breaker 3 are confirmed to be switched in, and the plant bus 12 is supplied with power by the standby transformer 1;
The electric quantity logic of the fast switching device 9 is not modified, and the delay setting in the fixed value can be verified and set according to the actual on-load test, so that the power loss of the important auxiliary machine in the auxiliary power switching process is avoided. In order to prevent the switching failure caused by the self fault of the transformer when the standby is started and changed into the cold standby state, the transformer can be enhanced to be patrolled and periodically switched into the working state manually, and the operation can be changed into the hot standby state in severe weather or at the same time.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A system for reducing the air load loss of starting and standby of a power plant is characterized by comprising a high-voltage station transformer (4), wherein the high-voltage side of the high-voltage station transformer (4) is connected with a high-voltage side circuit breaker (5) of the high-voltage station transformer, the low-voltage side of the high-voltage station transformer is connected with a station incoming line circuit breaker (6), and the information of electric quantity and non-electric quantity on the high-voltage station transformer (4) is collected through a high-voltage station transformer protection cabinet (8);
the high-voltage side of the starting-standby transformer (1) is connected with a starting-standby high-voltage side circuit breaker (2), the low-voltage side of the starting-standby transformer is connected with a starting-standby incoming line circuit breaker (3), and the information of the electric quantity and the non-electric quantity on the starting-standby transformer (1) is collected through a starting-standby transformer protection cabinet (7);
the starting transformer protection cabinet (7) and the high-voltage station transformer protection cabinet (8) are both connected with a fast switching device (9), and the fast switching device (9) is connected with an excitation inrush current suppressor (10).
2. The system for reducing the open-air load loss of the starting and standby of the power plant according to claim 1, characterized in that the starting and standby incoming line breaker (3) and the service incoming line breaker (6) are connected with a service bus (12), and the starting and standby air cooling device (11) is arranged on the fast switching device (9).
3. The system for reducing the empty load loss of the starting and standby transformer of the power plant as claimed in claim 1, characterized in that a protection action outlet of the starting and standby transformer protection cabinet (7) is connected with the starting and standby high voltage side circuit breaker (2), and an information alarm outlet is connected with the fast switching device (9).
4. The system for reducing the air load loss of the starting and standby of the power plant according to claim 1, wherein a protection action outlet of the high-voltage station transformer protection cabinet (8) is connected with a high-voltage side circuit breaker (5) of the high-voltage station transformer, and an information alarm outlet is connected with a quick switching device (9).
5. The system for reducing the loss of the starting and standby empty load of the power plant according to claim 1, wherein the automatic closing command of the starting and standby high-voltage side circuit breaker (2) of the fast switching device (9) passes through the magnetizing inrush current suppressor (10) and then is exported to the starting and standby high-voltage side circuit breaker (2).
6. The system for reducing the loss of the starting-standby and idling loads of the power plant as claimed in claim 1, wherein the fast switching device (9) sends a switching-on and switching-off command to be exported to the starting-standby incoming line breaker (3) and the service incoming line breaker (6).
7. The system for reducing the loss of the starting and standby transformer no-load of the power plant according to claim 1, characterized in that the switch auxiliary contact access fast-switching device (9) of the starting and standby transformer high-voltage side circuit breaker (2), the standby incoming line circuit breaker (3) and the service incoming line circuit breaker (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120707453.3U CN214590611U (en) | 2021-04-08 | 2021-04-08 | A system for reducing no-load loss of power plant startup and standby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120707453.3U CN214590611U (en) | 2021-04-08 | 2021-04-08 | A system for reducing no-load loss of power plant startup and standby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214590611U true CN214590611U (en) | 2021-11-02 |
Family
ID=78323705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120707453.3U Active CN214590611U (en) | 2021-04-08 | 2021-04-08 | A system for reducing no-load loss of power plant startup and standby |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214590611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909941A (en) * | 2021-04-08 | 2021-06-04 | 西安热工研究院有限公司 | System and method for reducing starting and standby variable air load loss of power plant |
-
2021
- 2021-04-08 CN CN202120707453.3U patent/CN214590611U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909941A (en) * | 2021-04-08 | 2021-06-04 | 西安热工研究院有限公司 | System and method for reducing starting and standby variable air load loss of power plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111835031A (en) | Wind generating set converter network side circuit breaker and machine side switch control strategy | |
| CN214590611U (en) | A system for reducing no-load loss of power plant startup and standby | |
| CN201563003U (en) | Dual-power switching device for air-cooled control box of large-size power transformer | |
| CN202917938U (en) | An anti-shake system | |
| WO2024251118A1 (en) | Photovoltaic energy storage system | |
| CN218472836U (en) | Electric system of concentrated cooling station | |
| CN112909941A (en) | System and method for reducing starting and standby variable air load loss of power plant | |
| CN2927448Y (en) | Low-voltage reactive compensator | |
| CN212726901U (en) | Nuclear power plant excitation power supply system and excitation regulator power supply output circuit thereof | |
| CN108512484A (en) | A kind of motor protection investigating method of the anti-shake Electricity Functional of band | |
| CN203760403U (en) | Circuit breaker with time relay | |
| CN112327152A (en) | A FC switch closing-dividing time test and its zero-sequence protection setting system and method | |
| CN202084985U (en) | Self-startup power supply apparatus | |
| CN106531569A (en) | Anti-burning device for opening-closing coil | |
| CN219893014U (en) | Control circuit of UPS (uninterrupted Power supply) of low-voltage cabinet of molten salt energy storage system | |
| CN216774368U (en) | Power supply device of gas cogeneration control system | |
| CN214280915U (en) | Leakage protection and voltage stabilization uninterrupted intelligent power supply system | |
| CN205507574U (en) | Transformer automatically cooling system | |
| CN214255692U (en) | Motor protector control loop for high-temperature reactor direct-current power supply | |
| CN219697488U (en) | Control system with redundant hot standby frequency converter and soft starter | |
| CN221126953U (en) | Black start circuit and energy storage equipment | |
| CN211720327U (en) | Dual-power automatic switching control device | |
| CN217159366U (en) | Dual-power standby circuit in energy-saving control module of contactor | |
| CN221263454U (en) | Main transformer low-voltage side circuit breaker circuit of 220kV transformer substation main transformer spraying system | |
| CN216721270U (en) | Photovoltaic box-type substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |