CN113489276A - Generator transformation method - Google Patents
Generator transformation method Download PDFInfo
- Publication number
- CN113489276A CN113489276A CN202110801228.0A CN202110801228A CN113489276A CN 113489276 A CN113489276 A CN 113489276A CN 202110801228 A CN202110801228 A CN 202110801228A CN 113489276 A CN113489276 A CN 113489276A
- Authority
- CN
- China
- Prior art keywords
- excitation
- generator
- energy storage
- storage device
- exciter
- 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.)
- Pending
Links
- 238000011426 transformation method Methods 0.000 title claims abstract description 9
- 230000005284 excitation Effects 0.000 claims abstract description 106
- 238000004146 energy storage Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000004044 response Effects 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 9
- 230000001131 transforming effect Effects 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
- H02K19/28—Synchronous generators characterised by the arrangement of exciting windings for self-excitation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/25—Special adaptation of control arrangements for generators for combustion engines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2103/00—Controlling arrangements characterised by the type of generator
- H02P2103/20—Controlling arrangements characterised by the type of generator of the synchronous type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
本发明公开了一种发电机改造方法。本发明针对两种不同的交流励磁机励磁方式，即采用励磁变作为副励磁调节器励磁电源的方式和采用永磁机作为副励磁调节器励磁电源的方式，提供了可实现发电机交流励磁机励磁方式改造为自并励励磁方式的同时保留了原主励磁机的发电机改造方法，对发电机轴系系统的改造较小，有利于发电机轴系系统运行的稳定性，原主励磁机则接入储能装置，提升了机组整体的发电容量，同时通过调节主励磁机的出力可间接提升发电机在响应电网调度调频指令的灵活性。本发明提出的一种发电机改造方法，适用于运行年限较久的交流励磁机励磁方式的发电机，改造工程量较小，并且利旧了主励磁机，有一定的实用价值。
The invention discloses a generator transformation method. The invention aims at two different excitation modes of the AC exciter, namely, the mode of using the excitation variable as the excitation power source of the auxiliary excitation regulator and the mode of using the permanent magnet machine as the excitation power source of the auxiliary excitation regulator, and provides an AC exciter that can realize the generator AC exciter. When the excitation mode is transformed into a self-shunt excitation mode, the generator transformation method of the original main exciter is retained. The transformation of the generator shafting system is small, which is beneficial to the stability of the generator shafting system. The original main exciter is connected to The energy storage device increases the overall power generation capacity of the unit. At the same time, by adjusting the output of the main exciter, the flexibility of the generator in response to the power grid dispatching frequency regulation command can be indirectly improved. The generator reconstruction method proposed by the invention is suitable for the generator in the excitation mode of the AC exciter with a long operating life.
Description
Technical Field
The invention belongs to the technical field of design of thermal power plants, and particularly relates to a generator transformation method.
Background
The excitation modes of the generator can be divided into a static self-shunt excitation mode and an alternating current exciter excitation mode. The alternating current exciter excitation mode adjusts the generator voltage by adjusting the excitation voltage of the main exciter, but the slow excitation adjusting system is provided because the hysteresis time constant of the excitation winding of the alternating current exciter is large and the excitation adjusting response time is long. At present, a static self-shunt excitation system is mostly adopted by a unit, the structure is simple, the overhaul and the operation maintenance are simple, the excitation regulation response time is short, and the terminal voltage and reactive power regulation are quick. Therefore, some units adopting the ac exciter excitation mode with long operation life are gradually transformed into the self-shunt excitation mode.
Disclosure of Invention
The invention aims to provide a generator transformation method, which is characterized in that the excitation mode of an alternating current exciter of a generator is transformed into a self-shunt excitation mode, the original main exciter is reserved, and an energy storage device is connected, so that the operation flexibility of the generator is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for improving the electric generator features that the connection between the original rectifying cabinet of main exciter and the exciting winding of electric generator is disconnected, the newly added energy accumulator is connected to the rectifying cabinet, the newly added main excitation regulator is connected to the exciting winding of electric generator, and the exciting power supply of main excitation regulator is taken from the secondary side of exciting transformer.
The invention is further improved in that the primary exciter is a synchronous generator, and is coaxially connected with the generator, and the working frequency is 100 Hz.
The invention is further improved in that if the original generator adopts the excitation transformer as the excitation power supply of the auxiliary excitation regulator, the excitation transformer is replaced to be the excitation transformer with larger capacity, and the excitation power supply of the main excitation regulator is taken from the secondary side of the excitation transformer.
The invention is further improved in that if the original generator adopts a permanent magnet machine as an excitation power supply of the auxiliary excitation regulator, an excitation transformer is newly added, the primary side of the excitation transformer is connected to the generator end, and the excitation power supply of the main excitation regulator is taken from the secondary side of the excitation transformer.
The invention is further improved in that the energy storage device is selected from a flywheel energy storage device, a lithium battery energy storage device, a super capacitor energy storage device, an electrolytic hydrogen production device or an electrode boiler.
The invention is further improved in that if the energy storage device adopts a flywheel energy storage device, a lithium battery energy storage device or a super capacitor energy storage device, the energy storage device can be switched to a power plant service system to supply power to the service system.
The invention is further improved in that the original main exciter is used for responding to a frequency modulation command issued by the power grid dispatching by the auxiliary unit.
The invention is further improved in that the original main exciter normally works under the working condition of 50% of rated capacity, when the unit responds to the frequency modulation command of adjusting power upwards, the original main exciter reduces load, and when the unit responds to the frequency modulation command of adjusting power downwards, the original main exciter increases load.
The invention has at least the following beneficial technical effects:
1. the method aims to transform the excitation mode of the alternating-current exciter of the generator into a self-shunt excitation mode, compared with the excitation mode of the alternating-current exciter, the self-shunt excitation mode has the advantages of simple structure, high reliability and high response speed, simultaneously reserves the original main exciter, has smaller transformation engineering quantity, and is beneficial to the stability of the running of a shafting system of the generator.
2. The method utilizes the original main exciter and the rectifier cabinet which are supposed to be removed in the self-shunt excitation mode to connect the original main exciter and the rectifier cabinet into the energy storage device, thereby not only improving the power generation capacity of the whole unit, but also improving the operation flexibility of the generator by changing the output of the original main exciter.
Compared with the prior art, the invention has the following remarkable advantages:
1. the method of the invention maintains the original main exciter while transforming the excitation mode of the alternating-current exciter into the self-shunt excitation mode, has small transformation on the original generator shafting system and ensures the stability of the operation of the original generator shafting system.
2. According to the method, the original main exciter rectifier cabinet is connected to the energy storage device, so that the power generation capacity of the whole unit is improved, the flexibility of the operation of the generator can be improved, and the generator can respond to a frequency modulation command by adjusting the output of the original main exciter.
Drawings
Fig. 1 is a schematic diagram of an ac exciter excitation scheme using an excitation transformer as a secondary excitation regulator excitation source.
Fig. 2 is a schematic diagram of an ac exciter excitation mode using a permanent magnet machine as an auxiliary excitation regulator excitation power supply.
Fig. 3 is a schematic diagram of the improved self-shunt excitation mode and the original main exciter connected to the energy storage device.
Fig. 4 is a schematic diagram of an electrical system according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the original generator adopts an alternating current exciter excitation mode in which an excitation variation is used as an excitation power supply of an auxiliary excitation regulator, and the method for modifying the generator provided by the invention is characterized in that the connection between a rectifier cabinet of the original main exciter and an excitation winding of the generator is disconnected, the rectifier cabinet is connected with a newly-added energy storage device, the newly-added main excitation regulator is connected with the excitation winding of the generator, the excitation power supply of the main excitation regulator is taken from the secondary side of the excitation variation, as shown in fig. 3, the original main exciter is a synchronous generator and is coaxially connected with the generator, the working frequency is 100Hz, the excitation variation with larger capacity is changed at the same time, and the excitation power supply of the main excitation regulator can be taken from the secondary side of the excitation variation.
As shown in fig. 2, the original generator adopts an alternating current exciter excitation mode in which a permanent magnet machine is used as an excitation power supply of an auxiliary excitation regulator, and the method for transforming the generator provided by the invention is characterized in that the connection between a rectifier cabinet of the original main exciter and an excitation winding of the generator is disconnected, the rectifier cabinet is connected with a newly-added energy storage device, the newly-added main excitation regulator is connected with the excitation winding of the generator, and the excitation power supply of the main excitation regulator is taken from the secondary side of the excitation transformer, as shown in fig. 3, the original main exciter is a synchronous generator and is coaxially connected with the generator, the working frequency is 100Hz, because the original generator adopts the permanent magnet machine as the excitation power supply of the auxiliary excitation regulator, the excitation transformer is newly added, the primary side of the excitation transformer is connected to the generator end, and the excitation power supply of the main excitation regulator is taken from the secondary side of the excitation transformer.
In the two transformation modes, the energy storage mode of the energy storage device connected to the original main exciter can be selected from a flywheel energy storage device, a lithium battery energy storage device, a super capacitor energy storage device, an electrolytic hydrogen production device or an electrode boiler, but is not limited to the above energy storage modes.
If the energy storage device adopts a flywheel energy storage device, a lithium battery energy storage device or a super capacitor energy storage device, the energy storage device can be switched to a power plant service system to supply power to the service system.
After transformation, the main exciter can be used for responding to a frequency modulation command issued by power grid dispatching by the auxiliary unit, and the mode method for responding to the frequency modulation command issued by the power grid dispatching comprises the steps that the main exciter normally works under the working condition of 50% of rated capacity, when the unit responds to the frequency modulation command for adjusting power upwards, the load of the main exciter is reduced, and when the unit responds to the frequency modulation command for adjusting power downwards, the load of the main exciter is increased.
Example 1
As shown in fig. 4. The embodiment is a 200MW unit of a power plant, a main exciter of the power plant is connected to a 5MW lithium iron phosphate energy storage facility through a rectifier cabinet, and the energy storage facility is connected to a low-voltage power plant power utilization system through an inverter cabinet. When the energy storage battery works normally, the main exciter and the generator rotate coaxially, and work under the working condition of 50% load to charge the energy storage battery. When the unit responds to a frequency modulation command which is issued by dispatching and increases output power, the main exciter stops charging, and meanwhile, the lithium iron phosphate battery supplies power to low-voltage station service through the inverter cabinet. And when the unit responds to the frequency modulation command which is issued by the dispatching and used for reducing the output, the load of the main exciter is increased. The energy storage facility can be used as a security power supply for service power.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110801228.0A CN113489276A (en) | 2021-07-15 | 2021-07-15 | Generator transformation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110801228.0A CN113489276A (en) | 2021-07-15 | 2021-07-15 | Generator transformation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113489276A true CN113489276A (en) | 2021-10-08 |
Family
ID=77939566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110801228.0A Pending CN113489276A (en) | 2021-07-15 | 2021-07-15 | Generator transformation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113489276A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59156199A (en) * | 1983-02-25 | 1984-09-05 | Fuji Electric Co Ltd | Excitation regulator of ac generator |
| CN101018036A (en) * | 2006-12-29 | 2007-08-15 | 山东齐鲁电机制造有限公司 | Dynamotor brushless excitation adjuster with the protection device |
| CN103326650A (en) * | 2013-05-15 | 2013-09-25 | 华中科技大学 | Self-shunt excitation system of electric generator |
| CN108199389A (en) * | 2017-12-11 | 2018-06-22 | 囯网河北省电力有限公司电力科学研究院 | A kind of method and device for improving the response of thermal power generation system primary frequency modulation |
| CN209030131U (en) * | 2018-10-25 | 2019-06-25 | 山东省环能设计院股份有限公司 | A kind of generator excitation power supply system |
-
2021
- 2021-07-15 CN CN202110801228.0A patent/CN113489276A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59156199A (en) * | 1983-02-25 | 1984-09-05 | Fuji Electric Co Ltd | Excitation regulator of ac generator |
| CN101018036A (en) * | 2006-12-29 | 2007-08-15 | 山东齐鲁电机制造有限公司 | Dynamotor brushless excitation adjuster with the protection device |
| CN103326650A (en) * | 2013-05-15 | 2013-09-25 | 华中科技大学 | Self-shunt excitation system of electric generator |
| CN108199389A (en) * | 2017-12-11 | 2018-06-22 | 囯网河北省电力有限公司电力科学研究院 | A kind of method and device for improving the response of thermal power generation system primary frequency modulation |
| CN209030131U (en) * | 2018-10-25 | 2019-06-25 | 山东省环能设计院股份有限公司 | A kind of generator excitation power supply system |
Non-Patent Citations (1)
| Title |
|---|
| 贺长宏: ""安康水电站励磁系统及交流励磁机改发电机的可行性研究"", 《工程科技Ⅱ辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105937477B (en) | A kind of wind-powered electricity generation photovoltaic micro pumped storage system | |
| CN104836254B (en) | A kind of power grid"black-start" system and the method for photovoltaic plant participation power grid"black-start" | |
| CN112803472A (en) | Direct-current coupling hydrogen production system and control method thereof | |
| CN105186660B (en) | Off-network type wind power hydrogen production converting system | |
| CN105978008B (en) | A kind of redox flow battery energy storage system and its working method with wind field black starting-up function | |
| CN114481179B (en) | Medium-voltage direct-current collection type renewable energy power generation hydrogen production system and working method thereof | |
| De Matos et al. | Power control in AC autonomous and isolated microgrids with renewable energy sources and energy storage systems | |
| CN105552966A (en) | Energy-storage direct-drive permanent magnet wind power generation system | |
| CN102157962A (en) | Wind power generator unit based complementary power generating system and grid combined debugging method | |
| CN104300577B (en) | Generation of electricity by new energy and the islet operation method of D.C. high voltage transmission direct connection system | |
| Hajahmadi et al. | Output power smoothing of wind power plants using unified inter-phase power controller equipped with super-capacitor | |
| Kallel et al. | Control management strategy of stand-alone hybrid power micro-system using super-capacitor | |
| Dang et al. | Islanded microgrids black start procedures with wind power integration | |
| CN204721000U (en) | A kind of friendly and expand grid-connected power generation system flexibly to electrical network | |
| Ion et al. | Autonomous micro-grid based on micro hydro power plants | |
| CN115149552B (en) | Control method of alternating-current coupling off-grid wind power hydrogen production system | |
| CN113489276A (en) | Generator transformation method | |
| Kumar et al. | Performance analysis of hybrid energy storage system-based DC microgrid for a developed control technique | |
| Honghai et al. | Research of super capacitor energy storage system based on DG connected to power grid | |
| CN112909988B (en) | Off-grid doubly-fed wind turbine generator system power generation system, hydrogen production system and control method thereof | |
| Wang et al. | Operation Control Strategy of Multi-Energy DC Micro-Grid Considering Complementary Inertia of Gas and Battery | |
| CN113991637A (en) | Direct-current micro-grid power transmission system applied to oil drilling machine | |
| CN113852318A (en) | New energy power generation direct drive system | |
| Huang et al. | A Coordinated Voltage Control Strategy for Coordination of Wind Turbines Variable Mode control and OLTC in Distribution Grid | |
| Jan | Microgrid: innovation, challenges and prospects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211008 |