CN112670965A - Land double-fed wind turbine generator and box-type transformer combined electrical system - Google Patents
Land double-fed wind turbine generator and box-type transformer combined electrical system Download PDFInfo
- Publication number
- CN112670965A CN112670965A CN202011640601.0A CN202011640601A CN112670965A CN 112670965 A CN112670965 A CN 112670965A CN 202011640601 A CN202011640601 A CN 202011640601A CN 112670965 A CN112670965 A CN 112670965A
- Authority
- CN
- China
- Prior art keywords
- wind turbine
- box
- transformer
- turbine generator
- type transformer
- 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
Images
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a land double-fed wind turbine generator and box-type transformer combined electrical system, wherein a circuit breaker is arranged on a main loop between a wind turbine generator and a box-type transformer, a distribution transformer is connected between the low-voltage side of the box-type transformer and the circuit breaker in parallel, the distribution transformer is electrically connected with a wind turbine generator load, a box-type transformer load and a UPS power supply, and the UPS power supply supplies power to a wind turbine generator and a secondary loop of a controller, a contactor and the circuit breaker of the box-type transformer. The method and the device can reduce the risk points of possible failure on the basis of ensuring the reliability of the operation safety of the equipment, simplify the equipment, reduce the cost and improve the reliability of the protection of the wind turbine generator and the box-type transformer.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a combined electrical system of a land double-fed wind turbine generator and a box-type transformer.
Background
In recent years, the wind power industry in China develops rapidly. By 3 months in 2020, the wind power in China is accumulated and installed by 2.13 hundred million kilowatts and is stably positioned at the first position in the world. Meanwhile, as the wind turbine generator is developed towards the large capacity of a long blade and a single machine, the cost of a single wind turbine generator is higher and higher, and the influence of shutdown fault loss is larger and larger. According to the statistical data of the faults, the wind driven generator, the frequency converter, the box type transformer (hereinafter referred to as box transformer) and other electrical faults account for more than half of the total quantity of the faults of the wind power plant, and dozens of accidents of fan burnout and personnel burn in recent years in the wind power industry are all caused by the electrical faults. Therefore, the electric fault occupation ratio of the fan is high, and the consequence is serious.
At present, a wind turbine generator and a box transformer substation are designed and purchased respectively, so that the design and the configuration of electrical circuits of the wind turbine generator and the box transformer substation are redundant, the utilization rate is low, a plurality of fault points exist, and the economical efficiency is poor. The wind turbine generator is positioned at the tail end of a power grid, fault current is relatively small, and the fault current is influenced by large current of low-voltage ride through, so that the conventional protection constant values of all levels are large and the sensitivity is low. How to create a wind turbine generator and box-type transformer combined electrical system with strong maintainability and high protection sensitivity belongs to one of the current important research and development subjects.
Disclosure of Invention
The invention aims to provide a combined electrical system of a land double-fed wind turbine generator and a box-type transformer. The wind turbine generator system and the box transformer substation protection method have the advantages that the device can be simplified, the fault points are reduced, the reliability of the wind turbine generator system and the box transformer substation protection is improved, and accordingly the defects of an existing wind turbine generator system electrical system are overcome.
In order to solve the technical problem, the invention provides a combined electrical system of a land double-fed wind turbine generator and a box-type transformer, wherein a circuit breaker is arranged on a main loop between a wind turbine generator and the box-type transformer, a distribution transformer is connected between the low-voltage side of the box-type transformer and the circuit breaker in parallel, the distribution transformer is electrically connected with a wind turbine generator load, a box-type transformer load and a UPS power supply, and the UPS power supply supplies power to a controller of the wind turbine generator and the box-type transformer, a contactor and a secondary loop of the circuit breaker.
As an improvement of the invention, a knife-shaped fuse switch is arranged between the wind driven generator and the box-type transformer and is installed at the bottom of the wind turbine generator system.
Furthermore, a first current transformer is arranged on a main loop from the wind driven generator to the box type transformer, a second current transformer is arranged on a stator current output line of the wind driven generator, the comprehensive protection device is respectively electrically connected with the first current transformer, the second current transformer and the circuit breaker, the low-voltage side current of the box type transformer and the stator current of the wind driven generator are used as input signals to control the circuit breaker to trip, and the comprehensive protection device is connected with the monitoring system of the booster station through a switch and an optical fiber.
Further, the comprehensive protection device and the switch are installed at the bottom of the wind turbine generator system.
Further, the distribution transformer is a 690V/400V transformer.
Further, the distribution transformer supplies power to the box transformer load, the wind turbine load, and the UPS power source through a box substation panel and a fan panel.
Furthermore, a grid-connected contactor is arranged on a stator current output line of the wind driven generator, and a grid-side contactor is arranged on a rotor current output line of the wind driven generator.
After adopting such design, the invention has at least the following advantages:
1. a distribution transformer and a UPS power supply are uniformly configured for the wind turbine generator and the box-type transformer, and a fuse switch is arranged at the bottom of the tower of the wind turbine generator, so that the risk points of possible faults are reduced on the basis of ensuring the reliability of the operation safety of equipment, the equipment is simplified, and the cost is reduced.
2. The comprehensive protection device is arranged at the bottom of the fan tower, so that the protection reliability of the wind turbine generator and the box-type transformer is improved, and meanwhile, the good operation environment of the bottom of the fan tower is also beneficial to prolonging the service life of the comprehensive protection device and maintaining good performance.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic diagram of a combined electrical system of a land double-fed wind turbine generator and a box-type transformer.
Detailed Description
Referring to fig. 1, the present invention provides an electrical system combining a land double-fed wind turbine generator and a box-type transformer, including a circuit breaker Q1, a fuse switch Q2, a grid-connected contactor Q3, a grid-side contactor Q4, a first current transformer CT1, a second current transformer CT2, a distribution transformer T1, a UPS power supply, and a comprehensive protection device.
On the 690V main circuit between the wind power generator and the box transformer T1, a breaker Q1 is provided at one end near the low-voltage side of the box transformer T1 as a main protection device for removing a fault in the electric circuit. A knife fuse switch Q2 is further arranged on a 690V main loop between the wind driven generator and the box type transformer T1, and the knife fuse switch Q2 is installed at the bottom of the wind turbine generator and serves as an obvious disconnection point for operation and maintenance of a fan electric loop and also serves as backup protection of fan electric faults. A distribution transformer T2 is connected in parallel between the low voltage side of the box transformer T1 and a breaker Q1, the distribution transformer T2 supplies power to the box transformer load, the wind turbine load, and the UPS power supply through a box transformer panel P1 and a fan panel P2, respectively. The UPS supplies power to the wind driven generator, the controller of the box type transformer, the contactor and the secondary circuit of the breaker.
Preferably, the distribution transformer T2 is a 690V/400V transformer.
A second current transformer CT2 is arranged on a stator current output line of the wind driven generator, a first current transformer CT1 is arranged on a main loop between the wind driven generator and a box type transformer T1, and the comprehensive protection device is installed at the bottom of a wind turbine generator and is respectively electrically connected with a first current transformer CT1, a second current transformer CT2 and a breaker Q1, and the low-voltage side current of the box type transformer T1 and the stator current of the wind driven generator are used as input signals for controlling the breaker Q1 to trip. Meanwhile, the comprehensive protection device is also connected to the switch and is connected to the booster station monitoring system through an optical fiber (laid along with a collection line), and the comprehensive protection device is used for transmitting the three-remote information of the box-type transformer T1 to the booster station monitoring system.
Preferably, a grid-connected contactor Q3 is provided on a stator current output line of the wind turbine, and a grid-side contactor Q4 is provided on a rotor current output line of the wind turbine.
On the basis of ensuring the reliability of the operation safety of equipment, the invention optimizes the equipment configuration, reduces the manufacturing cost, improves the sensitivity and the maintainability of the relay protection device, and realizes the monitoring requirements of an intelligent wind power plant of 'unattended operation, little person on duty and regional centralized control' on a wind turbine generator and a box type transformer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (7)
1. A combined electrical system of a land double-fed wind turbine generator and a box-type transformer is characterized in that a circuit breaker is arranged on a main loop between a wind turbine generator and the box-type transformer, a distribution transformer is connected between the low-voltage side of the box-type transformer and the circuit breaker in parallel, the distribution transformer is electrically connected with a wind turbine generator load, a box-type transformer load and a UPS power supply, and the UPS power supply supplies power to a wind turbine generator and a secondary loop of a controller, a contactor and the circuit breaker of the box-type transformer.
2. The combined electrical system of claim 1, wherein a knife switch is disposed between the wind turbine and the box transformer, and the knife switch is mounted on the tower bottom of the wind turbine.
3. The combined electrical system of claim 1, wherein a first current transformer is disposed on the main loop from the wind turbine to the box transformer, a second current transformer is disposed on the stator current output line of the wind turbine, and the integrated protection device is electrically connected to the first current transformer, the second current transformer and the breaker respectively, and controls the breaker to trip using the low-voltage side current of the box transformer and the stator current of the wind turbine as input signals, and is connected to the monitoring system of the booster station through the switch and the optical fiber.
4. The combined electrical system of onshore double-fed wind turbine generator and box transformer as claimed in claim 3, wherein the integrated protection device and exchanger are installed at the tower bottom of the wind turbine generator.
5. The combined electrical system of claim 1, wherein the distribution transformer is a 690V/400V transformer.
6. The combined electrical system of claim 1, wherein the distribution transformer supplies power to the box transformer loads, the wind turbine loads, and the UPS power source through a box substation panel and a fan panel.
7. The combined electrical system of claim 1, wherein a grid-connected contactor is disposed on a stator current output line of the wind turbine, and a grid-side contactor is disposed on a rotor current output line of the wind turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640601.0A CN112670965A (en) | 2020-12-31 | 2020-12-31 | Land double-fed wind turbine generator and box-type transformer combined electrical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640601.0A CN112670965A (en) | 2020-12-31 | 2020-12-31 | Land double-fed wind turbine generator and box-type transformer combined electrical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112670965A true CN112670965A (en) | 2021-04-16 |
Family
ID=75413948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011640601.0A Pending CN112670965A (en) | 2020-12-31 | 2020-12-31 | Land double-fed wind turbine generator and box-type transformer combined electrical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112670965A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488964A (en) * | 2021-07-27 | 2021-10-08 | 西安热工研究院有限公司 | System and method for protecting high-speed permanent magnet wind driven generator and outgoing cable by electric quantity |
| CN113595032A (en) * | 2021-07-27 | 2021-11-02 | 西安热工研究院有限公司 | System and method for protecting double-fed wind driven generator and outgoing cable by electric quantity |
-
2020
- 2020-12-31 CN CN202011640601.0A patent/CN112670965A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488964A (en) * | 2021-07-27 | 2021-10-08 | 西安热工研究院有限公司 | System and method for protecting high-speed permanent magnet wind driven generator and outgoing cable by electric quantity |
| CN113595032A (en) * | 2021-07-27 | 2021-11-02 | 西安热工研究院有限公司 | System and method for protecting double-fed wind driven generator and outgoing cable by electric quantity |
| CN113488964B (en) * | 2021-07-27 | 2023-02-21 | 西安热工研究院有限公司 | System and method for protecting high-speed permanent magnet wind driven generator and outgoing cable by electric quantity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chompoo-Inwai et al. | System impact study for the interconnection of wind generation and utility system | |
| WO2014005550A1 (en) | Simulation verification method for low voltage ride-through capability of wind farm | |
| CN112670965A (en) | Land double-fed wind turbine generator and box-type transformer combined electrical system | |
| CN113452011B (en) | Double-connection transformer offshore wind power direct current sending-out system and control method | |
| CN103343729A (en) | Integrated wind power generation electrical system | |
| CN113644661B (en) | Low-voltage control parallel compensation device at tail end of low-voltage distribution network | |
| CN107508314B (en) | Distributed photovoltaic protection system and protection method | |
| CN105391033A (en) | Layered domain-partitioned anti-islanding protection method for large-scale wind power generation | |
| CN112701665A (en) | Electrical protection device and method for onshore double-fed wind turbine generator and box-type transformer | |
| CN106655254B (en) | A kind of inverter and transformer integrated equipment | |
| CN210957911U (en) | High-voltage station service system | |
| CN112865034A (en) | Selective relay protection configuration method | |
| CN210273512U (en) | Micro-grid control system | |
| Li et al. | Fault ride-through demand of large-scale islanded renewable energy connected to VSC-HVDC system and its key technologies | |
| CN112751360A (en) | Offshore double-fed wind turbine generator and matched boosting equipment electrical system thereof | |
| CN112952796A (en) | Power utilization system wiring of offshore flexible direct current converter station and operation method thereof | |
| CN111907379A (en) | 10kV/27.5kV electrified railway auxiliary traction power supply | |
| CN219627373U (en) | Double-fed converter stator grid-connected contactor control device | |
| CN111181244A (en) | Service power interconnection system among multiple thermal power generating units and operation control method | |
| CN220066889U (en) | Adjustable intrinsic safety type voltage sag prevention device | |
| CN110912179A (en) | Fault-tolerant control method of double-fed wind turbine generator, double-fed wind turbine generator and double-fed motor | |
| CN219145022U (en) | Power system topology structure for enterprise plant | |
| CN220156233U (en) | Distributed photovoltaic grid-connected power generation self-absorption system | |
| CN216851313U (en) | Wind-powered electricity generation field current collection circuit of circuit breaker converges system on area post | |
| CN219627370U (en) | Substation station power consumption system of multistage bus |
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 |