Wind power generation system and control method thereof
A technology of wind power generation system and power system, which is applied in the control of wind turbines, wind power generation, wind turbines, etc. It can solve problems such as circuit breaker equipment failure, inconsistent status of generator switch, failure judgment of non-synchronized circuit breaker, etc., to prevent Effects of overcurrent and overvoltage
Inactive Publication Date: 2013-02-27
HITACHI LTD
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, in the case of a fault in the synchronous circuit breaker of the AC excitation generator, the working mode of the generator is inconsistent with the switching state of the circuit breaker. Due to the influence of stator overvoltage and rotor overcurrent, equipment other than the circuit breaker also Problems that generate glitches
[0004] In Patent Document 1, it is disclosed that the system voltage and the stator voltage of the generator are used to judge the closure of the synchronous circuit breaker, but there is no precedent for the fault judgment of the synchronous circuit breaker
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] use figure 1 The device configuration of one embodiment of the present invention will be described. also, figure 1 It is a diagram that represents a polyphase AC circuit with a single-line connection diagram.
[0030] The wind power generator 200 is connected to the electric power system 100 via a transmission line. The wind power generator 200 is mainly composed of an AC excitation type generator 202 , blades 204 , a windmill control device 206 , a converter (excitation device) 208 , and a converter control device 210 .
[0031] Wing 204 is mechanically connected to the rotor of generator 202 via gear 212 . The rotor coils of the generator 202 are electrically connected to a converter 208 .
[0032] The windmill control device 206 performs wind speed detection, angle control of the blades 204, generation of an active power command value Pref, output of an operation / stop command value Run, and calculation of an operation command signal OPS such as a reactive power c...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a wind power generation system and a control method thereof. In an AC excited generator, whether a synchronous circuit breaker fault exists is judged by comparing a system voltage with a stator voltage, and the operation of a power converter is stopped if a fault exists so as to prevent overcurrent and overvoltage caused by the synchronous circuit breaker fault. In a case that the circuit breaker of the AC excited wind power generation goes wrong, the device and the control method detect the fault of the circuit breaker and stop the operation of the converter so as to protect the AC excited wind power generation from being damaged by overcurrent and overvoltage, and the device and the control method are characterized in that: the device is provided with a fault detecting unit for judging faults based on the working signal and the stator voltage of the circuit breaker and the system voltage, and the operation of the converter at the system side and the excited converter is stopped if a circuit breaker fault is detected.
Description
technical field [0001] The present invention relates to a method for detecting the failure of the synchronous circuit breaker and stopping the operation of the converter (converter) when the synchronous circuit breaker of the AC excitation type wind power generation system fails, thereby protecting the AC excitation type wind power generation system from failure. Devices damaged by overcurrent and overvoltage and their control methods. Background technique [0002] The AC excitation type generator used in the power generation device uses a converter to AC excite the rotor coil at the slip frequency (the difference between the system frequency and the rotation frequency), so that the voltage generated on the stator side can be generated by the excitation of the rotor. have the same frequency as the system frequency. In addition, there are advantages that the rotational speed of the wind turbine can be varied by varying the excitation frequency (slip frequency) of the rotor, ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/00F03D7/02H02H7/00H02H7/06
CPCY02E10/763Y02E10/723Y02E10/72
Inventor 中山靖章一濑雅哉松竹贡清藤康弘酒井洋满目黑光
Owner HITACHI LTD