Emergency power control strategy in wind farm fault state
A technology of power control and fault state, applied in the direction of reducing/preventing power oscillation, and can solve the problems of uncontrollable wind turbine power and fluctuation of wind farm output power.
Active Publication Date: 2015-09-16
NINGXIA HUI AUTONOMOUS REGION ELECTRIC POWER DESIGN INST
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
With the continuous development of wind turbine technology, double-fed asynchronous wind turbines have gradually become the mainstream models of wind farms. When the transmission line connected to the wind farm fails, the double-fed asynchronous wind turbines will be put into crowbar protection. The power is uncontrollable, and it is easy to cause severe fluctuations in the output power of the wind farm
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
[0022] An emergency power control strategy in a wind farm failure state, for a wind farm with n wind turbines, includes the following steps:
[0023] ① Collect the short-term predicted power p of each fan in real time i 、Receive dispatching power command and obtain upper limit value of wind farm power where the power p i A variety of existing algorithms for short-term forecasting can be realized, so I will not repeat them here;
[0024] ② Record the following data when the wind farm fails: controllable wind turbines in the wind farm (that is, wind turbines that are not put into crowbar protection), uncontrollable wind turbines in the wind farm (that is, wind turbines that are put into crowbar protection), and cut off wind turbines (that is, wind turbines that are not connected to the grid for power generation);
[0025] ③ Calculate the power P that can be distributed by the wind farm 分配 , The active power P that the wind farm needs to emit set ;
[0026]
[0027]
...
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
An emergency power control strategy for a wind power plant in a fault state comprises the steps as follows: power predicted in short terms of all fans is collected in real time, a scheduling instruction is received, and an upper limit value of the power of the wind power plant is acquired; data like wind power plant controllable fans, wind power plant uncontrollable fans and removal fans are recorded when faults of the wind power plant occur; power which can be distributed by the wind power plant and active power required to be sent by the wind power plant are calculated; the power which can be distributed by the wind power plant is compared with the active power required to be sent by the wind power plant, and power distribution is performed; and system errors are removed, and the wind power plant operates in a normal power control manner. Aiming at influences caused due to the fact that crowbar protection of a double-fed asynchronous wind generation set rotor at the present, a novel control method is provided, so that the wind power plant realizes wind power plant transfer in emergency, dependence on power of an invested crowbar fan is reduced, the output power of a normal fan is increased, and the stability of the output power of the wind power plant is improved.
Description
Technical field: [0001] The invention relates to the technical field of wind power generation, in particular to an emergency power control strategy in a fault state of a wind farm. Background technique: [0002] The power system is a complex dynamic system, and its safe and stable operation essentially requires a balance between power generation and load demand at all times. If the power system cannot be effectively controlled and there is an imbalance between supply and demand, it will affect the reliable power consumption of the load and may even cause a large-scale accident in the system. [0003] Wind farm is an important power source of the power system and plays an important role in the power system. With the continuous development of wind turbine technology, double-fed asynchronous wind turbines have gradually become the mainstream models of wind farms. When the transmission line connected to the wind farm fails, the double-fed asynchronous wind turbines will be put ...
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): H02J3/24
Inventor 陈曦付江肖成刚李敬冯迎春何轶斌宋辉孔斌郭海滨
Owner NINGXIA HUI AUTONOMOUS REGION ELECTRIC POWER DESIGN INST