Low-frequency load shedding method for regional power grid with high wind power permeability
A regional power grid and low-frequency load shedding technology, which is applied in the direction of flicker reduction of AC network, electrical components, circuit devices, etc., can solve the problems of insufficient consideration of the system source-load frequency coupling characteristics, under-cutting and over-cutting, etc., to reduce undercutting Cutting and overcutting phenomena, ensuring effectiveness, and improving the effect of recovery speed
Pending Publication Date: 2022-06-21
NANJING UNIV OF POSTS & TELECOMM
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the under-cut and over-cut problems caused by insufficient consideration of the system source-load frequency coupling characteristics in the existing load shedding strategy, the present invention proposes a low-frequency load shedding method for the regional power grid with high wind power penetration rate, using the improved system The frequency response model accurately calculates the system power deficit and predicts the lowest point frequency, and formulates an adaptive load shedding strategy, which can effectively improve the accuracy of load shedding and reduce the probability of over-cutting and under-cutting
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
[0073] Below in conjunction with accompanying drawing, technical scheme of the present invention is further described:
[0074] The present invention proposes a low-frequency load shedding method for regional power grids with high wind power penetration, such as figure 1 shown, including the following steps:
[0075] Step A: According to the historical data of the wind power output of the regional power grid, the forecast result of the wind power output of the regional power grid for a period of time in the future is obtained, and the error probability distribution is given.
[0076] In the embodiment of the present invention, the structure of the wide area measurement system is as follows figure 2 shown, based on the measurement system of each area to control the center.
[0077] The wind power output historical data of the regional power grid is obtained through the wide-area measurement system, and the control center predicts the wind power output in the future. Usually,...
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 discloses a low-frequency load shedding method for a regional power grid with high wind power permeability, and the method comprises the steps: calculating the wind power permeability and load power compensation according to the wind power output historical data and frequency voltage characteristics of the regional power grid; the improved system frequency response model is updated according to wind power permeability and load power compensation; when it is detected that the frequency of the regional power grid drops, the actual power vacancy and the system lowest point frequency of the regional power grid are calculated through the updated system frequency response model; judging whether load shedding is started or not according to the lowest point frequency of the system, and if the load shedding is started, calculating the load shedding amount according to the actual power vacancy and the expected recovery frequency. According to the method, frequency drop can be effectively suppressed after a high-power vacancy accident occurs in a regional power grid with high wind power permeability, the precision of load removal can be improved, and the phenomena of overcut, undercut and the like are prevented.
Description
technical field [0001] The invention relates to a low-frequency load shedding method for a power grid in a high wind power penetration rate area, and belongs to the technical field of frequency stability control of large power grids. Background technique [0002] With the great development of China's wind power industry, large-scale wind power is integrated into the power grid. On the one hand, it replaces some conventional energy power generation equipment, saves fossil energy such as oil and coal, and reduces environmental pollution; Different characteristics bring a series of challenges to the safe and stable operation of the power system. With the continuous improvement of load randomness, load forecasting plays an extremely important role in the normal operation of the power system. How to deal with the uncertainty of load forecasting results has an important impact on the safe and stable economic operation of the power system. [0003] Low-frequency load shedding (UF...
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 IPC IPC(8): H02J3/00H02J3/24H02J3/38
CPCH02J3/002H02J3/24H02J3/241H02J3/381H02J3/004H02J2203/10H02J2203/20H02J2310/60H02J2300/28
Inventor 窦春霞朱文超岳东张占强张智俊袁超
Owner NANJING UNIV OF POSTS & TELECOMM