Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation

A technology of voltage collapse and power system, applied in the direction of system integration technology, information technology support system, instrument, etc.

Inactive Publication Date: 2016-03-30
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

These are to obtain the static safety region of the power system by obtaining the deterministic voltage collapse point, and no research has been carried out from the perspective of the voltage collapse point that considers the random fuzzy injection of wind power active power into the power system.

Method used

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  • Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation
  • Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation
  • Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation

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Embodiment Construction

[0022] The present invention comprises the following steps:

[0023] 1. Stochastic fuzzy uncertainty modeling of wind power output

[0024] 1) Establish a random fuzzy uncertainty model of wind speed

[0025] According to the actual multi-year wind speed data, the probability distribution shape parameter k of the daily wind speed probability distribution parameter can be extracted using the triangular fuzzy variable ξ k =(1.14,1.75,3.64) means that the scale parameter c can adopt the trapezoidal fuzzy variable ξ c =(2.95, 4.40, 6.40, 8.22), the corresponding membership functions can be expressed by formulas (1) and (2) respectively:

[0026]

[0027]

[0028] According to the fuzzy and uncertain characteristics of daily wind speed probability distribution parameters extracted above and their membership functions, a random fuzzy and uncertain model of daily wind speed is established, and a parameter that satisfies Pos{} > 0 is extracted in the respective confidence inte...

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Abstract

The invention discloses a voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation, and relates to the field of a power system. In a wind power output random fuzzy injection power system, dancing system P-V feature curves are solved according to continuous trends, a voltage collapse point of each P-V curve is found, probability distribution which voltage values Vcr and lambda values at the collapse points obey are respectively fitted; then membership functions of probability distribution function parameters are respectively found through multiple fitting, random fuzzy features of the voltage collapse points are described by use of opportunity measurement, and uncertainty descriptions for positions of fluctuated voltage collapse points are obtained. The method provided by the invention can provide a new thinking approach for later calculation of a power system static-state safety domain, provides a base for calculation of a power system safety domain more according with actual wind power injection and represents an important reference for power scheduling personnel in safe and stable operation of the power system.

Description

technical field [0001] The invention belongs to the field of safe and stable operation of power systems, and considers multiple uncertainties of wind power injected into the power system, a method for solving fluctuating voltage collapse points. Background technique [0002] With people's demand for new energy development, wind power has been valued as a clean and renewable energy. The total installed capacity of wind power in the current power system continues to rise, and the use of wind power is also continuing to follow up. The impact of multiple uncertainties of wind power output on the power grid is also becoming more and more obvious. Considering the impact of wind power output on the static security of the power grid is very important for maintaining the security and stability of the power system and improving the utilization of wind power. [0003] The literature "Review on the Impact of Wind Power Uncertainty on Power Systems" pointed out that uncertainty has both...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06Y02E40/70Y04S10/50
Inventor 马瑞李默
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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