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New energy penetration rate assessment method based on probability power flow calculation

A probabilistic power flow calculation and new energy technology, applied in AC network circuits, AC network voltage adjustment, AC circuit layout for emergency treatment, etc.

Active Publication Date: 2016-10-12
STATE GRID GASU ELECTRIC POWER RES INST +4
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AI Technical Summary

Problems solved by technology

[0003] The internal planning of wind and solar power stations is mainly about the allocation of reactive power compensation devices. Insufficient reactive power compensation devices will cause voltage drops in the station, thereby affecting power quality; excessive reactive power compensation devices will cause waste of resources.
In addition, the voltage of new energy grid-connected points will also be affected by load fluctuations in the grid

Method used

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  • New energy penetration rate assessment method based on probability power flow calculation
  • New energy penetration rate assessment method based on probability power flow calculation
  • New energy penetration rate assessment method based on probability power flow calculation

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Embodiment 1

[0045] In an embodiment of the present invention, the steps are as figure 1 Shown.

[0046] Step 1 is to establish a probability distribution model of wind and solar power station power and load power, which specifically includes the following:

[0047] Assuming that the wind speed obeys the Weibull distribution with two parameters, the probability model is:

[0048] f ( x ) = b a ( x a ) b - 1 e [ - ( x a ) b ]

[0049] In the above formula, x is the wind speed, a and b respectively represent the two parameters of the Weibull distribution, a is the scale parameter, and b is the shape parameter;

[0050] Substituting the wind speed probability model into the following formula, the output power of the fan can be obtained by using the typical fan output power model shown in the following formula:

[0051] P w i n d = 0 W s V i P w i n d = P r · ...

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Abstract

The invention discloses a new energy penetration rate assessment method based on probability power flow calculation, and belongs to the technical field of power system automation. The method combines the impact on a power grid from the variability and instability of wind / solar hybrid generation and the external load level and the change condition thereof. The method takes static stable constraint and reactive power control of a power system as conditions, obtains the change range of the voltage of an output common grid-connected point of a wind / solar hybrid generation station through probability power flow calculation, takes the specified range of the voltage of the grid-connected point as the index, and carries out the assessment of the maximum capability that the wind / solar hybrid generation station is connected to the power grid. The method can improve the safe and stable operation level of the wind / solar hybrid generation station, effectively guarantees the generation of the wind / solar hybrid generation station, and improves the energy-saving and emission reduction benefits.

Description

Technical field [0001] The invention belongs to the technical field of power system automation, and specifically relates to a new energy penetration rate evaluation method based on probabilistic power flow calculation. Background technique [0002] The shortage of fossil energy and the increasingly serious air pollution have made mankind aware of the importance and urgency of sustainable development of energy. In recent years, renewable energy sources such as wind energy and solar energy have received extensive attention and vigorous development as clean energy sources. However, the large-scale integration of wind and solar energy into the grid, its volatility and randomness also bring great challenges to the stable operation of the grid. Variability and uncertainty are the two inherent factors of modern power systems. Deterministic power flow analysis methods can only analyze specific grid operation conditions. For example, when the system has the most serious failure, the resu...

Claims

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Application Information

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IPC IPC(8): H02J3/16H02J3/38
CPCH02J3/001H02J3/16H02J3/382H02J2203/20Y02E40/30
Inventor 陈振寰张柏林傅铮张昊天张东良常康李全茂王昊昊侯锐杰宋建光汪马翔韩杰吴峰张伟杨力张彦凯梁福波智勇拜润卿陈仕彬李养俊郝如海高磊乾维江郑小江李晓龙孙辰军魏明磊高岩
Owner STATE GRID GASU ELECTRIC POWER RES INST
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