Power system steady-state power flow risk identification and prevention method, storage medium and equipment

A power system steady state and risk technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as branch power flow out of bounds, voltage fluctuations, and power system power flow uncertainty, and achieve fast and accurate calculation. , to ensure the effect of safe and stable operation

Active Publication Date: 2022-02-11
XI AN JIAOTONG UNIV +1
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Problems solved by technology

However, the uncertainty of wind power and photovoltaics leads to the uncertainty of the power system power flow, which in turn causes problems such as voltage fluctuations and branch power flow out of bounds, which brings huge challenges to power system dispatchers

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  • Power system steady-state power flow risk identification and prevention method, storage medium and equipment
  • Power system steady-state power flow risk identification and prevention method, storage medium and equipment
  • Power system steady-state power flow risk identification and prevention method, storage medium and equipment

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Embodiment Construction

[0055] The invention provides a steady-state power flow risk identification and prevention method considering the high proportion of new energy access, based on the historical wind speed, light intensity prediction data and actual data set, and the power characteristic curve of the new energy unit, for the new Probabilistic modeling of energy unit output prediction error; according to the current real-time forecast value of new energy unit output, the probability distribution of the corresponding prediction error is obtained, and the semi-invariant method is used for stochastic power flow calculation to obtain the probability distribution of each node voltage and branch power ; Judging whether there is a risk of voltage and power flow crossing the boundary at the time of prediction, if there is no risk, then calculate at the next moment, if there is risk, adjust the active power and reactive power of the generator set nearby, and perform random power flow calculation again until...

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Abstract

The invention discloses a power system steady-state tidal current risk identification and prevention method, storage medium and equipment, based on historical wind speed, light intensity prediction data and actual data sets, and the power characteristic curve of the new energy unit, to predict the output of the new energy unit Probabilistic modeling of the error; according to the real-time forecast value of the current new energy unit output, the probability distribution expression of the corresponding forecast error is obtained, and the semi-invariant method is used for stochastic power flow calculation to obtain the probability distribution of each node voltage and branch power; according to Probability distribution sets the threshold to judge whether there is a risk of voltage and power flow crossing the boundary at the time of prediction. If there is no risk, the calculation will be carried out at the next moment. risk so far. The invention can accurately and efficiently identify the region and degree of the steady-state power flow risk of the power system, provide risk prevention measures, and improve the safe and stable operation capability of the power system.

Description

technical field [0001] The invention belongs to the technical field of power system risk assessment, and specifically relates to a power system steady-state power flow risk identification and prevention method, storage medium and equipment considering high-proportion new energy access. Background technique [0002] Due to the characteristics of clean and environment-friendly wind power and photovoltaic power generation, my country's wind power and photovoltaic power generation will usher in the peak of large-scale construction. However, the uncertainty of wind power and photovoltaics leads to the uncertainty of the power system power flow, which in turn causes problems such as voltage fluctuations and branch power flow out of bounds, which brings huge challenges to power system dispatchers. [0003] On the afternoon of August 9, 2019, a large-scale power outage occurred in the UK. The sudden drop in the output of wind turbines in the Horn Offshore Wind Farm was one of the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2300/28H02J2300/22H02J2203/10H02J2203/20Y02A30/00
Inventor 别朝红林超凡李更丰黄格超孙思源刘菲陈晨吴子豪王辰曦唐露甜
Owner XI AN JIAOTONG UNIV
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