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A distribution network risk assessment method with a distributed photovoltaic power source

A distributed photovoltaic and distributed power supply technology, applied in the direction of resources, electrical components, circuit devices, etc., can solve problems such as ripple effects and complex grid structures, and achieve fast and accurate risk assessment effects

Inactive Publication Date: 2019-01-08
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The structure of the power grid is complex, and once a power outage occurs, it will quickly spread to a large area

Method used

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  • A distribution network risk assessment method with a distributed photovoltaic power source
  • A distribution network risk assessment method with a distributed photovoltaic power source
  • A distribution network risk assessment method with a distributed photovoltaic power source

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0034] Considering that after the distributed photovoltaic power source is connected to the distribution network, it will have a certain impact on the node voltage and branch power flow of the distribution network. To ensure the healthy and orderly development of the distributed photovoltaic Quantitative analysis of network impact. The invention provides a distribution network risk assessment method containing distributed photovoltaic power sources. The method first establishes a distribution network risk assessment model containing distributed photovoltaic The influence of node volt...

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Abstract

The invention relates to a distribution network risk assessment method comprising a distributed photovoltaic power source, the method comprising the following steps: 1) obtaining distribution networkcomponent parameters; 2) establishing a photovoltaic power generation stochastic model base on that component parameters of the distribution network; 3) carrying out sampling to obtain distributed power output based on that photovoltaic power generation stochastic model; 4) taking the sampled distributed power output as a negative load node to carry out power flow calculation, and obtaining powerflow results under different distributed power output; 5) according to the probability distribution of the power flow result, calculating the value of the over-limit risk index of the distribution network, and obtaining the distribution network risk assessment result. Compare with the prior art, the method considers the randomness of the distributed photovoltaic generation and the load, and can quickly and accurately carry out the risk assessment of the distribution network.

Description

technical field [0001] The invention relates to a power grid security acquisition technology, in particular to a risk assessment method for a distribution network containing distributed photovoltaic power sources. Background technique [0002] Grid security, as a representation of the grid's ability to resist disturbances such as faults, directly reflects the strength of the grid and its ability to provide uninterrupted power to users. As an important part of the safe operation of the entire power grid, the distribution network with distributed photovoltaic power generation has achieved great development. Because of its close relationship with users, its safe operation is related to the efficiency and quality of power consumption of users. Therefore, The distribution network with distributed power generation faces considerable potential risk factors in its construction process, which cannot be ignored. Power failure will not only cause fluctuations in the normal operation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06H02J3/00
CPCG06Q10/0635G06Q50/06H02J3/00H02J3/003
Inventor 华思明谭琪明温兴文计崔刁昶顾嘉斌舒佳弛周国发闵波
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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