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An Active Distribution Network Fault Recovery Strategy Considering Internal and External Games

A technology for active distribution network and distribution network faults, applied in the direction of power network operating system integration, electrical components, circuit devices, etc., can solve the problem of few applications for distribution network fault recovery

Active Publication Date: 2019-05-28
YANSHAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Game theory - game theory (game theory), also known as "game theory", is a branch of modern mathematics. It is an effective method to solve the behavior of decision-making subjects when there is interest or conflict. It has achieved good results in power system applications. effect, but rarely used in distribution network fault recovery

Method used

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  • An Active Distribution Network Fault Recovery Strategy Considering Internal and External Games
  • An Active Distribution Network Fault Recovery Strategy Considering Internal and External Games
  • An Active Distribution Network Fault Recovery Strategy Considering Internal and External Games

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Embodiment

[0104] It is known that the on-grid electricity price of a small distribution network is a=0.3 yuan / kW·h. The power supply side and the user side calculate their respective profits according to the load curve of the user's response to the peak-valley price; then change the peak-valley price and enter the next round of the game, the user responds again, and both parties calculate their respective profits again. The game is over until the benefits of both parties reach the maximum under the premise of satisfying all constraints.

[0105] The base price before and after optimizing the peak and valley time-of-use electricity price is a 0 =0.48 yuan / kW·h, a * 0 =0.49 yuan / kW·h, the rate before and after optimizing the peak and valley electricity price Q=10%, Q * =35%; using multiple linear regression to calculate the electricity price elasticity matrix of users is:

[0106]

[0107] This paper divides the peak and valley periods as follows: peak period: [10:00,14:00); valley...

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Abstract

The invention discloses an active distribution network failure recovery strategy considering inside and outside games. A failure recovery model considering the inside and outside double games is established through taking balance of interests of supply and requisitioning parties in a recovery process as the principle. In the outside game, an optimized time-of-use price is made through the game between a power grid and a user, so that the load peak is suppressed to reduce the pressure of recovery at the load peak. A dynamic game is solved through adoption of an inverse regression algorithm; in the inside game, collaborative recovery is carried out on an electric car, a distributed power supply and a controllable load based on an optimized load curve in order to realize maximum community of interest of the power grid and the user in the failure recovery. A modified ant colony algorithm is called to solve a failure recovery problem, and then each recovery scheme is taken as a game participant to transformer the failure recovery problem into a problem of the game between multiple recovery schemes. The power losses and the lowest node voltage value are taken as evaluation indexes, and the optimized scheme, namely a Nash equilibrium solution, is obtained through the games.

Description

technical field [0001] The invention relates to the field of active distribution network fault recovery, in particular to an active distribution network fault recovery strategy considering internal and external games. Background technique [0002] Fault recovery of distribution network during peak load period——During peak load period, the contradiction between supply and demand in some areas is still prominent. If substations, transmission lines and power supply equipment are in overload operation for a long time, the security of distribution network will be greatly threatened. The failure rate during the peak load period is much higher than the failure rate during other periods. It is very necessary to study the fault recovery strategy of the distribution network during the peak load period. However, there are not many studies on fault recovery of distribution network during peak load. [0003] Traditional distribution network fault recovery—distribution network fault reco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/14
CPCH02J3/00H02J3/001H02J3/14H02J2203/20H02J2310/64Y02B70/3225Y04S20/222
Inventor 杨丽君曹玉洁张子振
Owner YANSHAN UNIV
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