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A method and system for coordinate dispatch of distribution network containing energy storage

A technology of distribution network and energy storage device, which is applied in the direction of energy reserve, circuit device, AC network circuit, etc., can solve the problems of transformer overload, voltage over-limit, large power grid impact, etc.

Active Publication Date: 2018-12-21
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of randomness and volatility in the output of renewable energy such as wind power, their large-scale access may cause the exchange power between the distribution network and the large power grid to seriously deviate from its day-ahead dispatch plan. If this deviation is fully borne by the large power grid , will cause a certain impact on the large power grid, such as voltage over-limit, transformer overload, etc.

Method used

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  • A method and system for coordinate dispatch of distribution network containing energy storage
  • A method and system for coordinate dispatch of distribution network containing energy storage
  • A method and system for coordinate dispatch of distribution network containing energy storage

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Embodiment 1

[0073] A flow diagram of a method for coordinating and dispatching a power distribution network with energy storage provided by the present invention is as follows: figure 1 shown, including:

[0074] Step 1: In the day-ahead scheduling stage, according to the day-ahead forecast power data, probability distribution and electric load forecast data of renewable energy, with the goal of minimizing the daily operating cost of the distribution network, determine the output plan of the diesel generator and the distribution network The day-ahead scheduling plan for exchanging power, and sending the output plan of the diesel generator to the diesel engine for execution;

[0075] Step 2: In the intraday scheduling stage, each time period is based on the forecast power data of renewable energy and the day-ahead scheduling plan, with the goal of minimizing the deviation of the exchange power of the distribution network, and determining the output plan of the energy storage device;

[00...

Embodiment 2

[0127]Based on the same inventive concept, the present invention also provides a coordinated dispatching system for distribution networks with energy storage. Since the principle of solving technical problems of these devices is similar to the coordinated dispatching method for distribution networks with energy storage, repeated descriptions will not be repeated here.

[0128] The basic structure of the system is as Figure 4 shown, including:

[0129] Day-ahead planning module, intraday planning module and execution module;

[0130] Among them, the day-ahead planning module, in the day-ahead scheduling stage, according to the day-ahead forecast power data, probability distribution and electric load forecast data of renewable energy, with the goal of minimizing the daily operating cost of the distribution network, determines the output plan and output of diesel generators. The day-ahead scheduling plan of the exchange power of the distribution network, and the output plan of ...

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Abstract

A method and system for coordinate dispatch of distribution network containing energy storage are provided, In the day-ahead dispatching stage, according to the day-ahead forecasted power data, probability distribution and load forecasting data of renewable energy, the output plan of diesel generator and the day-ahead dispatching plan of exchanged power of distribution network are determined and executed in order to minimize the daily operating cost of distribution network. In the intra-day dispatching stage, the output plan of the energy storage device is determined according to the predictedpower data of the renewable energy period and the day-ahead dispatching plan, aiming at minimizing the deviation of the exchanged power in the distribution network. The output plan of the energy storage device is executed cyclically until the dispatch is completed. The method and the system can reduce the operation cost of the distribution network by energy storage participating in the day-aheaddispatching, and can stabilize the power fluctuation between the distribution network and the large power network caused by the renewable energy prediction error, improve the controllability of the distribution network, and reduce the impact on the large power network.

Description

technical field [0001] The invention belongs to the technical field of distribution network operation control, and in particular relates to a method and system for coordinating and dispatching a distribution network with energy storage. Background technique [0002] In the context of the development of the Energy Internet, a large number of distributed power sources, distributed energy storage, and controllable loads are connected to the power grid, posing new challenges to the operation of the power grid. Through advanced information and automation technology, the active distribution network can actively manage the supply-side and demand-side resources in the region to achieve efficient, clean and safe utilization of energy, and can effectively solve the problem of large-scale distributed power access. In the distribution network, energy storage is the key equipment to achieve efficient energy utilization and safe operation of the system. It breaks the asynchronous nature o...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/46
CPCH02J3/32H02J3/46H02J3/003H02J2203/20Y02E70/30
Inventor 徐毅虎吴鸣寇凌峰屈小云侯小刚李俊杰
Owner CHINA ELECTRIC POWER RES INST
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