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An island-type microgrid real-time dispatching energy management system

An energy management system and real-time scheduling technology, applied in current collectors, photovoltaic power generation, electric vehicles, etc., can solve problems such as reducing battery life, improve safety, improve power supply reliability, and ensure safe and stable operation.

Active Publication Date: 2018-06-22
NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make the system operate safely and effectively, batteries with a certain capacity are often configured in the microgrid to cut peaks and fill valleys to improve the utilization rate of renewable energy. However, overcharging or overdischarging the batteries in bad weather will greatly reduce the battery life. service life

Method used

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  • An island-type microgrid real-time dispatching energy management system
  • An island-type microgrid real-time dispatching energy management system
  • An island-type microgrid real-time dispatching energy management system

Examples

Experimental program
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Effect test

Embodiment

[0056] figure 1 In the shown embodiment, the power converter is the DC converter connecting the power bus with the photovoltaic power generation unit, the wind power generation unit and the DC load, the rectifier converter connected with the power bus with the diesel engine and the storage battery, and the one connected with the power bus with the AC load. inverter.

[0057] The weather information data received by the predictive control unit includes weather forecast information data and weather forecast information data in a short period of time in the future;

[0058] The prediction control unit calculates the output power and load demand of the photovoltaic power generation unit and the wind power generation unit by using the neural network prediction method and the autoregressive model on a day-by-day basis, and obtains the day-ahead forecast data;

[0059] The predictive control unit uses the BP neural network predictive algorithm and autoregressive model to calculate t...

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Abstract

The invention provides an isolated island microgrid real-time schedule energy management system which comprises an energy management unit, a real-time monitoring unit, a prediction control unit and a distributed unit circuit breaker. A microgrid comprises power generating units, a battery and a load, wherein the power generating units, the battery and the load are respectively connected with a power bus through a power converter. The real-time monitoring unit acquires the running state of each power generation unit and the battery. The prediction control unit predicts the output power and the load demand of each power generation unit according to current weather information data and historical load data. According to received microgrid running data and prediction result data, the energy management unit calculates the running state and the output power of each power generation unit of next time by taking the minimum system running cost as an objective function and safe system running as a constraint condition. Accordingly, the distributed unit circuit breaker controls each power generating unit to transmit power to a power grid. According to the invention, the influence of uncertain factors of weather conditions, load fluctuations and the like on the running of the system can be reduced, and the running reliability of the microgrid is improved.

Description

technical field [0001] The invention relates to the technical field of dispatching and management of an island-type micro-grid, in particular to a real-time dispatching energy management system for an island-type micro-grid. Background technique [0002] With the country's strong support for the use of renewable energy, more and more micro-grid projects have been built, especially island-type micro-grids used in remote areas, industrial parks, schools, and hospitals have received more and more attention . [0003] With the construction of a large number of island-type micro-grids, there will be problems, such as the impact of intermittent and random output power of renewable energy on the power balance of the system, how to effectively use renewable energy in the system, and the economic operation of the system. Problems, how to schedule the output power of each distributed power generation unit in real time during the system operation, how to effectively extend the service...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/10H02J7/35H02J3/38H02J3/46H02J3/32H02J1/14
CPCH02J1/10H02J1/14H02J3/003H02J3/32H02J3/381H02J3/385H02J3/386H02J3/388H02J3/46H02J7/35H02J2203/20Y02E10/56Y02E10/76Y02P90/50
Inventor 檀庭方付豪李靖霞王涛吴世伟张哲王紫东刘文彪纪陵
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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