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AC/DC (Alternating Current/Direct Current) mixed micro-grid optimized operating method based on main-slave game model

A technology of AC-DC hybrid and game model, which is applied to AC network circuits, AC networks with the same frequency from different sources, AC network load balancing, etc., can solve problems affecting microgrid network loss and damage to the interests of power grid companies, etc. Achieve the effect of avoiding premature phenomenon and improving global search performance

Active Publication Date: 2017-05-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Problems solved by technology

The study found that the pursuit of maximizing photovoltaic utilization will affect the network loss of the microgrid, which will lead to the loss of the interests of the grid company

Method used

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  • AC/DC (Alternating Current/Direct Current) mixed micro-grid optimized operating method based on main-slave game model
  • AC/DC (Alternating Current/Direct Current) mixed micro-grid optimized operating method based on main-slave game model
  • AC/DC (Alternating Current/Direct Current) mixed micro-grid optimized operating method based on main-slave game model

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[0161] Taking an AC / DC hybrid microgrid demonstration project in Zhejiang as an example, the forecasting and modeling method proposed by the present invention is used for optimal scheduling. The demonstration project includes photovoltaic cells with a capacity of 2MW and an energy storage battery pack with a total capacity of 1MWh, and its maximum output power is 250kW; the AC area and the DC area are connected by 4 power flow controllers with a power of 250kW to simplify the structure Such as figure 1 shown.

[0162] Firstly, predict the photovoltaic and load output according to the following steps. Forecast results such as Figure 11 shown.

[0163] a) Read the weather and load data of 20 days before the forecast date;

[0164] b) Calculate the correlation coefficient between the historical data and the forecast day according to the meteorological data;

[0165] c) Select the 5 days with the highest correlation coefficient as similar days;

[0166] d) Eliminate bad dat...

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Abstract

The invention relates to an AC / DC (Alternating Current / Direct Current) mixed micro-grid optimized operating method based on a main-slave game model. The method comprises the following steps: acquiring weather data of an area in which a micro-grid is located such as illumination intensity, temperature and cloud cover, counting historical data of a photovoltaic power generation amount in the micro-grid, and predicting power outputted by a photovoltaic cell in an AC / DC mixed micro-grid in a next day by adopting a prediction method based on a typical trend; acquiring transmission power data at two sides of a bidirectional converter and a tendency controller in the AC / DC mixed micro-grid, and establishing a mathematic model of various devices in the AC / DC mixed micro-grid; dividing a day into various dispatching time periods, establishing a main-slave game model of cooperation of a photovoltaic operator and a grid company at each dispatching time period, wherein the main-slave game model comprises a photovoltaic utilization rate model maximizing the benefit of the photovoltaic operator and an AC / DC mixed micro-grid loss model minimizing the loss of the representative grid company; and improving the global searching performance of an algorithm by adopting a two-order oscillation particle swarm algorithm of an asynchronous variation learning factor. The AC / DC mixed micro-grid optimized operating method is high in applicability and high in prediction precision.

Description

technical field [0001] The invention relates to a multi-objective optimization operation method in an AC-DC hybrid microgrid. In particular, it relates to an optimal operation method of an AC / DC hybrid microgrid based on a master-slave game model. Background technique [0002] The massive consumption of fossil energy in the traditional power system has caused serious environmental damage. Based on this problem, new energy generation methods have been widely used. However, since new energy is usually affected by various weather factors, its output often fluctuates greatly. Its uncontrollability even brings adverse effects to the reliable and safe operation of power grid power supply. By integrating a variety of distributed power sources and loads, the microgrid becomes a controllable power area, thereby increasing the consumption rate of uncontrollable new energy generation. Therefore, the microgrid technology has been widely concerned by researchers at home and abroad. ...

Claims

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Application Information

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IPC IPC(8): H02J5/00H02J3/38H02J3/32H02J3/06
CPCH02J3/003H02J3/06H02J3/32H02J3/383H02J5/00H02J2203/20Y02E10/56Y02E70/30
Inventor 李鹏韩鹏飞陈安伟张斌周国华
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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