Comprehensive coordination control method of photovoltaic power generation microgrid having weather prediction function

A photovoltaic power generation and weather forecasting technology, applied in the field of power system, can solve problems such as poor stability, achieve stable power consumption, ensure power consumption experience, and solve the effect of intermittent

Inactive Publication Date: 2016-06-15
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0005] In order to ensure sufficient power supply to users, reduce harmonic pollution, eliminate microgrid island effect, and overcome the shortcomings of poor stability of existing photovoltaic power generation microgrids during operation

Method used

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  • Comprehensive coordination control method of photovoltaic power generation microgrid having weather prediction function
  • Comprehensive coordination control method of photovoltaic power generation microgrid having weather prediction function
  • Comprehensive coordination control method of photovoltaic power generation microgrid having weather prediction function

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] refer to figure 2 As shown, first initialize the system, and then judge and predict the weather at this time. If the weather is sunny and the time period is daytime, the sun will be sufficient and there will be a large amount of power generation. In the morning, the power generation will gradually increase; at noon, the power generation will reach the maximum and remain basically unchanged; in the afternoon, the power generation will gradually decrease, corresponding to three time periods, X1 time period, X2 time period, and X3 time period. If the weather at this time is cloudy, rainy, snowy, foggy, etc., and the sun is insufficient, the power generation is basically 0.

[0030] refer to figure 1 , figure 2 and image 3 , the comparison between power generation and power consumption can be divided into 3 categories, A category is power generation is greate...

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Abstract

The invention provides a comprehensive coordination control method of a photovoltaic power generation microgrid having a weather prediction function. The photovoltaic power generation microgrid having the weather prediction function comprises a DC / AC inverter, a photovoltaic array and bidirectional DC / AC converter, a circuit breaker, a load and AC bus, an energy storage battery, a coordination controller, a control network connected with the coordination controller and the convertor and the circuit breaker, a power dispatching centre and a weather prediction module. Under the premise of ensuring sufficient power supply for a user, the method, through comprehensive application of weather judgment and prediction, power supply scheduling and energy storage device scheduling, enables the photovoltaic power generation microgrid to be prepared for adjustment in advance under the condition of weather judgment and prediction, thereby improving mode switching speed of the system for different situations and reducing system misoperation rate; and power quality and power supply reliability are ensured, and the load of the user is allowed to operate stably.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a comprehensive coordination control method for a photovoltaic power generation micro-grid with weather forecasting. Background technique [0002] Microgrid is a small low-voltage system composed of distributed generation, energy storage and load. The internal power supply of the microgrid is mainly clean energy, and the conversion of electric energy is mainly realized by power electronic equipment. Microgrid overcomes the shortcomings of randomness and intermittency of distributed power, and utilizes distributed power reasonably and effectively. Improve energy utilization, optimize energy structure, reduce environmental pollution; solve power supply problems in remote rural areas, reduce transmission capacity of large power grids, avoid line congestion, reduce line losses, and reduce investment in transmission and distribution lines; improve power supply security and Reliability, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38H02J3/32
CPCH02J3/00H02J3/005H02J3/32H02J3/383H02J3/388Y02A30/00Y02E10/56Y02E70/30
Inventor 徐惠勇吴兴校钮鑫温凯瑞吴晓伟
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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