Microgrid running optimization system and method based on power and heat combined dispatching

A joint scheduling and operation optimization technology, applied in photovoltaic power generation, AC network load balancing, greenhouse gas reduction, etc., can solve problems such as unified coordinated scheduling of unfavorable electric and thermal loads, limited applications, and limited operation mode of cogeneration systems

Active Publication Date: 2015-06-24
SHANDONG UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The electricity and heat of the traditional electric heat distribution system are completely independent, which is not conducive to the unified coordination and dispatch of electric heat load;
[0006] 2) The operation mode of the combined heat and power system is relatively limited. The traditional combined heat and power generation works in the mode of "power determined by heat". which greatly limits its application
With the increasing electric heating peak-to-valley difference, this method can no longer meet t...

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  • Microgrid running optimization system and method based on power and heat combined dispatching
  • Microgrid running optimization system and method based on power and heat combined dispatching
  • Microgrid running optimization system and method based on power and heat combined dispatching

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Embodiment 1

[0161] The present invention selects an actual grid-connected microgrid in a certain place in northern my country as the research object. The grid includes units such as fans, photovoltaic cells, combined heat and power systems, electric boilers, fuel cells, electric energy storage, and thermal energy storage. The number of scheduling periods NT=24, the unit scheduling time Δt=1h, the output and interactive power of each unit within Δt are constant, and the interactive electricity price follows the real-time pricing (RTP)). Due to the long scheduling time of the unit, batteries are used for electric energy storage, and heat storage tanks are used for thermal energy storage. At the same time, in order to ensure the efficient use of energy, all the flue gas exhausted by the micro-turbine is supplied to the bromine cooler.

[0162] 3.1 Basic data

[0163] The relevant parameters of each unit of the microgrid are shown in Table 1. The initial start-up cost of the controllable uni...

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Abstract

The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.

Description

technical field [0001] The invention relates to a micro-grid operation optimization system and method based on combined electric-heat dispatching. Background technique [0002] With the adjustment of social energy structure, the development of power system and the maturity of energy storage technology, electric energy storage devices such as batteries and supercapacitors are widely used in power systems to improve the penetration rate of new energy and cooperate with other power sources in the network to realize electric energy. shaving peaks and filling valleys. In essence, the storage process of all energy (such as electrical energy, thermal energy and mechanical energy, etc.) can be called energy storage, but the current application of energy storage in power systems is actually limited to the storage of electrical energy, that is, the conversion of electrical energy into other forms of The energy is converted into electrical energy and fed back to the power system when ...

Claims

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Application Information

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IPC IPC(8): H02J3/28
CPCH02J3/28Y02E10/56Y02E60/36Y02E70/30
Inventor 梁军李正茂贠志皓
Owner SHANDONG UNIV
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