Electricity-heat comprehensive energy system coordinated operation method considering thermal inertia

A technology of integrated energy system and operation method, applied in the field of coordinated operation of electric-thermal integrated energy system

Active Publication Date: 2020-05-22
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a method for coordinating the operation of the electric-thermal integrated energy system considering the thermal inertia, the purpose of which is to improve the operation dispatching ability of the electric-thermal integrated energy system due to the thermal inertia of the load in the heating system To reduce the problem of weakening, fully consider and quantify the thermal inertia of CHP units, electric boilers, and heating pipe networks in the electric-thermal integrated energy system, and reconsider the operation scheduling problem of the electric-thermal integrated energy system on this basis Solve the solution to make the electric-thermal integrated energy system operate more efficiently and economically, and improve the wind power absorption capacity of the electric-thermal integrated energy system

Method used

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  • Electricity-heat comprehensive energy system coordinated operation method considering thermal inertia
  • Electricity-heat comprehensive energy system coordinated operation method considering thermal inertia
  • Electricity-heat comprehensive energy system coordinated operation method considering thermal inertia

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Embodiment 1

[0082] The present invention is a coordinated operation method of an electric-thermal comprehensive energy system considering thermal inertia, and the specific steps are as follows:

[0083] Step 1: Based on the structure diagram of the electric-thermal comprehensive energy system, calculate the total output electric power of the CHP unit, the total heating extraction volume and the total coal consumption;

[0084] Step 2: Calculate the direct heating power of the electric boiler, and establish the constraints on the heat storage, power consumption and heat storage power of the electric boiler;

[0085] Step 3: Calculating the heat of the heating pipe network; including: calculating the thermal equation of the primary heating pipe network, the thermal equation of the secondary heating pipe network, and the thermal inertia equation of the heating load of users in the heating area of ​​the secondary pipe network;

[0086] Step 4: Based on steps 1 to 3, calculate the normal opera...

Embodiment 2

[0148] Taking the electric-thermal integrated energy system in a certain area in Northeast China as an example, the coordinated and optimized operation of the electric-thermal integrated energy system considering thermal inertia is carried out. The parameters of the pure condensing thermal power unit and the CHP unit in the electric-thermal integrated energy system are shown in Table 1. The length of the heating system pipeline and the area of ​​the heating building are shown in Table 2-1 and Table 2-2. The operating parameters of the heating system are as follows: As shown in Table 3, the electric boiler parameters are shown in Table 4. The allowable fluctuation range of the indoor temperature of the heating building is 18-22°C, and the allowable fluctuation range of the pipe network supply water temperature and return water temperature is 75-92°C and 42-60°C respectively.

[0149] Table 1 Parameters of pure condensing thermal power unit and CHP unit

[0150]

[0151] Tab...

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Abstract

The invention belongs to the technical field of power system operation and control, and particularly relates to an electricity-heat comprehensive energy system coordinated operation method consideringthermal inertia. The invention aims to improve the operation capability of an electricity-heat comprehensive energy system. The problems that due to the thermal inertia characteristic of an electricity-heat comprehensive energy system, certain heat supply delay exists in the links of heat production, heat supply and the like, and a power grid is difficult to dispatch in the heat supply period aresolved. Thermal inertia analysis is carried out on three units including a CHP unit, an electric boiler and a heat supply pipe network in the electricity-heat comprehensive energy system; an electricity-heat comprehensive energy system optimization operation model considering thermal inertia is established; the normal operation time interval of the thermal load of the electric-thermal integratedenergy system under the thermal inertia is calculated; and finally, an optimal operation model of the electricity-heat comprehensive energy system is established, the coordinated optimal operation capacity of the electricity-heat comprehensive energy system is improved, the problem that scheduling is difficult under the influence of thermal inertia of the electricity-heat comprehensive energy system is solved, and very high actual scheduling operation application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a method for coordinating the operation of an electric-thermal comprehensive energy system considering thermal inertia. Through analysis and modeling of the thermal inertia of each heating unit in the electric-thermal comprehensive energy system, the improvement The electric-thermal integrated energy system coordinates and optimizes the operation capacity. Background technique [0002] As a new comprehensive energy production and utilization method, the electric-thermal integrated energy system has the requirements of efficient energy utilization and meeting the requirements of a large number of electric-thermal loads. . However, each heating unit in the electric-thermal integrated energy system has thermal inertia characteristics, and there is a certain delay in heat supply in heat production and heat supply. -The operation and scheduling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q10/04G06Q50/06G06F119/08
CPCG06Q10/04G06Q50/06
Inventor 李家珏刘一涛孔剑虹陈守峰朱钰李志刚李显奇孙峰曾辉范维
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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