Method for establishing multi-stage standby acquisition joint optimization model of power system

A joint optimization, power system technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as the decline in the proportion of traditional power sources, and achieve the effects of reducing backup costs, improving flexibility, and shortening recovery periods.

Pending Publication Date: 2022-05-10
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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AI Technical Summary

Problems solved by technology

However, with the substitution of new energy power sources for traditional power sources, the proportion of traditional power sources in operating capacity will continue to decline

Method used

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  • Method for establishing multi-stage standby acquisition joint optimization model of power system
  • Method for establishing multi-stage standby acquisition joint optimization model of power system
  • Method for establishing multi-stage standby acquisition joint optimization model of power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0106] Combined with a provincial power grid data design example, the simulation analysis of multi-level backup acquisition of power system is carried out. The power structure in this calculation example is shown in Table 1. Among them, the total installed capacity of thermal power units is 31580MW, including 72 units; figure 2 shown.

[0107] Table 1 Test system power structure

[0108]

[0109] The operation results obtained by the multi-level backup of the power system are as follows:

[0110] image 3shows the relationship between the load demand of the system at different times of the day and the power provided by each unit. It can be seen that the output of thermal power and wind power units is the main output in general, and the output of thermal power units is about 82.81% of the total demand. The output of wind power units is about 15.04% of the total demand, and the output of thermal power units accounts for the largest proportion. Hydropower and photovoltaic...

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Abstract

The invention provides a method for establishing a multi-stage standby acquisition joint optimization model of an electric power system, which comprises the following steps of: 1) defining standby requirements on four time scales according to an operation control process of the electric power system; 2) obtaining operation parameters of the thermal power and hydroelectric generating set, and establishing each-level reserve capacity constraint model of the thermal power and hydroelectric generating set; 3) acquiring operation parameters of lithium battery energy storage, and establishing a lithium battery energy storage operation and standby constraint model; and 4) establishing a multi-stage reserve obtaining joint optimization model under the condition of meeting the operation constraint of thermal power generating units, hydroelectric generating units and lithium battery energy storage and the capacity constraint of each stage of reserve, thereby realizing the optimal obtaining of each stage of reserve by exciting thermal power, hydroelectric power and energy storage to provide reserve of different time scales, ensuring that each stage of reserve of a power system is sufficient, and improving the reliability of the power system. The safety of the power grid is improved; meanwhile, the overall economy of each-level standby acquisition is ensured, and the operation efficiency of a power system is improved.

Description

technical field [0001] The invention relates to the field of electric power system operation, in particular to a joint optimization method for multi-stage standby acquisition of electric power system. Background technique [0002] In the context of energy transition, wind power and photovoltaics have developed rapidly. At the same time, in order to realize the large-scale configuration and transportation of electric energy, UHV lines are gradually becoming the main network frame of regional interconnection. The capacity of a single UHV line far exceeds the maximum capacity of traditional generator sets. The grid connection of large-scale intermittent new energy has brought huge demand for regulation backup due to its high uncertainty, and the large-capacity power shortage caused by UHV line failure has also brought huge demand for emergency backup. However, as new energy power sources replace traditional power sources, the proportion of traditional power sources in operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/46H02J3/24H02J3/32
CPCH02J3/0075H02J3/466H02J3/241H02J3/32H02J2203/20H02J2300/20H02J2300/24H02J2300/28
Inventor 郭长辉李程昊郝元钊李晓萌高泽吕泉刘明洋方舟黎量子曹晓璐张忠
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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