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A source-grid-load-storage coordination optimization method considering flexible active power constraints

A technology of active power, coordination and optimization, applied in energy storage, reducing/preventing power oscillation, climate sustainability, etc., can solve problems such as power frequency deviation, increase flexibility, improve new energy utilization, and reduce system operation cost effect

Active Publication Date: 2022-05-06
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the random fluctuation of large-scale new energy power generation and power load, the power imbalance will inevitably be generated in the system, which will affect the economic dispatch and frequency quality of the system. Although the frequency deviation is allowed to fluctuate within a certain range during system operation, As long as the frequency is within the technical standard range, a certain amount of power imbalance and a certain frequency deviation are allowed in the operation of the system, that is, there is a certain degree of flexibility in the operating state of the system; using this feature, the power imbalance and frequency deviation are used as the source network Flexible scheduling resources for load-storage optimization

Method used

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  • A source-grid-load-storage coordination optimization method considering flexible active power constraints
  • A source-grid-load-storage coordination optimization method considering flexible active power constraints
  • A source-grid-load-storage coordination optimization method considering flexible active power constraints

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Embodiment 1

[0042] See attached figure 1 As shown, the embodiment of the present invention discloses a source-grid-load-storage coordination optimization method considering flexible active power constraints, which is applied to a wind-solar-fire-storage combined power generation system, including:

[0043] Step S1: Obtain the flexible active power of the wind-solar-fire-storage combined power generation system at each moment, establish a system flexible active power balance model, and add power imbalance ΔP to the system flexible active power balance model t ;

[0044] Step S2: Using the characteristics of primary frequency modulation, a system flexible active power balance model including primary frequency modulation is obtained, and at the same time, the power imbalance is converted into a corresponding system frequency deviation model;

[0045] Step S3: Using the secondary frequency modulation characteristics, process the system flexible active power balance model including primary freq...

Embodiment 2

[0072] The system applied in this embodiment 2 refers to the attached figure 2 As shown, it specifically includes conventional thermal power units, energy storage systems, wind power and photovoltaic power generation units. The total installed capacity of conventional thermal power units is 800MW, and the operating data of the units are shown in Table 1.

[0073] Table 1 Operating parameters of conventional thermal power units

[0074]

[0075] The installed capacity of wind power is 250MW, the installed capacity of photovoltaic is 50MW, the setting parameters of demand response are shown in Table 2, the operating parameters of the energy storage system are shown in Table 3, and the unit regulation power K s = 500MW / Hz.

[0076] Table 2 Response output limit parameters

[0077]

[0078] Table 3 Operating parameters of energy storage system

[0079]

[0080] Assume a scheduling cycle is 24h, each scheduling period is 15min, a total of 96 moments. The system load f...

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Abstract

The invention discloses a source-grid-load-storage coordination optimization method considering flexible active power constraints, which is applied to a wind-solar-fire-storage combined power generation system, including: step S1: obtaining the flexible active power of the wind-solar-fired-storage combined power generation system at each moment, Establish a system flexible active power balance model, and at the same time add power imbalances to the system flexible active power balance model; Step S2: use the characteristics of primary frequency modulation to obtain a system flexible active power balance model that includes primary frequency modulation, and simultaneously add the power imbalance The measurement is converted into the corresponding system frequency deviation model; step S3: use the characteristics of secondary frequency modulation to process the system flexible active power balance model containing primary frequency modulation obtained in step S2, and obtain the flexible active power containing primary frequency modulation and secondary frequency modulation balance model and other steps; the present invention considers flexible power balance constraints, which can reduce wind and light curtailment and system operating costs.

Description

technical field [0001] The invention relates to the technical field of flexible load control, and more specifically relates to a source-network-load-storage coordination optimization method considering flexible active power constraints. Background technique [0002] At present, the extensive development and utilization of distributed energy such as wind energy and solar energy is one of the effective measures to solve global energy and environmental problems. universal attention from all countries. [0003] However, due to the random fluctuation of large-scale new energy power generation and power load, the power imbalance will inevitably be generated in the system, which will affect the economic dispatch and frequency quality of the system. Although the frequency deviation is allowed to fluctuate within a certain range during system operation, As long as the frequency is within the technical standard range, a certain amount of power imbalance and a certain frequency deviat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28H02J3/46H02J3/24H02J3/26H02J3/38
CPCH02J3/28H02J3/466H02J3/24H02J3/26H02J3/381H02J2203/20H02J2300/24H02J2300/28H02J2300/40Y02E10/56Y02E40/50Y02E70/30
Inventor 黄婧杰张志遥周任军杨洪明
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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