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A new energy effective capacity calculation method and system considering grid constraints

A technology of effective capacity and calculation method, which is applied in the direction of calculation, AC network circuits, instruments, etc., can solve the problem of large error in effective capacity and achieve the effect of convenient calculation

Active Publication Date: 2022-04-01
NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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  • Description
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  • Application Information

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Problems solved by technology

[0003] There are more and more new energy types in the existing technology, and the effective capacity error will be large if the grid constraints are not considered

Method used

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  • A new energy effective capacity calculation method and system considering grid constraints
  • A new energy effective capacity calculation method and system considering grid constraints
  • A new energy effective capacity calculation method and system considering grid constraints

Examples

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Effect test

Embodiment

[0056] A power system consists of five subsystems, such as figure 2 shown. Analyze the effective capacity of its wind power.

[0057] The specific operation steps of this method are as follows:

[0058] (1) Collect data such as new energy power generation installed capacity, output characteristic data, and peak-shaving costs of different subsystems in the studied system:

[0059] Subsystem 1 is connected to 11 million kilowatts of wind power, subsystem 2 is connected to 14.5 million kilowatts of wind power, subsystem 3 is connected to 14 million kilowatts of wind power, subsystem 4 is connected to 15.5 million kilowatts of wind power, and subsystem 5 is connected to 30 million kilowatts of wind power.

[0060] Collect the theoretical power of 8760 wind power in a typical year, and obtain the time series of wind power generating power of each subsystem, and the generating power at the i-th moment is Its main characteristics are as follows: the wind power utilization hours ...

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Abstract

The present invention proposes a new energy effective capacity calculation method and system considering grid constraints, including the following steps: collecting new energy power generation installed capacity, output characteristic data, and subsystem peak-shaving costs in the studied system; the total cost of the system is calculated by The sum of the costs of each subsystem is composed, and the objective function is constructed with the minimum peak shaving cost of the whole system; a mathematical model is established considering the curtailment rate constraints and line / section transmission capacity constraints, and the optimal system effective capacity is obtained through simplex method calculation and solution. According to the given new energy output data of the subsystem, combined with the peak shaving cost of the subsystem, taking the minimum total peak shaving cost of the whole system as the objective function, considering the constraints of curtailment rate and transmission capacity, the optimization model is solved by the simplex method, and it is obtained effective capacity of the system. This method can obtain the effective capacity of the whole system and each subsystem, and then determine the peak-shaving capability required by each system, providing a reference for power supply planning.

Description

technical field [0001] The invention relates to the field of power grid planning, in particular to a method and system for calculating the effective capacity of new energy sources considering grid constraints. Background technique [0002] For new energy power stations in a certain area, the output of new energy has a certain probability distribution, and the probability of exceeding a given value may be very small. The wider the distribution of new energy power stations in statistics, the greater the number and installed capacity. The lower the value is, the fewer new energy power stations are counted, and the smaller the number and installed capacity are, the higher the given value is. On the one hand, in a wider range, the characteristics of new energy resources are complementary in time and space; on the other hand, new energy can be transmitted through the power grid to achieve cross-regional peak regulation and consumption. As the scale of new energy continues to incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04H02J3/00G06Q50/06
CPCH02J3/00G06Q10/04G06Q50/06H02J2203/20
Inventor 孙沛李雨田李丁傅旭胡斌张雨津范丽霞杨攀峰
Owner NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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