New energy effective capacity calculation method and system considering grid constraint

A technology of effective capacity and calculation method, applied in calculation, AC network circuit, prediction, etc., can solve the problem of large error in effective capacity and achieve the effect of convenient calculation

Active Publication Date: 2021-01-05
NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • New energy effective capacity calculation method and system considering grid constraint
  • New energy effective capacity calculation method and system considering grid constraint
  • New energy effective capacity calculation method and system considering grid constraint

Examples

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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 invention provides a new energy effective capacity calculation method and system considering grid constraint. The method comprises the following steps: collecting new energy power generation installation scale, output characteristic data and subsystem peak regulation cost in a researched system, wherein the total cost of the system is composed of the sum of the cost of each subsystem, and an objective function is constructed with the minimum peak regulation cost of the whole system; and establishing a mathematical model by considering the electricity abandoning rate constraint and the line / section transmission capability constraint, and calculating and solving through a simplex method to obtain the optimal effective capacity of the system. According to given subsystem new energy outputdata, in combination with the peak load regulation cost of the subsystems, the minimum total peak load regulation cost of the whole system is taken as an objective function, constraints such as the electricity abandoning rate and the power transmission capacity are considered, an optimization model is solved through a simplex method, and the effective capacity of the system is obtained. Accordingto the method, the effective capacity of the whole system and each subsystem can be obtained, so that the peak regulation capacity required by each system can be determined, and reference is providedfor 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 Applications(China)
IPC IPC(8): H02J3/00G06Q10/04G06Q50/06
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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