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Network-constrained power grid reserve capacity deduction calculation method and related device

A technology of reserve capacity and network constraints, applied in circuit devices, AC network circuits, electrical components, etc., can solve problems such as the deduction and quantification of reserve capacity, the inability to apply grid reserve adjustment optimization well, and the inability to form descriptions.

Active Publication Date: 2020-04-17
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This application provides a network-constrained power grid reserve capacity deduction calculation method and related devices, which are used to solve the problem of quantifying the system's reserve capacity deduction in the existing research on reserve capacity under network constraints, and cannot form a more scientific However, the accurate description leads to technical problems that cannot be well applied to the actual power grid backup regulation optimization process

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  • Network-constrained power grid reserve capacity deduction calculation method and related device
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  • Network-constrained power grid reserve capacity deduction calculation method and related device

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Embodiment 1

[0042] For ease of understanding, see figure 1 , Embodiment 1 of a network-constrained power grid reserve capacity deduction calculation method provided by the present application, including:

[0043] Step 101, arrange all the units in ascending order according to the sensitivity.

[0044] It should be noted that all units in the plant have sensitivity coefficients, so all units can be arranged in ascending order of sensitivity, so that the unit selected first and involved in the calculation is the unit with the least sensitivity.

[0045] Step 102, calculating the power flow value of the network section of each unit under the first maximum adjustable output.

[0046] Step 103, sequentially comparing the power flow value of the network section with the threshold value, and if the power flow value is smaller than the threshold value, sequentially accumulating the power flow value.

[0047] Step 104 , when the accumulated total power flow value is greater than the threshold va...

Embodiment 2

[0053] For ease of understanding, see figure 2 , the embodiment of the present application provides a second embodiment of the network-constrained power grid reserve capacity deduction calculation method, including:

[0054] Step 201. Calculate the first maximum adjustable output of each unit in the plant.

[0055] It should be noted that the adjustable output refers to the remaining power generation output value of the unit, that is, the power generation margin, which is an important indicator to measure the remaining power generation capacity of the grid-connected unit. It is convenient to calculate and calculate the maximum adjustable output of all units in the plant. Subsequent calculations.

[0056] Step 202 , correcting the first maximum adjustable output of each unit according to unit failure, heat supply limitation of cogeneration unit and water head limitation of hydropower unit.

[0057] It should be noted that the maximum adjustable output is generally obtained b...

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Abstract

The invention discloses a network-constrained power grid reserve capacity deduction calculation method and a related device. The method comprises the steps of: allowing all the units to be arranged inan ascending order according to sensitivity; calculating the power flow value of the network section of each unit under the first maximum adjustable output; comparing the power flow values of the network sections with a threshold value in sequence, and if the power flow values are smaller than the threshold value, accumulating the power flow values in sequence; when the accumulated total power flow value is larger than the threshold value, stopping power flow value accumulation, recording the position of the last unit participating in power flow value accumulation, and obtaining a limited unit; and subtracting the second maximum adjustable output of each limited unit from the original output of the limited unit, and performing accumulating to obtain the limited capacity of the network section. According to the method and the device, the technical problems that the reserve capacity of the system is difficult to deduct and quantify in the existing research on the reserve capacity underthe network constraint, and scientific and accurate description cannot be formed, so that the method and the device cannot be well applied to the actual power grid reserve adjustment and optimizationprocess are solved.

Description

technical field [0001] The present application relates to the technical field of power grid reserve capacity, and in particular to a network-constrained power grid reserve capacity deduction calculation method and a related device. Background technique [0002] With the gradual improvement of power grid construction, there are more and more control principles for the power system, and the control requirements are getting higher and higher, which leads to more and more restrictions on the power system, and the operation and backup requirements of the power system are limited by various The contradiction between the deduction of reserve capacity caused by various factors is more and more obvious. Among them, the impact of network constraints on the reserve capacity of the power system is particularly prominent. The reserve adjustment ability is extremely important, but it is difficult to quantify the reserve capacity reduction of the system in the existing research on reserve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 董超栾添瑞董锴何祥针孟子杰江贺彬郭俊宏郝文焕
Owner GUANGDONG POWER GRID CO LTD