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Power system scheduling operation method and system considering synchronous rotational inertia level

A power system scheduling and synchronous rotation technology, applied in the direction of single-network parallel feeding arrangement, reducing/preventing power oscillation, etc., can solve the problem of accurately reflecting the ability of the power system to maintain frequency security and the value of renewable energy frequency support, etc. question

Active Publication Date: 2020-09-11
TSINGHUA UNIV
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Problems solved by technology

However, most of these models greatly simplify the frequency response characteristics of the system, and it is difficult to accurately reflect the ability of the power system to maintain frequency security at different times, and it is also difficult to flexibly consider the value of the frequency support of renewable energy in the system

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  • Power system scheduling operation method and system considering synchronous rotational inertia level
  • Power system scheduling operation method and system considering synchronous rotational inertia level
  • Power system scheduling operation method and system considering synchronous rotational inertia level

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Embodiment Construction

[0095] The present invention proposes a power system scheduling operation method and system considering the level of synchronous rotational inertia. The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0096] The present invention proposes a power system scheduling operation method that considers the level of synchronous rotational inertia. The overall process is as follows figure 1 shown, including the following steps:

[0097] 1) Establish a power system scheduling operation model considering the level of synchronous rotational inertia, which is composed of objective functions and constraints; including the following steps:

[0098] 1-1) Determine the objective function of the model:

[0099] The optimization objective of the power system dispatching operation model considering the level of synchronous rotational inertia is to minimize the operating cost of the power system:

[0100]

[0...

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Abstract

The invention provides a power system dispatching operation method and system considering a synchronous rotation inertia level, and belongs to the technical field of electric power system operation. The method comprises the following steps: firstly, establishing a power system dispatching operation model considering the synchronous rotation inertia level, and then linearizing a frequency responsecharacteristic function by adopting a piecewise linearization algorithm to obtain a linearization coefficient of a frequency safety constraint in the model; and solving the model to obtain an optimaldispatching operation result of the power system. According to the method, the problem of frequency stability of the power system caused by high-proportion renewable grid connection can be relieved, the synchronous rotation inertia level of the power system is maintained, the risk of frequency instability caused by access of a large number of renewable energy sources is reduced, and the safety andreliability of the power system under large disturbance are improved.

Description

technical field [0001] The invention provides a power system dispatching operation method and system considering the level of synchronous rotational inertia, and belongs to the technical field of power system operation. Background technique [0002] Under the dual pressure of lack of traditional fossil energy and global warming, the development of a large number of renewable energy power generation has become the common choice of all countries in the world. As of the end of 2018, my country's wind power installed capacity has reached 211GW, accounting for 35.70% of the global total installed capacity, and photovoltaic installed capacity is 175GW, accounting for 34.18% of the global total installed capacity, ranking first in the world. When renewable energy provides us with cleaner electric energy, it also brings a series of problems and challenges to the power system. Among them, the frequency stability problem caused by the decrease of the synchronous rotational inertia of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/24
CPCH02J3/24H02J3/46
Inventor 张子扬张宁杜尔顺康重庆
Owner TSINGHUA UNIV
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