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Demand side resource coordination frequency control method and device

A frequency control, demand-side technology, applied in circuit devices, reducing/preventing power oscillations, power transmission AC networks, etc., can solve problems such as single demand-side resources, difficulty in achieving an ideal frequency modulation effect, and large air conditioning capacity.

Active Publication Date: 2021-03-19
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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Problems solved by technology

Generally, frequency regulation is carried out according to the resources on the power generation side and the input side. The resources on the demand side are numerous and diverse, and have various response characteristics. For example, electric vehicle resources have charging and discharging characteristics. When participating in system frequency regulation, the response speed is fast, which can not only participate in the power grid The frequency increase can also realize the system frequency down function, which can have a good frequency adjustment effect when the grid frequency fluctuates, but the single electric vehicle resource adjustment capacity is limited; the air conditioner has a large adjustment capacity, but has a delay characteristic
[0003]At present, most of the control methods use a single demand-side resource for frequency modulation. Due to the limitations of capacity and response time, it is difficult to achieve an ideal frequency modulation effect

Method used

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  • Demand side resource coordination frequency control method and device
  • Demand side resource coordination frequency control method and device
  • Demand side resource coordination frequency control method and device

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Embodiment Construction

[0097] The technical solutions and technical effects of the present invention will be further described in detail below in conjunction with the accompanying drawings of the present invention.

[0098] The embodiment of the present invention provides a resource coordination frequency control method on the demand side, which considers the intermittent characteristics of resources on the demand side, uses switching control, can fully integrate various resources on the demand side, and performs according to different power grid states when there are many types of demand response resources. Frequency modulation, the frequency is restored to stability as soon as possible after a power system failure. Moreover, a method for calculating control parameters that can stabilize the switched system is provided. The specific implementation will also be exemplified by air conditioners and electric vehicles with different demand-side resource characteristics.

[0099] The specific steps of t...

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Abstract

The invention provides a demand side resource coordination frequency control method, and belongs to the technical field of power system automation. The method comprises the steps of generating a demand side control frequency modulation model according to a system frequency modulation model and a frequency modulation switching rule function xi(t); setting a matrix function of the power generation side input voltage Ug and the demand side input voltage Udi; substituting the matrix function of the Ug and the matrix function of the Udi into the demand side control frequency modulation model to obtain a closed-loop system model of the demand side control frequency modulation model; and controlling the frequency of the system according to the closed-loop system model. The invention further provides a demand side resource coordination frequency control device.

Description

technical field [0001] The invention relates to the technical field of electric power system automation, in particular to a demand-side resource coordination frequency control method and device. Background technique [0002] When a fault event occurs in HVDC transmission, the power system needs to maintain system stability through frequency regulation. Generally, frequency regulation is carried out according to the resources on the power generation side and the input side. The resources on the demand side are numerous and diverse, and have various response characteristics. For example, electric vehicle resources have charging and discharging characteristics. When participating in system frequency regulation, the response speed is fast, which can not only participate in the power grid The frequency increase can also realize the system frequency down function, which can have a good frequency adjustment effect when the grid frequency fluctuates, but the single electric vehicle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/36H02J3/24
CPCH02J3/48H02J3/36H02J3/241H02J2203/20H02J2003/365Y02E60/60
Inventor 黄鸣宇张庆平罗海荣刘海涛尹亮
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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