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Power system stability control strategy comprising interruptible load and new energy

A power system and new energy technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as large investment and side effects, and achieve the effects of easy engineering implementation, improved system frequency stability, and accurate results

Active Publication Date: 2018-11-13
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods generally have disadvantages such as large investment and relatively large side effects.

Method used

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  • Power system stability control strategy comprising interruptible load and new energy
  • Power system stability control strategy comprising interruptible load and new energy
  • Power system stability control strategy comprising interruptible load and new energy

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Embodiment Construction

[0023] The evaluation method of the present invention includes interruptible load and new energy power system, comprising the following steps:

[0024] A power system stability control strategy containing interruptible loads and new energy sources, characterized in that the strategy includes the following steps:

[0025] 1) Connect new energy sources and interruptible loads in wind farms in normal power systems;

[0026] 2) Under normal circumstances, the new energy generates active power and reactive power, which can interrupt the load to consume active power;

[0027] 3) Detect voltage and frequency fluctuations during the fault period, detect active power from the wind farm and bus voltage frequency, and calculate the moment of inertia under the current system:

[0028]

[0029] Among them: H i is the generator inertia of the i-th machine, ω i is the rotational speed of the i-th machine. h s is the system inertia.

[0030] 4) Detection system real-time active power...

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Abstract

Disclosed is a power system stability control strategy comprising an interruptible load and new energy. The power system stability control strategy comprises the following steps that: 1) new energy and the interruptible load are connected in a wind power field of a normal power system; 2) under the normal condition, the new energy gives out active power and reactive power, and the interruptible load consumes active power; 3) in a fault period, voltage and frequency fluctuations are detected, and the active power and bus voltage frequency from the wind power plant are detected, and the rotational inertia of the current system is calculated; and 4) the real-time active power vacancy, a formula which is as shown in the specification, of the detection system is detected, and the reached frequency extreme value f is calculated, so that system frequency stability level is improved. Compared with the traditional analysis method, the method has the advantages that the system frequency stability level can be effectively judged; due to the fact that a monitoring module is only introduced into an original monitoring system, the control method is can perform engineering implementation moreeasily. The analysis method has the characteristics of being simple in calculation, accurate in result, easy to implement, high in engineering application value and the like.

Description

technical field [0001] The invention relates to the field of power system operation and transaction, and is a strategy for stabilizing power systems with interruptible loads and new energy sources, which is applied to power market transactions with interruptible loads and new energy consumption technologies. Background technique [0002] With the rapid development of the UHV power grid, large-scale new energy grid connection and the pilot and promotion of energy-saving power generation dispatching, the technical level and complexity of the power grid are getting higher and higher. The operation risk of the power grid, and improve the ability to analyze and deal with the risk of large power grid accidents. [0003] The promotion of grid information construction and the rapid development of grid real-time monitoring and early warning technology have rapidly increased the monitoring and dispatching information mastered by regulators. Online security and stability analysis has a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/386Y02E10/76
Inventor 金晓明李铁张建姜枫孙晨光崔岱唐俊刺梁晓赫冯占稳朱伟峰李峰王钟辉姜狄曾辉詹克明蔡壮杨万清
Owner STATE GRID CORP OF CHINA
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