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Control method of voltage sag comprehensive treatment equipment based on sensitive users

A voltage sag and comprehensive treatment technology, applied in AC network voltage adjustment, flexible AC transmission system, reactive power compensation, etc., can solve problems such as ineffective control of voltage sag, sensitive loads cannot work normally, and slow control speed. Achieve the effects of improving dynamic response characteristics and steady-state response characteristics, meeting sensitive load requirements, and controlling voltage sags

Active Publication Date: 2016-03-30
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, when the voltage sag occurs in the system, the operating point of the equipment changes, and the original parameter control speed is slow, and the voltage sag cannot be effectively controlled, which may cause sensitive loads to fail to work normally, so it is necessary to improve this

Method used

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  • Control method of voltage sag comprehensive treatment equipment based on sensitive users
  • Control method of voltage sag comprehensive treatment equipment based on sensitive users

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] see figure 1 , the voltage sag comprehensive control equipment includes STATCOM2, voltage sensor and PI regulator 3, STATCOM2 is connected to the sensitive user, that is, load 1, the voltage sensor is connected to the circuit of load 1, and the load voltage V detected by the voltage sensor f It is connected to PI regulator 3 through a multiplier and divider, and PI regulator 3 is also connected to STATCOM2. PI regulator 3 converts and forms a PWM signal, and sends the PWM signal to STATCOM2, thereby controlling STATCOM2 to perform capacity compensation on load 1. figure 1 in, V fabc is the three-phase voltage of the load, I Cabc is the three-phase compensation current of STATCOM2, V ref for the rated voltage.

[0020] see again figure 2 , a control method for sensitive user-based voltage sag comprehensive control equipment, comprising the following steps:

[0...

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Abstract

The invention discloses a comprehensive voltage sag treatment device control method based on a sensitive user. To solve the voltage sag problem of the sensitive user, different control parameters are adopted for different STATCOM compensation stages, the STATCOM dynamic response characteristic and the stable response characteristic can be effectively improved, a device can stably run, the reactive power can be rapidly responded and offset, the voltage sag problem can be effectively solved, and the sensitive load demand can be met.

Description

technical field [0001] The invention relates to a control method of voltage sag control equipment, in particular to a control method of voltage sag comprehensive control equipment based on sensitive users. Background technique [0002] The power quality problem is an important direction of power system research, and voltage sag is the most frequent power quality problem that occurs during the operation of the power system. According to the statistics of the Electric Power Research Institute (EPRI), more than 90% of power quality problems are caused by voltage sags. Voltage sags occur frequently and are very harmful. In recent years, with the development of social economy, users' requirements for power quality are also increasing. Voltage sag will cause some sensitive loads such as precision manufacturing plants, computers, and medical equipment to fail to work normally, causing huge social and economic losses, and even threatening human life. [0003] STATCOM (Static Var ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/10Y02E40/30
Inventor 黄建涛余志文艾芊王大成陆敏安吴继健张红燕刘尹沈珍顾华浦枢张健高宁超张雪莉沈会
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO