[특허]Surge prevention control system for dynamic compressors

Surge prevention control system for dynamic compressors 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G05D-016/00
출원번호	US-0802781 (1997-02-18)
발명자 / 주소	McLeister Larry D.
출원인 / 주소	Woodward Governor Company
대리인 / 주소	Leydig, Voit & Mayer, Ltd.
인용정보	피인용 횟수 : 65 인용 특허 : 0

초록 ▼

A surge prevention control system for use with a dynamic compressor provides a multiple module controller for operating an anti-surge valve to bypass flow around the dynamic compressor. The multiple module controller includes a PID control module and a rate control module. The PID control module controls the anti-surge valve to control the operating point of the dynamic compressor about the surge control line. The rate control module uses the rate of approach of the operating point to the surge control line as its process variable. In the event of high rate of approach, the rate control module takes control of the anti-surge valve. The setpoint of the rate control module is adjusted to open the anti-surge valve to control the rate of approach to the surge control line to minimize the overshoot of the PID control.

대표청구항 ▼

[ What is claimed is:] [1.] A control system for avoiding surge in a dynamic compressor, the compressor having a variable operating point definable on a compressor map which includes a stable region, a surge region, a surge line separating the two regions, and a surge control line in the stable region near but displaced from the surge line, the control system comprising in combination:a selectively responsive anti-surge valve coupled to the compressor for controllably increasing compressor flow;a multiple module controller for receiving a control variable indicative of the operating point of the compressor and producing a control signal for controlling the anti-surge valve; the multiple module controller including;a PID control module responsive to the control variable for producing a first output signal exerting control action on the operating point of the compressor between the surge control line and the surge line;a closed loop rate control module responsive to a signal indicative of the rate of approach of the operating point to the surge control line for producing a second output signal having a magnitude which exerts control action on the operating point of the compressor to limit the rate of approach; and,an output signal selector for selectively coupling the first or second output signal as the control signal to the anti-surge valve.

이 특허를 인용한 특허 (65)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Surge prevention control system for dynamic compressors 원문보기

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Surge prevention control system for dynamic compressors 원문보기

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이 특허를 인용한 특허 (65)

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