Three-level control strategy for minimizing voltage deviation and flicker in PV-rich distribution systems

Both compliance and discontinuity are the common characteristics of the real ground surface. This paper proposes a stabilization method for the underactuated bipedal locomotion on the discontinuous compliant ground. Unlike a totally new control method, the method is actually a high-level control strategy developed based on an existing low-level controller meant for the continuous compliant ground. As a result, although the ground environment is more complex, the calculation cost for the robot walking control system is not increased. With the high-level control strategy, the robot is able to adjust its step-length and velocity simultaneously to stride over the discontinuous areas on the compliant ground surface. The effectiveness of the developed method is validated with a numerical simulation and a physical experiment.

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Intelligent Operation Control for the Fused Magnesia Production

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.391-392.1450 ◽

2011 ◽

Vol 391-392 ◽

pp. 1450-1454

Author(s):

Yong Jian Wu ◽

Ping Zhou ◽

Pin Shang ◽

Tian You Chai

Keyword(s):

Control System ◽

Intelligent Control ◽

Control Strategy ◽

Control Method ◽

Level Control ◽

Loop Control ◽

Intelligent Control System ◽

Technical Requirements ◽

Operation Control ◽

Lower Loop

An electro-fused magnesia furnace (EFMF) is used to produce electro-fused magnesia. Due to the complex dynamic characteristics of the EFMF production process, it is difficult to achieve the satisfactory control performances only by the independent conventional control method. As a result, the lower loop control with manual operations is still widely used in practice. However, the manual operation cannot ensure that the actual production qualities and the energy consumption of unit production meet the technical requirements all the time. In this paper, an intelligent operation control strategy is developed for the EFMF to automatically adjust the setpoints of the lower level control system. Based on the proposed intelligent control strategy, an intelligent control system for the EFMF is built and implemented on site. Industrial application has demonstrated that the intelligent control system can achieve reliable, accurate and timely control performances.

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A two-level control strategy with fuzzy logic for large-scale photovoltaic farms to support grid frequency regulation

Control Engineering Practice ◽

10.1016/j.conengprac.2016.11.006 ◽

2017 ◽

Vol 59 ◽

pp. 77-99 ◽

Cited By ~ 11

Author(s):

Nguyen Gia Minh Thao ◽

Kenko Uchida

Keyword(s):

Fuzzy Logic ◽

Control Strategy ◽

Large Scale ◽

Frequency Regulation ◽

Level Control ◽

Support Grid

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Control of Activated Sludge Plants Based on Measurement of Respiration Rates

Water Science & Technology ◽

10.2166/wst.1993.0677 ◽

1993 ◽

Vol 28 (11-12) ◽

pp. 369-376 ◽

Cited By ~ 1

Author(s):

Abraham Klapwijk ◽

Henri Spanjers ◽

Hardy Temmink

Keyword(s):

Activated Sludge ◽

Respiration Rate ◽

Flow Rate ◽

Control Strategy ◽

Rate Control ◽

Level Control ◽

Fixed Position ◽

Integral Control ◽

The Third ◽

Respiration Rates

An integral control strategy for activated sludge plants presented in this paper consists of three low-level control tasks. The first is the actual respiration rate control by manipulating the influent flow rate, whereby the aerators are at a fixed position for each setpoint. The second task is the maximum respiration rate control by manipulating the waste activated sludge flow rate. The third task of the integral control strategy is the instantaneous respiration rate monitoring, which informs the operator about the performance of the process.

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