Power system stability enhancement by static var system using self‐commutated inverters

Matsuno, K.; Nagasawa, Takashi; Ohtsuki, Hiroshi; Ohnishi, Shuichi; Ishiguro, F.; Takeda, Masatoshi

doi:10.1002/eej.4391120604

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…(3) shows that the output reactive power of Statcom has a direct relationship with the control angle ␦ i . Normally, the rating of Statcom is much smaller than that of the short-circuit capacity of the power system, and its maximum output reactive power is limited by its maximum rating capacity, or the maximum permissible output current, hence a Statcom can be modelled as a constant current source [8]. Its output reactive power, or output current, is proportional to the control angle ␦ i .…”

Section: Mathematical Modelmentioning

confidence: 99%

Development of a Fuzzy Rule-Based Multi-Objective Hybrid Controller for Static Synchronous Compensator

Chen

Song

Stonham

et al. 2000

Neural Computing & Applications

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Static synchronous compensator (Statcom) is a powerful new device for power systems, which can be used for various purposes. The multi-objective demands are quite different in nature, e.g. continuous linear control for voltage maintaining, and discrete bang-bang control for oscillation damping. Unfortunately, they often conflict with each other. In this respect, a supplementary damping control together with an independent voltage control is normally used. However, inevitable small disturbance and uncertainties will cause problems in the coordination of the two functions. To overcome such difficulties, a fuzzy rule-based hybrid controller is proposed in this paper, which incorporates conventional linear voltage control along with the fuzzy rulebased supplementary power damping control to form a unified global controller for Statcom. Because only simple fuzzy rules and a few input signals are involved, it is very easy to implement in a practical power system. The simulation performed on a Single-Machine-Infinite-Bus (SMIB) power system and an actual large power system demonstrates the effectiveness of the proposed approach.

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Section: Mathematical Modelmentioning

confidence: 99%

Development of a Fuzzy Rule-Based Multi-Objective Hybrid Controller for Static Synchronous Compensator

Chen

Song

Stonham

et al. 2000

Neural Computing & Applications

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“…(2) When one of the BTB units stops due to a fault, the others should compensate the loss of power transaction capability to maintain the power flow required for the BTB station. (3) Simulation methods to analyze a massively parallel BTB system should be established. This paper presents results related to these subjects.…”

Section: Overview Of Massively Parallel Btb Systemmentioning

confidence: 99%

Suggestion and feasibility study for a massively parallel back‐to‐back system

Satô

Matsushita

Temma

et al. 2002

Electrical Engineering Japan

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SUMMARYThis paper presents a new concept for back-to-back (BTB) dc systems. The main feature of the proposed BTB is referred to as massively parallel. This massively parallel BTB system consists of a number of small-or mediumcapacity inverter units that are connected in parallel. The concept of transmission power control using the massively parallel BTB is investigated using MATLAB for a case where a fault occurs. In addition, a method for modeling the proposed BTB in EMTP is investigated. The work presented in this paper shows that the proposed BTB system is very promising for large power system applications because the losses of the system are very small compared to conventional BTB using VSC (voltage source converter). The massively parallel BTB can keep operating even if an inverter unit fails, thus improving overall power transmission capability. © 2001 Scripta Technica, Electr Eng Jpn, 138(3) : 3442, 2002

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“…Moreover, if the flywheel effect of the rotor is positively utilized as an energy storage system, the exchange of the active power with the power system becomes possible [510]. Table 1 shows the constants of the synchronous generator used in analysis and simulation [2]. The ac-excited motor-generator in Table 2 uses the constants of the adjustable-speed motor-generator in operation at the Ohkochi pumping-up power station.…”

Section: Introductionmentioning

confidence: 99%

“…The basic concept of power system stabilization involves the improvement of the damping force and synchronizing power of generators; for this purpose, it is necessary to realize stabilization of the power swing (damping of power swing) and voltage stabilization (constant voltage control) simultaneously. However, in the self-excited SVC based on reactive power control [2,3], it is difficult to achieve simultaneous stabilization of the power swing and voltage stabilization, and the trend of positively introducing the active power control into the power system stabilization is increasing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of an adjustable speed rotary condenser for power system stabilization

Akagi¹,

Takahashi²,

Kobayashi³

et al. 2000

Elect. Eng. Jpn.

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Over the last five to ten years, significant progress has been made in high‐power semiconductor devices and in their practical applications to power systems. This comes not only from sophisticated semiconductor technology but also from the demand for a higher degree of frequency and voltage stability, and for greater reliability in power systems. This paper deals with an adjustable speed rotary condenser capable of not only reactive power control but also active power control based on a flywheel effect of the rotor. The behavior of a power system consisting of the adjustable speed rotary condenser, a synchronous generator, and a transmission line is subjected to a set of nonlinear differential equations. The set of nonlinear equations can be linearized by limiting attention to small perturbations around a reference state, thus leading to the so‐called Heffron–Phillips model of the power system. The Heffron–Phillips model derived is effective in analyzing effects of the adjustable speed rotary condenser on power system stabilization. The validity of the analysis is confirmed by computer simulation based on EMTDC. Finally, it is discussed how well power system stabilization is achieved by the rotary condenser. As a result, the rotary condenser has the function of decoupling reactive power control from active power control, thus producing a good effect on power system stabilization which would not be achieved by a conventional inverter‐based static var compensator. © 2000 Scripta Technica, Electr Eng Jpn, 133(1): 31–42, 2000

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Power system stability enhancement by static var system using self‐commutated inverters

Cited by 8 publications

References 1 publication

Development of a Fuzzy Rule-Based Multi-Objective Hybrid Controller for Static Synchronous Compensator

Development of a Fuzzy Rule-Based Multi-Objective Hybrid Controller for Static Synchronous Compensator

Suggestion and feasibility study for a massively parallel back‐to‐back system

Analysis of an adjustable speed rotary condenser for power system stabilization

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