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Concentrated control system (CCS) has been used for almost all reported cascaded H-Bridge (CHB) multilevel static synchronous compensators (STATCOM's). However, the CCS can not achieve “true” modular implementation. This paper presents a novel distributed control system (DCS), which combines one central controller and several cell controllers. The central controller is responsible for the upper-layer...
Distributed-logic-control is an independent parallel inverter control technique. The strategy to restrain circulating currents based on distributed-logical-control is researched in the paper. The conventional method by power regulation to restrain the circulating current is affected by the parallel impedance and has such disadvantages in the response speed and harmonic component of circulating current...
This paper presented a design for distributed logic controlled parallel operation UPS systems depending on cycle control. This design proposed a practical parallel operation according to the needs of real industrial application. This protocol ensures correct logic switching and stable information exchanges in toughly interfering application environment. Also this protocol gives the plug and play ability...
The novel & practical digital parallel UPS system has been introduced in this paper. The parallel UPS system bases on distributed logic paralleling control strategy used by TMS320F240 as main-control chip. Data communication is realized among all of parallel UPS units or between parallel UPS units and supervision device with application of CAN bus technology. This paper illustrates briefly relevant...
A parallel operation system of UPS based on distributed logic control has been studied in this paper. The mathematic model of the system was constructed and the parallel operation principle was analyzed. Real-time active and reactive power detecting method was given. A control scheme for circumfluence restraining was proposed herein. The parallel operation control technique was put forward and has...
This work presents a new control technique, which implement N+1 redundant parallel operation for three-phase inverter modules. Experiments are presented to verify the theoretical discussion with four three-phase 40 kVA inverter modules. As a result, this scheme can achieve excellent characteristics both in steady states and in transient states.
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