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This paper proposes a two-stage distributed method for the restoration problem using multi-agent system. The first stage gets a quick solution and implements it to restore as much loads as possible based on their priorities. The second stage will be applied to faults which expected to take longer time in order to maximize the restored loads (if there are loads still not energized from the first stage),...
We show in this paper that the observed tendency to improve the operation reliability of the tap changer, justifies “on-line” monitoring of that component. We present the hardware and software solutions based on OLTC drive power comparison, which are especially useable for relatively aged transformers. We present the constructed device and its abilities. We explain that the integration of the applied...
This paper presents simulation results by using Matlab/Simulink for the assessment of harmonic and interharmonic currents generated by the voltage source inverter (VSI)-fed adjustable speed drives (ASDs). In the simulation, the commutation effects caused by source impedance and non-ideal supply voltages are included. The front-end converter, dc link, pulse-width modulated (PWM) inverter, and the induction...
This paper describes a design of a multi-channel telemetry unit for monitoring distribution switching station based on TMS320F28016 DSP. It details the composition of the hardware block diagram and the design of software. It is capable of measuring multi-channel three-phase voltage and current. In the software, it adopts Fast Fourier Transform to compute multi-channel three-phase voltage, current,...
EHV centralized control center is the development trend of the power system in the future. In this paper, we mainly introduce the design of the computer monitoring system, the remote video monitoring systems, and the channel configuration and the system communication scheme of Hunan 500 KV power grid running centralized control center. The successful design and operation of this centralized control...
The substation recording system is independent, the control center can not effectively monitoring on its operational status and cannot achieve more centralized management, cannot immediately find malfunction. So Put forward through the IP networking with straight unicom establish dispatching center of centralized management platform, make recordings in different geographic location of substation scheduling...
Power distributing and consuming communication network is the key information infrastructure for the realization of the distribution grid automation, electric consumption information collection, bidirectional marketing interaction and smart grid, the important technical guarantee for the realization of the smart grid and the vital component for the communication networks in all regions. Integrating...
This paper investigates the impacts of circuit breaker performance on voltage instability corrective actions for power systems with distributed generations (DGs) under contingencies, and proposes a new computer network-aided strategy for stability improvement. This strategy aims to save a distribution system from imminent voltage collapse due to contingencies occurring in subtransmission system, distribution...
Online monitoring and fault diagnose system of electrical device is one of the main research directions in the electric field. It is also one of the key technologies for settling the decision problems of reliability, safety and maintenance. STATCOM is a kind of large Flexible AC Transmission System device which is used more and more widely. As its cost and complicated degree are high, it is especially...
Saving power is the major goal in every area either in industry or in campus. However, there are more uncertainties in campus. For instances, the usages of air conditioners in the classroom are irregular events. In the other hand, the lighting in the parking area is the regular event. For the regular event, we use the unstable green energy like wind or solar to save the electric cost. For the irregular...
Rapid economic growth mounts immense pressure on the electric power generation, transmission and distribution infrastructure. Matching the rapid growth in a large metropolis poses several techno-economic challenges on utilities in order to operate the power supply distribution network efficiently and reliably. Utilities need to look at innovative ways to utilize the latest developments in information...
Distributed generations (DGs) powered by renewable energy resources have become increasingly popular and starts to show benefits, but their connection to distribution systems brings operation challenges that must be carefully monitored and controlled. This paper proposes a new network-enabled, real-time monitoring strategy for tracking the operating states of the distribution system, with a focus...
This paper proposes a new strategy for computer network-assisted corrective actions against short-term and long-term voltage instabilities in the electricity power distribution system connected with renewable-energy distributed generations. The proposed strategy aims to save the distribution system from imminent voltage collapse due to contingencies occurring in the subtransmission network, distribution...
The paper illustrates the electrical stations of medium voltage in which there is going to be implemented an automated multivariable system, based of software packages for data acquisition, storing, data transmission, processing, monitoring, analysis and which to allow the monitoring of a large number of parameters. The purpose of the local data acquisition, protection and control equipment and of...
This paper proposes a new computer network-facilitated voltage stability control strategy for electricity power distribution systems connected with distributed generations. The proposed strategy aims to determine stability enhancement operations on two aspects: one is to increase power system operation security during normal conditions, and the other is to save a distribution system from imminent...
Renewable-energy powered distributed generations (DGs) of electricity are becoming popular and start to show benefits, but their connection to the utility distribution systems brings operation challenges and supply uncertainty that must be carefully monitored and forecasted to provide data for correct controls of the systems. This paper proposes a new strategy for distributed monitoring and centralized...
The capacity and feature of a large-sized low-voltage switchgear laboratory are presented in this paper. A monitoring and control system is designed for the laboratory with industrial PC as upper computer and PLC as lower computer. The testing process and programming philosophy of switchgear testing are discussed in detail. WinCC configuration software with a human-machine interface (HMI) is used...
Overcurrents on distribution systems include permanent faults, temporary faults and other lower magnitude surges, typically from switching events. The overcurrent environment of the distribution system requires quantification if improvements are to be made in power quality, protection and reliability. New and more complex overcurrent protection products require more exact knowledge of feeder conditions...
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