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This paper assesses economic significance of Basslink in terms of market benefits, namely operating, capital and unserved energy cost savings. It presents long term market benefit modelling framework consistent with the Australian Regulatory Investment Test for Transmission to assess the market benefits attributable to Basslink. Economic analysis concludes that Basslink continues to be economic value...
Solar photovoltaic electricity is more expensive by a large margin compared with conventional electricity at retail level. As a result, general public do not find the solar PV electricity an attractive option to use for generating a portion of their electricity need. To promote PV electricity utilization and to make it more attractive, Governments of some countries like Germany, Japan, USA, Australia,...
Precise estimation of synchronized phasors in phasor measurement unit (PMU) is significant for system analysis, control and security. Measurement technique under dynamic conditions is addressed in recent researches. Limitations and criteria for dynamic behaviors are proposed in the new issued IEEE Std. C 37.118-2011 for synchrophasor measurements for power system. In this paper, dynamic characteristics...
In Inductively Coupled Power Transfer (TCPT) system, when system running in force resonant mode, there will exist dangerous short current between the resonant network and the switching network when switching frequency drifts away from inherent frequency of the resonant network. This paper proposes a short current control method to eliminate the short current by regulating the switching frequency to...
A microbial fuel cell inoculated with activated sludge of a wastewater treatment plant was constructed. Oxygen was provided by algal photosynthesis in the cathodic chamber and the electricity generation characteristics of the fuel cell were then investigated. Results showed that binary quadratic equations can express the relationships between COD degradation rate and COD loading and between COD removal...
Wind farm integration assessment has become widespread with large scale projects happening worldwide. For quicker analysis it is efficient to carry out analysis using equivalent models of wind generator models since a typical wind farms contains tens to hundreds of units. This paper details the detailed procedure of arriving at equivalent models. This is demonstrated using commercially available software...
The Upington distribution network is remotely located from the main transmission system. It is characterized by long lines supplying relatively small amounts of loads. The fault levels at various points in this network can be characterized as very low. These two aspects can lead to this network being characterized as very weak. As a result, faults taking place at various locations in the system tend...
Photovoltaic (PV) technology is well known technique in capturing irradiation of light from sun to produce electricity. Consequences in obtaining the quality of light make it the source an unpredictable. When PV is connected to network, it will creates lots of problem especially in distribution system. One of the major problems is reverse power flow caused by mismatch power between Renewable Energy...
The transient voltage security and economy of power grid could be coordinated by reasonably choosing the installation locations and capacity of the static var compensator (SVC). Quantitative assessment method has been proposed to identify the voltage security weak areas and the key faults causing voltage unsafe in power system. Based on quantitative analysis, the comprehensive voltage security improve...
With the rotor's AC excitation characteristics, the double fed motor can realize free control of the rotational speed and the torque, so it has advantages on mitigating subsynchronous resonance (SSR). This paper proposes the method of using double fed motor for mitigating SSR for the first time. When double fed motor and generator are installed coaxially, the double fed motor can bring in damping...
In this paper, an improved conductor temperature model is described. This model is based on dynamic thermal rating technology and reference conductor. Using this model, the solar radiation sensors, the anemometer and the environment temperature sensors were no longer needed. Since measurement error of conductor temperature is inevitable, the calculation error of maximum capacity will exist. In this...
Electricity providers are increasingly faced with the challenge to integrate variable renewable generation with the existing portfolio and the electricity grid. The UltraBattery® technology, an entire new class of advanced lead-acid batteries invented by the CSIRO, now allows the continuous management of variability and shifting of energy, crucial for the large scale integration of renewables. The...
HVDC transmission system may cause subsynchronous oscillation (SSO) in thermal generation units near rectifier station. Based on Xiluodu right station - Guangdong double line ±500kV DC transmission project and system conditions near rectifier station, the risk of subsynchronous oscillation (SSO) instability in nearby thermal generation units in Weixin Plant and Zhenxiong Plant is evaluated. In the...
This paper presents a new method to damp power swings in transmission systems. Power swings can cause damages, problems with active power delivery and so on. The number of transient stability problems will rise in the future due to restructuring of power systems by renewable energy sources. Especially systems with a high power transmission over a long distance are prone to stability problems. In such...
Investigations of the electromagnetic interference indicate that disconnecting switching of the off-loaded busbars is one of the most important sources of electromagnetic interference in the secondary circuits of a power station. Disconnector's contacts in air-insulated substations (AIS) move slowly causing numerous strikes and restrikes between contacts. Every strike causes high-frequency currents...
This paper elaborates a measurement system for monitoring and collecting life data of the performance of LED drivers during environmental accelerated life test. In this paper, we present the system design including hardware characteristics and software frame. In addition, we demonstrate the measurement system's performance by designing, conducting and analyzing an environmental accelerated life test...
The major issues always attached to conventional electrical Distribution Systems are poor voltage regulation so far the consumers are concerned and the high level of losses & limited or no reserve capacity of the Network so far as the utility is concerned. In this paper, an attempt has been made to address both issues by adding Dispersed Generation of appropriate capacity at appropriate location,...
This paper focuses on the study of the paralleled multi-terminal HVDC system (MTDC). A control strategy is investigated for LCC-MTDC system based on the autonomous decentralized theory. By this approach, a stable operating point can be reached from initial starting independent of communication coordination. Simulation is performed on a model of LCC-MTDC system with four terminals using PSCAD/EMTDC...
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