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Through and comprehensive tests are necessary to ensure complete stability and reliability of AUV, due to the high risk and consumption of in field testing, onshore testing technology for AUV is proposed. Rudder load simulator plays an important role in the onshore testing of AUV. In this paper, the design and development of a rudder load simulator was discussed. Rudder load calculation method during...
Across the globe nearly 1.6 billion people lack access to electricity, of which many live in rural or remote areas of the developing countries. The extension of central grid for rural electrification is not economically viable due to the geographical placement and low initial power demand. However, for rural villages, systems that are less reliable than grid standards may be acceptable, and allow...
This paper presents the joint Arrhenius-Weibull model as a new transmission line failure model as a result of operating under higher loading temperature due to DTR system application. The proposed model takes into account the effects of the line natural ageing (end-of-life) and its operation at higher loading temperature. The proposed model is compared with the conventional line ageing model that...
The paper presents a novel Telepower (−48V DC) reliability method, directly utilising site asset data in simulation software, to determine the effectiveness of battery replacement programs. Reliability is often estimated by a simple count of the number of outages per annum. This approach has many shortcomings because a count of outages can change dramatically even when the reliability of the physical...
The good operation of Java Bali System aims to achieve a reliable, efficient and economical Operating System. Reliability is generally examined in two criteria: availability of supply (adequacy) and securities (quality of voltage, frequency, and dynamic stability). Currently, there are many reliability parameter applied in Java Bali System such as bulk system, generation, and transmission. All these...
In this paper a new method is presented to achieve economic exploitation and proper usage of network capacity by exerting controlling actions over flexible loads and energy storage (ES) equipment. Multi-objective planning for demand response programs (DRP) and battery management policies is carried out by considering energy not supplied (ENS). In order to achieve an optimal scheduling, charge/discharge...
Due to its lots of advantages, CT20 type spring operating mechanism is widely used in the 126kV high voltage circuit breaker. This type mechanism should not meet the requirement of higher interrupting capacity circuit breaker while the interrupting capacity is increasing. In this situation, sometimes the vibration of the closing latch during closing may cause the closing process failed if there is...
Reasonable maintenance strategy can decrease power grid operation costs and enhance competitiveness of power grid. Therefore, according to the principle of system condition-based maintenance, an equipment imperfect maintenance model is built based on a modified Kijima II model, which considers electrical equipments' maintenance outage model and repair outage model and the effects of equipment maintenance...
This paper proposes a demand-side pricing strategy to purchase regulation service. The demand-side regulation service has the advantage of lower cost and faster response to reduce the utility company's cost comparing with the traditional automatic generation control (AGC). Thus, it is necessary for the utility company to make a tradeoff between the demand-side regulation and the AGC to minimize the...
This paper introduces a new method for determining the optimal penetration of wind farms in power system adequacy assessment. Determining optimal penetration levels of wind farms based on the improvement in system reliability is an important factor in planning studies. However, this task requires repetitive calculations of the reliability indices and the capacity value of wind power. In this work,...
The increasing share of renewable fleet is creating havoc in wholesale electricity markets, putting generation adequacy1 at a stress level likely to jeopardize the security of supply over a wide — even pan-EU — area. And this will only get worse as, in line with the Paris agreement's decarbonisation path until 2030, 2040 or 2050, we want to move away from the traditional centralized fossil fuel system...
Mechanical impact or shock resulted from inevitably transport or usage of electronic equipment, may cause great stress and strain in the electronic package, even lead to the failure of electronic equipment, so it's of great significance to explore the mechanical behavior of electronic packaging under drop/impact. In all kinds of package, 3D System in Package with Through Silicon Via has become a hot...
0.35mm fine pitch wafer level chip scale package (WLCSP) has been developed by NCAP for portable electronic applications. It can provide 196 pin counts in 5mm × 5mm package body size. This paper reports the development work of WLCSP and the package level and board level reliability study including thermal cycling and drop test. The technology is evaluated using a 5mm × 5mm test vehicle with 0.35mm...
In this paper a new model is proposed to schedule the capacity of both up and down spinning reserve (SR) considering transmission constraints. Up SR is seen as the most important resource to cope with many contingencies and it is well studied, while the down SR is ignored by many papers especially when network constraints are considered. Ignoring the down SR would cause sub-optimal or even unfeasible...
This study explains factors in terms of intention to use e-health services: consumer informatics e-health type. For this purpose, the original version of Technology Acceptance Model (TAM), which included perceived usefulness, perceived ease of use, and intention to use, is extended with Health Belief Model approach (perceived health risk, health consciousness). A survey method and analyzed data using...
Utilities use the bus/branch model for planning and operations studies. In the bus/branch model, bus numbers are used as unique identifiers. However, bus numbers can change due to addition of equipment, specific substation configurations (splitting buses) or due to equipment outages. This often creates problems because many auxiliary files used in power system studies need to be modified. If the node/breaker...
As technology scaling reaches nanometre scales, the error rate due to variations in temperature and voltage, single event effects and component degradation increases, making components less reliable. In order to ensure a system continues to function correctly while facing known reliability issues, it is imperative that the system should have the means to detect the occurrence of errors due to the...
For a degradation system operates in a complex environment, it may suffer multiple external shocks. It subject to dependent soft and hard failure processes due to exposure to degradation and shock loads. In this paper, two degradation system reliability models with multiple external shocks are developed. The soft failure process is governed by a general path and the hard failure process is governed...
Combining with the characteristics of smart distribution grid, this paper expounded the architecture, control strategy and key technology of self-healing control in smart distribution grid and proposed the “three-layer with seven-unit” architecture and the option method of control strategy. Combining with the characteristics of smart distribution grid containing distributed power, this paper introduced...
Conventional capacitors contribute to a considerable scale of system level size, cost and failure, and suffer from one or more issues on energy density, cost, and reliability. A two-terminal active capacitor, which has the same level of convenience as passive capacitors, is proposed recently to overcome the above issues. In this paper, the modeling of the active capacitor is investigated and a voltage...
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