Analysis on the voltage stability on transmission network with PV interconnection

Voltage stability means the ability of the power system network to maintain steady-state voltage value at all buses in the system under normal condition and after being subjected to a disturbance. This research highlights the effect of solar photovoltaic (PV) as the subject of disturbance to the network system as this kind of energy source has emerged towards higher level of integration into the national grid. High penetration of solar PV into the grid may cause several issues of stability and security to the system particularly effecting the normal voltage and line overloading. This research is focused on the simulation of power flow to study the transmission network behavior with and without the solar PV interconnection. To accomplish the research objectives, the network system will be modelled in a software known as Power System Simulator for Engineering (PSSE). The simulation result will be discussed and analyzed using Voltage Stability Indices (VSI) to prove and strengthen the theory behind the literature review

Spider Grass Cutter

The regular lawn mower requires manual handling to run and it also uses fuel as the power source in the cutter component. There are a few disadvantages of the regular grass cutter. First, the operation cost of a regular grass cutter increases as the fuel price increases. Second, it is heavy and thus requires a lot of energy to push around. Third, it produces a lot of noise that will disturb the neighbours and surrounding areas. Considering the facts, a project to redesign the handling of a regular grass cutter is proposed by focus on developing the light, easy to carry and easy to store machine system. This proposed system will help the housewives especially to use the mower itself and with little assistance