Research On Safety Risk Management Of Power Distribution Network Upgrading Project Under 10kV Voltage Grade

With the flourishing development of the electric power industry,the number of safety accidents in the process of electric power construction has increased day by day,which has caused huge losses to the lives and property of the people and caused certain negative impacts on the healthy development of the economy and the harmony and stability of society.For this reason,this paper takes the upgrade project of voltage distribution network below 10 kV as the research object,and discusses in depth how to carry out safety risk management in the project implementation process.Based on the in-depth review of domestic and international references for security risk management,this paper reviews the current status of security risk management research at home and abroad,discusses related concepts of security risk management,and clarifies the content of security risk management system and the process of security risk assessment;The brief introduction of the security risk of the distribution network upgrading project,introduced the project background,described the project objectives,summed up the project's existing safety risks,and proposed improvement measures;discussed the safety risk management of the distribution network upgrading project and proposed the project.Safety risk management and control measures and closed-loop management have run a discriminant mission-critical method for safety risk assessment.First,the task decomposition method is used to decompose the risk of the project into a number of WBSs to form a survey form.The project is divided into several individual tasks through forms.Each individual job is divided into different types of work.Each type of work is decomposed into job tasks and steps.Based on the survey results of the project participants,the key tasks were determined using the critical mission method.Then,each step of the keytask is graded according to "Risk = Exposure(E)× Consequence(S)× Possibility(P)" in each step to calculate the risk value.In this thesis,three examples are analyzed hierarchically using MATLAB software.In Example 1 “Risk Assessment of an Overhead Line Retrofitting of a Power Distribution Network Upgrade Project”,the mission with the highest risk value is a pole-running operation.The average overall work risk is 0.083.The highest risk value is the C5 charged equipment.Its risk value is 0.426;in the calculation example 2 “Operational Decomposition Risk Assessment for Distribution Network Upgrade Projects(Part)”,the risk value of the job task in the cable head production link is the highest,and the average work risk is 0.071,including the operation steps.The risk value of Y10~Y17 is high,and the range of risk value is0.0711~0.0846.In Example 3,the task risk value for installation of an oil-immersed transformer in a room is evaluated in “Risk Assessment of a Transformer Installation Project for Distribution Network Upgrade Project”.At the highest level,the overall work risk assessment averaged 0.160,with the highest value of risk being the transformer neutral,with a risk value of 0.312.According to MATLAB software's risk calculation results,corresponding risk countermeasures are taken.From the perspective of organization management and technology,scientific,reasonable and effective risk control measures are formulated to ensure project safety.Using MATLAB software to calculate the risk greatly improves the efficiency of risk calculation and saves the cost,thereby increasing the benefits of the company.At the same time,it also makes it possible to digitize the risk.