HVAC Transmission Line Capacity Enhancing Scheme Based On Optimization Model In Shenzhen Power Grid

Social consumption is increasing, especially in big cities, hence the lack of electricity supply is more and more significant due to power plant nest electricity load is limited, which is named "Ka Bo Zi" issue. Therefore, how to improve the transmission capacity of transmission lines is of great concern to China’s power enterprises. Improving the conductor allowable temperature is one of the main ways to improve the Transmission Line Capacity. An appropriate increase allowed in the current specification wire temperature is able to increase the system stable carrying capacity, thereby increasing the line to the normal transmission capacity.However, the grid "Jian-Heng" lines often run on a too-high temperature, worn-out equipment and transmission capacity is very low, which is extremely limited that only by increasing the operating temperature of conductor to increase the tolerance effect. In the big city, corridor resources constrained by shortage of high-voltage lines path, it is difficult to add new transmission line; for the other thing, if full tower renovation, replacement of large section and is adjusted on the path planning is more difficult. Therefore, for mitigating grid "Jian-Heng" capacity-increasing transformation of research is essential and urgent. This in-depth analysis of retrofit for capacity increases the restrictive conditions of and technical requirements, which is based on lines conveying capacity, materials, structure and thermal stability as well as the relationship between the construction process and mathematical models of transmission line, transmission line capacity-increasing ways to compare on the technical and economic aspects. In the case of the lack of land and increased tower height, in-depth analysis of the current state of the art wire capacity-increasing technologies. Including wire line capacity-increasing technologies, based on gap and aluminum-base ceramic fiber core capacity increase of line capacity.Under various wire increased capacity technology of technology economic parameter and the run test, test data, under transmission line transportation power increased volume, and transformation costs and line actual run temperature, and arc vertical, State volume Zhijian of mathematics relationship, to reasonable cost premise Xia maximum improve line transportation capacity for optimal target, established transmission line increased capacity of most optimization model, and application optimization algorithm for analysis calculation, to developed different situation of transmission line by should use of increased capacity programmer. Crowned with a wire-based transmission capacity analysis and calculation of high-voltage AC transmission line capacity expansion programmers.At last, to get the most optimal solution thought the intelligent algorithm BPSO for Shenzhen transmission line increased capacity transformation engineering for cases, under Shenzhen grid of reality, combination currently Shenzhen grid structure and load level, and Cosco period of planning design and load forecast level, on by used of three species increased capacity way for in-depth research analysis, established transmission line increased capacity of economic and technology most optimization model, and by most optimization solution, to out various different situation line of optimal increased capacity programme, solution Shenzhen grid of "Jian-Heng" problem.