The Design And Application On Voltage And Reactive Power Optimized Control In Shunyi District

With the rapid development of power industry and the continuing escalation of industrial structure, making the optimal voltage and reactive power control problems of increasing importance. Currently, Beijing most of the regional power balance between the use of local, decentralized way to adjust voltage and reactive power control, extensive use of automatic voltage and reactive power integrated control device (VQC). The substation where the collection device operating parameters, only the realization of the operation for a single substation control the whole network can not achieve optimal control of reactive power and voltage. In the secondary load tap grid, there will be frequent adjustment of voltage, voltage regulator likely to cause unnecessary anomaly or equipment movement; and because each substation must be installed VQC devices, investment, equipment maintenance volume.In this paper, the problem of optimal control of voltage and reactive power Shunyi district conducted a study on the reactive power optimization algorithms and ultra-short-term load forecasting a summary of the theory, induction, and proposed a genetic algorithm to optimize the combination of expert system algorithm expert system for supporting individual variations, help to improve the optimization direction, enhance local search ability of genetic algorithm, the algorithm can be found with greater probability of global optimal solution, to prevent premature convergence. Another study based on linear extrapolation of ultra-short-term load forecasting based on the design of this ultra short-term load forecasting based on the optimization of system voltage and reactive power Shunyi district. The system is collected by the SCADA network-wide operating voltage of each node, reactive power, active power and other real-time data, by ultra-short-term load forecasting, expert systems, decision support for the whole network for reactive power optimization, guide and determine the scope of the whole network within the substation capacitors and OLTC tap stalls coordination, and through dispatch control center automatically. At present, the regional power grid system has been used in Shunyi, to improve the level of the node voltage and the purpose of reducing the net loss, made significant safety and economic benefits.