The Research On The Planning Of Distributed PV Systems In Connection With Urban Distribution Network

Comprehensive promotion of energy conservation and environmental protection ofdistributed generation can effectively reduce the consumption of fossil fuels, helps tosolve the current prominent environmental problem and social problem. However, thepower output of distributed generation has many characteristics, such as volatility,stochastic, intermittent. As an organic part of grid, the urban distribution network isdirectly related to the development of the active power distribution network and smartgrid security and reliability, which has significant comprehensive economic benefits.Reasonable for city network planning is to realize the economy and security is aprerequisite for future urban power grid, can obtain great economic and social benefits,so this article delve into distribution network planning and the development prospects ofdistributed generation technology, the system analysis of the current research status athome and abroad. Detailed, systematically studies the principle of photovoltaic powergeneration systems, photovoltaic power generation system is established and the physicalmodel and mathematical model of pv inverter. With the in-depth research of urbandistribution network in, and in the technical level, in-depth analysis the influence ofphotovoltaic power generation system connected to the distribution network. Accordingto site selection of photovoltaic power generation system, constant volume problem,adopt active and reactive power network loss rate to determine the access to the locationof photovoltaic power generation systems, integrated micro rate is put forward, bycalculating the comprehensive micro rate to ensure the urban distribution network systemnetwork loss is minimal. At the same time puts forward a multi-objective programmingmethod of distribution network access photovoltaic power generation system, and givefull consideration to uncontrolled photovoltaic power, the uncertainty of load, withplanning period of the economic costs of distribution network operators, network loss,environment, and four sorts of voltage quality index as evaluation index ofmulti-objective function, and USES the chaos genetic algorithm for solving, and carrieson the simulation by IEEE-30system, the simulation results show that using thismethod can realize the optimization of distribution network system configuration, so asto ensure the stability of urban distribution network system, reliable and safe operation.