Application And Research Of Power Flow Simulation Module Of Dalian D5000 Regulating System

Dalian dispatch automation system before using CC-2000 and OPEN-3000 as the main system operation, is responsible for the data upload company indicators of the Dalian area 220 k V, 500 k V substation and the local power plant. The existing EMS system is very unstable, the application can not meet the dispatching needs, but can not meet the State Grid Corporation of the "regulation and control one" system requirements, and is unable to meet the requirements of the system security standards and the smart grid dispatching technical support system as reflected in the application of integrated platform construction. From 2013 onwards, the Dalian Dispatch Control Center began building D5000 system to solve the rapid development of Dalian power grid to bring dispatching and monitoring problems.This paper first introduces the development of smart grid at home and abroad, the latest requirements of the State Grid and the characteristics of Dalian power grid itself.With the increase of intelligent substation construction, the dispatching and monitoring have brought new challenges.Dalian Dispatch Control Center in order to solve their problems in the operation of the grid, has been starting in 2013 to build Dalian D5000 control system.I am mainly responsible for the building of 66 k V power grid of D5000 system power flow calculation module.In this paper, the mathematical model of power flow calculation module in D5000 system is introduced in detail.The model mainly adopts the Newton-Raphson iterative method.Newton-Raphson iterative method is commonly used to solve nonlinear equations, is also widely used in the calculation of power flow method.At present, 66 k V power grid architecture in Dalian is split operation.With the increase of Dalian 220 k V intelligent substation, in order to improve the stability of Dalian power grid, the ring operation mode of 66 k V side of the power grid is simulated.And in the case of the maximum load in winter, the stability is checked in the normal, 66 k V N-1 and 220 k V N-1 case of grid.For the future operation of Dalian power grid arrangements it provides a strong basis for reference.Based on the power flow calculation module of D5000 control system of Dalian Dispatch Control Center, this paper validates the feasibility of the 66 k V side through the contact line loop operation mode, and provides the reference for the future operation mode arrangement of Dalian power grid. Practice has proved that the system is running well, the flexibility and effectiveness of business processes improved significantly, greatly enhanced control of the power grid in Dalian to support efforts.