Seamless connection between distribution automatio

Equipped with seamless connection between automation and GIS

1 Preface

after nearly a decade of rapid development, China's power industry has achieved an annual power generation of 1157billion kwh, completely changing the past phenomenon of power supply exceeding demand and low power operation frequency and voltage. Major power plants across the country have adopted DCS system as the unit control system of the whole set of units, improving the operation efficiency of equipment and ensuring the safe and reliable operation of unit equipment

however, due to the long-term existence of the idea of "heavy generation, light use, and useless" in the development process of China's power industry, the current urban and rural electricity and water should be adjusted loosely and low, the urban and rural electrical equipment is old, the frame structure is weak, the power supply reliability is low, the power supply capacity is insufficient, and the voltage quality is unstable. With the economic development and power plant construction in China, the contradiction of power supply is becoming more and more prominent. If we do not solve the contradiction of power supply, it will seriously restrict the further development of our economy

therefore, in 1998, the state power company put forward the idea of accelerating the construction and transformation of urban power, with the goal of improving the overall power supply capacity of urban power, improving the safe operation level of power, improving the reliability of power supply, improving the quality of power, reducing losses, and improving the automation level of urban power

therefore, the construction and transformation of urban power in China will be one of the main tasks of China's power industry in the next few years. In the 1990s, some urban power distribution in China took residential areas, development zones or part of power distribution as pilot projects to carry out power distribution automation, and gained some operating experience. However, due to the development of urban power distribution, the structure is complex, the equipment is complex, and some equipment is quite old, involving many aspects, so it is difficult to make a unified plan

2. Current situation of urban power dispatching automation

dispatching automation is a control means implemented from the perspective of the whole system to ensure the safe, economic and high-quality operation of the power system. Dispatching automation has experienced three stages: dispatching, telecontrol SCADA and computer dispatching. At the initial stage, the dispatcher obtains the information of on-site equipment through contact, understands the power operation status, and makes decisions. The collection speed of dispatching information is slow, and the correctness and comprehensiveness of data cannot be guaranteed; The adoption of telecontrol SCADA technology helps dispatchers quickly, accurately and comprehensively understand the system operation status through telemetry, remote signaling, remote adjustment and remote control of the computer system, so as to make correct decisions; In recent years, with the development of computer technology, computer software is used to make decisions directly based on real-time data, so as to shorten the decision-making and operation time of dispatchers, shorten the time of failure and outage, and improve the reliability of system operation. Xinhua Control Engineering Co., Ltd. combined with years of experience in the production and development of DCS system, launched xdams-400 with automatic system, which belongs to the third generation of dispatching automation system. In the current urban dispatching system, due to historical reasons, three generations of dispatching systems coexist. At the same time, there are some MIS and GIS systems. Many kinds of systems coexist, and the maintenance workload of the system is heavy, so the continuity of data cannot be guaranteed between various systems. How to interconnect with these systems during the construction of distribution automation master station, realize the sharing of data and resources, and reduce the workload of system maintenance staff is an important aspect of the construction of distribution automation master station

3. Distribution automation of Huangpu Community

3.1 project overview

Huangpu Community is located in the central area of Shanghai. It is the political, commercial and cultural center of the whole Shanghai, and it has high requirements for the reliability of power supply. The realization of distribution automation in Huangpu District has a significant impact on improving the reliability of power supply in the whole region and meeting the requirements of users for power supply. This time, Shanghai Urban Power Supply Bureau chose Huangpu District as the pilot of distribution automation, so its significance is particularly far-reaching

this time, Xinhua Control Engineering Co., Ltd. and Zhida power jointly developed the distribution automation project in Huangpu Community, of which Xinhua company is responsible for the construction of the distribution and dispatching master station system

the dispatching master station of Huangpu Community is in the district dispatching of Hudong power supply station, which is connected with the secondary master station in Henan station through optical fiber Ethernet. The master station system connects the server and workstation through dual Ethernet. All static data and historical data are stored in the data database of the data server. All workstations can read or write data from the database through dual Ethernet for data display, report making and printing, and historical data storage, Graphic display, report and printing functions. At the same time, a GIS interface workstation is also set in the main station system to connect with the GIS system, receive equipment data from the GIS system, convert the object topology connection relationship in the GIS graphics, and transfer it to the data of the distribution automation system

3.2da/dms necessity of interconnection with GIS

GIS (Geography Information System) is a technology that integrates computer graphics and data, stores and processes spatial information. It organically combines geographical location and related attributes, accurately and truly outputs pictures and texts to users according to actual needs, and meets the requirements of equipment management and maintenance of power supply enterprises, With its unique spatial analysis function and visual expression, it can make various auxiliary decisions. In this Huangpu Community Project, users have already built GIS system. The key to successfully complete the whole project is to realize the data resource sharing between da/dms system and GIS system

because the whole power distribution is a dynamic system, 3. Understand that after-sales, according to user experience, its network equipment and structure will change every day under normal circumstances, so the account data of GIS will be updated every day, and the updated data must be sent to da/dms system; At the same time, the system network topology recorded in GIS must also be sent to da/d double corrugated cardboard MS system for network topology analysis and calculation. Therefore, realize the interconnection between da/dms and GIS system, so that da/dms system can automatically generate graphics directly according to the network topology structure of GIS system, and carry out topology analysis and calculation; Display the relevant attributes of the equipment and complete the equipment management function; The extended function of GIS - complaint (TCM) function is used as the data supplement of da/dms

3.3 system interface

a network interface station is set in the main station system. The GIS system can read real-time data from the real-time database of da/dms for GIS display through the API interface provided by the interface scroll spring fatigue testing machine maintenance small knowledge workstation. At the same time, GIS can also access the historical data of da/dms through the interface workstation in ODBC mode