CN205121624U - Economic operation and optimization analysis system for power distribution network - Google Patents

Abstract

The utility model discloses a distribution network economic operation and optimization analysis system mainly includes: the intelligent distribution transformer comprises an intelligent distribution transformer area, an intelligent distribution transformer terminal, a communication network, a master station system and the like, wherein the intelligent distribution transformer area and the intelligent distribution transformer terminal arranged in the intelligent distribution transformer area adopt an integrated design scheme, and distribution transformer monitoring, low-voltage switch control, protection, harmonic wave monitoring and the like are achieved. The communication network adopts a GPRS-based wireless communication mode, carries out information interaction with a master station by using a latest standard protocol of a power grid, and the master station system adopts a C/S and B/S mixed architecture mode, a preposed cluster acquisition and server cluster processing technology, an advanced distributed data processing and storage solution scheme and a load balancing mechanism by based on a redundant commercial database and a memory database. The utility model realizes the monitoring, control and data analysis of the transformer area; the transformer area energy saving and loss reduction is realized, the voltage qualification rate is improved, and the power supply reliability is improved, so that the management of the distribution transformer area is refined, intelligent and scientific.

Description

A distribution network economic operation and optimization analysis system

【Technical field】

The utility model relates to the technical field of distribution network automation production, in particular to a distribution network economic operation and optimization analysis system.

【Background technique】

In recent years, with the rapid economic development, the original urban-rural junction has gradually evolved into a new type of city and development zone. The workload of power management, operation and maintenance in these areas has increased year by year, which has brought new challenges to the power sector.

After more than ten years of development in the distribution network, the primary and secondary equipment and automation systems are basically stable and mature, but the distribution network automation mainly focuses on feeder automation and remote control, and has little consideration for the operation and management of the station area under the 10kV line. Although some smart devices (TTU) have been installed in many station areas, functions such as load curve, three-phase balance degree, load rate, and voltage qualification rate have not been realized from the perspective of station area operation management. Therefore, how to use new technologies to monitor the operating status of the station area in real time; conduct research on the load rate, reliability rate, balance rate, and load growth trend of the station area; Lower cost, effective means, quickly improve the management level of power supply enterprises to the station area, strengthen the power optimization control of the distribution station area, improve the quality of power supply, improve the reliability of power grid operation, reduce the workload of maintenance, and improve efficiency It is a major task of the new round of smart grid construction.

Therefore, in order to overcome the deficiencies of the above-mentioned technologies, a kind of economic operation of distribution network that can effectively guide the optimal operation of distribution network, improve the operation efficiency of distribution network, reduce power loss, improve distribution management level and economic benefits is designed. And optimize the analysis system, exactly the problem that the inventor will solve.

【Content of utility model】

Aiming at the deficiencies of the existing technology, the purpose of this utility model is to provide a distribution network economic operation and optimization analysis system, which has a simple structure and is easy to operate, which can effectively guide the optimal operation of the distribution network and improve the operation of the distribution network. Efficiency, reduce power loss, improve power distribution management level and economic benefits.

The technical solution adopted by the utility model to solve its technical problems is: a distribution network economic operation and optimization analysis system, which includes an intelligent distribution station area, an intelligent distribution terminal, a communication network, a master station system, and a distribution transformer. The intelligent distribution station area is connected to the main station system through a communication network, the intelligent distribution station area is connected to a power distribution transformer, and the power distribution transformer is connected to an intelligent power distribution terminal.

The beneficial effects of the utility model are:

1. Based on this, the utility model provides a distribution network economic operation and optimization analysis system, the system includes intelligent distribution station area, intelligent distribution terminal, communication network and master station system and other parts. The intelligent distribution station area and the intelligent distribution terminal configured in it adopt an integrated design scheme to realize distribution transformer monitoring, low-voltage switch control, protection, harmonic monitoring, etc. The communication network adopts the GPRS-based wireless communication method, and uses the latest standard protocol of the power grid to exchange information with the master station. Based on redundant commercial database and memory database, the main station system adopts C/S and B/S hybrid architecture mode, pre-cluster collection, server cluster processing technology, advanced distributed data processing and storage solutions, and load balancing mechanism. The utility model realizes the monitoring, control, and data analysis of the station area; realizes energy saving and loss reduction in the station area, improves the voltage qualification rate, and improves the reliability of power supply, so that the management of the distribution station area is refined, intelligent and scientific. The distribution station area analysis and optimization analysis system proposed by the utility model based on the intelligent station area will effectively guide the optimization operation of the distribution network, improve the operation efficiency of the distribution network, reduce power loss, and improve the distribution management level And economic benefits, to achieve scientific, intelligent and refined management of distribution stations.

【Description of drawings】

Figure 1 is a schematic structural diagram of a distribution network economic operation and optimization analysis system.

Fig. 2 is a structural schematic diagram of an embodiment of the intelligent distribution station of the present invention.

Fig. 3 is a structural diagram of an intelligent power distribution terminal of the present invention according to an embodiment.

Fig. 4 is a function realization diagram of the intelligent distribution station area of the present invention according to an embodiment.

Fig. 5 is a schematic structural diagram of a master station system of the present invention according to an embodiment.

Explanation of reference signs: 1-intelligent distribution station area; 2-intelligent distribution terminal; 3-communication network; 4-main station system; 5-distribution transformer; 11-intelligent protection switch; 13-intelligent distribution transformer terminal; 18-General meter; 16-Reactive power compensation capacitor; 17-Debugging host; 32-Acquisition server; 33-Application server; 34-Web server; 36-Web client.

【detailed description】

The utility model will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not intended to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

As shown in Figure 1, Figure 1 is a schematic structural diagram of a distribution network economic operation and optimization analysis system. An economical operation and optimization analysis system of a distribution network provided by the utility model includes: an intelligent distribution station area 1 , an intelligent distribution terminal 2 , a communication network 3 , and a master station system 4 .

Among them, the intelligent distribution station area 1 realizes various functions such as data monitoring, power quality monitoring, reactive power compensation, and protection of the distribution transformer 5, and the intelligent power distribution terminal 2 integrates distribution transformer monitoring, power quality monitoring, temperature and humidity measurement, low-voltage The integration of various functions such as switch communication makes it highly integrated, advanced in technology, and powerful in function. It supports wireless communication methods such as GPRS/GSM, and supports remote control, remote communication, and remote software upgrades. The intelligent power distribution station area 1 and the intelligent power distribution terminal 2 exchange information through the communication network 3 and the main station system 4 . The communication network 3 is the link between the master station system 4 and the smart distribution station area 1 and the smart power distribution terminal 2, and provides a basis for information interaction between the master station system 4 and the smart distribution station area 1. This system intends to use the long-distance communication channel: GPRS/CDMA wireless communication network, so it can be used in areas covered by GPRS/CDMA network information.

As shown in Figure 2, Figure 2 is an intelligent distribution transformer area of a distribution network economic operation and optimization analysis system. The intelligent distribution transformer area 1 of the distribution network economic operation and optimization analysis system of the utility model is composed of an intelligent protection switch 11, an intelligent distribution transformer terminal 13, a general meter 18, and a reactive power compensation capacitor 16, etc., and is compact, integrated, Intelligent features, among which the intelligent protection switch 11 can realize short-circuit protection, overload protection, and residual current protection, can realize reclosing function, and can output current, voltage, power factor, residual current and other related data at the same time, with optional communication interface , Realize the functions of remote control disconnection and fixed value remote management. The intelligent distribution transformer terminal 13 is the center of on-site data collection, processing, and transmission, collecting voltage, current, active power, reactive power, power factor, etc. on the low-voltage bus; collecting switch data and meter data; realizing automatic reactive power compensation, and monitoring cabinet doors , Measuring door status; Realize automatic transmission of fault information; Realize remote control, remote parameter setting, remote maintenance, etc., and perform information interaction with the master station system 3 through the GPRS network, and debug the intelligent power distribution terminal through the debugging host 17.

As shown in Figure 3, Figure 3 is a structural diagram of an intelligent power distribution terminal of a distribution network economic operation and optimization analysis system. The intelligent power distribution terminal 2 of the distribution network economic operation and optimization analysis system of the utility model adopts a 32-bit high-performance CPU and an embedded real-time operating system, and has strong real-time computing and processing capabilities. Equipped with non-power-off working RAM and high-performance CPU monitoring chip. The device works stably and reliably, and data will not be lost in the event of power failure. Using the self-developed TCP/IP and FTP protocol library, the terminal networking speed is faster, the networking process is controllable, and supports online upgrade of local and remote software and meter protocol library. Local upgrade is through USB interface, and remote upgrade can choose FTP or TCP/ IP mode, the upgrade speed is fast. The terminal adopts a modular design with perfect interfaces; the communication module can be flexibly configured (different plug-ins can be selected), and it supports wired and wireless network communication methods such as GPRS/CDMA Ethernet. Support antenna integration, built-in, external mode can be changed. It has perfect electromagnetic compatibility and reliability design, and dual watchdog circuits to ensure safe and reliable operation of the terminal and easy maintenance. It is specially configured with DC sampling to collect PT100 sensor or 4-20mA signal, which is convenient for transformer parameter collection. The terminal adopts a dedicated high-precision metering chip, which has high acquisition accuracy, fast speed, complete parameters, and supports 19th harmonic acquisition. It adopts specially designed power supply module with wide voltage input and three-phase power supply, and it can work normally when two phases are missing. Adopt high-precision real-time clock module without power down. The terminal has the meter reading function of the data concentrator, and has a strong self-inspection function, reactive power switching function, and multiple sets of capacitor groups can be cycled in groups. The terminal is equipped with multiple communication interfaces, which can be configured internally for communication, and can also be configured externally for transparent forwarding, which is convenient for users to expand communication.

Figure 4 shows the function realization diagram of the intelligent distribution station area. It realizes the production, management, analysis and maintenance of the distribution station area through the operation management system. Through the intelligent distribution transformer terminal 2, functions such as distribution transformer monitoring, intelligent switch control, and parameter management in the distribution station area are realized. The operation management terminal of the distribution station area directly collects three-phase current and three-phase voltage, and calculates distribution transformer operation data such as active power, reactive power, power factor, and zero-sequence current according to the results of AC sampling. If the switch adopts an intelligent residual current circuit breaker, the state of the switch, the leakage value, etc. are transmitted to the master station system 4 through the intelligent distribution transformer terminal 2 through the communication of the switch. If no intelligent residual current circuit breaker is installed, the state of the switch is collected through the DI interface, and the leakage value is connected to the intelligent distribution transformer terminal 2 by installing a leakage CT for measurement, and then transmitted to the master station system 4 . The room temperature, humidity and other information of the distribution station are connected through the AI and DI interfaces, and then sent to the master station system through the intelligent distribution transformer terminal 2. The inspection uses smart hand-held inspection equipment (PDA or smart phone) + positioning point (QR code). Inspection statistics and analysis.

For the communication network 3, through the comparative study of the advantages and disadvantages of various communication methods and operating costs, combined with the communication needs of the operation of the distribution station area, a set of communication solutions with reasonable cost, perfect technology, high safety and reliability, and easy promotion will be constructed . The GPRS (General Packet Radio service) communication mode is used to develop and optimize the communication module of the distribution network intelligent terminal to meet the requirements of communication stability and reliability. GPRS is a packet-switched data bearing and transmission method developed on the basis of GSM, and it is widely used in embedded systems. Since the GPRS communication network realizes networking and roaming, there is no need to set up a dedicated communication network to transmit data through the network. The communication protocol supports the protocol of DL/T376.1 "Communication Protocol for Power User Information Acquisition System", the protocol of Q/GDW130-2005 "Data Transmission Protocol of Power Load Management System", and the protocol of DL/T645-1997 "Communication Protocol for Multi-function Energy Meters" Protocol, DL/T645-2007 "Communication Protocol for Multi-function Electric Energy Meter" protocol, etc.

FIG. 5 is a schematic structural diagram of the master station system of the present invention. The configuration of the main station system 4 of the distribution network economic operation and optimization analysis system of the utility model includes: a collection server 32 , an application server 33 , and a Web server 34 . The entire system adopts a redundant database and network structure. The acquisition server 32 and application server 33 can adopt various methods such as single machine, dual machine hot standby, cluster, etc. according to the size of the system. The system is based on the distributed task management service mechanism and adopts load balancing technology . The failure of any computer in the system will not affect the realization of the functions of other nodes; the performance of the system can be easily completed by adding computer nodes; the expansion of the system can be realized through the configuration of the man-machine interface. Make the system have good stability, reliability and scalability.

The acquisition server 32 communicates with the intelligent distribution transformer terminal 2 through the communication network 3, realizes data acquisition tasks such as the analysis of the protocol, the conversion of the original code to the engineering value, and sends the analyzed data to the server as required or directly stores it in the historical database For other service analysis and query. If there are many intelligent distribution transformer terminals to be collected, the collection server adopts the cluster mode to collect data separately by area, and then aggregate them into the server and database.

The work completed by the application server 33 includes: real-time data discrimination, calculation, sampling processing; historical data storage and retrieval; alarm generation, accident judgment; various statistics and analysis of data; report processing; data based on basic data and statistical analysis Generate optimized operation measures and transformation plans. The application server expands accordingly according to the size of the information to be processed, the number of functional modules, and the performance required by the customer. For example, in a large-scale system, a server cluster is configured to quickly realize various analysis and processing of functional modules.

According to the development of technology and the actual needs of users, the monitoring and management of the distribution station area gradually changed from the C/S mode to the B/S mode, so the publishing and interactive functions of the Web server 34 will realize the All functions that need to be realized enable each Web client 36 connected to the MIS network to monitor the real-time and historical information of the distribution station area through browser tools such as IE according to authorization, and realize Web-based control and setting operations. Web client 36 realizes system operation maintenance and configuration modification; display of various real-time and non-real-time screens and tables such as the primary wiring diagram of the power grid; and other operations, and record and print; check the primary and secondary equipment parameters of the power grid, protection settings and other related information; realize real-time text and sound alarms, event sequence records and other alarm information recording and printing, etc. The full-featured realization of the Web client 36 facilitates system maintenance, system deployment, and user use.

Claims (1)

1. A distribution network economical operation and optimization analysis system, characterized in that: it includes an intelligent distribution station area, an intelligent distribution terminal, a communication network, a master station system, and a distribution transformer, and the intelligent distribution station area passes The communication network is connected to the main station system, the intelligent power distribution station area is connected to the power distribution transformer, and the power distribution transformer is connected to the intelligent power distribution terminal.