CN100390691C

CN100390691C - Intelligent transformer station monitoring system with embedded Ethernet interfaces

Info

Publication number: CN100390691C
Application number: CNB2004100137759A
Authority: CN
Inventors: 曲延滨
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2004-05-26
Filing date: 2004-05-26
Publication date: 2008-05-28
Anticipated expiration: 2024-05-26
Also published as: CN1584766A

Abstract

The present invention relates to a monitoring system for embedded ethernet interfaces in an intelligent transformer station, more specifically to a monitoring system for embedded ethernet interfaces in an intelligent transformer station. The analog quantity of keyboard switching in and switching off quantity is input, and the output end and the input end of an output circuit (1) are connected with the output end and the input end of a central processor (3). The display output end of the central processor (3) is connected with the input end of a display circuit (2), and a communication port of the central processor (3) is connected with the data input and output end of a digital communication circuit (4). The ethernet interface end of the digital communication circuit (4) is connected with an ethernet, and a frequency signal of an AC electric network is input to the input end of a frequency shaping circuit (5). The signal output end of the frequency shaping circuit (5) is connected with the frequency detection input end of the central processor (3), and a memory port of the central processor (3) is connected with the input end and the output end of a memory chip (6). The present invention can monitor all the operating data of the transformer substation in a real-time mode and in a long-distance mode, and simultaneously, has the advantages of great simplification of communication circuits, great improvement of reliability, clear network hierarchy, firm software, high maintainability, high transmission speed, parallel processing and high real-time performance.

Description

The intelligent substation supervisory system of embedded ethernet interface

Technical field:

What the present invention relates to is monitoring system of electric substation, specifically is a kind of intelligent substation supervisory system of embedded ethernet interface.

Background technology:

Automation of transformation substations technology derives from the thought that production, transmission, the application of electric energy is realized full process automatization in transformer station.Electric substation automation system has following function usually: data acquisition, supervision and control function; Localization of fault, isolation and automatic the recovery are sent; Reactive-load compensation and voltage-regulation; The field apparatus management; Long distance meter reading and electric energy metrical and load control and management etc.At present at the RTU of the actual use of China's power industry polytype is arranged, but mainly contain following a few class: a kind of is centralized system controlled by computer type RTU, belongs to second generation RTU product, and this product is still being used in some place.Its principal feature is to manage the work of all RTU with a CPU, low price, but major defect is arranged, and as: 1. standardization level is low, is difficult to the product compatibility with other producers; 2. structure is single, and extendability is poor; 3. the CPU burden is heavy, thereby causes systemic breakdown, poor reliability easily; 4. real-time responsiveness is poor, and remote signalling resolution is low; 5. debugging is complicated, difficult in maintenance.Because the existing above-mentioned shortcoming of centralized RTU can not adapt to the requirement of modern power systems robotization to real-time, extendability, accuracy and reliability.Another kind is RTU distributed, many CPU, function distribution, many CPU, modular RTU have the following characteristics: the 1. difference of image data object is distributed in different function (as remote measurement, remote signalling, switching value, pulsed quantity etc.) on the different modules and finishes.Each module all has independent CPU control, and can get in touch by channel and other modules; 2. function can be expanded as required; 3. because a plurality of CPU bear the work of RTU jointly, improved the data-handling capacity of system, response speed is accelerated, and resolution improves; 4. antijamming capability improves, and reliability strengthens; Debugging is simple, safeguards easily.Distributed RTU compares with centralized RTU, qualitative leap is all arranged on function and performance, but still have deficiency, and be mainly reflected in the following aspects: standardization level is low, poor compatibility, and stability and antijamming capability are not enough.That application is more at present is the RTU of field bus type structure, by introducing the open network bus, RTU is distributed in each on-the-spot module connects.It has following characteristics: 1. utilize universal serial bus can realize the installation nearby of control module, reduce wiring; 2. because the opening of bus, thereby networking flexibility, degree of product standardization height can be realized convenient interconnected; 3. easy and electric substation automation system is formed one.But also there are many deficiencies in field bus technique in its evolution, be embodied in: 1. existing standard for Fieldbus is too much, and only international standard IEC 61158 has just comprised 8 types, fails unified on single standard; 2. can not be compatible between the different bus, can not really realize the transparent information exchanging visit, can't realize the seamless integrated of information; 3. because fieldbus is special-purpose real-time Communication for Power network, cost is higher; 4. the speed of fieldbus is lower, and the application of support is limited, is not easy to the information integration with Internet.

Summary of the invention:

The intelligent substation supervisory system that the purpose of this invention is to provide a kind of embedded ethernet interface.But all service datas of the present invention's real-time remote monitoring transformer station.The present invention is made up of keyboard switch amount analog quantity imput output circuit 1, display circuit 2, center processor 3, digital telecommunication circuit 4, frequency shaping circuit 5, monitoring storage chip 6; The input/output terminal of keyboard switch amount analog quantity imput output circuit 1 connects the I/O of center processor 3, the demonstration output terminal of center processor 3 connects the input end of display circuit 2, the communication port of center processor 3 connects the data input/output terminal of digital telecommunication circuit 4, the Ethernet interface end of digital telecommunication circuit 4 is connected on the Ethernet, the frequency signal of AC network is input to the input end of frequency shaping circuit 5, the signal output part of frequency shaping circuit 5 connects the frequency detecting input end of center processor 3, and the storage port of center processor 3 connects on the input/output terminal of monitoring storage chip 6; Described digital telecommunication circuit 4 is made up of digital signal processor 4-1, the second programmable logic device (PLD) 4-2, ethernet controller 4-3, filter transformer 4-4, Ethernet joint 4-5; The data input/output terminal of the communication port linking number word signal processor 4-1 of center processor 3, another data I/O of digital signal processor 4-1 connects the data input/output terminal of the second programmable logic device (PLD) 4-2, another data I/O of the second programmable logic device (PLD) 4-2 connects the data input/output terminal of ethernet controller 4-3, another data I/O of ethernet controller 4-3 connects the data input/output terminal of filter transformer 4-4, and filter transformer 4-4 is connected with Ethernet by Ethernet joint 4-5.Principle of work: detect by keyboard switch amount analog quantity imput output circuit 1,5 pairs of power station parameters of frequency shaping circuit, its parameter comprises: voltage, electric current, frequency, applied power, active power, reactive power, power factor, and above-mentioned parameter is input in the center processor 3, through being transferred to real monitoring when carrying out far-end on the computing machine of far-end by digital telecommunication circuit 4, Ethernet after the overall treatment of center processor 3.The present invention can real-time remote monitoring all service datas of transformer station, and have simultaneously that communication line is greatly simplified, reliability significantly improves, network layer is clearly demarcated, software is firm, maintainability performance is good, the advantage of high-speed transfer, parallel processing, real-time height, flexible, the active and standby supervisory control comuter easy switching of equipment increase and decrease.

Description of drawings:

Fig. 1 is an one-piece construction synoptic diagram of the present invention, and Fig. 2 is the electrical block diagram of keyboard switch amount analog quantity imput output circuit 1, and Fig. 3 is the electrical block diagram of digital telecommunication circuit 4, and Fig. 4 is the electrical block diagram of frequency shaping circuit 5.

Embodiment:

In conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 present embodiment is described, present embodiment is made up of keyboard switch amount analog quantity imput output circuit 1, display circuit 2, center processor 3, digital telecommunication circuit 4, frequency shaping circuit 5, monitoring storage chip 6; The input/output terminal of keyboard switch amount analog quantity imput output circuit 1 connects the I/O of center processor 3, the demonstration output terminal of center processor 3 connects the input end of display circuit 2, the communication port of center processor 3 connects the data input/output terminal of digital telecommunication circuit 4, the Ethernet interface end of digital telecommunication circuit 4 is connected on the Ethernet, the frequency signal of AC network is input to the input end of frequency shaping circuit 5, the signal output part of frequency shaping circuit 5 connects the frequency detecting input end of center processor 3, and the storage port of center processor 3 connects on the input/output terminal of monitoring storage chip 6; Described digital telecommunication circuit 4 is made up of digital signal processor 4-1, the second programmable logic device (PLD) 4-2, ethernet controller 4-3, filter transformer 4-4, Ethernet joint 4-5; The data input/output terminal of the communication port linking number word signal processor 4-1 of center processor 3, another data I/O of digital signal processor 4-1 connects the data input/output terminal of the second programmable logic device (PLD) 4-2, another data I/O of the second programmable logic device (PLD) 4-2 connects the data input/output terminal of ethernet controller 4-3, another data I/O of ethernet controller 4-3 connects the data input/output terminal of filter transformer 4-4, and filter transformer 4-4 is connected with Ethernet by Ethernet joint 4-5; Keyboard switch amount analog quantity imput output circuit 1 selects a data switch 1-5, driver 1-6, relay 1-7, high speed photo coupling 1-8, switch S 1, switch S 2, switch S 3, switch S 4, resistance R 1, resistance R 2, resistance R 3, resistance R 4 to form by high speed static RAM 1-1, the first programmable logic device (PLD) 1-2, D/A converter 1-3, amplifier IC1, A/D converter 1-4, eight; The data input/output terminal of high speed static RAM 1-1 connects the data I/O of center processor 3, another data I/O of high speed static RAM 1-1 connects the data input/output terminal of the first programmable logic device (PLD) 1-2, the data output end of the first programmable logic device (PLD) 1-2 connects the data input pin of D/A converter 1-3, the two-way analog signal output of D/A converter 1-3 amplifies back output control simulating signal by amplifier IC1, the voltage of AC network, current analog signal selects a data switch 1-5 to be input among the A/D converter 1-4 by eight, the data output end of A/D converter 1-4 connects the data input end of the first programmable logic device (PLD) 1-2, the drive controlling output terminal of the first programmable logic device (PLD) 1-2 connects the input end of driver 1-6, the output terminal of driver 1-6 connects the input end of relay 1-7, switching value and pulsed quantity are connected to another data input pin of the first programmable logic device (PLD) 1-2 by high speed photo coupling 1-8, one end of switch S 1, one end of switch S 2, one end of switch S 3 is connected with an end of switch S 4 and ground connection, the other end of switch S 1, one end of resistance R 1 is connected with the pin DOWN7 end of the first programmable logic device (PLD) 1-2, the other end of switch S 2, one end of resistance R 2 is connected with the pin UP99 end of the first programmable logic device (PLD) 1-2, the other end of switch S 3, one end of resistance R 3 is connected with the pin RIGHT99 end of the first programmable logic device (PLD) 1-2, the other end of switch S 4, one end of resistance R 4 is connected the other end of resistance R 1 with the pin LEFT31 end of the first programmable logic device (PLD) 1-2, the other end of resistance R 2, the other end of resistance R 3 is connected with the other end of resistance R 4 and connects power supply+Vcc end; Digital telecommunication circuit 4 is made up of digital signal processor 4-1, the second programmable logic device (PLD) 4-2, ethernet controller 4-3, filter transformer 4-4, Ethernet joint 4-5; The data input/output terminal of the communication port linking number word signal processor 4-1 of center processor 3, another data I/O of digital signal processor 4-1 connects the data input/output terminal of the second programmable logic device (PLD) 4-2, another data I/O of the second programmable logic device (PLD) 4-2 connects the data input/output terminal of ethernet controller 4-3, another data I/O of ethernet controller 4-3 connects the data input/output terminal of filter transformer 4-4, and filter transformer 4-4 is connected with Ethernet by Ethernet joint 4-5; Frequency shaping circuit 5 is made up of amplifier IC2, amplifier IC3, diode D1, diode D2, diode D3, diode D4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, capacitor C 1; The anode of diode D1, the negative electrode of diode D2 is connected with the in-phase input end of amplifier IC2, the negative electrode of diode D1, the anode of diode D2, one end of resistance R 5 is connected with the inverting input of amplifier IC2, the output terminal of amplifier IC2, the other end of resistance R 5, one end of capacitor C 1 is connected with an end of resistance R 6, the other end ground connection of capacitor C 1, the other end of resistance R 6, one end of resistance R 7 is connected with the in-phase input end of amplifier IC3, the reverse inter-input-ing ending grounding of amplifier IC3, the other end of resistance R 7, the output terminal of amplifier IC3 is connected with an end of resistance R 8, the negative electrode of diode D3 connects power supply+Vcc end, the plus earth of diode D4, the other end of resistance R 8, the anode of diode D3, the negative electrode of diode D4 is connected with the frequency detecting input end of center processor 3.The model that display circuit 2 is selected for use is QPY-ENH6255, the model that center processor 3 is selected for use is TMS320LF2407, the model that monitoring storage chip 6 is selected for use is X25045, the model that high speed static RAM 1-1 selects for use is IS61LV6416, the model that the first programmable logic device (PLD) 1-2 selects for use is MAX7128STC100-6, the model that D/A converter 1-3 selects for use is MX7545, the model that amplifier IC1 selects for use is OP07, the model that A/D converter 1-4 selects for use is AD1674, eight models of selecting a data switch 1-5 to select for use are LF13508, the model that driver 1-6 selects for use is MC1413, the model that high speed photo coupling 1-8 selects for use is HCPL2631, the model that digital signal processor 4-1 selects for use is TMS320VC5402, the model that the second programmable logic device (PLD) 4-2 selects for use is XC95144x1, the model that ethernet controller 4-3 selects for use is RTL8019AS, the model that filter transformer 4-4 selects for use is HR61101G, the model that Ethernet interface 4-5 selects for use is RJ45, the model that amplifier IC2 selects for use is OP07, and the model that amplifier IC3 selects for use is OP07.

Claims

1. the intelligent substation supervisory system of embedded ethernet interface is characterized in that it is made up of keyboard switch amount analog quantity imput output circuit (1), display circuit (2), center processor (3), digital telecommunication circuit (4), frequency shaping circuit (5), monitoring storage chip (6); The input/output terminal of keyboard switch amount analog quantity imput output circuit (1) connects the I/O of center processor (3), the demonstration output terminal of center processor (3) connects the input end of display circuit (2), the communication port of center processor (3) connects the data input/output terminal of digital telecommunication circuit (4), the Ethernet interface end of digital telecommunication circuit (4) is connected on the Ethernet, the frequency signal of AC network is input to the input end of frequency shaping circuit (5), the signal output part of frequency shaping circuit (5) connects the frequency detecting input end of center processor (3), and the storage port of center processor (3) connects on the input/output terminal of monitoring storage chip (6); Described digital telecommunication circuit (4) is made up of digital signal processor (4-1), second programmable logic device (PLD) (4-2), ethernet controller (4-3), filter transformer (4-4), Ethernet joint (4-5); A data input/output terminal of the communication port linking number word signal processor (4-1) of center processor (3), another data I/O of digital signal processor (4-1) connects a data input/output terminal of second programmable logic device (PLD) (4-2), another data I/O of second programmable logic device (PLD) (4-2) connects a data input/output terminal of ethernet controller (4-3), another data I/O of ethernet controller (4-3) connects a data input/output terminal of filter transformer (4-4), and filter transformer (4-4) is connected with Ethernet by Ethernet joint (4-5).

2. the intelligent substation supervisory system of embedded ethernet interface according to claim 1 is characterized in that keyboard switch amount analog quantity imput output circuit (1) selects a data switch (1-5), driver (1-6), relay (1-7), high speed photo coupling (1-8), switch S 1, switch S 2, switch S 3, switch S 4, resistance R 1, resistance R 2, resistance R 3, resistance R 4 to form by high speed static RAM (1-1), first programmable logic device (PLD) (1-2), D/A converter (1-3), amplifier (IC1), A/D converter (1-4), eight; A data input/output terminal of high speed static RAM (1-1) connects the data I/O of center processor (3), another data I/O of high speed static RAM (1-1) connects the data input/output terminal of first programmable logic device (PLD) (1-2), the data output end of first programmable logic device (PLD) (1-2) connects the data input pin of D/A converter (1-3), the two-way analog signal output of D/A converter (1-3) amplifies back output control simulating signal by amplifier (IC1), the voltage of AC network, current analog signal selects a data switch (1-5) to be input in the A/D converter (1-4) by eight, the data output end of A/D converter (1-4) connects a data input end of first programmable logic device (PLD) (1-2), the drive controlling output terminal of first programmable logic device (PLD) (1-2) connects the input end of driver (1-6), the output terminal of driver (1-6) connects the input end of relay (1-7), switching value and pulsed quantity are connected to another data input pin of first programmable logic device (PLD) (1-2) by high speed photo coupling (1-8), one end of switch S 1, one end of switch S 2, one end of switch S 3 is connected with an end of switch S 4 and ground connection, the other end of switch S 1, one end of resistance R 1 is connected with the pin DOWN7 end of first programmable logic device (PLD) (1-2), the other end of switch S 2, one end of resistance R 2 is connected with the pin UP99 end of first programmable logic device (PLD) (1-2), the other end of switch S 3, one end of resistance R 3 is connected with the pin RIGHT99 end of first programmable logic device (PLD) (1-2), the other end of switch S 4, one end of resistance R 4 is connected the other end of resistance R 1 with the pin LEFT31 end of first programmable logic device (PLD) (1-2), the other end of resistance R 2, the other end of resistance R 3 be connected with the other end of resistance R 4 and connect power supply (+Vcc) end.

3. the intelligent substation supervisory system of embedded ethernet interface according to claim 1 is characterized in that frequency shaping circuit (5) is made up of amplifier IC2, amplifier IC3, diode D1, diode D2, diode D3, diode D4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, electric capacity (C1); The anode of diode D1, the negative electrode of diode D2 is connected with the in-phase input end of amplifier IC2, the negative electrode of diode D1, the anode of diode D2, one end of resistance R 5 is connected with the inverting input of amplifier IC2, the output terminal of amplifier IC2, the other end of resistance R 5, one end of electric capacity (C1) is connected with an end of resistance R 6, the other end ground connection of electric capacity (C1), the other end of resistance R 6, one end of resistance R 7 is connected with the in-phase input end of amplifier IC3, the reverse inter-input-ing ending grounding of amplifier IC3, the other end of resistance R 7, the output terminal of amplifier IC3 is connected with an end of resistance R 8, the negative electrode of diode D3 connect power supply (+Vcc) end, the plus earth of diode D4, the other end of resistance R 8, the anode of diode D3, the negative electrode of diode D4 is connected with the frequency detecting input end of center processor (3).