CN203104352U

CN203104352U - Generator excitation system provided with IEC61850 communication protocol interface

Info

Publication number: CN203104352U
Application number: CN 201220691995
Authority: CN
Inventors: 薛林锋
Original assignee: China National Electric Apparatus Research Institute Co Ltd
Current assignee: Guangzhou Kinte Industrial Co Ltd
Priority date: 2012-12-14
Filing date: 2012-12-14
Publication date: 2013-07-31
Anticipated expiration: 2022-12-14

Abstract

The utility model discloses a generator excitation system provided with an IEC61850 communication protocol interface; the system comprises an excitation regulator and an intelligent IO board for controlling the excitation regulator; the generator excitation system is characterized by also comprising a communication processor based on IEC61850 communication protocol; the intelligent IO board comprises a communication interface circuit, a microprocessor and a CAN bus communication circuit; the communication processor is connected with a corresponding port of the microprocessor through the communication interface circuit, and the excitation regulator is connected with a corresponding port of the microprocessor through the CAN bus communication circuit; the communication processor receives excitation data collected by an external monitor system provided with a communication protocol interface, classifies the received excitation data, and inputs the information to the microprocessor through the communication interface circuit; and the microprocessor controls the excitation regulator to work through the CAN bus communication circuit according to inputted signals. The generator excitation system provided with the IEC61850 communication protocol interface is high in data transmission real-time property and reliability, and can greatly reduce external wire connection.

Description

The generator excited system that possesses the IEC61850 communication protocol interface

Technical field

The utility model relates to a kind of generator excited system, specifically a kind of generator excited system that possesses the IEC61850 communication protocol interface.

Background technology

Raising along with the GPA degree, require generator excited system and supervisory control system to adopt the mode of digital communication to carry out the mutual of information, the communication protocol that adopts mainly contains traditional serial communication at present, private communication protocol as MODBUS etc. and foreign vendor, as MB+, PROFIBUS etc.The shortcoming of these two kinds of communication modes is that serial communication speed is limited, and underground can't the realization of private communication protocol details interconnected.

In addition, the information exchange that generator excited system and power plant monitoring system are carried out mainly comprises: the analog quantity input, as set end voltage, machine end electric current, exciting current etc., analog quantity output, as meritorious power, reactive power, exciting current, exciting voltage etc., switching value input is as the magnetic of start shooting, shut down, be incorporated into the power networks, increase, demagnetize, branch field suppression switch, close field suppression switch etc. and switching value is exported, as all kinds of faults, running status etc.; This four classes exchange message is having different requirements aspect real-time, the reliability, wherein the information of analog quantity input is that excitation system is controlled needed feedback quantity, real-time requires very high, and data volume is very big, each road signal all is three phase samplers, and each all requires promptly to finish the sampling and the transmission of 32 points in the 20ms at a power frequency period mutually, and requiring has very high real-time, promptly delays time less than 5ms; Switching value input signal as control command then exists very high requirement equally to real-time, reliability aspect, as minute field suppression switch order request action delay time at Millisecond, necessary absolute simultaneously is reliable, otherwise can bring serious accident after order is by tripping.In the prior art, for reaching above-mentioned four class exchange messages in the requirement aspect real-time and the reliability, all adopt hard wired mode to be connected between generator excited system and externally measured element and the control desk, make that the power plant internal wiring is various, serious interference is if adopt the mode of communication then network service has been proposed very high requirement.

The utility model content

The purpose of this utility model provides a kind of generator excited system of the IEC61850 of possessing communication protocol interface, its transfer of data real-time and reliability height, and can reduce external connection in a large number.

The purpose of this utility model is to realize by following technical measures:

A kind of generator excited system that possesses the IEC61850 communication protocol interface, comprise field regulator and the intelligent IO plate that is used to control described field regulator, it is characterized in that described generator excited system also comprises the IEC61850 communication processor based on IEC61850 communication protocol; Described intelligent IO plate comprises IEC61850 communication interface circuit, microprocessor, CAN bus communication circuit and power supply circuit; Described IEC61850 communication processor is connected with the corresponding port of microprocessor respectively by CAN bus communication circuit by IEC61850 communication interface circuit, described field regulator, the excitation data that the outer monitoring system acquisition that described IEC61850 communication processor reception has the IEC61850 communication protocol interface arrives, and the excitation data that receive are carried out being input to microprocessor by described IEC61850 communication interface circuit after the information classification, described microprocessor is controlled described field regulator work according to the signal of input by CAN bus communication circuit.

As a kind of improvement of the present utility model, described intelligent IO plate also comprises serial communication interface circuit; Described serial communication interface circuit is connected to the corresponding port of microprocessor, the excitation data that the outer monitoring system acquisition that described serial communication interface circuit reception has serial communication interface arrives, and the excitation data that receive are input to microprocessor, described microprocessor is controlled described field regulator work according to the signal of input by CAN bus communication circuit.

As a kind of execution mode of the present utility model, described IEC61850 communication processor receives the excitation data that outer monitoring system acquisition with IEC61850 communication protocol interface arrives by optical fiber.

Compared with prior art, the utlity model has following beneficial effect:

At first, field regulator is connected as a single entity by internal bus and intelligent IO plate in the utility model, intelligence IO plate is connected with the power plant external equipment by dual mode again, a kind of is traditional universal serial bus mode, a kind of is to realize IEC61850 communication by the IEC61850 communication processor, the utility model is incited somebody to action popular in the world communication protocol first Application in traditional generator excited system, by IEC61850 communication protocol, traditional generator excited system can be realized high speed data transfer with supervisory control system, has higher real-time, and the IEC61850 communication processor is classified to different types of information, can be with the requirement classification transmission of information according to real-time, can satisfy the requirement of excitation system after the classification to the high real-time data, therefore, the utility model carries out information exchange with the power plant monitoring system that adopts IEC61850 communication protocol, satisfy the needs of intelligent power plant construction, secondly, the measuring component that possesses communication interface of main flow all adopts IEC61850 communication protocol on the market at present, the excitation system of the utility model design can be attached thereto, once more, the utility model will a large amount of tradition adopts the connection of hardwire modes to change communication mode into and connects, can reduce in a large number excitation system to external connection; At last, communication media of the present utility model adopts optical fiber, has very strong anti-interference.

Description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is the schematic block circuit diagram of the utility model generator excited system;

Fig. 2 is one of circuit theory diagrams of the utility model generator excited system;

Fig. 3 is the circuit theory diagrams of CAN bus communication circuit A2 in the utility model generator excited system;

Fig. 4 is the circuit theory diagrams of serial communication interface circuit A4 in the utility model generator excited system.

Embodiment

As shown in Figure 1, the generator excited system that possesses the IEC61850 communication protocol interface of the present utility model comprises field regulator, is used to control the intelligent IO plate of field regulator and based on the IEC61850 communication processor of IEC61850 communication protocol; Wherein intelligent IO plate comprises IEC61850 communication interface circuit A1, microprocessor U18, CAN bus communication circuit A2, power supply circuit A3 and serial communication interface circuit A4.The IEC61850 communication processor is by IEC61850 communication interface circuit A1; field regulator is connected with the corresponding port of microprocessor U18 respectively by CAN bus communication circuit A2; serial communication interface circuit A4 is connected to the corresponding port of microprocessor U18; receive intelligent platform by IEC61850 communication protocol IEC61850 communication processor by optical fiber; promptly have the excitation data that the outer monitoring system acquisition of IEC61850 communication protocol interface arrives; comprise the analog quantity input; as set end voltage; machine end electric current; exciting current etc.; analog quantity output; as meritorious power; reactive power; exciting current; exciting voltage etc.; the switching value input; as start; shut down; be incorporated into the power networks; increase magnetic; demagnetize; divide field suppression switch; close the output of field suppression switch etc. and switching value; as all kinds of faults; running status etc.; and the excitation data that receive are carried out being input to microprocessor U18 by IEC61850 communication interface circuit A1 after the information classification, microprocessor U18 according to the signal of input by the work of CAN bus communication circuit A2 control field regulator.The excitation data that the outer monitoring system acquisition with serial communication interface of receiving serial communication interface circuit A4 arrives, and the excitation data that receive are input to microprocessor U18, microprocessor U18 according to the signal of input by the work of CAN bus communication circuit A2 control field regulator.Wherein, field regulator of the present utility model and IEC61850 communication processor are selected model commonly used on the market for use.

As shown in Figure 2, it is the microprocessor chip of C8051F040 that microprocessor U18 of the present utility model selects model for use, its technical manual according to microprocessor connects correspondent peripheral circuit, and wherein external equipment is programmed to microprocessor U18 by debugging programming mouth JTAG1; IEC61850 communication interface circuit A1 comprises that model is Transistor-Transistor Logic level conversion U15, terminal J13 and the peripheral circuit of SP3223, the 15th pin of Transistor-Transistor Logic level conversion U15 connects the terminals P 0.3 of microprocessor U18, the 13rd pin connects the terminals P 0.2 of microprocessor U18, and terminal J13 is connected with the IEC61850 communication process; Power supply circuit A3 comprises that external power source interface X8, model are that the Switching Power Supply U16 of EC3A21 and model are 1117 linear stabilized power supply U17 and peripheral circuit, its be respectively native system provide+24V ,+voltage and operating voltage VCC and the VCC1 of 5V.

As shown in Figure 3, CAN bus communication circuit A2 of the present utility model comprises that model is the CAN protocol conversion chip U14 of TJA1050, photoelectric isolated chip U3, U4 and terminal X7 and the peripheral circuit that model is TLP521-4, the terminal CAT of photoelectric isolated chip U3 is connected to the terminal CANTX of microprocessor U18 by resistance R 3, the terminal D of photoelectric isolated chip U4 is connected to the terminal CANRX of microprocessor U18, and terminal X7 is connected with the field regulator internal bus.

As shown in Figure 4, serial communication interface circuit A4 of the present utility model comprises terminal X9, model is the photoelectric isolated chip U5 of TLP521-4, U31, U8 and peripheral circuit, the terminal CAT of photoelectric isolated chip U31 is connected to the terminals P 0.4 of microprocessor U18 by resistance R 72, the terminal CAT of photoelectric isolated chip U8 is connected to the terminals P 0.0 of microprocessor U18 by resistance R 6, terminal X9 is the serial communication interface of circuit, be used for receiving the excitation data that outer monitoring system acquisition with serial communication interface arrives, realize that traditional universal serial bus mode communicates by letter by protocol converter.

In addition, the utility model also can adopt the structure of double-network redundant, disposes a circuit between two nets respectively, and the different network addresss is set, to improve the reliability of system;

The utility model does not limit to and above-mentioned embodiment; according to foregoing; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among the protection range of the present utility model.

Claims

1. generator excited system that possesses the IEC61850 communication protocol interface, comprise field regulator and the intelligent IO plate that is used to control described field regulator, it is characterized in that: described generator excited system also comprises the IEC61850 communication processor based on IEC61850 communication protocol; Described intelligent IO plate comprises IEC61850 communication interface circuit (A1), microprocessor (U18), CAN bus communication circuit (A2) and power supply circuit (A3); Described IEC61850 communication processor is by IEC61850 communication interface circuit (A1), described field regulator is connected with the corresponding port of microprocessor (U18) respectively by CAN bus communication circuit (A2), the excitation data that the outer monitoring system acquisition that described IEC61850 communication processor reception has the IEC61850 communication protocol interface arrives, and the excitation data that receive are carried out being input to microprocessor (U18) by described IEC61850 communication interface circuit (A1) after the information classification, described microprocessor (U18) according to the signal of input by the described field regulator work of CAN bus communication circuit (A2) control.

2. the generator excited system that possesses the IEC61850 communication protocol interface according to claim 1 is characterized in that: described intelligent IO plate also comprises serial communication interface circuit (A4); Described serial communication interface circuit (A4) is connected to the corresponding port of microprocessor (U18), the excitation data that the outer monitoring system acquisition with serial communication interface of receiving described serial communication interface circuit (A4) arrives, and the excitation data that receive are input to microprocessor (U18), described microprocessor (U18) according to the signal of input by the described field regulator work of CAN bus communication circuit (A2) control.

3. the generator excited system that possesses the IEC61850 communication protocol interface according to claim 1 and 2 is characterized in that: described IEC61850 communication processor receives the excitation data that outer monitoring system acquisition with IEC61850 communication protocol interface arrives by optical fiber.