CN103633735A - Transformer station primary state monitoring system based on IEC61850 protocol - Google Patents

Abstract

The invention relates to a substation primary equipment status monitoring system based on the IEC61850 protocol. The system includes a capacitive equipment monitoring device, a lightning arrester monitoring device, an oil chromatography monitoring device, a partial discharge monitoring device, a core current and top layer oil temperature monitoring device, and SF ₆ The density and micro-water monitoring device, the capacitive equipment comprehensive monitoring unit, the transformer comprehensive monitoring unit, the station-side monitoring unit and the main station, the capacitive equipment monitoring device and the lightning arrester monitoring device are respectively connected to the station-side monitoring unit through the capacitive equipment comprehensive monitoring unit, The oil chromatography monitoring device, partial discharge monitoring device, core current and top layer oil temperature monitoring device are respectively connected to the station-side monitoring unit through the transformer comprehensive monitoring unit, the SF ₆ density and micro-water monitoring device is connected to the station-side monitoring unit, and the station-side monitoring unit is connected to the main stand. The invention realizes the on-line monitoring of the state of the power transformation and power transmission equipment, and realizes the intelligentization and informatization of the equipment.

Description

Substation Primary Equipment Condition Monitoring System Based on IEC61850 Protocol

technical field

The invention belongs to the field of intelligent substations, in particular to a substation primary equipment state monitoring system based on the IEC61850 protocol.

Background technique

Intelligent substation is an important part of smart grid. Digitalization of equipment information, integration of functions, compact structure, and state-of-maintenance are the development directions of intelligent substations. Condition monitoring is a technical means to obtain the operating status of equipment, and is an important source of information for maintenance and operation and maintenance. It adopts information technology, installs monitoring devices with advanced sensing technology on the power transmission and transformation equipment of the substation, monitors the equipment with multiple parameters, collects data in real time, and comprehensively analyzes multiple information to realize the intelligence and informatization of power transmission and transformation equipment , to achieve the purpose of self-awareness of equipment operation status and automatic fault diagnosis. Condition monitoring technology is a technology that serves condition-based maintenance or predictive maintenance. Its development stems from the technical requirements of condition-based maintenance for the acquisition, analysis, and evaluation of power grid equipment status information. Therefore, the currently developed condition monitoring technologies are all developed for a certain type of equipment and a certain specific application, mainly focusing on specific equipment condition maintenance applications such as power generation equipment, substation equipment, and transmission lines. Due to the lack of a unified platform, various monitoring devices operate independently and operate in isolation, and resources cannot be shared. At the same time, the online monitoring data cannot be organically combined with other important state quantities, and its role in auxiliary diagnosis cannot be effectively played.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a substation primary equipment status monitoring system based on the IEC61850 protocol. The purpose of equipment status self-awareness and fault self-diagnosis is to provide data required for decision-making for production management, monitoring equipment selection, and smart grid decision-making analysis support technology.

The present invention solves its technical problem and realizes through the following technical solutions:

A substation primary equipment status monitoring system based on the IEC61850 protocol, the system includes capacitive equipment monitoring devices, lightning arrester monitoring devices, oil chromatography monitoring devices, partial discharge monitoring devices, core current and top layer oil temperature monitoring devices, SF ₆ density and micro The water monitoring device, the capacitive equipment comprehensive monitoring unit, the transformer comprehensive monitoring unit, the station monitoring unit and the main station, the capacitive equipment monitoring device and the lightning arrester monitoring device are respectively connected to the station terminal monitoring unit through the capacitive equipment comprehensive monitoring unit, and oil chromatography monitoring The device, partial discharge monitoring device, core current and top oil temperature monitoring device are respectively connected to the station-side monitoring unit through the transformer comprehensive monitoring unit, the SF ₆ density and micro-water monitoring device is connected to the station-side monitoring unit, and the station-side monitoring unit is connected to the main station.

Moreover, the capacitive equipment monitoring device and the lightning arrester monitoring device communicate with the capacitive equipment comprehensive monitoring unit through the CAN bus respectively.

Moreover, the oil chromatography monitoring device and the partial discharge monitoring device communicate with the transformer comprehensive monitoring unit through RS485 respectively.

Moreover, the monitoring device for iron core current and top layer oil temperature communicates with the transformer comprehensive monitoring unit through the CAN bus.

Moreover, the SF ₆ density and micro-water monitoring device communicates with the station-side monitoring unit through the IEC61850 protocol and optical fiber.

Moreover, the capacitive equipment integrated monitoring unit and the transformer integrated monitoring unit communicate with the station end monitoring unit through the IEC61850 protocol and optical fiber respectively.

Advantage of the present invention and beneficial effect are:

1. The substation primary equipment status monitoring system based on the IEC61850 protocol is based on the monitoring device of advanced sensing technology, realizes the online monitoring of the status of the substation and transmission equipment, realizes the intelligence and informatization of the equipment, and achieves self-awareness of the equipment status and fault detection. The purpose of self-diagnosis is to provide the data required for decision-making for production management, monitoring equipment selection, and smart grid decision-making analysis support technology.

2. The application of the present invention in the smart grid further expands the ability to obtain panoramic real-time information of the power grid. Through a safe, reliable and smooth communication channel, the acquisition, integration, analysis, and Reorganize and share. By strengthening the analysis, diagnosis and optimization of real-time and dynamic state information of the power grid, it can provide more comprehensive and detailed display of power grid operation status for power grid operation and management personnel, and provide corresponding control schemes, backup plans and auxiliary decision-making strategies. To maximize the safety, reliability, economy, efficiency and environmental protection of power grid operation.

Description of drawings

Fig. 1 is a structural connection block diagram of the present invention.

Detailed ways

The present invention will be described in further detail below through specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

A substation primary equipment status monitoring system based on the IEC61850 protocol, the system includes capacitive equipment monitoring devices, lightning arrester monitoring devices, oil chromatography monitoring devices, partial discharge monitoring devices, core current and top layer oil temperature monitoring devices, SF ₆ density and micro The water monitoring device, the comprehensive monitoring unit of capacitive equipment, the comprehensive monitoring unit of transformer, the station-side monitoring unit and the main station, the capacitive equipment monitoring device and the lightning arrester monitoring device are connected to the station-side monitoring unit through the capacitive The monitoring device and arrester monitoring device communicate with the capacitive equipment comprehensive monitoring unit through the CAN bus respectively. The oil chromatography monitoring device, partial discharge monitoring device, iron core current and top layer oil temperature monitoring device are respectively connected to the station end monitoring unit through the transformer comprehensive monitoring unit. The chromatographic monitoring device and the partial discharge monitoring device communicate with the transformer comprehensive monitoring unit through RS485, the iron core current and top layer oil temperature monitoring device communicate with the transformer comprehensive monitoring unit through CAN bus, and the SF ₆ density and micro-water monitoring devices are connected to the station monitoring unit. The SF ₆ density and micro-water monitoring device communicates with the station-side monitoring unit through the IEC61850 protocol and optical fiber, and the station-side monitoring unit is connected to the master station. The capacitive equipment comprehensive monitoring unit and the transformer comprehensive monitoring unit communicate with the station monitoring unit through the IEC61850 protocol and optical fiber respectively. The optical fiber adopts 100M optical fiber communication private network.

The capacitive equipment monitoring device can use Beijing State Grid Pratt High Voltage Company CMU0301S, the arrester monitoring device (Beijing State Grid Pratt High Voltage Company CMU0401S), the oil chromatography monitoring device can use Shanghai Siyuan TROM-600, and the partial discharge monitoring device can use British DMS PDM, core current and top layer oil temperature monitoring device can use Beijing State Grid Pratt High Voltage Company CMU0501S, SF ₆ density and micro water monitoring device can use Ningbo University of Technology MDS4000, capacitive equipment comprehensive monitoring unit can use Beijing State Grid General CMU90050 of Ruite High Voltage Company, Transformer Comprehensive Monitoring Unit (CMU90010 of Beijing State Grid Praite High Voltage Company), station end monitoring unit includes: cabinet (CMU99010 of Beijing State Grid Praite COMG3124F) and the master station (minicomputer server HP SuperDome).

The function of the capacitive equipment monitoring device: to monitor whether the insulation performance of the equipment with a large number of insulating structures in the substation is good, such as the end-screen capacitive current of transformer high-voltage bushings, capacitive current transformers, coupling capacitors, etc. Capacitance, dielectric loss, and capacitance change ratio are equal in order to detect insulation defects in time and ensure the safety of the power system.

The function of the lightning arrester monitoring device: to monitor the characteristic quantities of the lightning arrester, such as the full current, the resistive current, and the number of counter actions, and judge the aging and damp condition of the lightning arrester.

The function of the oil chromatography monitoring device: monitor hydrogen H ₂ , carbon monoxide CO, carbon dioxide CO ₂ , methane CH ₄ , ethane C ₂ H ₆ , ethylene C ₂ H ₄ , acetylene C ₂ H ₂ etc. The principle of the device: After the oil sample to be analyzed passes through the oil and gas separation device, the oil and gas are completely separated, and the separated mixed gas enters the gas chromatography separation system driven by the carrier gas, and the mixed gas passes through the same separation principle as the laboratory. Gas chromatography system, the gas is separated into single-component gases, and then analyzed.

The function of the partial discharge monitoring device: monitor the discharge volume, phase, pulse number, etc. The principle of the device: realize the location of the discharge area according to the propagation characteristics of the discharge signal in the transformer winding; according to the time difference between the ultrasonic signal and the discharge pulse signal , to achieve precise positioning of discharge defects.

The function of the iron core current and top oil temperature monitoring device: to monitor the multi-point grounding of the power transformer iron core and clamps, and the overload affects the insulation life and other defects. The main monitoring quantities are the iron core ground current and the top oil temperature.

The function of the SF ₆ density and micro-water monitoring device: to monitor temperature, density, dew point, etc. The principle of the device is based on multi-sensor information fusion technology, microelectronics technology, computer technology and fault diagnosis technology, and automatically completes the online monitoring Information collection of SF ₆ density and micro water.

The capacitive equipment comprehensive monitoring unit and the transformer comprehensive monitoring unit mainly realize the functions of monitoring data collection, data processing, communication protocol conversion, monitoring and early warning of related monitoring devices of the monitored equipment.

The station-side monitoring unit mainly has communication functions: ①Receive the monitoring data uploaded by the intelligent monitoring unit, ②collect the data of each state comprehensive monitoring unit in the substation, ③send the sampling cycle and data call instructions to the monitoring unit; Upload monitoring parameters and analysis conclusions. The station-side monitoring unit also has information processing functions. Centralized and real-time display of the grid equipment operation status monitoring data provided by each status monitoring unit, monitoring the operation status of the monitoring unit, providing data support for the main station system, and the system can complete simple data statistics, calculation, analysis, evaluation, and chart display and other functions . Realize the operation control of the entire online monitoring system, as well as the collection of online monitoring data of all substation equipment in the station, comprehensive analysis, fault diagnosis, monitoring and early warning, data display (set in the centralized control station), storage and standardized data forwarding and other functions.

Taking the oil chromatographic monitoring of transformers as an example, under the action of heat and electricity, the insulating oil decomposes into hydrogen, carbon monoxide, carbon dioxide and various small molecular hydrocarbon gases, and obtains H ₂ , CO, CO through the monitoring of dissolved gases in the oil. _2. The content of C ₂ H ₂ , CH ₄ and other gases, after data processing, preliminarily judges the abnormal data; the oil chromatography monitoring device communicates with the transformer comprehensive monitoring unit through the RS485 protocol, and then the transformer comprehensive monitoring unit converts to the IEC61850 protocol and then transmits To the station-end monitoring unit; through the station-end monitoring unit, the data is summarized, and the increase trend of the content of each component gas is preliminarily judged. If it exceeds the attention value, it should be combined with the gas production rate, according to the three ratios or other experience (such as TD diagram ), it is preliminarily judged that there is an overheating fault or a discharge fault. After the preliminary warning, it is sent to the master station. At the same time, it can also receive the communication command of the master station and send it to the monitoring unit through the IEC61850 protocol to realize two-way transmission.

Claims (6)

1. A substation primary equipment status monitoring system based on the IEC61850 protocol, characterized in that: the system includes a capacitive equipment monitoring device, a lightning arrester monitoring device, an oil chromatography monitoring device, a partial discharge monitoring device, a core current and a top layer oil temperature monitoring device , SF ₆ density and micro-water monitoring device, capacitive equipment comprehensive monitoring unit, transformer comprehensive monitoring unit, station end monitoring unit and master station, capacitive equipment monitoring device and lightning arrester monitoring device are respectively connected to the station end through the capacitive equipment comprehensive monitoring unit The monitoring unit, oil chromatography monitoring device, partial discharge monitoring device, core current and top layer oil temperature monitoring device are respectively connected to the station end monitoring unit through the transformer comprehensive monitoring unit, and the SF ₆ density and micro water monitoring device is connected to the station end monitoring unit, and the station end monitoring The unit is connected to the master station. 2. The substation primary equipment status monitoring system based on IEC61850 protocol according to claim 1, characterized in that: the capacitive equipment monitoring device and the arrester monitoring device communicate with the capacitive equipment comprehensive monitoring unit through the CAN bus respectively. 3. The substation primary equipment status monitoring system based on the IEC61850 protocol according to claim 1, characterized in that: the oil chromatography monitoring device and the partial discharge monitoring device communicate with the transformer comprehensive monitoring unit through RS485 respectively. 4. The substation primary equipment condition monitoring system based on IEC61850 protocol according to claim 1, characterized in that: said core current and top layer oil temperature monitoring device communicates with the transformer comprehensive monitoring unit through CAN bus. 5. The substation primary equipment condition monitoring system based on IEC61850 protocol according to claim 1, characterized in that: said SF ₆ density and micro water monitoring device communicates with the station end monitoring unit through IEC61850 protocol and optical fiber. 6. The substation primary equipment status monitoring system based on the IEC61850 protocol according to claim 1, characterized in that: the capacitive equipment comprehensive monitoring unit and the transformer comprehensive monitoring unit communicate with the station end monitoring unit through the IEC61850 protocol and optical fiber respectively .