CN105634137B - Integral intelligent looped network switch apparatus - Google Patents

Abstract

The invention provides an integrated intelligent ring network switchgear, including a master control room equipped with a voltage transformer PT and a plurality of line unit rooms, and the primary equipment and secondary equipment in each unit room are highly integrated; the line unit rooms are real-time Monitor the voltage, current, power data and switch status of each line, and realize power metering and power quality monitoring. When a fault occurs in the power distribution network, it can realize fault location, fault isolation and consistent transfer; realize the status monitoring of primary equipment, It can monitor the temperature and humidity in the environment of the ring network cabinet to prevent condensation; the master control room can realize remote data transmission, alarm information and remote control through optical fiber communication or GPRS wireless public network. The invention can reduce installation, commissioning and maintenance costs, reduce workload, and is suitable for application in distribution network automation systems.

Description

Integrated intelligent ring network switchgear

technical field

The invention relates to the field of electric power technology, in particular to an integrated intelligent ring network switchgear.

Background technique

With the development of science and technology in our country, the electricity market economy has gradually formed. Under such a background, the weak link of the distribution network has been highlighted, resulting in the incoordination between people's production and living electricity and grid facilities and equipment, which has affected People's normal production and life, therefore, promoting the reform of the power industry and building the automation of urban distribution networks has become an urgent problem to be solved. The integrated intelligent ring network cabinet is conducive to the construction of power distribution automation in my country, and plays a very important role in promoting the reform of the power distribution system. Vigorously developing the integrated intelligent ring network cabinet for application and distribution control will bring good benefits to the local area. economic and social benefits.

Contents of the invention

The technical problem to be solved by the present invention is to provide an integrated intelligent ring network switchgear, which can reduce installation, commissioning and maintenance costs, reduce workload, and is suitable for application in distribution network automation systems.

The present invention is achieved in this way: the integrated intelligent ring network switchgear includes a master control room equipped with a voltage transformer PT and multiple line unit rooms, and the primary equipment and secondary equipment in each unit room are highly integrated;

The line unit room can be increased or decreased according to the number of equipment lines in the unit room, and a measurement and control module is embedded in the line unit room, and the external interface of the measurement and control module can realize plug and play;

The line unit room monitors the voltage, current, power data and switch status of each line in real time, and realizes power metering and power quality monitoring, and can realize fault location, fault isolation and load transfer when the power distribution network fails; The status monitoring of primary equipment can monitor the temperature and humidity in the environment of the ring network cabinet to prevent condensation;

The master control room can realize remote data transmission, alarm information and remote control through optical fiber communication or GPRS wireless public network.

Further, the integrated intelligent ring network switchgear also includes a plurality of switch rooms, and each switch room is equipped with a measurement, control and protection module, a main control management module and a UPS power supply module;

The measurement, control and protection modules adopt high-speed network communication technology to realize information interconnection. The main control management module is responsible for dispatching management in the station and information exchange of the main station. The UPS power supply module supplies power for each module and the operation circuit, and provides a backup uninterruptible power supply after the AC power failure ;

The main control management module and the background master station adopt active and standby dual-network communication channels, the main channel is optical fiber communication, and the backup channel is GPRS wireless public network; the main control management module and each measurement, control and protection module use high-speed Ethernet communication Way.

Further, the measurement, control and protection module can realize the functions of line measurement, electric energy metering, power quality analysis, fault identification and line protection, switch state collection, local and remote tripping and closing, data processing and state monitoring.

Further, the data processing includes analog input signal processing and switching input signal processing; the analog input signal processing includes data validity, correctness judgment, over-limit judgment and over-limit alarm, dead zone setting, operating parameters Extreme value recording, power supply pass rate statistics, digital filtering, error compensation, engineering unit conversion, and signal anti-interference functions; digital input signal processing includes photoelectric isolation, contact anti-shake processing, hardware and software filtering, reference time compensation, data Validity, and correctness judgment function.

Further, the electric energy metering function specifically includes: being able to measure forward active electric energy, reverse active electric energy, and four-quadrant reactive electric energy; and being able to form monthly settlement electric energy according to the set settlement date for line loss analysis.

Further, the power quality analysis specifically includes: monitoring of power quality indicators, voltage and current 2-50 harmonics and waveform distortion, three-phase voltage unbalance, voltage pass rate, power factor and frequency deviation.

Further, the integrated intelligent ring network switch device has a communication interface; the communication interface includes:

One communication channel between 100BASE-FX interface and master station, wavelength 1310nm, 155Mb/s, single mode;

Eight 10/100BASE-T interfaces for accessing eight measurement, control and protection modules;

One GPRS wireless communication channel, choose 3G/4G communication;

Two-way RS485 communication interface, communication rate 300~9600bps;

One RS232 local maintenance interface, the communication speed is 115200bps;

And a USB interface for quick software upgrades and quick system maintenance.

Further, the AB and CB phase-to-phase voltage transformers are installed in the master control room where the voltage transformer PT is installed for voltage measurement, and at the same time provide AC input for the power module; each cabinet is provided with a dedicated secondary channel and an instrument box, and each unit The communication among them adopts the Ethernet communication mode.

The present invention has the following advantages: through the cooperation of the master control room installed with voltage transformers PT, multiple line unit rooms, and multiple switch rooms, the optical fiber can be used to quickly transmit measurement and control signals, and can quickly perform fault location and detection, Greatly improved the reliability of power supply. Reduce installation, commissioning and maintenance costs, reduce workload, and are suitable for application in distribution network automation systems.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the switch chamber in the present invention.

Detailed ways

Please refer to Fig. 1 and shown in Fig. 2, the integrated intelligent ring network switchgear of the present invention, comprises a master control room and a plurality of line unit rooms that voltage transformer PT is installed, primary equipment and secondary in each unit room The equipment is highly integrated; the integrated design greatly improves reliability and facilitates installation and maintenance.

The line unit room can be increased or decreased according to the number of equipment lines in the unit room, and a measurement and control module is embedded in the line unit room, and the external interface of the measurement and control module can realize plug and play;

The line unit room monitors the voltage, current, power data and switch status of each line in real time, and realizes power metering and power quality monitoring, and can realize fault location, fault isolation and load transfer when the power distribution network fails; reduce power outages Time to reduce the blackout area. Realize the status monitoring of the primary equipment, monitor the temperature and humidity in the environment of the ring network cabinet, prevent condensation; improve the insulation level of the equipment, and avoid accidents.

The master control room can realize remote data transmission, alarm information and remote control through optical fiber communication or GPRS wireless public network.

In the present invention, the integrated intelligent ring network switchgear also includes a plurality of switch rooms, and each switch room is equipped with a measurement and control protection module, a main control management module and a UPS power supply module;

The measurement, control and protection modules adopt high-speed network communication technology to realize information interconnection. The main control management module is responsible for dispatching management in the station and information exchange of the main station. The UPS power supply module supplies power for each module and the operation circuit, and provides a backup uninterruptible power supply after the AC power failure The measurement, control and protection module can realize the functions of line measurement, electric energy metering, power quality analysis, fault identification and line protection, switch state acquisition, local and remote tripping and closing, data processing and state monitoring.

The main control management module and the background master station adopt active and standby dual-network communication channels, the main channel is optical fiber communication, and the backup channel is GPRS wireless public network; the main control management module and each measurement, control and protection module use high-speed Ethernet communication Way.

The data processing includes analog input signal processing and switching input signal processing; the analog input signal processing includes data validity, correctness judgment, over-limit judgment and over-limit alarm, dead zone setting, and extreme value recording of operating parameters , power supply qualification rate statistics, digital filtering, error compensation, engineering unit conversion, and signal anti-interference functions; switching input signal processing includes photoelectric isolation, contact anti-shake processing, hardware and software filtering, reference time compensation, data validity, And correctness judgment function.

The electric energy metering function specifically includes: it can measure forward active electric energy, reverse active electric energy, and four-quadrant reactive electric energy; it can form monthly settlement electric energy according to the set settlement date for line loss analysis.

The power quality analysis specifically includes: monitoring of power quality indicators, voltage and current 2-50 harmonics and waveform distortion, three-phase voltage unbalance, voltage pass rate, power factor and frequency deviation.

The AB and CB phase-to-phase voltage transformers are installed in the master control room where the voltage transformer PT is installed for voltage measurement, and at the same time provide AC input for the power module; each cabinet is provided with a dedicated secondary channel and instrument box, and the communication between each unit Adopt Ethernet communication mode.

1. Main control management module parameters

capacity

A maximum of 8 lines of measurement, control and protection modules can be connected

The curve record is not less than 180 days, the SOE event record is not less than 2048, the alarm event record is not less than 1024, and the fault record is not less than 512 groups

Storage space not less than 128MB

clock

Real-time clock, travel time error <0.5s/d, backup battery meets power failure and continues to travel for no less than 5 years

In the present invention, the integrated intelligent ring network switchgear has a communication interface; the communication interface includes:

One communication channel between 100BASE-FX interface and master station, wavelength 1310nm, 155Mb/s, single mode;

Eight 10/100BASE-T interfaces for accessing eight measurement, control and protection modules;

One GPRS wireless communication channel, choose 3G/4G communication;

Two-way RS485 communication interface, communication rate 300~9600bps;

One RS232 local maintenance interface, the communication speed is 115200bps;

And a USB interface for quick software upgrades and quick system maintenance.

letter of agreement

Uplink adopts IEC60870-5-104 protocol, local adopts IEC61850 protocol

Support IP, ARP, TCP, UDP, TFTP, SNTP and other protocols

Working power

24V, allow fluctuation ±30%; power consumption: not more than 10W

2. UPS power module parameters

enter

100/220VAC, allow fluctuation ±20%

Support dual AC input, hot standby, automatic zero-time switching

output

24V±10%; output power not less than 50W, short-term output 150W

backup battery

2 sets of 12V maintenance-free battery packs with a capacity of not less than 20Ah

After the line loses power, it can maintain the equipment working for at least 24 hours, and support the reliable operation of the switch for at least 4 times

3. Measurement, control and protection module parameters

AC Sampling Specifications

2-way voltage (Uab, Ucb), 4-way current (phase A, phase B, phase C, zero sequence)

Voltage input nominal value: 100V, measurement accuracy: ±0.2%FS

Current input nominal value: 5A, measurement accuracy: ±0.2%FS

Maximum fault current: 100A, measurement accuracy: ±2%FS

Acquisition accuracy of active power, reactive power and apparent power: ±0.5%FS

Power factor measurement accuracy: ±0.005

When the nominal value is input, the power consumption of each loop is less than 0.25VA

Electric energy metering technical indicators

Wiring mode: three-phase three-wire 3P3L

Current specification: 1(10)A

Electric energy error level: active power 0.5S, reactive power 2.0

Power quality technical indicators

Fundamental wave voltage error: ±0.2% Voltage deviation error: ±0.2%

Fundamental current error: ±0.5%

Frequency deviation error: ±0.01Hz Frequency measurement range: 45Hz～65Hz

Three-phase unbalance: the absolute error of voltage unbalance is 0.2%, the absolute error of current unbalance is 1%, and the sequence components of voltage and current are 0.5%.

Harmonic analysis: 2~50 times and THD, accuracy level A

Remote signaling technical indicators

6 switch input

Resolution less than 2 milliseconds

Hardware and software dual anti-shake, software anti-shake time 6-60000 milliseconds can be set

Protection Specifications

Three-stage phase-to-phase current protection:

a) Current setting: 0.1In～20In

b) Direction element: start by phase; the maximum sensitive angle is -30o, and the action range is 175±5°

c) Low voltage lockout: 2~100V (line voltage)

d) Fixed value error: no more than ±3%

Time setting:

a) Setting range: 0.1～10.0s

b) Setting error: <1.0s, no more than ±15ms; ≥1.0s, no more than ±1.5%

The whole set of action time:

Interphase current stage I (1.2 times the setting value): no more than 30ms

Return coefficient of current protection: not less than 0.95

Fault recording: 1~30 cycles

Remote Control Specifications

3-way relay output: 1-way opening signal, 1-way closing signal, 1-way alarm signal

Output mode: relay normally open contact

Contact capacity: 24V 10A

The action holding time of the remote control can be set manually

DC Flow Sampling Specifications

1 channel temperature: -50～+100℃, error ±1℃

1 way humidity: 0 ~ 100% RH, error ± 3%

2-way analog: 4-20mA/0-5V optional, error ±0.5% FS

Interface

Working power supply: 24V, allowable fluctuation ±30%; power consumption: not more than 5W

Communication interface: 10/100BASE-T, optional 100BASE-FX

Communication protocol: IEC61850 protocol is adopted, the measurement value is transmitted by MMS protocol SMV, and the switching value is transmitted by GOOSE

1 module maintenance interface, RS232, communication rate 115200bps

Module volume: no more than 100x160x60mm3

In addition, an integrated design is adopted for the opening equipment of the central network cabinet of the present invention, and the key parts are potted and shielded to achieve moisture-proof, moisture-proof, mold-proof, and anti-interference. Stable and reliable operation in a harsh environment, improve the adaptability to the environment, and reduce the adverse effects on the equipment caused by high temperature, high humidity, and large temperature difference changes in harsh environments;

The switchgear adopts fully insulated load switch and combined electrical cabinet, in which the loop-in and loop-out units can be electrically operated, and the detachable bushing type current transformer is installed, and the auxiliary position contact of the main switch is installed; the branch line and the transformer unit are installed with the auxiliary position of the main switch contacts. The ring-in/ring-out load switch operation can realize the remote control function; in addition, the ring-in/ring-out load switch cabinet is equipped with ABC phase current transformer and zero-sequence current transformer; Indicators, local/remote operation instructions all have position contact output;

The PT cabinet is equipped with AB and CB phase-to-phase voltage transformers for voltage measurement, and provides AC input for the power module at the same time;

Each cabinet is equipped with a dedicated secondary channel and instrument box, and the communication between each unit adopts the Ethernet communication method; the specifications of the charged display and fault indicator are unified; the switch cabinet is installed in the outdoor box to form an outdoor intelligent switch station.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (6)

1. integral intelligent looped network switch apparatus, it is characterised in that：The Master Control Room that is equipped with voltage transformer pt including one and Multiple line unit rooms, the primary equipment and secondary device in each unit room are highly integrated；

The line unit room can be increased or decreased according to the device line number in unit room, the line unit room An embedded control module, the external interface of the control module can realize plug and play；

The line unit room monitors voltage, electric current, power data and the on off state of every circuit in real time, and realizes electric energy meter Amount, electric energy quality monitoring can realize fault location, Fault Isolation and load transfer when distribution network breaks down；It realizes To the status monitoring of primary equipment, temperature, humidity in ring main unit environment can be monitored, prevents condensation；

The Master Control Room can realize remote data transmission, warning message and remote by fiber optic communication or GPRS wireless public network modes Process control；

The integral intelligent looped network switch apparatus further includes multiple switch room, and a monitoring and protection mould is installed by each switch gear room Block, the monitoring and protection intermodule realize information interconnection using high- speed network communication technology,

The monitoring and protection module can realize route survey, electrical energy measurement, power quality analysis, fault identification and route protection, On off state acquisition, on the spot with distant place breaker tripping and closing, data processing and status monitoring function；

The data processing includes analog input signal processing and On-off signal signal processing；The analog input signal Processing includes data validity, correctness differentiation, out-of-limit judgement and off-limit alarm, the dead time, operating parameter extreme value record, supplies Electric qualification rate statistics, digital filtering, error compensation, engineering unit transformation and signal anti-interference function；On-off signal signal Processing includes Phototube Coupling, the processing of contact stabilization, hardware and software filtering, fiducial time compensation, data validity, Yi Jizheng True property discrimination function.

2. integral intelligent looped network switch apparatus according to claim 1, it is characterised in that：The integral intelligent looped network Switchgear further includes a master control management module and a ups power module；

Master control management module is responsible for stand interior management and running and master information exchange, and ups power module is each module and operation circuit Power supply provides standby uninterruptible power supply after dead electricity is exchanged；

Using active and standby double Network Communication channels between the master control management module and backstage main website, main channel is fiber optic communication, spare Channel is GPRS wireless public networks；High speed Ethernet network communication mode is used between master control management module and each monitoring and protection module.

3. integral intelligent looped network switch apparatus according to claim 1, it is characterised in that：The electrical energy measurement function, Specially：It can the positive active energy of metering, reversed active energy, four-quadrant reactive energy；It can be formed according to the account day of setting Monthly clearing electric energy, for line loss analyzing.

4. integral intelligent looped network switch apparatus according to claim 1, it is characterised in that：The power quality analysis, Specially：Realize power quality index, voltage and current 2-50 subharmonic and waveform distortion, non-equilibrium among three phase voltages, voltage The monitoring of qualification rate, power factor (PF) and frequency departure.

5. integral intelligent looped network switch apparatus according to claim 1, it is characterised in that：The integral intelligent looped network Switchgear has communication interface；The communication interface includes：

One 100BASE-FX interface and master station communication channel, wavelength 1310nm, 155Mb/s, single mode；

Eight 10/100BASE-T interfaces, for accessing 8 monitoring and protection modules；

One GPRS wireless communication, selects 3G/4G to communicate；

Two road RS485 communication interfaces, 300~9600bps of traffic rate；

One RS232 local maintenance interface, communication speed 115200bps；

And a USB interface, quickly upgrade for software, system Fast-Maintenance.

6. integral intelligent looped network switch apparatus according to claim 1, it is characterised in that：It is described that mutual induction of voltage is installed AB, CB voltage between phases mutual inductor are installed for voltage measurement in the Master Control Room of device PT, while exchange input is provided for power module； Per special two subchannel and instrument box is set on cabinet, the communication between each unit uses Ethernet communication mode.