CN105634133A - Power supply and distribution monitoring system - Google Patents
Power supply and distribution monitoring system Download PDFInfo
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- CN105634133A CN105634133A CN201610084733.7A CN201610084733A CN105634133A CN 105634133 A CN105634133 A CN 105634133A CN 201610084733 A CN201610084733 A CN 201610084733A CN 105634133 A CN105634133 A CN 105634133A
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Abstract
The invention discloses a power supply and distribution monitoring system. The power supply and distribution monitoring system comprises an on-site monitoring sub system, a communication network and a monitoring center, wherein the on-site monitoring sub system is used for collecting analog quantities and switching values of on-site voltage-transformation equipment and power distribution equipment adapted with the voltage-transformation equipment, and transmitting the collected data to the monitoring centre through the communication network; and the monitoring center is used for receiving, and storing, making statistics, analyzing and processing the collected various data information, and issuing a control instruction through the communication network. According to the power supply and distribution monitoring system, the management efficiency and the power supply reliability of the system are improved; the required information for lowering electric energy cost, equipment investment cost and potential loss in equipment running is provided; the power supply and distribution monitoring system establishes the complete monitoring system for the voltage-transformation equipment and power distribution equipment by collecting, storing, making statistics, analyzing and processing the electric power parameters; an abnormal phenomenon can be found in time in the real-time monitoring process; and effective measures are adopted for equipment upgrading or compensation so as to avoid malfunction expansion and loss.
Description
Technical field
The present invention relates to field of power, particularly relate to a kind of monitoring surveillance system.
Background technology
Traditional power supply-distribution system, equipment and control simple, automaticity is low, it is necessary to being furnished with special messenger on duty and make an inspection tour, the needs that break down are searched along circuit, it is impossible to adapt to the needs of modern social economy high speed development.
Along with the development of distribution system, originally rely on artificial mode to be monitored and make an inspection tour not catching up with Developing process, but also there is inconvenience and defect, now urgently improved. In order to solve these problems, relevant manufactures there's no one who doesn't or isn't seeks solution painstakingly, but has no applicable design for a long time always, and this is clearly the anxious problem being intended to solve of relevant dealer.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, it is an object of the invention to, it is provided that a kind of monitoring surveillance system, including: on-site supervision subsystem, communication network and Surveillance center;
Described on-site supervision subsystem is used for the analog quantity of collection site potential device and the controller switching equipment suitable with potential device, including: transformator each side electric current, voltage, active power, reactive power, coil temperature, oil temperature; The electric current of supply line, active power, reactive power; The voltage of bus, frequency; The electric current of segmentation/mother; The three-phase voltage of supply line, three-phase current, residual voltage, zero-sequence current, and the switching value of collection site equipment, switching value includes: primary cut-out position, isolation switch, grounding switch position, 380V killer switch position, the direct current major loop position of the switch, protection act resultant signal; Substation accident resultant signal, on the spot/distant place switch positions, breaker operation mechanism abnormal signal, control loop template signal, protection alarm signal, protection plant failure signal, the abnormal signal of power supply unit, automaton abnormal signal, straight-flow system abnormal signal, fire alarm installation fault-signal, described on-site supervision subsystem by the above-mentioned data that gather by communication network transmission to Surveillance center;
Described communication network transmits to Surveillance center for the field data gathered by on-site supervision layer;
Described Surveillance center receives and the every data message gathered is stored, and statistics is analyzed, and processes and assigns control instruction by communication network.
Preferably, described on-site supervision subsystem includes: high voltage side of transformer current detection module, transformator medium voltage side current detection module, current filtering module;
Described high voltage side of transformer current detection module is used for detecting high voltage side of transformer three-phase current and high-pressure side zero-sequence current;
Described transformator medium voltage side current detection module is used for detecting transformator medium voltage side three-phase current and medium voltage side zero-sequence current;
The electric current gathered is filtered by described current filtering module;
Described Surveillance center includes: transformator zero-sequence current computing module, the differential determination module of transformator zero sequence, transformator zero sequence differential action module, residual voltage lock modules;
Described residual voltage lock modules is for when transformator generation earth fault, detecting residual voltage;
Described transformator zero-sequence current computing module is for according to the high voltage side of transformer three-phase current obtained and transformator medium voltage side three-phase current, passing through Iop.0=K1*I0G+K2*I0H, wherein, K1 takes 1 ~ 1.2, and K2 takes 1.1 ~ 1.3, obtains the zero-sequence current of transformator both sides; I0G is high-pressure side zero-sequence current, and I0H is medium voltage side zero-sequence current, and Iop.0 is high-pressure side benchmark zero-sequence current;
The described differential determination module of transformator zero sequence is used for determining whether to meet zero sequence differential protection condition, meets I when simultaneouslyopMore than Iop.0, Iop more than (0.6 ~ 0.9) * Izd, when described residual voltage lock modules detects residual voltage, transformator zero sequence differential action module starting transformer zero-sequenceprotection;
IopDifference current for zero sequence differential protection;
IzdFor differential protection ratio brake electric current.
Preferably, described Surveillance center includes: transformator stalling current computing module;
Described transformator stalling current computing module is for according to the high voltage side of transformer three-phase current obtained and transformator medium voltage side three-phase current, passing through Izd=K3*IG K4*IH, wherein, K3 takes 0.7 ~ 1.3, and K4 takes 0.6 ~ 1.2, obtains differential protection ratio brake electric current;
IG=max{ �� IAG ��, �� IBG ��, �� ICG �� },
Wherein IAG, IBG, ICG be high-pressure side three-phase current;
ID=max{ �� IAH ��, �� IBH ��, �� ICH �� },
Wherein
IAG, IBG, ICG be high-pressure side three-phase current;
IAH, IBH, ICH be medium voltage side three-phase current.
Preferably, described Surveillance center includes: IP coding module;
Described IP coding module is for setting the unique ip address of each monitoring monomer of on-site supervision subsystem;
Described on-site supervision subsystem includes: humidity sensor, transformer control unit,
Described humidity sensor is for monitoring in real time the humidity in substation, switchgear house;
Described transformer control unit is for carrying out monitor in real time to the running status of transformator in substation.
Preferably, described transformer control unit adopts camera head;
Described camera head includes: video acquiring module, video decomposing module, temperature induction module, video transmission module;
Described video acquiring module is for carrying out image taking in transformation room and switchgear house;
Described temperature induction module is for sensing the temperature of transformer temperature in transformation room and sensing the temperature of power distribution cabinet in switchgear house;
Described video decomposing module is for decomposing the video pictures of picked-up in the way of every frame;
Described video transmission module is for transmitting the temperature information that every two field picture and temperature induction module sense to Surveillance center;
Described Surveillance center includes: standard picture setting module, image comparison module, image composing unit, video reception module, temperature alarming module;
Described standard picture setting module is for setting the standard picture of transformation room and switchgear house;
The temperature information of described video reception module image and the sensing of temperature induction module for receiving video transmission module transmission;
Described image composing unit is for being combined forming the image in complete transformation room and switchgear house by the every two field picture received;
Described image comparison module is for the image in the transformation room that will receive and switchgear house, and corresponding and transformation room and switchgear house standard picture compares respectively, when the image information of the image information received with standard there are differences, sends information;
Described temperature alarming module is used for when the temperature information of temperature induction module sensing is beyond the temperature set, alert.
Preferably, described camera head includes: face recognition module;
Described Surveillance center includes: human body judge module;
Described face recognition module enters the face in transformation room or distribution indoor occupant for identifying, and is transferred to described Surveillance center by video transmission module;
Described human bioequivalence module is for the identification face information according to reception, and in conjunction with the temperature information of temperature induction module sensing human body, identification personnel enter transformation room or switchgear house.
Preferably, described Surveillance center includes: time setting module, human body judge alarm module;
Described time setting module is for setting the operation time period of electric power system, non-operating time section and repair time section;
Described human body judges that alarm module is for running in the time period in electric power system, and described human bioequivalence module identification personnel enter in transformation room or switchgear house, and described human body judges that alarm module sends safety alarm; In electric power system non-operating time section, described human bioequivalence module identification personnel enter in transformation room or switchgear house, and described human body judges that alarm module sends thief-proof alarm; In electric power system repair time section, monitor maintainer's upkeep operation.
Preferably, described video transmission module includes: data transmission unit, tranmitting data register, error checking and correction unit;
Described data transmission unit is for transmitted in parallel data under the driving of tranmitting data register, and the rising edge at clock sends bit 0 to bit 3, sends bit 4 to bit 7 at trailing edge, and each clock cycle completes the data of a byte and sends;
Described error checking and correction unit is for adding up to the eight parallel-by-bit outgoing data of often continuous 16 clock cycle, take low eight conduct verifications and the byte of cumulative sum, often the 17th clock cycle after continuous 16 clock cycle sends the cumulative reset signal of verification, and sends null byte at the 18th clock; The Frame video signal that described data transmission unit sends includes: Frame video signal, verification and byte, null byte.
Preferably, video reception module includes: data receipt unit, reception error verification unit;
Described data receipt unit is used for and under tranmitting data register same frequency, receives data parallel.
Described reception error verification unit is for exporting eight bit parallel data of each continuous 16 clock cycle as receiving data, the data accumulation of each continuous 16 clock cycle is sued for peace simultaneously obtain local computing verification and, the verification of local computing and the 8bit data with the 17th clock cycle received compare, when comparative result is identical, then the data being currently received are errorless; Otherwise data are wrong reports to upper layer module.
Preferably, described Surveillance center includes: run report generation module, peak valley statistical module;
Described operation report generation module is used for automatically generating operation record form on duty, relieve record form, Unit account of plant, relay protection constant value table, overhaul of the equipments log, load day, Month And Year form;
Described peak valley statistical module for by the hour, day, the moon, generate the electric energy statistics that peak valley is flat year, and carry out electric energy time-shared charge statistics according to peak, paddy, at ordinary times section.
As can be seen from the above technical solutions, the invention have the advantages that
Monitoring surveillance system improves the reliability of the efficiency of management and system power supply, it is provided that reduces electric energy cost, reduction capital equipment investment and equipment and runs the information needed for potential consumption.
Monitoring surveillance system is by the collection of parameters of electric power, storage, statistics, analyze, process the monitoring system establishing complete potential device and controller switching equipment, note abnormalities in time phenomenon in real-time supervision process, adopt an effective measure and carry out scrap build or compensation, to avoid failure propagation, it is to avoid loss.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, the accompanying drawing used required in describing will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the overall schematic of monitoring surveillance system;
Fig. 2 is the embodiment schematic diagram of monitoring surveillance system.
Detailed description of the invention
For making the goal of the invention of the present invention, feature, the advantage can be more obvious and understandable; specific embodiment and accompanying drawing will be used below; the technical scheme of present invention protection is clearly and completely described; obviously; the embodiments described below are only a part of embodiment of the present invention, and not all embodiment. Based on the embodiment in this patent, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this patent protection.
The present embodiment provides a kind of monitoring surveillance system, as it is shown in figure 1, include: on-site supervision subsystem 1, communication network 2 and Surveillance center 3;
On-site supervision subsystem 1 is used for the analog quantity of collection site potential device and the controller switching equipment suitable with potential device, including: transformator each side electric current, voltage, active power, reactive power, coil temperature, oil temperature; The electric current of supply line, active power, reactive power; The voltage of bus, frequency; The electric current of segmentation/mother; The three-phase voltage of supply line, three-phase current, residual voltage, zero-sequence current, and the switching value of collection site equipment, switching value includes: primary cut-out position, isolation switch, grounding switch position, 380V killer switch position, the direct current major loop position of the switch, protection act resultant signal; Substation accident resultant signal, on the spot/distant place switch positions, breaker operation mechanism abnormal signal, control loop template signal, protection alarm signal, protection plant failure signal, the abnormal signal of power supply unit, automaton abnormal signal, straight-flow system abnormal signal, fire alarm installation fault-signal, on-site supervision subsystem by the above-mentioned data that gather by communication network transmission to Surveillance center 3;
Communication network 2 transmits to Surveillance center 3 for the field data gathered by on-site supervision layer; Surveillance center 3 receives and the every data message gathered is stored, and statistics is analyzed, and processes and assigns control instruction by communication network.
The state that Surveillance center 3 occurs for electric power system can store, statistics, analyzes, and processes. When electric power system breaks down or during accident, it is possible to report to the police, the content of warning includes analog quantity off-limit alarm and on-off state displacement is reported to the police, and reports to the police and is divided into general alarm and accident alarming. General alarm includes analog quantity off-limit alarm, switching value anticipating signal is reported to the police and the fault alarm of Microcomputer Protection itself. Accident alarming refers to the protection act and the circuit breaker trip signal that are caused by accident; now; monitoring system is automatically released dependent picture and is shown; trip breaker in picture answers variable color, flicker; and send special alarm sound; alarm sound is energy hand-reset after operator confirms, alarm sound can send different sound according to different types of alarm signal.
Also having the electric current of electric power system, voltage out-of-limit, film flicker is pointed out, and the current more limit value of display shows corresponding content for events such as switch changed position, protection act, protection alarms in alarm frame alarm window. Surveillance center 3 can by the above-mentioned printable record of all events and write dish preserve.
In the present embodiment, as in figure 2 it is shown, Surveillance center 3 includes: IP coding module;
IP coding module is for setting the unique ip address of each monitoring monomer of on-site supervision subsystem; IP address can identify system accurately and upload the source of data, due to the uniqueness of monitoring monomer IP address in monitoring grid, thus ensure that safety, the reliability that packet transmits at grid.
On-site supervision subsystem 1 includes: humidity sensor, transformer control unit, and humidity sensor is for monitoring in real time the humiture in substation, switchgear house; Transformer control unit is for carrying out monitor in real time to the running status of transformator in substation.
In the present embodiment, transformer control unit adopts camera head; Camera head includes: video acquiring module 11, video decomposing module 12, temperature induction module 13, video transmission module 14;
Video acquiring module 11 is for carrying out image taking in transformation room and switchgear house;
Temperature induction module 13 is for sensing the temperature of transformer temperature in transformation room and sensing the temperature of power distribution cabinet in switchgear house; Video decomposing module 12 is for decomposing the video pictures of picked-up in the way of every frame; Video transmission module 14 transmits to Surveillance center for the temperature information every two field picture and temperature induction module 13 sensed;
Surveillance center 3 includes: standard picture setting module 32, image comparison module 33, image composing unit 34, video reception module 31, temperature alarming module 35;
Standard picture setting module 32 is for setting the standard picture of transformation room and switchgear house;
The temperature information of the video reception module 31 image and temperature induction module 13 sensing for receiving video transmission module 14 transmission;
Image composing unit 34 is for being undertaken synthesizing the image in complete transformation room and switchgear house by the every two field picture received;
Image comparison module 33 is for the image in the transformation room that will receive and switchgear house, and compares with the standard picture in transformation room and switchgear house respectively, when the image information of the image information received with standard there are differences, sends information;
Temperature alarming module 35 is used for when the temperature information of temperature induction module sensing is beyond the temperature set, alert.
By the image obtained in transformation room and switchgear house and be uploaded to Surveillance center, the image comparison module 33 of Surveillance center is by the image in the transformation room received and switchgear house, and compare with the standard picture in transformation room and switchgear house respectively, when the image information of the image information received with standard there are differences, send information; Surveillance center is so made to understand the information of transformation room and switchgear house in real time, it is ensured that power supply unit properly functioning.
In the present embodiment, camera head includes: face recognition module 15;
Surveillance center includes: human bioequivalence module 36; Face recognition module 15 enters the face in transformation room or distribution indoor occupant for identifying, and is transferred to Surveillance center 3 by video transmission module 14; Human bioequivalence module 36 is for according to the identification face information received, and senses the temperature information of human body in conjunction with temperature induction module 13, and identification personnel enter transformation room or switchgear house. Surveillance center monitor in real time personnel can enter transformation room and switchgear house.
In the present embodiment, Surveillance center 3 includes: time setting module 38, human body judge alarm module 37;
Time setting module 38 is for setting the operation time period of electric power system, non-operating time section and repair time section;
Human body judges that alarm module 37 is for running in the time period in electric power system, and human bioequivalence module identification personnel enter in transformation room or switchgear house, and human body judges that alarm module 37 sends safety alarm; In electric power system non-operating time section, human bioequivalence module 36 identifies that personnel enter in transformation room or switchgear house, and human body judges that alarm module 37 sends thief-proof alarm; In electric power system repair time section, monitor maintainer's upkeep operation.
Run in the time period in electric power system, after personnel enter transformation room or switchgear house, safety alarm can be sent, it is prevented that Danger Electric shock risk occurs personnel. In electric power system non-operating time section, it is prevented that transformation room or switchgear house are stolen by some personnel, make the situation in Surveillance center's monitor in real time transformation room or switchgear house. In electric power system repair time section, monitoring maintainer's upkeep operation, prevent maintainer from security incident occurring, and after being switched to the operation time by the repair time, do not withdraw if any also having maintainer in transformation room or switchgear house, human body judges that alarm module 37 sends alarm, and prompting maintainer withdraws.
In the present embodiment, video transmission module includes: data transmission unit, tranmitting data register, error checking and correction unit;
Data transmission unit is for transmitted in parallel data under the driving of tranmitting data register, and the rising edge at clock sends bit 0 to bit 3, sends bit 4 to bit 7 at trailing edge, and each clock cycle completes the data of a byte and sends;
Error checking and correction unit is for adding up to the eight parallel-by-bit outgoing data of often continuous 16 clock cycle, take low eight conduct verifications and the byte of cumulative sum, often the 17th clock cycle after continuous 16 clock cycle sends the cumulative reset signal of verification, and sends null byte at the 18th clock; The Frame video signal that data transmission unit sends includes: Frame video signal, verification and byte, null byte.
Video reception module includes: data receipt unit, reception error verification unit;
Data receipt unit is used for and under tranmitting data register same frequency, receives data parallel.
Reception error verification unit is for exporting eight bit parallel data of each continuous 16 clock cycle as receiving data, the data accumulation of each continuous 16 clock cycle is sued for peace simultaneously obtain local computing verification and, the verification of local computing and the 8bit data with the 17th clock cycle received compare, when comparative result is identical, then the data being currently received are errorless; Otherwise data are wrong reports to upper layer module. This ensure that the accuracy of transformation room and switchgear house transmission of video images and accuracy, it is prevented that the external signal impact on transformation room and switchgear house transmission of video images.
In the present embodiment, Surveillance center 3 includes: run report generation module, peak valley statistical module;
Operation report generation module is used for automatically generating operation record form on duty, relieve record form, Unit account of plant, relay protection constant value table, overhaul of the equipments log, load day, Month And Year form;
Peak valley statistical module for by the hour, day, the moon, generate the electric energy statistics that peak valley is flat year, and carry out electric energy time-shared charge statistics according to peak, paddy, at ordinary times section.
In order to further to the protection of visual plant in electric power system and monitoring, in the present embodiment, on-site supervision subsystem 1 includes: high voltage side of transformer current detection module, transformator medium voltage side current detection module, current filtering module;
High voltage side of transformer current detection module is used for detecting high voltage side of transformer three-phase current and high-pressure side zero-sequence current;
Transformator medium voltage side current detection module is used for detecting transformator medium voltage side three-phase current and medium voltage side zero-sequence current;
The electric current gathered is filtered by current filtering module;
Surveillance center includes: transformator zero-sequence current computing module, the differential determination module of transformator zero sequence, transformator zero sequence differential action module, residual voltage lock modules;
Residual voltage lock modules is for when transformator generation earth fault, detecting residual voltage;
When zero-sequence current by three-phase current self-produced time, if it occur that TA broken string, it may appear that the self-produced zero-sequence current of " falseness ", it is possible to cause zero sequence overcurrent element malfunction, so the optional residual voltage locking of this protection. When transformator generation earth fault, except producing zero-sequence current, residual voltage also occurs, but during TA broken string, although three-phase current self-produced can leaching to zero-sequence current, but without residual voltage generation. So residual voltage locking is possible to prevent the malfunction because TA broken string causes.
Transformator zero-sequence current computing module is for according to the high voltage side of transformer three-phase current obtained and transformator medium voltage side three-phase current, passing through Iop.0=K1*I0G+K2*I0H, wherein, K1 takes 1 ~ 1.2, and K2 takes 1.1 ~ 1.3, obtains the zero-sequence current of transformator both sides; I0G is high-pressure side zero-sequence current, and I0H is medium voltage side zero-sequence current, and Iop.0 is high-pressure side benchmark zero-sequence current;
The differential determination module of transformator zero sequence is used for determining whether to meet zero sequence differential protection condition, meets I when simultaneouslyopMore than Iop.0, Iop more than (0.6 ~ 0.9) * Izd, when residual voltage lock modules detects residual voltage, transformator zero sequence differential action module starting transformer zero-sequenceprotection;
IopDifference current for zero sequence differential protection;
IzdFor differential protection stalling current.
Wherein, Surveillance center includes: transformator stalling current computing module;
Transformator stalling current computing module is for according to the high voltage side of transformer three-phase current obtained and transformator medium voltage side three-phase current, passing through Izd=K3*IG K4*IH, wherein, K3 takes 0.7 ~ 1.3, and K4 takes 0.6 ~ 1.2, obtains differential protection stalling current;
IG=max{ �� IAG ��, �� IBG ��, �� ICG �� },
Wherein IAG, IBG, ICG be high-pressure side three-phase current;
ID=max{ �� IAH ��, �� IBH ��, �� ICH �� },
Wherein
IAG, IBG, ICG be high-pressure side three-phase current;
IAH, IBH, ICH be medium voltage side three-phase current.
Monitoring surveillance system has zero-sequence current protection; the sensitivity of inside transformer short circuit can be improved; sensitivity not foot phenomenon and the excitation surge current of avoiding the existence in reflection earth fault of tradition longitudinal difference protection apply the variety of problems brought, the problem solving original zero-sequenceprotection tripping to longitudinal difference protection. The general brake electric current that two winding transformer and autotransformer are all suitable for that zero-sequenceprotection is not affected by transformer operation manners chooses mode. Avoid alternate error protection malfunction outside district, improve the reliability of protection,
In this specification, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, identical similar portion reference mutually between each embodiment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments. Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. a monitoring surveillance system, it is characterised in that including: on-site supervision subsystem, communication network and Surveillance center;
Described on-site supervision subsystem is used for the analog quantity of collection site potential device and the controller switching equipment suitable with potential device, including: transformator each side electric current, voltage, active power, reactive power, coil temperature, oil temperature; The electric current of supply line, active power, reactive power; The voltage of bus, frequency; The electric current of segmentation/mother; The three-phase voltage of supply line, three-phase current, residual voltage, zero-sequence current, and the switching value of collection site equipment, switching value includes: primary cut-out position, isolation switch, grounding switch position, 380V killer switch position, the direct current major loop position of the switch, protection act resultant signal; Substation accident resultant signal, on the spot/distant place switch positions, breaker operation mechanism abnormal signal, control loop template signal, protection alarm signal, protection plant failure signal, the abnormal signal of power supply unit, automaton abnormal signal, straight-flow system abnormal signal, fire alarm installation fault-signal, described on-site supervision subsystem by the above-mentioned data that gather by communication network transmission to Surveillance center;
Described communication network transmits to Surveillance center for the field data gathered by on-site supervision layer;
Described Surveillance center receives and the every data message gathered is stored, and statistics is analyzed, and processes and assigns control instruction by communication network.
2. monitoring surveillance system according to claim 1, it is characterised in that
Described on-site supervision subsystem includes: high voltage side of transformer current detection module, transformator medium voltage side current detection module, current filtering module;
Described high voltage side of transformer current detection module is used for detecting high voltage side of transformer three-phase current and high-pressure side zero-sequence current;
Described transformator medium voltage side current detection module is used for detecting transformator medium voltage side three-phase current and medium voltage side zero-sequence current;
The electric current gathered is filtered by described current filtering module;
Described Surveillance center includes: transformator zero-sequence current computing module, the differential determination module of transformator zero sequence, transformator zero sequence differential action module, residual voltage lock modules;
Described residual voltage lock modules is for when transformator generation earth fault, detecting residual voltage;
Described transformator zero-sequence current computing module is for according to the high voltage side of transformer three-phase current obtained and transformator medium voltage side three-phase current, passing through Iop.0=K1*I0G+K2*I0H, wherein, K1 takes 1 ~ 1.2, and K2 takes 1.1 ~ 1.3, obtains the zero-sequence current of transformator both sides; I0G is high-pressure side zero-sequence current, and I0H is medium voltage side zero-sequence current, and Iop.0 is high-pressure side benchmark zero-sequence current;
The described differential determination module of transformator zero sequence is used for determining whether to meet zero sequence differential protection condition, meets I when simultaneouslyopMore than Iop.0, Iop more than (0.6 ~ 0.9) * Izd, when described residual voltage lock modules detects residual voltage, transformator zero sequence differential action module starting transformer zero-sequenceprotection;
IopDifference current for zero sequence differential protection;
IzdFor differential protection ratio brake electric current.
3. monitoring surveillance system according to claim 2, it is characterised in that
Described Surveillance center includes: transformator stalling current computing module;
Described transformator stalling current computing module is for according to the high voltage side of transformer three-phase current obtained and transformator medium voltage side three-phase current, passing through Izd=K3*IG-K4*IH, wherein, K3 takes 0.7 ~ 1.3, and K4 takes 0.6 ~ 1.2, obtains differential protection ratio brake electric current;
IG=max{ �� IAG ��, �� IBG ��, �� ICG �� },
Wherein IAG, IBG, ICG be high-pressure side three-phase current;
ID=max{ �� IAH ��, �� IBH ��, �� ICH �� },
Wherein
IAG, IBG, ICG be high-pressure side three-phase current;
IAH, IBH, ICH be medium voltage side three-phase current.
4. monitoring surveillance system according to claim 1, it is characterised in that
Described Surveillance center includes: IP coding module;
Described IP coding module is for setting the unique ip address of each monitoring monomer of on-site supervision subsystem;
Described on-site supervision subsystem includes: humidity sensor, transformer control unit,
Described humidity sensor is for monitoring in real time the humidity in substation, switchgear house;
Described transformer control unit is for carrying out monitor in real time to the running status of transformator in substation.
5. monitoring surveillance system according to claim 4, it is characterised in that
Described transformer control unit adopts camera head;
Described camera head includes: video acquiring module, video decomposing module, temperature induction module, video transmission module;
Described video acquiring module is for carrying out image taking in transformation room and switchgear house;
Described temperature induction module is for sensing the temperature of transformer temperature in transformation room and sensing the temperature of power distribution cabinet in switchgear house;
Described video decomposing module is for decomposing the video pictures of picked-up in the way of every frame;
Described video transmission module is for transmitting the temperature information that every two field picture and temperature induction module sense to Surveillance center;
Described Surveillance center includes: standard picture setting module, image comparison module, image composing unit, video reception module, temperature alarming module;
Described standard picture setting module is for setting the standard picture of transformation room and switchgear house;
The temperature information of described video reception module image and the sensing of temperature induction module for receiving video transmission module transmission;
Described image composing unit is for being combined forming the image in complete transformation room and switchgear house by the every two field picture received;
Described image comparison module is for the image in the transformation room that will receive and switchgear house, and corresponding and transformation room and switchgear house standard picture compares respectively, when the image information of the image information received with standard there are differences, sends information;
Described temperature alarming module is used for when the temperature information of temperature induction module sensing is beyond the temperature set, alert.
6. monitoring surveillance system according to claim 5, it is characterised in that
Described camera head includes: face recognition module;
Described Surveillance center includes: human body judge module;
Described face recognition module enters the face in transformation room or distribution indoor occupant for identifying, and is transferred to described Surveillance center by video transmission module;
Described human bioequivalence module is for the identification face information according to reception, and in conjunction with the temperature information of temperature induction module sensing human body, identification personnel enter transformation room or switchgear house.
7. monitoring surveillance system according to claim 6, it is characterised in that
Described Surveillance center includes: time setting module, human body judge alarm module;
Described time setting module is for setting the operation time period of electric power system, non-operating time section and repair time section;
Described human body judges that alarm module is for running in the time period in electric power system, and described human bioequivalence module identification personnel enter in transformation room or switchgear house, and described human body judges that alarm module sends safety alarm; In electric power system non-operating time section, described human bioequivalence module identification personnel enter in transformation room or switchgear house, and described human body judges that alarm module sends thief-proof alarm; In electric power system repair time section, monitor maintainer's upkeep operation.
8. monitoring surveillance system according to claim 5, it is characterised in that
Described video transmission module includes: data transmission unit, tranmitting data register, error checking and correction unit;
Described data transmission unit is for transmitted in parallel data under the driving of tranmitting data register, and the rising edge at clock sends bit 0 to bit 3, sends bit 4 to bit 7 at trailing edge, and each clock cycle completes the data of a byte and sends;
Described error checking and correction unit is for adding up to the eight parallel-by-bit outgoing data of often continuous 16 clock cycle, take low eight conduct verifications and the byte of cumulative sum, often the 17th clock cycle after continuous 16 clock cycle sends the cumulative reset signal of verification, and sends null byte at the 18th clock; The Frame video signal that described data transmission unit sends includes: Frame video signal, verification and byte, null byte.
9. monitoring surveillance system according to claim 8, it is characterised in that
Video reception module includes: data receipt unit, reception error verification unit;
Described data receipt unit is used for and under tranmitting data register same frequency, receives data parallel;
Described reception error verification unit is for exporting eight bit parallel data of each continuous 16 clock cycle as receiving data, the data accumulation of each continuous 16 clock cycle is sued for peace simultaneously obtain local computing verification and, the verification of local computing and the 8bit data with the 17th clock cycle received compare, when comparative result is identical, then the data being currently received are errorless; Otherwise data are wrong reports to upper layer module.
10. monitoring surveillance system according to claim 1, it is characterised in that
Described Surveillance center includes: run report generation module, peak valley statistical module;
Described operation report generation module is used for automatically generating operation record form on duty, relieve record form, Unit account of plant, relay protection constant value table, overhaul of the equipments log, load day, Month And Year form;
Described peak valley statistical module for by the hour, day, the moon, generate the electric energy statistics that peak valley is flat year, and carry out electric energy time-shared charge statistics according to peak, paddy, at ordinary times section.
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