CN102623994B - Substation area control method and system of microgrid operation mode - Google Patents

Substation area control method and system of microgrid operation mode Download PDF

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Publication number
CN102623994B
CN102623994B CN201210124399.5A CN201210124399A CN102623994B CN 102623994 B CN102623994 B CN 102623994B CN 201210124399 A CN201210124399 A CN 201210124399A CN 102623994 B CN102623994 B CN 102623994B
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power supply
operational mode
electricity generation
merging
electricity
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CN102623994A (en
Inventor
邹国惠
翁奕珊
孙玉彤
胡云花
罗奕飞
张桂娟
何文吉
鲁明佳
代卫星
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Zhuhai Electric Power Design Institute Co., Ltd.
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ZHUHAI ELECTRIC POWER DESIGN INSTITUTE CO LTD
Zhuhai Power Supply Bureau Of Guangdong Power Grid Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/14District level solutions, i.e. local energy networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

Abstract

The invention relates to a substation area control method and system of a microgrid operation mode. The substation area control method comprises the following steps of: when a power generation system is subjected to grid-connected power generation according to a first operation mode, if an island operation state appears and a grid-connected power generation mode exits, judging whether the low voltage side of a transformer for a substation corresponding to a second operation mode of the power generation system has voltage, judging which state automatic throw-in equipment of emergency power supply is; if the low voltage side has voltage and is in a commissioning state, receiving correct action formation of the automatic throw-in equipment of emergency power supply and starting the second operation mode; and if the low voltage side does not have voltage or the automatic throw-in equipment of emergency power supply is in an exit state, or the correct action information of the automatic throw-in equipment of emergency power supply is not received within preset time, locking the automatic throw-in equipment of emergency power supply and then starting the microgrid operation mode. According to the substation area control method and system, concentrated judgment and computation are carried out by acquiring real-time operation information of parts in the substation transformer area, which are related to the power generation system, and effective control based on the substation-grid microgrid operation mode is achieved.

Description

Territory, station control method and the system of microgrid operational mode
Technical field
The present invention relates to power technology field, particularly a kind of territory, station control method and system of micro-power system operating mode.
Background technology
Power supply in micro-electrical network is called as micro-source, and micro-electrical network can be incorporated into the power networks or islet operation with electric power system.No matter which kind of operational mode, all needs micro-source effectively to control, and maintains the stable of system voltage and frequency.While being incorporated into the power networks, provide voltage support by electric power system, each micro-source adopts output power pattern, and micro-source is taken as a schedulable controllable current source.When islet operation, require each micro-source can follow load variations automatic power adjustment output, meet output voltage and frequency changes within allowed band simultaneously, this requires micro-source to have certain generate output deposit.Due to the uncontrollable load capacity of control technology of the micro-electrical network of tradition, if when therefore load capacity is greater than micro-source capacity when islet operation, the intrasystem micro-source of islet operation will be forced to out of service, cannot guarantee the continuous reliability service of microgrid under island mode.
Between the tradition pattern that is incorporated into the power networks of micro-electrical network and islet operation pattern, change, by judging that local parameter realizes, between device, cannot realize easily information sharing, automaticity is lower.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of prior art, a kind of territory, station control method and system of micro-power system operating mode are provided, by gathering in transformer station region and electricity generation system relevant portion real time execution information, concentrate judgement, computing, conversion automatically between the pattern that is incorporated into the power networks of micro-electrical network of realization based on station level and lonely network operation pattern.
Object of the present invention is achieved through the following technical solutions:
Territory, a station control method for micro-power system operating mode, comprises step:
In the time that electricity generation system is generated electricity by way of merging two or more grid systems according to the first operational mode, there is islet operation state if receive and by the circuit breaker at tripping electricity generation system networking place, electricity generation system is exited to the information of the pattern of generating electricity by way of merging two or more grid systems, whether station low pressure side corresponding to the second operational mode that judges electricity generation system has voltage, and judges that automatic throw-in equipment of emergency power supply is in the state of putting into operation or exit status;
If it is at the state of putting into operation that there are voltage and automatic throw-in equipment of emergency power supply in station corresponding to the second operational mode of electricity generation system by low pressure side, in the pattern of generating electricity by way of merging two or more grid systems receiving under the second operational mode that starts electricity generation system after automatic throw-in equipment of emergency power supply correct operation information;
If station corresponding to the second operational mode of electricity generation system is in exit status with low pressure side no-voltage or automatic throw-in equipment of emergency power supply, or in Preset Time, do not receive the information of automatic throw-in equipment of emergency power supply correct operation, after locking automatic throw-in equipment of emergency power supply, start microgrid operational mode;
Wherein, described electricity generation system comprises two loops that generate electricity by way of merging two or more grid systems, if generating electricity by way of merging two or more grid systems by described two loops that generate electricity by way of merging two or more grid systems that generate electricity by way of merging two or more grid systems in loop is the first operational mode, generating electricity by way of merging two or more grid systems by two another loops that generate electricity by way of merging two or more grid systems, loop that generate electricity by way of merging two or more grid systems is the second operational mode.
Territory, a station control system for micro-power system operating mode, comprising:
The first control module, for generating electricity by way of merging two or more grid systems according to the first operational mode when electricity generation system, there is islet operation state if receive and receive by the circuit breaker at tripping electricity generation system networking place, electricity generation system being exited after the information of the pattern of generating electricity by way of merging two or more grid systems, judge whether station corresponding to the second operational mode low pressure side has voltage:
The second control module, for when station corresponding to the second operational mode have voltage by low pressure side and receive automatic throw-in equipment of emergency power supply input state information time, judge in Preset Time automatic throw-in equipment of emergency power supply whether correct operation double power supply converting switch is switched to the information of the second place by primary importance, also for working as the information of automatic throw-in equipment of emergency power supply in exit status that receives, or station corresponding to the second operational mode low pressure side no-voltage of electricity generation system, or do not receive in the given time automatic throw-in equipment of emergency power supply action double power supply converting switch be switched to by primary importance the information of the second place, locking automatic throw-in equipment of emergency power supply,
The 3rd control module, for double power supply converting switch being switched to by primary importance after the information of the second place when automatic throw-in equipment of emergency power supply correct operation, the second operational mode that starts electricity generation system is generated electricity by way of merging two or more grid systems, after the second control module locking automatic throw-in equipment of emergency power supply, start microgrid operational mode;
Wherein, described electricity generation system comprises two loops that generate electricity by way of merging two or more grid systems, if generating electricity by way of merging two or more grid systems by described two loops that generate electricity by way of merging two or more grid systems that generate electricity by way of merging two or more grid systems in loop is the first operational mode, generating electricity by way of merging two or more grid systems by two another loops that generate electricity by way of merging two or more grid systems, loop that generate electricity by way of merging two or more grid systems is the second operational mode, primary importance by described double power supply converting switch corresponding to the first operational mode in place, the second place by the double power supply converting switch described in the second operational mode correspondence in place.
According to the scheme of the invention described above, after electricity generation system is generated electricity by way of merging two or more grid systems, may make electricity generation system enter the situation of islet operation state as appearance time, whether the station low pressure side that first judgement does not connect electricity generation system has voltage (be that the first operational mode occurs islet operation state while generating electricity by way of merging two or more grid systems as current, judge whether the station low pressure side of corresponding the second operational mode has voltage).If there is voltage, then after automatic throw-in equipment of emergency power supply action, can recovers electricity generation system and be incorporated into the power networks, generate electricity by way of merging two or more grid systems with the second operational mode, if there is no voltage, after locking automatic throw-in equipment of emergency power supply, restart microgrid operational mode.The present invention has automatically proposed effective solution by micro-electrical network to important load power supply in the situation that system large power supply all loses, and does not affect the quality of power supply of electrical network, uses the method design, construction, the each link of operation maintenance all can facilitate to such an extent that realize.
Accompanying drawing explanation
Fig. 1 is territory, the station control method flow chart of micro-power system operating mode of the embodiment of the present invention;
Fig. 2 is territory, the station control system structural representation of micro-power system operating mode of the embodiment of the present invention;
Fig. 3 is the relevant device artwork that the territory, station of the micro-power system operating mode in of the present invention one concrete example is controlled.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail, but embodiments of the present invention are not limited to this.
Embodiment
The present invention be in Network Based and IEC61850 standard acquisition transformer station region with grid-connected system relevant portion real time execution information, concentrate judgement, computing, realize between the pattern that is incorporated into the power networks based on standing grade and microgrid operational mode and automatically changing.
Shown in Figure 1, be territory, the station control method flow chart of micro-power system operating mode of the embodiment of the present invention.As shown in Figure 1, territory, the station control method of the micro-power system operating mode in this embodiment comprises:
Step S101: in the time that electricity generation system is generated electricity by way of merging two or more grid systems according to the first operational mode, there is islet operation state if receive and receive the information that by the circuit breaker at tripping electricity generation system networking place, electricity generation system is exited to the pattern of generating electricity by way of merging two or more grid systems, whether station low pressure side corresponding to the second operational mode that judges electricity generation system has voltage, and judge that automatic throw-in equipment of emergency power supply is in the state of putting into operation or exit status, if it is at the state of putting into operation that there are voltage and automatic throw-in equipment of emergency power supply in station corresponding to the second operational mode of electricity generation system by low pressure side, enter step S102, if station corresponding to the second operational mode of electricity generation system is at the state of putting into operation with low pressure side no-voltage or automatic throw-in equipment of emergency power supply, enter step S103, wherein, the information that occurs islet operation state is generally that some electricity generation system relevant portion real time execution information that the island protect device in transformer station region collects by it judge and obtain, and the first operational mode, the second operational mode is generally distinguished according to current operation of power networks state, if current electricity generation system is main power supply work, operational mode corresponding main power supply is called to the first operational mode, and operational mode corresponding to stand-by power supply is called the second operational mode, if current electricity generation system is stand-by power supply work, operational mode corresponding stand-by power supply is called to the first operational mode, and operational mode corresponding to main power supply is called the second operational mode, electricity generation system comprises grid-connected photovoltaic system, wind generator system etc.,
Step S102: in the pattern of generating electricity by way of merging two or more grid systems receiving under the second operational mode that starts electricity generation system after automatic throw-in equipment of emergency power supply action message, if do not receive in Preset Time after the information of automatic throw-in equipment of emergency power supply correct operation, enter step S103; Wherein, be generally to start and be incorporated into the power networks after pattern by the controller in electricity generation system, electricity generation system is generated electricity by way of merging two or more grid systems with the second operational mode;
Step S103: starting microgrid operational mode after locking automatic throw-in equipment of emergency power supply, wherein, is generally to transfer microgrid operational mode by the controller in electricity generation system to by the pattern of generating electricity by way of merging two or more grid systems.
According to the scheme of the invention described above, after electricity generation system is generated electricity by way of merging two or more grid systems, may make electricity generation system enter the situation of islet operation state as appearance time, whether the station low pressure side that first judgement does not connect electricity generation system has voltage (be that the first operation mould occurs islet operation state while generating electricity by way of merging two or more grid systems as current, judge whether the station low pressure side of corresponding the second operational mode has voltage).If there is voltage, then after automatic throw-in equipment of emergency power supply action, can recovers electricity generation system and be incorporated into the power networks, generate electricity by way of merging two or more grid systems with the second operational mode, if there is no voltage, after locking automatic throw-in equipment of emergency power supply, restart microgrid operational mode.The present invention has automatically proposed effective solution by micro-electrical network to important load power supply in the situation that system large power supply loses, and does not affect the quality of power supply of electrical network, uses the method design, construction, the each link of operation maintenance all can facilitate to such an extent that realize.
In an embodiment, step S102 can specifically comprise the steps: therein
Step S1021: receive the information of automatic throw-in equipment of emergency power supply at the state of input, and receiving in the given time automatic throw-in equipment of emergency power supply action is switched to double power supply converting switch after the information of the second place by primary importance, the circuit breaker at the electricity generation system of closing networking place, enters step S1022; Wherein, can pass through GOOSE (Generic Object Oriented Substation Event, general substation event) Network Capture is to whether correct operation double power supply converting switch is switched to the information of the second place by primary importance of automatic throw-in equipment of emergency power supply, then or this information after close electricity generation system networking place circuit breaker and receive this circuit breaker information of having closed;
Step S1022: enable the pattern of generating electricity by way of merging two or more grid systems, electricity generation system is generated electricity by way of merging two or more grid systems with the second operational mode.
In an embodiment, step S103 can specifically comprise the steps: therein
Step S1031: when receiving the information of automatic throw-in equipment of emergency power supply in exit status, or the low pressure side no-voltage information for station that the second operational mode that receives electricity generation system is corresponding, or do not receive in the given time automatic throw-in equipment of emergency power supply action double power supply converting switch be switched to by primary importance the information of the second place, station by corresponding the first operational mode in tripping electricity generation system effectively isolates electricity generation system and electrical network with becoming on high-tension side circuit breaker, enters step S1032;
Step S1032: locking automatic throw-in equipment of emergency power supply, be less than the generate output of electricity generation system with control area load by excising general load breaker simultaneously, enter step S1033, wherein, general load is definite according to actual conditions, and excising general load breaker is the demand that meets important load in order to make load be less than the generate output of electricity generation system;
Step S1033: switching to microgrid operational mode by the pattern of generating electricity by way of merging two or more grid systems, wherein, is generally to transfer microgrid operational mode by the controller in electricity generation system to by the pattern of generating electricity by way of merging two or more grid systems.
In addition, electricity generation system is in the time adopting the first operational mode or the second operational mode to generate electricity by way of merging two or more grid systems, if there is the islet operation state causing due to electric power system large-area power-cuts, generally that the change in location that circuit breaker does not all appear in the circuit breaker relevant to electricity generation system (had not both had circuit breaker to become a point position from co-bit, there is no circuit breaker from point position while becoming co-bit yet), in situation, understand like this circuit breaker at first tripping electricity generation system networking place; After default time delay, before tripping electric power system large-area power-cuts, in the operational mode of correspondence, stand with becoming high-pressure side circuit breaker; Excise general load breaker again and be less than after the generate output of electricity generation system with control area load, the circuit breaker at the electricity generation system of closing networking place, finally enables microgrid operational mode.
On the other hand; in the time receiving the information of the islet operation state that trip protection or hand trip(ping) cause; locking microgrid operational mode; when drop into again grid-connected system and need operations staff's manual confirmation; the information of the islet operation state that wherein, trip protection or hand trip(ping) cause is generally by GOOSE Internet Transmission.
Embodiment 2
According to territory, the station control method of micro-power system operating mode of the invention described above, the present invention also provides a kind of territory, station control system of micro-power system operating mode, territory, the station control system of micro-power system operating mode of the present embodiment is in Network Based and IEC61850 standard acquisition transformer station region and grid-connected system relevant portion real time execution information, concentrate judgement, computing, realize between the pattern that is incorporated into the power networks based on station level and microgrid operational mode and automatically changing.The embodiment controlling with regard to the territory, station of microgrid operational mode of the present invention is below elaborated.
The structural representation of territory, the station control system of micro-power system operating mode of the embodiment of the present invention has been shown in Fig. 2, and it comprises the first control module 201, the second control module 202, the 3rd control module 203, wherein:
The first control module 201, for generating electricity by way of merging two or more grid systems according to the first operational mode when electricity generation system, there is islet operation state if receive and receive the circuit breaker by tripping electricity generation system networking place electricity generation system being exited after the information of the pattern of generating electricity by way of merging two or more grid systems, judge whether station corresponding to the second operational mode low pressure side has voltage, and judge that automatic throw-in equipment of emergency power supply is in the state of putting into operation or exit status, wherein, the information that occurs islet operation state is generally that some electricity generation system relevant portion real time execution information that the island protect device in transformer station region collects by it judge and obtain, and the first operational mode, the second operational mode is distinguished according to current operation of power networks state, if current electricity generation system is main power supply work, operational mode corresponding main power supply is called to the first operational mode, and operational mode corresponding to stand-by power supply is called the second operational mode, if current electricity generation system is stand-by power supply work, operational mode corresponding stand-by power supply is called to the first operational mode, and operational mode corresponding to main power supply is called the second operational mode, electricity generation system comprises grid-connected photovoltaic system, wind generator system etc., the first control module 201 is connected with automatic throw-in equipment of emergency power supply, the state information of Real-time Collection automatic throw-in equipment of emergency power supply and action message,
The second control module 202, for when station corresponding to the second operational mode have voltage by low pressure side and receive automatic throw-in equipment of emergency power supply input state information time, judge in Preset Time automatic throw-in equipment of emergency power supply whether correct operation double power supply converting switch is switched to the information of the second place by primary importance, also for working as the information of automatic throw-in equipment of emergency power supply in exit status that receives, or station corresponding to the second operational mode low pressure side no-voltage of electricity generation system, or do not receive in the given time automatic throw-in equipment of emergency power supply action double power supply converting switch be switched to by primary importance the information of the second place, locking automatic throw-in equipment of emergency power supply,
The 3rd control module 203, for double power supply converting switch being switched to by primary importance after the information of the second place when automatic throw-in equipment of emergency power supply correct operation, the second operational mode that starts electricity generation system is generated electricity by way of merging two or more grid systems, after the second control module locking automatic throw-in equipment of emergency power supply, start microgrid operational mode.
According to the scheme of the invention described above, the first control module 201 receives and occurs islet operation state and receive occurring that the circuit breaker at islet operation state and the networking of tripping electricity generation system place exits electricity generation system after the information of the pattern of generating electricity by way of merging two or more grid systems, judge whether station corresponding to the second operational mode low pressure side has voltage, and judge that automatic throw-in equipment of emergency power supply is in the state of putting into operation or exit status; And according to different judged results, start different power generation modes by the 3rd control module 203.The present invention has automatically proposed effective solution by micro-electrical network to important load power supply in the situation that system large power supply all loses, and does not affect the quality of power supply of electrical network, uses the method design, construction, the each link of operation maintenance all can facilitate to such an extent that realize.
Introducing in detail in station low pressure side is below while having voltage, two kinds of situations of no-voltage, the function situation of each control module.
Therein in an embodiment, in the time that station has voltage and automatic throw-in equipment of emergency power supply at the state of input by low pressure side, the first control module 201 sends the first operational order to the second control module 202, and for receiving the second control module 202 and complete the information of the first operation task, after the circuit breaker at the electricity generation system of closing networking place, send the first switching command to the 3rd control module 203; The second control module 202 is receiving the first operational order, and in Preset Time, receive automatic throw-in equipment of emergency power supply correct operation and double power supply converting switch is switched to by primary importance after the information of the second place, be sent completely the information of the first operation task to the first control module 201; The second control module 202 is receiving the first operational order, and in Preset Time, receive automatic throw-in equipment of emergency power supply correct operation and double power supply converting switch is switched to by primary importance after the information of the second place, be sent completely the information of the first operation task to the first control module 201; Wherein, between each control module, the transmission of message (comprising that operational order, task complete information, switching command etc.) generally completes by GOOSE network.
Therein in an embodiment, the first control module 201 is also for controlling the on high-tension side circuit breaker of station change of electricity generation system, in the time receiving the information of automatic throw-in equipment of emergency power supply in exit status, or in the time that low pressure side no-voltage is used at station corresponding to the second operational mode of electricity generation system, or not receiving in the given time automatic throw-in equipment of emergency power supply moves when double power supply converting switch is switched to the information of the second place by primary importance, use and become on high-tension side circuit breaker by after electricity generation system and the effective isolation of electrical network by the station of corresponding the first operational mode of tripping, send the second operational order to the second control module 202, and send the second switching command to the 3rd control module 203 receiving the second control module 202 and complete after the information of the second operation task, the second control module 202 is when receiving after the second operational order, locking automatic throw-in equipment of emergency power supply, excise general load breaker simultaneously and be less than the generate output of electricity generation system with control area load, and be sent completely the information of the second operation task to the first control module 201, the 3rd control module 203 is receiving after the second switching command, the controller of controlling in electricity generation system transfers microgrid operational mode to by the pattern of generating electricity by way of merging two or more grid systems, wherein, between each control module, the transmission of message (comprising that operational order, task complete information, switching command etc.) generally completes by GOOSE network.
Therein in an embodiment, on the basis of above-described embodiment, the first control module 201 can also be used for when receiving while causing because of electric power system large-area power-cuts the information that occurs islet operation state, the circuit breaker at tripping electricity generation system networking place, and after default time delay, send the second switching command to the 3rd control module 203, the 3rd control module 203 is receiving after the second switching command, and the controller of controlling in electricity generation system transfers microgrid operational mode to by the pattern of generating electricity by way of merging two or more grid systems.
In addition; the first control module 201 can also be used in the time receiving the information of the islet operation state that trip protection or hand trip(ping) cause; controller in electricity generation system sends locking generation control instruction; when drop into again grid-connected system and need operations staff's manual confirmation; the information of the islet operation state that wherein, trip protection or hand trip(ping) cause is generally by GOOSE Internet Transmission.。
Wherein, the general load breaker that the second control module 202 is excised by control can be default element, can be also according to definite circuit breaker after current generated output and the calculating in real time of general load.
Embodiment 3
For the ease of understanding the present invention, the present invention is described in detail with a concrete example for the present embodiment, but this concrete example does not limit the scope of the claims of the present invention.The present embodiment is take micro-power system operating mode control method of photo-voltaic power generation station as example, shown in Figure 3, is photo-voltaic power generation station territory micro-power system operating mode control system relevant device layout plan of the present embodiment.
As shown in Figure 3: when photovoltaic generating system is through following running status generating, photovoltaic chamber DL circuit breaker at co-bit, 1G in co-bit; The connected 1QF24 circuit breaker of 0.4kV low-voltage distribution chamber I section bus at co-bit, 1ATS switch in A position, 11QF circuit breaker is in co-bit; The 1DL circuit breaker that 20kV high-tension distribution chamber of converting is connected with electric power system is in co-bit, and we are called photovoltaic generating system generates electricity by way of merging two or more grid systems through #1 station low pressure side, hereinafter to be referred as photovoltaic generation the first operational mode.
When photovoltaic generating system is through following running status generating, photovoltaic chamber DL circuit breaker at co-bit, 1G in co-bit; The connected 1QF24 circuit breaker of 0.4kV low-voltage distribution chamber I section bus at co-bit, 1ATS switch in B position, 12QF circuit breaker is in co-bit; The 2DL circuit breaker that 20kV high-tension distribution chamber of converting is connected with electric power system is in co-bit, and we are called photovoltaic generating system generates electricity by way of merging two or more grid systems through #2 station low pressure side, hereinafter to be referred as photovoltaic generation the second operational mode.
After photovoltaic generating system generates electricity by way of merging two or more grid systems by photovoltaic generation the first operational mode, may make photovoltaic generating system enter the situation of islet operation state as appearance time, the island protect of first standing in the micro-power grid control device 303 in territory can move tripping photovoltaic power generation grid-connecting circuit breaker (being tripping photovoltaic generation chamber DL circuit breaker), photovoltaic generating system is exited to the state of generating electricity by way of merging two or more grid systems, and judge whether the station low pressure side that does not connect photovoltaic generating system has voltage (as there is islet operation state in the time that photovoltaic generating system generates electricity by way of merging two or more grid systems by photovoltaic generation the first operational mode, judge whether #2 station low pressure side has voltage) and judge that automatic throw-in equipment of emergency power supply is in the state of putting into operation or exit status, if have voltage and stand-by power supply automatically to drop into function at input state, the micro-power grid control device 303 in the territory of standing judges that 0.4kV stand-by power supply drops into automatically and can recover photovoltaic generating system after function action and be incorporated into the power networks, if do not have voltage or stand-by power supply automatically to drop into function not at input state, the micro-power grid control device 303 in territory of standing judges that 0.4kV stand-by power supply automatically drops into function and can not move, need to consider to start microgrid operational mode, wherein, the stand module of the first control module in function and the embodiment 2 of the micro-power grid control device 303 in territory is similar.The micro-power grid control device 303 in territory of standing generally obtains by GOOSE networking the information that protective device 301 and measure and control device 302 and station send with low pressure side intelligent management system 304.
In the time having voltage and stand-by power supply automatically drop into function at input state, the territory microgrid operational mode control step of standing is as follows:
The first step automatically drops into element action until station and 1ATS (double power supply converting switch) is switched to by A position after the operation of B position with the interior stand-by power supply of low pressure side intelligent management system 304, stand the micro-power grid control device 303 in territory by the above information of GOOSE Network Capture, photovoltaic generation chamber DL circuit breaker is closed, stand and be equivalent to the function of the second control module in embodiment 2 by the function of low pressure side intelligent management system 304;
Second step: the micro-power grid control device 303 in the territory of standing closes by GOOSE network validation DL circuit breaker, notify the controller in photovoltaic generating system to start the pattern of generating electricity by way of merging two or more grid systems through GOOSE network by photovoltaic generation intelligent management system 305, photovoltaic generating system recovers to generate electricity by way of merging two or more grid systems running status;
The 3rd step: the micro-power grid control device 303 in the territory of standing does not obtain the station interior stand-by power supply of low pressure side intelligent management system 304 by GOOSE network and automatically drops into element action and 1ATS is switched to after the operation of B position by A position in Preset Time, the micro-power grid control device 303 in the territory of standing effectively isolates, notifies station low pressure side intelligent management system 304 locking stand-by power supplies automatically to drop into function electricity generation system and electrical network by the station of corresponding operational mode in GOOSE network notice protective device 301 tripping electricity generation systems with becoming on high-tension side circuit breaker;
The 4th step: the micro-power grid control device 303 in the territory of standing by GOOSE Network Capture protective device 301 by becoming on high-tension side circuit breaker tripping for the station of corresponding operational mode, stand and stand-by power supply is dropped into after element locking automatically with low pressure side intelligent management system 304, by the GOOSE network notice general load breaker of use low pressure side intelligent management system 304 tripping of standing;
The 5th step: the micro-power grid control device 303 in the territory of standing will generally have been loaded after excision with low pressure side intelligent management system 304 by GOOSE Network Capture station, the micro-power grid control device in the territory of the standing circuit breaker at electricity generation system networking place that closes;
The 6th step: the circuit breaker that the micro-power grid control device 303 in the territory of standing is confirmed electricity generation system networking place is after "on" position, the micro-power grid control device 303 in territory of standing after Preset Time starts microgrid operational mode by GOOSE network notice photovoltaic generation intelligent management system 305 by the controller in photovoltaic generating system, and photovoltaic generating system is pressed the generating of microgrid operational mode and recovered important load power supply.
In the time not having voltage or stand-by power supply automatically to drop into function in exit status, the territory microgrid operational mode control step of standing is as follows:
The first step: the micro-power grid control device 303 in the territory of standing effectively isolates, notifies station low pressure side intelligent management system 304 locking stand-by power supplies automatically to drop into function electricity generation system and electrical network by the station of corresponding operational mode in GOOSE network notice protective device 301 tripping electricity generation systems with becoming on high-tension side circuit breaker;
Second step: the micro-power grid control device 303 in the territory of standing by GOOSE Network Capture protective device 301 by becoming on high-tension side circuit breaker tripping for the station of corresponding operational mode, stand and stand-by power supply is dropped into after element locking automatically with low pressure side intelligent management system 304, by the GOOSE network notice general load breaker of use low pressure side intelligent management system 304 tripping of standing;
The 3rd step: the micro-power grid control device 303 in the territory of standing will generally have been loaded after excision with low pressure side intelligent management system 304 by GOOSE Network Capture station, the micro-power grid control device 303 in the territory of the standing circuit breaker at electricity generation system networking place that closes;
The 6th step: the circuit breaker that the micro-power grid control device 303 in the territory of standing is confirmed electricity generation system networking place is after "on" position, the micro-power grid control device 303 in territory of standing after Preset Time starts microgrid operational mode by GOOSE network notice photovoltaic generation intelligent management system 305 by the controller in photovoltaic generating system, and photovoltaic generating system is pressed the generating of microgrid operational mode and recovered important load power supply.
After photovoltaic generating system generates electricity by way of merging two or more grid systems by photovoltaic generation the second operational mode, control model is identical with above-mentioned control model, does not repeat one by one at this.
In addition, photovoltaic generating system, in the time of operation, there will be some special running statuses, the action situation explanation in the time there is special running status to the micro-power grid control in territory, station below:
The large-area power-cuts that cannot differentiate if there is territory, station island protect (as shown in Figure 3: in the time of photovoltaic generation the first operational mode or photovoltaic generation the second operational mode; the circuit breaker relevant to photovoltaic generating system all do not occur that position changes situation; but because causing, electric power system large-area power-cuts there is islet operation state); the conventional island protect of the micro-power grid control device 303 interior configurations in territory of standing can move and the circuit breaker DL at first tripping photovoltaic generating system place, and photovoltaic generating system is out of service.The micro-power grid control device 303 in territory of standing after the time delay of adjusting first sends tripping station with become high-pressure side circuit breaker order to station with becoming protective device 301 through GOOSE net, and district system and large electrical network are effectively isolated; Confirm above order after effectively execution, excise the general order of loading to intelligent station with becoming 304 of management systems; After confirming that general load effectively excises, the circuit breaker DL at the photovoltaic generating system place of tripping before the micro-power grid control device 303 in territory of standing closes, finally can notify photovoltaic generation intelligent management system 305 to send out and start microgrid operation generating order to the controller in photovoltaic generating system by GOOSE network, photovoltaic generating system is pressed microgrid operational mode and is recovered important load power supply.
If there is station territory island protect device, stand with the islet operation state that in change protective device or intelligent station change management system, trip protection or hand trip(ping) cause; the micro-power grid control device 303 in territory of standing can be received by GOOSE network after the information of above action behavior; send out locking generating order by GOOSE network notice photovoltaic generation intelligent management system 305 to the controller in photovoltaic generating system, when photovoltaic generating system puts into operation needs operations staff's manual confirmation.
The present invention, with respect to prior art, has following advantage and beneficial effect:
(1) the present invention can automatically switch to another road system large power supply to generate electricity by way of merging two or more grid systems or in the time that multiloop loop system large power supply all loses, automatically switch to micro-operation of power networks state and proposed effective solution to important load power supply in the situation that a certain road of system large power supply loses, do not affect the quality of power supply of electrical network, use the method design, construction, the each link of operation maintenance all can facilitate to such an extent that realize;
(2) implementation method of the present invention is direct, and criterion is perfect, takes into full account the situation of various operational modes and network failure or communicating interrupt, has higher accuracy and reliability;
(3) the present invention has powerful GOOSE function, do not need cable to get final product contact and the cooperation between implement device, by GOOSE network interaction information, the real time discriminating of realizing operational mode switches in real time, realize the automatic control function of the micro-power system operating mode in territory, station, improve the reliability of important load power supply, for the application of the micro-operation of power networks control technology in territory, station in Intelligent transformer station provides example;
(4) device is applicable to the automatic control of the operational mode of wind power generation, photovoltaic generation distributed power supply.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (10)

1. territory, a station control method for micro-power system operating mode, is characterized in that, comprises the steps:
In the time that electricity generation system is generated electricity by way of merging two or more grid systems according to the first operational mode, there is islet operation state if receive and by the circuit breaker at tripping electricity generation system networking place, electricity generation system is exited to the information of the pattern of generating electricity by way of merging two or more grid systems, whether station low pressure side corresponding to the second operational mode that judges electricity generation system has voltage, and judges that automatic throw-in equipment of emergency power supply is in the state of putting into operation or exit status;
If it is at the state of putting into operation that there are voltage and automatic throw-in equipment of emergency power supply in station corresponding to the second operational mode of electricity generation system by low pressure side, in the pattern of generating electricity by way of merging two or more grid systems receiving under the second operational mode that starts electricity generation system after automatic throw-in equipment of emergency power supply correct operation information;
If station corresponding to the second operational mode of electricity generation system is in exit status with low pressure side no-voltage or automatic throw-in equipment of emergency power supply, or in Preset Time, do not receive the information of automatic throw-in equipment of emergency power supply correct operation, after locking automatic throw-in equipment of emergency power supply, start microgrid operational mode;
Wherein, described electricity generation system comprises two loops that generate electricity by way of merging two or more grid systems, if generating electricity by way of merging two or more grid systems by described two loops that generate electricity by way of merging two or more grid systems that generate electricity by way of merging two or more grid systems in loop is the first operational mode, generating electricity by way of merging two or more grid systems by two another loops that generate electricity by way of merging two or more grid systems, loop that generate electricity by way of merging two or more grid systems is the second operational mode.
2. territory, the station control method of micro-power system operating mode according to claim 1, it is characterized in that, if it is at the state of putting into operation that there are voltage and automatic throw-in equipment of emergency power supply in station corresponding to the second operational mode of described electricity generation system by low pressure side, comprise the steps: in the pattern of generating electricity by way of merging two or more grid systems receiving under the second operational mode that starts electricity generation system after automatic throw-in equipment of emergency power supply action message
When receiving the information of automatic throw-in equipment of emergency power supply at the state of input, and receive in the given time automatic throw-in equipment of emergency power supply correct operation double power supply converting switch is switched to after the information of the second place by primary importance, the circuit breaker at the electricity generation system of closing networking place;
When receiving after circuit breaker that double power supply converting switch is positioned at the second place and the electricity generation system networking place information in co-bit, enable the pattern of generating electricity by way of merging two or more grid systems, electricity generation system is generated electricity by way of merging two or more grid systems with the second operational mode;
Wherein, primary importance by double power supply converting switch corresponding to the first operational mode in place, the second place by double power supply converting switch corresponding to the second operational mode in place.
3. territory, the station control method of micro-power system operating mode according to claim 2, it is characterized in that, if station corresponding to the second operational mode of described electricity generation system is in exit status with low pressure side no-voltage or automatic throw-in equipment of emergency power supply, after locking automatic throw-in equipment of emergency power supply, starts microgrid operational mode and comprise the steps:
When receiving the information of automatic throw-in equipment of emergency power supply in exit status, or the no-voltage information of low pressure side for station that the second operational mode that receives electricity generation system is corresponding, or do not receive in the given time automatic throw-in equipment of emergency power supply correct operation double power supply converting switch is switched to by primary importance the information of the second place, electricity generation system and electrical network are effectively isolated with becoming on high-tension side circuit breaker by the station of corresponding the first operational mode in tripping electricity generation system;
Locking automatic throw-in equipment of emergency power supply, loads and is less than the generate output of electricity generation system with control area by excising general load breaker simultaneously;
Switch to microgrid operational mode by the pattern of generating electricity by way of merging two or more grid systems.
4. according to territory, the station control method of the micro-power system operating mode one of claims 1 to 3 Suo Shu, it is characterized in that, also comprise step:
When receiving while causing because of electric power system large-area power-cuts the information that occurs islet operation state, the circuit breaker at tripping electricity generation system networking place;
After default time delay, before tripping electric power system large-area power-cuts, in the operational mode of correspondence, stand with becoming high-pressure side circuit breaker;
Excise general load breaker and be less than after the generate output of electricity generation system with control area load, the circuit breaker at the electricity generation system of closing networking place;
When receiving after the information that the circuit breaker at electricity generation system networking place closes, enable microgrid operational mode.
5. territory, the station control method of micro-power system operating mode according to claim 4, is characterized in that, also comprises step:
In the time receiving the information of the islet operation state that trip protection or hand trip(ping) cause, locking microgrid operational mode or the pattern of generating electricity by way of merging two or more grid systems.
6. territory, a station control system for micro-power system operating mode, is characterized in that, comprising:
The first control module, for generating electricity by way of merging two or more grid systems according to the first operational mode when electricity generation system, there is islet operation state if receive and receive by the circuit breaker at tripping electricity generation system networking place, electricity generation system being exited after the information of the pattern of generating electricity by way of merging two or more grid systems, judge whether station corresponding to the second operational mode low pressure side has voltage:
The second control module, for when station corresponding to the second operational mode have voltage by low pressure side and receive automatic throw-in equipment of emergency power supply input state information time, judge in Preset Time automatic throw-in equipment of emergency power supply whether correct operation double power supply converting switch is switched to the information of the second place by primary importance, also for working as the information of automatic throw-in equipment of emergency power supply in exit status that receives, or station corresponding to the second operational mode low pressure side no-voltage of electricity generation system, or do not receive in the given time automatic throw-in equipment of emergency power supply action double power supply converting switch be switched to by primary importance the information of the second place, locking automatic throw-in equipment of emergency power supply,
The 3rd control module, for double power supply converting switch being switched to by primary importance after the information of the second place when automatic throw-in equipment of emergency power supply correct operation, the second operational mode that starts electricity generation system is generated electricity by way of merging two or more grid systems, after the second control module locking automatic throw-in equipment of emergency power supply, start microgrid operational mode;
Wherein, described electricity generation system comprises two loops that generate electricity by way of merging two or more grid systems, if generating electricity by way of merging two or more grid systems by described two loops that generate electricity by way of merging two or more grid systems that generate electricity by way of merging two or more grid systems in loop is the first operational mode, generating electricity by way of merging two or more grid systems by two another loops that generate electricity by way of merging two or more grid systems, loop that generate electricity by way of merging two or more grid systems is the second operational mode, primary importance by described double power supply converting switch corresponding to the first operational mode in place, the second place by the double power supply converting switch described in the second operational mode correspondence in place.
7. territory, the station control system of micro-power system operating mode according to claim 6, is characterized in that:
In the time that station has voltage and automatic throw-in equipment of emergency power supply at the state of input by low pressure side, described the first control module sends the first operational order to the second control module, and for receiving the second control module and complete the information of the first operation task, after the circuit breaker at the electricity generation system of closing networking place, send the first switching command to the 3rd control module;
Described the second control module is receiving the first operational order, and in Preset Time, receive automatic throw-in equipment of emergency power supply correct operation double power supply converting switch is switched to by primary importance after the information of the second place, be sent completely the information of the first operation task to the first control module;
Described the 3rd control module is receiving after the first switching command, and the controller of controlling in electricity generation system is enabled the pattern of generating electricity by way of merging two or more grid systems, and electricity generation system is generated electricity by way of merging two or more grid systems with the second operational mode.
8. territory, the station control system of micro-power system operating mode according to claim 7, is characterized in that:
Described the first control module is also for controlling the on high-tension side circuit breaker of station change of electricity generation system, in the time receiving the information of automatic throw-in equipment of emergency power supply in exit status, or in the time that low pressure side no-voltage is used at station corresponding to the second operational mode of electricity generation system, or not receiving in the given time automatic throw-in equipment of emergency power supply moves when double power supply converting switch is switched to the information of the second place by primary importance, use and become on high-tension side circuit breaker by after electricity generation system and the effective isolation of electrical network by the station of corresponding the first operational mode of tripping, send the second operational order to the second control module, and send the second switching command to the 3rd control module receiving the second control module and complete after the information of the second operation task,
Described the second control module is when receiving after the second operational order, locking automatic throw-in equipment of emergency power supply, excise general load breaker simultaneously and be less than the generate output of electricity generation system with control area load, and be sent completely the information of the second operation task to the first control module;
The 3rd control module is receiving after the second switching command, and the controller of controlling in electricity generation system transfers microgrid operational mode to by the pattern of generating electricity by way of merging two or more grid systems.
9. territory, the station control system of micro-power system operating mode according to claim 8, is characterized in that:
Described the first control module is also for when receiving while causing because of electric power system large-area power-cuts the information that occurs islet operation state, the circuit breaker at tripping electricity generation system networking place, and after default time delay, send the second switching command to the 3rd control module;
Or
Described the first control module is also in the time receiving the information of the islet operation state that trip protection or hand trip(ping) cause, the controller in electricity generation system sends locking generation control instruction.
10. territory, the station control system of micro-power system operating mode according to claim 8, it is characterized in that, the general load breaker of the second control module excision can be default element, can be also according to definite circuit breaker after current generated output and general real-time calculating of loading.
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