CN102570455A - Intelligent microgrid power-supply system - Google Patents
Intelligent microgrid power-supply system Download PDFInfo
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- CN102570455A CN102570455A CN2012100079207A CN201210007920A CN102570455A CN 102570455 A CN102570455 A CN 102570455A CN 2012100079207 A CN2012100079207 A CN 2012100079207A CN 201210007920 A CN201210007920 A CN 201210007920A CN 102570455 A CN102570455 A CN 102570455A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention relates to an intelligent microgrid power-supply system which is formed by a power distribution cabinet special for a microgrid, an energy management system, a distributed power source loop, a load loop, an energy storage loop and an active filtering loop. The intelligent microgrid power-supply system achieves diversified application of a novel power source and a novel load in an intelligent building power-supply system, the problem of negative influence of complexity of the building power-supply system on a power distribution system is solved, and novel intelligent building power supply can be accepted by a large power distribution system. By control of the energy management system, multifunctional innovation of the power distribution cabinet special for the microgrid, reasonable coordinating operation of the distributed power source loop and the energy storage loop and peak valley electrovalence adjustment, the intelligent microgrid power-supply system achieves the aims of the demand side response load adjustment and peak clipping and valley filling of a distributed power source, and the running of the microgrid is safe and reliable through conversion of grid connection and an islanding mode.
Description
Technical field
The invention belongs to power supply, distribution, electricity consumption and electrified field, what be specifically related to is the little mains supply of a kind of intelligence system.
Background technology
Develop rapidly along with the architectural electricity systems technology; The variation day by day of building building electric load, energy-saving and cost-reducing clean energy resource such as photovoltaic generation, wind power generation also are widely used in building building gradually, and the intermittence of load and power supply has produced extremely passive influence to power supply quality, economical operation; Also be not directed against the electric power system of little electrical network characteristic at present; Use traditional electric power system, make operational mode, system's control all become a difficult problem.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art,,, and provide a kind of reasonable in design, diverse in function, the little mains supply of utilization of power efficient intelligent system to the extensive popularization of novel energy to the specific (special) requirements of little mains supply.
The present invention realizes through following technical scheme:
The little mains supply of a kind of intelligence system; Constitute by the special-purpose power distribution cabinet of little electrical network, distributed power source loop, load loop, tank circuit, active power filtering loop and EMS; Little electrical network is connected with higher level's electrical network through the special-purpose power distribution cabinet of little electrical network; The special-purpose power distribution cabinet of little electrical network is connected with interior distributed power source loop, load loop, tank circuit, the active power filtering loop of little electrical network, and EMS is connected with the special-purpose power distribution cabinet of little electrical network, distributed power source loop, tank circuit respectively.
And; The special-purpose power distribution cabinet of said little electrical network includes the loop of being incorporated into the power networks, feeder assembly; The said loop of being incorporated into the power networks, feeder assembly is integrated side by side is installed in the multi-functional distribution cabinet; The said loop of being incorporated into the power networks includes: two-way charging electric meter, electric energy quality monitoring terminal, the switch sections that is incorporated into the power networks, active filter, bus differential protecting device, current transformer, voltage transformer and little mains supply bus, and said two-way charging electric meter, electric energy quality monitoring terminal, active filter, bus differential protecting device link to each other with externally fed circuit and little electrical network circuit through current transformer and are used to gather the current signal of outer net circuit and little electrical network circuit; Said feeder assembly adopts drawer type modular assembly structure; All include feeder line circuit breaker, feeder line release, current transformer and digital ammeter in each drawer type module; Said each drawer type module one end links to each other with power supply buses, and other end output links to each other with each loop.
Said two-way charging electric meter is installed in the top of the special-purpose power distribution cabinet panel of little electrical network; And through the perspective valve protect; Said Power Quality Detection terminal is installed in the bottom of the special-purpose power distribution cabinet panel of little electrical network; The terminal board of said electric energy quality monitoring terminal links to each other with the terminal board of current transformer through control cable, the USB interface realization information remote transmitting through self ETX plate simultaneously, and also the standby plate of electric energy quality monitoring terminal is that multiloop provides information.
The said switch sections that is incorporated into the power networks includes the circuit breaker that is incorporated into the power networks, release; Said switch sections one end that is incorporated into the power networks links to each other with power supply buses; The other end connects little electrical network higher level power distribution station power supply circuits; The said switch sections that is incorporated into the power networks is packed in the inside of the special-purpose power distribution cabinet of said little electrical network by bolt, and shows its operating state through the indicator light on the special-purpose power distribution cabinet panel of little electrical network, and the operating voltage of indicator light is taken from the circuit breaker that is incorporated into the power networks.
Said active filter one end is gathered the current waveform information that little electrical network is incorporated into the power networks and locates through current transformer, and the other end is connected with little mains supply bus through feeder assembly.
Said bus differential protecting device connects be incorporated into the power networks circuit breaker and feeder line part through control cable respectively, gathers the electric current in each loop through the current transformer in each loop, gathers busbar voltage through voltage transformer.
Said each drawer type module surface is equipped with working station indicator, jumping/switch knob, the pull handle of feeder line circuit breaker, and the operating voltage of this indicator light is taken from the feeder line circuit breaker.
Be fixed with radiator in the bottom of the special-purpose power distribution cabinet of said little electrical network, radiator passes through to cooperate with it, and opens shutter and heat exchange with outside on the special-purpose power distribution cabinet lower case of little electrical network.
And; Said little electrical network bus differential protecting device; Connect and compose by fault detect judgment part, little electric network protection tripping operation part; Said fault detect judgment part is inserted the be incorporated into the power networks magnitude of current in loop, load loop, tank circuit, distributed power source loop and the voltage of bus-bar potential transformer of little electrical network on the one hand and is carried out state-detection, is connected with the microgrid energy management system on the other hand and carries out exchanges data; Said little electric network protection tripping operation part is connected be incorporated into the power networks loop, load loop, distributed power source loop, tank circuit, active power filtering loop of little electrical network respectively, through the open and close state in each loop of protection tripping operation control.
Said fault detect judgment part is divided into little electrical network external area error and little electrical network troubles inside the sample space with detection case.
Said fault detect judgment part is when being judged as the generation external area error; The fault detect judgment part will start little electric network protection tripping operation part through control signal; Little electrical network loop of being incorporated into the power networks is broken off in little electric network protection tripping operation time-delay, and the fault detect judgment part is sent alarm signal to the microgrid energy management system and ordered with mode switch.Said fault detect judgment part is when being judged as the generating region internal fault; The fault detect judgment part is transmitted to said little electric network protection tripping operation part with control signal; Trip command is sent in protection tripping operation fast, breaks off little electrical network be incorporated into the power networks loop, load loop, distributed power source loop, tank circuit, active power filtering loop.
And; Said distributed power source loop; Be to constitute by photo-voltaic power supply, wind-force power supply, low pressure lightning-protection module, low-voltage circuit breaker, combining inverter; Said photo-voltaic power supply, wind-force power supply respectively are connected with the feeder assembly of the special-purpose power distribution cabinet of little electrical network, and carry out information interaction through combining inverter and microgrid energy management system through low pressure lightning-protection module, low-voltage circuit breaker, combining inverter, low-voltage circuit breaker, low pressure lightning-protection module.
And said tank circuit is connected and composed by the feeder assembly of energy-storage battery through two-way combining inverter and the special-purpose power distribution cabinet of little electrical network, and carries out the information interaction scheduling through two-way inverter and microgrid energy management system.
And said load loop is made up of light distribution box, vehicle charging stake, electric distribution system, links to each other with little electrical network bus via the feeder assembly of the special-purpose power distribution cabinet of little electrical network, and controlled by EMS through each circuit breaker.
And; The information interaction of said EMS in little electrical network is to be realized by secondary circuit; Include in the secondary circuit; Intelligent terminal, background host computer, the background host computer intelligent terminal through each loop is gathered each loop on the inverter in each loop, circuit breaker, current transformer electric current, voltage, generated output, quality of voltage, inverter operating state, tank circuit meritorious, idle and distributed power source discharge and recharge degree.
Good effect of the present invention is:
1, a kind of novel intelligent architectural power supply system that the present invention relates to based on distributed power source technology and energy storage technology; Include distributed power source control technology, load rating control technology, energy storage technology, Microcomputer Protection technological system energy management technology and harmonic wave control technology; Realized the variation application in the intelligent building electric power system of novel power supply and novel load; Solved of the negative influence of the complexity of building electric power systems to distribution system; Make that the power supply of novel intelligent building can be admitted by the big system of distribution, and significantly improved intelligent building electric power system reliability of operation, fail safe and economy to have important popularization demonstration meaning.
2, the present invention includes the special-purpose power distribution cabinet of little electrical network, distributed power source loop, load loop, tank circuit, active power filtering loop and EMS; Can realize the reliable conversion of the islet operation pattern and the pattern that is incorporated into the power networks; Can make response to voltage fluctuation, harmonic effects in real time, big system is admitted by distribution; And this system has dispatches controllability flexibly; Guaranteeing the load reliability service and do not influencing under the prerequisite of distribution system; Can accomplish economical operation, energy conservation and consumption reduction effects is obvious, and power supply performance is far superior to traditional electric power system; Fully solved emerging load (like vehicle charging stake, impact living load etc.) and the new forms of energy reliable application problem in the building building, and made the economy of electric power system and fail safe be significantly improved through novel energy storage technology.
3, many new technologies have been integrated to the invention property; Like distributed power source technology, load rating control technology, energy storage technology, system capacity administrative skill and harmonic wave control technology etc.; And cooperate higher level's distribution system to create the Microcomputer Protection of building low-pressure systems; Guarantee the power supply reliability under the various operational modes, be mainly reflected in the following aspects:
A introduces the building electric power system with photovoltaic generation, wind power generation as vital power supply, adopts the system capacity administrative skill to solve the operation control and the scheduling matching problem of fitful power and distribution system;
B has creatively used high power lithium battery energy storage technology, can be directed against the electric power system operation characteristic, formulates the strategy that discharges and recharges that rationally enriches;
C adopts and is incorporated into the power networks and two kinds of operational modes of isolated island, can realize that seaming and cutting are changed or seamless switching;
The d load adopts the classification operation control method, and novel electric automobile charging pile has been incorporated into the intelligent building system;
E creates unique low voltage electric network Microcomputer Protection, has formed the protection coordinated scheme of intelligent building load side, electric power system and the big system of distribution.
Description of drawings
Fig. 1 is a system of the present invention distribution schematic diagram;
Fig. 2 is the topology view of the special-purpose power distribution cabinet of little electrical network of the present invention;
Fig. 3 is the loop of being incorporated into the power networks of the special-purpose power distribution cabinet of the little electrical network of the present invention, the elementary diagram of feeder assembly;
Fig. 4 is the Power Quality Detection terminal backboard wiring schematic diagram of the special-purpose power distribution cabinet of the little electrical network of the present invention;
Fig. 5 is the block diagram of the little electrical network bus differential protecting of the present invention device;
Fig. 6 connects sketch map for the circuit of the little electrical network bus differential protecting of the present invention device.
Embodiment
Further specify the present invention below in conjunction with 400 volts of little electrical network practical implementation methods, following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
The little mains supply of a kind of intelligence system; As shown in Figure 1; Be to constitute by the special-purpose power distribution cabinet of little electrical network, distributed power source loop, load loop, tank circuit, active power filtering loop and EMS; Little electrical network is connected with higher level's electrical network through the special-purpose power distribution cabinet of little electrical network; The special-purpose power distribution cabinet of little electrical network is connected with interior distributed power source loop, load loop, tank circuit, the active power filtering loop of little electrical network, and EMS is connected with the special-purpose power distribution cabinet of little electrical network, distributed power source loop, tank circuit respectively.
Structure in the face of each subsystem in the micro-grid system describes respectively down:
1, micro-grid system special-purpose multifunctional power distribution cabinet; As shown in Figure 2; Include the loop 11 of being incorporated into the power networks, feeder assembly 12; The said loop of being incorporated into the power networks, feeder assembly is integrated side by side is installed in the special-purpose power distribution cabinet 13, and the said loop of being incorporated into the power networks is as shown in Figure 3; Include: two-way charging electric meter (DTSD341) 9, electric energy quality monitoring terminal (SN5000D) 7, the switch sections 4 that is incorporated into the power networks, active filter 6, bus differential protecting device 3, current transformer 23, (400/100) 20 and 400 volt of power supply buses 8 of voltage transformer.
As shown in Figure 3; Said two-way charging electric meter (DTSD341), electric energy quality monitoring terminal (SN5000D), active filter, bus differential protecting device; Link to each other with externally fed circuit and little electrical network circuit through current transformer, be used to gather the current signal of outer net circuit and little electrical network circuit.
Shown in Fig. 2 or 4; Said two-way charging electric meter is installed in the top of the special-purpose power distribution cabinet panel of little electrical network; And protect through perspective valve 10, said Power Quality Detection terminal is installed in the bottom of the special-purpose power distribution cabinet panel of little electrical network, and the terminal board of said electric energy quality monitoring terminal passes through control cable and links to each other with the terminal board of current transformer; Realize information remote transmitting through the USB interface of self ETX plate simultaneously, and the standby plate of electric energy quality monitoring terminal provides information for multiloop simultaneously.
Shown in Fig. 2 or 3, the said switch sections that is incorporated into the power networks includes: the circuit breaker that is incorporated into the power networks (T4N250/4P) 22, and release (PD221DS/LSI) 21, said switch sections one end that is incorporated into the power networks links to each other with 400 volts of power supply buses, and the other end connects little electrical network higher level power distribution station power supply circuits; The said switch sections that is incorporated into the power networks is packed in the inside of the special-purpose power distribution cabinet of said little electrical network by bolt, and shows its operating state through the indicator light 5 on the special-purpose power distribution cabinet panel of little electrical network, and the operating voltage of indicator light is taken from the circuit breaker that is incorporated into the power networks.
Shown in Fig. 2 or 3; Said active filter is gathered the current waveform information that little electrical network is incorporated into the power networks and locates through current transformer; Be connected with little mains supply bus through feeder assembly simultaneously, filtering is harmful to harmonic wave, and said active filter is packed in the inside of the special-purpose power distribution cabinet of little electrical network.
As shown in Figure 3, said bus differential protecting device connects be incorporated into the power networks circuit breaker 22 and feeder assembly through control cable respectively, gathers the electric current in each loop through the current transformer 23,26 in each loop, gathers busbar voltage through voltage transformer.
Shown in Fig. 2 or 3, said 400 volts of power supply buses are packed in the inside of the special-purpose power distribution cabinet of said little electrical network, and with the circuit breaker that is incorporated into the power networks, feeder line part and voltage transformer link to each other.
Shown in Fig. 2 or 3; The feeder assembly of the special-purpose power distribution cabinet of said little electrical network adopts drawer type module 17 modular constructions; All including feeder line circuit breaker (T2N160/4P) 25, feeder line release 24 (PD221DS/LSI), current transformer 26 (ALH-0.66), digital ammeter 27 (PM800) in each module. each drawer type module surface is equipped with working station indicator 14, jumping/switch knob 15, the pull handle 18 of feeder line circuit breaker; The operating voltage of indicator light is taken from the feeder line circuit breaker; Said feeder assembly drawer type module is packed on the panel of the special-purpose power distribution cabinet of little electrical network by bolt 19; The one of which end links to each other with 400 volts of power supply buses, and other end output links to each other with each loop.
As shown in Figure 2, be fixed with radiator 2 in the bottom of the special-purpose power distribution cabinet of said little electrical network, radiator passes through to cooperate with it, and opens shutter 1 and the heat exchange with outside on little electrical network power distribution cabinet lower case.
Little electrical network bus differential protecting device; Shown in Fig. 5 or 6; Be to connect and compose by fault detect judgment part, little electric network protection tripping operation part; Said fault detect judgment part is inserted the be incorporated into the power networks magnitude of current (drawing the current transformer from secondary current 5A) of loop current (I1), load loop electric current (I2), tank circuit electric current (I3), distributed power source loop current (I4...In) and the voltage U (secondary voltage is the voltage transformer of 100V) of bus-bar potential transformer of little electrical network on the one hand and is carried out state-detection; Be connected with the microgrid energy management system on the other hand; The line data of going forward side by side exchange, said little electric network protection tripping operation part respectively with little electrical network be incorporated into the power networks loop, load loop, distributed power source loop, tank circuit, the active power filtering loop is connected.
Said fault detect judgment part is divided into little electrical network external area error and little electrical network troubles inside the sample space with detection case; As be external area error; Said fault detect judgment part will start little electric network protection tripping operation part through control signal; The tripping operation of little electric network protection will be broken off little electrical network loop of being incorporated into the power networks through the circuit breaker time-delay, be failure to actuate in other loop, and simultaneous faults detects the judgment part and sends alarm signal to the microgrid energy management system and order with mode switch.As be troubles inside the sample space; Power frequency variation electric current and electric current split-phase type current differential protection principle will be adopted in said fault detect judgment part; To the fault signature of micro-grid system different faults type, sudden change is set starts and delayed startup both sides case, control signal is transmitted to said little electric network protection tripping operation part; Realize the tripping operation action through each side circuit breaker, break off little electrical network be incorporated into the power networks loop, load loop and distributed power source loop.
Shown in Fig. 5 or 6; Said little electric network protection tripping operation part respectively with little electrical network be incorporated into the power networks loop, load loop, distributed power source loop, tank circuit; The active power filtering loop is connected; Through auxiliary each side circuit breaker of node tripping, through mutual with the microgrid energy management system, locked loop or carry out little operation of power networks mode switch.
Further describe with regard to little electrical network external area error and two kinds of situation of little electrical network troubles inside the sample space below:
(1), little electrical network generation external area error (the civil power side breaks down):
Higher level's civil power breaks down; Loop decompression, undercurrent are incorporated into the power networks; Judge it is that external area error takes place through calculating, this moment, bus differential protecting device trip(ping) circuit locking was cut to the analysis of microgrid energy management system control strategy; The operational mode conversion command is sent on microgrid energy management system backstage, and the pattern of being incorporated into the power networks transfers the islet operation pattern to.The tripping operation of the combining inverter of all distributed power sources and tank circuit, operational mode transfers the V/F pattern of isolated island, the combining inverter combined floodgate of all distributed power sources and tank circuit, the automatic involution of bus differential protecting device to by the P/Q pattern that is incorporated into the power networks.
(2), little electrical network generating region internal fault:
The phase failure takes place mutually like little electrical network bus A; The serious decompression of A phase bus; The bus differential protecting device is judged the generating region internal fault; The tripping operation quality is sent in trip(ping) circuit this moment fast, excises little electrical network be incorporated into the power networks loop and all little electrical network feeder assemblies, and sends alarm signal to microgrid energy management system backstage.Alarm signal is received on microgrid energy management system backstage, and control strategy is closed.After maintenance is accomplished, hand resetting bus differential protecting device.
2, said distributed power source loop; As shown in Figure 1; Be to constitute by photo-voltaic power supply, wind-force power supply, low pressure lightning-protection module, low-voltage circuit breaker, combining inverter; Said photo-voltaic power supply, wind-force power supply respectively are connected with the feeder assembly of the special-purpose power distribution cabinet of little electrical network, and carry out information interaction through combining inverter and microgrid energy management system through low pressure lightning-protection module, low-voltage circuit breaker, combining inverter, low-voltage circuit breaker, low pressure lightning-protection module.
3, said tank circuit; As shown in Figure 1, through two-way combining inverter, be connected with the feeder assembly module of the special-purpose power distribution cabinet of little electrical network, the bidirectional energy-storage inverter is realized the management of charging and discharging function for energy-storage battery by energy-storage battery; When energy-storage battery passes through the bidirectional energy-storage inverter to the electrical network feedback electric energy; Can regulate the active power of feedback, when the energy-storage battery magnitude of voltage was lower than perunit value 90%, energy-storage battery stopped discharge; When energy-storage battery absorbs electric energy through two-way combining inverter, preliminary filling, fill soon, all fill, the voltage of floating charge can control through interface, thereby optimize the charging process of energy-storage battery.Simultaneously, the two-way energy storage inverter that is incorporated into the power networks also can carry out dynamic passive compensation when little electrical network is incorporated into the power networks, and realizes economical operation.
4, said load loop is as shown in Figure 1, is by various little network loads: illuminator, vehicle charging stake, electric distribution cabinet etc. link to each other with little electrical network bus via the feeder assembly module of the special-purpose power distribution cabinet of little electrical network, and controlled by EMS; According to load prediction, the power of keeping little electrical network of exerting oneself of distributed power source loop and energy-storage battery is in poised state.On the one hand, and net state under, can have at the distributed power source generated output under the situation of redundancy according to the exchange power of external electrical network with little mains supply system, unnecessary electric energy is fed back to electrical network; On the other hand,, can guarantee long playing characteristics, make little mains supply system long-play under good voltage and frequency in conjunction with the quick adjustment of energy-storage battery and distributed power source generating under net state.
5, said active power filtering loop, as shown in Figure 1, an end is gathered the current waveform information that little electrical network is incorporated into the power networks and locates through current transformer, and the other end is connected with little mains supply bus through feeder assembly, and filtering is harmful to harmonic wave.
6, said EMS, as shown in Figure 1, be via secondary circuit, be connected with inverter, circuit breaker, the current transformer in each loop in little electrical network through intelligent terminal by background host computer.Background host computer is through the intelligent terminal in each loop; On the inverter in each loop, circuit breaker, current transformer, gather the electric current, voltage, meritorious, idle etc. in each loop, the generated output of distributed distributed power source, quality of voltage, inverter operating state, energy-storage system discharge and recharge degree etc.All intelligent terminals reach the backstage with information, and EMS is through the control strategy analytical calculation of self, and logical consequence and action command are redispatched to each loop through intelligent terminal; The management loop of said EMS is to be made up of secondary circuit; Accomplish the transmission of the mutual and control command of information through the intelligent terminal of secondary circuit, thereby realize the controlled function of microgrid EMS, through uniform dispatching various energy resources to the microgrid system master; Promptly can satisfy the demand of user to electric energy; Can realize the high-efficiency and economic operation again, distributed power generation, energy storage, load are considered in system coordination, reach best using energy source and economy.
Claims (7)
1. the little mains supply of intelligence system; It is characterized in that: constitute by the special-purpose power distribution cabinet of little electrical network, distributed power source loop, load loop, tank circuit, active power filtering loop and EMS; Little electrical network is connected with higher level's electrical network through the special-purpose power distribution cabinet of little electrical network; The special-purpose power distribution cabinet of little electrical network is connected with interior distributed power source loop, load loop, tank circuit, the active power filtering loop of little electrical network, and EMS is connected with the special-purpose power distribution cabinet of little electrical network, distributed power source loop, tank circuit respectively.
2. the little mains supply of intelligence according to claim 1 system; It is characterized in that: the special-purpose power distribution cabinet of said little electrical network includes the loop of being incorporated into the power networks, feeder assembly; The said loop of being incorporated into the power networks, feeder assembly is integrated side by side is installed in the multi-functional distribution cabinet; The said loop of being incorporated into the power networks includes: two-way charging electric meter, electric energy quality monitoring terminal, the switch sections that is incorporated into the power networks, active filter, bus differential protecting device, current transformer, voltage transformer and little mains supply bus, and said two-way charging electric meter, electric energy quality monitoring terminal, active filter, bus differential protecting device link to each other with externally fed circuit and little electrical network circuit through current transformer and are used to gather the current signal of outer net circuit and little electrical network circuit; Said feeder assembly adopts drawer type modular assembly structure; All include feeder line circuit breaker, feeder line release, current transformer and digital ammeter in each drawer type module; Said each drawer type module one end links to each other with power supply buses, and other end output links to each other with each loop.
Said two-way charging electric meter is installed in the top of the special-purpose power distribution cabinet panel of little electrical network; And through the perspective valve protect; Said Power Quality Detection terminal is installed in the bottom of the special-purpose power distribution cabinet panel of little electrical network; The terminal board of said electric energy quality monitoring terminal links to each other with the terminal board of current transformer through control cable, the USB interface realization information remote transmitting through self ETX plate simultaneously, and also the standby plate of electric energy quality monitoring terminal is that multiloop provides information.
The said switch sections that is incorporated into the power networks includes the circuit breaker that is incorporated into the power networks, release; Said switch sections one end that is incorporated into the power networks links to each other with power supply buses; The other end connects little electrical network higher level power distribution station power supply circuits; The said switch sections that is incorporated into the power networks is packed in the inside of the special-purpose power distribution cabinet of said little electrical network by bolt, and shows its operating state through the indicator light on the special-purpose power distribution cabinet panel of little electrical network, and the operating voltage of indicator light is taken from the circuit breaker that is incorporated into the power networks.
Said active filter one end is gathered the current waveform information that little electrical network is incorporated into the power networks and locates through current transformer, and the other end is connected with little mains supply bus through feeder assembly.
Said bus differential protecting device connects be incorporated into the power networks circuit breaker and feeder line part through control cable respectively, gathers the electric current in each loop through the current transformer in each loop, gathers busbar voltage through voltage transformer.
Said each drawer type module surface is equipped with working station indicator, jumping/switch knob, the pull handle of feeder line circuit breaker, and the operating voltage of this indicator light is taken from the feeder line circuit breaker.
Be fixed with radiator in the bottom of the special-purpose power distribution cabinet of said little electrical network, radiator passes through to cooperate with it, and opens shutter and heat exchange with outside on the special-purpose power distribution cabinet lower case of little electrical network.
3. the little mains supply of intelligence according to claim 2 system; It is characterized in that: said little electrical network bus differential protecting device; Connect and compose by fault detect judgment part, little electric network protection tripping operation part; Said fault detect judgment part is inserted the be incorporated into the power networks magnitude of current in loop, load loop, tank circuit, distributed power source loop and the voltage of bus-bar potential transformer of little electrical network on the one hand and is carried out state-detection, is connected with the microgrid energy management system on the other hand and carries out exchanges data; Said little electric network protection tripping operation part is connected be incorporated into the power networks loop, load loop, distributed power source loop, tank circuit, active power filtering loop of little electrical network respectively, through the open and close state in each loop of protection tripping operation control.
Said fault detect judgment part is divided into little electrical network external area error and little electrical network troubles inside the sample space with detection case.
Said fault detect judgment part is when being judged as the generation external area error; The fault detect judgment part will start little electric network protection tripping operation part through control signal; Little electrical network loop of being incorporated into the power networks is broken off in little electric network protection tripping operation time-delay, and the fault detect judgment part is sent alarm signal to the microgrid energy management system and ordered with mode switch.Said fault detect judgment part is when being judged as the generating region internal fault; The fault detect judgment part is transmitted to said little electric network protection tripping operation part with control signal; Trip command is sent in protection tripping operation fast, breaks off little electrical network be incorporated into the power networks loop, load loop, distributed power source loop, tank circuit, active power filtering loop.
4. the little mains supply of intelligence according to claim 1 and 2 system; It is characterized in that: said distributed power source loop; Be to constitute by photo-voltaic power supply, wind-force power supply, low pressure lightning-protection module, low-voltage circuit breaker, combining inverter; Said photo-voltaic power supply, wind-force power supply respectively are connected with the feeder assembly of the special-purpose power distribution cabinet of little electrical network, and carry out information interaction through combining inverter and microgrid energy management system through low pressure lightning-protection module, low-voltage circuit breaker, combining inverter, low-voltage circuit breaker, low pressure lightning-protection module.
5. the little mains supply of intelligence according to claim 1 and 2 system; It is characterized in that: said tank circuit is connected and composed by the feeder assembly of energy-storage battery through two-way combining inverter and the special-purpose power distribution cabinet of little electrical network, and carries out the information interaction scheduling through two-way inverter and microgrid energy management system.
6. the little mains supply of intelligence according to claim 1 and 2 system; It is characterized in that: said load loop is made up of light distribution box, vehicle charging stake, electric distribution system; Feeder assembly via the special-purpose power distribution cabinet of little electrical network links to each other with little electrical network bus, and controlled by EMS through each circuit breaker.
7. the little mains supply of intelligence according to claim 1 and 2 system; It is characterized in that: the information interaction of said EMS in little electrical network is to be realized by secondary circuit; Include in the secondary circuit; Intelligent terminal, background host computer, the background host computer intelligent terminal through each loop is gathered each loop on the inverter in each loop, circuit breaker, current transformer electric current, voltage, generated output, quality of voltage, inverter operating state, tank circuit meritorious, idle and distributed power source discharge and recharge degree.
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee after: Tianjin Electric Power Corp. Patentee after: CEEC TIANJIN ELECTRIC POWER DESIGN INSTITUTE CO., LTD. Patentee after: State Grid Corporation of China Address before: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee before: Tianjin Electric Power Corp. Patentee before: Tianjin Electric Power Design Institute Patentee before: State Grid Corporation of China |