CN105576682A - Reliable operation and management control system for power system - Google Patents
Reliable operation and management control system for power system Download PDFInfo
- Publication number
- CN105576682A CN105576682A CN201610093556.9A CN201610093556A CN105576682A CN 105576682 A CN105576682 A CN 105576682A CN 201610093556 A CN201610093556 A CN 201610093556A CN 105576682 A CN105576682 A CN 105576682A
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- China
- Prior art keywords
- flywheel
- control
- phase
- control system
- management control
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a reliable operation and management control system for a power system. The reliable operation and management control system comprises a rectification power generation unit, a flywheel unit, a load and a control module; commercial electricity supplies direct current to the rectification power generation unit through a controllable rectifier; the direct current sent by the rectification power generation unit is transmitted to a direct-current bus through a main switch, such that power is supplied to the flywheel unit and the load; the flywheel unit is connected onto the direct-current bus in parallel; and the control module controls switching of working modes of the flywheel unit by acquiring working parameters of the system. By means of coordination control of various converters, the system is switched among the various modes; therefore, constant bus voltage is kept; energy balance is realized; and the normal operation of the system is ensured.
Description
Technical field
The invention belongs to microgrid energy administrative skill field, be specifically related to a kind of power system reliability operational management control system.
Background technology
Electrical network scale expanding day, the consequence of power grid accident is also more and more serious, and the reliability of electric power system and risk problem receive increasing concern.Electricity generation system, energy-storage system and load combine by micro-capacitance sensor, by the cooperation between relative control apparatus, simultaneously can provide electric energy and heat energy to user, and can be in good time effectively support bulk power grid, play the effect of the peak load that disappears.But, in the face of the access of micro-capacitance sensor, also impact is also existed to bulk power grid, faces serious voltage quality problem; As high power load switching causes the whole network voltage fluctuation, impact is impacted on power consumption equipment; Advance the electronic power conversion devices such as frequency converter to introduce humorous wave interference to major network, the sensitive loads be incorporated into the power networks is impacted.
Summary of the invention
According to above the deficiencies in the prior art, technical problem to be solved by this invention proposes a kind of power system reliability operational management control system, by the control strategy of layering, top level control and lower floor control, and complete the switching of micro-capacitance sensor between multiple mode of operation.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of power system reliability operational management control system, it is characterized in that, comprise commutator generator group, flywheel unit, load and control module, civil power provides direct current by controlled rectifier to commutator generator group, the direct current that commutator generator group sends is sent to DC bus through master switch, to flywheel unit and load supplying, flywheel unit is parallel on DC bus, and control module is switched by the mode of operation of acquisition system operating parameter control flywheel unit.Described flywheel unit comprises three-phase fully-controlled bridge inverter circuit, DC parallel electric capacity, energy storage motor and flywheel, DC parallel Capacitance parallel connection is on DC bus, three-phase fully-controlled bridge inverter circuit drives energy storage motor, flywheel direct-coupling is on rotor, and each cut-offfing of brachium pontis switching tube of three-phase fully-controlled bridge inverter circuit is controlled by control module.Described control system also comprises three-phase fully-controlled bridge inverter circuit fault diagnosis circuit, the interior joint of each phase of three-phase fully-controlled bridge inverter circuit is connected an operational amplifier by dividing potential drop with current-limiting resistance, the output of operational amplifier connects photoelectrical coupler, on brachium pontis, the output of one of them switching tube switching signal and photoelectrical coupler sends into logic "and" operation device, and the output of photoelectrical coupler is sent into logic "and" operation device with the switching signal of another switching tube and exported after logic " non-".Described commutator generator group comprises DC motor DM, starter, ten two-phase synchronous rectification generator SG and a set of charge of overseeing, controls the central control desk composition of unit operation, DC motor DM excitation winding has been connected adjustable resistance, resistance value can Non-follow control, by regulating motor D M exciting current, realize rotational speed regulation, to drag 12 commutating phase generator SG to rated speed, then by external direct current power supply manual adjustments 12 phase generator SG excitation, to control the direct voltage that generator exports.Described control module comprises sampling conditioning electroplax, master board, power supply plate and display terminal, sampling conditioning electroplax comprises transducer and amplifies modulate circuit, master board includes STM32 and FPGA two pieces of control chips, data sampling, the packing of STM32 control sampling conditioning electroplax are uploaded, DC-AC converts control, FPGA is according to the sensing data collected, and the folding controlling each relay realizes the mode of operation switching of flywheel energy storage system.Described sensor sample data comprises two phase line current of energy storage motor, DC bus-bar voltage and Speed of Reaction Wheels.
Invention beneficial effect is: the present invention, by the cooperation control of each converter, switches, to maintain the constant of busbar voltage, realizes the balance of energy between each pattern, ensures the normal operation of system.
Accompanying drawing explanation
Below the content expressed by this Figure of description and the mark in figure are briefly described:
Fig. 1 is the energy accumulation device for fly wheel structure chart of the specific embodiment of the present invention.
Fig. 2 is the structure chart of the micro-capacitance sensor of the specific embodiment of the present invention.
Fig. 3 is the current transformer fault diagnosis circuit of the specific embodiment of the present invention.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
Micro-capacitance sensor of the present invention adopts flywheel energy storage to regulate power network fluctuation, micro-capacitance sensor comprises commutator generator group, flywheel unit, load and control module composition, Fig. 1 is energy accumulation device for fly wheel structure chart of the present invention, energy accumulation device for fly wheel comprises current transformer, asynchronous machine and flywheel section composition, energy accumulation device for fly wheel is parallel to DC bus, energy storage motor is driven by current transformer, flywheel direct-coupling is on rotor, current transformer adopts three-phase full-controlled bridge topological structure, the two-way flow of energy can be realized, because the designing requirement motor of energy accumulation device for fly wheel possesses stronger momentary overload capacity, longer stable useful life and larger fluctuation of speed scope, select structure simple, easy to maintenance, reliability is strong, the dragon shape asynchronous machine that energy density is high, major diameter steel flywheel can increase moment of inertia, therefore the present invention adopts major diameter steel flywheel.
As shown in Figure 2, be the structure chart of micro-capacitance sensor of the present invention, 380V civil power is converted to direct current by controlled rectifier and exports, and provides 200V direct current to commutator generator group.Commutator generator group is by a DC motor DM, a set of starter (KC
1, KC
2, KC), ten two-phase synchronous rectification generator SG and a set of charge of overseeing, control the central control desk composition of unit operation, DC bus powered to 500V, wherein, DC motor DM excitation winding has been connected adjustable resistance, resistance value can Non-follow control, by regulating motor D M exciting current, realize rotational speed regulation, to drag 12 commutating phase generator SG to rated speed (1500r/min), again by external direct current power supply manual adjustments 12 phase generator SG excitation, to control the direct voltage that generator exports.
The 500V direct current that generator sends is sent to DC bus through rectifier bridge and master switch K1, powers respectively to flywheel asynchronous machine and ohmic load.Flywheel unit is made up of three-phase fully-controlled bridge inverter circuit, DC parallel electric capacity, threephase asynchronous machine and flywheel.Wherein, each cut-offfing of brachium pontis switching tube is controlled by control module.Flywheel is fixed on asynchronous machine rotor axle, adopts SVPWM to control, receives energy storing, when DC bus-bar voltage is fallen, pass energy back direct current net side by fly-wheel diode by 6 switching tubes from direct current net side draught.
Three-phase full-controlled bridge current transformer is because working long hours in high frequency, the condition of high temperature, and flimsy device, in order to determine the abort situation of current transformer, the present invention is provided with fault diagnosis circuit, as shown in Figure 3, for A phase brachium pontis, at T
1under fault, as A phase current i
aduring for positive switching signal, A phase upper and lower bridge arm voltage is all different from normal value.Similar, T
2accident analysis also can obtain the locating information of respective fault, and Fig. 2 is A phase brachium pontis open fault diagnostic circuit.R in figure
1, R
2for divider resistance, for obtaining A phase bridge arm voltage; U
1tL0741 type operational amplifier, for driving optocoupler
with
for fault diagnosis circuit output signal, just can record trouble information after latching, S
a+, S
a-for switching signal.
T during normal operation
1, T
2voltage is
at T
1when there is open fault, work as current i
aduring > 0, switching signal S
a+t can not be made
1conducting, the electric current flowed out from A phase brachium pontis can only pass through T
2backward diode afterflow, now
(U
dcfor DC voltage).Composition graphs 2 is known, now operational amplifier U
1optocoupler U can not be driven
2, u
0export as high level, u
0be ' 1 ', i.e. T after carrying out logic "and" operation with switching signal
1fault diagnosis signal
export as high level; In like manner, at T
2there is open fault and current i
aduring < 0, then
export as high level.Therefore whichever brachium pontis generation open fault, or upper and lower bridge arm is opened a way simultaneously, and this diagnostic circuit can identify the position of fault brachium pontis effectively.
Under flywheel energy storage micro-grid power system can be operated in three kinds of mode of operations, i.e. charge mode, discharge mode and Holdover mode, under charge mode, electrical network is powered to flywheel energy storage system, motor running made by flywheel energy storage motor, current transformer is operated in inverter mode, controls electric energy input, makes flywheel energy storage motor rise to appointment rotating speed.At discharge mode: flywheel energy storage system is to electrical network energy regenerative, and generator operation made by flywheel energy storage motor, and current transformer is operated in rectification state, control electric energy feedback, make flywheel energy storage motor drop to appointment rotating speed.At Holdover mode: fly-wheel motor relies on self inertia to maintain constant-speed operation, is in bypass condition, only absorb least energy to overcome running wastage from electrical network.
Control module hardware circuit comprises sampling conditioning electroplax, master board, power supply plate and display terminal, master board includes STM32 and FPGA two pieces of control cores, sampling conditioning electroplax comprises No. 3 transducers and amplifies modulate circuit, STM32 core mainly achieves the data sampling of two phase line current of asynchronous machine, DC bus-bar voltage and Speed of Reaction Wheels, sampled data packing is uploaded, DC-AC conversion controls function, the output of FPGA control relay switching signal.According to the sensing data collected, the differentiation of completion system mode of operation in STM32, mode of operation is determined, by FSMC bus, concrete control command is delivered to FPGA, carries out concrete order, controls the folding of each relay.By the cooperation that top level control and lower floor control, efficiently can complete the switching between various different working modes, and keep the constant of DC bus-bar voltage.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.The protection range that protection scope of the present invention should limit with claims is as the criterion.
Claims (6)
1. a power system reliability operational management control system, it is characterized in that, comprise commutator generator group, flywheel unit, load and control module, civil power provides direct current by controlled rectifier to commutator generator group, the direct current that commutator generator group sends is sent to DC bus through master switch, to flywheel unit and load supplying, flywheel unit is parallel on DC bus, and control module is switched by the mode of operation of acquisition system operating parameter control flywheel unit.
2. power system reliability operational management control system according to claim 1, it is characterized in that, described flywheel unit comprises three-phase fully-controlled bridge inverter circuit, DC parallel electric capacity, energy storage motor and flywheel, DC parallel Capacitance parallel connection is on DC bus, three-phase fully-controlled bridge inverter circuit drives energy storage motor, flywheel direct-coupling is on rotor, and each cut-offfing of brachium pontis switching tube of three-phase fully-controlled bridge inverter circuit is controlled by control module.
3. power system reliability operational management control system according to claim 2, it is characterized in that, described control system also comprises three-phase fully-controlled bridge inverter circuit fault diagnosis circuit, the interior joint of each phase of three-phase fully-controlled bridge inverter circuit is connected an operational amplifier by dividing potential drop with current-limiting resistance, the output of operational amplifier connects photoelectrical coupler, on brachium pontis, the output of one of them switching tube switching signal and photoelectrical coupler sends into logic "and" operation device, the output of photoelectrical coupler is sent into logic "and" operation device with the switching signal of another switching tube and is exported after logic " non-".
4. power system reliability operational management control system according to claim 1, it is characterized in that, described commutator generator group comprises DC motor DM, starter, ten two-phase synchronous rectification generator SG and a set of charge of overseeings, control the central control desk composition of unit operation, DC motor DM excitation winding has been connected adjustable resistance, resistance value can Non-follow control, by regulating motor D M exciting current, realize rotational speed regulation, to drag 12 commutating phase generator SG to rated speed, again by external direct current power supply manual adjustments 12 phase generator SG excitation, to control the direct voltage that generator exports.
5. power system reliability operational management control system according to claim 1, it is characterized in that, described control module comprises sampling conditioning electroplax, master board, power supply plate and display terminal, sampling conditioning electroplax comprises transducer and amplifies modulate circuit, master board includes STM32 and FPGA two pieces of control chips, data sampling, the packing of STM32 control sampling conditioning electroplax are uploaded, DC-AC converts control, FPGA is according to the sensing data collected, and the folding controlling each relay realizes the mode of operation switching of flywheel energy storage system.
6. power system reliability operational management control system according to claim 1, is characterized in that, described sensor sample data comprises two phase line current of energy storage motor, DC bus-bar voltage and Speed of Reaction Wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093556.9A CN105576682A (en) | 2016-02-19 | 2016-02-19 | Reliable operation and management control system for power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093556.9A CN105576682A (en) | 2016-02-19 | 2016-02-19 | Reliable operation and management control system for power system |
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| CN105576682A true CN105576682A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610093556.9A Pending CN105576682A (en) | 2016-02-19 | 2016-02-19 | Reliable operation and management control system for power system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218426A (en) * | 2016-07-27 | 2016-12-14 | 中车大连机车车辆有限公司 | Diesel locomotive flywheel energy storage system |
| CN108649683A (en) * | 2018-05-21 | 2018-10-12 | 清华四川能源互联网研究院 | Power supply system and operation power system |
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| US20110057444A1 (en) * | 2009-09-04 | 2011-03-10 | Rockwell Automation Technologies, Inc. | Grid fault ride-through for current source converter-based wind energy conversion systems |
| CN101710789A (en) * | 2009-12-03 | 2010-05-19 | 华章电气（桐乡）有限公司 | Megawatt-level permanent magnet direct-drive wind-force generating converter and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218426A (en) * | 2016-07-27 | 2016-12-14 | 中车大连机车车辆有限公司 | Diesel locomotive flywheel energy storage system |
| CN108649683A (en) * | 2018-05-21 | 2018-10-12 | 清华四川能源互联网研究院 | Power supply system and operation power system |
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Application publication date: 20160511 |
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| RJ01 | Rejection of invention patent application after publication |