CN104852381A - Mobile shelter monitoring system and battery energy storage system charge and discharge control method - Google Patents
Mobile shelter monitoring system and battery energy storage system charge and discharge control method Download PDFInfo
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- CN104852381A CN104852381A CN201510283833.8A CN201510283833A CN104852381A CN 104852381 A CN104852381 A CN 104852381A CN 201510283833 A CN201510283833 A CN 201510283833A CN 104852381 A CN104852381 A CN 104852381A
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The invention discloses a mobile shelter monitoring system and a battery energy storage system charge and discharge control method. The mobile shelter monitoring system is used for controlling an on-load tap switch of a line voltage regulator through monitoring a bus voltage at the output side, so as to change a no-load voltage ratio of an auto-transformer to realize line on-load automatic voltage regulation and improve a voltage of the tail end of a power distribution network. Meanwhile, the mobile shelter monitoring system is used for monitoring a battery energy storage state, controlling discharge when a battery energy storage system is in a peak load state and charge when the battery energy storage system is in a valley load state, and coordinating operation energy consumption of an energy storage bidirectional converter and the battery energy storage system, so that the safe, stable and reliable operation of the battery energy storage system is ensured on one hand, and the efficiency of the battery energy storage system is improved on the other hand. According to the monitoring system, joint control of the line voltage regulator and the battery energy storage system is realized, the advantage of the battery energy storage system is fully developed, the working range of the line voltage regulator is enlarged, and the problem of overlow voltage of the tail end of the power distribution network is effectively solved.
Description
Technical field
The present invention relates to controlling device or the method and technology field of voltage, particularly relate to a kind of portable shelter supervisory control system and battery energy storage system charge/discharge control method.
Background technology
In recent years, along with the fast development of China's economy, more and more higher requirement is proposed to the power supply capacity of power distribution network and power supply quality.But, because part distribution network line radius of electricity supply is long, in load duty situation, cause the phenomenon occurring that line voltage distribution is too low, be difficult to the requirement meeting power supply quality.
Conventional electrical distribution net modification measures mainly comprises upgrading or newly-built substation transformer, electric line etc., but distribution network transform cost is higher, when load peak-valley difference is larger, easily causes the problems such as electric power resource utilance is low, electric grid investment benefit is low.
For the underproof problem of line voltage distribution, the patent document of China Patent No. 201420134372.9 discloses a kind of distribution line automatic voltage regulator, but this voltage regulator range of regulation is limited, and range of regulation is 30%Un to the maximum, when power distribution network low-voltage is very serious, voltage boosting effect is limited.The patent document of China Patent No. 201410562452.9 discloses a kind of mobile battery energy-storage system and control method thereof of ferric phosphate lithium cell, but its essence is a kind of battery energy storage system, fundamentally can not solve power distribution network end low-voltage problem.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of portable shelter supervisory control system and battery energy storage system charge/discharge control method, this supervisory control system is by monitoring outlet side busbar voltage and mains side voltage, control the circuit voltage regulator in portable shelter and battery energy storage system, thus expand the working range of circuit voltage regulator, effectively solve the too low problem of power distribution network terminal voltage.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of portable shelter supervisory control system, it is characterized in that: described supervisory control system comprises central processing unit, human-computer interaction module, analog acquisition plate, GPRS communication module, power module, voltage acquisition module and current acquisition module, central processing unit is by serial communication interface and human-computer interaction module, analog acquisition plate, frequency converter, GPRS communication module, regulator controller carries out two-way communication, and by Ethernet interface and PCS, (energy is walked around system, PowerConversion System) communication, central processing unit gathers three-phase voltage and the three-phase current of mains side and outlet side bus respectively by voltage acquisition module and current acquisition module, compare with reference voltage, the on load tap changer of control circuit voltage regulator realizes loaded automatic voltage-regulating and controls battery energy storage system carrying out discharge and recharge operation.
Further technical scheme is: the positive and negative electrode frequency converter of analog acquisition plate and battery energy storage system is communicated by serial ports with central processing unit, analog acquisition plate for gathering flow, pressure, temperature, the electrical potential information of battery energy storage system, and by the startup of Frequency Converter Control electrolyte circulating pump, stopping and upconversion operation.
Further technical scheme is: PCS is communicated with central processing unit by Ethernet, and the discharge and recharge according to the charge and discharge control policy control PCS of battery energy storage system runs, and coordinates the operation energy consumption of PCS and battery energy storage system.
Further technical scheme is: human-computer interaction module is communicated with central processing unit by serial ports, and human-computer interaction module is used for for supervisory control system provides friendly human-computer interaction interface.
Further technical scheme is: GPRS communication module is communicated by serial ports with central processing unit, GPRS communication module is communicated by wireless network with backstage, a distant place, for being the running status of operation maintenance personnel transmitting line voltage regulator and battery energy storage system and operation information.
Further technical scheme is: the input terminal voltage of described power module, for exchanging or direct current 220V, exports as+5V ,+12V ,-12V and/or+24V.
Further technical scheme is: described supervisory control system also comprises the debug port by Ethernet interface and central processing unit bidirectional data communication.
Further technical scheme is: described human-computer interaction module is touch-screen.
The invention also discloses a kind of battery energy storage system charge/discharge control method, it is characterized in that described method comprises the steps:
1) supervisory control system monitors the three-phase voltage U of outlet side bus by voltage acquisition module, when three-phase voltage U <Umin (minimum voltage, Minimum Voltage) time, battery energy storage system electric discharge runs, at energy storage SOC (state-of-charge, State of Charge) its discharge power of lower limit, until stop electric discharge time battery energy storage system SOC<SOCmin (minimum state-of-charge, Minimum State of Charge); As three-phase voltage U >Umi n, battery energy storage system charge operation, at its charge power of the higher limit of battery energy storage system SOC, until stop charging time battery energy storage system SOC>SOCmax (maximum state-of-charge, Maximum State ofCharge);
2) during battery energy storage system charge operation, increase charge power command value step by step, when reaching charge power limit value, battery energy storage system charges according to maximum charge power, ensures that battery energy storage system SOC is at run at high level;
3) when battery energy storage system electric discharge runs, increasing discharge power command value step by step, answering the power demand of As soon as possible Promising Policy load, when reaching discharge power limit value, still can not meet the power demand of load, now battery energy storage system discharges according to maximum discharge power.
The beneficial effect that produces of technique scheme is adopted to be: described supervisory control system achieves jointly controlling of circuit voltage regulator and battery energy storage system, give full play to the advantage of battery energy storage system, expand the working range of circuit voltage regulator, efficiently solve the problem that power distribution network terminal voltage is too low.Described method can control battery energy storage system and discharge at peak hours, charge during low ebb load, coordinate the operation energy consumption of energy storage two way convertor and battery energy storage system, ensure that safe, stable, the reliability service of battery energy storage system on the one hand, improve the efficiency of battery energy storage system on the other hand.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the theory diagram of supervisory control system of the present invention;
Fig. 2 is PT (voltage transformer, Voltage transformer), CT (current transformer, Current transformer) installation site schematic diagram on circuit voltage regulator;
Fig. 3 is battery energy storage system charge/discharge control method flow chart in the present invention;
Wherein: 1-mains side, 2-outlet side, 3-circuit voltage regulator, 4-battery energy storage system, 5-load.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
As shown in Figure 1, the invention discloses a kind of portable shelter supervisory control system, described supervisory control system comprises central processing unit, human-computer interaction module, analog acquisition plate, GPRS communication module, power module, voltage acquisition module and current acquisition module, central processing unit is by serial communication interface and human-computer interaction module, analog acquisition plate, frequency converter, GPRS communication module, regulator controller carries out two-way communication, and communicated with PCS by Ethernet interface, central processing unit gathers three-phase voltage and the three-phase current of mains side and outlet side bus respectively by voltage acquisition module and current acquisition module, compare with reference voltage, the on load tap changer of control circuit voltage regulator realizes loaded automatic voltage-regulating and controls battery energy storage system carrying out discharge and recharge operation.
100V or 57.73V that PT secondary side exports is converted to 5V voltage signal by voltage transformation module; 5A or 1A that CT secondary side exports is converted to 5V voltage signal by current transformation module.
Central processing unit is by serial communication interface COM0 and touch panel communication, the operational factor of the three-phase voltage of touch-screen display power supply side and outlet side bus, three-phase current, cell voltage, battery current and battery energy storage system, system alarm information and logout, can carry out the operations such as the startup of battery energy storage system electrolyte circulating pump, stopping and frequency conversion simultaneously.
Central processing unit is by serial communication interface COM1 and analog acquisition board communications, and analog acquisition plate gathers the various non-electrical parameter such as flow, pressure, temperature, current potential of battery energy storage system.
Central processing unit is communicated with battery energy storage both positive and negative polarity frequency converter by serial communication interface COM2 with COM3, controls the operations such as the startup of battery energy storage system electrolyte circulating pump, stopping and frequency conversion.
Central processing unit by serial communication interface COM4 and GPRS module and distant place background communication, for operation maintenance personnel provides running status and the operation information of circuit voltage regulator and battery energy storage system in portable shelter.
Central processing unit is communicated with circuit regulator controller by serial communication interface COM5, by gathering the three-phase voltage of outlet side bus, compare with reference voltage, when outlet side voltage is greater than (or being less than) fiducial value and exceedes allowed band, control on load tap changer and send downshift (or upshift) instruction, thus the no-load voltage ratio of change autotransformer is to realize loaded automatic voltage-regulating.
Central processing unit is communicated by Ethernet NET0 and PCS, and the discharge and recharge according to the three-phase voltage control PCS of outlet side bus runs, and Ethernet NET1 is the debugging interface of supervising device.
Central processing unit provides two-way to control output and starts or stops heating and cooling system, under ensureing that battery energy storage system operates in optimal environmental condition.
Power module adopts the interchange of standard or direct current 220V to input, for supervisory control system provides+5V ,+12V ,-12V ,+24V supply power voltage.
As shown in Figure 2, the circuit voltage regulator 3 that supervisory control system described in the present invention is monitored is connected between mains side 1 and outlet side 2 bus, and battery energy storage system 4 is connected in parallel on load side, and battery energy storage system 4 power and power system capacity are determined according to connect load 5 capacity.PT gathers the three-phase voltage of mains side 1 and outlet side 2 bus, the three-phase current before CT gathers battery energy storage system 4 access point, after outlet side 2 bus.
As shown in Figure 3, in the present invention, also disclose a kind of battery energy storage system charge/discharge control method, it is characterized in that described method comprises the steps:
1) supervisory control system monitors the three-phase voltage U of outlet side bus by voltage acquisition module, as three-phase voltage U <Umin, battery energy storage system electric discharge runs, at its discharge power of the lower limit of energy storage SOC, until stop electric discharge during battery energy storage system SOC<SOCmin; As three-phase voltage U >Umin, battery energy storage system charge operation, at its charge power of the higher limit of battery energy storage system SOC, until stop charging during battery energy storage system SOC>SOCmax;
2) during battery energy storage system charge operation, increase charge power command value step by step, when reaching charge power limit value, battery energy storage system charges according to maximum charge power, ensures that battery energy storage system SOC is at run at high level;
3) when battery energy storage system electric discharge runs, increasing discharge power command value step by step, answering the power demand of As soon as possible Promising Policy load, when reaching discharge power limit value, still can not meet the power demand of load, now battery energy storage system discharges according to maximum discharge power.
Claims (9)
1. a portable shelter supervisory control system, it is characterized in that: described supervisory control system comprises central processing unit, human-computer interaction module, analog acquisition plate, GPRS communication module, power module, voltage acquisition module and current acquisition module, central processing unit is by serial communication interface and human-computer interaction module, analog acquisition plate, frequency converter, GPRS communication module, regulator controller carries out two-way communication, and communicated with PCS by Ethernet interface, central processing unit gathers three-phase voltage and the three-phase current of mains side and outlet side bus respectively by voltage acquisition module and current acquisition module, compare with reference voltage, the on load tap changer of control circuit voltage regulator realizes loaded automatic voltage-regulating and controls battery energy storage system carrying out discharge and recharge operation.
2. portable shelter supervisory control system according to claim 1, it is characterized in that: the positive and negative electrode frequency converter of analog acquisition plate and battery energy storage system is communicated by serial ports with central processing unit, analog acquisition plate for gathering flow, pressure, temperature, the electrical potential information of battery energy storage system, and by the startup of Frequency Converter Control electrolyte circulating pump, stopping and upconversion operation.
3. portable shelter supervisory control system according to claim 1, it is characterized in that: PCS is communicated with central processing unit by Ethernet, discharge and recharge according to the charge and discharge control policy control PCS of battery energy storage system runs, and coordinates the operation energy consumption of PCS and battery energy storage system.
4. portable shelter supervisory control system according to claim 1, is characterized in that: human-computer interaction module is communicated with central processing unit by serial ports, and human-computer interaction module is used for for supervisory control system provides friendly human-computer interaction interface.
5. portable shelter supervisory control system according to claim 1, it is characterized in that: GPRS communication module is communicated by serial ports with central processing unit, GPRS communication module is communicated by wireless network with backstage, a distant place, for being the running status of operation maintenance personnel transmitting line voltage regulator and battery energy storage system and operation information.
6. portable shelter supervisory control system according to claim 1, is characterized in that: the input terminal voltage of described power module, for exchanging or direct current 220V, exports as+5V ,+12V ,-12V and/or+24V.
7. portable shelter supervisory control system according to claim 1, is characterized in that: described supervisory control system also comprises the debug port by Ethernet interface and central processing unit bidirectional data communication.
8. portable shelter supervisory control system according to claim 1, is characterized in that: described human-computer interaction module is touch-screen.
9. a battery energy storage system charge/discharge control method, is characterized in that described method comprises the steps:
1) supervisory control system monitors the three-phase voltage U of outlet side bus by voltage acquisition module, as three-phase voltage U <Umin, battery energy storage system electric discharge runs, at its discharge power of the lower limit of energy storage SOC, until stop electric discharge during battery energy storage system SOC<SOCmin; As three-phase voltage U >Umin, battery energy storage system charge operation, at its charge power of the higher limit of battery energy storage system SOC, until stop charging during battery energy storage system SOC>SOCmax;
2) during battery energy storage system charge operation, increase charge power command value step by step, when reaching charge power limit value, battery energy storage system charges according to maximum charge power, ensures that battery energy storage system SOC is at run at high level;
3) when battery energy storage system electric discharge runs, increasing discharge power command value step by step, answering the power demand of As soon as possible Promising Policy load, when reaching discharge power limit value, still can not meet the power demand of load, now battery energy storage system discharges according to maximum discharge power.
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| CN105811442A (en) * | 2015-09-14 | 2016-07-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Method for realizing live-line access of mobile energy storage system to grid-connected 10kV line |
| CN109586355A (en) * | 2018-10-25 | 2019-04-05 | 深圳市科陆电子科技股份有限公司 | Battery power limit guard method and device |
| CN109814633A (en) * | 2017-11-20 | 2019-05-28 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of extra-high voltage transformer cooler control circuit and its control method |
| JP2021517447A (en) * | 2018-03-08 | 2021-07-15 | サウジ アラビアン オイル カンパニー | Power control system |
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