CN102324753A - Energy storage control method of battery energy storage system - Google Patents
Energy storage control method of battery energy storage system Download PDFInfo
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- CN102324753A CN102324753A CN201110274185A CN201110274185A CN102324753A CN 102324753 A CN102324753 A CN 102324753A CN 201110274185 A CN201110274185 A CN 201110274185A CN 201110274185 A CN201110274185 A CN 201110274185A CN 102324753 A CN102324753 A CN 102324753A
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Abstract
The invention provides an energy storage control method of a battery energy storage system. The energy storage control method is used for controlling the grid power supply or charging of the battery energy storage system which is connected on a power supply line, wherein the power supply line is used for supplying power from a power grid to loads of a residential area; and the energy storage control method comprises the following steps of: firstly confirming whether the energy storage system can work in combination with the power grid and whether the power grid is tripped through the self-checking of the battery energy storage system; selecting to combine the energy storage system to the power grid and supply power to the load in a load working mode or a time working mode when the power grid is not tripped; controlling the energy storage system to enter an isolated island working mode and to uninterruptedly supply power to the load of the residential area through existing energy stored when the power grid is detected to be tripped and to lose the capacity of providing power for the load of the residential area; and controlling the energy storage system to perform grid charging in time or to charge and store energy by the time when power consumption is in low valley when the energy storage system stops supplying power to the load. Therefore, the energy storage control method can be used for controlling the battery energy storage system to stably and reliably supply power to the load as required, thereby reducing the peak-valley gap of the power supply load, reducing the idle capacity of a power supply, meeting requirements for peak adjustment, and increasing operating efficiency of a power plant.
Description
Technical field
The present invention relates to a kind of control method, particularly a kind of energy storage control method of battery energy storage system.
Background technology
At present, the China Power load growth is rapid, and the contradiction of power supply and demand has appearred in many areas, and peak load and peak-valley difference increase year by year; Therefore, particularly during meeting the summer in kurtosis winter, peak load often receives the restriction of generating capacity and power grid security, needs rationally to arrange electric load by area and time, and the allotment supply of electric power is alleviated electrical network pressure to make full use of electric energy.
In order to satisfy the growing need for electricity of society now, solve the problem of " electric energy can only instant ", battery energy storage system is just progressively coming into one's own in current network system.Described battery energy storage system discharges electric power through during the electrical network low ebb, absorbing electric energy between load boom period, reduce peak-valley difference, thereby the idle capacity of corresponding minimizing power supply satisfies the peak regulation demand, improves power plant's operational efficiency.Therefore, whether battery energy storage system possesses good effectively operation control device, to the whether reliable and stable very big influence that has of supplying power.
Summary of the invention
The energy storage control method that the purpose of this invention is to provide a kind of reliable and effective battery energy storage system can be controlled energy-storage system and get into the isolated island mode of operation when electrical network trips, can be electric incessantly with existing energy storage energy promptly; Load is supplied power under load operation or the time service pattern and when power system restoration, will switch to rapidly; And, can control energy-storage system and charge immediately or when low power consumption, charge.
In order to achieve the above object; Technical scheme of the present invention provides a kind of energy storage control method of battery energy storage system; Some group storage battery modules that wherein said battery energy storage system is provided with; Through after single-phase circuit breaker, the two-way inverter that is incorporated into the power networks, second circuit breaker, first circuit breaker that is connected to electrical network is on the circuit of cell load power supply successively;
Said control method at first carry out step 1, through System self-test, confirm the energy-storage system work of whether can being incorporated into the power networks, and whether electrical network trips:
If electrical network is tripping operation not, select carry out step 2, make energy-storage system get into the load operation pattern and power to the load; Perhaps, select carry out step 3, energy-storage system entry time mode of operation is powered to the load;
If detect electrical network tripping operation, when losing the power supply capacity to cell load, then carry out step 4, the control energy-storage system gets into the isolated island mode of operation, supplies power to cell load incessantly with existing reserves;
In step 2, step 3 or step 4, if after energy-storage system stops to power to the load, select carry out step 5, control said energy-storage system in the time of the setting charging of being incorporated into the power networks.
Further comprise in the step 1:
Step 1.1, energy-storage system self check: second circuit breaker of controlling the said nearly grid side of two-way inverter that is incorporated into the power networks breaks off; Detect virtual voltage, temperature, the dump energy of energy-storage system battery then, judge its work of whether can being incorporated into the power networks;
When detecting energy-storage system and can be incorporated into the power networks work, carry out step 1.2 again;
Step 1.2, electrical network detect: the voltage of detection of grid, electric current, power, and confirm the actual working state of electrical network, and judge whether electrical network trips.
In the step 2, when energy-storage system gets into the load operation pattern, judge that earlier can energy-storage system provide special time period required load and energy:
If the energy of energy-storage system can satisfy specific work duration, then carry out step 2.1;
Step 2.1, the two-way inverter of being incorporated into the power networks is closed a floodgate be incorporated into the power networks, the control energy-storage system provides required load and energy to cell load; Behind the work duration that reaches setting, stop power supply; The said charging stored energy operation of step 5 is carried out in selection.
If energy-storage system can not provide special time period required load and energy, then carry out step 2.2;
Step 2.2, the actual load energy and the power-on time thereof that can provide energy-storage system are confirmed; Select whether to get into combined floodgate work then:
If select " being ", the power supply of closing a floodgate when the energy storage energy arrives lower limit, is stopped power supply, and selects to carry out the said charging stored energy operation of step 5; If select " denying ", carry out the said charging stored energy operation of step 5.
In the step 3, during energy-storage system entry time mode of operation, judge earlier whether energy-storage system arrives the discharge operating time:, carry out the said charging stored energy operation of step 5 if energy-storage system does not arrive the discharge operating time;
If energy-storage system arrives the discharge operating time, judge further whether it can provide load and energy required under the work duration:, carry out step 3.1.1 if be chosen as " being "; If be chosen as " denying ", carry out step 3.1.2;
Step 3.1.1, be that energy-storage system can provide required load and energy under the work duration, the two-way inverter that is incorporated into the power networks closed a floodgate be incorporated into the power networks that the control energy-storage system provides required load and energy; After reaching the work duration, stop power supply; Carry out the said charging stored energy operation of step 5 this moment.
Step 3.1.2, be energy-storage system when the required load and energy of work duration can not be provided, then its actual load and energy and power-on time thereof that can provide confirmed; Select whether to get into combined floodgate work then:
When selecting to close a floodgate power supply, when arriving energy storage energy lower limit, stop power supply; Select to carry out the said charging stored energy operation of step 5 this moment; Supply power when selecting not close a floodgate, carry out the said charging stored energy operation of step 5.
In the step 4, judge that earlier can energy-storage system supply power to the sub-district: be chosen as " being ", carry out step 4.1, be chosen as " denying ", energy-storage system is not reacted;
Step 4.1, energy-storage system can be supplied power to the sub-district; First circuit breaker that cell load is connected with electrical network breaks off; And second breaker closing of the nearly grid side of two-way inverter that is incorporated into the power networks is incorporated into the power networks, the uninterrupted power supply power supply is carried out in the sub-district by the energy-storage system battery;
When the energy storage energy arrives lower limit, stop power supply, second circuit breaker is broken off, make energy-storage system leave net; If during power system restoration, then control energy-storage system and switch to rapidly under described load operation pattern of step 2 or the described time service pattern of step 3 and carry out work.
Stored energy operation charges described in the step 5; Be after energy-storage system is stopped power supply; Selection makes the energy-storage system charging of being incorporated into the power networks immediately, perhaps selects to make second circuit breaker of combining inverter grid side to break off, and controls the energy-storage system charging of being incorporated into the power networks by the time during low power consumption again.
After energy storage control method control according to the invention, said battery energy storage system can be the community user electric when electric network fault trips incessantly; And when non-fault of electrical network or fault recovery, according to the needs of load or power supply duration, select to power to the load with load operation or time service pattern; Reach down in limited time when arriving power-on time or stored energy capacitance, can select to make the energy-storage system charging of being incorporated into the power networks immediately, charge when perhaps being set in low power consumption; Thereby reduce the peak-valley difference of supply load; Reduce the idle capacity of power supply, satisfy the peak regulation demand, improve power plant's operational efficiency.
Description of drawings
Fig. 1 is a battery energy storage system according to the invention and the schematic block diagram that is connected of electrical network and cell load;
Fig. 2 is the flow chart of the energy storage control method of battery energy storage system according to the invention.
Embodiment
Below in conjunction with description of drawings embodiment of the present invention.
As shown in Figure 1, be battery energy storage system and the schematic block diagram that is connected of electrical network and cell load.Wherein, 10KV electrical network 1 is connected to community user load 5 behind first circuit breaker 4 through the transformer 2 of 800KVA, voltage/current detection device 3, three-phase successively; Said voltage/current detection device 3 is sent to a master control system 6 with its data that record.Battery energy storage system is provided with the battery module 7 of 8 30kWh of series connection, and those battery modules 7 are carried out the device 11,12 of current detecting and voltage detecting, also respectively the data that record is sent to said master control system 6.Said some battery modules 7 are connected to said community user load 5 behind second circuit breaker 10 through single-phase circuit breaker 8, be incorporated into the power networks two-way inverter 9, three-phase more successively; Said single-phase circuit breaker 8, be incorporated into the power networks two-way inverter 9 and second circuit breaker 10 also are connected with said master control system 6 separately, and driven by this master control system 6.
Cooperation is referring to Fig. 1, shown in Figure 2, and wherein Fig. 2 is the flow chart of the energy storage control method of battery energy storage system of the present invention.Said control method comprises following steps:
Step 1, System self-test; Promptly detect, confirm whether energy-storage system can insert sub-district electrical network entering work running status through various quantity of states to energy-storage system and detection of grid 1; Wherein, further include:
Step 1.1, energy-storage system self check: second circuit breaker 10 of controlling the two-way inverter 9 nearly grid side that are incorporated into the power networks breaks off; Detect virtual voltage, temperature, the dump energy of energy-storage system battery then, judge its work of whether can being incorporated into the power networks;
The work if energy-storage system can not be incorporated into the power networks then carry out step 1.1 again; Up to detecting the energy-storage system work of can being incorporated into the power networks, carry out step 1.2 again.
Step 1.2, electrical network detect: the voltage of detection of grid, electric current, power, and confirm the actual working state of electrical network, and judge whether electrical network trips;
If electrical network is tripping operation not, can select to make energy-storage system to get into the load operation pattern, then carry out step 2; Perhaps, can select to make energy-storage system entry time mode of operation, then carry out step 3;
If detect the electrical network tripping operation, then carry out step 4, promptly control energy-storage system and get into the isolated island mode of operation.
Step 2, energy-storage system get into the load operation pattern;
Judge that earlier can energy-storage system provide special time period required load and energy: if be judged as " being ", carry out step 2.1,, then carry out step 2.2 if be judged as " denying ";
Step 2.1, if the energy of energy-storage system can satisfy specific work duration, the two-way inverter 9 that is incorporated into the power networks is closed a floodgate is incorporated into the power networks, the control energy-storage system provides required load and energy to cell load; Behind the work duration that reaches setting, stop power supply; The selection of the energy storage mode of can charging this moment;
Step 2.2, if energy-storage system can not provide special time period required load and energy, then its load and energy that can provide and power-on time thereof are confirmed; Select whether to get into combined floodgate work then:
If select " being " power supply of closing a floodgate; When the energy storage energy arrives lower limit, stop power supply; The selection of the energy storage mode of can charging this moment; If select " denying " selection of the energy storage mode of can charging;
Step 3, energy-storage system entry time mode of operation;
Judge earlier whether energy-storage system arrives the discharge operating time: if be judged as " being ", carry out step 3.1,, then carry out step 3.2 if be judged as " denying ";
Step 3.1, if energy-storage system arrives the discharge operating time, judge further whether it can provide load and energy required under the work duration:
Step 3.1.1, if be chosen as " being ", promptly energy-storage system can provide the required load and energy of work duration, the two-way inverter 9 that is incorporated into the power networks is closed a floodgate is incorporated into the power networks, the control energy-storage system provides required load and energy; After reaching the work duration, stop power supply; The selection of the energy storage mode of can charging this moment;
Step 3.1.2, if be chosen as " deny ", when promptly energy-storage system can not provide the required load and energy of work duration, the load and energy and the power-on time thereof that then can provide its reality were confirmed; Select whether to get into combined floodgate work then:
When selecting to close a floodgate power supply, when arriving energy storage energy lower limit, stop power supply; The selection of the energy storage mode of can charging this moment; Supply power the selection of the energy storage mode of can charging when selecting not close a floodgate;
Step 3.2, if energy-storage system does not arrive discharge operating time, the selection of the energy storage mode of can charging;
Step 4, when electrical network tripping operation, when losing the power supply capacity to community user, need energy-storage system to get into the isolated island mode of operation, cell load is supplied power;
Judge earlier that can energy-storage system supply power to the sub-district: be chosen as " being ", carry out step 4.1, be chosen as " denying ", energy-storage system is not reacted.
Step 4.1, energy-storage system can be supplied power to the sub-district; First circuit breaker 4 that cell load is connected with electrical network breaks off; And second circuit breaker 10 that makes the two-way inverter 9 nearly grid side that are incorporated into the power networks closes a floodgate and is incorporated into the power networks, and by the energy-storage system battery uninterrupted power supply power supply is carried out in the sub-district;
When the energy storage energy arrives lower limit, stop power supply, second circuit breaker 10 is broken off, make energy-storage system leave net; If during power system restoration, control then that energy-storage system switches to load operation pattern (step 2) rapidly or the time service pattern (is carried out work under the step 3).
Step 5, charging energy storage;
In above-mentioned steps 2.1, step 2.2, step 3.1.1, step 3.1.2, step 3.2, step 4.1; After energy-storage system is stopped power supply; The selection of the energy storage mode of can charging, i.e. decision makes the energy-storage system charging of being incorporated into the power networks immediately, perhaps makes second circuit breaker, 10 disconnections of combining inverter 9 grid side; By the time the charging energy storage of being incorporated into the power networks again during special time (for example, low power consumption).
Via said method control, said battery energy storage system can be the community user electric when electric network fault trips incessantly; And when non-fault of electrical network or fault recovery, according to the needs of load or power supply duration, select to power to the load with load operation or time service pattern; Reach down in limited time when arriving power-on time or stored energy capacitance, can select to make the energy-storage system charging of being incorporated into the power networks immediately, charge when perhaps being set in low power consumption; Thereby reduce the peak-valley difference of supply load; Reduce the idle capacity of power supply, satisfy the peak regulation demand, improve power plant's operational efficiency.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (8)
1. the energy storage control method of a battery energy storage system; Some group storage battery modules that wherein said battery energy storage system is provided with; Through after single-phase circuit breaker, the two-way inverter that is incorporated into the power networks, second circuit breaker, first circuit breaker that is connected to electrical network is on the circuit of cell load power supply successively; It is characterized in that,
Said control method at first carry out step 1, through System self-test, confirm the energy-storage system work of whether can being incorporated into the power networks, and whether electrical network trips:
If electrical network is tripping operation not, select carry out step 2, make energy-storage system get into the load operation pattern and power to the load; Perhaps, select carry out step 3, energy-storage system entry time mode of operation is powered to the load;
If detect electrical network tripping operation, when losing the power supply capacity to cell load, then carry out step 4, the control energy-storage system gets into the isolated island mode of operation, supplies power to cell load incessantly with existing reserves;
In step 2, step 3 or step 4, if after energy-storage system stops to power to the load, select carry out step 5, control said energy-storage system in the time of the setting charging of being incorporated into the power networks.
2. the energy storage control method of battery energy storage system according to claim 1 is characterized in that,
Further comprise in the step 1:
Step 1.1, energy-storage system self check: second circuit breaker of controlling the said nearly grid side of two-way inverter that is incorporated into the power networks breaks off; Detect virtual voltage, temperature, the dump energy of energy-storage system battery then, judge its work of whether can being incorporated into the power networks;
When detecting energy-storage system and can be incorporated into the power networks work, carry out step 1.2 again;
Step 1.2, electrical network detect: the voltage of detection of grid, electric current, power, and confirm the actual working state of electrical network, and judge whether electrical network trips.
3. the energy storage control method of battery energy storage system according to claim 1 is characterized in that,
In the step 2, when energy-storage system gets into the load operation pattern, judge that earlier can energy-storage system provide special time period required load and energy:
If the energy of energy-storage system can satisfy specific work duration, then carry out step 2.1;
Step 2.1, the two-way inverter of being incorporated into the power networks is closed a floodgate be incorporated into the power networks, the control energy-storage system provides required load and energy to cell load; Behind the work duration that reaches setting, stop power supply; The said charging stored energy operation of step 5 is carried out in selection.
4. like the energy storage control method of the said battery energy storage system of claim 3, it is characterized in that,
In the step 2,, then carry out step 2.2 if energy-storage system can not provide special time period required load and energy;
Step 2.2, the actual load energy and the power-on time thereof that can provide energy-storage system are confirmed; Select whether to get into combined floodgate work then:
If select " being ", the power supply of closing a floodgate when the energy storage energy arrives lower limit, is stopped power supply, and selects to carry out the said charging stored energy operation of step 5; If select " denying ", carry out the said charging stored energy operation of step 5.
5. the energy storage control method of battery energy storage system according to claim 1 is characterized in that,
In the step 3, during energy-storage system entry time mode of operation, judge earlier whether energy-storage system arrives the discharge operating time:, carry out the said charging stored energy operation of step 5 if energy-storage system does not arrive the discharge operating time;
If energy-storage system arrives the discharge operating time, judge further whether it can provide load and energy required under the work duration:, carry out step 3.1.1 if be chosen as " being "; If be chosen as " denying ", carry out step 3.1.2;
Step 3.1.1, be that energy-storage system can provide required load and energy under the work duration, the two-way inverter that is incorporated into the power networks closed a floodgate be incorporated into the power networks that the control energy-storage system provides required load and energy; After reaching the work duration, stop power supply; Carry out the said charging stored energy operation of step 5 this moment.
6. like the energy storage control method of the said battery energy storage system of claim 6, it is characterized in that,
Step 3.1.2 when promptly energy-storage system can not provide the required load and energy of work duration, then confirms its actual load and energy and power-on time thereof that can provide; Select whether to get into combined floodgate work then:
When selecting to close a floodgate power supply, when arriving energy storage energy lower limit, stop power supply; Select to carry out the said charging stored energy operation of step 5 this moment; Supply power when selecting not close a floodgate, carry out the said charging stored energy operation of step 5.
7. the energy storage control method of battery energy storage system according to claim 1 is characterized in that,
In the step 4, judge that earlier can energy-storage system supply power to the sub-district: be chosen as " being ", carry out step 4.1, be chosen as " denying ", energy-storage system is not reacted;
Step 4.1, energy-storage system can be supplied power to the sub-district; First circuit breaker that cell load is connected with electrical network breaks off; And second breaker closing of the nearly grid side of two-way inverter that is incorporated into the power networks is incorporated into the power networks, the uninterrupted power supply power supply is carried out in the sub-district by the energy-storage system battery;
When the energy storage energy arrives lower limit, stop power supply, second circuit breaker is broken off, make energy-storage system leave net; If during power system restoration, then control energy-storage system and switch to rapidly under described load operation pattern of step 2 or the described time service pattern of step 3 and carry out work.
8. like the energy storage control method of any said battery energy storage system in the claim 1 ~ 7, it is characterized in that,
Stored energy operation charges described in the step 5; Be after energy-storage system is stopped power supply; Selection makes the energy-storage system charging of being incorporated into the power networks immediately, perhaps selects to make second circuit breaker of combining inverter grid side to break off, and controls the energy-storage system charging of being incorporated into the power networks by the time during low power consumption again.
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| CN112086970A (en) * | 2020-09-21 | 2020-12-15 | 广东电网有限责任公司 | Configuration method and device of energy storage power station, electronic equipment and storage medium |
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| CN103580269A (en) * | 2012-07-31 | 2014-02-12 | 周锡卫 | Photovoltaic electricity grid-connected and grid-disconnected duplicate supply system |
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| CN112086970A (en) * | 2020-09-21 | 2020-12-15 | 广东电网有限责任公司 | Configuration method and device of energy storage power station, electronic equipment and storage medium |
| CN112952816A (en) * | 2021-03-10 | 2021-06-11 | 国网江苏综合能源服务有限公司 | Method, system and device for fast accessing and exiting mobile energy storage without power outage |
| CN116780721A (en) * | 2023-08-15 | 2023-09-19 | 成都特隆美储能技术有限公司 | BMS control method for optimizing energy storage battery cluster |
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