CN102496964A - Method for controlling output power of microgrid - Google Patents
Method for controlling output power of microgrid Download PDFInfo
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Abstract
The invention provides a method for controlling output power of a microgrid, which comprises the following steps: collecting a plurality of output power values of a first distributed power source in a first preset time period; performing smooth filtering on the plurality of output power values to obtain a plurality of active expected values which are in one-to-one correspondence with the plurality of output power values; calculating a difference between each of the plurality of output power values and a corresponding active expected value in the plurality of active expected values to obtain a plurality of power control values; correcting the plurality of power control values according to the limit power of the second distributed power source to obtain a plurality of corrected power control values; determining whether the second distributed power source is capable of being charged and/or discharged according to a state of charge of the second distributed power source; and controlling the second distributed power source to be charged or discharged according to the plurality of corrected power control values and the result of determining whether the second distributed power source can be charged and/or discharged within a second predetermined time period. The method can effectively restrain the fluctuation of the output power.
Description
Technical field
The present invention relates to the electrical network field.More particularly, the present invention relates to a kind of microgrid output power control method.
Background technology
Along with petering out and serious environmental pollution day by day of conventional energy resource, increasing attention and development have been obtained in regenerative resource and the distributed power generation technology world in recent years scope.At present, distributed power generation generally be meant generated output at thousands of watts of miniaturizations, modularization, distributing to 50 megawatts, be arranged near the user the small power generation system that is connected to distribution system for user's power supply.Present existing research and practice show; With the distributed power generation energy supplying system with micro power network (MicroGrid; Be called for short microgrid below) form insert big electrical network and be incorporated into the power networks, support each other with big electrical network, be the effective means of performance distributed power generation energy supplying system usefulness.
As one of important composition form of distributed power generation; Microgrid compiles the small-sized electric system of being transported to that forms by distributed power source, energy storage device, energy converter, relevant load, supervisory control system, protection system, power transmitting device etc. usually, is an autonomous system that can realize oneself's control, protection and management.Because microgrid both can pass through power distribution network and the parallel running of large-scale power net; Form the combined operation system of a large-scale power grid and small grids; Also can provide electricity needs, its flexible operational mode to improve the power supply reliability of load side greatly for local load independently; Simultaneously, microgrid inserts electrical network through single-point, can reduce a large amount of small-power distributed power sources and insert behind the electrical networks influence to traditional electrical network.In addition, microgrid small power generations that will disperse, dissimilar sources (distributed power source) power supply that combines can make Miniature Power Unit obtain higher utilization ratio.Under big electrical network normal condition, microgrid needs operation steady in a long-term; And when big electrical network was interfered, microgrid must break away from big electrical network fast, got into and remain in the islet operation state, treat big electric network fault get rid of after auto-parallel operation again.Above-mentioned functions is summarized as: peak load shifting, power are level and smooth, mode switch etc.Realize that the required control mode of these functions is the difficult point of microgrid technology, various countries research team is just continually developing more excellent control method and hardware is formed.
Power output such as the regenerative resource of wind power generation, photovoltaic generation has very strong intermittence, randomness, and the power curve fluctuation is violent, thereby causes the also fluctuation thereupon of power output of microgrid.Therefore in system's control of microgrid, to the regenerative resource output power curve smoothly is one of most important control purpose.
Fig. 1 illustrates a kind of existing microgrid topological structure.
As shown in Figure 1, microgrid comprises distributed power source 101, microgrid load 103.
Distributed power source 101, microgrid load 103 insert bus BUS1.Bus BUS1 is generally the low-voltage alternating-current bus, and voltage between 220V～35KV, links to each other with bus BUS2 through transformer 104 usually.Bus BUS2 is generally the high-voltage alternating bus, can be considered big electrical network, and voltage is usually between 10KV～220KV.
Distributed power source 101 is the violent power supply (for example, the regenerative resource of wind power generation, photovoltaic generation) of output power curve fluctuation.In order to eliminate the power fluctuation of distributed power source 101, adopt filter circuit to come the short-term sudden change amount of the power curve of filtering distributed power source 101 usually.
Yet there is following problem in above-mentioned microgrid output power control method: Whole Response speed slow (not reaching a second level) is not suitable for practical engineering application; Only can in direct current system, carry out direct current power and smoothly control, and can not in AC system, carry out, so be difficult to adapt to the microgrid system that exchanges; Poor with multiple renewable energy power generation fiting effect.
Summary of the invention
The object of the present invention is to provide a kind of microgrid output power control method, thereby effectively reduce the fluctuation of the power output of microgrid.
One aspect of the present invention provides a kind of method of controlling the power output of microgrid; Wherein, Microgrid comprises first distributed power source and second distributed power source, and said method comprises: a plurality of output power values of (a) in first predetermined amount of time, gathering first distributed power source; (b) said a plurality of output power values are carried out smothing filtering, obtain and a plurality of one to one meritorious desired values of said a plurality of output power values; (c) calculate the poor of each output power value and corresponding meritorious desired value in said a plurality of meritorious desired values in said a plurality of output power values, to obtain a plurality of power control values; (d) revise said a plurality of power control value according to the limit power of second distributed power source, to obtain a plurality of corrected output controlling values; (e) confirm according to the state-of-charge of second distributed power source whether second distributed power source can be recharged and/or discharge; (f) in second predetermined amount of time according to said a plurality of corrected output controlling values and the result who confirms whether second distributed power source can be recharged and/or discharge, control second distributed power source and carry out charge or discharge.
Alternatively, can charge, and the corrected output controlling value second distributed power source is charged, and charge power is this corrected output controlling value greater than zero the time at second distributed power source.
Alternatively, can discharge, and the corrected output controlling value second distributed power source is discharged, and discharge power is this corrected output controlling value less than zero the time at second distributed power source.
Alternatively, step (d) comprising: when power control value during greater than the maximum charge performance number of second distributed power source, power control value is modified to said maximum charge performance number; When power control value during, this power control value is modified to said maximum discharge power value less than the maximum discharge power value of second distributed power source; In other cases, power control value is constant.
Alternatively, step (e) comprising: when the state-of-charge of second distributed power source during greater than first threshold, confirm that second distributed power source only can discharge; When the state-of-charge of second distributed power source during, confirm that second distributed power source only can charge less than second threshold value; When the state-of-charge of second distributed power source during, confirm that second distributed power source can charge and discharge smaller or equal to first threshold and more than or equal to second threshold value.
Alternatively, in step (f), second distributed power source discharges or when charging, before the sequential that reaches next corrected output controlling value, keep discharge power or charge power constant controlling according to a corrected output controlling value and said result.
Alternatively, in the time of execution in step (f) in second predetermined amount of time, execution in step (a).
Alternatively, second predetermined amount of time is after first predetermined amount of time.
Alternatively, when being unit when controlling the power output of microgrid with the scheduled duration, the length of first predetermined amount of time and second predetermined amount of time is less than 1/2nd of said scheduled duration.
Alternatively, second distributed power source is an energy-storage travelling wave tube.
Alternatively, said energy-storage travelling wave tube is ultracapacitor or flywheel accumulator.
Can suppress the fluctuation of microgrid power output effectively according to microgrid output power control method of the present invention.In addition, the life-span of employed energy-storage travelling wave tube can greatly be postponed according to microgrid output power control method of the present invention.
Description of drawings
Through the detailed description of carrying out below in conjunction with accompanying drawing, above and other objects of the present invention, characteristics and advantage will become apparent, wherein:
Fig. 1 illustrates a kind of existing microgrid topological structure;
Fig. 2 illustrates according to microgrid topological structure of the present invention;
Fig. 3 illustrates the flow chart according to microgrid output power control method of the present invention.
Embodiment
Below, will exemplary embodiment of the present invention be described more fully with reference to accompanying drawing, exemplary embodiment is shown in the drawings.Yet, can be with many different form exemplifying embodiment property embodiment, and the present invention should not be construed as limited to the exemplary embodiment in this elaboration.On the contrary, thus provide these embodiment disclosure will be thoroughly with complete, and will be fully the scope of exemplary embodiment be conveyed to those skilled in the art.
Fig. 2 illustrates according to microgrid topological structure of the present invention.
As shown in Figure 2, microgrid comprises first distributed power source 101, second distributed power source 102, microgrid load 103.Can see, compare, also comprise second distributed power source 102 according to microgrid of the present invention with microgrid topological structure shown in Figure 1.
First distributed power source 101 is the more violent power supply of output-power fluctuation (for example a, regenerative resource such as wind power generation, photovoltaic generation).Second distributed power source 102 is energy-storage travelling wave tube (for example, ultracapacitor, a flywheel accumulator).
First distributed power source 101, second distributed power source 102, microgrid load 103 insert bus BUS1.Thereby bus BUS1 links to each other with bus BUS2 through transformer 104 and inserts big electrical network.Big electrical network is meant the electrical network with voltage higher than the voltage of microgrid.
Fig. 3 illustrates the flow chart according to microgrid output power control method of the present invention.
In step 301, gather a plurality of output power value P1 of first distributed power source 101 with preset frequency in the section T1 at the fixed time.Should be appreciated that this preset frequency can be understood that the frequency of constant frequency or variation.
In step 302, a plurality of output power values of gathering in step 301 are carried out smothing filtering, obtain and a plurality of one to one meritorious desired value P2 of said a plurality of output power values.
In step 303, calculate the poor of each output power value and corresponding meritorious desired value in said a plurality of output power value, to obtain a plurality of power control value P3.
In step 304, revise said a plurality of power control value P3 according to the limit power of second distributed power source 102, obtain a plurality of corrected output controlling value P4.
Specifically, as power control value P3 during, this power control value is modified to said maximum charge performance number greater than maximum charge performance number (be on the occasion of); As power control value P3 during, this power control value is modified to said maximum discharge power value less than maximum discharge power value (being negative value); In other cases, power control value P3 is constant.
When corrected output controlling value P4 be on the occasion of the time, expression is charged to second distributed power source 102, and charge power is this power control value.When corrected output controlling value P4 was negative value, expression was discharged to second distributed power source 102, and discharge power is this power control value.When corrected output controlling value P4 is zero, second distributed power source 102 is neither charged also do not discharge.
In step 305, confirm according to the state-of-charge (SOC) of second distributed power source 102 second distributed power source 102 has been opened which state in Charging state and the discharge attitude.
Charging state is represented and can be charged to second distributed power source 102.The discharge attitude is represented and can be discharged to second distributed power source 102.
When the state-of-charge of second distributed power source 102 during greater than first threshold, represent that second distributed power source 102 only opened the discharge attitude, be merely able to discharge.
When the state-of-charge of second distributed power source 102 during less than second threshold value, represent that second distributed power source 102 only opened Charging state, be merely able to charge.
When the state-of-charge of second distributed power source 102 during smaller or equal to first threshold and more than or equal to second threshold value, represent that second distributed power source 102 opened Charging state and discharge attitude, can charge and discharge.
Should be appreciated that first threshold is greater than second threshold value.
In step 306; At the fixed time in next the predetermined amount of time T2 after the section T1; According to the sequential of said a plurality of corrected output controlling value P4,, control second distributed power source 102 and carry out charge or discharge according to said a plurality of corrected output controlling value P4 and the state of confirming.
Can know the description of power control value and state according to the front: opened Charging state at second distributed power source 102; And corrected output controlling value P4 is greater than zero the time; Control second distributed power source 102 and charge, and the input power of controlling second distributed power source 102 is said corrected output controlling value P4; Opened the discharge attitude at second distributed power source 102, and corrected output controlling value P4 controls second distributed power source 102 and discharge less than zero the time, and the power output of controlling second distributed power source 102 is said corrected output controlling value P4.
Should be appreciated that the sequential of each corrected output controlling value P4 is with it the sequential of the corresponding output power value P1 that gathers in step 301.In addition, should also be understood that second distributed power source 102 discharges or when charging, before the sequential that reaches next corrected output controlling value P4, discharge or charge power remain unchanged controlling according to a corrected output controlling value P4.
When needs carry out power output control in a plurality of predetermined amount of time; In the time of execution in step in said next predetermined amount of time T2 306; Execution in step 301 in said next predetermined amount of time T2 simultaneously discharges and recharges thereby next the predetermined amount of time T3 at the fixed time after the section T2 controls second distributed power source 102.Like this, come power output is controlled to each predetermined amount of time repeated execution of steps 301-306.
In addition; Possibly exist and (also can be described as assessment cycle with scheduled duration; For example, 0.5 minute to 5 minutes) power output of first distributed power source 101 is carried out smoothly (that is is unit with said scheduled duration, for the cycle; Suppress the sudden change of the power output of first distributed power source 101) situation, this moment above-mentioned predetermined amount of time (also can be described as control cycle) length should be less than 1/2nd of said scheduled duration.
According to Poewr control method of the present invention; Although the control of power output has certain hysteresis quality; But control cycle only be in assessment cycle a part (for example; Power output in two adjacent control cycles all is in the sudden change of rising), therefore still can realize the effectively level and smooth of power on the whole.
Preferably, the length of assessment cycle is the integral multiple of the length of control cycle.
In the present invention; Owing to initiatively open Charging state according to the state-of-charge of energy-storage travelling wave tube and the attitude of discharging; Can only absorbed power under Charging state, under the discharge attitude, can only send power, therefore make energy-storage travelling wave tube work in the better interval of performance; And can be not frequent between discharging and recharging, switch, thereby prolonged life-span of energy-storage travelling wave tube.For example, in to the microgrid system of the ultracapacitor that contains 200kW * 10s and 500kW solar energy power generating in the test, when control cycle is 1 second, assessment cycle is when being 60 seconds, maximum extension 30 times of ultracapacitor life-spans.
Preferably, second distributed power source 102 according to the present invention is ultracapacitor or flywheel accumulator, compares with the energy-storage travelling wave tube of other types, and it is big that ultracapacitor and flywheel accumulator have instantaneous power, discharges and recharges short advantage of time.In the prior art, ultracapacitor, flywheel accumulator can be realized discharging and recharging of direct current or AC energy through power controller and/or inverter are set, and can control the size that charges and discharge power.
The fluctuation of microgrid power output can be suppressed effectively according to microgrid output power control method of the present invention, and the life-span of employed energy-storage travelling wave tube can be postponed.
Although specifically shown and described the present invention with reference to its exemplary embodiment; But it should be appreciated by those skilled in the art; Under the situation of the spirit and scope of the present invention that do not break away from claim and limited, can carry out the various changes on form and the details to it.
Claims (11)
1. method of controlling the power output of microgrid, wherein, microgrid comprises first distributed power source and second distributed power source, said method comprises:
(a) a plurality of output power values of collection first distributed power source in first predetermined amount of time;
(b) said a plurality of output power values are carried out smothing filtering, obtain and a plurality of one to one meritorious desired values of said a plurality of output power values;
(c) calculate the poor of each output power value and corresponding meritorious desired value in said a plurality of meritorious desired values in said a plurality of output power values, to obtain a plurality of power control values;
(d) revise said a plurality of power control value according to the limit power of second distributed power source, to obtain a plurality of corrected output controlling values;
(e) confirm according to the state-of-charge of second distributed power source whether second distributed power source can be recharged and/or discharge;
(f) in second predetermined amount of time according to said a plurality of corrected output controlling values and the result who confirms whether second distributed power source can be recharged and/or discharge, control second distributed power source and carry out charge or discharge.
2. method according to claim 1 wherein, can be charged at second distributed power source, and the corrected output controlling value second distributed power source is charged, and charge power is this corrected output controlling value greater than zero the time.
3. method according to claim 1 wherein, can be discharged at second distributed power source, and the corrected output controlling value second distributed power source is discharged, and discharge power is this corrected output controlling value less than zero the time.
4. method according to claim 1, wherein, step (d) comprising:
When power control value during, power control value is modified to said maximum charge performance number greater than the maximum charge performance number of second distributed power source;
When power control value during, this power control value is modified to said maximum discharge power value less than the maximum discharge power value of second distributed power source;
In other cases, power control value is constant.
5. method according to claim 1, wherein, step (e) comprising:
When the state-of-charge of second distributed power source during, confirm that second distributed power source only can discharge greater than first threshold;
When the state-of-charge of second distributed power source during, confirm that second distributed power source only can charge less than second threshold value;
When the state-of-charge of second distributed power source during, confirm that second distributed power source can charge and discharge smaller or equal to first threshold and more than or equal to second threshold value.
6. method according to claim 1; Wherein, in step (f), controlling according to a corrected output controlling value and said result that second distributed power source discharges or when charging; Before the sequential that reaches next corrected output controlling value, keep discharge power or charge power constant.
7. method according to claim 1, wherein, in the time of execution in step (f) in second predetermined amount of time, execution in step (a).
8. method according to claim 1, wherein, second predetermined amount of time is after first predetermined amount of time.
9. method according to claim 1, wherein, when being unit when controlling the power output of microgrid with the scheduled duration, the length of first predetermined amount of time and second predetermined amount of time is less than 1/2nd of said scheduled duration.
10. method according to claim 1, wherein, second distributed power source is an energy-storage travelling wave tube.
11. method according to claim 10, wherein, said energy-storage travelling wave tube is ultracapacitor or flywheel accumulator.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593873A (en) * | 2012-03-06 | 2012-07-18 | 天津大学 | Slide control method for power fluctuation of microgrid interconnection line |
| CN103280878A (en) * | 2013-05-13 | 2013-09-04 | 中联重科股份有限公司 | Control method and device of hybrid power supply device, power supply system and equipment |
| CN110758178A (en) * | 2019-09-24 | 2020-02-07 | 安徽力高新能源技术有限公司 | Method for switching effective discharge power during running of new energy automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002017044A (en) * | 2000-06-30 | 2002-01-18 | Kansai Electric Power Co Inc:The | Power fluctuation smoothing apparatus and method for controlling distributed power supply system comprising the same |
| CN101917014A (en) * | 2010-08-20 | 2010-12-15 | 河海大学 | Accumulator charging and discharging control method for smoothening power fluctuation of wind power station |
| CN102104251A (en) * | 2011-02-24 | 2011-06-22 | 浙江大学 | Microgrid real-time energy optimizing and scheduling method in parallel running mode |
-
2011
- 2011-11-25 CN CN201110382160.3A patent/CN102496964B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002017044A (en) * | 2000-06-30 | 2002-01-18 | Kansai Electric Power Co Inc:The | Power fluctuation smoothing apparatus and method for controlling distributed power supply system comprising the same |
| CN101917014A (en) * | 2010-08-20 | 2010-12-15 | 河海大学 | Accumulator charging and discharging control method for smoothening power fluctuation of wind power station |
| CN102104251A (en) * | 2011-02-24 | 2011-06-22 | 浙江大学 | Microgrid real-time energy optimizing and scheduling method in parallel running mode |
Non-Patent Citations (1)
| Title |
|---|
| 宇航: "利用储能系统平抑风电功率波动的仿真研究", 《中国优秀硕士学位论文全文数据库》, 31 December 2010 (2010-12-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593873A (en) * | 2012-03-06 | 2012-07-18 | 天津大学 | Slide control method for power fluctuation of microgrid interconnection line |
| CN103280878A (en) * | 2013-05-13 | 2013-09-04 | 中联重科股份有限公司 | Control method and device of hybrid power supply device, power supply system and equipment |
| CN103280878B (en) * | 2013-05-13 | 2015-05-20 | 中联重科股份有限公司 | Control method and device of hybrid power supply device, power supply system and equipment |
| CN110758178A (en) * | 2019-09-24 | 2020-02-07 | 安徽力高新能源技术有限公司 | Method for switching effective discharge power during running of new energy automobile |
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Effective date of registration: 20151230 Address after: 100176 Beijing economic and Technological Development Zone, Beijing, Kangding street, No. 19, No. Patentee after: Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd Patentee after: State Grid Xinyuan Zhangjiakou Scenery Storage Demonstration Power Plant Co., Ltd. Address before: 100176 Beijing economic and Technological Development Zone, Beijing, Kangding street, No. 19, No. Patentee before: Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd |