CN103107556A - Inverter energy adjustment method, inverter and inverter energy adjustment system - Google Patents
Inverter energy adjustment method, inverter and inverter energy adjustment system Download PDFInfo
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- CN103107556A CN103107556A CN2013100192897A CN201310019289A CN103107556A CN 103107556 A CN103107556 A CN 103107556A CN 2013100192897 A CN2013100192897 A CN 2013100192897A CN 201310019289 A CN201310019289 A CN 201310019289A CN 103107556 A CN103107556 A CN 103107556A
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Abstract
The invention provides an inverter energy adjustment method, an inverter and an inverter energy adjustment system. The inverter energy adjustment method includes the steps of receiving electric quantity information which is detected by an electric quantity detection device and flows into a power grid from the electric quantity detection device which is connected with the inverter, and adjusting a maximum power output limiting value of the inverter according to the electric quantity information. By means of the inverter energy adjustment method, the inverter and the inverter energy adjustment system, the purpose that electric energy sent out by the inverter is completely or mostly consumed by loads is achieved, and the effective utilization of energy is achieved.
Description
Technical field
The present invention relates to inversion transformation technique, more particularly, relate to energy adjusting method, inverter and the energy adjusting system thereof of inverter.
Background technology
Inverter is divided into and is incorporated into the power networks and from two kinds, net, wherein the application of grid type inverter (as photovoltaic combining inverter) is more extensive, and the system configuration cost is also relatively low.At present, grid company has index request to the electric power that is connected to the grid, and comprises power factor and harmonic wave etc., electrical network is polluted avoiding; If do not obtain the electrical network license of being incorporated into the power networks, the excrescent electric power sent of inverter does not allow to flow into electrical network, only allow to carry out generating power for their own use of electric power, for this situation, can adopt at present from the net scheme, the energy storage devices such as use storage battery are stored the excrescent electric power that inverter sends, but this can increase the input cost of inverter system undoubtedly, the problem that exists simultaneously capacity usage ratio to reduce.
The inventor finds in realizing process of the present invention: the index request of grid company when being incorporated into the power networks in order to satisfy, consider simultaneously the Cost Problems of inverter system, the electric energy that inverter sends is whole or most to be fallen by load consumption, flows into electrical network, electrical network is impacted as optimum treatment mode to avoid excrescent electric power.Yet, do not have the energy adjusting scheme for the inverter of this processing mode in prior art, therefore be badly in need of at present providing a kind of energy adjusting scheme of inverter, fallen by load consumption thereby the electric energy that can make inverter send is whole or most.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of energy adjusting method, inverter and energy adjusting system of inverter, with realize electric energy that inverter sends all or the overwhelming majority by load consumption, flow into electrical network to avoid excrescent electric power, the purpose that electrical network is impacted.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A kind of energy adjusting method of inverter, described method comprises:
From with electric quantity detection apparatus that described inverter is connected receive the information about power of the detected inflow electrical network of described electric quantity detection apparatus;
Adjust the peak power output limit value of described inverter according to described information about power.
Preferably, the described step of adjusting the peak power output limit value of described inverter according to described information about power specifically comprises:
The electric weight that the information about power of inflow electrical network detected according to described electric quantity detection apparatus, judgement flow into electrical network be on the occasion of or negative value;
If flow into the electric weight of electrical network and be on the occasion of, reduce the peak power output limit value of described inverter.
Preferably, the described step that reduces the peak power output limit value of described inverter specifically comprises:
Whether judgement flows into the electric weight of electrical network greater than first threshold;
If flow into the electric weight of electrical network greater than described first threshold, the peak power output limit value with described inverter reduces the first preset value;
Be not more than described first threshold if flow into the electric weight of electrical network, or after the peak power output limit value of described inverter reduces described the first preset value, judge that whether the electric weight of current inflow electrical network is greater than Second Threshold;
If the electric weight of current inflow electrical network is greater than described Second Threshold, the current peak power output limit value with described inverter reduces the second preset value.
Preferably, whether the described electric weight that judges current inflow electrical network also comprises after the step greater than Second Threshold:
If the electric weight of current inflow electrical network is not more than described Second Threshold, or after the current peak power output of described inverter reduces the second preset value, judge that whether the current peak power output limit value of described inverter is less than default power output minimum value;
If the current peak power output limit value of described inverter is less than default power output minimum value, adjusting the current peak power output limit value of described inverter is described default power output minimum value;
If the current peak power output limit value of described inverter is not less than default power output minimum value, the current peak power output limit value of keeping described inverter is constant.
Preferably, described judgement flow into the electric weight of electrical network be on the occasion of or the step of negative value after also comprise:
If flowing into the electric weight of electrical network is negative value, increase the peak power output limit value of described inverter.
Preferably, the step of the peak power output limit value of the described inverter of described increase specifically comprises:
Whether judgement flows into the electric weight of electrical network less than the 3rd threshold value;
If flow into the electric weight of electrical network less than described the 3rd threshold value, the current peak power output limit value with described inverter increases the 3rd preset value;
Be not less than described the 3rd threshold value if flow into the electric weight of electrical network, or after described the 3rd preset value of the peak power output limit value of described inverter increase, judge that whether the electric weight of current inflow electrical network is less than the 4th threshold value;
If the electric weight of current inflow electrical network is less than described the 4th threshold value, the current peak power output limit value with described inverter increases the 4th preset value.
Preferably, whether the described electric weight that judges current inflow electrical network also comprises after the step less than the 4th threshold value:
If the electric weight of current inflow electrical network is not less than described the 4th threshold value, or after described the 4th preset value of current peak power output limit value increase of described inverter, judge that whether the current peak power output limit value of described inverter is greater than default rated output power;
If the current peak power output limit value of described inverter is greater than default rated output power, adjusting the current peak power output limit value of described inverter is described default rated output power;
If the current peak power output limit value of described inverter is not more than default rated output power, the current peak power output limit value of keeping described inverter is constant.
The embodiment of the present invention also provides a kind of inverter, and described inverter comprises:
The information about power receiver module is used for from the information about power of the detected inflow electrical network of the electric quantity detection apparatus described electric quantity detection apparatus of reception that is connected with described inverter;
Power output limit value adjusting module is used for the peak power output limit value according to the described inverter of described information about power adjustment.
Preferably, described power output limit value adjusting module comprises:
Positive negative value judging unit, be used for according to the electric weight that described information about power judgement flows into electrical network be on the occasion of or negative value;
The first power limit adjustment unit, be used for the electric weight that described positive negative value judgment unit judges flows into electrical network be on the occasion of the time, reduce the peak power output limit value of described inverter.
Preferably, described the first power limit adjustment unit comprises:
The first judgment sub-unit is used for judgement and whether flows into the electric weight of electrical network greater than first threshold;
The first power limit reduces subelement, is used for when judgment result is that of described the first judgment sub-unit is, the peak power output limit value of described inverter is reduced the first preset value;
The second judgment sub-unit, be used in described the first judgment sub-unit when the determination result is NO, or after described the first power limit reduces subelement the peak power output limit value of described inverter is reduced described the first preset value, judge that whether the electric weight of current inflow electrical network is greater than Second Threshold;
The second power limit reduces subelement, is used for when judgment result is that of described the second judgment sub-unit is, the current peak power output limit value of described inverter is reduced the second preset value.
Preferably, described the first power limit adjustment unit also comprises:
The 3rd judgment sub-unit, be used in described the second judgment sub-unit when the determination result is NO, or after described the second power limit reduces subelement the current peak power output limit value of described inverter is reduced described the second preset value, judge that whether the current peak power output limit value of described inverter is less than default power output minimum value;
First adjusts subelement, is used for when judgment result is that of described the 3rd judgment sub-unit is, adjusting the current peak power output limit value of described inverter is described default power output minimum value;
First keeps subelement, is used in described the 3rd judgment sub-unit when the determination result is NO, and the current peak power output limit value of keeping described inverter is constant.
Preferably, described power output limit value adjusting module also comprises:
The second power limit adjustment unit is used for increasing the peak power output of described inverter when the electric weight that described positive negative value judgment unit judges flows into electrical network is negative value.
Preferably, described the second power limit adjustment unit comprises:
The 4th judgment sub-unit is used for when the electric weight that flows into electrical network is negative value, and whether judgement flows into the electric weight of electrical network less than the 3rd threshold value;
The first power limit increases subelement, is used for when judgment result is that of described the 4th judgment sub-unit is, with current peak power output limit value increase the 3rd preset value of described inverter;
The 5th judgment sub-unit, be used in described the 4th judgment sub-unit when the determination result is NO, or after described the 3rd preset value of current peak power output limit value increase of described the first power limit increase subelement with described inverter, judge that whether the electric weight of current inflow electrical network is less than the 4th threshold value;
The second power limit increases subelement, is used for when judgment result is that of described the 5th judgment sub-unit is, with current peak power output limit value increase the 4th preset value of described inverter.
Preferably, described the second power limit adjustment unit also comprises:
The 6th judgment sub-unit, be used in described the 5th judgment sub-unit when the determination result is NO, or after described the 4th preset value of current peak power output limit value increase of described the second power limit increase subelement with described inverter, judge that whether the current peak power output limit value of described inverter is greater than default rated output power;
Second adjusts subelement, is used for when judgment result is that of described the 6th judgment sub-unit is, adjusting the current peak power output limit value of described inverter is described default rated output power;
Second keeps subelement, is used in described the 6th judgment sub-unit when the determination result is NO, and the current peak power output limit value of keeping described inverter is constant.
The embodiment of the present invention also provides a kind of energy adjusting system of inverter, comprising: solar array device, inverter as above, and electric quantity detection apparatus;
Wherein, before described electric quantity detection apparatus is arranged at the input that is incorporated into the power networks of electrical network, for detection of the information about power that flows into electrical network and send described information about power to described inverter, described inverter is adjusted the peak power output limit value of described inverter according to described information about power.
Based on technique scheme, the energy adjusting method of the inverter that the embodiment of the present invention provides, inverter from electric quantity detection apparatus that described inverter is connected receive the information about power of the detected inflow electrical network of described electric quantity detection apparatus, thereby by this information about power, adjust the peak power output limit value of inverter, thereby make electric energy that inverter sends all or the overwhelming majority fallen by load consumption, avoided excrescent electric power to flow into electrical network, the problem that electrical network is impacted.The energy adjusting method of the inverter that the embodiment of the present invention provides realized electric energy that inverter sends all or the overwhelming majority by the purpose of load consumption, realized effective utilization of energy.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of the energy adjusting method of a kind of inverter that Fig. 1 provides for the embodiment of the present invention;
The electric quantity detection apparatus that Fig. 2 provides for the embodiment of the present invention schematic diagram is set;
The method flow diagram of the inverter energy adjusting that Fig. 3 provides for the embodiment of the present invention;
The other method flow chart of the inverter energy adjusting that Fig. 4 provides for the embodiment of the present invention;
The another method flow diagram of the inverter energy adjusting that Fig. 5 provides for the embodiment of the present invention;
A method flow diagram again of the inverter energy adjusting that Fig. 6 provides for the embodiment of the present invention;
The method flow diagram more again of the inverter energy adjusting that Fig. 7 provides for the embodiment of the present invention;
The structured flowchart of the inverter that Fig. 8 provides for the embodiment of the present invention;
The hardware structure diagram of the inverter that Fig. 9 provides for the embodiment of the present invention;
The structured flowchart of the power output limit value adjusting module that Figure 10 provides for the embodiment of the present invention;
The structured flowchart of the first power limit adjustment unit that Figure 11 provides for the embodiment of the present invention;
Another structured flowchart of the first power limit adjustment unit that Figure 12 provides for the embodiment of the present invention;
The structured flowchart of the second power limit adjustment unit that Figure 13 provides for the embodiment of the present invention;
Another structured flowchart of the second power limit adjustment unit that Figure 14 provides for the embodiment of the present invention;
The structural representation of the energy adjusting system of the inverter that Figure 15 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The flow chart of the energy adjusting method of a kind of inverter that Fig. 1 provides for the embodiment of the present invention, the method is applied to inverter, and with reference to Fig. 1, the method can comprise step S100 and step S200.
Step S100, from electric quantity detection apparatus that inverter is connected receive the information about power of the detected inflow electrical network of described electric quantity detection apparatus.
Wherein, electric quantity detection apparatus collection and the transmission of information about power before by the input that is incorporated into the power networks that is arranged at electrical network, the electric quantity detection apparatus sampling flows into the electric weight of electrical network, after obtaining to flow into the charge value of electrical network, carry out the encapsulation combination of data with current value, generate information about power corresponding to this charge value, and this information about power is sent to inverter.Wherein electric quantity detection apparatus arranges schematic diagram with reference to shown in Figure 2.
See also Fig. 2, the electric quantity detection apparatus that provides for the embodiment of the present invention schematic diagram is set, electric quantity detection apparatus is arranged between inverter and electrical network, detect the energy of inverter input electrical network, and the energy of electrical network output, the input that is incorporated into the power networks herein refers to that inverter is to port corresponding to electrical network input energy; After electric quantity detection apparatus detects the electric weight that flows into electrical network, generate corresponding information about power, send this information about power to inverter, so that inverter is realized the energy adjusting method of the inverter that the embodiment of the present invention provides.
Please continue to consult Fig. 1, step S200, adjust the peak power output limit value of described inverter according to described information about power.
Information about power corresponding to electric weight by the inflow electrical network that receives in real time, can control and adjust the peak power output limit value of inverter, thereby make the output electric weight of inverter corresponding with the electric weight of described inflow electrical network, optionally, the adjustment of the peak power output limit value of the inverter that is undertaken by step S200, the electric weight of current inflow electrical network is preferably zero, and the electric weight that flows into electrical network is zero a kind of ideal state that is.
For the embodiment of the present invention, the output electric weight of inverter namely refers to the electric weight of described inflow electrical network is corresponding, if the electric weight of current inflow electrical network is on the occasion of (inverter is inputted electric weight to electrical network), reduce the output electric weight of inverter, the embodiment directly perceived that a kind of output electric weight of inverter reduces namely reduces the peak power output limit value of inverter, and it is zero that the output electric weight that reduces can make the electric weight that flows into electrical network; If the electric weight of current inflow electrical network is negative value (electrical network is outwards exported electric weight, is load supplying), increase the output electric weight of inverter, the embodiment directly perceived that a kind of output electric weight of inverter increases namely increases the peak power output limit value of inverter, the output electric weight that increases should satisfy the power demands of load, and the output electric weight that preferably makes electrical network is zero.
Obviously, the electric weight that the embodiment of the present invention can only be considered current inflow electrical network on the occasion of situation, namely the electric weight of current inflow electrical network be on the occasion of the time, reduce the power output limit value of inverter, it is zero making the electric weight that flows into electrical network.The electric weight that flows into electrical network is negative value, can think a kind of stable state of the electric weight that is incorporated into the power networks.
Certainly, for the embodiment of the present invention, it is ideal that the load electric weight is supplied with by inverter entirely, and therefore when the electric weight that flows into electrical network was negative value, the embodiment of the present invention also can increase the output electric weight limit value of inverter, and the output electric weight that makes electrical network is zero.
The energy adjusting method of the inverter that the embodiment of the present invention provides, flow into the information about power corresponding to electric weight of electrical network by reception, electric quantity detection apparatus collection and the transmission of described information about power before by the input that is incorporated into the power networks that is arranged at electrical network, thereby by this information about power, adjust the peak power output limit value of inverter, make the output electric weight of inverter corresponding with the electric weight of described inflow electrical network, thereby the electric energy that makes inverter send is whole or the overwhelming majority is fallen by load consumption, avoided excrescent electric power to flow into electrical network, the problem that electrical network is impacted.The energy adjusting method of the inverter that the embodiment of the present invention provides realized electric energy that inverter sends all or the overwhelming majority by the purpose of load consumption, realized effective utilization of energy.
Preamble is already described, when the electric weight that flows into electrical network be on the occasion of the time, can be according to the information about power corresponding to electric weight of the inflow electrical network that receives, reduce the peak power output limit value of inverter, make the output electric weight of inverter corresponding with the electric weight of described inflow electrical network, so that the electric weight of current inflow electrical network is zero, the electric weight of the described inflow electrical network of indication herein, when reducing for the peak power output limit value that carries out inverter, the electric weight of corresponding inflow electrical network.Fig. 3 shows the implementation of this situation, the method flow diagram of the inverter energy adjusting that Fig. 3 provides for the embodiment of the present invention, and with reference to Fig. 3, the method can comprise:
Whether the electric weight that step S210, judgement flow into electrical network greater than first threshold, if, execution in step S211, if not, execution in step S212;
Step S211, the peak power output limit value of inverter is reduced the first preset value, execution in step S212;
Step S212, judge current inflow electrical network electric weight whether greater than Second Threshold, if, execution in step S213, if not, process ends;
the electric weight that flows into electrical network is real-time update, for the embodiment of the present invention, if in step S210, the determination result is NO, think that the electric weight of the current inflow electrical network described in step S212 is consistent with the electric weight of the inflow electrical network described in step S210, if but judgment result is that in step S210 is, think that the electric weight of the current inflow electrical network described in step S212 is for reducing the peak power output limit value of inverter the electric weight of inflow electrical network corresponding after the first preset value, change due to the peak power output limit value, the electric weight of inflow electrical network is also deposited change numerically.
Step S213, the current peak power output limit value of inverter is reduced the second preset value.
The mode that the embodiment of the present invention is adjusted by segmentation, peak power output limit value to inverter is adjusted, implement the adjusting of the peak power output limit value of segmentation according to actual conditions, make the power adjustment of inverter more accurate, the first threshold that relates in the embodiment of the present invention, Second Threshold, the first preset value, the second preset value is to select according to the actual inverter system debug, therefore there is no fixed value, and visual concrete operating position arranges.
Optionally, consider the inverter own loss, make inverter keep running status, the peak power output limit value should be less than inverter power output minimum value.To this, Fig. 4 shows the other method flow process of the inverter energy adjusting that the embodiment of the present invention provides, and after in conjunction with Fig. 3 and shown in Figure 4, the determination result is NO at the step S212 of Fig. 3 for method shown in Figure 4, step S213 carries out, also comprises step S214-S216.
Step S214, judge inverter current peak power output limit value whether less than default power output minimum value, if, execution in step S215, if not, execution in step S216;
Step S215, the current peak power output limit value of adjustment inverter are described default power output minimum value;
Step S216, the current peak power output limit value of keeping inverter are constant.
Wherein, the current peak power output limit value of the inverter of keeping is step S214 corresponding peak power output limit value when judging, it may be the peak power output limit value after step S213 adjusts, and may be also the peak power output limit value etc. after step S211 adjusts.
Preamble is already described, when the electric weight that flows into electrical network is negative value, can according to the information about power corresponding to electric weight of the inflow electrical network that receives, increase the peak power output limit value of inverter, making the output electric weight of inverter corresponding with the electric weight of described inflow electrical network, is zero so that flow into the electric weight of electrical network.Fig. 5 shows the implementation of this situation, the another method flow diagram of the inverter energy adjusting that Fig. 5 provides for the embodiment of the present invention, and with reference to Fig. 5, the method can comprise:
Whether the electric weight that step S220, judgement flow into electrical network less than the 3rd threshold value, if, execution in step S221, if not, execution in step S222;
Step S221, the current peak power output limit value of inverter is increased the 3rd preset value;
Step S222, judge current inflow electrical network electric weight whether less than the 4th threshold value, if, execution in step S223, if not, process ends;
Step S223, the current peak power output limit value of inverter is increased the 4th preset value.
The mode that the embodiment of the present invention is adjusted by segmentation, peak power output limit value to inverter is adjusted, implement the adjusting of the peak power output limit value of segmentation according to actual conditions, make the power adjustment of inverter more accurate, the 3rd threshold value that relates in the embodiment of the present invention, the 4th threshold value, the 3rd preset value, the 4th preset value is to select according to the actual inverter system debug, therefore there is no fixed value, and visual concrete operating position arranges.
Optionally, consider that the maximum operate power of inverter is for its rated power, therefore the peak power output limit value should not surpass rated power.To this, Fig. 6 shows a method flow again of the inverter energy adjusting that the embodiment of the present invention provides, and after in conjunction with Fig. 5 and shown in Figure 6, shown in Figure 6 the determination result is NO at the step S222 of Fig. 5, step S223 carries out, also comprises step S224-S226.
Step S224, judge inverter current peak power output limit value whether greater than default rated output power, if, execution in step S225, if not, execution in step S226;
Step S225, the current peak power output limit value of adjustment inverter are described default rated output power;
Step S226, the current peak power output limit value of keeping inverter are constant.
Really, the electric weight that the embodiment of the present invention can consider to flow into electrical network simultaneously on the occasion of with the situation of negative value, the positive negative value of electric weight corresponding to information about power corresponding to electric weight by the inflow electrical network that receives, realize different processing procedures, Fig. 7 shows the method flow more again of inverter energy adjusting that the embodiment of the present invention provides, ginseng Fig. 7, the method can comprise:
Step S201, the electric weight that judgement flows into electrical network according to described information about power be on the occasion of or negative value, if on the occasion of, if execution in step S210 negative value, execution in step S220;
Whether the electric weight that step S210, judgement flow into electrical network greater than first threshold, if, execution in step S211, if not, execution in step S212;
Step S211, the peak power output limit value of inverter is reduced the first preset value, execution in step S212;
Step S212, judge current inflow electrical network electric weight whether greater than Second Threshold, if, execution in step S213, if not, execution in step S214;
Step S213, the current peak power output limit value of inverter is reduced the second preset value, execution in step S214;
Step S214, judge inverter current peak power output limit value whether less than default power output minimum value, if, execution in step S215, if not, execution in step S216;
Step S215, the current peak power output limit value of adjustment inverter are described default power output minimum value;
Step S216, the current peak power output limit value of keeping inverter are constant;
Whether the electric weight that step S220, judgement flow into electrical network less than the 3rd threshold value, if, execution in step S221, if not, execution in step S222;
Step S221, the current peak power output limit value of inverter is increased the 3rd preset value;
Step S222, judge current inflow electrical network electric weight whether less than the 4th threshold value, if, execution in step S223, if not, execution in step S224;
Step S223, the current peak power output limit value of inverter is increased the 4th preset value, execution in step S224;
Step S224, judge inverter current peak power output limit value whether greater than default rated output power, if, execution in step S225, if not, execution in step S226;
Step S225, the current peak power output limit value of adjustment inverter are described default rated output power;
Step S226, the current peak power output limit value of keeping inverter are constant.
The energy adjusting method of the inverter that the embodiment of the present invention provides, information about power corresponding to electric weight by the inflow electrical network that receives, electric quantity detection apparatus collection and the transmission of described information about power before by the input that is incorporated into the power networks that is arranged at electrical network, adjust the peak power output limit value of inverter, make the output electric weight of described inverter corresponding with the electric weight of described inflow electrical network, so that the electric weight of current inflow electrical network is zero, realized electric energy that inverter sends all or the overwhelming majority by the purpose of load consumption.
The below describes the inverter that the embodiment of the present invention provides, and it should be noted that inverter described below is corresponding with the energy adjusting method of above-described inverter, but both cross-references.
The structured flowchart of the inverter that Fig. 8 provides for the embodiment of the present invention, with reference to Fig. 8, inverter can comprise:
Information about power receiver module 100 is used for from the information about power of the detected inflow electrical network of the electric quantity detection apparatus described electric quantity detection apparatus of reception that is connected with described inverter; Wherein, electric quantity detection apparatus collection and the transmission of described information about power before by the input that is incorporated into the power networks that is arranged at electrical network, it is the electric weight that the electric quantity detection apparatus sampling flows into electrical network, after obtaining to flow into the charge value of electrical network, carry out the encapsulation combination of data with this current value, generate information about power corresponding to this charge value, and this information about power is sent to inverter;
Power output limit value adjusting module 110 is used for the peak power output limit value according to the described inverter of described information about power adjustment.
Concrete, can pass through to adjust the peak power output limit value of the inverter circuit in inverter, thereby realize the adjustment of the peak power output limit value of inverter.With reference to Fig. 9, the hardware structure diagram of the inverter that Fig. 9 provides for the embodiment of the present invention comprises controller 21, DC/DC change-over circuit 22, the inverter circuit 23 that is connected with described DC/DC change-over circuit by dc bus; Wherein, information about power receiver module 100 and power output limit value adjusting module 110 can be arranged in controller 21.
Preferably, carry out the adjustment of peak power output limit value of inverter through power output limit value adjusting module 110 after, the output electric weight of described inverter should be corresponding with the electric weight of described inflow electrical network, and the electric weight that makes current inflow electrical network is zero.
Figure 10 shows the structure of power output limit value adjusting module 110, and power output limit value adjusting module 110 can comprise:
Positive negative value judging unit 1101 is used for the information about power corresponding according to the electric weight of described inflow electrical network, the electric weight that judgement flows into electrical network be on the occasion of or negative value;
The first power limit adjustment unit 111, be used for the electric weight that flows into electrical network be on the occasion of the time, reduce the peak power output limit value of inverter according to described information about power, make the output electric weight of inverter corresponding with the electric weight of described inflow electrical network;
The second power limit adjustment unit 112 is used for when the electric weight that flows into electrical network is negative value, according to described information about power, increases the peak power output of inverter, makes the output electric weight of inverter corresponding with the electric weight of described inflow electrical network.
Obviously, power output limit value adjusting module 110 also can comprise the first power limit adjustment unit 111, or in the second power limit adjustment unit 112 one.
Figure 11 shows the structure of the first power limit adjustment unit 111, and the first power limit adjustment unit 111 can comprise:
The first judgment sub-unit 1111, be used for the electric weight that flows into electrical network be on the occasion of the time, whether the electric weight of judgement inflow electrical network greater than first threshold;
The first power limit reduces subelement 1112, is used for when judgment result is that of the first judgment sub-unit 1111 is, the peak power output limit value of inverter is reduced the first preset value;
The second judgment sub-unit 1113, be used in the first judgment sub-unit 1111 when the determination result is NO, or first after power limit reduces subelement 1112 the peak power output limit value of inverter reduced the first preset value, judges that whether the electric weight of current inflow electrical network is greater than Second Threshold;
The second power limit reduces subelement 1114, is used for when judgment result is that of the second judgment sub-unit 1113 is, the current peak power output limit value of inverter is reduced the second preset value.
In conjunction with Figure 11 and Figure 12, Figure 12 shows another structure of the first power limit adjustment unit 111, compares the first power limit adjustment unit 111 shown in Figure 11, and Figure 12 also comprises:
The 3rd judgment sub-unit 1115, be used in the second judgment sub-unit 1113 when the determination result is NO, or second after power limit reduces subelement 1114 the current peak power output limit value of inverter reduced the second preset value, judges that whether the current peak power output limit value of inverter is less than default power output minimum value;
First adjusts subelement 1116, is used for when judgment result is that of the 3rd judgment sub-unit 1115 is, adjusting the current peak power output limit value of inverter is described default power output minimum value;
First keeps subelement 1117, is used in the 3rd judgment sub-unit 1115 when the determination result is NO, and the current peak power output limit value of keeping inverter is constant.
Figure 13 shows the structure of the second power limit adjustment unit 112, and the second power limit adjustment unit 112 can comprise:
The 4th judgment sub-unit 1121 is used for when the electric weight that flows into electrical network is negative value, and whether judgement flows into the electric weight of electrical network less than the 3rd threshold value;
The first power limit increases subelement 1122, is used for when judgment result is that of the 4th judgment sub-unit 1121 is, with current peak power output limit value increase the 3rd preset value of inverter;
The 5th judgment sub-unit 1123, for the determination result is NO in the 4th judgment sub-unit 1121, or after current peak power output limit value increase the 3rd preset value of the first power limit increase subelement 1122 with inverter, judge that whether the electric weight of current inflow electrical network is less than the 4th threshold value;
The second power limit increases subelement 1124, is used for when judgment result is that of the 5th judgment sub-unit 1123 is, with current peak power output limit value increase the 4th preset value of inverter.
In conjunction with Figure 13 and Figure 14, Figure 14 shows another structure of the second power limit adjustment unit 112, compares the second power limit adjustment unit 112 shown in Figure 13, and Figure 14 also comprises:
The 6th judgment sub-unit 1125, be used in the 5th judgment sub-unit 1123 when the determination result is NO, or after current peak power output limit value increase the 4th preset value of the second power limit increase subelement 1124 with inverter, judge that whether the current peak power output limit value of inverter is greater than default rated output power;
Second adjusts subelement 1126, is used for when judgment result is that of the 6th judgment sub-unit 1125 is, adjusting the current peak power output limit value of inverter is described default rated output power;
Second keeps subelement 1127, is used in the 6th judgment sub-unit 1125 when the determination result is NO, and the current peak power output limit value of keeping inverter is constant.
The inverter that the embodiment of the present invention provides has been realized electric energy that inverter sends all or the overwhelming majority is fallen by load consumption, has realized effective utilization of energy.
The energy adjusting system of the inverter that the below provides the embodiment of the present invention is described, and it should be noted that the energy adjusting system of inverter described below and the energy adjusting method of above-described inverter, and inverter is corresponding, but three's cross-reference.。
The structural representation of the energy adjusting system of the inverter that Figure 15 provides for the embodiment of the present invention, with reference to Figure 15, this system can comprise: solar array device 1, inverter 2 and electric quantity detection apparatus 3; Wherein, inverter 2 can comprise: controller 21, DC/DC circuit 22, inverter circuit 23.
Wherein, before electric quantity detection apparatus 3 is arranged at the input that is incorporated into the power networks of electrical network, for detection of the electric weight that flows into electrical network, generates corresponding information about power, and send described information about power to inverter 2;
Electric quantity detection apparatus 3 can be the device that has arbitrarily the electrical measurement function, and it should comprise the electric quantity detecting circuit of detection of grid side electric weight at least, for the treatment of the signal processor that collects electric quantity signal, and is used for the communicating circuit that carries out communication with inverter.
Inverter 2, be used for receiving from electric quantity detection apparatus 3 information about power of the detected inflow electrical network of electric quantity detection apparatus 3, adjust the peak power output limit value of inverter according to described information about power, thereby make the output electric weight of inverter corresponding with the electric weight of described inflow electrical network, the electric weight that preferably makes current inflow electrical network is zero.
Concrete, it can be the information about power of the controller 21 detected inflow electrical networks of the described electric quantity detection apparatus of reception in inverter 2, adjust the peak power output limit value of inverter circuit 23 according to described information about power, thereby realize the purpose of the peak power output limit value of adjustment inverter 2.
The energy adjusting system of the inverter that provides by the embodiment of the present invention, the information about power of the inflow electrical network of electric quantity detection apparatus before with the input that is incorporated into the power networks of the electrical network that detects is transferred to inverter, inverter receives this information about power, adjust the peak power output limit value of described inverter according to described information about power, be zero so that flow into the electric weight of electrical network, realized electric energy that inverter sends all or the overwhelming majority fallen by load consumption, realized effective utilization of energy.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will be not can be by limit value in these embodiment shown in this article, but to meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (15)
1. the energy adjusting method of an inverter, is characterized in that, described method comprises:
From with electric quantity detection apparatus that described inverter is connected receive the information about power of the detected inflow electrical network of described electric quantity detection apparatus;
Adjust the peak power output limit value of described inverter according to described information about power.
2. the energy adjusting method of inverter according to claim 1, is characterized in that, the described step of adjusting the peak power output limit value of described inverter according to described information about power specifically comprises:
The electric weight that the information about power of inflow electrical network detected according to described electric quantity detection apparatus, judgement flow into electrical network be on the occasion of or negative value;
If flow into the electric weight of electrical network and be on the occasion of, reduce the peak power output limit value of described inverter.
3. the energy adjusting method of inverter according to claim 2, is characterized in that, the described step that reduces the peak power output limit value of described inverter specifically comprises:
Whether judgement flows into the electric weight of electrical network greater than first threshold;
If flow into the electric weight of electrical network greater than described first threshold, the peak power output limit value with described inverter reduces the first preset value;
Be not more than described first threshold if flow into the electric weight of electrical network, or after the peak power output limit value of described inverter reduces described the first preset value, judge that whether the electric weight of current inflow electrical network is greater than Second Threshold;
If the electric weight of current inflow electrical network is greater than described Second Threshold, the current peak power output limit value with described inverter reduces the second preset value.
4. the energy adjusting method of inverter according to claim 3, is characterized in that, whether the described electric weight that judges current inflow electrical network also comprises after the step greater than Second Threshold:
If the electric weight of current inflow electrical network is not more than described Second Threshold, or after the current peak power output of described inverter reduces the second preset value, judge that whether the current peak power output limit value of described inverter is less than default power output minimum value;
If the current peak power output limit value of described inverter is less than default power output minimum value, adjusting the current peak power output limit value of described inverter is described default power output minimum value;
If the current peak power output limit value of described inverter is not less than default power output minimum value, the current peak power output limit value of keeping described inverter is constant.
5. the energy adjusting method of inverter according to claim 2, is characterized in that, the electric weight that described judgement flows into electrical network be on the occasion of or the step of negative value after also comprise:
If flowing into the electric weight of electrical network is negative value, increase the peak power output limit value of described inverter.
6. the energy adjusting method of inverter according to claim 5, is characterized in that, the step of the peak power output limit value of the described inverter of described increase specifically comprises:
Whether judgement flows into the electric weight of electrical network less than the 3rd threshold value;
If flow into the electric weight of electrical network less than described the 3rd threshold value, the current peak power output limit value with described inverter increases the 3rd preset value;
Be not less than described the 3rd threshold value if flow into the electric weight of electrical network, or after described the 3rd preset value of the peak power output limit value of described inverter increase, judge that whether the electric weight of current inflow electrical network is less than the 4th threshold value;
If the electric weight of current inflow electrical network is less than described the 4th threshold value, the current peak power output limit value with described inverter increases the 4th preset value.
7. the energy adjusting method of inverter according to claim 6, is characterized in that, whether the described electric weight that judges current inflow electrical network also comprises after the step less than the 4th threshold value:
If the electric weight of current inflow electrical network is not less than described the 4th threshold value, or after described the 4th preset value of current peak power output limit value increase of described inverter, judge that whether the current peak power output limit value of described inverter is greater than default rated output power;
If the current peak power output limit value of described inverter is greater than default rated output power, adjusting the current peak power output limit value of described inverter is described default rated output power;
If the current peak power output limit value of described inverter is not more than default rated output power, the current peak power output limit value of keeping described inverter is constant.
8. an inverter, is characterized in that, described inverter comprises:
The information about power receiver module is used for from the information about power of the detected inflow electrical network of the electric quantity detection apparatus described electric quantity detection apparatus of reception that is connected with described inverter;
Power output limit value adjusting module is used for the peak power output limit value according to the described inverter of described information about power adjustment.
9. inverter according to claim 8, is characterized in that, described power output limit value adjusting module comprises:
Positive negative value judging unit, be used for according to the electric weight that described information about power judgement flows into electrical network be on the occasion of or negative value;
The first power limit adjustment unit, be used for the electric weight that described positive negative value judgment unit judges flows into electrical network be on the occasion of the time, reduce the peak power output limit value of described inverter.
10. inverter according to claim 9, is characterized in that, described the first power limit adjustment unit comprises:
The first judgment sub-unit is used for judgement and whether flows into the electric weight of electrical network greater than first threshold;
The first power limit reduces subelement, is used for when judgment result is that of described the first judgment sub-unit is, the peak power output limit value of described inverter is reduced the first preset value;
The second judgment sub-unit, be used in described the first judgment sub-unit when the determination result is NO, or after described the first power limit reduces subelement the peak power output limit value of described inverter is reduced described the first preset value, judge that whether the electric weight of current inflow electrical network is greater than Second Threshold;
The second power limit reduces subelement, is used for when judgment result is that of described the second judgment sub-unit is, the current peak power output limit value of described inverter is reduced the second preset value.
11. inverter according to claim 10 is characterized in that, described the first power limit adjustment unit also comprises:
The 3rd judgment sub-unit, be used in described the second judgment sub-unit when the determination result is NO, or after described the second power limit reduces subelement the current peak power output limit value of described inverter is reduced described the second preset value, judge that whether the current peak power output limit value of described inverter is less than default power output minimum value;
First adjusts subelement, is used for when judgment result is that of described the 3rd judgment sub-unit is, adjusting the current peak power output limit value of described inverter is described default power output minimum value;
First keeps subelement, is used in described the 3rd judgment sub-unit when the determination result is NO, and the current peak power output limit value of keeping described inverter is constant.
12. inverter according to claim 9 is characterized in that, described power output limit value adjusting module also comprises:
The second power limit adjustment unit is used for increasing the peak power output of described inverter when the electric weight that described positive negative value judgment unit judges flows into electrical network is negative value.
13. inverter described according to right 12 is characterized in that, described the second power limit adjustment unit comprises:
The 4th judgment sub-unit is used for when the electric weight that flows into electrical network is negative value, and whether judgement flows into the electric weight of electrical network less than the 3rd threshold value;
The first power limit increases subelement, is used for when judgment result is that of described the 4th judgment sub-unit is, with current peak power output limit value increase the 3rd preset value of described inverter;
The 5th judgment sub-unit, be used in described the 4th judgment sub-unit when the determination result is NO, or after described the 3rd preset value of current peak power output limit value increase of described the first power limit increase subelement with described inverter, judge that whether the electric weight of current inflow electrical network is less than the 4th threshold value;
The second power limit increases subelement, is used for when judgment result is that of described the 5th judgment sub-unit is, with current peak power output limit value increase the 4th preset value of described inverter.
14. inverter according to claim 13 is characterized in that, described the second power limit adjustment unit also comprises:
The 6th judgment sub-unit, be used in described the 5th judgment sub-unit when the determination result is NO, or after described the 4th preset value of current peak power output limit value increase of described the second power limit increase subelement with described inverter, judge that whether the current peak power output limit value of described inverter is greater than default rated output power;
Second adjusts subelement, is used for when judgment result is that of described the 6th judgment sub-unit is, adjusting the current peak power output limit value of described inverter is described default rated output power;
Second keeps subelement, is used in described the 6th judgment sub-unit when the determination result is NO, and the current peak power output limit value of keeping described inverter is constant.
15. the energy adjusting system of an inverter is characterized in that, comprising: the solar array device, as the described inverter of claim 8-14 any one, and electric quantity detection apparatus;
Wherein, before described electric quantity detection apparatus is arranged at the input that is incorporated into the power networks of electrical network, for detection of the information about power that flows into electrical network and send described information about power to described inverter, described inverter is adjusted the peak power output limit value of described inverter according to described information about power.
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| CN113241789A (en) * | 2021-04-16 | 2021-08-10 | 江苏固德威电源科技股份有限公司 | High-voltage grid-connected anti-reflux method and system for photovoltaic power station |
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