CN108205715A - Alternating current-direct current mixing micro-capacitance sensor energy management method based on consistency optimization - Google Patents
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Abstract
The invention discloses a kind of alternating current-direct current mixing micro-capacitance sensor energy management methods based on consistency optimization, utilize the basic conception and equal incremental rate criterion of more intelligent consistency algorithms, setting marginal cost function is consistency variable, pass through the energy management for being optimized to lower floor's control and realizing alternating current-direct current mixing micro-capacitance sensor on upper strata, while ensureing to mix micro-capacitance sensor economical operation, the stability of alternating current-direct current mixing micro-capacitance sensor is maintained.Present invention centralized management robustness is poor low with communication security, the processing of interconnection being seldom related to sub- microgrid to the management of alternating current-direct current mixing micro-capacitance sensor simultaneously, micro-capacitance sensor practical operation situation is not met, the robustness and expansibility of alternating current-direct current mixing micro-capacitance sensor are not improved only with point-to-point communication modes, while realistic meaning is had more to the processing mode of sub- microgrid interconnection.
Description
Technical field
The present invention relates to micro-capacitance sensor technical field, particularly a kind of alternating current-direct current mixing micro-capacitance sensor energy based on consistency optimization
Quantity management method.
Background technology
In recent years, with the aggravation of environmental pollution and resource exhaustion problem, high permeability of the distributed generation resource in power grid,
Micro-capacitance sensor comes into being, and alternating current-direct current mixing micro-capacitance sensor is because it has both exchange microgrid and the advantages of direct-current micro-grid, can source interconnection
Application prospect is had more under net background.
The energy management of alternating current-direct current mixing micro-capacitance sensor be alternating current-direct current micro-capacitance sensor operation important link, energy management mode mesh
It is preceding mainly to have rule-based and be based on optimizing both of which：
1. rule-based way to manage：By pre-set rule, distributed generation resource is sent instructions to, so as to make each point
Cloth power supply co-ordination.
2. the way to manage based on optimization：With the economic operation cost of alternating current-direct current mixing micro-capacitance sensor, environmental benefit or society
Benefit is objective optimization, coordinates the output of distributed generation resource by optimization algorithm, makes alternating current-direct current mixing microgrid optimal in target
It is run under shape condition.
Optimum management is because it considers specific economy, social factor, in practical applications more extensively, centralized management side
Formula be at present by the way of more, but with distributed generation resource number gradually increasing, centralized management mode poor robustness,
Therefore point-to-point consistency optimization algorithm has more application prospect.
Invention content
The purpose of the present invention is overcoming above-mentioned the deficiencies in the prior art, provide a kind of based on consistency optimization alternating current-direct current mixing
Microgrid energy design method, this method can carry out economic optimization on the basis of point-to-point communication, coordinate distributed generation resource
Output, with solve concentrate communication modes poor robustness the drawbacks of, improve alternating current-direct current mixing microgrid robustness and expansibility.
The technical solution of the present invention is as follows：
A kind of alternating current-direct current mixing micro-capacitance sensor energy management method based on consistency optimization, the optimization that this method passes through upper strata
The local economic security operation for controlling to ensure micro-capacitance sensor of cooperation, specific implementation step are as follows：
Step 1, the operational mode for distinguishing alternating current-direct current mixing micro-capacitance sensor：The pattern that is incorporated into the power networks or isolated power grid pattern：Pass through
The folding of PCC nodes is monitored, the operational mode of real-time judge alternating current-direct current mixing micro-capacitance sensor switches the control of main convertor
Mode；
The output of each distributed generation resource is coordinated on step 2, the optimum management on upper strata, upper strata based on consistency protocol, specifically
Step is as follows：
2A. calculates the tiny increment λ of each distributed generation resourcei：
2B. calculates the λ optimized based on consistency algorithmi：
In formula：di,jFor the communication weight of unit i and adjacent unit j, fi(k) it is to adjust item, εiFor regulation coefficient；vi,jFor
The adjustment weight coefficient of unit i and adjacent unit j, Pi(k+1) and PDi(k+1) it is actual measurement active power outputs of the unit i at the k+1 moment
With the local active demand of actual measurement.
2C. calculates the output of each distributed generation resource according to the result that consistency algorithm obtains：
Step 3, monitoring exchanges the power of sub- microgrid and the sub- microgrid interconnection of direct current in real time, when tie-line power transmission is more than
During interconnection capacity, secondary coordination optimization is as follows：
3A. monitors the transimission power P of interconnectionAC_DC；
If 3B.Then enable
3C. the active demand of the local load of update：
Exchange sub- microgrid：
The sub- microgrid of direct current：
In formula：N is exchanges sub- microgrid number of unit, and m is the sub- microgrid number of unit of direct current, PDiActive demand for unit i
Measured value.
3D. is based on tiny increment consistency algorithm, and to two, sub- microgrid calculates controllable active power output respectively.
Under step 4, grid-connect mode, tie-line power transmission is monitored, if transimission power meets interconnection capacity, passes through big electricity
The power-balance of alternating current-direct current mixing micro-capacitance sensor is realized in net scheduling；If interconnection overloads, power-balance is realized by cutting off load.
Under isolated network pattern, power-balance problem is distinguished, when demand is excessively high, power-balance is realized by cutting off load.
Step 5, the local adjustment of lower floor's control, realize the voltage and frequency stabilization of alternating current-direct current mixing micro-capacitance sensor, specific to walk
It is rapid as follows：
5A. droop control functions：
Exchange side：F=fn-mP
DC side：V=vn-nP
5B. updates the slope of droop control, when changing output power, exchange side frequency and DC-side Voltage Stabilization：
Exchange is surveyed：Pi(k+1)·mi,k+1=Pi(k)·mi,k
DC side：Pi(k+1)·ni,k+1=Pi(k)·ni,k
Compared with prior art, the beneficial effects of the invention are as follows：
The energy management mode of traditional alternating current-direct current mixing micro-capacitance sensor is mostly centralized management, centralized management robustness it is poor and
Communication security is low, at the same being seldom related to sub- microgrid to the management of alternating current-direct current mixing micro-capacitance sensor interconnection processing, do not meet
Micro-capacitance sensor practical operation situation, the alternating current-direct current mixing micro-capacitance sensor energy management method that use of the invention is optimized based on consistency,
The robustness and expansibility of alternating current-direct current mixing micro-capacitance sensor are not improved only with point-to-point communication modes, while sub- microgrid is joined
The processing mode of winding thread has more realistic meaning.
Description of the drawings
Fig. 1 is alternating current-direct current mixing micro-capacitance sensor structure chart；
Fig. 2 is alternating current-direct current mixing microgrid Communication Graph；
Fig. 3 is that the present invention is based on the flow charts of alternating current-direct current mixing micro-capacitance sensor energy management method that consistency optimizes.
In figure, 1. ac bus, 2. dc bus, 3. bulk power grids, 4. points of common connection, 5. distributed generation resources, 6. loads,
7. AC DC inverter, 8. accumulators, 9. main inverters, 10. DC dc converters
Specific embodiment
To be clearer and more comprehensible the present invention, hereby example is preferably implemented, and attached drawing is coordinated to be described in detail below.
Please referring initially to Fig. 1, Fig. 1 is alternating current-direct current mixing micro-capacitance sensor structure and the selection and communication of communication network figure, i.e. case
The design of network, the configuration of monitoring point, as shown in the figure, ac bus 1. is connected to one with dc bus 2. by main inverter 9.
It rises；Ac bus 1. is connected by points of common connection 4. with bulk power grid 3.；Distributed generation resource 5. and accumulator 8. pass through respectively
AC DC inverter 7. and DC dc converter 10 are connected on ac bus 1. and dc bus 2.；Load 6. directly connects
Enter at distributed generation resource 5., form local load.Fig. 2 is alternating current-direct current mixing microgrid Communication Graph, wherein, 5. distributed generation resources and
8. it is communicated between accumulator using communication relations as shown in phantom in FIG..
Fig. 3 be the present invention is based on the flow chart of alternating current-direct current mixing micro-capacitance sensor energy management method that consistency optimizes, i.e., under
State the process that step 1 arrives step 5：
Step 1, the operational mode for distinguishing alternating current-direct current mixing micro-capacitance sensor：The pattern that is incorporated into the power networks or isolated power grid pattern：Pass through
The folding of PCC nodes is monitored, the operational mode of real-time judge alternating current-direct current mixing micro-capacitance sensor switches the control of main convertor
Mode；
The output of each distributed generation resource is coordinated on step 2, the optimum management on upper strata, upper strata based on consistency protocol, specifically
Step is as follows：
2A. calculates the tiny increment λ of each distributed generation resourcei：
2B. calculates the λ optimized based on consistency algorithmi：
In formula：di,jFor the communication weight of unit i and adjacent unit j, fi(k) it is to adjust item, εiFor regulation coefficient；vi,jFor
The adjustment weight coefficient of unit i and adjacent unit j, Pi(k+1) and PDi(k+1) it is actual measurement active power outputs of the unit i at the k+1 moment
With the local active demand of actual measurement.
2C. calculates the output of each distributed generation resource according to the result that consistency algorithm obtains：
Step 3, monitoring exchanges the power of sub- microgrid and the sub- microgrid interconnection of direct current in real time, when tie-line power transmission is more than
During interconnection capacity, secondary coordination optimization is as follows：
3A. monitors the transimission power P of interconnectionAC_DC；
If 3B.Then enable
The active demand of the local load of 3C. updates：
Exchange sub- microgrid：
The sub- microgrid of direct current：
In formula：N is exchanges sub- microgrid number of unit, and m is the sub- microgrid number of unit of direct current, PDiActive demand for unit i
Measured value.
3D. is based on tiny increment consistency algorithm, and to two, sub- microgrid calculates controllable active power output respectively.
Under step 4, grid-connect mode, tie-line power transmission is monitored, if transimission power meets interconnection capacity, passes through big electricity
The power-balance of alternating current-direct current mixing micro-capacitance sensor is realized in net scheduling；If interconnection overloads, power-balance is realized by cutting off load.
Under isolated network pattern, power-balance problem is distinguished, when demand is excessively high, power-balance is realized by cutting off load.
Step 5, the local adjustment of lower floor's control, realize the voltage and frequency stabilization of alternating current-direct current mixing micro-capacitance sensor, specific to walk
It is rapid as follows：
5A. droop control functions：
Exchange side：F=fn-mP
DC side：V=vn-nP
5B. updates the slope of droop control, when changing output power, exchange side frequency and DC-side Voltage Stabilization：
Exchange is surveyed：Pi(k+1)·mi,k+1=Pi(k)·mi,k
DC side：Pi(k+1)·ni,k+1=Pi(k)·ni,k
The present invention utilizes the basic conception and equal incremental rate criterion of more intelligent consistency algorithms, and setting marginal cost function is
Consistency variable by the energy management for being optimized to lower floor's control and realizing alternating current-direct current mixing micro-capacitance sensor on upper strata, is ensureing to mix
While micro-capacitance sensor economical operation, the stability of alternating current-direct current mixing micro-capacitance sensor is maintained.
It should be noted last that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng
The present invention is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to invention
Technical solution is modified or replaced equivalently, and without departing from the spirit and scope of technical solution of the present invention, should all be covered
In scope of the presently claimed invention.
Claims (4)
1. a kind of alternating current-direct current mixing micro-capacitance sensor energy management method based on consistency optimization, which is characterized in that this method includes
Following steps：
Step 1, the operational mode of discrimination alternating current-direct current mixing micro-capacitance sensor are be incorporated into the power networks pattern or isolated power grid pattern：By to public affairs
The folding of tie point is monitored altogether, and the operational mode of real-time judge alternating current-direct current mixing micro-capacitance sensor switches the control of main convertor
Mode；
Step 2, the optimum management on upper strata：Coordinate the output of each distributed generation resource based on consistency optimization algorithm；
Step 3, monitoring exchanges the power of sub- microgrid and the sub- microgrid interconnection of direct current in real time, when tie-line power transmission is more than contact
During line capacity, secondary coordination optimization is carried out；
Step 4, under grid-connect mode：Tie-line power transmission is monitored, if transimission power meets interconnection capacity, passes through bulk power grid
The power-balance of alternating current-direct current mixing micro-capacitance sensor is realized in scheduling；If interconnection overloads, power-balance is realized by cutting off load；
Under isolated network pattern：It distinguishes power-balance problem, when demand is excessively high, power-balance is realized by cutting off load；
The voltage and frequency stabilization of alternating current-direct current mixing micro-capacitance sensor are realized in step 5, the local adjustment of lower floor's control.
2. the alternating current-direct current mixing micro-capacitance sensor energy management method according to claim 1 based on consistency optimization, feature
It is, the design of the step 2 consistency optimization algorithm specifically comprises the following steps：
2A) calculates the tiny increment λ of each distributed generation resourcei, formula is as follows：
In formula：PiFor the active power output of controllable i, for just when wherein energy storage device discharges, when charging is negative, Ci(Pi) be into
This function, ai、biFor cost coefficient；
The tiny increment λ optimized 2B) is calculated based on consistency algorithmi, formula is as follows：
In formula：di,jFor the communication weight of unit i and adjacent unit j, fi(k) it is to adjust item, εiFor regulation coefficient；vi,jFor unit i
With the adjustment weight coefficient of adjacent unit j, Pi(k+1) for unit i in the actual measurement active power output valve at k+1 moment, PDi(k+1)
It is unit i in the active demand in the local of the actual measurement at k+1 moment；
2C) by the active power output valve of following equation computing unit i：
In formula：The output calculation value for being controllable under without constraints, Pi *(k+1) it is the reality of controllable
Power output value.
3. the alternating current-direct current mixing micro-capacitance sensor energy management method according to claim 1 based on consistency optimization, feature
It is, the secondary coordination optimization specifically comprises the following steps：
3A) monitor the transimission power P of interconnectionAC_DC, that is, sub- microgrid is exchanged to the power of the sub- microgrid transmission of direct current；
If 3B)Then enableWhereinUltimate bearing capacity for interconnection；
3C) update the active demand of local load：
Exchange sub- microgrid：
The sub- microgrid of direct current：
In formula：N is the number of unit for exchanging sub- microgrid, and m is the number of unit of the sub- microgrid of direct current, PDiActive demand for unit i
Measured value；
3D) based on tiny increment consistency algorithm, to two, sub- microgrid calculates controllable active power output respectively.
4. the alternating current-direct current mixing micro-capacitance sensor energy management method according to claim 1 based on consistency optimization, feature
It is, the local adjustment of the step 5 lower floor control, realizes the voltage and frequency stabilization of alternating current-direct current mixing micro-capacitance sensor, specifically
Step is as follows：
5A. droop control functions：
Exchange side：F=fn-mP
DC side：V=vn-nP
In formula：F is the output frequency for exchanging sub- microgrid side controllable, and m is the sagging coefficient of exchange side；V is the sub- microgrid side of direct current
The output voltage of controllable, n are the sagging coefficient of DC side；P is controllable output power；
5B. updates the slope of droop control, when changing output power, exchange side frequency and DC-side Voltage Stabilization：
Exchange is surveyed：Pi(k+1)·mi,k+1=Pi(k)·mi,k
DC side：Pi(k+1)·ni,k+1=Pi(k)·ni,k
In formula：Pi(k) and Pi(k+1) be respectively controllable k moment and k+1 moment active output, mi,kAnd mi,k+1Respectively
Exchange side controllable k moment and the sagging coefficient at k+1 moment, ni,kAnd ni,k+1Respectively DC side controllable k moment and k+
The sagging coefficient at 1 moment.
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| CN109149597A (en) * | 2018-08-07 | 2019-01-04 | 江苏大学 | A kind of flexible temperature control load participation microgrid frequency modulation method based on distributed traction consistency control |
| CN110086192A (en) * | 2019-03-22 | 2019-08-02 | 南方电网科学研究院有限责任公司 | Frequency consistency control method for two-region flexible direct current interconnection system |
| CN112701723A (en) * | 2020-12-22 | 2021-04-23 | 华南理工大学 | Micro-grid economic control system and method for resisting data tampering attack |
| CN117458631A (en) * | 2023-10-26 | 2024-01-26 | 国网湖北省电力有限公司电力科学研究院 | Multi-scene coordination control method for AC/DC hybrid micro-grid group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110086192A (en) * | 2019-03-22 | 2019-08-02 | 南方电网科学研究院有限责任公司 | Frequency consistency control method for two-region flexible direct current interconnection system |
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| CN117458631A (en) * | 2023-10-26 | 2024-01-26 | 国网湖北省电力有限公司电力科学研究院 | Multi-scene coordination control method for AC/DC hybrid micro-grid group |
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