CN112086963B - Virtual damping control method based on bang-bang algorithm - Google Patents
Virtual damping control method based on bang-bang algorithm Download PDFInfo
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- CN112086963B CN112086963B CN202010926053.1A CN202010926053A CN112086963B CN 112086963 B CN112086963 B CN 112086963B CN 202010926053 A CN202010926053 A CN 202010926053A CN 112086963 B CN112086963 B CN 112086963B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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Abstract
The invention relates to a virtual damping control method based on bang-bang algorithm, which comprises the following specific steps: step S1: designing virtual damping according to frequency maximum deviation requirementD pMinimum value of (d); step S2: designing virtual damping according to damping ratio requirementD pMaximum value of (d); step S3: based on virtual dampingD pThe VSG adaptive virtual damping control strategy based on bang-bang control is proposed. When the product of the frequency deviation and the frequency rate of change is of the same sign,D pset to a minimum value; when the product of the frequency deviation and the frequency rate of change is of opposite sign,D pset to the maximum value. The present invention takes full advantage of the variability of the virtual damping to improve the frequency stability of the system. And carrying out stability analysis on the value range of the virtual damping to determine the maximum value and the minimum value of the virtual damping.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a bang-bang algorithm-based virtual damping control method.
Background
With the gradual increase of the permeability of the distributed energy, a new challenge is brought to the stability of the power system. Because the access of new energy can not provide inertial support for the system frequency, the stability of the system can be improved to a certain extent by utilizing a control strategy of a virtual synchronous machine (VSG). The dynamic characteristics of the output power of the virtual synchronous machine are closely related to the virtual inertia. The reasonable setting and control strategy of the virtual damping parameters are important factors for ensuring the safe and stable operation of the system. In a conventional virtual synchronous machine control strategy, the virtual damping is typically a fixed value. Different from a synchronous generator, the control parameters in the virtual synchronous machine system can be adjusted according to actual conditions on the premise of not replacing hardware. Virtual damping is one of the core parameters of a virtual synchronous machine, and the control strategy of a fixed parameter does not fully utilize the variability of the parameter.
Disclosure of Invention
In view of this, the present invention provides a bang-bang algorithm-based virtual damping control method, which makes the virtual damping adaptively change along with the frequency offset of the virtual synchronous machine, and makes full use of the variability of system parameters to improve the system stability.
The invention is realized by adopting the following scheme: a virtual damping control method based on bang-bang algorithm comprises the following steps:
step S1: designing virtual damping D according to frequency maximum deviation requirementpMinimum value of (d);
step S2: designing virtual damping D according to damping ratio requirementpMaximum value of (d);
step S3: based on virtual damping DpThe VSG self-adaptive virtual damping control strategy based on bang-bang control is proposed; when the product of the frequency deviation and the frequency change rate is of the same sign, DpSet to a minimum value; when the product of the frequency deviation and the frequency change rate has opposite signs, DpSet to the maximum value.
Further, the specific content of step S1 is:
setting the maximum deviation of frequency to Δ fmaxWhen the VSG outputs active power which is changed by 90 percent at most (10 percent of adjustment margin is reserved), and the virtual damping minimum value D of the VSGminComprises the following steps:
in the formula: delta PmaxIs the maximum amount of change in the active power output by the VSG.
Further, the specific content of step S2 is:
the second-order system damping ratio zeta range is 0.4-0.8, and the virtual damping maximum value D of the VSG can be obtained according to the requirement of the damping ratio zeta rangemax：
In the formula: zetamaxIs the maximum value of the damping ratio; j is a virtual inertia; k is a radical ofiIs the integral term coefficient in parallel with the damping term.
Further, the specific control strategy of the VSG adaptive virtual inertia described in step S3 is:
bang-bang control means that the virtual damping is taken as the maximum or minimum allowed in a segmented manner in the whole process; when the VSG system has power unbalance and the product of the frequency deviation and the frequency change rate is in the same sign, in order to prevent the output power of the inverter from exceeding the rated capacity, a virtual damping D is adoptedpSet to the minimum value Dmin(ii) a When the product of the frequency deviation and the frequency change rate has different signs, the virtual damping D is used for ensuring that the frequency is recovered to be stable more quicklypIs set to the maximum value Dmax。
From the above analysis, the VSG adaptive virtual damping expression is as follows:
in the formula: omega is the virtual rotor angular velocity; Δ ω is the virtual rotor angular velocity deviation amount.
Compared with the prior art, the invention has the following beneficial effects:
the method fully utilizes the variability of inverter parameters, sets the virtual damping to be the maximum value or the minimum value in different time intervals according to the bang-bang control idea, further reduces the frequency overshoot after disturbance compared with the prior art, and can accelerate the frequency response speed.
Drawings
Fig. 1 is a control block diagram of an active loop of a virtual synchronous generator according to an embodiment of the present invention.
Fig. 2 is a comparison graph of the effect of the output frequency of the virtual synchronous machine under various control methods according to the embodiment of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1, the present embodiment provides a virtual damping control method based on bang-bang algorithm, including the following steps:
step S1: designing virtual damping D according to frequency maximum deviation requirementpMinimum value of (d);
step S2: designing virtual damping D according to damping ratio requirementpMaximum value of (d);
step S3: based on virtual damping DpThe VSG self-adaptive virtual damping control strategy based on bang-bang control is proposed; when the product of the frequency deviation and the frequency change rate is of the same sign, DpSet to a minimum value; when the product of the frequency deviation and the frequency change rate has opposite signs, DpSet to a maximum value.
In this embodiment, the specific content of step S1 is:
setting the maximum deviation of frequency as Δ fmaxIn time, the VSG output active power changes by 90% at most (10% of adjustment margin is reserved), and the virtual damping minimum value D of the VSGminComprises the following steps:
in the formula: delta PmaxIs the maximum amount of change in the active power output by the VSG.
In this embodiment, the specific content of step S2 is:
the second-order system damping ratio zeta range is 0.4-0.8, and VSG can be obtained according to the requirement of the damping ratio zeta rangeMaximum value of virtual damping Dmax：
In the formula: zetamaxIs the maximum value of the damping ratio; j is a virtual inertia; k is a radical ofiIs the integral term coefficient in parallel with the damping term.
In this embodiment, the specific content in step S3 is:
bang-bang control means that the virtual damping is taken as the maximum or minimum allowed in a segmented manner in the whole process; when the VSG system has power unbalance and the product of the frequency deviation and the frequency change rate is in the same sign, in order to prevent the output power of the inverter from exceeding the rated capacity, a virtual damping D is adoptedpSet to the minimum value Dmin(ii) a When the product of the frequency deviation and the frequency change rate has different signs, the virtual damping D is used for ensuring that the frequency is recovered to be stable more quicklypIs set to the maximum value Dmax。
From the above analysis, the VSG adaptive virtual damping expression is as follows:
in the formula: omega is the virtual rotor angular velocity; Δ ω is the virtual rotor angular velocity deviation amount.
Preferably, the following examples are used to illustrate the embodiments.
1) The virtual damping minimum D can be obtained based on the active loop control equation of the virtual synchronous generator, as shown in FIG. 1, and the parameter setting of the system, as shown in Table 1min＝4.5Nm·s·rad-1。
TABLE 1
2) According to the requirement of the damping ratio of the system, the virtual maximum damping value D can be obtainedmax＝25Nm·s·rad-1。
3) The simulation system operates in an island mode, and when the initial time t is 0, the active load is 4 kW; when t is 0.6s, the active load is suddenly increased from 4kW to 8 kW. Under the same simulation conditions, the output frequency simulation results of various control strategies are shown in fig. 2, where strategy a is the method of this embodiment, strategy B is a virtual damping control method based on the frequency change rate, strategy C is a virtual damping control method based on the frequency change rate index, and strategy D is a fixed virtual damping method.
For the strategy A proposed in this embodiment, the maximum frequency offset after disturbance is 0.174Hz, which is reduced by 11.22% with respect to the strategy B, 3.87% with respect to the strategy C, and 12.12% with respect to the strategy D, and the frequency adjustment time is the shortest. Therefore, in the dynamic process of load disturbance, the maximum frequency offset of the control method of the embodiment is minimum, no oscillation and no overshoot exist in the frequency recovery process, the adjustment time is short, and the frequency stability of the system is further improved.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (3)
1. A virtual damping control method based on bang-bang algorithm is characterized in that: the method comprises the following steps:
step S1: designing virtual damping D according to frequency maximum deviation requirementpMinimum value of (d);
step S2: designing virtual damping D according to damping ratio requirementpMaximum value of (d);
step S3: based on virtual damping DpThe VSG self-adaptive virtual damping control strategy based on bang-bang control is proposed; when the product of the frequency deviation and the frequency change rate is of the same sign, DpSet to a minimum value; when the product of the frequency deviation and the frequency change rate has opposite signs, DpSet to a maximum value;
the specific content of step S2 is:
the second-order system damping ratio zeta is in the range of 0.4-0.8,obtaining the virtual maximum damping value D of the VSG according to the requirement of the damping ratio zeta rangemax：
In the formula: ζ represents a unitmaxIs the maximum value of the damping ratio; j is a virtual inertia; k is a radical ofiIs the integral term coefficient in parallel with the damping term.
2. The virtual damping control method based on bang-bang algorithm as claimed in claim 1, wherein: the specific content of step S1 is:
setting the maximum deviation of frequency to Δ fmaxIn time, the VSG output active power changes by 90% at most, 10% of adjustment margin is reserved, and the virtual damping minimum value D of the VSGminComprises the following steps:
in the formula: delta PmaxIs the maximum amount of change in the active power output by the VSG.
3. The virtual damping control method based on bang-bang algorithm as claimed in claim 1, wherein: the specific content in step S3 is:
bang-bang control means that the virtual damping is taken as the maximum or minimum allowed in a segmented manner in the whole process; when the VSG system has power unbalance and the product of the frequency deviation and the frequency change rate is in the same sign, in order to prevent the output power of the inverter from exceeding the rated capacity, a virtual damping D is adoptedpSet to the minimum value Dmin(ii) a When the product of the frequency deviation and the frequency change rate has different signs, the virtual damping D is used for ensuring that the frequency is recovered to be stable more quicklypIs set to the maximum value Dmax；
From the above analysis, the VSG adaptive virtual damping expression is as follows:
in the formula: omega is the virtual rotor angular velocity; Δ ω is the virtual rotor angular velocity deviation amount.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736517A (en) * | 2018-06-14 | 2018-11-02 | 广西电网有限责任公司电力科学研究院 | A kind of inverse distributed power self-adaptive damping control strategy based on VSG |
| CN109861246A (en) * | 2018-12-24 | 2019-06-07 | 燕山大学 | A kind of photovoltaic microgrid dynamic frequency stable control method based on VSG |
| CN109995092A (en) * | 2019-05-20 | 2019-07-09 | 江苏林洋能源股份有限公司 | A kind of virtual synchronous generator control strategy |
| WO2020135904A1 (en) * | 2018-12-28 | 2020-07-02 | Vestas Wind Systems A/S | Virtual synchronous generator with active damping |
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- 2020-09-04 CN CN202010926053.1A patent/CN112086963B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736517A (en) * | 2018-06-14 | 2018-11-02 | 广西电网有限责任公司电力科学研究院 | A kind of inverse distributed power self-adaptive damping control strategy based on VSG |
| CN109861246A (en) * | 2018-12-24 | 2019-06-07 | 燕山大学 | A kind of photovoltaic microgrid dynamic frequency stable control method based on VSG |
| WO2020135904A1 (en) * | 2018-12-28 | 2020-07-02 | Vestas Wind Systems A/S | Virtual synchronous generator with active damping |
| CN109995092A (en) * | 2019-05-20 | 2019-07-09 | 江苏林洋能源股份有限公司 | A kind of virtual synchronous generator control strategy |
Non-Patent Citations (6)
| Title |
|---|
| Adaptive Damping Coefficient Control of Virtual Synchronous Generator of Microgrid Inverter;Yiyang Shao;《2019 29th Australasian Universities Power Engineering Conference (AUPEC)》;20191129;第1-6页 * |
| Adaptive Damping Factor Control Strategy of Inverter Interfaced Distributed Generators Based on Virtual Synchronous Generator Technology;Shuo Liang;《2018 International Conference on Power System Technology (POWERCON)》;20181108;第1-6页 * |
| Power System Stabilization Using Virtual Synchronous Generator With Alternating Moment of Inertia;Jaber Alipoor;《IEEE Journal of Emerging and Selected Topics in Power Electronics》;20141009;第3卷(第2期);第451-458页 * |
| 光伏微网中虚拟同步发电机参数自适应控制策略;殷桂梁等;《电网技术》;20200131;第44卷(第01期);第192-199页 * |
| 基于最优阻尼比虚拟同步发电机的优化控制策略;范亚楠等;《电测与仪表》;20200410;第57卷(第07期);第60-67页 * |
| 辅助风电响应电网一次调频的储能VSG自适应控制策略;李翠萍等;《吉林电力》;20200825;第48卷(第04期);第1-6页 * |
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