CN104377703A - Comprehensive voltage sag treatment device control method based on sensitive user - Google Patents
Comprehensive voltage sag treatment device control method based on sensitive user Download PDFInfo
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- CN104377703A CN104377703A CN201410698240.3A CN201410698240A CN104377703A CN 104377703 A CN104377703 A CN 104377703A CN 201410698240 A CN201410698240 A CN 201410698240A CN 104377703 A CN104377703 A CN 104377703A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a comprehensive voltage sag treatment device control method based on a sensitive user. To solve the voltage sag problem of the sensitive user, different control parameters are adopted for different STATCOM compensation stages, the STATCOM dynamic response characteristic and the stable response characteristic can be effectively improved, a device can stably run, the reactive power can be rapidly responded and offset, the voltage sag problem can be effectively solved, and the sensitive load demand can be met.
Description
Technical field
The present invention relates to a kind of control method of voltage dip abatement equipment, be specifically related to a kind of control method of the voltage dip comprehensive regulation equipment based on sensitive users.
Background technology
Power quality problem is the important directions of electric power system research, and wherein voltage dip is, in power system operation process, power quality problem the most frequently occurs.According to the statistics of U.S.'s DianKeYuan (EPRI), the power quality problem of more than 90% is caused by voltage dip.Voltage dip occurs frequent, and its harm is also very large.In recent years, along with socioeconomic development, user also improves day by day for the requirement of the quality of power supply.Voltage dip can cause some sensitive loads cannot normally to work as precision manufactureing factory, computer, Medical Devices etc., causes huge Socie-economic loss, even threatens to the life security of people.
STATCOM (Static Var Compensator) has quick compensating power, and can not impact devices in system, easy for installation, takes up an area the advantages such as little, becomes the effective scheme administering voltage dip.STATCOM controls as a multivariable nonlinear control system, its control problem is a difficult point always, then main in practical engineering application is at present main with classical PI adjustment (Proportional Integral control ler, proportion adjustment and integral adjustment).Classical PI regulates on the basis considering dynamic characteristic and steady-state characteristic, and provide the optimum configurations of a compromise to meet demand for control, its optimum configurations is arranged mainly for stable operating point, and control end voltage is constant.But when system generation voltage dip, equipment operating point changes, use original state modulator speed comparatively slow, effectively cannot administer voltage dip, sensitive load may be caused normally to work, therefore be necessary to improve this.Variable parameter control method sets up different parameters for different operating point, effectively can improve STATCOM dynamic response process, meet sensitive users demand, the powerful guarantee stable operation of sensitive users.
Summary of the invention
The object of the present invention is to provide a kind of control method of the voltage dip comprehensive regulation equipment based on sensitive users, variable parameter control method is adopted to control STATCOM, different controling parameters is adopted for different STATCOM compensated stages, effectively can improve dynamic response characteristic and steady-state response characteristic, realize response fast, stable operation, and effectively administer voltage dip, meet sensitive load demand.
The technical scheme realizing above-mentioned purpose is:
Based on a control method for the voltage dip comprehensive regulation equipment of sensitive users, described voltage dip comprehensive regulation equipment comprises STATCOM, voltage sensor and pi regulator, and it is characterized in that, described control method comprises the following steps:
Step S1, investigates the line topological of load, parameter, load condition and voltage dip degree, according to the voltage dip degree of load tolerance level and load, determines the compensation capacity of STATCOM and concrete component parameters;
Step S2, is divided into stable operation stage, fast response phase and capacity saturation stage the compensation capacity stage of STATCOM, correspondingly setting the regulating parameter of three cover pi regulators, is correspondingly stable operation parameter A, fast response parameter B and capacity parameter of saturation C;
Step S3, gathers the load voltage of load by voltage sensor, and compares with rated voltage, judges that whether the ratio of the difference of rated voltage and load voltage and rated voltage is more than 3%, if not, carries out step S4, if so, carry out step S5;
Step S4, pi regulator adopts stable operation parameter A to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM carries out capacity compensation to load;
Step S5, judges whether the compensation capacity of STATCOM reaches 95% of rated capacity, if not, carries out step S6, if so, carry out step S7;
Step S6, pi regulator adopts quick response parameter B to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM carries out capacity compensation to load;
Step S7, pi regulator adopts capacity parameter of saturation C to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM carries out capacity compensation to load.
The control method of the above-mentioned voltage dip comprehensive regulation equipment based on sensitive users, wherein, the described STATCOM in described step S5, step S6 and step S7 adopt stagnant chain rate comparatively modulation system capacity compensation is carried out to load.
Realization of the present invention contrasts according to load voltage and rated voltage to obtain through PI controlling unit the reactive power that needs to compensate, when load side generation voltage dip, by the quick output reactive power of control STATCOM, lifting load voltage, effective improvement voltage dip, meets sensitive users demand.Existing STATCOM parameter designing compromise is considered dynamically and steady-state behaviour, and dynamic responding speed is comparatively slow, effectively can not administer voltage dip, sensitive load may be caused normally to work.Not enough for overcoming this, the present invention adopts variable parameter control method to control STATCOM, the compensation of STATCOM is divided into stable operation, fast response, the saturated three phases of capacity, and design three covers different controling parameters A, B, C, adopt different controling parameters for the different operation phase.Compared with prior art, the present invention has following beneficial effect: the present invention is directed to different STATCOM compensated stages and adopt different controling parameters, effectively can improve dynamic response characteristic and steady-state response characteristic, realize response fast, stable operation, and effectively administer voltage dip, meet sensitive load demand.The present invention adopts controling parameters A in stable operation stage, can effective control overhead voltage stabilization.The present invention adopts controling parameters B at quick response phase, can optimize dynamic responding speed, realize the quick compensation of reactive power, reaches the object of response fast.The present invention adopts controling parameters C at capacity saturation stage, can stablize output reactive power, the idle fluctuation avoiding Voltage Drop to bring, and ensures sensitive load stable operation.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the control method of the voltage dip comprehensive regulation equipment based on sensitive users of the present invention;
Fig. 2 is the flow chart of the control method of the voltage dip comprehensive regulation equipment based on sensitive users of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 1, voltage dip comprehensive regulation equipment comprises STATCOM 2, voltage sensor and pi regulator 3, STATCOM 2 and is connected with sensitive users and load 1, and voltage sensor is connected on load 1 circuit, and the load voltage V that voltage sensor senses arrives
fbe connected with pi regulator 3 by multiplier-divider, pi regulator 3 is also connected with STATCOM 2, and pi regulator 3 conversion forms pwm signal, and pwm signal is flowed to STATCOM 2, thus control STATCOM 2 pairs of loads 1 carry out capacity compensation.In Fig. 1, V
fabcfor the three-phase voltage of load, I
cabcfor the three-phase offset current of STATCOM 2, V
reffor rated voltage.
Refer to Fig. 2 again, a kind of control method of the voltage dip comprehensive regulation equipment based on sensitive users, comprises the following steps:
Step S1, investigates the line topological of load 1, parameter, load condition and voltage dip degree, according to the voltage dip degree of load tolerance level and load, determines the compensation capacity of STATCOM 2 and concrete component parameters;
Step S2, is divided into stable operation stage, fast response phase and capacity saturation stage the compensation capacity stage of STATCOM 2, correspondingly setting the regulating parameter of three cover pi regulators 3, is correspondingly stable operation parameter A, fast response parameter B and capacity parameter of saturation C;
Step S3, gathers the load voltage V of load 1 by voltage sensor
f, and with rated voltage V
refrelatively, rated voltage V is judged
refwith load voltage V
fdifference and rated voltage V
refratio whether more than 3%, if not, carry out step S4, if so, carry out step S5;
Step S4, pi regulator 3 adopts stable operation parameter A to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM 2 pairs of loads 1 carry out capacity compensation;
Step S5, judges whether the compensation capacity of STATCOM 2 reaches 95% of rated capacity, if not, carries out step S6, if so, carry out step S7;
Step S6, pi regulator 3 adopts quick response parameter B to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM 2 pairs of loads carry out capacity compensation;
Step S7, pi regulator 3 adopts capacity parameter of saturation C to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM 2 pairs of loads carry out capacity compensation.
Described STATCOM in step S5, step S6 and step S7 adopt stagnant chain rate comparatively modulation system capacity compensation is carried out to load.
In sum, the present invention is directed to sensitive users Problem of Voltage Temporary-Drop, by adopting different controling parameters to different STATCOM compensated stages, effectively can improve STATCOM dynamic response characteristic and steady-state response characteristic, realize equipment stable operation and respond compensating power fast, effectively can administer voltage dip, meet sensitive load demand
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, various conversion or modification can also be made, therefore all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (2)
1., based on the control method of the voltage dip comprehensive regulation equipment of sensitive users, described voltage dip comprehensive regulation equipment comprises STATCOM, voltage sensor and pi regulator, and it is characterized in that, described control method comprises the following steps:
Step S1, investigates the line topological of load, parameter, load condition and voltage dip degree, according to the voltage dip degree of load tolerance level and load, determines the compensation capacity of STATCOM and concrete component parameters;
Step S2, is divided into stable operation stage, fast response phase and capacity saturation stage the compensation capacity stage of STATCOM, correspondingly setting the regulating parameter of three cover pi regulators, is correspondingly stable operation parameter A, fast response parameter B and capacity parameter of saturation C;
Step S3, gathers the load voltage of load by voltage sensor, and compares with rated voltage, judges that whether the ratio of the difference of rated voltage and load voltage and rated voltage is more than 3%, if not, carries out step S4, if so, carry out step S5;
Step S4, pi regulator adopts stable operation parameter A to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM carries out capacity compensation to load;
Step S5, judges whether the compensation capacity of STATCOM reaches 95% of rated capacity, if not, carries out step S6, if so, carry out step S7;
Step S6, pi regulator adopts quick response parameter B to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM carries out capacity compensation to load;
Step S7, pi regulator adopts capacity parameter of saturation C to carry out proportion adjustment and integral adjustment, and conversion formation pwm signal control STATCOM carries out capacity compensation to load.
2. the control method of the voltage dip comprehensive regulation equipment based on sensitive users according to claim 1, it is characterized in that, the described STATCOM in described step S5, step S6 and step S7 adopt stagnant chain rate comparatively modulation system capacity compensation is carried out to load.
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| CN201410698240.3A CN104377703B (en) | 2014-11-27 | 2014-11-27 | Based on the control method of the voltage dip comprehensive regulation equipment of sensitive users |
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| CN201410698240.3A CN104377703B (en) | 2014-11-27 | 2014-11-27 | Based on the control method of the voltage dip comprehensive regulation equipment of sensitive users |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494720A (en) * | 2018-11-19 | 2019-03-19 | 东南大学 | A kind of voltage dip Stochastic prediction method based on Internet communication characteristic |
| CN111222696A (en) * | 2020-01-02 | 2020-06-02 | 深圳供电局有限公司 | Voltage sag treatment optimization method and device, computer equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060282239A1 (en) * | 2005-06-08 | 2006-12-14 | Chang Gung University | Method of setting-up steady state model of VSC-based multi-terminal HVDC transmission system |
| CN102856910A (en) * | 2012-07-31 | 2013-01-02 | 上海交通大学 | Static compensator (STATCOM) control method based on multi-model fuzzy neural network PI |
| CN102856911A (en) * | 2012-09-12 | 2013-01-02 | 清华大学 | Control method for access of dynamic reactive power compensation device to power transmission grid |
| CN103972899A (en) * | 2014-05-15 | 2014-08-06 | 徐州中矿大传动与自动化有限公司 | STATCOM access point voltage compensation method |
| CN104037775A (en) * | 2014-05-14 | 2014-09-10 | 浙江大学 | Short-term-voltage stability control method for electric power system |
-
2014
- 2014-11-27 CN CN201410698240.3A patent/CN104377703B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060282239A1 (en) * | 2005-06-08 | 2006-12-14 | Chang Gung University | Method of setting-up steady state model of VSC-based multi-terminal HVDC transmission system |
| CN102856910A (en) * | 2012-07-31 | 2013-01-02 | 上海交通大学 | Static compensator (STATCOM) control method based on multi-model fuzzy neural network PI |
| CN102856911A (en) * | 2012-09-12 | 2013-01-02 | 清华大学 | Control method for access of dynamic reactive power compensation device to power transmission grid |
| CN104037775A (en) * | 2014-05-14 | 2014-09-10 | 浙江大学 | Short-term-voltage stability control method for electric power system |
| CN103972899A (en) * | 2014-05-15 | 2014-08-06 | 徐州中矿大传动与自动化有限公司 | STATCOM access point voltage compensation method |
Non-Patent Citations (1)
| Title |
|---|
| 袁愿: "应用STATCOM 抑制配电网的电压暂降", 《云南电力技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494720A (en) * | 2018-11-19 | 2019-03-19 | 东南大学 | A kind of voltage dip Stochastic prediction method based on Internet communication characteristic |
| CN111222696A (en) * | 2020-01-02 | 2020-06-02 | 深圳供电局有限公司 | Voltage sag treatment optimization method and device, computer equipment and storage medium |
| CN111222696B (en) * | 2020-01-02 | 2022-07-22 | 深圳供电局有限公司 | Voltage sag treatment optimization method and device, computer equipment and storage medium |
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| CN104377703B (en) | 2016-03-30 |
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