CN103928933A - Distributed power supply reactive power control method for reducing voltage disturbance of power distribution network - Google Patents
Distributed power supply reactive power control method for reducing voltage disturbance of power distribution network Download PDFInfo
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- CN103928933A CN103928933A CN201410137656.8A CN201410137656A CN103928933A CN 103928933 A CN103928933 A CN 103928933A CN 201410137656 A CN201410137656 A CN 201410137656A CN 103928933 A CN103928933 A CN 103928933A
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- arccos
- tan
- distributed power
- power source
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010248 power generation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
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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 provides a distributed power supply reactive power control method for reducing voltage disturbance of a power distribution network, which comprises the following steps: obtaining installed capacity of distributed power supplySetting a lower limit of a power factorSetting an upper limit of the active ratio of the allowable slow phase operation(ii) a Obtaining active power input into distribution network by distributed power supplyAnd reactive power(ii) a Judgment ofIf yes, judge 0 -**tan(arccos() Whether it is true), if true, proceeding the next control cycle; if not, judge*tan(arccos()) -*tan(arccos() Whether the current time is up or not, if yes, entering the next control period; if not, judge>*tan(arccos() Whether or not to becomeImmediately, if so, decreaseUp to *tan(arccos()). By implementing the method, the larger voltage increment of the power distribution network caused by larger active power output of the distributed power supply can be inhibited.
Description
Technical field
The present invention relates to power technology field, relate in particular to a kind of distributed power source powerless control method that reduces distribution network voltage disturbance.
Background technology
Along with the fast development of national economy, the mankind are increasing to the demand of the energy.Along with the quick consumption of fossil energy, energy crisis is on the rise at world wide.Meanwhile, fossil energy easily produces a large amount of dusty gass and greenhouse gas in the process of using, and has brought many disadvantageous consequences to the mankind's living environment.Under the situation of this sternness, countries in the world are devoted to the exploitation of new forms of energy one after another.At power domain, the generation of electricity by new energy that exploitation disperses, to replace original centralized thermal power generation, becomes new study hotspot just gradually.
Under the pressure of the pressure of self-demand and international environment, the distributed power source that wind power generation, solar power generation be representative be take greatly developing in recent years in China.These distributed power source access electrical networks, have played certain mitigation to the problem of current fossil energy.But in distributed power source fast development, power grid enterprises exist hysteresis quality to the management of grid-connected distributed power source.Aspect idle control, current way is generally that the power factor of restriction power that distributed power source is sent out is not less than a certain restriction, as 0.95.And distributed power source is exerted oneself and is existed intermittence, fluctuation, when the distributed power source capacity of access power distribution network is when larger, the active power of sending along with distributed power source and the fluctuation of the intermittence of reactive power, under current idle control mode, both can cause larger disturbance to the voltage of power distribution network, bring the difficulty of power distribution network pressure regulation, the appreciable impact quality of power supply.
Summary of the invention
In order to suppress meritorious the exerting oneself when larger of distributed power source, cause that the voltage increment that power distribution network is larger, the present invention propose to limit the method that corresponding idle control mode of exerting oneself reduces voltage disturbance.
The invention provides a kind of distributed power source powerless control method that reduces distribution network voltage disturbance, comprise the following steps:
Step 1, the installed capacity of obtaining distributed power source
, power factor lower limit is set
, permission is set and moves mutually late the meritorious ratio upper limit
;
Step 2, obtains the active power that distributed power source is inputted power distribution network
and reactive power
;
Step 3, judgement
whether set up, if set up, enter step 4; If be false, enter step 6;
Step 4, judgement 0
-
*
* tan (arccos (
)) whether set up, if set up, enter step 8; If be false, enter step 5;
Step 5, judgement
whether >0 sets up, if set up, reduces
until
0, enter step 8; If be false, increase
until
-
*
* tan (arccos (
)), enter step 8;
Step 6, judgement
* tan (arccos (
))
-
* tan (arccos (
)) whether set up, if set up, enter step 8; If be false, enter step 7;
Step 7, judgement
>
* tan (arccos (
)) whether set up, if set up, reduce
until
* tan (arccos (
)), enter step 8; If be false, increase
until
>=-
* tan (arccos (
)), enter step 8;
Step 8, waits setting-up time, returns to step 2, starts the idle control of distributed power source of next cycle.
Wherein, described power factor lower limit
, refer to the minimum value of the power factor that allows power that distributed power source is sent out.
Wherein, described permission moves the meritorious ratio upper limit late mutually
, refer to that the active power that distributed power source is sent out that allows distributed power source to move mutually late accounts for the maximum ratio of installed capacity.
Compared with prior art, beneficial effect of the present invention is:
(1) reduced the voltage disturbance of distributed power source to power distribution network;
(2) control method is simple, easily realizes, and can obviously not increase the cost of the idle control of distributed power source.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of distributed power source powerless control method schematic flow sheet that reduces distribution network voltage disturbance.
Fig. 2 is for adopting the operation area schematic diagram of the distributed power source of institute of the present invention extracting method.
Embodiment
Referring to Fig. 1, for the invention provides a kind of distributed power source powerless control method schematic flow sheet that reduces distribution network voltage disturbance.
The distributed power source powerless control method that reduces distribution network voltage disturbance provided by the invention, comprises the following steps:
Step 1, the installed capacity of obtaining distributed power source
, power factor lower limit is set
, permission is set and moves mutually late the meritorious ratio upper limit
;
Step 2, obtains the active power that distributed power source is inputted power distribution network
and reactive power
;
Step 3, judgement
whether set up, if set up, enter step 4; If be false, enter step 6;
Step 4, judgement 0
-
*
* tan (arccos (
)) whether set up, if set up, enter step 8; If be false, enter step 5;
Step 5, judgement
whether >0 sets up, if set up, reduces
until
0, enter step 8; If be false, increase
until
-
*
* tan (arccos (
)), enter step 8;
Step 6, judgement
* tan (arccos (
))
-
* tan (arccos (
)) whether set up, if set up, enter step 8; If be false, enter step 7;
Step 7, judgement
>
* tan (arccos (
)) whether set up, if set up, reduce
until
* tan (arccos (
)), enter step 8; If be false, increase
until
-
* tan (arccos (
)), enter step 8;
Step 8, waits setting-up time, returns to step 2, starts the idle control of distributed power source of next cycle.
Wherein, described power factor lower limit
, refer to the minimum value of the power factor that allows power that distributed power source is sent out.Distributed power source under normal operation, the power factor of the power of sending out can not be less than
.
Wherein, described permission moves the meritorious ratio upper limit late mutually
, refer to that the active power that distributed power source is sent out that allows distributed power source to move mutually late accounts for the maximum ratio of installed capacity.
By take the distributed power source that a total installation of generating capacity is 49.5 MW, be example below.
The first step, the installed capacity of obtaining distributed power source
,
=49.5 MW; Power factor lower limit
span is 0.95 ~ 0.98, establishes
be 0.95; Allow to move mutually late the meritorious ratio upper limit
span be 0.4 ~ 0.6, establish
be 0.5;
Second step, obtains the active power that distributed power source is inputted power distribution network
and reactive power
; ?
=30MW,
=5 Mvar;
The 3rd step, judge
set up (
*
=24.75 MW), enter the 4th step;
The 5th step, judge 0
-
*
* tan (arccos (
)) be false (
>0), enter the 5th step;
The 5th step, judge
>0 sets up, and reduces
until
0, enter the 8th step, wait setting-up time, return to second step, start the idle control of next cycle.Circulation, repeats no more according to this.
Fig. 2 dash area represents to adopt the operation area schematic diagram of the distributed power source of institute of the present invention extracting method.
Compared with prior art, beneficial effect of the present invention is:
(1) reduced the voltage disturbance of distributed power source to power distribution network;
(2) control method is simple, easily realizes, and can obviously not increase the cost of the idle control of distributed power source.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. a distributed power source powerless control method that reduces distribution network voltage disturbance, is characterized in that, comprises the following steps:
Step 1, the installed capacity of obtaining distributed power source
, power factor lower limit is set
, permission is set and moves mutually late the meritorious ratio upper limit
;
Step 2, obtains the active power that distributed power source is inputted power distribution network
and reactive power
;
Step 3, judgement
whether set up, if set up, enter step 4; If be false, enter step 6;
Step 4, judgement 0
-
*
* tan (arccos (
)) whether set up, if set up, enter step 8; If be false, enter step 5;
Step 5, judgement
whether >0 sets up, if set up, reduces
until
0, enter step 8; If be false, increase
until
-
*
* tan (arccos (
)), enter step 8;
Step 6, judgement
* tan (arccos (
))
-
* tan (arccos (
)) whether set up, if set up, enter step 8; If be false, enter step 7;
Step 7, judgement
>
* tan (arccos (
)) whether set up, if set up, reduce
until
* tan (arccos (
)), enter step 8; If be false, increase
until
>=-
* tan (arccos (
)), enter step 8;
Step 8, waits setting-up time, returns to step 2, starts the idle control of distributed power source of next cycle.
2. a kind of distributed power source powerless control method that reduces distribution network voltage disturbance as claimed in claim 1, is characterized in that described power factor lower limit
, refer to the minimum value of the power factor that allows power that distributed power source is sent out.
3. a kind of distributed power source powerless control method that reduces distribution network voltage disturbance as claimed in claim 1 or 2, is characterized in that, described permission moves the meritorious ratio upper limit late mutually
, refer to that the active power that distributed power source is sent out that allows distributed power source to move mutually late accounts for the maximum ratio of installed capacity.
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|---|---|---|---|
| CN201410137656.8A CN103928933B (en) | 2014-04-08 | 2014-04-08 | Distributed power supply reactive power control method for reducing voltage disturbance of power distribution network |
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|---|---|---|---|
| CN201410137656.8A CN103928933B (en) | 2014-04-08 | 2014-04-08 | Distributed power supply reactive power control method for reducing voltage disturbance of power distribution network |
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| Publication Number | Publication Date |
|---|---|
| CN103928933A true CN103928933A (en) | 2014-07-16 |
| CN103928933B CN103928933B (en) | 2016-02-03 |
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ID=51147060
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162129A (en) * | 2015-10-23 | 2015-12-16 | 国家电网公司 | Distribution network reactive voltage control method taking distributed generation optimal configuration into consideration |
| CN104659789B (en) * | 2015-01-13 | 2016-09-07 | 广州市奔流电力科技有限公司 | A kind of bidimensional control method of Distributed Generation in Distribution System power factor |
| CN111899121A (en) * | 2020-06-23 | 2020-11-06 | 深圳职业技术学院 | Simple source-load coordinated operation method for regional energy system based on electric-to-gas equipment |
| CN112418477A (en) * | 2020-06-23 | 2021-02-26 | 深圳职业技术学院 | Regional energy center-based resident energy consumption dual-objective optimization method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659789B (en) * | 2015-01-13 | 2016-09-07 | 广州市奔流电力科技有限公司 | A kind of bidimensional control method of Distributed Generation in Distribution System power factor |
| CN105162129A (en) * | 2015-10-23 | 2015-12-16 | 国家电网公司 | Distribution network reactive voltage control method taking distributed generation optimal configuration into consideration |
| CN111899121A (en) * | 2020-06-23 | 2020-11-06 | 深圳职业技术学院 | Simple source-load coordinated operation method for regional energy system based on electric-to-gas equipment |
| CN112418477A (en) * | 2020-06-23 | 2021-02-26 | 深圳职业技术学院 | Regional energy center-based resident energy consumption dual-objective optimization method |
| CN111899121B (en) * | 2020-06-23 | 2023-07-04 | 深圳职业技术学院 | Regional energy system source-load coordinated operation simple method based on electric gas conversion equipment |
| CN112418477B (en) * | 2020-06-23 | 2023-07-07 | 深圳职业技术学院 | Residential energy double-objective optimization method based on regional energy center |
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| Publication number | Publication date |
|---|---|
| CN103928933B (en) | 2016-02-03 |
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