CN106532760A - Direct-current frequency-limiting controller coordinative control method for multi-direct-current-circuit sending-out island - Google Patents
Direct-current frequency-limiting controller coordinative control method for multi-direct-current-circuit sending-out island Download PDFInfo
- Publication number
- CN106532760A CN106532760A CN201611158828.5A CN201611158828A CN106532760A CN 106532760 A CN106532760 A CN 106532760A CN 201611158828 A CN201611158828 A CN 201611158828A CN 106532760 A CN106532760 A CN 106532760A
- Authority
- CN
- China
- Prior art keywords
- direct current
- circuit
- customary
- frequency
- flexible direct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Inverter Devices (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The invention discloses a direct-current frequency-limiting controller coordinative control method for a multi-direct-current-circuit sending-out island. In multi-direct-current-circuit sending-out alternating current systems of different types, the multi-direct-current-circuit FLC outer characteristics of different types are unified by a filtering link, direct-current frequency-limiting controller (FLC) parameter control, and direct-current active power change rate synchronous control. By performing coordinative matching of the multi-direct-current-circuit FLC, the power fluctuation under a multi-direct-current sending-end system failure condition can be balanced, and the frequency stability of the system is improved. The coordinative control method is applicable to the independently-controlled multi-direct-current-circuit sending-end systems of different types.
Description
Technical field
The invention belongs to the technical field of power system safety and stability analysis, and in particular to a kind of many direct currents send isolated island
Direct current frequency restriction controller control method for coordinating.
Background technology
South electric network region resource characteristic and economic development disequilibrium, determine south electric network in significant period of time
Interior needs are transferred electricity from the west to the east and trans-regional most optimum distribution of resources.Yunnan hydropower aboundresources, as the large-scale water of south electric network
Electricity sends base outside, and as electric power sends the continuous expansion of scale outside, by 2016, western Shandong DC back to back engineering was with ± 500kV forever
Benevolence to Funing DC engineering is built up after putting into operation, and 6 times DC transmission systems and south electric network major network are realized asynchronous by Yunnan Power System
Net.The island-grid sent is concentrated as many direct currents, different type direct current, the safety and stability problem that Yunnan Power System faces is by networking
Angle stability problem under mode is changed into the frequency stable problem under decoupled mode.
The energy that sending end islanded system resists power disturbance can be improved using direct current frequency limiter FLC under isolated island mode
Power, strengthens the stability of islanded system frequency, plays leading role in isolated island FREQUENCY CONTROL.But comprising different type direct current
In the island-grid sent, flexible direct current is due to using full-controlled device IGBT, generally wanting than the power adjusting speed of customary DC
Hurry up, exercise not harmony is adjusted by both is affected, system frequency vibration easily occur.
The content of the invention
For the above-mentioned technological deficiency existing for prior art, it is the direct current frequency control for solving customary DC and flexible direct current
The inconsistent technical problem of device FLC governing speeds processed, the present invention propose the direct current frequency restriction that a kind of many direct currents send isolated island
Controller coordinate control method.By filtering link, direct current frequency restriction controller state modulator, direct current active power rate of change
Synchronization Control, Frequency limit controller FLC external characteristics of the flexible direct current of each independent control with customary DC is united.
The present invention is specifically employed the following technical solutions.
A kind of many DC lines send the direct current frequency restriction controller control method for coordinating of isolated island, many DC lines
Including customary DC circuit and flexible direct current circuit；Characterized in that, methods described is comprised the steps of：
(1) frequency of converting plant change of current bus in each customary DC circuit and flexible direct current circuit is measured, it is filtered to obtain
Fundamental frequency f, calculates the departure Δ f of fundamental frequency f and power frequency；
(2) judge the departure Δ of each customary DC circuit and flexible direct current line commutation station change of current bus frequency and power frequency
Whether f exceeds its direct current frequency restriction controller FLC dead band f_dead, and when | Δ f | is during ＞ f_dead, then execution step (3), no
Then, return to step (1)；Wherein, the direct current frequency restriction controller FLC of each customary DC circuit and flexible direct current circuit adopts phase
Same dead band f_dead；
(3) the direct current frequency restriction controller FLC of each customary DC circuit and flexible direct current circuit starts, according to departure
Δ f calculates each circuit needs the dc power Δ P of adjustment；Wherein, it is straight in each customary DC circuit and flexible direct current circuit
The control mode of stream Frequency limit controller FLC is identical with control parameter holding；
(4) each customary DC circuit and flexible direct current circuit active power currency P are measurednow, add direct current to be adjusted
Power Δ P, obtains dc power reference value P of each circuitref；
(5) the conveying power of each customary DC circuit and flexible direct current circuit is adjusted to into step (4) calculated each
Circuit dc power reference value Pref；To flexible direct current active power regulation speed in the power adjustment procedure of flexible direct current circuit
Degree carries out additional control, and addition time constant is TbFirst order inertial loop.
The present invention further includes following preferred version：
In step (1), the firstorder filter transmission function for adopting is filteredTfFor filter time constant, it is each often
The T of the firstorder filter in rule DC line and flexible direct current circuitfTake identical value.
In step (3), direct current frequency controller is controlled using PI, the dc power Δ P of departure Δ f and needs adjustment
Between transmission function such as formula (1) shown in,
Wherein kpFor proportional gain, kiFor storage gain, kpAnd kiSpan be (0,9999).
In described step (5), the transmission function of first order inertial loop isTime constant is TbSolution include with
Lower step：
A () defines customary DC circuit and flexible direct current circuit active power step response time is：From active power rank
Jump instruction occurs, reaches to direct current active power and is less than 5% stable state knots modification with the absolute value of the difference of final steady-state value
Time；
B () is to the input active power step instruction of flexible direct current circuit, the real-time active power of measurement flexible direct current circuit, root
According to the definition in (a) step, flexible direct current active power step response time T is obtained1；
C () is to the input active power step instruction of customary DC circuit, the real-time active power of measurement customary DC circuit, root
According to the definition in (a) step, customary DC active power step response time T is obtained2.；
D () is according to Tb=T2-T1, obtain Tb。
The present invention has following beneficial technique effect：
Synchronously controlled by filtering link, direct current frequency restriction controller (FLC) state modulator, direct current active power rate of change
System, the FLC external characteristics of different types of multiple-circuit line is united.By cooperation multiple-circuit line FLC, many direct currents are balanced
Sending fault power fluctuates, and improves system frequency stability.
Description of the drawings
Fig. 1 is that the flow process of the direct current frequency restriction controller control method for coordinating that many DC lines of the invention send isolated island is shown
It is intended to；
Fig. 2 is shown after there is certain direct current locking failure, and active power response during each direct current FLC external characteristics disunities is bent
Line；
Fig. 3 is shown after there is certain direct current locking failure, and active power response is bent for the moment for each direct current FLC external characteristics system
Line.
Specific embodiment
Technical scheme is further stated in detail with reference to Figure of description.
Referring to the drawings 1, this method is described in detail：
(1) frequency of each customary DC and flexible direct current converting plant change of current bus is measured, it is filtered to obtain frequency f, calculate
The departure Δ f of fundamental frequency f and power frequency.Wherein, the firstorder filter transmission function that adopts of filtering forTfFor wave filter
Time constant, the T of each time DC filterfTake identical value；
(2) judge the departure Δ of each customary DC circuit and flexible direct current line commutation station change of current bus frequency and power frequency
Whether f exceeds its direct current frequency restriction controller FLC dead band f_dead, i.e. | Δ f | during ＞ f_dead, then execution step (3), if
It is no, then return to step (1).Wherein, each customary DC circuit and flexible linear road stream FLC adopt identical dead band f_dead, this
In f_dead take 0.1Hz；
(3) the direct current frequency restriction controller FLC of each customary DC circuit and flexible direct current circuit starts, according to departure
Δ f calculates each circuit needs the dc power Δ P of adjustment；Wherein, it is straight in each customary DC circuit and flexible direct current circuit
The control mode of stream frequency limit device FLC is identical with control parameter holding；
Direct current frequency controller is controlled using PI, the transmission letter between the dc power Δ P of departure Δ f and needs adjustment
Count as shown in formula (1), wherein kpFor proportional gain, kiFor storage gain；
kpAnd kiSpan for (0,9999), the preferred k of the embodiment of the present applicationp=30, ki=22.
(4) each customary DC circuit and flexible direct current active power currency P are measurednow, add dc power to be adjusted
Δ P, obtains dc power reference value Pref；
(5) the conveying power of customary DC circuit and flexible direct current circuit is adjusted to into the calculated each line of step (4)
Road dc power reference value Pref；Flexible direct current active power regulation speed is carried out in flexible direct current power adjustment procedure attached
Plus control, addition time constant is TbFirst order inertial loop.
The transmission function of first order inertial loop isTime constant is TbSolution comprise the following steps：
A () defines customary DC and flexible direct current active power step response time is, sends out from the instruction of active power step
Give birth to, the time with the absolute value of the difference of final steady-state value less than 5% stable state knots modification is reached to direct current active power.
B () is to flexible direct current input active power step instruction, the real-time active power of measurement flexible direct current, according to (a) step
Definition in rapid, obtains flexible direct current active power step response time T1=0.2 second.
C () is to customary DC input active power step instruction, the real-time active power of measurement customary DC, according to (a) step
Definition in rapid, obtains customary DC active power step response time T2=0.5 second.
D () is according to Tb=T2-T1, obtain Tb=0.3 second.
Certain multi-infeed DC islanded system is illustrated in figure 2 by the case of microvariations, it is due to the adjustment effect of FLC, soft
Property direct current and the active power reference value of customary DC 1100MW is increased to by the 1000MW before failure, flexible direct current is lifted to and is referred to
The time for making power is 0.2 second, and the time of customary DC lifting to command power is 0.5 second.
Certain multi-infeed DC islanded system is illustrated in figure 3 by the case of same disturbance, using the invention described above technology
Scheme, carries out additional control to flexible direct current active power regulation speed, after adding first order inertial loop, flexible direct current and routine
Direct current lifting is 0.5 second or so to the time of command power, basic synchronization.
Applicant describes in detail to embodiments of the invention with reference to Figure of description and describes, but this area skill
It should be understood that above example is only the preferred embodiments of the invention, explanation in detail is intended merely to help reader art personnel
More fully understand that the present invention is spiritual, and not limiting the scope of the invention, conversely, any invention essence based on the present invention
Any improvement or modification made by god should all fall within the scope and spirit of the invention.
Claims (5)
1. a kind of many DC lines send the direct current frequency restriction controller control method for coordinating of isolated island, many DC line bags
Include customary DC circuit and flexible direct current circuit；It is characterized in that：
The direct current frequency restriction controller FLC external characteristics of different types of each time DC line is united, by coordinating to match somebody with somebody
The direct current frequency restriction controller FLC of multiple-circuit line circuit is closed, many DC line sending fault powers are balanced
Fluctuation, improves system frequency stability.
2. a kind of many DC lines send the direct current frequency restriction controller control method for coordinating of isolated island, many DC line bags
Include customary DC circuit and flexible direct current circuit；Characterized in that, methods described is comprised the steps of：
(1) frequency of converting plant change of current bus in each customary DC circuit and flexible direct current circuit is measured, it is filtered to obtain fundamental wave
Frequency f, calculates the departure Δ f of fundamental frequency f and power frequency；
(2) judge the departure Δ of each customary DC circuit and flexible direct current line commutation station change of current bus fundamental frequency and power frequency
Whether f exceeds its direct current frequency restriction controller FLC dead band f_dead, and when | Δ f | is during ＞ f_dead, then execution step (3), no
Then, return to step (1)；Wherein, the direct current frequency restriction controller FLC of each customary DC circuit and flexible direct current circuit adopts phase
Same dead band f_dead；
(3) the direct current frequency restriction controller FLC of each customary DC circuit and flexible direct current circuit starts, according to departure Δ f
Calculating each circuit needs the dc power Δ P of adjustment；Wherein, the direct current frequency in each customary DC circuit and flexible direct current circuit
The control mode of rate restriction controller FLC is identical with control parameter holding；
(4) each customary DC circuit and flexible direct current circuit active power currency P are measurednow, add dc power to be adjusted
Δ P, obtains dc power reference value P of each circuitref；
(5) the conveying power of each customary DC circuit and flexible direct current circuit is adjusted to into the calculated each circuit of step (4)
Dc power reference value Pref；Flexible direct current active power regulation speed is entered in the power adjustment procedure of flexible direct current circuit
Row additional control, addition time constant are TbFirst order inertial loop.
3. many DC lines according to claim 2 send the direct current frequency restriction controller control method for coordinating of isolated island,
It is characterized in that：
In step (1), the firstorder filter transmission function for adopting is filteredTfFor filter time constant, each customary DC
The T of the firstorder filter in circuit and flexible direct current circuitfTake identical value.
4. many DC lines according to claim 2 send the direct current frequency restriction controller control method for coordinating of isolated island,
It is characterized in that：
In step (3), direct current frequency controller is controlled using PI, between the dc power Δ P of departure Δ f and needs adjustment
Transmission function such as formula (1) shown in,
Wherein kpFor proportional gain, kiFor storage gain, kpAnd kiSpan be (0,9999).
5. many DC lines according to claim 2 send the direct current frequency restriction controller control method for coordinating of isolated island,
It is characterized in that：
In described step (5), the transmission function of first order inertial loop isTime constant is TbSolution include following step
Suddenly：
A () defines customary DC circuit and flexible direct current circuit active power step response time is：Refer to from active power step
Order occurs, and the time that 5% stable state knots modification is less than with the absolute value of the difference of final steady-state value is reached to direct current active power；
B () measures the real-time active power of flexible direct current circuit to the input active power step instruction of flexible direct current circuit, according to
A the definition in () step, obtains flexible direct current active power step response time T1；
C () measures the real-time active power of customary DC circuit to the input active power step instruction of customary DC circuit, according to
A the definition in () step, obtains customary DC active power step response time T2.；
D () is according to Tb=T2-T1, obtain Tb。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611158828.5A CN106532760B (en) | 2016-12-15 | 2016-12-15 | A kind of more DC lines send out the direct current frequency restriction controller control method for coordinating of isolated island |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611158828.5A CN106532760B (en) | 2016-12-15 | 2016-12-15 | A kind of more DC lines send out the direct current frequency restriction controller control method for coordinating of isolated island |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106532760A true CN106532760A (en) | 2017-03-22 |
| CN106532760B CN106532760B (en) | 2019-01-29 |
Family
ID=58339667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611158828.5A Active CN106532760B (en) | 2016-12-15 | 2016-12-15 | A kind of more DC lines send out the direct current frequency restriction controller control method for coordinating of isolated island |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106532760B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769226A (en) * | 2017-10-25 | 2018-03-06 | 贵州电网有限责任公司电力调度控制中心 | A kind of mains frequency control method based on mixed DC feed-in |
| CN117638998A (en) * | 2024-01-25 | 2024-03-01 | 国网经济技术研究院有限公司 | Multi-DC frequency controller optimization method considering frequency modulation standby of asynchronous interconnected power grid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633642A (en) * | 2013-11-06 | 2014-03-12 | 南方电网科学研究院有限责任公司 | Method for planning and analyzing frequency stability of power grid of water and power dominated island |
| CN103633638A (en) * | 2013-11-06 | 2014-03-12 | 南方电网科学研究院有限责任公司 | Frequency control strategy for multiple DC (Direct Current) send-out island power grid |
| CN103986170A (en) * | 2014-03-05 | 2014-08-13 | 国家电网公司 | Direct current transmission system and generator set joint frequency modulation starting method |
| CN105119288A (en) * | 2015-07-28 | 2015-12-02 | 云南电网有限责任公司电网规划研究中心 | Coordination control and parameter optimization method for multi-loop DC frequency limit controller |
-
2016
- 2016-12-15 CN CN201611158828.5A patent/CN106532760B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633642A (en) * | 2013-11-06 | 2014-03-12 | 南方电网科学研究院有限责任公司 | Method for planning and analyzing frequency stability of power grid of water and power dominated island |
| CN103633638A (en) * | 2013-11-06 | 2014-03-12 | 南方电网科学研究院有限责任公司 | Frequency control strategy for multiple DC (Direct Current) send-out island power grid |
| CN103986170A (en) * | 2014-03-05 | 2014-08-13 | 国家电网公司 | Direct current transmission system and generator set joint frequency modulation starting method |
| CN105119288A (en) * | 2015-07-28 | 2015-12-02 | 云南电网有限责任公司电网规划研究中心 | Coordination control and parameter optimization method for multi-loop DC frequency limit controller |
Non-Patent Citations (1)
| Title |
|---|
| 陈亦平等: "高压直流输电系统孤岛运行调频策略", 《中国电机工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769226A (en) * | 2017-10-25 | 2018-03-06 | 贵州电网有限责任公司电力调度控制中心 | A kind of mains frequency control method based on mixed DC feed-in |
| CN117638998A (en) * | 2024-01-25 | 2024-03-01 | 国网经济技术研究院有限公司 | Multi-DC frequency controller optimization method considering frequency modulation standby of asynchronous interconnected power grid |
| CN117638998B (en) * | 2024-01-25 | 2024-04-05 | 国网经济技术研究院有限公司 | Multi-DC frequency controller optimization method considering frequency modulation standby of asynchronous interconnected power grid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106532760B (en) | 2019-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105135409B (en) | Supercritical unit boiler master controller control method based on primary frequency modulation action amplitude | |
| CN107679769B (en) | Method for establishing frequency response model of power system containing wind power and method for calculating frequency characteristic index | |
| CN104089270B (en) | A kind of generating set boiler load control and optimize Adjustment Tests method | |
| CN105226653A (en) | The exact linearization method of transformer model in a kind of active distribution network optimal load flow | |
| CN105119288B (en) | Coordination control and parameter optimization method for multi-loop DC frequency limit controller | |
| CN106532745B (en) | A kind of frequency coordination control method for sending out isolated island for more DC lines | |
| CN106602613B (en) | A kind of province ground two-level scheduler section control method for coordinating | |
| EP3136534A1 (en) | Direct-current transmission inversion-side frequency control method | |
| CN110021942B (en) | DCS-based frequency modulation control method | |
| CN106532760A (en) | Direct-current frequency-limiting controller coordinative control method for multi-direct-current-circuit sending-out island | |
| CN108092322A (en) | A kind of AGC control methods based on frequency modulation market environment | |
| CN106712106A (en) | Online virtual impedance adjustment method capable of inhibiting circulation of parallel running inverters | |
| CN107516888A (en) | The multiterminal flexible direct current system droop control method of the Secondary Control containing DC voltage | |
| CN106684931B (en) | Active control method and control system for new energy power plant | |
| CN102998972B (en) | Based on the fired power generating unit intelligence sliding pressure curve design method of cooperation control quality | |
| CN106408457A (en) | Reactive power loss based electric power system SCADA bad data filtering method | |
| CN106787013B (en) | Off-network energy-storage system and its control method | |
| CN108954286A (en) | A kind of calculation method and system of boiler input dynamic assisted instruction | |
| CN108695892B (en) | Power distribution network voltage control method based on photovoltaic inverter regulation | |
| CN110957745A (en) | Method for improving frequency stability of power grid based on sliding mode control | |
| CN106992528A (en) | A kind of method of the improvement idle allocation strategies of unit AVC | |
| CN108039738B (en) | Hydroelectric generating set load control method | |
| CN105576652B (en) | A kind of voltage control method and system of D.C. high voltage transmission sending end | |
| CN105402087B (en) | Wind turbines feather method for handover control | |
| CN106849145A (en) | For control method and system that direct current frequency limiter and algorithm for power modulation are coordinated |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210827 Address after: 510700 3rd, 4th and 5th floors of building J1 and 3rd floor of building J3, No.11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: China Southern Power Grid Research Institute Co.,Ltd. Patentee after: Beijing Sifang Automation Co.,Ltd. Address before: 510080 floors 13-21, West Tower, Yuedian building, No. 6, shuijungang, Dongfeng East Road, Yuexiu District, Guangzhou, Guangdong Province Patentee before: CSG POWER GRID TECHNOLOGY RESEARCH CENTER Patentee before: China Southern Power Grid Research Institute Co.,Ltd. Patentee before: Beijing Sifang Automation Co.,Ltd. |