CN102064564A - Power generation grid-connected method for alternating current generator - Google Patents
Power generation grid-connected method for alternating current generator Download PDFInfo
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- CN102064564A CN102064564A CN2010105873684A CN201010587368A CN102064564A CN 102064564 A CN102064564 A CN 102064564A CN 2010105873684 A CN2010105873684 A CN 2010105873684A CN 201010587368 A CN201010587368 A CN 201010587368A CN 102064564 A CN102064564 A CN 102064564A
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Abstract
The invention relates to a power generation grid-connected method for an alternating current generator, which belongs to grid-connected ranges. Aiming at the conditions of unstable voltage, increased harmonic waves and pollution to a main power grid existing in the current wind power generating grid connection, the method provides a way of voltage stabilization, synchronous rotating speed stabilization and mechanical torque change adjusted by power generating current. The grid is connected with the alternating current generator according to a change range which can be provided by an external environment or an external facility and aims at the generator moment by setting a maximal loaded line between the main grid and the alternating current generator and the maximal rated power and current of the alternating current generator to be capable of running at maximal moment; the generator carries out motor no-load rotation which is synchronous with the grid; then, external mechanical force is gradually introduced into rotor moment completely by mechanical or electromagnetic connection so that external mechanical moment is larger than electromagnetic rotating moment formed when the alternating current generator used as a motor for no-load rotation; and when the external mechanical moment for power generation is suddenly increased, power generating current can be suddenly increased, the rotating speed is not changed and power generating voltage is also not changed, thereby having the voltage stabilization grid connecting effect.
Description
Technical field: electric power is incorporated into the power networks
Background technology:
At present also there is the technical problem of many classes that are incorporated into the power networks in wind power generation, before thermal power generation be incorporated into the power networks and also have enormous impact electrical network.The thermal power generation procedure of adaptation that has been incorporated into the power networks just.And wind power generation bigger variation of square because machinery is walked around causes voltage fluctuated, electrical network is impacted, and not only regulation and control difficulty, and also harmonic wave increases, and main electrical network is polluted.
Summary of the invention:
At the spread of voltage, the harmonic wave that exist at present wind power-generating grid-connected increase, to this situation that main electrical network pollutes, propose voltage stabilizing, synchronism stability rotating speed, mechanical force moment and change the mode of regulating by generation current.The excursion at generator torque that can provide according to external environment condition or outside plant, can under maximum moment, move by setting the maximum load circuit between main electrical network and the alternating current generator and the maximum rated power and the electric current of alternating current generator, connect electrical network and alternating current generator, generator is done and the unloaded rotation of the motor of synchronized, at this moment generator objectively is a rotating speed and the little motor that is lower than electrical network of frequency, connect by machinery or electromagnetism then, be incorporated into external mechanical force in the rotor torque fully gradually, electromagnetism turning moment when exterior mechanical moment is rotated as " motor " is unloaded greater than alternating current generator, at this moment little frequency and rotating speed of rotor speed and speed greater than main electrical network, when the exterior mechanical moment that is used to generate electricity increases suddenly, generation current can increase suddenly, rotating speed is constant, generating voltage is also constant, at this moment generator power improves, main electrical network power output is increased, main electrical network only needs generated output is carried out flexible adjustment, do not need regulation voltage and harmonic wave, thereby realize the stable purpose that is incorporated into the power networks.
Embodiment
At the spread of voltage, the harmonic wave that exist at present wind power-generating grid-connected increase, to this situation that main electrical network pollutes, propose voltage stabilizing, synchronism stability rotating speed, mechanical force moment and change the mode of regulating by generation current.The excursion at generator torque that can provide according to external environment condition or outside plant, can under maximum moment, move by setting the maximum load circuit between main electrical network and the alternating current generator and the maximum rated power and the electric current of alternating current generator, connect electrical network and alternating current generator, generator is done and the unloaded rotation of the motor of synchronized, at this moment generator objectively is a rotating speed and the little motor that is lower than electrical network of frequency, connect by machinery or electromagnetism then, be incorporated into external mechanical force in the rotor torque fully gradually, electromagnetism turning moment when exterior mechanical moment is rotated as " motor " is unloaded greater than alternating current generator, at this moment little frequency and rotating speed of rotor speed and speed greater than main electrical network, when the exterior mechanical moment that is used to generate electricity increases suddenly, generation current can increase suddenly, rotating speed is constant, generating voltage is also constant, at this moment generator power improves, main electrical network power output is increased, main electrical network only needs generated output is carried out flexible adjustment, do not need regulation voltage and harmonic wave, thereby realize the stable purpose that is incorporated into the power networks.
Wherein above-described: " maximum load circuit and maximum rated power and electric current " is mainly at wind-driven generator.Because wind-driven generator is in the environment that a wind speed changes often, mechanical rotation moment also changes often, minimum wind force and maximum wind power can differ tens times to tens times, so alternating current generator tens times of consumed power when rated power is greater than unloaded rotation when rotating as motor.Specifically to set, otherwise can cause rotating speed to increase the situation that voltage increases suddenly suddenly equally in case surpass maximum rated power during the strong wind operation according to the running environment of wind-driven generator.So the definite of maximum rated power will suitably increase the maximum rated power value according to the situation of change of wind field and environment.
Claims (1)
1. the method for an ac generator electricity generation grid-connecting, its method is: the excursion at generator torque that can provide according to external environment condition or outside plant, can under maximum moment, move by setting the maximum load circuit between main electrical network and the alternating current generator and the maximum rated power and the electric current of alternating current generator, connect electrical network and alternating current generator, generator is done and the unloaded rotation of the motor of synchronized, at this moment generator objectively is a rotating speed and the little motor that is lower than electrical network of frequency, connect by machinery or electromagnetism then, gradually external mechanical force is incorporated in the rotor torque fully the electromagnetism turning moment when exterior mechanical moment is rotated as " motor " is unloaded greater than alternating current generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105873684A CN102064564A (en) | 2010-12-07 | 2010-12-07 | Power generation grid-connected method for alternating current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105873684A CN102064564A (en) | 2010-12-07 | 2010-12-07 | Power generation grid-connected method for alternating current generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102064564A true CN102064564A (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105873684A Pending CN102064564A (en) | 2010-12-07 | 2010-12-07 | Power generation grid-connected method for alternating current generator |
Country Status (1)
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| CN (1) | CN102064564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620904A (en) * | 2011-06-22 | 2014-03-05 | 川崎重工业株式会社 | Control method and control system for parallel operation of different types of power generation apparatuses |
-
2010
- 2010-12-07 CN CN2010105873684A patent/CN102064564A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620904A (en) * | 2011-06-22 | 2014-03-05 | 川崎重工业株式会社 | Control method and control system for parallel operation of different types of power generation apparatuses |
| CN103620904B (en) * | 2011-06-22 | 2016-03-02 | 川崎重工业株式会社 | Parallel Operation Control method between variety classes Blast Furnace Top Gas Recovery Turbine Unit (TRT) and control system |
| US9391458B2 (en) | 2011-06-22 | 2016-07-12 | Kawasaki Jukogyo Kabushiki Kaisha | Control method and control system for parallel operation of different types of power generation apparatuses |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110518 |