CN113013900A - Excitation regulator PSS2A model parameter configuration method - Google Patents
Excitation regulator PSS2A model parameter configuration method Download PDFInfo
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- CN113013900A CN113013900A CN202110327837.7A CN202110327837A CN113013900A CN 113013900 A CN113013900 A CN 113013900A CN 202110327837 A CN202110327837 A CN 202110327837A CN 113013900 A CN113013900 A CN 113013900A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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Abstract
An excitation regulator PSS2A model parameter configuration method. The currently used excitation regulator PSS2A model is not correspondingly adjusted, so that the 2A model of the unit is not the optimal configuration after the operation mode is changed, and the difficult problem that how to configure the parameters of the PSS2A model to adapt to different operation conditions is difficult to solve is solved. The method of the invention comprises the following steps: expanding 21 groups of PSS parameter sets on the basis that the original 15 groups of PSS parameter sets are used as a man-machine interaction interface of the excitation system, wherein 3 groups of PSS parameter sets are low-pressure cylinders, and the same parameter set space is newly added to a controller EEPROM; the newly added PSS parameter set and the original PSS parameter set are not influenced mutually, an input amount extraction and condensation mode is added at an AVR state interface in the GEC-300 software of the excitation regulator, and an extraction and condensation mode/back pressure mode conversion handle is added on a front panel of the regulation cabinet to realize switching of the PSS parameter sets; when the regulator is powered on, the two sets of PSS parameter sets are initialized simultaneously, and the controller starts signals in a pumping and condensing mode/back pressure mode. The method is used for the excitation regulator PSS2A model parameter configuration method.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a method for configuring parameters of a PSS2A model of an excitation regulator.
Background
Along with the continuous expansion of the scale of an electric power system and the massive adoption of a quick excitation device, the damping of the system is reduced, so that the possibility of low-frequency oscillation of the electric power system is greatly increased, a Power System Stabilizer (PSS) is specially designed for inhibiting the low-frequency oscillation phenomenon generated by negative damping or weak damping in the electric power system, belongs to the additional control of the excitation system, and has the main functions of quickly and effectively settling the low-frequency oscillation of the electric power system, reducing the overshoot in the oscillation process and effectively ensuring the dynamic stability of the system;
at present, the first NCB type combined heat and power units independently researched and developed in China respectively design a condensation pumping mode and a back pressure mode, and a commonly used excitation regulator PSS2A model is not adjusted correspondingly, so that the 2A model of the unit is not optimally configured after the operation mode is changed, and therefore, the difficult problem that whether PSS has optimal adjustment or not when a power grid is unstable or not can not be judged, and how to configure PSS2A model parameters to adapt to different operation conditions is difficult to solve.
Disclosure of Invention
Along with the continuous expansion of the scale of an electric power system and the massive adoption of a quick excitation device, the damping of the system is reduced, so that the possibility of low-frequency oscillation of the electric power system is greatly increased, a Power System Stabilizer (PSS) is specially designed for inhibiting the low-frequency oscillation phenomenon generated by negative damping or weak damping in the electric power system, belongs to the additional control of the excitation system, and has the main functions of quickly and effectively settling the low-frequency oscillation of the electric power system, reducing the overshoot in the oscillation process and effectively ensuring the dynamic stability of the system;
at present, the first NCB type combined heat and power units independently researched and developed in China respectively design a condensation pumping mode and a back pressure mode, and a commonly used excitation regulator PSS2A model is not adjusted correspondingly, so that the 2A model of the unit is not optimally configured after the operation mode is changed, and therefore, the difficult problem that whether PSS has optimal adjustment or not when a power grid is unstable or not can not be judged, and how to configure PSS2A model parameters to adapt to different operation conditions is difficult to solve.
The invention comprises the following contents:
the invention aims to provide a method for configuring parameters of a PSS2A model of an excitation regulator, which adapts to different running modes of a generator by setting 2 sets of different PSS2A model parameters, avoids reactive reverse regulation during load expansion and ensures that a steam turbine of a unit can run normally during peak regulation.
The above purpose is realized by the following technical scheme:
an excitation regulator PSS2A model parameter configuration method, comprising the steps of: firstly, expanding 21 groups of PSS parameter sets on the basis that an excitation system human-computer interaction interface is expanded from 15 original groups of PSS parameter sets, wherein 3 groups of PSS parameter sets are low-pressure cylinder PSS parameter sets, and simultaneously adding the same parameter set space in a controller EEPROM; the newly added PSS parameter set and the original PSS parameter set are not influenced mutually, an input amount extraction and condensation mode is added at an AVR state interface in the GEC-300 software of the excitation regulator, and an extraction and condensation mode/back pressure mode conversion handle is added on a front panel of the regulation cabinet to realize switching of the PSS parameter sets;
(1) when the regulator is electrified, the two sets of PSS parameter sets are initialized simultaneously to enable internal operation parameters to be accurate, the controller starts signals in a condensation mode/back pressure mode, and the condensation mode PSS parameter set or the back pressure mode PSS parameter set is selected to participate in operation;
(2) when the PSS operation mode is a backpressure mode, the 6ZK contact is in an open state, the low-pressure cylinder operation loop is disconnected, and the regulator parameters are backpressure mode parameter sets; when the PSS operation mode is switched to the extraction and condensation mode, the 6ZK contact is in a closed state, the relay is started after the low-pressure cylinder operation loop is switched on, the contact opens CPUA and CPUB of the excitation regulator, the extraction and condensation mode operation lamp is on, and the inside is switched to the parameter set of the extraction and condensation mode.
According to the excitation regulator PSS2A model parameter configuration method, a pumping condensation mode/back pressure mode conversion handle 6ZK, a KI14 relay, a KI15 relay, a KI16 relay and a KI17 relay are added on the front panel of a regulating cabinet, the KI14 relay represents low-pressure cylinder operation, the KI15 relay represents process step quantity, the KI16 relay and the KI17 relay can achieve remote operation, an 613 loop can achieve a remote operation function, and a 615 loop can achieve a local operation function.
Has the advantages that:
1. the invention relates to a parameter configuration method for a PSS2A model of an excitation regulator, which is characterized in that 2 sets of different PSS2A model parameters are set, so that different running modes of a generator are adapted, the reactive back-regulation phenomenon during load expansion is avoided, the normal running of a steam turbine during peak regulation of a unit is ensured, the large load fluctuation is avoided, the PSS is subjected to back-regulation to reach the low excitation limit value, and the PSS regulation function is locked.
2. The invention provides powerful data and technical support for other units of the same type when the parameter of the PSS2A model is considered to be reconfigured, and has certain reference value.
3. The method is used for the first NCB type combined heat and power unit independently researched and developed in China, two operation modes of extraction and condensation and backpressure are designed, and the parameter configuration of the PSS model of the excitation system is redesigned, so that the PSS parameter configuration in the extraction and condensation mode is the optimal configuration under the backpressure working condition.
Description of the drawings:
FIG. 1 is a schematic wiring diagram of the excitation regulator of the present invention.
Fig. 2 is a schematic view of the mode of operation switching handle of the present invention.
FIG. 3 is a wiring diagram of the KI14 relay, the KI15 relay, the KI16 relay and the KI17 relay of the invention.
The specific implementation mode is as follows:
example 1:
an excitation regulator PSS2A model parameter configuration method, comprising the steps of: firstly, expanding 21 groups of PSS parameter sets on the basis that an excitation system human-computer interaction interface is expanded from 15 original groups of PSS parameter sets, wherein 3 groups of PSS parameter sets are low-pressure cylinder PSS parameter sets, and simultaneously adding the same parameter set space in a controller EEPROM; the newly added PSS parameter set and the original PSS parameter set are not influenced mutually, an input amount extraction and condensation mode is added at an AVR state interface in the GEC-300 software of the excitation regulator, and an extraction and condensation mode/back pressure mode conversion handle is added on a front panel of the regulation cabinet to realize switching of the PSS parameter sets;
(1) when the regulator is electrified, the two sets of PSS parameter sets are initialized simultaneously to enable internal operation parameters to be accurate, the controller starts signals in a condensation mode/back pressure mode, and the condensation mode PSS parameter set or the back pressure mode PSS parameter set is selected to participate in operation;
(2) when the PSS operation mode is a backpressure mode, the 6ZK contact is in an open state, the low-pressure cylinder operation loop is disconnected, and the regulator parameters are backpressure mode parameter sets; when the PSS operation mode is switched to the extraction and condensation mode, the 6ZK contact is in a closed state, the relay is started after the low-pressure cylinder operation loop is switched on, the contact opens CPUA and CPUB of the excitation regulator, the extraction and condensation mode operation lamp is on, and the inside is switched to the parameter set of the extraction and condensation mode.
Example 2:
according to the parameter configuration method of the excitation regulator PSS2A model in embodiment 1, a pumping/back pressure mode switching handle 6ZK, a KI14 relay, a KI15 relay, a KI16 relay and a KI17 relay are added on the front panel of the regulation cabinet, the KI14 relay represents low-pressure cylinder operation, the KI15 relay represents process step quantity, the KI16 relay and the KI17 relay can be operated remotely, an 613 loop can be operated remotely, and a 615 loop can be operated locally.
FIG. 3 is an actual wiring diagram of the additionally mounted relay, wherein the wiring diagram is shown in the contents of a KI14 relay, a KI15 relay, a KI16 relay and a KI17 relay, and the wiring diagram is sequentially connected from left to right;
FIG. 2 is a schematic view of the operation mode switching handle, and it can be known from the figure that the operation state of the "extraction condensing mode" or the "back pressure mode" is switched by the 6ZK switching handle;
the method comprises the following specific operation steps:
switching the pumping and condensing mode to the back pressure mode:
(1) before the unit is switched from the condensing extraction mode to the back pressure mode for operation, operating and quitting the No. 3 machine excitation PSS on a DCS excitation picture;
(2) the normal operation can be switched from the pumping condensation mode to the back pressure mode;
(3) switching to a backpressure mode to stably operate the unit;
(3) the operation mode is switched to the state of back pressure mode in the unit excitation room-unit excitation adjusting cabinet;
(4) checking whether the flat plate machine of the excitation adjusting cabinet of the unit-AVR state picture-A set and B set 'low-pressure cylinder operation' indicator lamps are not on;
(5) operating a set excitation PSS on an excitation picture of a DCS set;
switching the back pressure mode to the pumping condensation mode:
(1) before the unit is switched from the backpressure mode to the extraction condensing mode to operate, the unit excitation PSS is exited in the DCS unit excitation picture operation;
(2) the normal operation can be switched from the back pressure mode to the extraction condensing mode;
(3) switching to a pumping condensing mode to stably operate the unit;
(4) and switching the 'operation mode' to the 'extraction condensing mode' state in the unit excitation room-unit excitation adjusting cabinet.
(5) Checking whether a unit excitation adjusting cabinet flat machine-AVR state picture-A set and B set of low-pressure cylinder operation indicating lamps are on;
(6) and operating and putting the unit excitation PSS in the DCS unit excitation picture.
Claims (2)
1. An excitation regulator PSS2A model parameter configuration method is characterized in that: the method comprises the following steps: firstly, expanding 21 groups of PSS parameter sets on the basis that an excitation system human-computer interaction interface is expanded from 15 original groups of PSS parameter sets, wherein 3 groups of PSS parameter sets are low-pressure cylinder PSS parameter sets, and simultaneously adding the same parameter set space in a controller EEPROM; the newly added PSS parameter set and the original PSS parameter set are not influenced mutually, an input amount extraction and condensation mode is added at an AVR state interface in the GEC-300 software of the excitation regulator, and an extraction and condensation mode/back pressure mode conversion handle is added on a front panel of the regulation cabinet to realize switching of the PSS parameter sets;
(1) when the regulator is electrified, the two sets of PSS parameter sets are initialized simultaneously to enable internal operation parameters to be accurate, the controller starts signals in a condensation mode/back pressure mode, and the condensation mode PSS parameter set or the back pressure mode PSS parameter set is selected to participate in operation;
(2) when the PSS operation mode is a backpressure mode, the 6ZK contact is in an open state, the low-pressure cylinder operation loop is disconnected, and the regulator parameters are backpressure mode parameter sets; when the PSS operation mode is switched to the extraction and condensation mode, the 6ZK contact is in a closed state, the relay is started after the low-pressure cylinder operation loop is switched on, the contact opens CPUA and CPUB of the excitation regulator, the extraction and condensation mode operation lamp is on, and the inside is switched to the parameter set of the extraction and condensation mode.
2. The excitation regulator PSS2A model parameter configuration method as claimed in claim 1, wherein: a pumping condensation mode/back pressure mode conversion handle 6ZK, a KI14 relay, a KI15 relay, a KI16 relay and a KI17 relay are added on the front panel of the regulating cabinet, the KI14 relay represents the operation of a low-pressure cylinder, the KI15 relay represents the process step amount, the KI16 relay and the KI17 relay can realize remote operation, the 613 loop can realize a remote operation function, and the 615 loop can realize a local operation function.
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| EP2703914A1 (en) * | 2011-10-13 | 2014-03-05 | Institute of Nuclear Energy Research Atomic Energy Council | Hybrid control system and method for automatic voltage regulator |
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| EP2703914A1 (en) * | 2011-10-13 | 2014-03-05 | Institute of Nuclear Energy Research Atomic Energy Council | Hybrid control system and method for automatic voltage regulator |
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